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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] x86_emulate: Remove environment-specific definitions from core
# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1206969673 -3600
# Node ID d434c73ec8b79ec177fb0a7117c21ca3371c6f7d
# Parent d24f37b31030bdc9305e40a9a71846e6f79909d7
x86_emulate: Remove environment-specific definitions from core
emulator source files.
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
.hgignore | 1
tools/tests/Makefile | 10
tools/tests/test_x86_emulator.c | 29
tools/tests/x86_emulate.c | 13
xen/arch/x86/x86_emulate.c | 3459 ---------------------------------
xen/arch/x86/x86_emulate/x86_emulate.c | 3429 ++++++++++++++++++++++++++++++++
xen/arch/x86/x86_emulate/x86_emulate.h | 401 +++
xen/include/asm-x86/x86_emulate.h | 403 ---
8 files changed, 3880 insertions(+), 3865 deletions(-)
diff -r d24f37b31030 -r d434c73ec8b7 .hgignore
--- a/.hgignore Mon Mar 31 10:40:43 2008 +0100
+++ b/.hgignore Mon Mar 31 14:21:13 2008 +0100
@@ -179,6 +179,7 @@
^tools/tests/blowfish\.bin$
^tools/tests/blowfish\.h$
^tools/tests/test_x86_emulator$
+^tools/tests/x86_emulate$
^tools/vnet/Make.local$
^tools/vnet/build/.*$
^tools/vnet/gc$
diff -r d24f37b31030 -r d434c73ec8b7 tools/tests/Makefile
--- a/tools/tests/Makefile Mon Mar 31 10:40:43 2008 +0100
+++ b/tools/tests/Makefile Mon Mar 31 14:21:13 2008 +0100
@@ -21,13 +21,17 @@ blowfish.h: blowfish.bin
.PHONY: clean
clean:
- rm -rf $(TARGET) *.o *~ core blowfish.h blowfish.bin
+ rm -rf $(TARGET) *.o *~ core blowfish.h blowfish.bin x86_emulate
.PHONY: install
install:
-x86_emulate.o: $(XEN_ROOT)/xen/arch/x86/x86_emulate.c
+.PHONY: x86_emulate
+x86_emulate:
+ [ -L x86_emulate ] || ln -sf $(XEN_ROOT)/xen/arch/x86/x86_emulate .
+
+x86_emulate.o: x86_emulate.c x86_emulate
$(HOSTCC) $(HOSTCFLAGS) -I$(XEN_ROOT)/xen/include -c -o $@ $<
-test_x86_emulator.o: test_x86_emulator.c blowfish.h
+test_x86_emulator.o: test_x86_emulator.c blowfish.h x86_emulate
$(HOSTCC) $(HOSTCFLAGS) -I$(XEN_ROOT)/xen/include -c -o $@ $<
diff -r d24f37b31030 -r d434c73ec8b7 tools/tests/test_x86_emulator.c
--- a/tools/tests/test_x86_emulator.c Mon Mar 31 10:40:43 2008 +0100
+++ b/tools/tests/test_x86_emulator.c Mon Mar 31 14:21:13 2008 +0100
@@ -1,20 +1,11 @@
-
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
-typedef uint8_t u8;
-typedef uint16_t u16;
-typedef uint32_t u32;
-typedef uint64_t u64;
-typedef int8_t s8;
-typedef int16_t s16;
-typedef int32_t s32;
-typedef int64_t s64;
#include <public/xen.h>
-#include <asm-x86/x86_emulate.h>
#include <sys/mman.h>
+#include "x86_emulate/x86_emulate.h"
#include "blowfish.h"
#define MMAP_SZ 16384
@@ -38,9 +29,9 @@ static int read(
unsigned long addr = offset;
switch ( bytes )
{
- case 1: *val = *(u8 *)addr; break;
- case 2: *val = *(u16 *)addr; break;
- case 4: *val = *(u32 *)addr; break;
+ case 1: *val = *(uint8_t *)addr; break;
+ case 2: *val = *(uint16_t *)addr; break;
+ case 4: *val = *(uint32_t *)addr; break;
case 8: *val = *(unsigned long *)addr; break;
}
return X86EMUL_OKAY;
@@ -56,9 +47,9 @@ static int write(
unsigned long addr = offset;
switch ( bytes )
{
- case 1: *(u8 *)addr = (u8)val; break;
- case 2: *(u16 *)addr = (u16)val; break;
- case 4: *(u32 *)addr = (u32)val; break;
+ case 1: *(uint8_t *)addr = (uint8_t)val; break;
+ case 2: *(uint16_t *)addr = (uint16_t)val; break;
+ case 4: *(uint32_t *)addr = (uint32_t)val; break;
case 8: *(unsigned long *)addr = val; break;
}
return X86EMUL_OKAY;
@@ -75,9 +66,9 @@ static int cmpxchg(
unsigned long addr = offset;
switch ( bytes )
{
- case 1: *(u8 *)addr = (u8)new; break;
- case 2: *(u16 *)addr = (u16)new; break;
- case 4: *(u32 *)addr = (u32)new; break;
+ case 1: *(uint8_t *)addr = (uint8_t)new; break;
+ case 2: *(uint16_t *)addr = (uint16_t)new; break;
+ case 4: *(uint32_t *)addr = (uint32_t)new; break;
case 8: *(unsigned long *)addr = new; break;
}
return X86EMUL_OKAY;
diff -r d24f37b31030 -r d434c73ec8b7 tools/tests/x86_emulate.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/tests/x86_emulate.c Mon Mar 31 14:21:13 2008 +0100
@@ -0,0 +1,13 @@
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+#include <public/xen.h>
+
+#include "x86_emulate/x86_emulate.h"
+
+#define __emulate_fpu_insn(_op) \
+do{ rc = X86EMUL_UNHANDLEABLE; \
+ goto done; \
+} while (0)
+
+#include "x86_emulate/x86_emulate.c"
diff -r d24f37b31030 -r d434c73ec8b7 xen/arch/x86/x86_emulate.c
--- a/xen/arch/x86/x86_emulate.c Mon Mar 31 10:40:43 2008 +0100
+++ b/xen/arch/x86/x86_emulate.c Mon Mar 31 14:21:13 2008 +0100
@@ -1,484 +1,18 @@
/******************************************************************************
* x86_emulate.c
*
- * Generic x86 (32-bit and 64-bit) instruction decoder and emulator.
+ * Wrapper for generic x86 instruction decoder and emulator.
*
- * Copyright (c) 2005-2007 Keir Fraser
- * Copyright (c) 2005-2007 XenSource Inc.
+ * Copyright (c) 2008, Citrix Systems, Inc.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Authors:
+ * Keir Fraser <keir.fraser@xxxxxxxxxx>
*/
-#ifndef __XEN__
-#include <stddef.h>
-#include <stdint.h>
-#include <string.h>
-#include <public/xen.h>
-#else
-#include <xen/config.h>
-#include <xen/types.h>
-#include <xen/lib.h>
-#include <asm/regs.h>
+#include <asm/x86_emulate.h>
+
#undef cmpxchg
-#endif
-#include <asm-x86/x86_emulate.h>
-/* Operand sizes: 8-bit operands or specified/overridden size. */
-#define ByteOp (1<<0) /* 8-bit operands. */
-/* Destination operand type. */
-#define DstBitBase (0<<1) /* Memory operand, bit string. */
-#define ImplicitOps (1<<1) /* Implicit in opcode. No generic decode. */
-#define DstReg (2<<1) /* Register operand. */
-#define DstMem (3<<1) /* Memory operand. */
-#define DstMask (3<<1)
-/* Source operand type. */
-#define SrcNone (0<<3) /* No source operand. */
-#define SrcImplicit (0<<3) /* Source operand is implicit in the opcode. */
-#define SrcReg (1<<3) /* Register operand. */
-#define SrcMem (2<<3) /* Memory operand. */
-#define SrcMem16 (3<<3) /* Memory operand (16-bit). */
-#define SrcImm (4<<3) /* Immediate operand. */
-#define SrcImmByte (5<<3) /* 8-bit sign-extended immediate operand. */
-#define SrcMask (7<<3)
-/* Generic ModRM decode. */
-#define ModRM (1<<6)
-/* Destination is only written; never read. */
-#define Mov (1<<7)
-
-static uint8_t opcode_table[256] = {
- /* 0x00 - 0x07 */
- ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
- ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
- ByteOp|DstReg|SrcImm, DstReg|SrcImm, ImplicitOps, ImplicitOps,
- /* 0x08 - 0x0F */
- ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
- ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
- ByteOp|DstReg|SrcImm, DstReg|SrcImm, ImplicitOps, 0,
- /* 0x10 - 0x17 */
- ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
- ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
- ByteOp|DstReg|SrcImm, DstReg|SrcImm, ImplicitOps, ImplicitOps,
- /* 0x18 - 0x1F */
- ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
- ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
- ByteOp|DstReg|SrcImm, DstReg|SrcImm, ImplicitOps, ImplicitOps,
- /* 0x20 - 0x27 */
- ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
- ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
- ByteOp|DstReg|SrcImm, DstReg|SrcImm, 0, ImplicitOps,
- /* 0x28 - 0x2F */
- ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
- ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
- ByteOp|DstReg|SrcImm, DstReg|SrcImm, 0, ImplicitOps,
- /* 0x30 - 0x37 */
- ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
- ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
- ByteOp|DstReg|SrcImm, DstReg|SrcImm, 0, ImplicitOps,
- /* 0x38 - 0x3F */
- ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
- ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
- ByteOp|DstReg|SrcImm, DstReg|SrcImm, 0, ImplicitOps,
- /* 0x40 - 0x4F */
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- /* 0x50 - 0x5F */
- ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov,
- ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov,
- ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov,
- ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov,
- /* 0x60 - 0x67 */
- ImplicitOps, ImplicitOps, DstReg|SrcMem|ModRM, DstReg|SrcMem16|ModRM|Mov,
- 0, 0, 0, 0,
- /* 0x68 - 0x6F */
- ImplicitOps|Mov, DstReg|SrcImm|ModRM|Mov,
- ImplicitOps|Mov, DstReg|SrcImmByte|ModRM|Mov,
- ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov,
- /* 0x70 - 0x77 */
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- /* 0x78 - 0x7F */
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- /* 0x80 - 0x87 */
- ByteOp|DstMem|SrcImm|ModRM, DstMem|SrcImm|ModRM,
- ByteOp|DstMem|SrcImm|ModRM, DstMem|SrcImmByte|ModRM,
- ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
- ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
- /* 0x88 - 0x8F */
- ByteOp|DstMem|SrcReg|ModRM|Mov, DstMem|SrcReg|ModRM|Mov,
- ByteOp|DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
- DstMem|SrcReg|ModRM|Mov, DstReg|SrcNone|ModRM,
- DstReg|SrcMem|ModRM|Mov, DstMem|SrcNone|ModRM|Mov,
- /* 0x90 - 0x97 */
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- /* 0x98 - 0x9F */
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- /* 0xA0 - 0xA7 */
- ByteOp|ImplicitOps|Mov, ImplicitOps|Mov,
- ByteOp|ImplicitOps|Mov, ImplicitOps|Mov,
- ByteOp|ImplicitOps|Mov, ImplicitOps|Mov,
- ByteOp|ImplicitOps, ImplicitOps,
- /* 0xA8 - 0xAF */
- ByteOp|DstReg|SrcImm, DstReg|SrcImm,
- ByteOp|ImplicitOps|Mov, ImplicitOps|Mov,
- ByteOp|ImplicitOps|Mov, ImplicitOps|Mov,
- ByteOp|ImplicitOps, ImplicitOps,
- /* 0xB0 - 0xB7 */
- ByteOp|DstReg|SrcImm|Mov, ByteOp|DstReg|SrcImm|Mov,
- ByteOp|DstReg|SrcImm|Mov, ByteOp|DstReg|SrcImm|Mov,
- ByteOp|DstReg|SrcImm|Mov, ByteOp|DstReg|SrcImm|Mov,
- ByteOp|DstReg|SrcImm|Mov, ByteOp|DstReg|SrcImm|Mov,
- /* 0xB8 - 0xBF */
- DstReg|SrcImm|Mov, DstReg|SrcImm|Mov, DstReg|SrcImm|Mov, DstReg|SrcImm|Mov,
- DstReg|SrcImm|Mov, DstReg|SrcImm|Mov, DstReg|SrcImm|Mov, DstReg|SrcImm|Mov,
- /* 0xC0 - 0xC7 */
- ByteOp|DstMem|SrcImm|ModRM, DstMem|SrcImmByte|ModRM,
- ImplicitOps, ImplicitOps,
- DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
- ByteOp|DstMem|SrcImm|ModRM|Mov, DstMem|SrcImm|ModRM|Mov,
- /* 0xC8 - 0xCF */
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- /* 0xD0 - 0xD7 */
- ByteOp|DstMem|SrcImplicit|ModRM, DstMem|SrcImplicit|ModRM,
- ByteOp|DstMem|SrcImplicit|ModRM, DstMem|SrcImplicit|ModRM,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- /* 0xD8 - 0xDF */
- 0, ImplicitOps|ModRM|Mov, 0, ImplicitOps|ModRM|Mov,
- 0, ImplicitOps|ModRM|Mov, ImplicitOps|ModRM|Mov, ImplicitOps|ModRM|Mov,
- /* 0xE0 - 0xE7 */
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- /* 0xE8 - 0xEF */
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- /* 0xF0 - 0xF7 */
- 0, ImplicitOps, 0, 0,
- ImplicitOps, ImplicitOps,
- ByteOp|DstMem|SrcNone|ModRM, DstMem|SrcNone|ModRM,
- /* 0xF8 - 0xFF */
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ByteOp|DstMem|SrcNone|ModRM, DstMem|SrcNone|ModRM
-};
-
-static uint8_t twobyte_table[256] = {
- /* 0x00 - 0x07 */
- 0, ImplicitOps|ModRM, 0, 0, 0, 0, ImplicitOps, 0,
- /* 0x08 - 0x0F */
- ImplicitOps, ImplicitOps, 0, 0, 0, ImplicitOps|ModRM, 0, 0,
- /* 0x10 - 0x17 */
- 0, 0, 0, 0, 0, 0, 0, 0,
- /* 0x18 - 0x1F */
- ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM,
- ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM,
- /* 0x20 - 0x27 */
- ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM,
- 0, 0, 0, 0,
- /* 0x28 - 0x2F */
- 0, 0, 0, 0, 0, 0, 0, 0,
- /* 0x30 - 0x37 */
- ImplicitOps, ImplicitOps, ImplicitOps, 0, 0, 0, 0, 0,
- /* 0x38 - 0x3F */
- 0, 0, 0, 0, 0, 0, 0, 0,
- /* 0x40 - 0x47 */
- DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
- DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
- DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
- DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
- /* 0x48 - 0x4F */
- DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
- DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
- DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
- DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
- /* 0x50 - 0x5F */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /* 0x60 - 0x6F */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /* 0x70 - 0x7F */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /* 0x80 - 0x87 */
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- /* 0x88 - 0x8F */
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- /* 0x90 - 0x97 */
- ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
- ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
- ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
- ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
- /* 0x98 - 0x9F */
- ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
- ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
- ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
- ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
- /* 0xA0 - 0xA7 */
- ImplicitOps, ImplicitOps, ImplicitOps, DstBitBase|SrcReg|ModRM,
- DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM, 0, 0,
- /* 0xA8 - 0xAF */
- ImplicitOps, ImplicitOps, 0, DstBitBase|SrcReg|ModRM,
- DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM, 0, DstReg|SrcMem|ModRM,
- /* 0xB0 - 0xB7 */
- ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
- DstReg|SrcMem|ModRM|Mov, DstBitBase|SrcReg|ModRM,
- DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
- ByteOp|DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem16|ModRM|Mov,
- /* 0xB8 - 0xBF */
- 0, 0, DstBitBase|SrcImmByte|ModRM, DstBitBase|SrcReg|ModRM,
- DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
- ByteOp|DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem16|ModRM|Mov,
- /* 0xC0 - 0xC7 */
- ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM, 0, 0,
- 0, 0, 0, ImplicitOps|ModRM,
- /* 0xC8 - 0xCF */
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
- /* 0xD0 - 0xDF */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /* 0xE0 - 0xEF */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /* 0xF0 - 0xFF */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-/* Type, address-of, and value of an instruction's operand. */
-struct operand {
- enum { OP_REG, OP_MEM, OP_IMM, OP_NONE } type;
- unsigned int bytes;
- unsigned long val, orig_val;
- union {
- /* OP_REG: Pointer to register field. */
- unsigned long *reg;
- /* OP_MEM: Segment and offset. */
- struct {
- enum x86_segment seg;
- unsigned long off;
- } mem;
- };
-};
-
-/* MSRs. */
-#define MSR_TSC 0x10
-
-/* Control register flags. */
-#define CR0_PE (1<<0)
-#define CR4_TSD (1<<2)
-
-/* EFLAGS bit definitions. */
-#define EFLG_VIP (1<<20)
-#define EFLG_VIF (1<<19)
-#define EFLG_AC (1<<18)
-#define EFLG_VM (1<<17)
-#define EFLG_RF (1<<16)
-#define EFLG_NT (1<<14)
-#define EFLG_IOPL (3<<12)
-#define EFLG_OF (1<<11)
-#define EFLG_DF (1<<10)
-#define EFLG_IF (1<<9)
-#define EFLG_TF (1<<8)
-#define EFLG_SF (1<<7)
-#define EFLG_ZF (1<<6)
-#define EFLG_AF (1<<4)
-#define EFLG_PF (1<<2)
-#define EFLG_CF (1<<0)
-
-/* Exception definitions. */
-#define EXC_DE 0
-#define EXC_DB 1
-#define EXC_BP 3
-#define EXC_OF 4
-#define EXC_BR 5
-#define EXC_UD 6
-#define EXC_TS 10
-#define EXC_NP 11
-#define EXC_SS 12
-#define EXC_GP 13
-#define EXC_PF 14
-#define EXC_MF 16
-
-/*
- * Instruction emulation:
- * Most instructions are emulated directly via a fragment of inline assembly
- * code. This allows us to save/restore EFLAGS and thus very easily pick up
- * any modified flags.
- */
-
-#if defined(__x86_64__)
-#define _LO32 "k" /* force 32-bit operand */
-#define _STK "%%rsp" /* stack pointer */
-#define _BYTES_PER_LONG "8"
-#elif defined(__i386__)
-#define _LO32 "" /* force 32-bit operand */
-#define _STK "%%esp" /* stack pointer */
-#define _BYTES_PER_LONG "4"
-#endif
-
-/*
- * These EFLAGS bits are restored from saved value during emulation, and
- * any changes are written back to the saved value after emulation.
- */
-#define EFLAGS_MASK (EFLG_OF|EFLG_SF|EFLG_ZF|EFLG_AF|EFLG_PF|EFLG_CF)
-
-/* Before executing instruction: restore necessary bits in EFLAGS. */
-#define _PRE_EFLAGS(_sav, _msk, _tmp) \
-/* EFLAGS = (_sav & _msk) | (EFLAGS & ~_msk); _sav &= ~_msk; */ \
-"movl %"_sav",%"_LO32 _tmp"; " \
-"push %"_tmp"; " \
-"push %"_tmp"; " \
-"movl %"_msk",%"_LO32 _tmp"; " \
-"andl %"_LO32 _tmp",("_STK"); " \
-"pushf; " \
-"notl %"_LO32 _tmp"; " \
-"andl %"_LO32 _tmp",("_STK"); " \
-"andl %"_LO32 _tmp",2*"_BYTES_PER_LONG"("_STK"); " \
-"pop %"_tmp"; " \
-"orl %"_LO32 _tmp",("_STK"); " \
-"popf; " \
-"pop %"_sav"; "
-
-/* After executing instruction: write-back necessary bits in EFLAGS. */
-#define _POST_EFLAGS(_sav, _msk, _tmp) \
-/* _sav |= EFLAGS & _msk; */ \
-"pushf; " \
-"pop %"_tmp"; " \
-"andl %"_msk",%"_LO32 _tmp"; " \
-"orl %"_LO32 _tmp",%"_sav"; "
-
-/* Raw emulation: instruction has two explicit operands. */
-#define __emulate_2op_nobyte(_op,_src,_dst,_eflags,_wx,_wy,_lx,_ly,_qx,_qy)\
-do{ unsigned long _tmp; \
- switch ( (_dst).bytes ) \
- { \
- case 2: \
- asm volatile ( \
- _PRE_EFLAGS("0","4","2") \
- _op"w %"_wx"3,%1; " \
- _POST_EFLAGS("0","4","2") \
- : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
- : _wy ((_src).val), "i" (EFLAGS_MASK), \
- "m" (_eflags), "m" ((_dst).val) ); \
- break; \
- case 4: \
- asm volatile ( \
- _PRE_EFLAGS("0","4","2") \
- _op"l %"_lx"3,%1; " \
- _POST_EFLAGS("0","4","2") \
- : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
- : _ly ((_src).val), "i" (EFLAGS_MASK), \
- "m" (_eflags), "m" ((_dst).val) ); \
- break; \
- case 8: \
- __emulate_2op_8byte(_op, _src, _dst, _eflags, _qx, _qy); \
- break; \
- } \
-} while (0)
-#define __emulate_2op(_op,_src,_dst,_eflags,_bx,_by,_wx,_wy,_lx,_ly,_qx,_qy)\
-do{ unsigned long _tmp; \
- switch ( (_dst).bytes ) \
- { \
- case 1: \
- asm volatile ( \
- _PRE_EFLAGS("0","4","2") \
- _op"b %"_bx"3,%1; " \
- _POST_EFLAGS("0","4","2") \
- : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
- : _by ((_src).val), "i" (EFLAGS_MASK), \
- "m" (_eflags), "m" ((_dst).val) ); \
- break; \
- default: \
- __emulate_2op_nobyte(_op,_src,_dst,_eflags,_wx,_wy,_lx,_ly,_qx,_qy);\
- break; \
- } \
-} while (0)
-/* Source operand is byte-sized and may be restricted to just %cl. */
-#define emulate_2op_SrcB(_op, _src, _dst, _eflags) \
- __emulate_2op(_op, _src, _dst, _eflags, \
- "b", "c", "b", "c", "b", "c", "b", "c")
-/* Source operand is byte, word, long or quad sized. */
-#define emulate_2op_SrcV(_op, _src, _dst, _eflags) \
- __emulate_2op(_op, _src, _dst, _eflags, \
- "b", "q", "w", "r", _LO32, "r", "", "r")
-/* Source operand is word, long or quad sized. */
-#define emulate_2op_SrcV_nobyte(_op, _src, _dst, _eflags) \
- __emulate_2op_nobyte(_op, _src, _dst, _eflags, \
- "w", "r", _LO32, "r", "", "r")
-
-/* Instruction has only one explicit operand (no source operand). */
-#define emulate_1op(_op,_dst,_eflags) \
-do{ unsigned long _tmp; \
- switch ( (_dst).bytes ) \
- { \
- case 1: \
- asm volatile ( \
- _PRE_EFLAGS("0","3","2") \
- _op"b %1; " \
- _POST_EFLAGS("0","3","2") \
- : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
- : "i" (EFLAGS_MASK), "m" (_eflags), "m" ((_dst).val) ); \
- break; \
- case 2: \
- asm volatile ( \
- _PRE_EFLAGS("0","3","2") \
- _op"w %1; " \
- _POST_EFLAGS("0","3","2") \
- : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
- : "i" (EFLAGS_MASK), "m" (_eflags), "m" ((_dst).val) ); \
- break; \
- case 4: \
- asm volatile ( \
- _PRE_EFLAGS("0","3","2") \
- _op"l %1; " \
- _POST_EFLAGS("0","3","2") \
- : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
- : "i" (EFLAGS_MASK), "m" (_eflags), "m" ((_dst).val) ); \
- break; \
- case 8: \
- __emulate_1op_8byte(_op, _dst, _eflags); \
- break; \
- } \
-} while (0)
-
-/* Emulate an instruction with quadword operands (x86/64 only). */
-#if defined(__x86_64__)
-#define __emulate_2op_8byte(_op, _src, _dst, _eflags, _qx, _qy) \
-do{ asm volatile ( \
- _PRE_EFLAGS("0","4","2") \
- _op"q %"_qx"3,%1; " \
- _POST_EFLAGS("0","4","2") \
- : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
- : _qy ((_src).val), "i" (EFLAGS_MASK), \
- "m" (_eflags), "m" ((_dst).val) ); \
-} while (0)
-#define __emulate_1op_8byte(_op, _dst, _eflags) \
-do{ asm volatile ( \
- _PRE_EFLAGS("0","3","2") \
- _op"q %1; " \
- _POST_EFLAGS("0","3","2") \
- : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
- : "i" (EFLAGS_MASK), "m" (_eflags), "m" ((_dst).val) ); \
-} while (0)
-#elif defined(__i386__)
-#define __emulate_2op_8byte(_op, _src, _dst, _eflags, _qx, _qy)
-#define __emulate_1op_8byte(_op, _dst, _eflags)
-#endif /* __i386__ */
-
-#ifdef __XEN__
#define __emulate_fpu_insn(_op) \
do{ int _exn; \
asm volatile ( \
@@ -495,2984 +29,5 @@ do{ int _exn;
: "=r" (_exn) : "0" (0) ); \
generate_exception_if(_exn, EXC_MF, -1); \
} while (0)
-#else
-#define __emulate_fpu_insn(_op) \
-do{ rc = X86EMUL_UNHANDLEABLE; \
- goto done; \
-} while (0)
-#endif
-
-/* Fetch next part of the instruction being emulated. */
-#define insn_fetch_bytes(_size) \
-({ unsigned long _x, _eip = _regs.eip; \
- if ( !mode_64bit() ) _eip = (uint32_t)_eip; /* ignore upper dword */ \
- _regs.eip += (_size); /* real hardware doesn't truncate */ \
- generate_exception_if((uint8_t)(_regs.eip - ctxt->regs->eip) > 15, \
- EXC_GP, 0); \
- rc = ops->insn_fetch(x86_seg_cs, _eip, &_x, (_size), ctxt); \
- if ( rc ) goto done; \
- _x; \
-})
-#define insn_fetch_type(_type) ((_type)insn_fetch_bytes(sizeof(_type)))
-
-#define truncate_word(ea, byte_width) \
-({ unsigned long __ea = (ea); \
- unsigned int _width = (byte_width); \
- ((_width == sizeof(unsigned long)) ? __ea : \
- (__ea & ((1UL << (_width << 3)) - 1))); \
-})
-#define truncate_ea(ea) truncate_word((ea), ad_bytes)
-
-#define mode_64bit() (def_ad_bytes == 8)
-
-#define fail_if(p) \
-do { \
- rc = (p) ? X86EMUL_UNHANDLEABLE : X86EMUL_OKAY; \
- if ( rc ) goto done; \
-} while (0)
-
-#define generate_exception_if(p, e, ec) \
-({ if ( (p) ) { \
- fail_if(ops->inject_hw_exception == NULL); \
- rc = ops->inject_hw_exception(e, ec, ctxt) ? : X86EMUL_EXCEPTION; \
- goto done; \
- } \
-})
-
-/*
- * Given byte has even parity (even number of 1s)? SDM Vol. 1 Sec. 3.4.3.1,
- * "Status Flags": EFLAGS.PF reflects parity of least-sig. byte of result only.
- */
-static int even_parity(uint8_t v)
-{
- asm ( "test %b0,%b0; setp %b0" : "=a" (v) : "0" (v) );
- return v;
-}
-
-/* Update address held in a register, based on addressing mode. */
-#define _register_address_increment(reg, inc, byte_width) \
-do { \
- int _inc = (inc); /* signed type ensures sign extension to long */ \
- unsigned int _width = (byte_width); \
- if ( _width == sizeof(unsigned long) ) \
- (reg) += _inc; \
- else if ( mode_64bit() ) \
- (reg) = ((reg) + _inc) & ((1UL << (_width << 3)) - 1); \
- else \
- (reg) = ((reg) & ~((1UL << (_width << 3)) - 1)) | \
- (((reg) + _inc) & ((1UL << (_width << 3)) - 1)); \
-} while (0)
-#define register_address_increment(reg, inc) \
- _register_address_increment((reg), (inc), ad_bytes)
-
-#define sp_pre_dec(dec) ({ \
- _register_address_increment(_regs.esp, -(dec), ctxt->sp_size/8); \
- truncate_word(_regs.esp, ctxt->sp_size/8); \
-})
-#define sp_post_inc(inc) ({ \
- unsigned long __esp = truncate_word(_regs.esp, ctxt->sp_size/8); \
- _register_address_increment(_regs.esp, (inc), ctxt->sp_size/8); \
- __esp; \
-})
-
-#define jmp_rel(rel) \
-do { \
- int _rel = (int)(rel); \
- _regs.eip += _rel; \
- if ( !mode_64bit() ) \
- _regs.eip = ((op_bytes == 2) \
- ? (uint16_t)_regs.eip : (uint32_t)_regs.eip); \
-} while (0)
-
-static unsigned long __get_rep_prefix(
- struct cpu_user_regs *int_regs,
- struct cpu_user_regs *ext_regs,
- int ad_bytes)
-{
- unsigned long ecx = ((ad_bytes == 2) ? (uint16_t)int_regs->ecx :
- (ad_bytes == 4) ? (uint32_t)int_regs->ecx :
- int_regs->ecx);
-
- /* Skip the instruction if no repetitions are required. */
- if ( ecx == 0 )
- ext_regs->eip = int_regs->eip;
-
- return ecx;
-}
-
-#define get_rep_prefix() ({ \
- unsigned long max_reps = 1; \
- if ( rep_prefix ) \
- max_reps = __get_rep_prefix(&_regs, ctxt->regs, ad_bytes); \
- if ( max_reps == 0 ) \
- goto done; \
- max_reps; \
-})
-
-static void __put_rep_prefix(
- struct cpu_user_regs *int_regs,
- struct cpu_user_regs *ext_regs,
- int ad_bytes,
- unsigned long reps_completed)
-{
- unsigned long ecx = ((ad_bytes == 2) ? (uint16_t)int_regs->ecx :
- (ad_bytes == 4) ? (uint32_t)int_regs->ecx :
- int_regs->ecx);
-
- /* Reduce counter appropriately, and repeat instruction if non-zero. */
- ecx -= reps_completed;
- if ( ecx != 0 )
- int_regs->eip = ext_regs->eip;
-
- if ( ad_bytes == 2 )
- *(uint16_t *)&int_regs->ecx = ecx;
- else if ( ad_bytes == 4 )
- int_regs->ecx = (uint32_t)ecx;
- else
- int_regs->ecx = ecx;
-}
-
-#define put_rep_prefix(reps_completed) ({ \
- if ( rep_prefix ) \
- __put_rep_prefix(&_regs, ctxt->regs, ad_bytes, reps_completed); \
-})
-
-/*
- * Unsigned multiplication with double-word result.
- * IN: Multiplicand=m[0], Multiplier=m[1]
- * OUT: Return CF/OF (overflow status); Result=m[1]:m[0]
- */
-static int mul_dbl(unsigned long m[2])
-{
- int rc;
- asm ( "mul %4; seto %b2"
- : "=a" (m[0]), "=d" (m[1]), "=q" (rc)
- : "0" (m[0]), "1" (m[1]), "2" (0) );
- return rc;
-}
-
-/*
- * Signed multiplication with double-word result.
- * IN: Multiplicand=m[0], Multiplier=m[1]
- * OUT: Return CF/OF (overflow status); Result=m[1]:m[0]
- */
-static int imul_dbl(unsigned long m[2])
-{
- int rc;
- asm ( "imul %4; seto %b2"
- : "=a" (m[0]), "=d" (m[1]), "=q" (rc)
- : "0" (m[0]), "1" (m[1]), "2" (0) );
- return rc;
-}
-
-/*
- * Unsigned division of double-word dividend.
- * IN: Dividend=u[1]:u[0], Divisor=v
- * OUT: Return 1: #DE
- * Return 0: Quotient=u[0], Remainder=u[1]
- */
-static int div_dbl(unsigned long u[2], unsigned long v)
-{
- if ( (v == 0) || (u[1] >= v) )
- return 1;
- asm ( "div %4"
- : "=a" (u[0]), "=d" (u[1])
- : "0" (u[0]), "1" (u[1]), "r" (v) );
- return 0;
-}
-
-/*
- * Signed division of double-word dividend.
- * IN: Dividend=u[1]:u[0], Divisor=v
- * OUT: Return 1: #DE
- * Return 0: Quotient=u[0], Remainder=u[1]
- * NB. We don't use idiv directly as it's moderately hard to work out
- * ahead of time whether it will #DE, which we cannot allow to happen.
- */
-static int idiv_dbl(unsigned long u[2], unsigned long v)
-{
- int negu = (long)u[1] < 0, negv = (long)v < 0;
-
- /* u = abs(u) */
- if ( negu )
- {
- u[1] = ~u[1];
- if ( (u[0] = -u[0]) == 0 )
- u[1]++;
- }
-
- /* abs(u) / abs(v) */
- if ( div_dbl(u, negv ? -v : v) )
- return 1;
-
- /* Remainder has same sign as dividend. It cannot overflow. */
- if ( negu )
- u[1] = -u[1];
-
- /* Quotient is overflowed if sign bit is set. */
- if ( negu ^ negv )
- {
- if ( (long)u[0] >= 0 )
- u[0] = -u[0];
- else if ( (u[0] << 1) != 0 ) /* == 0x80...0 is okay */
- return 1;
- }
- else if ( (long)u[0] < 0 )
- return 1;
-
- return 0;
-}
-
-static int
-test_cc(
- unsigned int condition, unsigned int flags)
-{
- int rc = 0;
-
- switch ( (condition & 15) >> 1 )
- {
- case 0: /* o */
- rc |= (flags & EFLG_OF);
- break;
- case 1: /* b/c/nae */
- rc |= (flags & EFLG_CF);
- break;
- case 2: /* z/e */
- rc |= (flags & EFLG_ZF);
- break;
- case 3: /* be/na */
- rc |= (flags & (EFLG_CF|EFLG_ZF));
- break;
- case 4: /* s */
- rc |= (flags & EFLG_SF);
- break;
- case 5: /* p/pe */
- rc |= (flags & EFLG_PF);
- break;
- case 7: /* le/ng */
- rc |= (flags & EFLG_ZF);
- /* fall through */
- case 6: /* l/nge */
- rc |= (!(flags & EFLG_SF) != !(flags & EFLG_OF));
- break;
- }
-
- /* Odd condition identifiers (lsb == 1) have inverted sense. */
- return (!!rc ^ (condition & 1));
-}
-
-static int
-get_cpl(
- struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops)
-{
- struct segment_register reg;
-
- if ( ctxt->regs->eflags & EFLG_VM )
- return 3;
-
- if ( (ops->read_segment == NULL) ||
- ops->read_segment(x86_seg_ss, ®, ctxt) )
- return -1;
-
- return reg.attr.fields.dpl;
-}
-
-static int
-_mode_iopl(
- struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops)
-{
- int cpl = get_cpl(ctxt, ops);
- if ( cpl == -1 )
- return -1;
- return (cpl <= ((ctxt->regs->eflags >> 12) & 3));
-}
-
-#define mode_ring0() ({ \
- int _cpl = get_cpl(ctxt, ops); \
- fail_if(_cpl < 0); \
- (_cpl == 0); \
-})
-#define mode_iopl() ({ \
- int _iopl = _mode_iopl(ctxt, ops); \
- fail_if(_iopl < 0); \
- _iopl; \
-})
-
-static int ioport_access_check(
- unsigned int first_port,
- unsigned int bytes,
- struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops)
-{
- unsigned long iobmp;
- struct segment_register tr;
- int rc = X86EMUL_OKAY;
-
- if ( !(ctxt->regs->eflags & EFLG_VM) && mode_iopl() )
- return X86EMUL_OKAY;
-
- fail_if(ops->read_segment == NULL);
- if ( (rc = ops->read_segment(x86_seg_tr, &tr, ctxt)) != 0 )
- return rc;
-
- /* Ensure that the TSS is valid and has an io-bitmap-offset field. */
- if ( !tr.attr.fields.p ||
- ((tr.attr.fields.type & 0xd) != 0x9) ||
- (tr.limit < 0x67) )
- goto raise_exception;
-
- if ( (rc = ops->read(x86_seg_none, tr.base + 0x66, &iobmp, 2, ctxt)) )
- return rc;
-
- /* Ensure TSS includes two bytes including byte containing first port. */
- iobmp += first_port / 8;
- if ( tr.limit <= iobmp )
- goto raise_exception;
-
- if ( (rc = ops->read(x86_seg_none, tr.base + iobmp, &iobmp, 2, ctxt)) )
- return rc;
- if ( (iobmp & (((1<<bytes)-1) << (first_port&7))) != 0 )
- goto raise_exception;
-
- done:
- return rc;
-
- raise_exception:
- fail_if(ops->inject_hw_exception == NULL);
- return ops->inject_hw_exception(EXC_GP, 0, ctxt) ? : X86EMUL_EXCEPTION;
-}
-
-static int
-in_realmode(
- struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops)
-{
- unsigned long cr0;
- int rc;
-
- if ( ops->read_cr == NULL )
- return 0;
-
- rc = ops->read_cr(0, &cr0, ctxt);
- return (!rc && !(cr0 & CR0_PE));
-}
-
-static int
-realmode_load_seg(
- enum x86_segment seg,
- uint16_t sel,
- struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops)
-{
- struct segment_register reg;
- int rc;
-
- if ( (rc = ops->read_segment(seg, ®, ctxt)) != 0 )
- return rc;
-
- reg.sel = sel;
- reg.base = (uint32_t)sel << 4;
-
- return ops->write_segment(seg, ®, ctxt);
-}
-
-static int
-protmode_load_seg(
- enum x86_segment seg,
- uint16_t sel,
- struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops)
-{
- struct segment_register desctab, cs, segr;
- struct { uint32_t a, b; } desc;
- unsigned long val;
- uint8_t dpl, rpl, cpl;
- int rc, fault_type = EXC_TS;
-
- /* NULL selector? */
- if ( (sel & 0xfffc) == 0 )
- {
- if ( (seg == x86_seg_cs) || (seg == x86_seg_ss) )
- goto raise_exn;
- memset(&segr, 0, sizeof(segr));
- return ops->write_segment(seg, &segr, ctxt);
- }
-
- /* LDT descriptor must be in the GDT. */
- if ( (seg == x86_seg_ldtr) && (sel & 4) )
- goto raise_exn;
-
- if ( (rc = ops->read_segment(x86_seg_cs, &cs, ctxt)) ||
- (rc = ops->read_segment((sel & 4) ? x86_seg_ldtr : x86_seg_gdtr,
- &desctab, ctxt)) )
- return rc;
-
- /* Check against descriptor table limit. */
- if ( ((sel & 0xfff8) + 7) > desctab.limit )
- goto raise_exn;
-
- do {
- if ( (rc = ops->read(x86_seg_none, desctab.base + (sel & 0xfff8),
- &val, 4, ctxt)) )
- return rc;
- desc.a = val;
- if ( (rc = ops->read(x86_seg_none, desctab.base + (sel & 0xfff8) + 4,
- &val, 4, ctxt)) )
- return rc;
- desc.b = val;
-
- /* Segment present in memory? */
- if ( !(desc.b & (1u<<15)) )
- {
- fault_type = EXC_NP;
- goto raise_exn;
- }
-
- /* LDT descriptor is a system segment. All others are code/data. */
- if ( (desc.b & (1u<<12)) == ((seg == x86_seg_ldtr) << 12) )
- goto raise_exn;
-
- dpl = (desc.b >> 13) & 3;
- rpl = sel & 3;
- cpl = cs.sel & 3;
-
- switch ( seg )
- {
- case x86_seg_cs:
- /* Code segment? */
- if ( !(desc.b & (1u<<11)) )
- goto raise_exn;
- /* Non-conforming segment: check DPL against RPL. */
- if ( ((desc.b & (6u<<9)) != 6) && (dpl != rpl) )
- goto raise_exn;
- break;
- case x86_seg_ss:
- /* Writable data segment? */
- if ( (desc.b & (5u<<9)) != (1u<<9) )
- goto raise_exn;
- if ( (dpl != cpl) || (dpl != rpl) )
- goto raise_exn;
- break;
- case x86_seg_ldtr:
- /* LDT system segment? */
- if ( (desc.b & (15u<<8)) != (2u<<8) )
- goto raise_exn;
- goto skip_accessed_flag;
- default:
- /* Readable code or data segment? */
- if ( (desc.b & (5u<<9)) == (4u<<9) )
- goto raise_exn;
- /* Non-conforming segment: check DPL against RPL and CPL. */
- if ( ((desc.b & (6u<<9)) != 6) && ((dpl < cpl) || (dpl < rpl)) )
- goto raise_exn;
- break;
- }
-
- /* Ensure Accessed flag is set. */
- rc = ((desc.b & 0x100) ? X86EMUL_OKAY :
- ops->cmpxchg(
- x86_seg_none, desctab.base + (sel & 0xfff8) + 4, desc.b,
- desc.b | 0x100, 4, ctxt));
- } while ( rc == X86EMUL_CMPXCHG_FAILED );
-
- if ( rc )
- return rc;
-
- /* Force the Accessed flag in our local copy. */
- desc.b |= 0x100;
-
- skip_accessed_flag:
- segr.base = (((desc.b << 0) & 0xff000000u) |
- ((desc.b << 16) & 0x00ff0000u) |
- ((desc.a >> 16) & 0x0000ffffu));
- segr.attr.bytes = (((desc.b >> 8) & 0x00ffu) |
- ((desc.b >> 12) & 0x0f00u));
- segr.limit = (desc.b & 0x000f0000u) | (desc.a & 0x0000ffffu);
- if ( segr.attr.fields.g )
- segr.limit = (segr.limit << 12) | 0xfffu;
- segr.sel = sel;
- return ops->write_segment(seg, &segr, ctxt);
-
- raise_exn:
- if ( ops->inject_hw_exception == NULL )
- return X86EMUL_UNHANDLEABLE;
- if ( (rc = ops->inject_hw_exception(fault_type, sel & 0xfffc, ctxt)) )
- return rc;
- return X86EMUL_EXCEPTION;
-}
-
-static int
-load_seg(
- enum x86_segment seg,
- uint16_t sel,
- struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops)
-{
- if ( (ops->read_segment == NULL) ||
- (ops->write_segment == NULL) )
- return X86EMUL_UNHANDLEABLE;
-
- if ( in_realmode(ctxt, ops) )
- return realmode_load_seg(seg, sel, ctxt, ops);
-
- return protmode_load_seg(seg, sel, ctxt, ops);
-}
-
-void *
-decode_register(
- uint8_t modrm_reg, struct cpu_user_regs *regs, int highbyte_regs)
-{
- void *p;
-
- switch ( modrm_reg )
- {
- case 0: p = ®s->eax; break;
- case 1: p = ®s->ecx; break;
- case 2: p = ®s->edx; break;
- case 3: p = ®s->ebx; break;
- case 4: p = (highbyte_regs ?
- ((unsigned char *)®s->eax + 1) :
- (unsigned char *)®s->esp); break;
- case 5: p = (highbyte_regs ?
- ((unsigned char *)®s->ecx + 1) :
- (unsigned char *)®s->ebp); break;
- case 6: p = (highbyte_regs ?
- ((unsigned char *)®s->edx + 1) :
- (unsigned char *)®s->esi); break;
- case 7: p = (highbyte_regs ?
- ((unsigned char *)®s->ebx + 1) :
- (unsigned char *)®s->edi); break;
-#if defined(__x86_64__)
- case 8: p = ®s->r8; break;
- case 9: p = ®s->r9; break;
- case 10: p = ®s->r10; break;
- case 11: p = ®s->r11; break;
- case 12: p = ®s->r12; break;
- case 13: p = ®s->r13; break;
- case 14: p = ®s->r14; break;
- case 15: p = ®s->r15; break;
-#endif
- default: p = NULL; break;
- }
-
- return p;
-}
-
-#define decode_segment_failed x86_seg_tr
-enum x86_segment
-decode_segment(
- uint8_t modrm_reg)
-{
- switch ( modrm_reg )
- {
- case 0: return x86_seg_es;
- case 1: return x86_seg_cs;
- case 2: return x86_seg_ss;
- case 3: return x86_seg_ds;
- case 4: return x86_seg_fs;
- case 5: return x86_seg_gs;
- default: break;
- }
- return decode_segment_failed;
-}
-
-int
-x86_emulate(
- struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops)
-{
- /* Shadow copy of register state. Committed on successful emulation. */
- struct cpu_user_regs _regs = *ctxt->regs;
-
- uint8_t b, d, sib, sib_index, sib_base, twobyte = 0, rex_prefix = 0;
- uint8_t modrm = 0, modrm_mod = 0, modrm_reg = 0, modrm_rm = 0;
- unsigned int op_bytes, def_op_bytes, ad_bytes, def_ad_bytes;
-#define REPE_PREFIX 1
-#define REPNE_PREFIX 2
- unsigned int lock_prefix = 0, rep_prefix = 0;
- int override_seg = -1, rc = X86EMUL_OKAY;
- struct operand src, dst;
-
- /* Data operand effective address (usually computed from ModRM). */
- struct operand ea;
-
- /* Default is a memory operand relative to segment DS. */
- ea.type = OP_MEM;
- ea.mem.seg = x86_seg_ds;
- ea.mem.off = 0;
-
- ctxt->retire.byte = 0;
-
- op_bytes = def_op_bytes = ad_bytes = def_ad_bytes = ctxt->addr_size/8;
- if ( op_bytes == 8 )
- {
- op_bytes = def_op_bytes = 4;
-#ifndef __x86_64__
- return X86EMUL_UNHANDLEABLE;
-#endif
- }
-
- /* Prefix bytes. */
- for ( ; ; )
- {
- switch ( b = insn_fetch_type(uint8_t) )
- {
- case 0x66: /* operand-size override */
- op_bytes = def_op_bytes ^ 6;
- break;
- case 0x67: /* address-size override */
- ad_bytes = def_ad_bytes ^ (mode_64bit() ? 12 : 6);
- break;
- case 0x2e: /* CS override */
- override_seg = x86_seg_cs;
- break;
- case 0x3e: /* DS override */
- override_seg = x86_seg_ds;
- break;
- case 0x26: /* ES override */
- override_seg = x86_seg_es;
- break;
- case 0x64: /* FS override */
- override_seg = x86_seg_fs;
- break;
- case 0x65: /* GS override */
- override_seg = x86_seg_gs;
- break;
- case 0x36: /* SS override */
- override_seg = x86_seg_ss;
- break;
- case 0xf0: /* LOCK */
- lock_prefix = 1;
- break;
- case 0xf2: /* REPNE/REPNZ */
- rep_prefix = REPNE_PREFIX;
- break;
- case 0xf3: /* REP/REPE/REPZ */
- rep_prefix = REPE_PREFIX;
- break;
- case 0x40 ... 0x4f: /* REX */
- if ( !mode_64bit() )
- goto done_prefixes;
- rex_prefix = b;
- continue;
- default:
- goto done_prefixes;
- }
-
- /* Any legacy prefix after a REX prefix nullifies its effect. */
- rex_prefix = 0;
- }
- done_prefixes:
-
- if ( rex_prefix & 8 ) /* REX.W */
- op_bytes = 8;
-
- /* Opcode byte(s). */
- d = opcode_table[b];
- if ( d == 0 )
- {
- /* Two-byte opcode? */
- if ( b == 0x0f )
- {
- twobyte = 1;
- b = insn_fetch_type(uint8_t);
- d = twobyte_table[b];
- }
-
- /* Unrecognised? */
- if ( d == 0 )
- goto cannot_emulate;
- }
-
- /* Lock prefix is allowed only on RMW instructions. */
- generate_exception_if((d & Mov) && lock_prefix, EXC_GP, 0);
-
- /* ModRM and SIB bytes. */
- if ( d & ModRM )
- {
- modrm = insn_fetch_type(uint8_t);
- modrm_mod = (modrm & 0xc0) >> 6;
- modrm_reg = ((rex_prefix & 4) << 1) | ((modrm & 0x38) >> 3);
- modrm_rm = modrm & 0x07;
-
- if ( modrm_mod == 3 )
- {
- modrm_rm |= (rex_prefix & 1) << 3;
- ea.type = OP_REG;
- ea.reg = decode_register(
- modrm_rm, &_regs, (d & ByteOp) && (rex_prefix == 0));
- }
- else if ( ad_bytes == 2 )
- {
- /* 16-bit ModR/M decode. */
- switch ( modrm_rm )
- {
- case 0:
- ea.mem.off = _regs.ebx + _regs.esi;
- break;
- case 1:
- ea.mem.off = _regs.ebx + _regs.edi;
- break;
- case 2:
- ea.mem.seg = x86_seg_ss;
- ea.mem.off = _regs.ebp + _regs.esi;
- break;
- case 3:
- ea.mem.seg = x86_seg_ss;
- ea.mem.off = _regs.ebp + _regs.edi;
- break;
- case 4:
- ea.mem.off = _regs.esi;
- break;
- case 5:
- ea.mem.off = _regs.edi;
- break;
- case 6:
- if ( modrm_mod == 0 )
- break;
- ea.mem.seg = x86_seg_ss;
- ea.mem.off = _regs.ebp;
- break;
- case 7:
- ea.mem.off = _regs.ebx;
- break;
- }
- switch ( modrm_mod )
- {
- case 0:
- if ( modrm_rm == 6 )
- ea.mem.off = insn_fetch_type(int16_t);
- break;
- case 1:
- ea.mem.off += insn_fetch_type(int8_t);
- break;
- case 2:
- ea.mem.off += insn_fetch_type(int16_t);
- break;
- }
- ea.mem.off = truncate_ea(ea.mem.off);
- }
- else
- {
- /* 32/64-bit ModR/M decode. */
- if ( modrm_rm == 4 )
- {
- sib = insn_fetch_type(uint8_t);
- sib_index = ((sib >> 3) & 7) | ((rex_prefix << 2) & 8);
- sib_base = (sib & 7) | ((rex_prefix << 3) & 8);
- if ( sib_index != 4 )
- ea.mem.off = *(long*)decode_register(sib_index, &_regs, 0);
- ea.mem.off <<= (sib >> 6) & 3;
- if ( (modrm_mod == 0) && ((sib_base & 7) == 5) )
- ea.mem.off += insn_fetch_type(int32_t);
- else if ( sib_base == 4 )
- {
- ea.mem.seg = x86_seg_ss;
- ea.mem.off += _regs.esp;
- if ( !twobyte && (b == 0x8f) )
- /* POP <rm> computes its EA post increment. */
- ea.mem.off += ((mode_64bit() && (op_bytes == 4))
- ? 8 : op_bytes);
- }
- else if ( sib_base == 5 )
- {
- ea.mem.seg = x86_seg_ss;
- ea.mem.off += _regs.ebp;
- }
- else
- ea.mem.off += *(long*)decode_register(sib_base, &_regs, 0);
- }
- else
- {
- modrm_rm |= (rex_prefix & 1) << 3;
- ea.mem.off = *(long *)decode_register(modrm_rm, &_regs, 0);
- if ( (modrm_rm == 5) && (modrm_mod != 0) )
- ea.mem.seg = x86_seg_ss;
- }
- switch ( modrm_mod )
- {
- case 0:
- if ( (modrm_rm & 7) != 5 )
- break;
- ea.mem.off = insn_fetch_type(int32_t);
- if ( !mode_64bit() )
- break;
- /* Relative to RIP of next instruction. Argh! */
- ea.mem.off += _regs.eip;
- if ( (d & SrcMask) == SrcImm )
- ea.mem.off += (d & ByteOp) ? 1 :
- ((op_bytes == 8) ? 4 : op_bytes);
- else if ( (d & SrcMask) == SrcImmByte )
- ea.mem.off += 1;
- else if ( !twobyte && ((b & 0xfe) == 0xf6) &&
- ((modrm_reg & 7) <= 1) )
- /* Special case in Grp3: test has immediate operand. */
- ea.mem.off += (d & ByteOp) ? 1
- : ((op_bytes == 8) ? 4 : op_bytes);
- else if ( twobyte && ((b & 0xf7) == 0xa4) )
- /* SHLD/SHRD with immediate byte third operand. */
- ea.mem.off++;
- break;
- case 1:
- ea.mem.off += insn_fetch_type(int8_t);
- break;
- case 2:
- ea.mem.off += insn_fetch_type(int32_t);
- break;
- }
- ea.mem.off = truncate_ea(ea.mem.off);
- }
- }
-
- if ( override_seg != -1 )
- ea.mem.seg = override_seg;
-
- /* Special instructions do their own operand decoding. */
- if ( (d & DstMask) == ImplicitOps )
- goto special_insn;
-
- /* Decode and fetch the source operand: register, memory or immediate. */
- switch ( d & SrcMask )
- {
- case SrcNone:
- break;
- case SrcReg:
- src.type = OP_REG;
- if ( d & ByteOp )
- {
- src.reg = decode_register(modrm_reg, &_regs, (rex_prefix == 0));
- src.val = *(uint8_t *)src.reg;
- src.bytes = 1;
- }
- else
- {
- src.reg = decode_register(modrm_reg, &_regs, 0);
- switch ( (src.bytes = op_bytes) )
- {
- case 2: src.val = *(uint16_t *)src.reg; break;
- case 4: src.val = *(uint32_t *)src.reg; break;
- case 8: src.val = *(uint64_t *)src.reg; break;
- }
- }
- break;
- case SrcMem16:
- ea.bytes = 2;
- goto srcmem_common;
- case SrcMem:
- ea.bytes = (d & ByteOp) ? 1 : op_bytes;
- srcmem_common:
- src = ea;
- if ( src.type == OP_REG )
- {
- switch ( src.bytes )
- {
- case 1: src.val = *(uint8_t *)src.reg; break;
- case 2: src.val = *(uint16_t *)src.reg; break;
- case 4: src.val = *(uint32_t *)src.reg; break;
- case 8: src.val = *(uint64_t *)src.reg; break;
- }
- }
- else if ( (rc = ops->read(src.mem.seg, src.mem.off,
- &src.val, src.bytes, ctxt)) )
- goto done;
- break;
- case SrcImm:
- src.type = OP_IMM;
- src.bytes = (d & ByteOp) ? 1 : op_bytes;
- if ( src.bytes == 8 ) src.bytes = 4;
- /* NB. Immediates are sign-extended as necessary. */
- switch ( src.bytes )
- {
- case 1: src.val = insn_fetch_type(int8_t); break;
- case 2: src.val = insn_fetch_type(int16_t); break;
- case 4: src.val = insn_fetch_type(int32_t); break;
- }
- break;
- case SrcImmByte:
- src.type = OP_IMM;
- src.bytes = 1;
- src.val = insn_fetch_type(int8_t);
- break;
- }
-
- /* Decode and fetch the destination operand: register or memory. */
- switch ( d & DstMask )
- {
- case DstReg:
- dst.type = OP_REG;
- if ( d & ByteOp )
- {
- dst.reg = decode_register(modrm_reg, &_regs, (rex_prefix == 0));
- dst.val = *(uint8_t *)dst.reg;
- dst.bytes = 1;
- }
- else
- {
- dst.reg = decode_register(modrm_reg, &_regs, 0);
- switch ( (dst.bytes = op_bytes) )
- {
- case 2: dst.val = *(uint16_t *)dst.reg; break;
- case 4: dst.val = *(uint32_t *)dst.reg; break;
- case 8: dst.val = *(uint64_t *)dst.reg; break;
- }
- }
- break;
- case DstBitBase:
- if ( ((d & SrcMask) == SrcImmByte) || (ea.type == OP_REG) )
- {
- src.val &= (op_bytes << 3) - 1;
- }
- else
- {
- /*
- * EA += BitOffset DIV op_bytes*8
- * BitOffset = BitOffset MOD op_bytes*8
- * DIV truncates towards negative infinity.
- * MOD always produces a positive result.
- */
- if ( op_bytes == 2 )
- src.val = (int16_t)src.val;
- else if ( op_bytes == 4 )
- src.val = (int32_t)src.val;
- if ( (long)src.val < 0 )
- {
- unsigned long byte_offset;
- byte_offset = op_bytes + (((-src.val-1) >> 3) & ~(op_bytes-1));
- ea.mem.off -= byte_offset;
- src.val = (byte_offset << 3) + src.val;
- }
- else
- {
- ea.mem.off += (src.val >> 3) & ~(op_bytes - 1);
- src.val &= (op_bytes << 3) - 1;
- }
- }
- /* Becomes a normal DstMem operation from here on. */
- d = (d & ~DstMask) | DstMem;
- case DstMem:
- ea.bytes = (d & ByteOp) ? 1 : op_bytes;
- dst = ea;
- if ( dst.type == OP_REG )
- {
- switch ( dst.bytes )
- {
- case 1: dst.val = *(uint8_t *)dst.reg; break;
- case 2: dst.val = *(uint16_t *)dst.reg; break;
- case 4: dst.val = *(uint32_t *)dst.reg; break;
- case 8: dst.val = *(uint64_t *)dst.reg; break;
- }
- }
- else if ( !(d & Mov) ) /* optimisation - avoid slow emulated read */
- {
- if ( (rc = ops->read(dst.mem.seg, dst.mem.off,
- &dst.val, dst.bytes, ctxt)) )
- goto done;
- dst.orig_val = dst.val;
- }
- break;
- }
-
- /* LOCK prefix allowed only on instructions with memory destination. */
- generate_exception_if(lock_prefix && (dst.type != OP_MEM), EXC_GP, 0);
-
- if ( twobyte )
- goto twobyte_insn;
-
- switch ( b )
- {
- case 0x04 ... 0x05: /* add imm,%%eax */
- dst.reg = (unsigned long *)&_regs.eax;
- dst.val = _regs.eax;
- case 0x00 ... 0x03: add: /* add */
- emulate_2op_SrcV("add", src, dst, _regs.eflags);
- break;
-
- case 0x0c ... 0x0d: /* or imm,%%eax */
- dst.reg = (unsigned long *)&_regs.eax;
- dst.val = _regs.eax;
- case 0x08 ... 0x0b: or: /* or */
- emulate_2op_SrcV("or", src, dst, _regs.eflags);
- break;
-
- case 0x14 ... 0x15: /* adc imm,%%eax */
- dst.reg = (unsigned long *)&_regs.eax;
- dst.val = _regs.eax;
- case 0x10 ... 0x13: adc: /* adc */
- emulate_2op_SrcV("adc", src, dst, _regs.eflags);
- break;
-
- case 0x1c ... 0x1d: /* sbb imm,%%eax */
- dst.reg = (unsigned long *)&_regs.eax;
- dst.val = _regs.eax;
- case 0x18 ... 0x1b: sbb: /* sbb */
- emulate_2op_SrcV("sbb", src, dst, _regs.eflags);
- break;
-
- case 0x24 ... 0x25: /* and imm,%%eax */
- dst.reg = (unsigned long *)&_regs.eax;
- dst.val = _regs.eax;
- case 0x20 ... 0x23: and: /* and */
- emulate_2op_SrcV("and", src, dst, _regs.eflags);
- break;
-
- case 0x2c ... 0x2d: /* sub imm,%%eax */
- dst.reg = (unsigned long *)&_regs.eax;
- dst.val = _regs.eax;
- case 0x28 ... 0x2b: sub: /* sub */
- emulate_2op_SrcV("sub", src, dst, _regs.eflags);
- break;
-
- case 0x34 ... 0x35: /* xor imm,%%eax */
- dst.reg = (unsigned long *)&_regs.eax;
- dst.val = _regs.eax;
- case 0x30 ... 0x33: xor: /* xor */
- emulate_2op_SrcV("xor", src, dst, _regs.eflags);
- break;
-
- case 0x3c ... 0x3d: /* cmp imm,%%eax */
- dst.reg = (unsigned long *)&_regs.eax;
- dst.val = _regs.eax;
- case 0x38 ... 0x3b: cmp: /* cmp */
- emulate_2op_SrcV("cmp", src, dst, _regs.eflags);
- break;
-
- case 0x62: /* bound */ {
- unsigned long src_val2;
- int lb, ub, idx;
- generate_exception_if(mode_64bit() || (src.type != OP_MEM),
- EXC_UD, -1);
- if ( (rc = ops->read(src.mem.seg, src.mem.off + op_bytes,
- &src_val2, op_bytes, ctxt)) )
- goto done;
- ub = (op_bytes == 2) ? (int16_t)src_val2 : (int32_t)src_val2;
- lb = (op_bytes == 2) ? (int16_t)src.val : (int32_t)src.val;
- idx = (op_bytes == 2) ? (int16_t)dst.val : (int32_t)dst.val;
- generate_exception_if((idx < lb) || (idx > ub), EXC_BR, -1);
- dst.type = OP_NONE;
- break;
- }
-
- case 0x63: /* movsxd (x86/64) / arpl (x86/32) */
- if ( mode_64bit() )
- {
- /* movsxd */
- if ( src.type == OP_REG )
- src.val = *(int32_t *)src.reg;
- else if ( (rc = ops->read(src.mem.seg, src.mem.off,
- &src.val, 4, ctxt)) )
- goto done;
- dst.val = (int32_t)src.val;
- }
- else
- {
- /* arpl */
- uint16_t src_val = dst.val;
- dst = src;
- _regs.eflags &= ~EFLG_ZF;
- _regs.eflags |= ((src_val & 3) > (dst.val & 3)) ? EFLG_ZF : 0;
- if ( _regs.eflags & EFLG_ZF )
- dst.val = (dst.val & ~3) | (src_val & 3);
- else
- dst.type = OP_NONE;
- generate_exception_if(in_realmode(ctxt, ops), EXC_UD, -1);
- }
- break;
-
- case 0x69: /* imul imm16/32 */
- case 0x6b: /* imul imm8 */ {
- unsigned long src1; /* ModR/M source operand */
- if ( ea.type == OP_REG )
- src1 = *ea.reg;
- else if ( (rc = ops->read(ea.mem.seg, ea.mem.off,
- &src1, op_bytes, ctxt)) )
- goto done;
- _regs.eflags &= ~(EFLG_OF|EFLG_CF);
- switch ( dst.bytes )
- {
- case 2:
- dst.val = ((uint32_t)(int16_t)src.val *
- (uint32_t)(int16_t)src1);
- if ( (int16_t)dst.val != (uint32_t)dst.val )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- break;
-#ifdef __x86_64__
- case 4:
- dst.val = ((uint64_t)(int32_t)src.val *
- (uint64_t)(int32_t)src1);
- if ( (int32_t)dst.val != dst.val )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- break;
-#endif
- default: {
- unsigned long m[2] = { src.val, src1 };
- if ( imul_dbl(m) )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- dst.val = m[0];
- break;
- }
- }
- break;
- }
-
- case 0x82: /* Grp1 (x86/32 only) */
- generate_exception_if(mode_64bit(), EXC_UD, -1);
- case 0x80: case 0x81: case 0x83: /* Grp1 */
- switch ( modrm_reg & 7 )
- {
- case 0: goto add;
- case 1: goto or;
- case 2: goto adc;
- case 3: goto sbb;
- case 4: goto and;
- case 5: goto sub;
- case 6: goto xor;
- case 7: goto cmp;
- }
- break;
-
- case 0xa8 ... 0xa9: /* test imm,%%eax */
- dst.reg = (unsigned long *)&_regs.eax;
- dst.val = _regs.eax;
- case 0x84 ... 0x85: test: /* test */
- emulate_2op_SrcV("test", src, dst, _regs.eflags);
- break;
-
- case 0x86 ... 0x87: xchg: /* xchg */
- /* Write back the register source. */
- switch ( dst.bytes )
- {
- case 1: *(uint8_t *)src.reg = (uint8_t)dst.val; break;
- case 2: *(uint16_t *)src.reg = (uint16_t)dst.val; break;
- case 4: *src.reg = (uint32_t)dst.val; break; /* 64b reg: zero-extend */
- case 8: *src.reg = dst.val; break;
- }
- /* Write back the memory destination with implicit LOCK prefix. */
- dst.val = src.val;
- lock_prefix = 1;
- break;
-
- case 0xc6 ... 0xc7: /* mov (sole member of Grp11) */
- generate_exception_if((modrm_reg & 7) != 0, EXC_UD, -1);
- case 0x88 ... 0x8b: /* mov */
- dst.val = src.val;
- break;
-
- case 0x8c: /* mov Sreg,r/m */ {
- struct segment_register reg;
- enum x86_segment seg = decode_segment(modrm_reg);
- generate_exception_if(seg == decode_segment_failed, EXC_UD, -1);
- fail_if(ops->read_segment == NULL);
- if ( (rc = ops->read_segment(seg, ®, ctxt)) != 0 )
- goto done;
- dst.val = reg.sel;
- if ( dst.type == OP_MEM )
- dst.bytes = 2;
- break;
- }
-
- case 0x8e: /* mov r/m,Sreg */ {
- enum x86_segment seg = decode_segment(modrm_reg);
- generate_exception_if(seg == decode_segment_failed, EXC_UD, -1);
- if ( (rc = load_seg(seg, (uint16_t)src.val, ctxt, ops)) != 0 )
- goto done;
- if ( seg == x86_seg_ss )
- ctxt->retire.flags.mov_ss = 1;
- dst.type = OP_NONE;
- break;
- }
-
- case 0x8d: /* lea */
- dst.val = ea.mem.off;
- break;
-
- case 0x8f: /* pop (sole member of Grp1a) */
- generate_exception_if((modrm_reg & 7) != 0, EXC_UD, -1);
- /* 64-bit mode: POP defaults to a 64-bit operand. */
- if ( mode_64bit() && (dst.bytes == 4) )
- dst.bytes = 8;
- if ( (rc = ops->read(x86_seg_ss, sp_post_inc(dst.bytes),
- &dst.val, dst.bytes, ctxt)) != 0 )
- goto done;
- break;
-
- case 0xb0 ... 0xb7: /* mov imm8,r8 */
- dst.reg = decode_register(
- (b & 7) | ((rex_prefix & 1) << 3), &_regs, (rex_prefix == 0));
- dst.val = src.val;
- break;
-
- case 0xb8 ... 0xbf: /* mov imm{16,32,64},r{16,32,64} */
- if ( dst.bytes == 8 ) /* Fetch more bytes to obtain imm64 */
- src.val = ((uint32_t)src.val |
- ((uint64_t)insn_fetch_type(uint32_t) << 32));
- dst.reg = decode_register(
- (b & 7) | ((rex_prefix & 1) << 3), &_regs, 0);
- dst.val = src.val;
- break;
-
- case 0xc0 ... 0xc1: grp2: /* Grp2 */
- switch ( modrm_reg & 7 )
- {
- case 0: /* rol */
- emulate_2op_SrcB("rol", src, dst, _regs.eflags);
- break;
- case 1: /* ror */
- emulate_2op_SrcB("ror", src, dst, _regs.eflags);
- break;
- case 2: /* rcl */
- emulate_2op_SrcB("rcl", src, dst, _regs.eflags);
- break;
- case 3: /* rcr */
- emulate_2op_SrcB("rcr", src, dst, _regs.eflags);
- break;
- case 4: /* sal/shl */
- case 6: /* sal/shl */
- emulate_2op_SrcB("sal", src, dst, _regs.eflags);
- break;
- case 5: /* shr */
- emulate_2op_SrcB("shr", src, dst, _regs.eflags);
- break;
- case 7: /* sar */
- emulate_2op_SrcB("sar", src, dst, _regs.eflags);
- break;
- }
- break;
-
- case 0xc4: /* les */ {
- unsigned long sel;
- dst.val = x86_seg_es;
- les: /* dst.val identifies the segment */
- generate_exception_if(src.type != OP_MEM, EXC_UD, -1);
- if ( (rc = ops->read(src.mem.seg, src.mem.off + src.bytes,
- &sel, 2, ctxt)) != 0 )
- goto done;
- if ( (rc = load_seg(dst.val, (uint16_t)sel, ctxt, ops)) != 0 )
- goto done;
- dst.val = src.val;
- break;
- }
-
- case 0xc5: /* lds */
- dst.val = x86_seg_ds;
- goto les;
-
- case 0xd0 ... 0xd1: /* Grp2 */
- src.val = 1;
- goto grp2;
-
- case 0xd2 ... 0xd3: /* Grp2 */
- src.val = _regs.ecx;
- goto grp2;
-
- case 0xf6 ... 0xf7: /* Grp3 */
- switch ( modrm_reg & 7 )
- {
- case 0 ... 1: /* test */
- /* Special case in Grp3: test has an immediate source operand. */
- src.type = OP_IMM;
- src.bytes = (d & ByteOp) ? 1 : op_bytes;
- if ( src.bytes == 8 ) src.bytes = 4;
- switch ( src.bytes )
- {
- case 1: src.val = insn_fetch_type(int8_t); break;
- case 2: src.val = insn_fetch_type(int16_t); break;
- case 4: src.val = insn_fetch_type(int32_t); break;
- }
- goto test;
- case 2: /* not */
- dst.val = ~dst.val;
- break;
- case 3: /* neg */
- emulate_1op("neg", dst, _regs.eflags);
- break;
- case 4: /* mul */
- src = dst;
- dst.type = OP_REG;
- dst.reg = (unsigned long *)&_regs.eax;
- dst.val = *dst.reg;
- _regs.eflags &= ~(EFLG_OF|EFLG_CF);
- switch ( src.bytes )
- {
- case 1:
- dst.val = (uint8_t)dst.val;
- dst.val *= src.val;
- if ( (uint8_t)dst.val != (uint16_t)dst.val )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- dst.bytes = 2;
- break;
- case 2:
- dst.val = (uint16_t)dst.val;
- dst.val *= src.val;
- if ( (uint16_t)dst.val != (uint32_t)dst.val )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- *(uint16_t *)&_regs.edx = dst.val >> 16;
- break;
-#ifdef __x86_64__
- case 4:
- dst.val = (uint32_t)dst.val;
- dst.val *= src.val;
- if ( (uint32_t)dst.val != dst.val )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- _regs.edx = (uint32_t)(dst.val >> 32);
- break;
-#endif
- default: {
- unsigned long m[2] = { src.val, dst.val };
- if ( mul_dbl(m) )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- _regs.edx = m[1];
- dst.val = m[0];
- break;
- }
- }
- break;
- case 5: /* imul */
- src = dst;
- dst.type = OP_REG;
- dst.reg = (unsigned long *)&_regs.eax;
- dst.val = *dst.reg;
- _regs.eflags &= ~(EFLG_OF|EFLG_CF);
- switch ( src.bytes )
- {
- case 1:
- dst.val = ((uint16_t)(int8_t)src.val *
- (uint16_t)(int8_t)dst.val);
- if ( (int8_t)dst.val != (uint16_t)dst.val )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- dst.bytes = 2;
- break;
- case 2:
- dst.val = ((uint32_t)(int16_t)src.val *
- (uint32_t)(int16_t)dst.val);
- if ( (int16_t)dst.val != (uint32_t)dst.val )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- *(uint16_t *)&_regs.edx = dst.val >> 16;
- break;
-#ifdef __x86_64__
- case 4:
- dst.val = ((uint64_t)(int32_t)src.val *
- (uint64_t)(int32_t)dst.val);
- if ( (int32_t)dst.val != dst.val )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- _regs.edx = (uint32_t)(dst.val >> 32);
- break;
-#endif
- default: {
- unsigned long m[2] = { src.val, dst.val };
- if ( imul_dbl(m) )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- _regs.edx = m[1];
- dst.val = m[0];
- break;
- }
- }
- break;
- case 6: /* div */ {
- unsigned long u[2], v;
- src = dst;
- dst.type = OP_REG;
- dst.reg = (unsigned long *)&_regs.eax;
- switch ( src.bytes )
- {
- case 1:
- u[0] = (uint16_t)_regs.eax;
- u[1] = 0;
- v = (uint8_t)src.val;
- generate_exception_if(
- div_dbl(u, v) || ((uint8_t)u[0] != (uint16_t)u[0]),
- EXC_DE, -1);
- dst.val = (uint8_t)u[0];
- ((uint8_t *)&_regs.eax)[1] = u[1];
- break;
- case 2:
- u[0] = ((uint32_t)_regs.edx << 16) | (uint16_t)_regs.eax;
- u[1] = 0;
- v = (uint16_t)src.val;
- generate_exception_if(
- div_dbl(u, v) || ((uint16_t)u[0] != (uint32_t)u[0]),
- EXC_DE, -1);
- dst.val = (uint16_t)u[0];
- *(uint16_t *)&_regs.edx = u[1];
- break;
-#ifdef __x86_64__
- case 4:
- u[0] = (_regs.edx << 32) | (uint32_t)_regs.eax;
- u[1] = 0;
- v = (uint32_t)src.val;
- generate_exception_if(
- div_dbl(u, v) || ((uint32_t)u[0] != u[0]),
- EXC_DE, -1);
- dst.val = (uint32_t)u[0];
- _regs.edx = (uint32_t)u[1];
- break;
-#endif
- default:
- u[0] = _regs.eax;
- u[1] = _regs.edx;
- v = src.val;
- generate_exception_if(div_dbl(u, v), EXC_DE, -1);
- dst.val = u[0];
- _regs.edx = u[1];
- break;
- }
- break;
- }
- case 7: /* idiv */ {
- unsigned long u[2], v;
- src = dst;
- dst.type = OP_REG;
- dst.reg = (unsigned long *)&_regs.eax;
- switch ( src.bytes )
- {
- case 1:
- u[0] = (int16_t)_regs.eax;
- u[1] = ((long)u[0] < 0) ? ~0UL : 0UL;
- v = (int8_t)src.val;
- generate_exception_if(
- idiv_dbl(u, v) || ((int8_t)u[0] != (int16_t)u[0]),
- EXC_DE, -1);
- dst.val = (int8_t)u[0];
- ((int8_t *)&_regs.eax)[1] = u[1];
- break;
- case 2:
- u[0] = (int32_t)((_regs.edx << 16) | (uint16_t)_regs.eax);
- u[1] = ((long)u[0] < 0) ? ~0UL : 0UL;
- v = (int16_t)src.val;
- generate_exception_if(
- idiv_dbl(u, v) || ((int16_t)u[0] != (int32_t)u[0]),
- EXC_DE, -1);
- dst.val = (int16_t)u[0];
- *(int16_t *)&_regs.edx = u[1];
- break;
-#ifdef __x86_64__
- case 4:
- u[0] = (_regs.edx << 32) | (uint32_t)_regs.eax;
- u[1] = ((long)u[0] < 0) ? ~0UL : 0UL;
- v = (int32_t)src.val;
- generate_exception_if(
- idiv_dbl(u, v) || ((int32_t)u[0] != u[0]),
- EXC_DE, -1);
- dst.val = (int32_t)u[0];
- _regs.edx = (uint32_t)u[1];
- break;
-#endif
- default:
- u[0] = _regs.eax;
- u[1] = _regs.edx;
- v = src.val;
- generate_exception_if(idiv_dbl(u, v), EXC_DE, -1);
- dst.val = u[0];
- _regs.edx = u[1];
- break;
- }
- break;
- }
- default:
- goto cannot_emulate;
- }
- break;
-
- case 0xfe: /* Grp4 */
- generate_exception_if((modrm_reg & 7) >= 2, EXC_UD, -1);
- case 0xff: /* Grp5 */
- switch ( modrm_reg & 7 )
- {
- case 0: /* inc */
- emulate_1op("inc", dst, _regs.eflags);
- break;
- case 1: /* dec */
- emulate_1op("dec", dst, _regs.eflags);
- break;
- case 2: /* call (near) */
- case 4: /* jmp (near) */
- if ( (dst.bytes != 8) && mode_64bit() )
- {
- dst.bytes = op_bytes = 8;
- if ( dst.type == OP_REG )
- dst.val = *dst.reg;
- else if ( (rc = ops->read(dst.mem.seg, dst.mem.off,
- &dst.val, 8, ctxt)) != 0 )
- goto done;
- }
- src.val = _regs.eip;
- _regs.eip = dst.val;
- if ( (modrm_reg & 7) == 2 )
- goto push; /* call */
- dst.type = OP_NONE;
- break;
- case 3: /* call (far, absolute indirect) */
- case 5: /* jmp (far, absolute indirect) */ {
- unsigned long sel;
-
- generate_exception_if(dst.type != OP_MEM, EXC_UD, -1);
-
- if ( (rc = ops->read(dst.mem.seg, dst.mem.off+dst.bytes,
- &sel, 2, ctxt)) )
- goto done;
-
- if ( (modrm_reg & 7) == 3 ) /* call */
- {
- struct segment_register reg;
- fail_if(ops->read_segment == NULL);
- if ( (rc = ops->read_segment(x86_seg_cs, ®, ctxt)) ||
- (rc = ops->write(x86_seg_ss, sp_pre_dec(op_bytes),
- reg.sel, op_bytes, ctxt)) ||
- (rc = ops->write(x86_seg_ss, sp_pre_dec(op_bytes),
- _regs.eip, op_bytes, ctxt)) )
- goto done;
- }
-
- if ( (rc = load_seg(x86_seg_cs, sel, ctxt, ops)) != 0 )
- goto done;
- _regs.eip = dst.val;
-
- dst.type = OP_NONE;
- break;
- }
- case 6: /* push */
- /* 64-bit mode: PUSH defaults to a 64-bit operand. */
- if ( mode_64bit() && (dst.bytes == 4) )
- {
- dst.bytes = 8;
- if ( dst.type == OP_REG )
- dst.val = *dst.reg;
- else if ( (rc = ops->read(dst.mem.seg, dst.mem.off,
- &dst.val, 8, ctxt)) != 0 )
- goto done;
- }
- if ( (rc = ops->write(x86_seg_ss, sp_pre_dec(dst.bytes),
- dst.val, dst.bytes, ctxt)) != 0 )
- goto done;
- dst.type = OP_NONE;
- break;
- case 7:
- generate_exception_if(1, EXC_UD, -1);
- default:
- goto cannot_emulate;
- }
- break;
- }
-
- writeback:
- switch ( dst.type )
- {
- case OP_REG:
- /* The 4-byte case *is* correct: in 64-bit mode we zero-extend. */
- switch ( dst.bytes )
- {
- case 1: *(uint8_t *)dst.reg = (uint8_t)dst.val; break;
- case 2: *(uint16_t *)dst.reg = (uint16_t)dst.val; break;
- case 4: *dst.reg = (uint32_t)dst.val; break; /* 64b: zero-ext */
- case 8: *dst.reg = dst.val; break;
- }
- break;
- case OP_MEM:
- if ( !(d & Mov) && (dst.orig_val == dst.val) &&
- !ctxt->force_writeback )
- /* nothing to do */;
- else if ( lock_prefix )
- rc = ops->cmpxchg(
- dst.mem.seg, dst.mem.off, dst.orig_val,
- dst.val, dst.bytes, ctxt);
- else
- rc = ops->write(
- dst.mem.seg, dst.mem.off, dst.val, dst.bytes, ctxt);
- if ( rc != 0 )
- goto done;
- default:
- break;
- }
-
- /* Commit shadow register state. */
- _regs.eflags &= ~EFLG_RF;
- *ctxt->regs = _regs;
- if ( (_regs.eflags & EFLG_TF) && (rc == X86EMUL_OKAY) &&
- (ops->inject_hw_exception != NULL) )
- rc = ops->inject_hw_exception(EXC_DB, -1, ctxt) ? : X86EMUL_EXCEPTION;
-
- done:
- return rc;
-
- special_insn:
- dst.type = OP_NONE;
-
- /*
- * The only implicit-operands instructions allowed a LOCK prefix are
- * CMPXCHG{8,16}B, MOV CRn, MOV DRn.
- */
- generate_exception_if(lock_prefix &&
- ((b < 0x20) || (b > 0x23)) && /* MOV CRn/DRn */
- (b != 0xc7), /* CMPXCHG{8,16}B */
- EXC_GP, 0);
-
- if ( twobyte )
- goto twobyte_special_insn;
-
- switch ( b )
- {
- case 0x06: /* push %%es */ {
- struct segment_register reg;
- src.val = x86_seg_es;
- push_seg:
- fail_if(ops->read_segment == NULL);
- if ( (rc = ops->read_segment(src.val, ®, ctxt)) != 0 )
- return rc;
- /* 64-bit mode: PUSH defaults to a 64-bit operand. */
- if ( mode_64bit() && (op_bytes == 4) )
- op_bytes = 8;
- if ( (rc = ops->write(x86_seg_ss, sp_pre_dec(op_bytes),
- reg.sel, op_bytes, ctxt)) != 0 )
- goto done;
- break;
- }
-
- case 0x07: /* pop %%es */
- src.val = x86_seg_es;
- pop_seg:
- fail_if(ops->write_segment == NULL);
- /* 64-bit mode: POP defaults to a 64-bit operand. */
- if ( mode_64bit() && (op_bytes == 4) )
- op_bytes = 8;
- if ( (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
- &dst.val, op_bytes, ctxt)) != 0 )
- goto done;
- if ( (rc = load_seg(src.val, (uint16_t)dst.val, ctxt, ops)) != 0 )
- return rc;
- break;
-
- case 0x0e: /* push %%cs */
- src.val = x86_seg_cs;
- goto push_seg;
-
- case 0x16: /* push %%ss */
- src.val = x86_seg_ss;
- goto push_seg;
-
- case 0x17: /* pop %%ss */
- src.val = x86_seg_ss;
- ctxt->retire.flags.mov_ss = 1;
- goto pop_seg;
-
- case 0x1e: /* push %%ds */
- src.val = x86_seg_ds;
- goto push_seg;
-
- case 0x1f: /* pop %%ds */
- src.val = x86_seg_ds;
- goto pop_seg;
-
- case 0x27: /* daa */ {
- uint8_t al = _regs.eax;
- unsigned long eflags = _regs.eflags;
- generate_exception_if(mode_64bit(), EXC_UD, -1);
- _regs.eflags &= ~(EFLG_CF|EFLG_AF);
- if ( ((al & 0x0f) > 9) || (eflags & EFLG_AF) )
- {
- *(uint8_t *)&_regs.eax += 6;
- _regs.eflags |= EFLG_AF;
- }
- if ( (al > 0x99) || (eflags & EFLG_CF) )
- {
- *(uint8_t *)&_regs.eax += 0x60;
- _regs.eflags |= EFLG_CF;
- }
- _regs.eflags &= ~(EFLG_SF|EFLG_ZF|EFLG_PF);
- _regs.eflags |= ((uint8_t)_regs.eax == 0) ? EFLG_ZF : 0;
- _regs.eflags |= (( int8_t)_regs.eax < 0) ? EFLG_SF : 0;
- _regs.eflags |= even_parity(_regs.eax) ? EFLG_PF : 0;
- break;
- }
-
- case 0x2f: /* das */ {
- uint8_t al = _regs.eax;
- unsigned long eflags = _regs.eflags;
- generate_exception_if(mode_64bit(), EXC_UD, -1);
- _regs.eflags &= ~(EFLG_CF|EFLG_AF);
- if ( ((al & 0x0f) > 9) || (eflags & EFLG_AF) )
- {
- _regs.eflags |= EFLG_AF;
- if ( (al < 6) || (eflags & EFLG_CF) )
- _regs.eflags |= EFLG_CF;
- *(uint8_t *)&_regs.eax -= 6;
- }
- if ( (al > 0x99) || (eflags & EFLG_CF) )
- {
- *(uint8_t *)&_regs.eax -= 0x60;
- _regs.eflags |= EFLG_CF;
- }
- _regs.eflags &= ~(EFLG_SF|EFLG_ZF|EFLG_PF);
- _regs.eflags |= ((uint8_t)_regs.eax == 0) ? EFLG_ZF : 0;
- _regs.eflags |= (( int8_t)_regs.eax < 0) ? EFLG_SF : 0;
- _regs.eflags |= even_parity(_regs.eax) ? EFLG_PF : 0;
- break;
- }
-
- case 0x37: /* aaa */
- case 0x3f: /* aas */
- generate_exception_if(mode_64bit(), EXC_UD, -1);
- _regs.eflags &= ~EFLG_CF;
- if ( ((uint8_t)_regs.eax > 9) || (_regs.eflags & EFLG_AF) )
- {
- ((uint8_t *)&_regs.eax)[0] += (b == 0x37) ? 6 : -6;
- ((uint8_t *)&_regs.eax)[1] += (b == 0x37) ? 1 : -1;
- _regs.eflags |= EFLG_CF | EFLG_AF;
- }
- ((uint8_t *)&_regs.eax)[0] &= 0x0f;
- break;
-
- case 0x40 ... 0x4f: /* inc/dec reg */
- dst.type = OP_REG;
- dst.reg = decode_register(b & 7, &_regs, 0);
- dst.bytes = op_bytes;
- dst.val = *dst.reg;
- if ( b & 8 )
- emulate_1op("dec", dst, _regs.eflags);
- else
- emulate_1op("inc", dst, _regs.eflags);
- break;
-
- case 0x50 ... 0x57: /* push reg */
- src.val = *(unsigned long *)decode_register(
- (b & 7) | ((rex_prefix & 1) << 3), &_regs, 0);
- goto push;
-
- case 0x58 ... 0x5f: /* pop reg */
- dst.type = OP_REG;
- dst.reg = decode_register(
- (b & 7) | ((rex_prefix & 1) << 3), &_regs, 0);
- dst.bytes = op_bytes;
- if ( mode_64bit() && (dst.bytes == 4) )
- dst.bytes = 8;
- if ( (rc = ops->read(x86_seg_ss, sp_post_inc(dst.bytes),
- &dst.val, dst.bytes, ctxt)) != 0 )
- goto done;
- break;
-
- case 0x60: /* pusha */ {
- int i;
- unsigned long regs[] = {
- _regs.eax, _regs.ecx, _regs.edx, _regs.ebx,
- _regs.esp, _regs.ebp, _regs.esi, _regs.edi };
- generate_exception_if(mode_64bit(), EXC_UD, -1);
- for ( i = 0; i < 8; i++ )
- if ( (rc = ops->write(x86_seg_ss, sp_pre_dec(op_bytes),
- regs[i], op_bytes, ctxt)) != 0 )
- goto done;
- break;
- }
-
- case 0x61: /* popa */ {
- int i;
- unsigned long dummy_esp, *regs[] = {
- (unsigned long *)&_regs.edi, (unsigned long *)&_regs.esi,
- (unsigned long *)&_regs.ebp, (unsigned long *)&dummy_esp,
- (unsigned long *)&_regs.ebx, (unsigned long *)&_regs.edx,
- (unsigned long *)&_regs.ecx, (unsigned long *)&_regs.eax };
- generate_exception_if(mode_64bit(), EXC_UD, -1);
- for ( i = 0; i < 8; i++ )
- {
- if ( (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
- &dst.val, op_bytes, ctxt)) != 0 )
- goto done;
- switch ( op_bytes )
- {
- case 1: *(uint8_t *)regs[i] = (uint8_t)dst.val; break;
- case 2: *(uint16_t *)regs[i] = (uint16_t)dst.val; break;
- case 4: *regs[i] = (uint32_t)dst.val; break; /* 64b: zero-ext */
- case 8: *regs[i] = dst.val; break;
- }
- }
- break;
- }
-
- case 0x68: /* push imm{16,32,64} */
- src.val = ((op_bytes == 2)
- ? (int32_t)insn_fetch_type(int16_t)
- : insn_fetch_type(int32_t));
- goto push;
-
- case 0x6a: /* push imm8 */
- src.val = insn_fetch_type(int8_t);
- push:
- d |= Mov; /* force writeback */
- dst.type = OP_MEM;
- dst.bytes = op_bytes;
- if ( mode_64bit() && (dst.bytes == 4) )
- dst.bytes = 8;
- dst.val = src.val;
- dst.mem.seg = x86_seg_ss;
- dst.mem.off = sp_pre_dec(dst.bytes);
- break;
-
- case 0x6c ... 0x6d: /* ins %dx,%es:%edi */ {
- unsigned long nr_reps = get_rep_prefix();
- unsigned int port = (uint16_t)_regs.edx;
- dst.bytes = !(b & 1) ? 1 : (op_bytes == 8) ? 4 : op_bytes;
- dst.mem.seg = x86_seg_es;
- dst.mem.off = truncate_ea(_regs.edi);
- if ( (rc = ioport_access_check(port, dst.bytes, ctxt, ops)) != 0 )
- goto done;
- if ( (nr_reps > 1) && (ops->rep_ins != NULL) &&
- ((rc = ops->rep_ins(port, dst.mem.seg, dst.mem.off, dst.bytes,
- &nr_reps, ctxt)) != X86EMUL_UNHANDLEABLE) )
- {
- if ( rc != 0 )
- goto done;
- }
- else
- {
- fail_if(ops->read_io == NULL);
- if ( (rc = ops->read_io(port, dst.bytes, &dst.val, ctxt)) != 0 )
- goto done;
- dst.type = OP_MEM;
- nr_reps = 1;
- }
- register_address_increment(
- _regs.edi,
- nr_reps * ((_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes));
- put_rep_prefix(nr_reps);
- break;
- }
-
- case 0x6e ... 0x6f: /* outs %esi,%dx */ {
- unsigned long nr_reps = get_rep_prefix();
- unsigned int port = (uint16_t)_regs.edx;
- dst.bytes = !(b & 1) ? 1 : (op_bytes == 8) ? 4 : op_bytes;
- if ( (rc = ioport_access_check(port, dst.bytes, ctxt, ops)) != 0 )
- goto done;
- if ( (nr_reps > 1) && (ops->rep_outs != NULL) &&
- ((rc = ops->rep_outs(ea.mem.seg, truncate_ea(_regs.esi),
- port, dst.bytes,
- &nr_reps, ctxt)) != X86EMUL_UNHANDLEABLE) )
- {
- if ( rc != 0 )
- goto done;
- }
- else
- {
- if ( (rc = ops->read(ea.mem.seg, truncate_ea(_regs.esi),
- &dst.val, dst.bytes, ctxt)) != 0 )
- goto done;
- fail_if(ops->write_io == NULL);
- if ( (rc = ops->write_io(port, dst.bytes, dst.val, ctxt)) != 0 )
- goto done;
- nr_reps = 1;
- }
- register_address_increment(
- _regs.esi,
- nr_reps * ((_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes));
- put_rep_prefix(nr_reps);
- break;
- }
-
- case 0x70 ... 0x7f: /* jcc (short) */ {
- int rel = insn_fetch_type(int8_t);
- if ( test_cc(b, _regs.eflags) )
- jmp_rel(rel);
- break;
- }
-
- case 0x90: /* nop / xchg %%r8,%%rax */
- if ( !(rex_prefix & 1) )
- break; /* nop */
-
- case 0x91 ... 0x97: /* xchg reg,%%rax */
- src.type = dst.type = OP_REG;
- src.bytes = dst.bytes = op_bytes;
- src.reg = (unsigned long *)&_regs.eax;
- src.val = *src.reg;
- dst.reg = decode_register(
- (b & 7) | ((rex_prefix & 1) << 3), &_regs, 0);
- dst.val = *dst.reg;
- goto xchg;
-
- case 0x98: /* cbw/cwde/cdqe */
- switch ( op_bytes )
- {
- case 2: *(int16_t *)&_regs.eax = (int8_t)_regs.eax; break; /* cbw */
- case 4: _regs.eax = (uint32_t)(int16_t)_regs.eax; break; /* cwde */
- case 8: _regs.eax = (int32_t)_regs.eax; break; /* cdqe */
- }
- break;
-
- case 0x99: /* cwd/cdq/cqo */
- switch ( op_bytes )
- {
- case 2:
- *(int16_t *)&_regs.edx = ((int16_t)_regs.eax < 0) ? -1 : 0;
- break;
- case 4:
- _regs.edx = (uint32_t)(((int32_t)_regs.eax < 0) ? -1 : 0);
- break;
- case 8:
- _regs.edx = (_regs.eax < 0) ? -1 : 0;
- break;
- }
- break;
-
- case 0x9a: /* call (far, absolute) */ {
- struct segment_register reg;
- uint16_t sel;
- uint32_t eip;
-
- fail_if(ops->read_segment == NULL);
- generate_exception_if(mode_64bit(), EXC_UD, -1);
-
- eip = insn_fetch_bytes(op_bytes);
- sel = insn_fetch_type(uint16_t);
-
- if ( (rc = ops->read_segment(x86_seg_cs, ®, ctxt)) ||
- (rc = ops->write(x86_seg_ss, sp_pre_dec(op_bytes),
- reg.sel, op_bytes, ctxt)) ||
- (rc = ops->write(x86_seg_ss, sp_pre_dec(op_bytes),
- _regs.eip, op_bytes, ctxt)) )
- goto done;
-
- if ( (rc = load_seg(x86_seg_cs, sel, ctxt, ops)) != 0 )
- goto done;
- _regs.eip = eip;
- break;
- }
-
- case 0x9b: /* wait/fwait */
- fail_if(ops->load_fpu_ctxt == NULL);
- ops->load_fpu_ctxt(ctxt);
- __emulate_fpu_insn("fwait");
- break;
-
- case 0x9c: /* pushf */
- src.val = _regs.eflags;
- goto push;
-
- case 0x9d: /* popf */ {
- uint32_t mask = EFLG_VIP | EFLG_VIF | EFLG_VM;
- if ( !mode_ring0() )
- mask |= EFLG_IOPL;
- if ( !mode_iopl() )
- mask |= EFLG_IF;
- /* 64-bit mode: POP defaults to a 64-bit operand. */
- if ( mode_64bit() && (op_bytes == 4) )
- op_bytes = 8;
- if ( (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
- &dst.val, op_bytes, ctxt)) != 0 )
- goto done;
- if ( op_bytes == 2 )
- dst.val = (uint16_t)dst.val | (_regs.eflags & 0xffff0000u);
- dst.val &= 0x257fd5;
- _regs.eflags &= mask;
- _regs.eflags |= (uint32_t)(dst.val & ~mask) | 0x02;
- break;
- }
-
- case 0x9e: /* sahf */
- *(uint8_t *)&_regs.eflags = (((uint8_t *)&_regs.eax)[1] & 0xd7) | 0x02;
- break;
-
- case 0x9f: /* lahf */
- ((uint8_t *)&_regs.eax)[1] = (_regs.eflags & 0xd7) | 0x02;
- break;
-
- case 0xa0 ... 0xa1: /* mov mem.offs,{%al,%ax,%eax,%rax} */
- /* Source EA is not encoded via ModRM. */
- dst.type = OP_REG;
- dst.reg = (unsigned long *)&_regs.eax;
- dst.bytes = (d & ByteOp) ? 1 : op_bytes;
- if ( (rc = ops->read(ea.mem.seg, insn_fetch_bytes(ad_bytes),
- &dst.val, dst.bytes, ctxt)) != 0 )
- goto done;
- break;
-
- case 0xa2 ... 0xa3: /* mov {%al,%ax,%eax,%rax},mem.offs */
- /* Destination EA is not encoded via ModRM. */
- dst.type = OP_MEM;
- dst.mem.seg = ea.mem.seg;
- dst.mem.off = insn_fetch_bytes(ad_bytes);
- dst.bytes = (d & ByteOp) ? 1 : op_bytes;
- dst.val = (unsigned long)_regs.eax;
- break;
-
- case 0xa4 ... 0xa5: /* movs */ {
- unsigned long nr_reps = get_rep_prefix();
- dst.bytes = (d & ByteOp) ? 1 : op_bytes;
- dst.mem.seg = x86_seg_es;
- dst.mem.off = truncate_ea(_regs.edi);
- if ( (nr_reps > 1) && (ops->rep_movs != NULL) &&
- ((rc = ops->rep_movs(ea.mem.seg, truncate_ea(_regs.esi),
- dst.mem.seg, dst.mem.off, dst.bytes,
- &nr_reps, ctxt)) != X86EMUL_UNHANDLEABLE) )
- {
- if ( rc != 0 )
- goto done;
- }
- else
- {
- if ( (rc = ops->read(ea.mem.seg, truncate_ea(_regs.esi),
- &dst.val, dst.bytes, ctxt)) != 0 )
- goto done;
- dst.type = OP_MEM;
- nr_reps = 1;
- }
- register_address_increment(
- _regs.esi,
- nr_reps * ((_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes));
- register_address_increment(
- _regs.edi,
- nr_reps * ((_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes));
- put_rep_prefix(nr_reps);
- break;
- }
-
- case 0xa6 ... 0xa7: /* cmps */ {
- unsigned long next_eip = _regs.eip;
- get_rep_prefix();
- src.bytes = dst.bytes = (d & ByteOp) ? 1 : op_bytes;
- if ( (rc = ops->read(ea.mem.seg, truncate_ea(_regs.esi),
- &dst.val, dst.bytes, ctxt)) ||
- (rc = ops->read(x86_seg_es, truncate_ea(_regs.edi),
- &src.val, src.bytes, ctxt)) )
- goto done;
- register_address_increment(
- _regs.esi, (_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes);
- register_address_increment(
- _regs.edi, (_regs.eflags & EFLG_DF) ? -src.bytes : src.bytes);
- put_rep_prefix(1);
- /* cmp: dst - src ==> src=*%%edi,dst=*%%esi ==> *%%esi - *%%edi */
- emulate_2op_SrcV("cmp", src, dst, _regs.eflags);
- if ( ((rep_prefix == REPE_PREFIX) && !(_regs.eflags & EFLG_ZF)) ||
- ((rep_prefix == REPNE_PREFIX) && (_regs.eflags & EFLG_ZF)) )
- _regs.eip = next_eip;
- break;
- }
-
- case 0xaa ... 0xab: /* stos */ {
- /* unsigned long max_reps = */get_rep_prefix();
- dst.type = OP_MEM;
- dst.bytes = (d & ByteOp) ? 1 : op_bytes;
- dst.mem.seg = x86_seg_es;
- dst.mem.off = truncate_ea(_regs.edi);
- dst.val = _regs.eax;
- register_address_increment(
- _regs.edi, (_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes);
- put_rep_prefix(1);
- break;
- }
-
- case 0xac ... 0xad: /* lods */ {
- /* unsigned long max_reps = */get_rep_prefix();
- dst.type = OP_REG;
- dst.bytes = (d & ByteOp) ? 1 : op_bytes;
- dst.reg = (unsigned long *)&_regs.eax;
- if ( (rc = ops->read(ea.mem.seg, truncate_ea(_regs.esi),
- &dst.val, dst.bytes, ctxt)) != 0 )
- goto done;
- register_address_increment(
- _regs.esi, (_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes);
- put_rep_prefix(1);
- break;
- }
-
- case 0xae ... 0xaf: /* scas */ {
- unsigned long next_eip = _regs.eip;
- get_rep_prefix();
- src.bytes = dst.bytes = (d & ByteOp) ? 1 : op_bytes;
- dst.val = _regs.eax;
- if ( (rc = ops->read(x86_seg_es, truncate_ea(_regs.edi),
- &src.val, src.bytes, ctxt)) != 0 )
- goto done;
- register_address_increment(
- _regs.edi, (_regs.eflags & EFLG_DF) ? -src.bytes : src.bytes);
- put_rep_prefix(1);
- /* cmp: dst - src ==> src=*%%edi,dst=%%eax ==> %%eax - *%%edi */
- emulate_2op_SrcV("cmp", src, dst, _regs.eflags);
- if ( ((rep_prefix == REPE_PREFIX) && !(_regs.eflags & EFLG_ZF)) ||
- ((rep_prefix == REPNE_PREFIX) && (_regs.eflags & EFLG_ZF)) )
- _regs.eip = next_eip;
- break;
- }
-
- case 0xc2: /* ret imm16 (near) */
- case 0xc3: /* ret (near) */ {
- int offset = (b == 0xc2) ? insn_fetch_type(uint16_t) : 0;
- op_bytes = mode_64bit() ? 8 : op_bytes;
- if ( (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes + offset),
- &dst.val, op_bytes, ctxt)) != 0 )
- goto done;
- _regs.eip = dst.val;
- break;
- }
-
- case 0xc8: /* enter imm16,imm8 */ {
- uint16_t size = insn_fetch_type(uint16_t);
- uint8_t depth = insn_fetch_type(uint8_t) & 31;
- int i;
-
- dst.type = OP_REG;
- dst.bytes = (mode_64bit() && (op_bytes == 4)) ? 8 : op_bytes;
- dst.reg = (unsigned long *)&_regs.ebp;
- if ( (rc = ops->write(x86_seg_ss, sp_pre_dec(dst.bytes),
- _regs.ebp, dst.bytes, ctxt)) )
- goto done;
- dst.val = _regs.esp;
-
- if ( depth > 0 )
- {
- for ( i = 1; i < depth; i++ )
- {
- unsigned long ebp, temp_data;
- ebp = truncate_word(_regs.ebp - i*dst.bytes, ctxt->sp_size/8);
- if ( (rc = ops->read(x86_seg_ss, ebp,
- &temp_data, dst.bytes, ctxt)) ||
- (rc = ops->write(x86_seg_ss, sp_pre_dec(dst.bytes),
- temp_data, dst.bytes, ctxt)) )
- goto done;
- }
- if ( (rc = ops->write(x86_seg_ss, sp_pre_dec(dst.bytes),
- dst.val, dst.bytes, ctxt)) )
- goto done;
- }
-
- sp_pre_dec(size);
- break;
- }
-
- case 0xc9: /* leave */
- /* First writeback, to %%esp. */
- dst.type = OP_REG;
- dst.bytes = (mode_64bit() && (op_bytes == 4)) ? 8 : op_bytes;
- dst.reg = (unsigned long *)&_regs.esp;
- dst.val = _regs.ebp;
-
- /* Flush first writeback, since there is a second. */
- switch ( dst.bytes )
- {
- case 1: *(uint8_t *)dst.reg = (uint8_t)dst.val; break;
- case 2: *(uint16_t *)dst.reg = (uint16_t)dst.val; break;
- case 4: *dst.reg = (uint32_t)dst.val; break; /* 64b: zero-ext */
- case 8: *dst.reg = dst.val; break;
- }
-
- /* Second writeback, to %%ebp. */
- dst.reg = (unsigned long *)&_regs.ebp;
- if ( (rc = ops->read(x86_seg_ss, sp_post_inc(dst.bytes),
- &dst.val, dst.bytes, ctxt)) )
- goto done;
- break;
-
- case 0xca: /* ret imm16 (far) */
- case 0xcb: /* ret (far) */ {
- int offset = (b == 0xca) ? insn_fetch_type(uint16_t) : 0;
- op_bytes = mode_64bit() ? 8 : op_bytes;
- if ( (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
- &dst.val, op_bytes, ctxt)) ||
- (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes + offset),
- &src.val, op_bytes, ctxt)) ||
- (rc = load_seg(x86_seg_cs, (uint16_t)src.val, ctxt, ops)) )
- goto done;
- _regs.eip = dst.val;
- break;
- }
-
- case 0xcc: /* int3 */
- src.val = EXC_BP;
- goto swint;
-
- case 0xcd: /* int imm8 */
- src.val = insn_fetch_type(uint8_t);
- swint:
- fail_if(ops->inject_sw_interrupt == NULL);
- rc = ops->inject_sw_interrupt(src.val, _regs.eip - ctxt->regs->eip,
- ctxt) ? : X86EMUL_EXCEPTION;
- goto done;
-
- case 0xce: /* into */
- generate_exception_if(mode_64bit(), EXC_UD, -1);
- if ( !(_regs.eflags & EFLG_OF) )
- break;
- src.val = EXC_OF;
- goto swint;
-
- case 0xcf: /* iret */ {
- unsigned long cs, eip, eflags;
- uint32_t mask = EFLG_VIP | EFLG_VIF | EFLG_VM;
- if ( !mode_ring0() )
- mask |= EFLG_IOPL;
- if ( !mode_iopl() )
- mask |= EFLG_IF;
- fail_if(!in_realmode(ctxt, ops));
- if ( (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
- &eip, op_bytes, ctxt)) ||
- (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
- &cs, op_bytes, ctxt)) ||
- (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
- &eflags, op_bytes, ctxt)) )
- goto done;
- if ( op_bytes == 2 )
- eflags = (uint16_t)eflags | (_regs.eflags & 0xffff0000u);
- eflags &= 0x257fd5;
- _regs.eflags &= mask;
- _regs.eflags |= (uint32_t)(eflags & ~mask) | 0x02;
- _regs.eip = eip;
- if ( (rc = load_seg(x86_seg_cs, (uint16_t)cs, ctxt, ops)) != 0 )
- goto done;
- break;
- }
-
- case 0xd4: /* aam */ {
- unsigned int base = insn_fetch_type(uint8_t);
- uint8_t al = _regs.eax;
- generate_exception_if(mode_64bit(), EXC_UD, -1);
- generate_exception_if(base == 0, EXC_DE, -1);
- *(uint16_t *)&_regs.eax = ((al / base) << 8) | (al % base);
- _regs.eflags &= ~(EFLG_SF|EFLG_ZF|EFLG_PF);
- _regs.eflags |= ((uint8_t)_regs.eax == 0) ? EFLG_ZF : 0;
- _regs.eflags |= (( int8_t)_regs.eax < 0) ? EFLG_SF : 0;
- _regs.eflags |= even_parity(_regs.eax) ? EFLG_PF : 0;
- break;
- }
-
- case 0xd5: /* aad */ {
- unsigned int base = insn_fetch_type(uint8_t);
- uint16_t ax = _regs.eax;
- generate_exception_if(mode_64bit(), EXC_UD, -1);
- *(uint16_t *)&_regs.eax = (uint8_t)(ax + ((ax >> 8) * base));
- _regs.eflags &= ~(EFLG_SF|EFLG_ZF|EFLG_PF);
- _regs.eflags |= ((uint8_t)_regs.eax == 0) ? EFLG_ZF : 0;
- _regs.eflags |= (( int8_t)_regs.eax < 0) ? EFLG_SF : 0;
- _regs.eflags |= even_parity(_regs.eax) ? EFLG_PF : 0;
- break;
- }
-
- case 0xd6: /* salc */
- generate_exception_if(mode_64bit(), EXC_UD, -1);
- *(uint8_t *)&_regs.eax = (_regs.eflags & EFLG_CF) ? 0xff : 0x00;
- break;
-
- case 0xd7: /* xlat */ {
- unsigned long al = (uint8_t)_regs.eax;
- if ( (rc = ops->read(ea.mem.seg, truncate_ea(_regs.ebx + al),
- &al, 1, ctxt)) != 0 )
- goto done;
- *(uint8_t *)&_regs.eax = al;
- break;
- }
-
- case 0xd9: /* FPU 0xd9 */
- fail_if(ops->load_fpu_ctxt == NULL);
- ops->load_fpu_ctxt(ctxt);
- switch ( modrm )
- {
- case 0xc0: __emulate_fpu_insn(".byte 0xd9,0xc0"); break;
- case 0xc1: __emulate_fpu_insn(".byte 0xd9,0xc1"); break;
- case 0xc2: __emulate_fpu_insn(".byte 0xd9,0xc2"); break;
- case 0xc3: __emulate_fpu_insn(".byte 0xd9,0xc3"); break;
- case 0xc4: __emulate_fpu_insn(".byte 0xd9,0xc4"); break;
- case 0xc5: __emulate_fpu_insn(".byte 0xd9,0xc5"); break;
- case 0xc6: __emulate_fpu_insn(".byte 0xd9,0xc6"); break;
- case 0xc7: __emulate_fpu_insn(".byte 0xd9,0xc7"); break;
- case 0xe0: __emulate_fpu_insn(".byte 0xd9,0xe0"); break;
- case 0xe8: __emulate_fpu_insn(".byte 0xd9,0xe8"); break;
- case 0xee: __emulate_fpu_insn(".byte 0xd9,0xee"); break;
- default:
- fail_if((modrm_reg & 7) != 7);
- fail_if(modrm >= 0xc0);
- /* fnstcw m2byte */
- ea.bytes = 2;
- dst = ea;
- asm volatile ( "fnstcw %0" : "=m" (dst.val) );
- }
- break;
-
- case 0xdb: /* FPU 0xdb */
- fail_if(ops->load_fpu_ctxt == NULL);
- ops->load_fpu_ctxt(ctxt);
- fail_if(modrm != 0xe3);
- /* fninit */
- asm volatile ( "fninit" );
- break;
-
- case 0xdd: /* FPU 0xdd */
- fail_if(ops->load_fpu_ctxt == NULL);
- ops->load_fpu_ctxt(ctxt);
- fail_if((modrm_reg & 7) != 7);
- fail_if(modrm >= 0xc0);
- /* fnstsw m2byte */
- ea.bytes = 2;
- dst = ea;
- asm volatile ( "fnstsw %0" : "=m" (dst.val) );
- break;
-
- case 0xde: /* FPU 0xde */
- fail_if(ops->load_fpu_ctxt == NULL);
- ops->load_fpu_ctxt(ctxt);
- switch ( modrm )
- {
- case 0xd9: __emulate_fpu_insn(".byte 0xde,0xd9"); break;
- case 0xf8: __emulate_fpu_insn(".byte 0xde,0xf8"); break;
- case 0xf9: __emulate_fpu_insn(".byte 0xde,0xf9"); break;
- case 0xfa: __emulate_fpu_insn(".byte 0xde,0xfa"); break;
- case 0xfb: __emulate_fpu_insn(".byte 0xde,0xfb"); break;
- case 0xfc: __emulate_fpu_insn(".byte 0xde,0xfc"); break;
- case 0xfd: __emulate_fpu_insn(".byte 0xde,0xfd"); break;
- case 0xfe: __emulate_fpu_insn(".byte 0xde,0xfe"); break;
- case 0xff: __emulate_fpu_insn(".byte 0xde,0xff"); break;
- default: goto cannot_emulate;
- }
- break;
-
- case 0xdf: /* FPU 0xdf */
- fail_if(ops->load_fpu_ctxt == NULL);
- ops->load_fpu_ctxt(ctxt);
- fail_if(modrm != 0xe0);
- /* fnstsw %ax */
- dst.bytes = 2;
- dst.type = OP_REG;
- dst.reg = (unsigned long *)&_regs.eax;
- asm volatile ( "fnstsw %0" : "=m" (dst.val) );
- break;
-
- case 0xe0 ... 0xe2: /* loop{,z,nz} */ {
- int rel = insn_fetch_type(int8_t);
- int do_jmp = !(_regs.eflags & EFLG_ZF); /* loopnz */
- if ( b == 0xe1 )
- do_jmp = !do_jmp; /* loopz */
- else if ( b == 0xe2 )
- do_jmp = 1; /* loop */
- switch ( ad_bytes )
- {
- case 2:
- do_jmp &= --(*(uint16_t *)&_regs.ecx) != 0;
- break;
- case 4:
- do_jmp &= --(*(uint32_t *)&_regs.ecx) != 0;
- _regs.ecx = (uint32_t)_regs.ecx; /* zero extend in x86/64 mode */
- break;
- default: /* case 8: */
- do_jmp &= --_regs.ecx != 0;
- break;
- }
- if ( do_jmp )
- jmp_rel(rel);
- break;
- }
-
- case 0xe3: /* jcxz/jecxz (short) */ {
- int rel = insn_fetch_type(int8_t);
- if ( (ad_bytes == 2) ? !(uint16_t)_regs.ecx :
- (ad_bytes == 4) ? !(uint32_t)_regs.ecx : !_regs.ecx )
- jmp_rel(rel);
- break;
- }
-
- case 0xe4: /* in imm8,%al */
- case 0xe5: /* in imm8,%eax */
- case 0xe6: /* out %al,imm8 */
- case 0xe7: /* out %eax,imm8 */
- case 0xec: /* in %dx,%al */
- case 0xed: /* in %dx,%eax */
- case 0xee: /* out %al,%dx */
- case 0xef: /* out %eax,%dx */ {
- unsigned int port = ((b < 0xe8)
- ? insn_fetch_type(uint8_t)
- : (uint16_t)_regs.edx);
- op_bytes = !(b & 1) ? 1 : (op_bytes == 8) ? 4 : op_bytes;
- if ( (rc = ioport_access_check(port, op_bytes, ctxt, ops)) != 0 )
- goto done;
- if ( b & 2 )
- {
- /* out */
- fail_if(ops->write_io == NULL);
- rc = ops->write_io(port, op_bytes, _regs.eax, ctxt);
-
- }
- else
- {
- /* in */
- dst.type = OP_REG;
- dst.bytes = op_bytes;
- dst.reg = (unsigned long *)&_regs.eax;
- fail_if(ops->read_io == NULL);
- rc = ops->read_io(port, dst.bytes, &dst.val, ctxt);
- }
- if ( rc != 0 )
- goto done;
- break;
- }
-
- case 0xe8: /* call (near) */ {
- int rel = (((op_bytes == 2) && !mode_64bit())
- ? (int32_t)insn_fetch_type(int16_t)
- : insn_fetch_type(int32_t));
- op_bytes = mode_64bit() ? 8 : op_bytes;
- src.val = _regs.eip;
- jmp_rel(rel);
- goto push;
- }
-
- case 0xe9: /* jmp (near) */ {
- int rel = (((op_bytes == 2) && !mode_64bit())
- ? (int32_t)insn_fetch_type(int16_t)
- : insn_fetch_type(int32_t));
- jmp_rel(rel);
- break;
- }
-
- case 0xea: /* jmp (far, absolute) */ {
- uint16_t sel;
- uint32_t eip;
- generate_exception_if(mode_64bit(), EXC_UD, -1);
- eip = insn_fetch_bytes(op_bytes);
- sel = insn_fetch_type(uint16_t);
- if ( (rc = load_seg(x86_seg_cs, sel, ctxt, ops)) != 0 )
- goto done;
- _regs.eip = eip;
- break;
- }
-
- case 0xeb: /* jmp (short) */ {
- int rel = insn_fetch_type(int8_t);
- jmp_rel(rel);
- break;
- }
-
- case 0xf1: /* int1 (icebp) */
- src.val = EXC_DB;
- goto swint;
-
- case 0xf4: /* hlt */
- ctxt->retire.flags.hlt = 1;
- break;
-
- case 0xf5: /* cmc */
- _regs.eflags ^= EFLG_CF;
- break;
-
- case 0xf8: /* clc */
- _regs.eflags &= ~EFLG_CF;
- break;
-
- case 0xf9: /* stc */
- _regs.eflags |= EFLG_CF;
- break;
-
- case 0xfa: /* cli */
- generate_exception_if(!mode_iopl(), EXC_GP, 0);
- _regs.eflags &= ~EFLG_IF;
- break;
-
- case 0xfb: /* sti */
- generate_exception_if(!mode_iopl(), EXC_GP, 0);
- if ( !(_regs.eflags & EFLG_IF) )
- {
- _regs.eflags |= EFLG_IF;
- ctxt->retire.flags.sti = 1;
- }
- break;
-
- case 0xfc: /* cld */
- _regs.eflags &= ~EFLG_DF;
- break;
-
- case 0xfd: /* std */
- _regs.eflags |= EFLG_DF;
- break;
- }
- goto writeback;
-
- twobyte_insn:
- switch ( b )
- {
- case 0x40 ... 0x4f: /* cmovcc */
- dst.val = src.val;
- if ( !test_cc(b, _regs.eflags) )
- dst.type = OP_NONE;
- break;
-
- case 0x90 ... 0x9f: /* setcc */
- dst.val = test_cc(b, _regs.eflags);
- break;
-
- case 0xb0 ... 0xb1: /* cmpxchg */
- /* Save real source value, then compare EAX against destination. */
- src.orig_val = src.val;
- src.val = _regs.eax;
- emulate_2op_SrcV("cmp", src, dst, _regs.eflags);
- if ( _regs.eflags & EFLG_ZF )
- {
- /* Success: write back to memory. */
- dst.val = src.orig_val;
- }
- else
- {
- /* Failure: write the value we saw to EAX. */
- dst.type = OP_REG;
- dst.reg = (unsigned long *)&_regs.eax;
- }
- break;
-
- case 0xa3: bt: /* bt */
- emulate_2op_SrcV_nobyte("bt", src, dst, _regs.eflags);
- break;
-
- case 0xa4: /* shld imm8,r,r/m */
- case 0xa5: /* shld %%cl,r,r/m */
- case 0xac: /* shrd imm8,r,r/m */
- case 0xad: /* shrd %%cl,r,r/m */ {
- uint8_t shift, width = dst.bytes << 3;
- shift = (b & 1) ? (uint8_t)_regs.ecx : insn_fetch_type(uint8_t);
- if ( (shift &= width - 1) == 0 )
- break;
- dst.orig_val = truncate_word(dst.val, dst.bytes);
- dst.val = ((shift == width) ? src.val :
- (b & 8) ?
- /* shrd */
- ((dst.orig_val >> shift) |
- truncate_word(src.val << (width - shift), dst.bytes)) :
- /* shld */
- ((dst.orig_val << shift) |
- ((src.val >> (width - shift)) & ((1ull << shift) - 1))));
- dst.val = truncate_word(dst.val, dst.bytes);
- _regs.eflags &= ~(EFLG_OF|EFLG_SF|EFLG_ZF|EFLG_PF|EFLG_CF);
- if ( (dst.val >> ((b & 8) ? (shift - 1) : (width - shift))) & 1 )
- _regs.eflags |= EFLG_CF;
- if ( ((dst.val ^ dst.orig_val) >> (width - 1)) & 1 )
- _regs.eflags |= EFLG_OF;
- _regs.eflags |= ((dst.val >> (width - 1)) & 1) ? EFLG_SF : 0;
- _regs.eflags |= (dst.val == 0) ? EFLG_ZF : 0;
- _regs.eflags |= even_parity(dst.val) ? EFLG_PF : 0;
- break;
- }
-
- case 0xb3: btr: /* btr */
- emulate_2op_SrcV_nobyte("btr", src, dst, _regs.eflags);
- break;
-
- case 0xab: bts: /* bts */
- emulate_2op_SrcV_nobyte("bts", src, dst, _regs.eflags);
- break;
-
- case 0xaf: /* imul */
- _regs.eflags &= ~(EFLG_OF|EFLG_CF);
- switch ( dst.bytes )
- {
- case 2:
- dst.val = ((uint32_t)(int16_t)src.val *
- (uint32_t)(int16_t)dst.val);
- if ( (int16_t)dst.val != (uint32_t)dst.val )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- break;
-#ifdef __x86_64__
- case 4:
- dst.val = ((uint64_t)(int32_t)src.val *
- (uint64_t)(int32_t)dst.val);
- if ( (int32_t)dst.val != dst.val )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- break;
-#endif
- default: {
- unsigned long m[2] = { src.val, dst.val };
- if ( imul_dbl(m) )
- _regs.eflags |= EFLG_OF|EFLG_CF;
- dst.val = m[0];
- break;
- }
- }
- break;
-
- case 0xb2: /* lss */
- dst.val = x86_seg_ss;
- goto les;
-
- case 0xb4: /* lfs */
- dst.val = x86_seg_fs;
- goto les;
-
- case 0xb5: /* lgs */
- dst.val = x86_seg_gs;
- goto les;
-
- case 0xb6: /* movzx rm8,r{16,32,64} */
- /* Recompute DstReg as we may have decoded AH/BH/CH/DH. */
- dst.reg = decode_register(modrm_reg, &_regs, 0);
- dst.bytes = op_bytes;
- dst.val = (uint8_t)src.val;
- break;
-
- case 0xbc: /* bsf */ {
- int zf;
- asm ( "bsf %2,%0; setz %b1"
- : "=r" (dst.val), "=q" (zf)
- : "r" (src.val), "1" (0) );
- _regs.eflags &= ~EFLG_ZF;
- _regs.eflags |= zf ? EFLG_ZF : 0;
- break;
- }
-
- case 0xbd: /* bsr */ {
- int zf;
- asm ( "bsr %2,%0; setz %b1"
- : "=r" (dst.val), "=q" (zf)
- : "r" (src.val), "1" (0) );
- _regs.eflags &= ~EFLG_ZF;
- _regs.eflags |= zf ? EFLG_ZF : 0;
- break;
- }
-
- case 0xb7: /* movzx rm16,r{16,32,64} */
- dst.val = (uint16_t)src.val;
- break;
-
- case 0xbb: btc: /* btc */
- emulate_2op_SrcV_nobyte("btc", src, dst, _regs.eflags);
- break;
-
- case 0xba: /* Grp8 */
- switch ( modrm_reg & 7 )
- {
- case 4: goto bt;
- case 5: goto bts;
- case 6: goto btr;
- case 7: goto btc;
- default: generate_exception_if(1, EXC_UD, -1);
- }
- break;
-
- case 0xbe: /* movsx rm8,r{16,32,64} */
- /* Recompute DstReg as we may have decoded AH/BH/CH/DH. */
- dst.reg = decode_register(modrm_reg, &_regs, 0);
- dst.bytes = op_bytes;
- dst.val = (int8_t)src.val;
- break;
-
- case 0xbf: /* movsx rm16,r{16,32,64} */
- dst.val = (int16_t)src.val;
- break;
-
- case 0xc0 ... 0xc1: /* xadd */
- /* Write back the register source. */
- switch ( dst.bytes )
- {
- case 1: *(uint8_t *)src.reg = (uint8_t)dst.val; break;
- case 2: *(uint16_t *)src.reg = (uint16_t)dst.val; break;
- case 4: *src.reg = (uint32_t)dst.val; break; /* 64b reg: zero-extend */
- case 8: *src.reg = dst.val; break;
- }
- goto add;
- }
- goto writeback;
-
- twobyte_special_insn:
- switch ( b )
- {
- case 0x01: /* Grp7 */ {
- struct segment_register reg;
- unsigned long base, limit, cr0, cr0w;
-
- if ( modrm == 0xdf ) /* invlpga */
- {
- generate_exception_if(in_realmode(ctxt, ops), EXC_UD, -1);
- generate_exception_if(!mode_ring0(), EXC_GP, 0);
- fail_if(ops->invlpg == NULL);
- if ( (rc = ops->invlpg(x86_seg_none, truncate_ea(_regs.eax),
- ctxt)) )
- goto done;
- break;
- }
-
- switch ( modrm_reg & 7 )
- {
- case 0: /* sgdt */
- case 1: /* sidt */
- generate_exception_if(ea.type != OP_MEM, EXC_UD, -1);
- fail_if(ops->read_segment == NULL);
- if ( (rc = ops->read_segment((modrm_reg & 1) ?
- x86_seg_idtr : x86_seg_gdtr,
- ®, ctxt)) )
- goto done;
- if ( op_bytes == 2 )
- reg.base &= 0xffffff;
- if ( (rc = ops->write(ea.mem.seg, ea.mem.off+0,
- reg.limit, 2, ctxt)) ||
- (rc = ops->write(ea.mem.seg, ea.mem.off+2,
- reg.base, mode_64bit() ? 8 : 4, ctxt)) )
- goto done;
- break;
- case 2: /* lgdt */
- case 3: /* lidt */
- generate_exception_if(ea.type != OP_MEM, EXC_UD, -1);
- fail_if(ops->write_segment == NULL);
- memset(®, 0, sizeof(reg));
- if ( (rc = ops->read(ea.mem.seg, ea.mem.off+0,
- &limit, 2, ctxt)) ||
- (rc = ops->read(ea.mem.seg, ea.mem.off+2,
- &base, mode_64bit() ? 8 : 4, ctxt)) )
- goto done;
- reg.base = base;
- reg.limit = limit;
- if ( op_bytes == 2 )
- reg.base &= 0xffffff;
- if ( (rc = ops->write_segment((modrm_reg & 1) ?
- x86_seg_idtr : x86_seg_gdtr,
- ®, ctxt)) )
- goto done;
- break;
- case 4: /* smsw */
- ea.bytes = 2;
- dst = ea;
- fail_if(ops->read_cr == NULL);
- if ( (rc = ops->read_cr(0, &dst.val, ctxt)) )
- goto done;
- d |= Mov; /* force writeback */
- break;
- case 6: /* lmsw */
- fail_if(ops->read_cr == NULL);
- fail_if(ops->write_cr == NULL);
- if ( (rc = ops->read_cr(0, &cr0, ctxt)) )
- goto done;
- if ( ea.type == OP_REG )
- cr0w = *ea.reg;
- else if ( (rc = ops->read(ea.mem.seg, ea.mem.off,
- &cr0w, 2, ctxt)) )
- goto done;
- cr0 &= 0xffff0000;
- cr0 |= (uint16_t)cr0w;
- if ( (rc = ops->write_cr(0, cr0, ctxt)) )
- goto done;
- break;
- case 7: /* invlpg */
- generate_exception_if(!mode_ring0(), EXC_GP, 0);
- generate_exception_if(ea.type != OP_MEM, EXC_UD, -1);
- fail_if(ops->invlpg == NULL);
- if ( (rc = ops->invlpg(ea.mem.seg, ea.mem.off, ctxt)) )
- goto done;
- break;
- default:
- goto cannot_emulate;
- }
- break;
- }
-
- case 0x06: /* clts */
- generate_exception_if(!mode_ring0(), EXC_GP, 0);
- fail_if((ops->read_cr == NULL) || (ops->write_cr == NULL));
- if ( (rc = ops->read_cr(0, &dst.val, ctxt)) ||
- (rc = ops->write_cr(0, dst.val&~8, ctxt)) )
- goto done;
- break;
-
- case 0x08: /* invd */
- case 0x09: /* wbinvd */
- generate_exception_if(!mode_ring0(), EXC_GP, 0);
- fail_if(ops->wbinvd == NULL);
- if ( (rc = ops->wbinvd(ctxt)) != 0 )
- goto done;
- break;
-
- case 0x0d: /* GrpP (prefetch) */
- case 0x18: /* Grp16 (prefetch/nop) */
- case 0x19 ... 0x1f: /* nop (amd-defined) */
- break;
-
- case 0x20: /* mov cr,reg */
- case 0x21: /* mov dr,reg */
- case 0x22: /* mov reg,cr */
- case 0x23: /* mov reg,dr */
- generate_exception_if(ea.type != OP_REG, EXC_UD, -1);
- generate_exception_if(!mode_ring0(), EXC_GP, 0);
- modrm_reg |= lock_prefix << 3;
- if ( b & 2 )
- {
- /* Write to CR/DR. */
- src.val = *(unsigned long *)decode_register(modrm_rm, &_regs, 0);
- if ( !mode_64bit() )
- src.val = (uint32_t)src.val;
- rc = ((b & 1)
- ? (ops->write_dr
- ? ops->write_dr(modrm_reg, src.val, ctxt)
- : X86EMUL_UNHANDLEABLE)
- : (ops->write_cr
- ? ops->write_cr(modrm_reg, src.val, ctxt)
- : X86EMUL_UNHANDLEABLE));
- }
- else
- {
- /* Read from CR/DR. */
- dst.type = OP_REG;
- dst.bytes = mode_64bit() ? 8 : 4;
- dst.reg = decode_register(modrm_rm, &_regs, 0);
- rc = ((b & 1)
- ? (ops->read_dr
- ? ops->read_dr(modrm_reg, &dst.val, ctxt)
- : X86EMUL_UNHANDLEABLE)
- : (ops->read_cr
- ? ops->read_cr(modrm_reg, &dst.val, ctxt)
- : X86EMUL_UNHANDLEABLE));
- }
- if ( rc != 0 )
- goto done;
- break;
-
- case 0x30: /* wrmsr */ {
- uint64_t val = ((uint64_t)_regs.edx << 32) | (uint32_t)_regs.eax;
- generate_exception_if(!mode_ring0(), EXC_GP, 0);
- fail_if(ops->write_msr == NULL);
- if ( (rc = ops->write_msr((uint32_t)_regs.ecx, val, ctxt)) != 0 )
- goto done;
- break;
- }
-
- case 0x31: /* rdtsc */ {
- unsigned long cr4;
- uint64_t val;
- fail_if(ops->read_cr == NULL);
- if ( (rc = ops->read_cr(4, &cr4, ctxt)) )
- goto done;
- generate_exception_if((cr4 & CR4_TSD) && !mode_ring0(), EXC_GP, 0);
- fail_if(ops->read_msr == NULL);
- if ( (rc = ops->read_msr(MSR_TSC, &val, ctxt)) != 0 )
- goto done;
- _regs.edx = (uint32_t)(val >> 32);
- _regs.eax = (uint32_t)(val >> 0);
- break;
- }
-
- case 0x32: /* rdmsr */ {
- uint64_t val;
- generate_exception_if(!mode_ring0(), EXC_GP, 0);
- fail_if(ops->read_msr == NULL);
- if ( (rc = ops->read_msr((uint32_t)_regs.ecx, &val, ctxt)) != 0 )
- goto done;
- _regs.edx = (uint32_t)(val >> 32);
- _regs.eax = (uint32_t)(val >> 0);
- break;
- }
-
- case 0x80 ... 0x8f: /* jcc (near) */ {
- int rel = (((op_bytes == 2) && !mode_64bit())
- ? (int32_t)insn_fetch_type(int16_t)
- : insn_fetch_type(int32_t));
- if ( test_cc(b, _regs.eflags) )
- jmp_rel(rel);
- break;
- }
-
- case 0xa0: /* push %%fs */
- src.val = x86_seg_fs;
- goto push_seg;
-
- case 0xa1: /* pop %%fs */
- src.val = x86_seg_fs;
- goto pop_seg;
-
- case 0xa2: /* cpuid */ {
- unsigned int eax = _regs.eax, ebx = _regs.ebx;
- unsigned int ecx = _regs.ecx, edx = _regs.edx;
- fail_if(ops->cpuid == NULL);
- if ( (rc = ops->cpuid(&eax, &ebx, &ecx, &edx, ctxt)) != 0 )
- goto done;
- _regs.eax = eax; _regs.ebx = ebx;
- _regs.ecx = ecx; _regs.edx = edx;
- break;
- }
-
- case 0xa8: /* push %%gs */
- src.val = x86_seg_gs;
- goto push_seg;
-
- case 0xa9: /* pop %%gs */
- src.val = x86_seg_gs;
- goto pop_seg;
-
- case 0xc7: /* Grp9 (cmpxchg8b) */
-#if defined(__i386__)
- {
- unsigned long old_lo, old_hi;
- generate_exception_if((modrm_reg & 7) != 1, EXC_UD, -1);
- generate_exception_if(ea.type != OP_MEM, EXC_UD, -1);
- if ( (rc = ops->read(ea.mem.seg, ea.mem.off+0, &old_lo, 4, ctxt)) ||
- (rc = ops->read(ea.mem.seg, ea.mem.off+4, &old_hi, 4, ctxt)) )
- goto done;
- if ( (old_lo != _regs.eax) || (old_hi != _regs.edx) )
- {
- _regs.eax = old_lo;
- _regs.edx = old_hi;
- _regs.eflags &= ~EFLG_ZF;
- }
- else if ( ops->cmpxchg8b == NULL )
- {
- rc = X86EMUL_UNHANDLEABLE;
- goto done;
- }
- else
- {
- if ( (rc = ops->cmpxchg8b(ea.mem.seg, ea.mem.off, old_lo, old_hi,
- _regs.ebx, _regs.ecx, ctxt)) != 0 )
- goto done;
- _regs.eflags |= EFLG_ZF;
- }
- break;
- }
-#elif defined(__x86_64__)
- {
- unsigned long old, new;
- generate_exception_if((modrm_reg & 7) != 1, EXC_UD, -1);
- generate_exception_if(ea.type != OP_MEM, EXC_UD, -1);
- if ( (rc = ops->read(ea.mem.seg, ea.mem.off, &old, 8, ctxt)) != 0 )
- goto done;
- if ( ((uint32_t)(old>>0) != (uint32_t)_regs.eax) ||
- ((uint32_t)(old>>32) != (uint32_t)_regs.edx) )
- {
- _regs.eax = (uint32_t)(old>>0);
- _regs.edx = (uint32_t)(old>>32);
- _regs.eflags &= ~EFLG_ZF;
- }
- else
- {
- new = (_regs.ecx<<32)|(uint32_t)_regs.ebx;
- if ( (rc = ops->cmpxchg(ea.mem.seg, ea.mem.off, old,
- new, 8, ctxt)) != 0 )
- goto done;
- _regs.eflags |= EFLG_ZF;
- }
- break;
- }
-#endif
-
- case 0xc8 ... 0xcf: /* bswap */
- dst.type = OP_REG;
- dst.reg = decode_register(
- (b & 7) | ((rex_prefix & 1) << 3), &_regs, 0);
- switch ( dst.bytes = op_bytes )
- {
- default: /* case 2: */
- /* Undefined behaviour. Writes zero on all tested CPUs. */
- dst.val = 0;
- break;
- case 4:
-#ifdef __x86_64__
- asm ( "bswap %k0" : "=r" (dst.val) : "0" (*dst.reg) );
- break;
- case 8:
-#endif
- asm ( "bswap %0" : "=r" (dst.val) : "0" (*dst.reg) );
- break;
- }
- break;
- }
- goto writeback;
-
- cannot_emulate:
-#if 0
- gdprintk(XENLOG_DEBUG, "Instr:");
- for ( ea.mem.off = ctxt->regs->eip; ea.mem.off < _regs.eip; ea.mem.off++ )
- {
- unsigned long x;
- ops->insn_fetch(x86_seg_cs, ea.mem.off, &x, 1, ctxt);
- printk(" %02x", (uint8_t)x);
- }
- printk("\n");
-#endif
- return X86EMUL_UNHANDLEABLE;
-}
+#include "x86_emulate/x86_emulate.c"
diff -r d24f37b31030 -r d434c73ec8b7 xen/arch/x86/x86_emulate/x86_emulate.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c Mon Mar 31 14:21:13 2008 +0100
@@ -0,0 +1,3429 @@
+/******************************************************************************
+ * x86_emulate.c
+ *
+ * Generic x86 (32-bit and 64-bit) instruction decoder and emulator.
+ *
+ * Copyright (c) 2005-2007 Keir Fraser
+ * Copyright (c) 2005-2007 XenSource Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/* Operand sizes: 8-bit operands or specified/overridden size. */
+#define ByteOp (1<<0) /* 8-bit operands. */
+/* Destination operand type. */
+#define DstBitBase (0<<1) /* Memory operand, bit string. */
+#define ImplicitOps (1<<1) /* Implicit in opcode. No generic decode. */
+#define DstReg (2<<1) /* Register operand. */
+#define DstMem (3<<1) /* Memory operand. */
+#define DstMask (3<<1)
+/* Source operand type. */
+#define SrcNone (0<<3) /* No source operand. */
+#define SrcImplicit (0<<3) /* Source operand is implicit in the opcode. */
+#define SrcReg (1<<3) /* Register operand. */
+#define SrcMem (2<<3) /* Memory operand. */
+#define SrcMem16 (3<<3) /* Memory operand (16-bit). */
+#define SrcImm (4<<3) /* Immediate operand. */
+#define SrcImmByte (5<<3) /* 8-bit sign-extended immediate operand. */
+#define SrcMask (7<<3)
+/* Generic ModRM decode. */
+#define ModRM (1<<6)
+/* Destination is only written; never read. */
+#define Mov (1<<7)
+
+static uint8_t opcode_table[256] = {
+ /* 0x00 - 0x07 */
+ ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
+ ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
+ ByteOp|DstReg|SrcImm, DstReg|SrcImm, ImplicitOps, ImplicitOps,
+ /* 0x08 - 0x0F */
+ ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
+ ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
+ ByteOp|DstReg|SrcImm, DstReg|SrcImm, ImplicitOps, 0,
+ /* 0x10 - 0x17 */
+ ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
+ ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
+ ByteOp|DstReg|SrcImm, DstReg|SrcImm, ImplicitOps, ImplicitOps,
+ /* 0x18 - 0x1F */
+ ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
+ ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
+ ByteOp|DstReg|SrcImm, DstReg|SrcImm, ImplicitOps, ImplicitOps,
+ /* 0x20 - 0x27 */
+ ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
+ ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
+ ByteOp|DstReg|SrcImm, DstReg|SrcImm, 0, ImplicitOps,
+ /* 0x28 - 0x2F */
+ ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
+ ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
+ ByteOp|DstReg|SrcImm, DstReg|SrcImm, 0, ImplicitOps,
+ /* 0x30 - 0x37 */
+ ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
+ ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
+ ByteOp|DstReg|SrcImm, DstReg|SrcImm, 0, ImplicitOps,
+ /* 0x38 - 0x3F */
+ ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
+ ByteOp|DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
+ ByteOp|DstReg|SrcImm, DstReg|SrcImm, 0, ImplicitOps,
+ /* 0x40 - 0x4F */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0x50 - 0x5F */
+ ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov,
+ ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov,
+ ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov,
+ ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov,
+ /* 0x60 - 0x67 */
+ ImplicitOps, ImplicitOps, DstReg|SrcMem|ModRM, DstReg|SrcMem16|ModRM|Mov,
+ 0, 0, 0, 0,
+ /* 0x68 - 0x6F */
+ ImplicitOps|Mov, DstReg|SrcImm|ModRM|Mov,
+ ImplicitOps|Mov, DstReg|SrcImmByte|ModRM|Mov,
+ ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov, ImplicitOps|Mov,
+ /* 0x70 - 0x77 */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0x78 - 0x7F */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0x80 - 0x87 */
+ ByteOp|DstMem|SrcImm|ModRM, DstMem|SrcImm|ModRM,
+ ByteOp|DstMem|SrcImm|ModRM, DstMem|SrcImmByte|ModRM,
+ ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
+ ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
+ /* 0x88 - 0x8F */
+ ByteOp|DstMem|SrcReg|ModRM|Mov, DstMem|SrcReg|ModRM|Mov,
+ ByteOp|DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
+ DstMem|SrcReg|ModRM|Mov, DstReg|SrcNone|ModRM,
+ DstReg|SrcMem|ModRM|Mov, DstMem|SrcNone|ModRM|Mov,
+ /* 0x90 - 0x97 */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0x98 - 0x9F */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0xA0 - 0xA7 */
+ ByteOp|ImplicitOps|Mov, ImplicitOps|Mov,
+ ByteOp|ImplicitOps|Mov, ImplicitOps|Mov,
+ ByteOp|ImplicitOps|Mov, ImplicitOps|Mov,
+ ByteOp|ImplicitOps, ImplicitOps,
+ /* 0xA8 - 0xAF */
+ ByteOp|DstReg|SrcImm, DstReg|SrcImm,
+ ByteOp|ImplicitOps|Mov, ImplicitOps|Mov,
+ ByteOp|ImplicitOps|Mov, ImplicitOps|Mov,
+ ByteOp|ImplicitOps, ImplicitOps,
+ /* 0xB0 - 0xB7 */
+ ByteOp|DstReg|SrcImm|Mov, ByteOp|DstReg|SrcImm|Mov,
+ ByteOp|DstReg|SrcImm|Mov, ByteOp|DstReg|SrcImm|Mov,
+ ByteOp|DstReg|SrcImm|Mov, ByteOp|DstReg|SrcImm|Mov,
+ ByteOp|DstReg|SrcImm|Mov, ByteOp|DstReg|SrcImm|Mov,
+ /* 0xB8 - 0xBF */
+ DstReg|SrcImm|Mov, DstReg|SrcImm|Mov, DstReg|SrcImm|Mov, DstReg|SrcImm|Mov,
+ DstReg|SrcImm|Mov, DstReg|SrcImm|Mov, DstReg|SrcImm|Mov, DstReg|SrcImm|Mov,
+ /* 0xC0 - 0xC7 */
+ ByteOp|DstMem|SrcImm|ModRM, DstMem|SrcImmByte|ModRM,
+ ImplicitOps, ImplicitOps,
+ DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
+ ByteOp|DstMem|SrcImm|ModRM|Mov, DstMem|SrcImm|ModRM|Mov,
+ /* 0xC8 - 0xCF */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0xD0 - 0xD7 */
+ ByteOp|DstMem|SrcImplicit|ModRM, DstMem|SrcImplicit|ModRM,
+ ByteOp|DstMem|SrcImplicit|ModRM, DstMem|SrcImplicit|ModRM,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0xD8 - 0xDF */
+ 0, ImplicitOps|ModRM|Mov, 0, ImplicitOps|ModRM|Mov,
+ 0, ImplicitOps|ModRM|Mov, ImplicitOps|ModRM|Mov, ImplicitOps|ModRM|Mov,
+ /* 0xE0 - 0xE7 */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0xE8 - 0xEF */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0xF0 - 0xF7 */
+ 0, ImplicitOps, 0, 0,
+ ImplicitOps, ImplicitOps,
+ ByteOp|DstMem|SrcNone|ModRM, DstMem|SrcNone|ModRM,
+ /* 0xF8 - 0xFF */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ByteOp|DstMem|SrcNone|ModRM, DstMem|SrcNone|ModRM
+};
+
+static uint8_t twobyte_table[256] = {
+ /* 0x00 - 0x07 */
+ 0, ImplicitOps|ModRM, 0, 0, 0, 0, ImplicitOps, 0,
+ /* 0x08 - 0x0F */
+ ImplicitOps, ImplicitOps, 0, 0, 0, ImplicitOps|ModRM, 0, 0,
+ /* 0x10 - 0x17 */
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0x18 - 0x1F */
+ ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM,
+ ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM,
+ /* 0x20 - 0x27 */
+ ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM, ImplicitOps|ModRM,
+ 0, 0, 0, 0,
+ /* 0x28 - 0x2F */
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0x30 - 0x37 */
+ ImplicitOps, ImplicitOps, ImplicitOps, 0, 0, 0, 0, 0,
+ /* 0x38 - 0x3F */
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0x40 - 0x47 */
+ DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
+ DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
+ DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
+ DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
+ /* 0x48 - 0x4F */
+ DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
+ DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
+ DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
+ DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
+ /* 0x50 - 0x5F */
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0x60 - 0x6F */
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0x70 - 0x7F */
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0x80 - 0x87 */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0x88 - 0x8F */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0x90 - 0x97 */
+ ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
+ ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
+ ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
+ ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
+ /* 0x98 - 0x9F */
+ ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
+ ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
+ ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
+ ByteOp|DstMem|SrcNone|ModRM|Mov, ByteOp|DstMem|SrcNone|ModRM|Mov,
+ /* 0xA0 - 0xA7 */
+ ImplicitOps, ImplicitOps, ImplicitOps, DstBitBase|SrcReg|ModRM,
+ DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM, 0, 0,
+ /* 0xA8 - 0xAF */
+ ImplicitOps, ImplicitOps, 0, DstBitBase|SrcReg|ModRM,
+ DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM, 0, DstReg|SrcMem|ModRM,
+ /* 0xB0 - 0xB7 */
+ ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM,
+ DstReg|SrcMem|ModRM|Mov, DstBitBase|SrcReg|ModRM,
+ DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem|ModRM|Mov,
+ ByteOp|DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem16|ModRM|Mov,
+ /* 0xB8 - 0xBF */
+ 0, 0, DstBitBase|SrcImmByte|ModRM, DstBitBase|SrcReg|ModRM,
+ DstReg|SrcMem|ModRM, DstReg|SrcMem|ModRM,
+ ByteOp|DstReg|SrcMem|ModRM|Mov, DstReg|SrcMem16|ModRM|Mov,
+ /* 0xC0 - 0xC7 */
+ ByteOp|DstMem|SrcReg|ModRM, DstMem|SrcReg|ModRM, 0, 0,
+ 0, 0, 0, ImplicitOps|ModRM,
+ /* 0xC8 - 0xCF */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0xD0 - 0xDF */
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0xE0 - 0xEF */
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0xF0 - 0xFF */
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+/* Type, address-of, and value of an instruction's operand. */
+struct operand {
+ enum { OP_REG, OP_MEM, OP_IMM, OP_NONE } type;
+ unsigned int bytes;
+ unsigned long val, orig_val;
+ union {
+ /* OP_REG: Pointer to register field. */
+ unsigned long *reg;
+ /* OP_MEM: Segment and offset. */
+ struct {
+ enum x86_segment seg;
+ unsigned long off;
+ } mem;
+ };
+};
+
+/* MSRs. */
+#define MSR_TSC 0x10
+
+/* Control register flags. */
+#define CR0_PE (1<<0)
+#define CR4_TSD (1<<2)
+
+/* EFLAGS bit definitions. */
+#define EFLG_VIP (1<<20)
+#define EFLG_VIF (1<<19)
+#define EFLG_AC (1<<18)
+#define EFLG_VM (1<<17)
+#define EFLG_RF (1<<16)
+#define EFLG_NT (1<<14)
+#define EFLG_IOPL (3<<12)
+#define EFLG_OF (1<<11)
+#define EFLG_DF (1<<10)
+#define EFLG_IF (1<<9)
+#define EFLG_TF (1<<8)
+#define EFLG_SF (1<<7)
+#define EFLG_ZF (1<<6)
+#define EFLG_AF (1<<4)
+#define EFLG_PF (1<<2)
+#define EFLG_CF (1<<0)
+
+/* Exception definitions. */
+#define EXC_DE 0
+#define EXC_DB 1
+#define EXC_BP 3
+#define EXC_OF 4
+#define EXC_BR 5
+#define EXC_UD 6
+#define EXC_TS 10
+#define EXC_NP 11
+#define EXC_SS 12
+#define EXC_GP 13
+#define EXC_PF 14
+#define EXC_MF 16
+
+/*
+ * Instruction emulation:
+ * Most instructions are emulated directly via a fragment of inline assembly
+ * code. This allows us to save/restore EFLAGS and thus very easily pick up
+ * any modified flags.
+ */
+
+#if defined(__x86_64__)
+#define _LO32 "k" /* force 32-bit operand */
+#define _STK "%%rsp" /* stack pointer */
+#define _BYTES_PER_LONG "8"
+#elif defined(__i386__)
+#define _LO32 "" /* force 32-bit operand */
+#define _STK "%%esp" /* stack pointer */
+#define _BYTES_PER_LONG "4"
+#endif
+
+/*
+ * These EFLAGS bits are restored from saved value during emulation, and
+ * any changes are written back to the saved value after emulation.
+ */
+#define EFLAGS_MASK (EFLG_OF|EFLG_SF|EFLG_ZF|EFLG_AF|EFLG_PF|EFLG_CF)
+
+/* Before executing instruction: restore necessary bits in EFLAGS. */
+#define _PRE_EFLAGS(_sav, _msk, _tmp) \
+/* EFLAGS = (_sav & _msk) | (EFLAGS & ~_msk); _sav &= ~_msk; */ \
+"movl %"_sav",%"_LO32 _tmp"; " \
+"push %"_tmp"; " \
+"push %"_tmp"; " \
+"movl %"_msk",%"_LO32 _tmp"; " \
+"andl %"_LO32 _tmp",("_STK"); " \
+"pushf; " \
+"notl %"_LO32 _tmp"; " \
+"andl %"_LO32 _tmp",("_STK"); " \
+"andl %"_LO32 _tmp",2*"_BYTES_PER_LONG"("_STK"); " \
+"pop %"_tmp"; " \
+"orl %"_LO32 _tmp",("_STK"); " \
+"popf; " \
+"pop %"_sav"; "
+
+/* After executing instruction: write-back necessary bits in EFLAGS. */
+#define _POST_EFLAGS(_sav, _msk, _tmp) \
+/* _sav |= EFLAGS & _msk; */ \
+"pushf; " \
+"pop %"_tmp"; " \
+"andl %"_msk",%"_LO32 _tmp"; " \
+"orl %"_LO32 _tmp",%"_sav"; "
+
+/* Raw emulation: instruction has two explicit operands. */
+#define __emulate_2op_nobyte(_op,_src,_dst,_eflags,_wx,_wy,_lx,_ly,_qx,_qy)\
+do{ unsigned long _tmp; \
+ switch ( (_dst).bytes ) \
+ { \
+ case 2: \
+ asm volatile ( \
+ _PRE_EFLAGS("0","4","2") \
+ _op"w %"_wx"3,%1; " \
+ _POST_EFLAGS("0","4","2") \
+ : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
+ : _wy ((_src).val), "i" (EFLAGS_MASK), \
+ "m" (_eflags), "m" ((_dst).val) ); \
+ break; \
+ case 4: \
+ asm volatile ( \
+ _PRE_EFLAGS("0","4","2") \
+ _op"l %"_lx"3,%1; " \
+ _POST_EFLAGS("0","4","2") \
+ : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
+ : _ly ((_src).val), "i" (EFLAGS_MASK), \
+ "m" (_eflags), "m" ((_dst).val) ); \
+ break; \
+ case 8: \
+ __emulate_2op_8byte(_op, _src, _dst, _eflags, _qx, _qy); \
+ break; \
+ } \
+} while (0)
+#define __emulate_2op(_op,_src,_dst,_eflags,_bx,_by,_wx,_wy,_lx,_ly,_qx,_qy)\
+do{ unsigned long _tmp; \
+ switch ( (_dst).bytes ) \
+ { \
+ case 1: \
+ asm volatile ( \
+ _PRE_EFLAGS("0","4","2") \
+ _op"b %"_bx"3,%1; " \
+ _POST_EFLAGS("0","4","2") \
+ : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
+ : _by ((_src).val), "i" (EFLAGS_MASK), \
+ "m" (_eflags), "m" ((_dst).val) ); \
+ break; \
+ default: \
+ __emulate_2op_nobyte(_op,_src,_dst,_eflags,_wx,_wy,_lx,_ly,_qx,_qy);\
+ break; \
+ } \
+} while (0)
+/* Source operand is byte-sized and may be restricted to just %cl. */
+#define emulate_2op_SrcB(_op, _src, _dst, _eflags) \
+ __emulate_2op(_op, _src, _dst, _eflags, \
+ "b", "c", "b", "c", "b", "c", "b", "c")
+/* Source operand is byte, word, long or quad sized. */
+#define emulate_2op_SrcV(_op, _src, _dst, _eflags) \
+ __emulate_2op(_op, _src, _dst, _eflags, \
+ "b", "q", "w", "r", _LO32, "r", "", "r")
+/* Source operand is word, long or quad sized. */
+#define emulate_2op_SrcV_nobyte(_op, _src, _dst, _eflags) \
+ __emulate_2op_nobyte(_op, _src, _dst, _eflags, \
+ "w", "r", _LO32, "r", "", "r")
+
+/* Instruction has only one explicit operand (no source operand). */
+#define emulate_1op(_op,_dst,_eflags) \
+do{ unsigned long _tmp; \
+ switch ( (_dst).bytes ) \
+ { \
+ case 1: \
+ asm volatile ( \
+ _PRE_EFLAGS("0","3","2") \
+ _op"b %1; " \
+ _POST_EFLAGS("0","3","2") \
+ : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
+ : "i" (EFLAGS_MASK), "m" (_eflags), "m" ((_dst).val) ); \
+ break; \
+ case 2: \
+ asm volatile ( \
+ _PRE_EFLAGS("0","3","2") \
+ _op"w %1; " \
+ _POST_EFLAGS("0","3","2") \
+ : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
+ : "i" (EFLAGS_MASK), "m" (_eflags), "m" ((_dst).val) ); \
+ break; \
+ case 4: \
+ asm volatile ( \
+ _PRE_EFLAGS("0","3","2") \
+ _op"l %1; " \
+ _POST_EFLAGS("0","3","2") \
+ : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
+ : "i" (EFLAGS_MASK), "m" (_eflags), "m" ((_dst).val) ); \
+ break; \
+ case 8: \
+ __emulate_1op_8byte(_op, _dst, _eflags); \
+ break; \
+ } \
+} while (0)
+
+/* Emulate an instruction with quadword operands (x86/64 only). */
+#if defined(__x86_64__)
+#define __emulate_2op_8byte(_op, _src, _dst, _eflags, _qx, _qy) \
+do{ asm volatile ( \
+ _PRE_EFLAGS("0","4","2") \
+ _op"q %"_qx"3,%1; " \
+ _POST_EFLAGS("0","4","2") \
+ : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
+ : _qy ((_src).val), "i" (EFLAGS_MASK), \
+ "m" (_eflags), "m" ((_dst).val) ); \
+} while (0)
+#define __emulate_1op_8byte(_op, _dst, _eflags) \
+do{ asm volatile ( \
+ _PRE_EFLAGS("0","3","2") \
+ _op"q %1; " \
+ _POST_EFLAGS("0","3","2") \
+ : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
+ : "i" (EFLAGS_MASK), "m" (_eflags), "m" ((_dst).val) ); \
+} while (0)
+#elif defined(__i386__)
+#define __emulate_2op_8byte(_op, _src, _dst, _eflags, _qx, _qy)
+#define __emulate_1op_8byte(_op, _dst, _eflags)
+#endif /* __i386__ */
+
+/* Fetch next part of the instruction being emulated. */
+#define insn_fetch_bytes(_size) \
+({ unsigned long _x, _eip = _regs.eip; \
+ if ( !mode_64bit() ) _eip = (uint32_t)_eip; /* ignore upper dword */ \
+ _regs.eip += (_size); /* real hardware doesn't truncate */ \
+ generate_exception_if((uint8_t)(_regs.eip - ctxt->regs->eip) > 15, \
+ EXC_GP, 0); \
+ rc = ops->insn_fetch(x86_seg_cs, _eip, &_x, (_size), ctxt); \
+ if ( rc ) goto done; \
+ _x; \
+})
+#define insn_fetch_type(_type) ((_type)insn_fetch_bytes(sizeof(_type)))
+
+#define truncate_word(ea, byte_width) \
+({ unsigned long __ea = (ea); \
+ unsigned int _width = (byte_width); \
+ ((_width == sizeof(unsigned long)) ? __ea : \
+ (__ea & ((1UL << (_width << 3)) - 1))); \
+})
+#define truncate_ea(ea) truncate_word((ea), ad_bytes)
+
+#define mode_64bit() (def_ad_bytes == 8)
+
+#define fail_if(p) \
+do { \
+ rc = (p) ? X86EMUL_UNHANDLEABLE : X86EMUL_OKAY; \
+ if ( rc ) goto done; \
+} while (0)
+
+#define generate_exception_if(p, e, ec) \
+({ if ( (p) ) { \
+ fail_if(ops->inject_hw_exception == NULL); \
+ rc = ops->inject_hw_exception(e, ec, ctxt) ? : X86EMUL_EXCEPTION; \
+ goto done; \
+ } \
+})
+
+/*
+ * Given byte has even parity (even number of 1s)? SDM Vol. 1 Sec. 3.4.3.1,
+ * "Status Flags": EFLAGS.PF reflects parity of least-sig. byte of result only.
+ */
+static int even_parity(uint8_t v)
+{
+ asm ( "test %b0,%b0; setp %b0" : "=a" (v) : "0" (v) );
+ return v;
+}
+
+/* Update address held in a register, based on addressing mode. */
+#define _register_address_increment(reg, inc, byte_width) \
+do { \
+ int _inc = (inc); /* signed type ensures sign extension to long */ \
+ unsigned int _width = (byte_width); \
+ if ( _width == sizeof(unsigned long) ) \
+ (reg) += _inc; \
+ else if ( mode_64bit() ) \
+ (reg) = ((reg) + _inc) & ((1UL << (_width << 3)) - 1); \
+ else \
+ (reg) = ((reg) & ~((1UL << (_width << 3)) - 1)) | \
+ (((reg) + _inc) & ((1UL << (_width << 3)) - 1)); \
+} while (0)
+#define register_address_increment(reg, inc) \
+ _register_address_increment((reg), (inc), ad_bytes)
+
+#define sp_pre_dec(dec) ({ \
+ _register_address_increment(_regs.esp, -(dec), ctxt->sp_size/8); \
+ truncate_word(_regs.esp, ctxt->sp_size/8); \
+})
+#define sp_post_inc(inc) ({ \
+ unsigned long __esp = truncate_word(_regs.esp, ctxt->sp_size/8); \
+ _register_address_increment(_regs.esp, (inc), ctxt->sp_size/8); \
+ __esp; \
+})
+
+#define jmp_rel(rel) \
+do { \
+ int _rel = (int)(rel); \
+ _regs.eip += _rel; \
+ if ( !mode_64bit() ) \
+ _regs.eip = ((op_bytes == 2) \
+ ? (uint16_t)_regs.eip : (uint32_t)_regs.eip); \
+} while (0)
+
+static unsigned long __get_rep_prefix(
+ struct cpu_user_regs *int_regs,
+ struct cpu_user_regs *ext_regs,
+ int ad_bytes)
+{
+ unsigned long ecx = ((ad_bytes == 2) ? (uint16_t)int_regs->ecx :
+ (ad_bytes == 4) ? (uint32_t)int_regs->ecx :
+ int_regs->ecx);
+
+ /* Skip the instruction if no repetitions are required. */
+ if ( ecx == 0 )
+ ext_regs->eip = int_regs->eip;
+
+ return ecx;
+}
+
+#define get_rep_prefix() ({ \
+ unsigned long max_reps = 1; \
+ if ( rep_prefix ) \
+ max_reps = __get_rep_prefix(&_regs, ctxt->regs, ad_bytes); \
+ if ( max_reps == 0 ) \
+ goto done; \
+ max_reps; \
+})
+
+static void __put_rep_prefix(
+ struct cpu_user_regs *int_regs,
+ struct cpu_user_regs *ext_regs,
+ int ad_bytes,
+ unsigned long reps_completed)
+{
+ unsigned long ecx = ((ad_bytes == 2) ? (uint16_t)int_regs->ecx :
+ (ad_bytes == 4) ? (uint32_t)int_regs->ecx :
+ int_regs->ecx);
+
+ /* Reduce counter appropriately, and repeat instruction if non-zero. */
+ ecx -= reps_completed;
+ if ( ecx != 0 )
+ int_regs->eip = ext_regs->eip;
+
+ if ( ad_bytes == 2 )
+ *(uint16_t *)&int_regs->ecx = ecx;
+ else if ( ad_bytes == 4 )
+ int_regs->ecx = (uint32_t)ecx;
+ else
+ int_regs->ecx = ecx;
+}
+
+#define put_rep_prefix(reps_completed) ({ \
+ if ( rep_prefix ) \
+ __put_rep_prefix(&_regs, ctxt->regs, ad_bytes, reps_completed); \
+})
+
+/*
+ * Unsigned multiplication with double-word result.
+ * IN: Multiplicand=m[0], Multiplier=m[1]
+ * OUT: Return CF/OF (overflow status); Result=m[1]:m[0]
+ */
+static int mul_dbl(unsigned long m[2])
+{
+ int rc;
+ asm ( "mul %4; seto %b2"
+ : "=a" (m[0]), "=d" (m[1]), "=q" (rc)
+ : "0" (m[0]), "1" (m[1]), "2" (0) );
+ return rc;
+}
+
+/*
+ * Signed multiplication with double-word result.
+ * IN: Multiplicand=m[0], Multiplier=m[1]
+ * OUT: Return CF/OF (overflow status); Result=m[1]:m[0]
+ */
+static int imul_dbl(unsigned long m[2])
+{
+ int rc;
+ asm ( "imul %4; seto %b2"
+ : "=a" (m[0]), "=d" (m[1]), "=q" (rc)
+ : "0" (m[0]), "1" (m[1]), "2" (0) );
+ return rc;
+}
+
+/*
+ * Unsigned division of double-word dividend.
+ * IN: Dividend=u[1]:u[0], Divisor=v
+ * OUT: Return 1: #DE
+ * Return 0: Quotient=u[0], Remainder=u[1]
+ */
+static int div_dbl(unsigned long u[2], unsigned long v)
+{
+ if ( (v == 0) || (u[1] >= v) )
+ return 1;
+ asm ( "div %4"
+ : "=a" (u[0]), "=d" (u[1])
+ : "0" (u[0]), "1" (u[1]), "r" (v) );
+ return 0;
+}
+
+/*
+ * Signed division of double-word dividend.
+ * IN: Dividend=u[1]:u[0], Divisor=v
+ * OUT: Return 1: #DE
+ * Return 0: Quotient=u[0], Remainder=u[1]
+ * NB. We don't use idiv directly as it's moderately hard to work out
+ * ahead of time whether it will #DE, which we cannot allow to happen.
+ */
+static int idiv_dbl(unsigned long u[2], unsigned long v)
+{
+ int negu = (long)u[1] < 0, negv = (long)v < 0;
+
+ /* u = abs(u) */
+ if ( negu )
+ {
+ u[1] = ~u[1];
+ if ( (u[0] = -u[0]) == 0 )
+ u[1]++;
+ }
+
+ /* abs(u) / abs(v) */
+ if ( div_dbl(u, negv ? -v : v) )
+ return 1;
+
+ /* Remainder has same sign as dividend. It cannot overflow. */
+ if ( negu )
+ u[1] = -u[1];
+
+ /* Quotient is overflowed if sign bit is set. */
+ if ( negu ^ negv )
+ {
+ if ( (long)u[0] >= 0 )
+ u[0] = -u[0];
+ else if ( (u[0] << 1) != 0 ) /* == 0x80...0 is okay */
+ return 1;
+ }
+ else if ( (long)u[0] < 0 )
+ return 1;
+
+ return 0;
+}
+
+static int
+test_cc(
+ unsigned int condition, unsigned int flags)
+{
+ int rc = 0;
+
+ switch ( (condition & 15) >> 1 )
+ {
+ case 0: /* o */
+ rc |= (flags & EFLG_OF);
+ break;
+ case 1: /* b/c/nae */
+ rc |= (flags & EFLG_CF);
+ break;
+ case 2: /* z/e */
+ rc |= (flags & EFLG_ZF);
+ break;
+ case 3: /* be/na */
+ rc |= (flags & (EFLG_CF|EFLG_ZF));
+ break;
+ case 4: /* s */
+ rc |= (flags & EFLG_SF);
+ break;
+ case 5: /* p/pe */
+ rc |= (flags & EFLG_PF);
+ break;
+ case 7: /* le/ng */
+ rc |= (flags & EFLG_ZF);
+ /* fall through */
+ case 6: /* l/nge */
+ rc |= (!(flags & EFLG_SF) != !(flags & EFLG_OF));
+ break;
+ }
+
+ /* Odd condition identifiers (lsb == 1) have inverted sense. */
+ return (!!rc ^ (condition & 1));
+}
+
+static int
+get_cpl(
+ struct x86_emulate_ctxt *ctxt,
+ struct x86_emulate_ops *ops)
+{
+ struct segment_register reg;
+
+ if ( ctxt->regs->eflags & EFLG_VM )
+ return 3;
+
+ if ( (ops->read_segment == NULL) ||
+ ops->read_segment(x86_seg_ss, ®, ctxt) )
+ return -1;
+
+ return reg.attr.fields.dpl;
+}
+
+static int
+_mode_iopl(
+ struct x86_emulate_ctxt *ctxt,
+ struct x86_emulate_ops *ops)
+{
+ int cpl = get_cpl(ctxt, ops);
+ if ( cpl == -1 )
+ return -1;
+ return (cpl <= ((ctxt->regs->eflags >> 12) & 3));
+}
+
+#define mode_ring0() ({ \
+ int _cpl = get_cpl(ctxt, ops); \
+ fail_if(_cpl < 0); \
+ (_cpl == 0); \
+})
+#define mode_iopl() ({ \
+ int _iopl = _mode_iopl(ctxt, ops); \
+ fail_if(_iopl < 0); \
+ _iopl; \
+})
+
+static int ioport_access_check(
+ unsigned int first_port,
+ unsigned int bytes,
+ struct x86_emulate_ctxt *ctxt,
+ struct x86_emulate_ops *ops)
+{
+ unsigned long iobmp;
+ struct segment_register tr;
+ int rc = X86EMUL_OKAY;
+
+ if ( !(ctxt->regs->eflags & EFLG_VM) && mode_iopl() )
+ return X86EMUL_OKAY;
+
+ fail_if(ops->read_segment == NULL);
+ if ( (rc = ops->read_segment(x86_seg_tr, &tr, ctxt)) != 0 )
+ return rc;
+
+ /* Ensure that the TSS is valid and has an io-bitmap-offset field. */
+ if ( !tr.attr.fields.p ||
+ ((tr.attr.fields.type & 0xd) != 0x9) ||
+ (tr.limit < 0x67) )
+ goto raise_exception;
+
+ if ( (rc = ops->read(x86_seg_none, tr.base + 0x66, &iobmp, 2, ctxt)) )
+ return rc;
+
+ /* Ensure TSS includes two bytes including byte containing first port. */
+ iobmp += first_port / 8;
+ if ( tr.limit <= iobmp )
+ goto raise_exception;
+
+ if ( (rc = ops->read(x86_seg_none, tr.base + iobmp, &iobmp, 2, ctxt)) )
+ return rc;
+ if ( (iobmp & (((1<<bytes)-1) << (first_port&7))) != 0 )
+ goto raise_exception;
+
+ done:
+ return rc;
+
+ raise_exception:
+ fail_if(ops->inject_hw_exception == NULL);
+ return ops->inject_hw_exception(EXC_GP, 0, ctxt) ? : X86EMUL_EXCEPTION;
+}
+
+static int
+in_realmode(
+ struct x86_emulate_ctxt *ctxt,
+ struct x86_emulate_ops *ops)
+{
+ unsigned long cr0;
+ int rc;
+
+ if ( ops->read_cr == NULL )
+ return 0;
+
+ rc = ops->read_cr(0, &cr0, ctxt);
+ return (!rc && !(cr0 & CR0_PE));
+}
+
+static int
+realmode_load_seg(
+ enum x86_segment seg,
+ uint16_t sel,
+ struct x86_emulate_ctxt *ctxt,
+ struct x86_emulate_ops *ops)
+{
+ struct segment_register reg;
+ int rc;
+
+ if ( (rc = ops->read_segment(seg, ®, ctxt)) != 0 )
+ return rc;
+
+ reg.sel = sel;
+ reg.base = (uint32_t)sel << 4;
+
+ return ops->write_segment(seg, ®, ctxt);
+}
+
+static int
+protmode_load_seg(
+ enum x86_segment seg,
+ uint16_t sel,
+ struct x86_emulate_ctxt *ctxt,
+ struct x86_emulate_ops *ops)
+{
+ struct segment_register desctab, cs, segr;
+ struct { uint32_t a, b; } desc;
+ unsigned long val;
+ uint8_t dpl, rpl, cpl;
+ int rc, fault_type = EXC_TS;
+
+ /* NULL selector? */
+ if ( (sel & 0xfffc) == 0 )
+ {
+ if ( (seg == x86_seg_cs) || (seg == x86_seg_ss) )
+ goto raise_exn;
+ memset(&segr, 0, sizeof(segr));
+ return ops->write_segment(seg, &segr, ctxt);
+ }
+
+ /* LDT descriptor must be in the GDT. */
+ if ( (seg == x86_seg_ldtr) && (sel & 4) )
+ goto raise_exn;
+
+ if ( (rc = ops->read_segment(x86_seg_cs, &cs, ctxt)) ||
+ (rc = ops->read_segment((sel & 4) ? x86_seg_ldtr : x86_seg_gdtr,
+ &desctab, ctxt)) )
+ return rc;
+
+ /* Check against descriptor table limit. */
+ if ( ((sel & 0xfff8) + 7) > desctab.limit )
+ goto raise_exn;
+
+ do {
+ if ( (rc = ops->read(x86_seg_none, desctab.base + (sel & 0xfff8),
+ &val, 4, ctxt)) )
+ return rc;
+ desc.a = val;
+ if ( (rc = ops->read(x86_seg_none, desctab.base + (sel & 0xfff8) + 4,
+ &val, 4, ctxt)) )
+ return rc;
+ desc.b = val;
+
+ /* Segment present in memory? */
+ if ( !(desc.b & (1u<<15)) )
+ {
+ fault_type = EXC_NP;
+ goto raise_exn;
+ }
+
+ /* LDT descriptor is a system segment. All others are code/data. */
+ if ( (desc.b & (1u<<12)) == ((seg == x86_seg_ldtr) << 12) )
+ goto raise_exn;
+
+ dpl = (desc.b >> 13) & 3;
+ rpl = sel & 3;
+ cpl = cs.sel & 3;
+
+ switch ( seg )
+ {
+ case x86_seg_cs:
+ /* Code segment? */
+ if ( !(desc.b & (1u<<11)) )
+ goto raise_exn;
+ /* Non-conforming segment: check DPL against RPL. */
+ if ( ((desc.b & (6u<<9)) != 6) && (dpl != rpl) )
+ goto raise_exn;
+ break;
+ case x86_seg_ss:
+ /* Writable data segment? */
+ if ( (desc.b & (5u<<9)) != (1u<<9) )
+ goto raise_exn;
+ if ( (dpl != cpl) || (dpl != rpl) )
+ goto raise_exn;
+ break;
+ case x86_seg_ldtr:
+ /* LDT system segment? */
+ if ( (desc.b & (15u<<8)) != (2u<<8) )
+ goto raise_exn;
+ goto skip_accessed_flag;
+ default:
+ /* Readable code or data segment? */
+ if ( (desc.b & (5u<<9)) == (4u<<9) )
+ goto raise_exn;
+ /* Non-conforming segment: check DPL against RPL and CPL. */
+ if ( ((desc.b & (6u<<9)) != 6) && ((dpl < cpl) || (dpl < rpl)) )
+ goto raise_exn;
+ break;
+ }
+
+ /* Ensure Accessed flag is set. */
+ rc = ((desc.b & 0x100) ? X86EMUL_OKAY :
+ ops->cmpxchg(
+ x86_seg_none, desctab.base + (sel & 0xfff8) + 4, desc.b,
+ desc.b | 0x100, 4, ctxt));
+ } while ( rc == X86EMUL_CMPXCHG_FAILED );
+
+ if ( rc )
+ return rc;
+
+ /* Force the Accessed flag in our local copy. */
+ desc.b |= 0x100;
+
+ skip_accessed_flag:
+ segr.base = (((desc.b << 0) & 0xff000000u) |
+ ((desc.b << 16) & 0x00ff0000u) |
+ ((desc.a >> 16) & 0x0000ffffu));
+ segr.attr.bytes = (((desc.b >> 8) & 0x00ffu) |
+ ((desc.b >> 12) & 0x0f00u));
+ segr.limit = (desc.b & 0x000f0000u) | (desc.a & 0x0000ffffu);
+ if ( segr.attr.fields.g )
+ segr.limit = (segr.limit << 12) | 0xfffu;
+ segr.sel = sel;
+ return ops->write_segment(seg, &segr, ctxt);
+
+ raise_exn:
+ if ( ops->inject_hw_exception == NULL )
+ return X86EMUL_UNHANDLEABLE;
+ if ( (rc = ops->inject_hw_exception(fault_type, sel & 0xfffc, ctxt)) )
+ return rc;
+ return X86EMUL_EXCEPTION;
+}
+
+static int
+load_seg(
+ enum x86_segment seg,
+ uint16_t sel,
+ struct x86_emulate_ctxt *ctxt,
+ struct x86_emulate_ops *ops)
+{
+ if ( (ops->read_segment == NULL) ||
+ (ops->write_segment == NULL) )
+ return X86EMUL_UNHANDLEABLE;
+
+ if ( in_realmode(ctxt, ops) )
+ return realmode_load_seg(seg, sel, ctxt, ops);
+
+ return protmode_load_seg(seg, sel, ctxt, ops);
+}
+
+void *
+decode_register(
+ uint8_t modrm_reg, struct cpu_user_regs *regs, int highbyte_regs)
+{
+ void *p;
+
+ switch ( modrm_reg )
+ {
+ case 0: p = ®s->eax; break;
+ case 1: p = ®s->ecx; break;
+ case 2: p = ®s->edx; break;
+ case 3: p = ®s->ebx; break;
+ case 4: p = (highbyte_regs ?
+ ((unsigned char *)®s->eax + 1) :
+ (unsigned char *)®s->esp); break;
+ case 5: p = (highbyte_regs ?
+ ((unsigned char *)®s->ecx + 1) :
+ (unsigned char *)®s->ebp); break;
+ case 6: p = (highbyte_regs ?
+ ((unsigned char *)®s->edx + 1) :
+ (unsigned char *)®s->esi); break;
+ case 7: p = (highbyte_regs ?
+ ((unsigned char *)®s->ebx + 1) :
+ (unsigned char *)®s->edi); break;
+#if defined(__x86_64__)
+ case 8: p = ®s->r8; break;
+ case 9: p = ®s->r9; break;
+ case 10: p = ®s->r10; break;
+ case 11: p = ®s->r11; break;
+ case 12: p = ®s->r12; break;
+ case 13: p = ®s->r13; break;
+ case 14: p = ®s->r14; break;
+ case 15: p = ®s->r15; break;
+#endif
+ default: p = NULL; break;
+ }
+
+ return p;
+}
+
+#define decode_segment_failed x86_seg_tr
+enum x86_segment
+decode_segment(
+ uint8_t modrm_reg)
+{
+ switch ( modrm_reg )
+ {
+ case 0: return x86_seg_es;
+ case 1: return x86_seg_cs;
+ case 2: return x86_seg_ss;
+ case 3: return x86_seg_ds;
+ case 4: return x86_seg_fs;
+ case 5: return x86_seg_gs;
+ default: break;
+ }
+ return decode_segment_failed;
+}
+
+int
+x86_emulate(
+ struct x86_emulate_ctxt *ctxt,
+ struct x86_emulate_ops *ops)
+{
+ /* Shadow copy of register state. Committed on successful emulation. */
+ struct cpu_user_regs _regs = *ctxt->regs;
+
+ uint8_t b, d, sib, sib_index, sib_base, twobyte = 0, rex_prefix = 0;
+ uint8_t modrm = 0, modrm_mod = 0, modrm_reg = 0, modrm_rm = 0;
+ unsigned int op_bytes, def_op_bytes, ad_bytes, def_ad_bytes;
+#define REPE_PREFIX 1
+#define REPNE_PREFIX 2
+ unsigned int lock_prefix = 0, rep_prefix = 0;
+ int override_seg = -1, rc = X86EMUL_OKAY;
+ struct operand src, dst;
+
+ /* Data operand effective address (usually computed from ModRM). */
+ struct operand ea;
+
+ /* Default is a memory operand relative to segment DS. */
+ ea.type = OP_MEM;
+ ea.mem.seg = x86_seg_ds;
+ ea.mem.off = 0;
+
+ ctxt->retire.byte = 0;
+
+ op_bytes = def_op_bytes = ad_bytes = def_ad_bytes = ctxt->addr_size/8;
+ if ( op_bytes == 8 )
+ {
+ op_bytes = def_op_bytes = 4;
+#ifndef __x86_64__
+ return X86EMUL_UNHANDLEABLE;
+#endif
+ }
+
+ /* Prefix bytes. */
+ for ( ; ; )
+ {
+ switch ( b = insn_fetch_type(uint8_t) )
+ {
+ case 0x66: /* operand-size override */
+ op_bytes = def_op_bytes ^ 6;
+ break;
+ case 0x67: /* address-size override */
+ ad_bytes = def_ad_bytes ^ (mode_64bit() ? 12 : 6);
+ break;
+ case 0x2e: /* CS override */
+ override_seg = x86_seg_cs;
+ break;
+ case 0x3e: /* DS override */
+ override_seg = x86_seg_ds;
+ break;
+ case 0x26: /* ES override */
+ override_seg = x86_seg_es;
+ break;
+ case 0x64: /* FS override */
+ override_seg = x86_seg_fs;
+ break;
+ case 0x65: /* GS override */
+ override_seg = x86_seg_gs;
+ break;
+ case 0x36: /* SS override */
+ override_seg = x86_seg_ss;
+ break;
+ case 0xf0: /* LOCK */
+ lock_prefix = 1;
+ break;
+ case 0xf2: /* REPNE/REPNZ */
+ rep_prefix = REPNE_PREFIX;
+ break;
+ case 0xf3: /* REP/REPE/REPZ */
+ rep_prefix = REPE_PREFIX;
+ break;
+ case 0x40 ... 0x4f: /* REX */
+ if ( !mode_64bit() )
+ goto done_prefixes;
+ rex_prefix = b;
+ continue;
+ default:
+ goto done_prefixes;
+ }
+
+ /* Any legacy prefix after a REX prefix nullifies its effect. */
+ rex_prefix = 0;
+ }
+ done_prefixes:
+
+ if ( rex_prefix & 8 ) /* REX.W */
+ op_bytes = 8;
+
+ /* Opcode byte(s). */
+ d = opcode_table[b];
+ if ( d == 0 )
+ {
+ /* Two-byte opcode? */
+ if ( b == 0x0f )
+ {
+ twobyte = 1;
+ b = insn_fetch_type(uint8_t);
+ d = twobyte_table[b];
+ }
+
+ /* Unrecognised? */
+ if ( d == 0 )
+ goto cannot_emulate;
+ }
+
+ /* Lock prefix is allowed only on RMW instructions. */
+ generate_exception_if((d & Mov) && lock_prefix, EXC_GP, 0);
+
+ /* ModRM and SIB bytes. */
+ if ( d & ModRM )
+ {
+ modrm = insn_fetch_type(uint8_t);
+ modrm_mod = (modrm & 0xc0) >> 6;
+ modrm_reg = ((rex_prefix & 4) << 1) | ((modrm & 0x38) >> 3);
+ modrm_rm = modrm & 0x07;
+
+ if ( modrm_mod == 3 )
+ {
+ modrm_rm |= (rex_prefix & 1) << 3;
+ ea.type = OP_REG;
+ ea.reg = decode_register(
+ modrm_rm, &_regs, (d & ByteOp) && (rex_prefix == 0));
+ }
+ else if ( ad_bytes == 2 )
+ {
+ /* 16-bit ModR/M decode. */
+ switch ( modrm_rm )
+ {
+ case 0:
+ ea.mem.off = _regs.ebx + _regs.esi;
+ break;
+ case 1:
+ ea.mem.off = _regs.ebx + _regs.edi;
+ break;
+ case 2:
+ ea.mem.seg = x86_seg_ss;
+ ea.mem.off = _regs.ebp + _regs.esi;
+ break;
+ case 3:
+ ea.mem.seg = x86_seg_ss;
+ ea.mem.off = _regs.ebp + _regs.edi;
+ break;
+ case 4:
+ ea.mem.off = _regs.esi;
+ break;
+ case 5:
+ ea.mem.off = _regs.edi;
+ break;
+ case 6:
+ if ( modrm_mod == 0 )
+ break;
+ ea.mem.seg = x86_seg_ss;
+ ea.mem.off = _regs.ebp;
+ break;
+ case 7:
+ ea.mem.off = _regs.ebx;
+ break;
+ }
+ switch ( modrm_mod )
+ {
+ case 0:
+ if ( modrm_rm == 6 )
+ ea.mem.off = insn_fetch_type(int16_t);
+ break;
+ case 1:
+ ea.mem.off += insn_fetch_type(int8_t);
+ break;
+ case 2:
+ ea.mem.off += insn_fetch_type(int16_t);
+ break;
+ }
+ ea.mem.off = truncate_ea(ea.mem.off);
+ }
+ else
+ {
+ /* 32/64-bit ModR/M decode. */
+ if ( modrm_rm == 4 )
+ {
+ sib = insn_fetch_type(uint8_t);
+ sib_index = ((sib >> 3) & 7) | ((rex_prefix << 2) & 8);
+ sib_base = (sib & 7) | ((rex_prefix << 3) & 8);
+ if ( sib_index != 4 )
+ ea.mem.off = *(long*)decode_register(sib_index, &_regs, 0);
+ ea.mem.off <<= (sib >> 6) & 3;
+ if ( (modrm_mod == 0) && ((sib_base & 7) == 5) )
+ ea.mem.off += insn_fetch_type(int32_t);
+ else if ( sib_base == 4 )
+ {
+ ea.mem.seg = x86_seg_ss;
+ ea.mem.off += _regs.esp;
+ if ( !twobyte && (b == 0x8f) )
+ /* POP <rm> computes its EA post increment. */
+ ea.mem.off += ((mode_64bit() && (op_bytes == 4))
+ ? 8 : op_bytes);
+ }
+ else if ( sib_base == 5 )
+ {
+ ea.mem.seg = x86_seg_ss;
+ ea.mem.off += _regs.ebp;
+ }
+ else
+ ea.mem.off += *(long*)decode_register(sib_base, &_regs, 0);
+ }
+ else
+ {
+ modrm_rm |= (rex_prefix & 1) << 3;
+ ea.mem.off = *(long *)decode_register(modrm_rm, &_regs, 0);
+ if ( (modrm_rm == 5) && (modrm_mod != 0) )
+ ea.mem.seg = x86_seg_ss;
+ }
+ switch ( modrm_mod )
+ {
+ case 0:
+ if ( (modrm_rm & 7) != 5 )
+ break;
+ ea.mem.off = insn_fetch_type(int32_t);
+ if ( !mode_64bit() )
+ break;
+ /* Relative to RIP of next instruction. Argh! */
+ ea.mem.off += _regs.eip;
+ if ( (d & SrcMask) == SrcImm )
+ ea.mem.off += (d & ByteOp) ? 1 :
+ ((op_bytes == 8) ? 4 : op_bytes);
+ else if ( (d & SrcMask) == SrcImmByte )
+ ea.mem.off += 1;
+ else if ( !twobyte && ((b & 0xfe) == 0xf6) &&
+ ((modrm_reg & 7) <= 1) )
+ /* Special case in Grp3: test has immediate operand. */
+ ea.mem.off += (d & ByteOp) ? 1
+ : ((op_bytes == 8) ? 4 : op_bytes);
+ else if ( twobyte && ((b & 0xf7) == 0xa4) )
+ /* SHLD/SHRD with immediate byte third operand. */
+ ea.mem.off++;
+ break;
+ case 1:
+ ea.mem.off += insn_fetch_type(int8_t);
+ break;
+ case 2:
+ ea.mem.off += insn_fetch_type(int32_t);
+ break;
+ }
+ ea.mem.off = truncate_ea(ea.mem.off);
+ }
+ }
+
+ if ( override_seg != -1 )
+ ea.mem.seg = override_seg;
+
+ /* Special instructions do their own operand decoding. */
+ if ( (d & DstMask) == ImplicitOps )
+ goto special_insn;
+
+ /* Decode and fetch the source operand: register, memory or immediate. */
+ switch ( d & SrcMask )
+ {
+ case SrcNone:
+ break;
+ case SrcReg:
+ src.type = OP_REG;
+ if ( d & ByteOp )
+ {
+ src.reg = decode_register(modrm_reg, &_regs, (rex_prefix == 0));
+ src.val = *(uint8_t *)src.reg;
+ src.bytes = 1;
+ }
+ else
+ {
+ src.reg = decode_register(modrm_reg, &_regs, 0);
+ switch ( (src.bytes = op_bytes) )
+ {
+ case 2: src.val = *(uint16_t *)src.reg; break;
+ case 4: src.val = *(uint32_t *)src.reg; break;
+ case 8: src.val = *(uint64_t *)src.reg; break;
+ }
+ }
+ break;
+ case SrcMem16:
+ ea.bytes = 2;
+ goto srcmem_common;
+ case SrcMem:
+ ea.bytes = (d & ByteOp) ? 1 : op_bytes;
+ srcmem_common:
+ src = ea;
+ if ( src.type == OP_REG )
+ {
+ switch ( src.bytes )
+ {
+ case 1: src.val = *(uint8_t *)src.reg; break;
+ case 2: src.val = *(uint16_t *)src.reg; break;
+ case 4: src.val = *(uint32_t *)src.reg; break;
+ case 8: src.val = *(uint64_t *)src.reg; break;
+ }
+ }
+ else if ( (rc = ops->read(src.mem.seg, src.mem.off,
+ &src.val, src.bytes, ctxt)) )
+ goto done;
+ break;
+ case SrcImm:
+ src.type = OP_IMM;
+ src.bytes = (d & ByteOp) ? 1 : op_bytes;
+ if ( src.bytes == 8 ) src.bytes = 4;
+ /* NB. Immediates are sign-extended as necessary. */
+ switch ( src.bytes )
+ {
+ case 1: src.val = insn_fetch_type(int8_t); break;
+ case 2: src.val = insn_fetch_type(int16_t); break;
+ case 4: src.val = insn_fetch_type(int32_t); break;
+ }
+ break;
+ case SrcImmByte:
+ src.type = OP_IMM;
+ src.bytes = 1;
+ src.val = insn_fetch_type(int8_t);
+ break;
+ }
+
+ /* Decode and fetch the destination operand: register or memory. */
+ switch ( d & DstMask )
+ {
+ case DstReg:
+ dst.type = OP_REG;
+ if ( d & ByteOp )
+ {
+ dst.reg = decode_register(modrm_reg, &_regs, (rex_prefix == 0));
+ dst.val = *(uint8_t *)dst.reg;
+ dst.bytes = 1;
+ }
+ else
+ {
+ dst.reg = decode_register(modrm_reg, &_regs, 0);
+ switch ( (dst.bytes = op_bytes) )
+ {
+ case 2: dst.val = *(uint16_t *)dst.reg; break;
+ case 4: dst.val = *(uint32_t *)dst.reg; break;
+ case 8: dst.val = *(uint64_t *)dst.reg; break;
+ }
+ }
+ break;
+ case DstBitBase:
+ if ( ((d & SrcMask) == SrcImmByte) || (ea.type == OP_REG) )
+ {
+ src.val &= (op_bytes << 3) - 1;
+ }
+ else
+ {
+ /*
+ * EA += BitOffset DIV op_bytes*8
+ * BitOffset = BitOffset MOD op_bytes*8
+ * DIV truncates towards negative infinity.
+ * MOD always produces a positive result.
+ */
+ if ( op_bytes == 2 )
+ src.val = (int16_t)src.val;
+ else if ( op_bytes == 4 )
+ src.val = (int32_t)src.val;
+ if ( (long)src.val < 0 )
+ {
+ unsigned long byte_offset;
+ byte_offset = op_bytes + (((-src.val-1) >> 3) & ~(op_bytes-1));
+ ea.mem.off -= byte_offset;
+ src.val = (byte_offset << 3) + src.val;
+ }
+ else
+ {
+ ea.mem.off += (src.val >> 3) & ~(op_bytes - 1);
+ src.val &= (op_bytes << 3) - 1;
+ }
+ }
+ /* Becomes a normal DstMem operation from here on. */
+ d = (d & ~DstMask) | DstMem;
+ case DstMem:
+ ea.bytes = (d & ByteOp) ? 1 : op_bytes;
+ dst = ea;
+ if ( dst.type == OP_REG )
+ {
+ switch ( dst.bytes )
+ {
+ case 1: dst.val = *(uint8_t *)dst.reg; break;
+ case 2: dst.val = *(uint16_t *)dst.reg; break;
+ case 4: dst.val = *(uint32_t *)dst.reg; break;
+ case 8: dst.val = *(uint64_t *)dst.reg; break;
+ }
+ }
+ else if ( !(d & Mov) ) /* optimisation - avoid slow emulated read */
+ {
+ if ( (rc = ops->read(dst.mem.seg, dst.mem.off,
+ &dst.val, dst.bytes, ctxt)) )
+ goto done;
+ dst.orig_val = dst.val;
+ }
+ break;
+ }
+
+ /* LOCK prefix allowed only on instructions with memory destination. */
+ generate_exception_if(lock_prefix && (dst.type != OP_MEM), EXC_GP, 0);
+
+ if ( twobyte )
+ goto twobyte_insn;
+
+ switch ( b )
+ {
+ case 0x04 ... 0x05: /* add imm,%%eax */
+ dst.reg = (unsigned long *)&_regs.eax;
+ dst.val = _regs.eax;
+ case 0x00 ... 0x03: add: /* add */
+ emulate_2op_SrcV("add", src, dst, _regs.eflags);
+ break;
+
+ case 0x0c ... 0x0d: /* or imm,%%eax */
+ dst.reg = (unsigned long *)&_regs.eax;
+ dst.val = _regs.eax;
+ case 0x08 ... 0x0b: or: /* or */
+ emulate_2op_SrcV("or", src, dst, _regs.eflags);
+ break;
+
+ case 0x14 ... 0x15: /* adc imm,%%eax */
+ dst.reg = (unsigned long *)&_regs.eax;
+ dst.val = _regs.eax;
+ case 0x10 ... 0x13: adc: /* adc */
+ emulate_2op_SrcV("adc", src, dst, _regs.eflags);
+ break;
+
+ case 0x1c ... 0x1d: /* sbb imm,%%eax */
+ dst.reg = (unsigned long *)&_regs.eax;
+ dst.val = _regs.eax;
+ case 0x18 ... 0x1b: sbb: /* sbb */
+ emulate_2op_SrcV("sbb", src, dst, _regs.eflags);
+ break;
+
+ case 0x24 ... 0x25: /* and imm,%%eax */
+ dst.reg = (unsigned long *)&_regs.eax;
+ dst.val = _regs.eax;
+ case 0x20 ... 0x23: and: /* and */
+ emulate_2op_SrcV("and", src, dst, _regs.eflags);
+ break;
+
+ case 0x2c ... 0x2d: /* sub imm,%%eax */
+ dst.reg = (unsigned long *)&_regs.eax;
+ dst.val = _regs.eax;
+ case 0x28 ... 0x2b: sub: /* sub */
+ emulate_2op_SrcV("sub", src, dst, _regs.eflags);
+ break;
+
+ case 0x34 ... 0x35: /* xor imm,%%eax */
+ dst.reg = (unsigned long *)&_regs.eax;
+ dst.val = _regs.eax;
+ case 0x30 ... 0x33: xor: /* xor */
+ emulate_2op_SrcV("xor", src, dst, _regs.eflags);
+ break;
+
+ case 0x3c ... 0x3d: /* cmp imm,%%eax */
+ dst.reg = (unsigned long *)&_regs.eax;
+ dst.val = _regs.eax;
+ case 0x38 ... 0x3b: cmp: /* cmp */
+ emulate_2op_SrcV("cmp", src, dst, _regs.eflags);
+ break;
+
+ case 0x62: /* bound */ {
+ unsigned long src_val2;
+ int lb, ub, idx;
+ generate_exception_if(mode_64bit() || (src.type != OP_MEM),
+ EXC_UD, -1);
+ if ( (rc = ops->read(src.mem.seg, src.mem.off + op_bytes,
+ &src_val2, op_bytes, ctxt)) )
+ goto done;
+ ub = (op_bytes == 2) ? (int16_t)src_val2 : (int32_t)src_val2;
+ lb = (op_bytes == 2) ? (int16_t)src.val : (int32_t)src.val;
+ idx = (op_bytes == 2) ? (int16_t)dst.val : (int32_t)dst.val;
+ generate_exception_if((idx < lb) || (idx > ub), EXC_BR, -1);
+ dst.type = OP_NONE;
+ break;
+ }
+
+ case 0x63: /* movsxd (x86/64) / arpl (x86/32) */
+ if ( mode_64bit() )
+ {
+ /* movsxd */
+ if ( src.type == OP_REG )
+ src.val = *(int32_t *)src.reg;
+ else if ( (rc = ops->read(src.mem.seg, src.mem.off,
+ &src.val, 4, ctxt)) )
+ goto done;
+ dst.val = (int32_t)src.val;
+ }
+ else
+ {
+ /* arpl */
+ uint16_t src_val = dst.val;
+ dst = src;
+ _regs.eflags &= ~EFLG_ZF;
+ _regs.eflags |= ((src_val & 3) > (dst.val & 3)) ? EFLG_ZF : 0;
+ if ( _regs.eflags & EFLG_ZF )
+ dst.val = (dst.val & ~3) | (src_val & 3);
+ else
+ dst.type = OP_NONE;
+ generate_exception_if(in_realmode(ctxt, ops), EXC_UD, -1);
+ }
+ break;
+
+ case 0x69: /* imul imm16/32 */
+ case 0x6b: /* imul imm8 */ {
+ unsigned long src1; /* ModR/M source operand */
+ if ( ea.type == OP_REG )
+ src1 = *ea.reg;
+ else if ( (rc = ops->read(ea.mem.seg, ea.mem.off,
+ &src1, op_bytes, ctxt)) )
+ goto done;
+ _regs.eflags &= ~(EFLG_OF|EFLG_CF);
+ switch ( dst.bytes )
+ {
+ case 2:
+ dst.val = ((uint32_t)(int16_t)src.val *
+ (uint32_t)(int16_t)src1);
+ if ( (int16_t)dst.val != (uint32_t)dst.val )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ break;
+#ifdef __x86_64__
+ case 4:
+ dst.val = ((uint64_t)(int32_t)src.val *
+ (uint64_t)(int32_t)src1);
+ if ( (int32_t)dst.val != dst.val )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ break;
+#endif
+ default: {
+ unsigned long m[2] = { src.val, src1 };
+ if ( imul_dbl(m) )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ dst.val = m[0];
+ break;
+ }
+ }
+ break;
+ }
+
+ case 0x82: /* Grp1 (x86/32 only) */
+ generate_exception_if(mode_64bit(), EXC_UD, -1);
+ case 0x80: case 0x81: case 0x83: /* Grp1 */
+ switch ( modrm_reg & 7 )
+ {
+ case 0: goto add;
+ case 1: goto or;
+ case 2: goto adc;
+ case 3: goto sbb;
+ case 4: goto and;
+ case 5: goto sub;
+ case 6: goto xor;
+ case 7: goto cmp;
+ }
+ break;
+
+ case 0xa8 ... 0xa9: /* test imm,%%eax */
+ dst.reg = (unsigned long *)&_regs.eax;
+ dst.val = _regs.eax;
+ case 0x84 ... 0x85: test: /* test */
+ emulate_2op_SrcV("test", src, dst, _regs.eflags);
+ break;
+
+ case 0x86 ... 0x87: xchg: /* xchg */
+ /* Write back the register source. */
+ switch ( dst.bytes )
+ {
+ case 1: *(uint8_t *)src.reg = (uint8_t)dst.val; break;
+ case 2: *(uint16_t *)src.reg = (uint16_t)dst.val; break;
+ case 4: *src.reg = (uint32_t)dst.val; break; /* 64b reg: zero-extend */
+ case 8: *src.reg = dst.val; break;
+ }
+ /* Write back the memory destination with implicit LOCK prefix. */
+ dst.val = src.val;
+ lock_prefix = 1;
+ break;
+
+ case 0xc6 ... 0xc7: /* mov (sole member of Grp11) */
+ generate_exception_if((modrm_reg & 7) != 0, EXC_UD, -1);
+ case 0x88 ... 0x8b: /* mov */
+ dst.val = src.val;
+ break;
+
+ case 0x8c: /* mov Sreg,r/m */ {
+ struct segment_register reg;
+ enum x86_segment seg = decode_segment(modrm_reg);
+ generate_exception_if(seg == decode_segment_failed, EXC_UD, -1);
+ fail_if(ops->read_segment == NULL);
+ if ( (rc = ops->read_segment(seg, ®, ctxt)) != 0 )
+ goto done;
+ dst.val = reg.sel;
+ if ( dst.type == OP_MEM )
+ dst.bytes = 2;
+ break;
+ }
+
+ case 0x8e: /* mov r/m,Sreg */ {
+ enum x86_segment seg = decode_segment(modrm_reg);
+ generate_exception_if(seg == decode_segment_failed, EXC_UD, -1);
+ if ( (rc = load_seg(seg, (uint16_t)src.val, ctxt, ops)) != 0 )
+ goto done;
+ if ( seg == x86_seg_ss )
+ ctxt->retire.flags.mov_ss = 1;
+ dst.type = OP_NONE;
+ break;
+ }
+
+ case 0x8d: /* lea */
+ dst.val = ea.mem.off;
+ break;
+
+ case 0x8f: /* pop (sole member of Grp1a) */
+ generate_exception_if((modrm_reg & 7) != 0, EXC_UD, -1);
+ /* 64-bit mode: POP defaults to a 64-bit operand. */
+ if ( mode_64bit() && (dst.bytes == 4) )
+ dst.bytes = 8;
+ if ( (rc = ops->read(x86_seg_ss, sp_post_inc(dst.bytes),
+ &dst.val, dst.bytes, ctxt)) != 0 )
+ goto done;
+ break;
+
+ case 0xb0 ... 0xb7: /* mov imm8,r8 */
+ dst.reg = decode_register(
+ (b & 7) | ((rex_prefix & 1) << 3), &_regs, (rex_prefix == 0));
+ dst.val = src.val;
+ break;
+
+ case 0xb8 ... 0xbf: /* mov imm{16,32,64},r{16,32,64} */
+ if ( dst.bytes == 8 ) /* Fetch more bytes to obtain imm64 */
+ src.val = ((uint32_t)src.val |
+ ((uint64_t)insn_fetch_type(uint32_t) << 32));
+ dst.reg = decode_register(
+ (b & 7) | ((rex_prefix & 1) << 3), &_regs, 0);
+ dst.val = src.val;
+ break;
+
+ case 0xc0 ... 0xc1: grp2: /* Grp2 */
+ switch ( modrm_reg & 7 )
+ {
+ case 0: /* rol */
+ emulate_2op_SrcB("rol", src, dst, _regs.eflags);
+ break;
+ case 1: /* ror */
+ emulate_2op_SrcB("ror", src, dst, _regs.eflags);
+ break;
+ case 2: /* rcl */
+ emulate_2op_SrcB("rcl", src, dst, _regs.eflags);
+ break;
+ case 3: /* rcr */
+ emulate_2op_SrcB("rcr", src, dst, _regs.eflags);
+ break;
+ case 4: /* sal/shl */
+ case 6: /* sal/shl */
+ emulate_2op_SrcB("sal", src, dst, _regs.eflags);
+ break;
+ case 5: /* shr */
+ emulate_2op_SrcB("shr", src, dst, _regs.eflags);
+ break;
+ case 7: /* sar */
+ emulate_2op_SrcB("sar", src, dst, _regs.eflags);
+ break;
+ }
+ break;
+
+ case 0xc4: /* les */ {
+ unsigned long sel;
+ dst.val = x86_seg_es;
+ les: /* dst.val identifies the segment */
+ generate_exception_if(src.type != OP_MEM, EXC_UD, -1);
+ if ( (rc = ops->read(src.mem.seg, src.mem.off + src.bytes,
+ &sel, 2, ctxt)) != 0 )
+ goto done;
+ if ( (rc = load_seg(dst.val, (uint16_t)sel, ctxt, ops)) != 0 )
+ goto done;
+ dst.val = src.val;
+ break;
+ }
+
+ case 0xc5: /* lds */
+ dst.val = x86_seg_ds;
+ goto les;
+
+ case 0xd0 ... 0xd1: /* Grp2 */
+ src.val = 1;
+ goto grp2;
+
+ case 0xd2 ... 0xd3: /* Grp2 */
+ src.val = _regs.ecx;
+ goto grp2;
+
+ case 0xf6 ... 0xf7: /* Grp3 */
+ switch ( modrm_reg & 7 )
+ {
+ case 0 ... 1: /* test */
+ /* Special case in Grp3: test has an immediate source operand. */
+ src.type = OP_IMM;
+ src.bytes = (d & ByteOp) ? 1 : op_bytes;
+ if ( src.bytes == 8 ) src.bytes = 4;
+ switch ( src.bytes )
+ {
+ case 1: src.val = insn_fetch_type(int8_t); break;
+ case 2: src.val = insn_fetch_type(int16_t); break;
+ case 4: src.val = insn_fetch_type(int32_t); break;
+ }
+ goto test;
+ case 2: /* not */
+ dst.val = ~dst.val;
+ break;
+ case 3: /* neg */
+ emulate_1op("neg", dst, _regs.eflags);
+ break;
+ case 4: /* mul */
+ src = dst;
+ dst.type = OP_REG;
+ dst.reg = (unsigned long *)&_regs.eax;
+ dst.val = *dst.reg;
+ _regs.eflags &= ~(EFLG_OF|EFLG_CF);
+ switch ( src.bytes )
+ {
+ case 1:
+ dst.val = (uint8_t)dst.val;
+ dst.val *= src.val;
+ if ( (uint8_t)dst.val != (uint16_t)dst.val )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ dst.bytes = 2;
+ break;
+ case 2:
+ dst.val = (uint16_t)dst.val;
+ dst.val *= src.val;
+ if ( (uint16_t)dst.val != (uint32_t)dst.val )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ *(uint16_t *)&_regs.edx = dst.val >> 16;
+ break;
+#ifdef __x86_64__
+ case 4:
+ dst.val = (uint32_t)dst.val;
+ dst.val *= src.val;
+ if ( (uint32_t)dst.val != dst.val )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ _regs.edx = (uint32_t)(dst.val >> 32);
+ break;
+#endif
+ default: {
+ unsigned long m[2] = { src.val, dst.val };
+ if ( mul_dbl(m) )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ _regs.edx = m[1];
+ dst.val = m[0];
+ break;
+ }
+ }
+ break;
+ case 5: /* imul */
+ src = dst;
+ dst.type = OP_REG;
+ dst.reg = (unsigned long *)&_regs.eax;
+ dst.val = *dst.reg;
+ _regs.eflags &= ~(EFLG_OF|EFLG_CF);
+ switch ( src.bytes )
+ {
+ case 1:
+ dst.val = ((uint16_t)(int8_t)src.val *
+ (uint16_t)(int8_t)dst.val);
+ if ( (int8_t)dst.val != (uint16_t)dst.val )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ dst.bytes = 2;
+ break;
+ case 2:
+ dst.val = ((uint32_t)(int16_t)src.val *
+ (uint32_t)(int16_t)dst.val);
+ if ( (int16_t)dst.val != (uint32_t)dst.val )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ *(uint16_t *)&_regs.edx = dst.val >> 16;
+ break;
+#ifdef __x86_64__
+ case 4:
+ dst.val = ((uint64_t)(int32_t)src.val *
+ (uint64_t)(int32_t)dst.val);
+ if ( (int32_t)dst.val != dst.val )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ _regs.edx = (uint32_t)(dst.val >> 32);
+ break;
+#endif
+ default: {
+ unsigned long m[2] = { src.val, dst.val };
+ if ( imul_dbl(m) )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ _regs.edx = m[1];
+ dst.val = m[0];
+ break;
+ }
+ }
+ break;
+ case 6: /* div */ {
+ unsigned long u[2], v;
+ src = dst;
+ dst.type = OP_REG;
+ dst.reg = (unsigned long *)&_regs.eax;
+ switch ( src.bytes )
+ {
+ case 1:
+ u[0] = (uint16_t)_regs.eax;
+ u[1] = 0;
+ v = (uint8_t)src.val;
+ generate_exception_if(
+ div_dbl(u, v) || ((uint8_t)u[0] != (uint16_t)u[0]),
+ EXC_DE, -1);
+ dst.val = (uint8_t)u[0];
+ ((uint8_t *)&_regs.eax)[1] = u[1];
+ break;
+ case 2:
+ u[0] = ((uint32_t)_regs.edx << 16) | (uint16_t)_regs.eax;
+ u[1] = 0;
+ v = (uint16_t)src.val;
+ generate_exception_if(
+ div_dbl(u, v) || ((uint16_t)u[0] != (uint32_t)u[0]),
+ EXC_DE, -1);
+ dst.val = (uint16_t)u[0];
+ *(uint16_t *)&_regs.edx = u[1];
+ break;
+#ifdef __x86_64__
+ case 4:
+ u[0] = (_regs.edx << 32) | (uint32_t)_regs.eax;
+ u[1] = 0;
+ v = (uint32_t)src.val;
+ generate_exception_if(
+ div_dbl(u, v) || ((uint32_t)u[0] != u[0]),
+ EXC_DE, -1);
+ dst.val = (uint32_t)u[0];
+ _regs.edx = (uint32_t)u[1];
+ break;
+#endif
+ default:
+ u[0] = _regs.eax;
+ u[1] = _regs.edx;
+ v = src.val;
+ generate_exception_if(div_dbl(u, v), EXC_DE, -1);
+ dst.val = u[0];
+ _regs.edx = u[1];
+ break;
+ }
+ break;
+ }
+ case 7: /* idiv */ {
+ unsigned long u[2], v;
+ src = dst;
+ dst.type = OP_REG;
+ dst.reg = (unsigned long *)&_regs.eax;
+ switch ( src.bytes )
+ {
+ case 1:
+ u[0] = (int16_t)_regs.eax;
+ u[1] = ((long)u[0] < 0) ? ~0UL : 0UL;
+ v = (int8_t)src.val;
+ generate_exception_if(
+ idiv_dbl(u, v) || ((int8_t)u[0] != (int16_t)u[0]),
+ EXC_DE, -1);
+ dst.val = (int8_t)u[0];
+ ((int8_t *)&_regs.eax)[1] = u[1];
+ break;
+ case 2:
+ u[0] = (int32_t)((_regs.edx << 16) | (uint16_t)_regs.eax);
+ u[1] = ((long)u[0] < 0) ? ~0UL : 0UL;
+ v = (int16_t)src.val;
+ generate_exception_if(
+ idiv_dbl(u, v) || ((int16_t)u[0] != (int32_t)u[0]),
+ EXC_DE, -1);
+ dst.val = (int16_t)u[0];
+ *(int16_t *)&_regs.edx = u[1];
+ break;
+#ifdef __x86_64__
+ case 4:
+ u[0] = (_regs.edx << 32) | (uint32_t)_regs.eax;
+ u[1] = ((long)u[0] < 0) ? ~0UL : 0UL;
+ v = (int32_t)src.val;
+ generate_exception_if(
+ idiv_dbl(u, v) || ((int32_t)u[0] != u[0]),
+ EXC_DE, -1);
+ dst.val = (int32_t)u[0];
+ _regs.edx = (uint32_t)u[1];
+ break;
+#endif
+ default:
+ u[0] = _regs.eax;
+ u[1] = _regs.edx;
+ v = src.val;
+ generate_exception_if(idiv_dbl(u, v), EXC_DE, -1);
+ dst.val = u[0];
+ _regs.edx = u[1];
+ break;
+ }
+ break;
+ }
+ default:
+ goto cannot_emulate;
+ }
+ break;
+
+ case 0xfe: /* Grp4 */
+ generate_exception_if((modrm_reg & 7) >= 2, EXC_UD, -1);
+ case 0xff: /* Grp5 */
+ switch ( modrm_reg & 7 )
+ {
+ case 0: /* inc */
+ emulate_1op("inc", dst, _regs.eflags);
+ break;
+ case 1: /* dec */
+ emulate_1op("dec", dst, _regs.eflags);
+ break;
+ case 2: /* call (near) */
+ case 4: /* jmp (near) */
+ if ( (dst.bytes != 8) && mode_64bit() )
+ {
+ dst.bytes = op_bytes = 8;
+ if ( dst.type == OP_REG )
+ dst.val = *dst.reg;
+ else if ( (rc = ops->read(dst.mem.seg, dst.mem.off,
+ &dst.val, 8, ctxt)) != 0 )
+ goto done;
+ }
+ src.val = _regs.eip;
+ _regs.eip = dst.val;
+ if ( (modrm_reg & 7) == 2 )
+ goto push; /* call */
+ dst.type = OP_NONE;
+ break;
+ case 3: /* call (far, absolute indirect) */
+ case 5: /* jmp (far, absolute indirect) */ {
+ unsigned long sel;
+
+ generate_exception_if(dst.type != OP_MEM, EXC_UD, -1);
+
+ if ( (rc = ops->read(dst.mem.seg, dst.mem.off+dst.bytes,
+ &sel, 2, ctxt)) )
+ goto done;
+
+ if ( (modrm_reg & 7) == 3 ) /* call */
+ {
+ struct segment_register reg;
+ fail_if(ops->read_segment == NULL);
+ if ( (rc = ops->read_segment(x86_seg_cs, ®, ctxt)) ||
+ (rc = ops->write(x86_seg_ss, sp_pre_dec(op_bytes),
+ reg.sel, op_bytes, ctxt)) ||
+ (rc = ops->write(x86_seg_ss, sp_pre_dec(op_bytes),
+ _regs.eip, op_bytes, ctxt)) )
+ goto done;
+ }
+
+ if ( (rc = load_seg(x86_seg_cs, sel, ctxt, ops)) != 0 )
+ goto done;
+ _regs.eip = dst.val;
+
+ dst.type = OP_NONE;
+ break;
+ }
+ case 6: /* push */
+ /* 64-bit mode: PUSH defaults to a 64-bit operand. */
+ if ( mode_64bit() && (dst.bytes == 4) )
+ {
+ dst.bytes = 8;
+ if ( dst.type == OP_REG )
+ dst.val = *dst.reg;
+ else if ( (rc = ops->read(dst.mem.seg, dst.mem.off,
+ &dst.val, 8, ctxt)) != 0 )
+ goto done;
+ }
+ if ( (rc = ops->write(x86_seg_ss, sp_pre_dec(dst.bytes),
+ dst.val, dst.bytes, ctxt)) != 0 )
+ goto done;
+ dst.type = OP_NONE;
+ break;
+ case 7:
+ generate_exception_if(1, EXC_UD, -1);
+ default:
+ goto cannot_emulate;
+ }
+ break;
+ }
+
+ writeback:
+ switch ( dst.type )
+ {
+ case OP_REG:
+ /* The 4-byte case *is* correct: in 64-bit mode we zero-extend. */
+ switch ( dst.bytes )
+ {
+ case 1: *(uint8_t *)dst.reg = (uint8_t)dst.val; break;
+ case 2: *(uint16_t *)dst.reg = (uint16_t)dst.val; break;
+ case 4: *dst.reg = (uint32_t)dst.val; break; /* 64b: zero-ext */
+ case 8: *dst.reg = dst.val; break;
+ }
+ break;
+ case OP_MEM:
+ if ( !(d & Mov) && (dst.orig_val == dst.val) &&
+ !ctxt->force_writeback )
+ /* nothing to do */;
+ else if ( lock_prefix )
+ rc = ops->cmpxchg(
+ dst.mem.seg, dst.mem.off, dst.orig_val,
+ dst.val, dst.bytes, ctxt);
+ else
+ rc = ops->write(
+ dst.mem.seg, dst.mem.off, dst.val, dst.bytes, ctxt);
+ if ( rc != 0 )
+ goto done;
+ default:
+ break;
+ }
+
+ /* Commit shadow register state. */
+ _regs.eflags &= ~EFLG_RF;
+ *ctxt->regs = _regs;
+ if ( (_regs.eflags & EFLG_TF) && (rc == X86EMUL_OKAY) &&
+ (ops->inject_hw_exception != NULL) )
+ rc = ops->inject_hw_exception(EXC_DB, -1, ctxt) ? : X86EMUL_EXCEPTION;
+
+ done:
+ return rc;
+
+ special_insn:
+ dst.type = OP_NONE;
+
+ /*
+ * The only implicit-operands instructions allowed a LOCK prefix are
+ * CMPXCHG{8,16}B, MOV CRn, MOV DRn.
+ */
+ generate_exception_if(lock_prefix &&
+ ((b < 0x20) || (b > 0x23)) && /* MOV CRn/DRn */
+ (b != 0xc7), /* CMPXCHG{8,16}B */
+ EXC_GP, 0);
+
+ if ( twobyte )
+ goto twobyte_special_insn;
+
+ switch ( b )
+ {
+ case 0x06: /* push %%es */ {
+ struct segment_register reg;
+ src.val = x86_seg_es;
+ push_seg:
+ fail_if(ops->read_segment == NULL);
+ if ( (rc = ops->read_segment(src.val, ®, ctxt)) != 0 )
+ return rc;
+ /* 64-bit mode: PUSH defaults to a 64-bit operand. */
+ if ( mode_64bit() && (op_bytes == 4) )
+ op_bytes = 8;
+ if ( (rc = ops->write(x86_seg_ss, sp_pre_dec(op_bytes),
+ reg.sel, op_bytes, ctxt)) != 0 )
+ goto done;
+ break;
+ }
+
+ case 0x07: /* pop %%es */
+ src.val = x86_seg_es;
+ pop_seg:
+ fail_if(ops->write_segment == NULL);
+ /* 64-bit mode: POP defaults to a 64-bit operand. */
+ if ( mode_64bit() && (op_bytes == 4) )
+ op_bytes = 8;
+ if ( (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
+ &dst.val, op_bytes, ctxt)) != 0 )
+ goto done;
+ if ( (rc = load_seg(src.val, (uint16_t)dst.val, ctxt, ops)) != 0 )
+ return rc;
+ break;
+
+ case 0x0e: /* push %%cs */
+ src.val = x86_seg_cs;
+ goto push_seg;
+
+ case 0x16: /* push %%ss */
+ src.val = x86_seg_ss;
+ goto push_seg;
+
+ case 0x17: /* pop %%ss */
+ src.val = x86_seg_ss;
+ ctxt->retire.flags.mov_ss = 1;
+ goto pop_seg;
+
+ case 0x1e: /* push %%ds */
+ src.val = x86_seg_ds;
+ goto push_seg;
+
+ case 0x1f: /* pop %%ds */
+ src.val = x86_seg_ds;
+ goto pop_seg;
+
+ case 0x27: /* daa */ {
+ uint8_t al = _regs.eax;
+ unsigned long eflags = _regs.eflags;
+ generate_exception_if(mode_64bit(), EXC_UD, -1);
+ _regs.eflags &= ~(EFLG_CF|EFLG_AF);
+ if ( ((al & 0x0f) > 9) || (eflags & EFLG_AF) )
+ {
+ *(uint8_t *)&_regs.eax += 6;
+ _regs.eflags |= EFLG_AF;
+ }
+ if ( (al > 0x99) || (eflags & EFLG_CF) )
+ {
+ *(uint8_t *)&_regs.eax += 0x60;
+ _regs.eflags |= EFLG_CF;
+ }
+ _regs.eflags &= ~(EFLG_SF|EFLG_ZF|EFLG_PF);
+ _regs.eflags |= ((uint8_t)_regs.eax == 0) ? EFLG_ZF : 0;
+ _regs.eflags |= (( int8_t)_regs.eax < 0) ? EFLG_SF : 0;
+ _regs.eflags |= even_parity(_regs.eax) ? EFLG_PF : 0;
+ break;
+ }
+
+ case 0x2f: /* das */ {
+ uint8_t al = _regs.eax;
+ unsigned long eflags = _regs.eflags;
+ generate_exception_if(mode_64bit(), EXC_UD, -1);
+ _regs.eflags &= ~(EFLG_CF|EFLG_AF);
+ if ( ((al & 0x0f) > 9) || (eflags & EFLG_AF) )
+ {
+ _regs.eflags |= EFLG_AF;
+ if ( (al < 6) || (eflags & EFLG_CF) )
+ _regs.eflags |= EFLG_CF;
+ *(uint8_t *)&_regs.eax -= 6;
+ }
+ if ( (al > 0x99) || (eflags & EFLG_CF) )
+ {
+ *(uint8_t *)&_regs.eax -= 0x60;
+ _regs.eflags |= EFLG_CF;
+ }
+ _regs.eflags &= ~(EFLG_SF|EFLG_ZF|EFLG_PF);
+ _regs.eflags |= ((uint8_t)_regs.eax == 0) ? EFLG_ZF : 0;
+ _regs.eflags |= (( int8_t)_regs.eax < 0) ? EFLG_SF : 0;
+ _regs.eflags |= even_parity(_regs.eax) ? EFLG_PF : 0;
+ break;
+ }
+
+ case 0x37: /* aaa */
+ case 0x3f: /* aas */
+ generate_exception_if(mode_64bit(), EXC_UD, -1);
+ _regs.eflags &= ~EFLG_CF;
+ if ( ((uint8_t)_regs.eax > 9) || (_regs.eflags & EFLG_AF) )
+ {
+ ((uint8_t *)&_regs.eax)[0] += (b == 0x37) ? 6 : -6;
+ ((uint8_t *)&_regs.eax)[1] += (b == 0x37) ? 1 : -1;
+ _regs.eflags |= EFLG_CF | EFLG_AF;
+ }
+ ((uint8_t *)&_regs.eax)[0] &= 0x0f;
+ break;
+
+ case 0x40 ... 0x4f: /* inc/dec reg */
+ dst.type = OP_REG;
+ dst.reg = decode_register(b & 7, &_regs, 0);
+ dst.bytes = op_bytes;
+ dst.val = *dst.reg;
+ if ( b & 8 )
+ emulate_1op("dec", dst, _regs.eflags);
+ else
+ emulate_1op("inc", dst, _regs.eflags);
+ break;
+
+ case 0x50 ... 0x57: /* push reg */
+ src.val = *(unsigned long *)decode_register(
+ (b & 7) | ((rex_prefix & 1) << 3), &_regs, 0);
+ goto push;
+
+ case 0x58 ... 0x5f: /* pop reg */
+ dst.type = OP_REG;
+ dst.reg = decode_register(
+ (b & 7) | ((rex_prefix & 1) << 3), &_regs, 0);
+ dst.bytes = op_bytes;
+ if ( mode_64bit() && (dst.bytes == 4) )
+ dst.bytes = 8;
+ if ( (rc = ops->read(x86_seg_ss, sp_post_inc(dst.bytes),
+ &dst.val, dst.bytes, ctxt)) != 0 )
+ goto done;
+ break;
+
+ case 0x60: /* pusha */ {
+ int i;
+ unsigned long regs[] = {
+ _regs.eax, _regs.ecx, _regs.edx, _regs.ebx,
+ _regs.esp, _regs.ebp, _regs.esi, _regs.edi };
+ generate_exception_if(mode_64bit(), EXC_UD, -1);
+ for ( i = 0; i < 8; i++ )
+ if ( (rc = ops->write(x86_seg_ss, sp_pre_dec(op_bytes),
+ regs[i], op_bytes, ctxt)) != 0 )
+ goto done;
+ break;
+ }
+
+ case 0x61: /* popa */ {
+ int i;
+ unsigned long dummy_esp, *regs[] = {
+ (unsigned long *)&_regs.edi, (unsigned long *)&_regs.esi,
+ (unsigned long *)&_regs.ebp, (unsigned long *)&dummy_esp,
+ (unsigned long *)&_regs.ebx, (unsigned long *)&_regs.edx,
+ (unsigned long *)&_regs.ecx, (unsigned long *)&_regs.eax };
+ generate_exception_if(mode_64bit(), EXC_UD, -1);
+ for ( i = 0; i < 8; i++ )
+ {
+ if ( (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
+ &dst.val, op_bytes, ctxt)) != 0 )
+ goto done;
+ switch ( op_bytes )
+ {
+ case 1: *(uint8_t *)regs[i] = (uint8_t)dst.val; break;
+ case 2: *(uint16_t *)regs[i] = (uint16_t)dst.val; break;
+ case 4: *regs[i] = (uint32_t)dst.val; break; /* 64b: zero-ext */
+ case 8: *regs[i] = dst.val; break;
+ }
+ }
+ break;
+ }
+
+ case 0x68: /* push imm{16,32,64} */
+ src.val = ((op_bytes == 2)
+ ? (int32_t)insn_fetch_type(int16_t)
+ : insn_fetch_type(int32_t));
+ goto push;
+
+ case 0x6a: /* push imm8 */
+ src.val = insn_fetch_type(int8_t);
+ push:
+ d |= Mov; /* force writeback */
+ dst.type = OP_MEM;
+ dst.bytes = op_bytes;
+ if ( mode_64bit() && (dst.bytes == 4) )
+ dst.bytes = 8;
+ dst.val = src.val;
+ dst.mem.seg = x86_seg_ss;
+ dst.mem.off = sp_pre_dec(dst.bytes);
+ break;
+
+ case 0x6c ... 0x6d: /* ins %dx,%es:%edi */ {
+ unsigned long nr_reps = get_rep_prefix();
+ unsigned int port = (uint16_t)_regs.edx;
+ dst.bytes = !(b & 1) ? 1 : (op_bytes == 8) ? 4 : op_bytes;
+ dst.mem.seg = x86_seg_es;
+ dst.mem.off = truncate_ea(_regs.edi);
+ if ( (rc = ioport_access_check(port, dst.bytes, ctxt, ops)) != 0 )
+ goto done;
+ if ( (nr_reps > 1) && (ops->rep_ins != NULL) &&
+ ((rc = ops->rep_ins(port, dst.mem.seg, dst.mem.off, dst.bytes,
+ &nr_reps, ctxt)) != X86EMUL_UNHANDLEABLE) )
+ {
+ if ( rc != 0 )
+ goto done;
+ }
+ else
+ {
+ fail_if(ops->read_io == NULL);
+ if ( (rc = ops->read_io(port, dst.bytes, &dst.val, ctxt)) != 0 )
+ goto done;
+ dst.type = OP_MEM;
+ nr_reps = 1;
+ }
+ register_address_increment(
+ _regs.edi,
+ nr_reps * ((_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes));
+ put_rep_prefix(nr_reps);
+ break;
+ }
+
+ case 0x6e ... 0x6f: /* outs %esi,%dx */ {
+ unsigned long nr_reps = get_rep_prefix();
+ unsigned int port = (uint16_t)_regs.edx;
+ dst.bytes = !(b & 1) ? 1 : (op_bytes == 8) ? 4 : op_bytes;
+ if ( (rc = ioport_access_check(port, dst.bytes, ctxt, ops)) != 0 )
+ goto done;
+ if ( (nr_reps > 1) && (ops->rep_outs != NULL) &&
+ ((rc = ops->rep_outs(ea.mem.seg, truncate_ea(_regs.esi),
+ port, dst.bytes,
+ &nr_reps, ctxt)) != X86EMUL_UNHANDLEABLE) )
+ {
+ if ( rc != 0 )
+ goto done;
+ }
+ else
+ {
+ if ( (rc = ops->read(ea.mem.seg, truncate_ea(_regs.esi),
+ &dst.val, dst.bytes, ctxt)) != 0 )
+ goto done;
+ fail_if(ops->write_io == NULL);
+ if ( (rc = ops->write_io(port, dst.bytes, dst.val, ctxt)) != 0 )
+ goto done;
+ nr_reps = 1;
+ }
+ register_address_increment(
+ _regs.esi,
+ nr_reps * ((_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes));
+ put_rep_prefix(nr_reps);
+ break;
+ }
+
+ case 0x70 ... 0x7f: /* jcc (short) */ {
+ int rel = insn_fetch_type(int8_t);
+ if ( test_cc(b, _regs.eflags) )
+ jmp_rel(rel);
+ break;
+ }
+
+ case 0x90: /* nop / xchg %%r8,%%rax */
+ if ( !(rex_prefix & 1) )
+ break; /* nop */
+
+ case 0x91 ... 0x97: /* xchg reg,%%rax */
+ src.type = dst.type = OP_REG;
+ src.bytes = dst.bytes = op_bytes;
+ src.reg = (unsigned long *)&_regs.eax;
+ src.val = *src.reg;
+ dst.reg = decode_register(
+ (b & 7) | ((rex_prefix & 1) << 3), &_regs, 0);
+ dst.val = *dst.reg;
+ goto xchg;
+
+ case 0x98: /* cbw/cwde/cdqe */
+ switch ( op_bytes )
+ {
+ case 2: *(int16_t *)&_regs.eax = (int8_t)_regs.eax; break; /* cbw */
+ case 4: _regs.eax = (uint32_t)(int16_t)_regs.eax; break; /* cwde */
+ case 8: _regs.eax = (int32_t)_regs.eax; break; /* cdqe */
+ }
+ break;
+
+ case 0x99: /* cwd/cdq/cqo */
+ switch ( op_bytes )
+ {
+ case 2:
+ *(int16_t *)&_regs.edx = ((int16_t)_regs.eax < 0) ? -1 : 0;
+ break;
+ case 4:
+ _regs.edx = (uint32_t)(((int32_t)_regs.eax < 0) ? -1 : 0);
+ break;
+ case 8:
+ _regs.edx = (_regs.eax < 0) ? -1 : 0;
+ break;
+ }
+ break;
+
+ case 0x9a: /* call (far, absolute) */ {
+ struct segment_register reg;
+ uint16_t sel;
+ uint32_t eip;
+
+ fail_if(ops->read_segment == NULL);
+ generate_exception_if(mode_64bit(), EXC_UD, -1);
+
+ eip = insn_fetch_bytes(op_bytes);
+ sel = insn_fetch_type(uint16_t);
+
+ if ( (rc = ops->read_segment(x86_seg_cs, ®, ctxt)) ||
+ (rc = ops->write(x86_seg_ss, sp_pre_dec(op_bytes),
+ reg.sel, op_bytes, ctxt)) ||
+ (rc = ops->write(x86_seg_ss, sp_pre_dec(op_bytes),
+ _regs.eip, op_bytes, ctxt)) )
+ goto done;
+
+ if ( (rc = load_seg(x86_seg_cs, sel, ctxt, ops)) != 0 )
+ goto done;
+ _regs.eip = eip;
+ break;
+ }
+
+ case 0x9b: /* wait/fwait */
+ fail_if(ops->load_fpu_ctxt == NULL);
+ ops->load_fpu_ctxt(ctxt);
+ __emulate_fpu_insn("fwait");
+ break;
+
+ case 0x9c: /* pushf */
+ src.val = _regs.eflags;
+ goto push;
+
+ case 0x9d: /* popf */ {
+ uint32_t mask = EFLG_VIP | EFLG_VIF | EFLG_VM;
+ if ( !mode_ring0() )
+ mask |= EFLG_IOPL;
+ if ( !mode_iopl() )
+ mask |= EFLG_IF;
+ /* 64-bit mode: POP defaults to a 64-bit operand. */
+ if ( mode_64bit() && (op_bytes == 4) )
+ op_bytes = 8;
+ if ( (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
+ &dst.val, op_bytes, ctxt)) != 0 )
+ goto done;
+ if ( op_bytes == 2 )
+ dst.val = (uint16_t)dst.val | (_regs.eflags & 0xffff0000u);
+ dst.val &= 0x257fd5;
+ _regs.eflags &= mask;
+ _regs.eflags |= (uint32_t)(dst.val & ~mask) | 0x02;
+ break;
+ }
+
+ case 0x9e: /* sahf */
+ *(uint8_t *)&_regs.eflags = (((uint8_t *)&_regs.eax)[1] & 0xd7) | 0x02;
+ break;
+
+ case 0x9f: /* lahf */
+ ((uint8_t *)&_regs.eax)[1] = (_regs.eflags & 0xd7) | 0x02;
+ break;
+
+ case 0xa0 ... 0xa1: /* mov mem.offs,{%al,%ax,%eax,%rax} */
+ /* Source EA is not encoded via ModRM. */
+ dst.type = OP_REG;
+ dst.reg = (unsigned long *)&_regs.eax;
+ dst.bytes = (d & ByteOp) ? 1 : op_bytes;
+ if ( (rc = ops->read(ea.mem.seg, insn_fetch_bytes(ad_bytes),
+ &dst.val, dst.bytes, ctxt)) != 0 )
+ goto done;
+ break;
+
+ case 0xa2 ... 0xa3: /* mov {%al,%ax,%eax,%rax},mem.offs */
+ /* Destination EA is not encoded via ModRM. */
+ dst.type = OP_MEM;
+ dst.mem.seg = ea.mem.seg;
+ dst.mem.off = insn_fetch_bytes(ad_bytes);
+ dst.bytes = (d & ByteOp) ? 1 : op_bytes;
+ dst.val = (unsigned long)_regs.eax;
+ break;
+
+ case 0xa4 ... 0xa5: /* movs */ {
+ unsigned long nr_reps = get_rep_prefix();
+ dst.bytes = (d & ByteOp) ? 1 : op_bytes;
+ dst.mem.seg = x86_seg_es;
+ dst.mem.off = truncate_ea(_regs.edi);
+ if ( (nr_reps > 1) && (ops->rep_movs != NULL) &&
+ ((rc = ops->rep_movs(ea.mem.seg, truncate_ea(_regs.esi),
+ dst.mem.seg, dst.mem.off, dst.bytes,
+ &nr_reps, ctxt)) != X86EMUL_UNHANDLEABLE) )
+ {
+ if ( rc != 0 )
+ goto done;
+ }
+ else
+ {
+ if ( (rc = ops->read(ea.mem.seg, truncate_ea(_regs.esi),
+ &dst.val, dst.bytes, ctxt)) != 0 )
+ goto done;
+ dst.type = OP_MEM;
+ nr_reps = 1;
+ }
+ register_address_increment(
+ _regs.esi,
+ nr_reps * ((_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes));
+ register_address_increment(
+ _regs.edi,
+ nr_reps * ((_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes));
+ put_rep_prefix(nr_reps);
+ break;
+ }
+
+ case 0xa6 ... 0xa7: /* cmps */ {
+ unsigned long next_eip = _regs.eip;
+ get_rep_prefix();
+ src.bytes = dst.bytes = (d & ByteOp) ? 1 : op_bytes;
+ if ( (rc = ops->read(ea.mem.seg, truncate_ea(_regs.esi),
+ &dst.val, dst.bytes, ctxt)) ||
+ (rc = ops->read(x86_seg_es, truncate_ea(_regs.edi),
+ &src.val, src.bytes, ctxt)) )
+ goto done;
+ register_address_increment(
+ _regs.esi, (_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes);
+ register_address_increment(
+ _regs.edi, (_regs.eflags & EFLG_DF) ? -src.bytes : src.bytes);
+ put_rep_prefix(1);
+ /* cmp: dst - src ==> src=*%%edi,dst=*%%esi ==> *%%esi - *%%edi */
+ emulate_2op_SrcV("cmp", src, dst, _regs.eflags);
+ if ( ((rep_prefix == REPE_PREFIX) && !(_regs.eflags & EFLG_ZF)) ||
+ ((rep_prefix == REPNE_PREFIX) && (_regs.eflags & EFLG_ZF)) )
+ _regs.eip = next_eip;
+ break;
+ }
+
+ case 0xaa ... 0xab: /* stos */ {
+ /* unsigned long max_reps = */get_rep_prefix();
+ dst.type = OP_MEM;
+ dst.bytes = (d & ByteOp) ? 1 : op_bytes;
+ dst.mem.seg = x86_seg_es;
+ dst.mem.off = truncate_ea(_regs.edi);
+ dst.val = _regs.eax;
+ register_address_increment(
+ _regs.edi, (_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes);
+ put_rep_prefix(1);
+ break;
+ }
+
+ case 0xac ... 0xad: /* lods */ {
+ /* unsigned long max_reps = */get_rep_prefix();
+ dst.type = OP_REG;
+ dst.bytes = (d & ByteOp) ? 1 : op_bytes;
+ dst.reg = (unsigned long *)&_regs.eax;
+ if ( (rc = ops->read(ea.mem.seg, truncate_ea(_regs.esi),
+ &dst.val, dst.bytes, ctxt)) != 0 )
+ goto done;
+ register_address_increment(
+ _regs.esi, (_regs.eflags & EFLG_DF) ? -dst.bytes : dst.bytes);
+ put_rep_prefix(1);
+ break;
+ }
+
+ case 0xae ... 0xaf: /* scas */ {
+ unsigned long next_eip = _regs.eip;
+ get_rep_prefix();
+ src.bytes = dst.bytes = (d & ByteOp) ? 1 : op_bytes;
+ dst.val = _regs.eax;
+ if ( (rc = ops->read(x86_seg_es, truncate_ea(_regs.edi),
+ &src.val, src.bytes, ctxt)) != 0 )
+ goto done;
+ register_address_increment(
+ _regs.edi, (_regs.eflags & EFLG_DF) ? -src.bytes : src.bytes);
+ put_rep_prefix(1);
+ /* cmp: dst - src ==> src=*%%edi,dst=%%eax ==> %%eax - *%%edi */
+ emulate_2op_SrcV("cmp", src, dst, _regs.eflags);
+ if ( ((rep_prefix == REPE_PREFIX) && !(_regs.eflags & EFLG_ZF)) ||
+ ((rep_prefix == REPNE_PREFIX) && (_regs.eflags & EFLG_ZF)) )
+ _regs.eip = next_eip;
+ break;
+ }
+
+ case 0xc2: /* ret imm16 (near) */
+ case 0xc3: /* ret (near) */ {
+ int offset = (b == 0xc2) ? insn_fetch_type(uint16_t) : 0;
+ op_bytes = mode_64bit() ? 8 : op_bytes;
+ if ( (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes + offset),
+ &dst.val, op_bytes, ctxt)) != 0 )
+ goto done;
+ _regs.eip = dst.val;
+ break;
+ }
+
+ case 0xc8: /* enter imm16,imm8 */ {
+ uint16_t size = insn_fetch_type(uint16_t);
+ uint8_t depth = insn_fetch_type(uint8_t) & 31;
+ int i;
+
+ dst.type = OP_REG;
+ dst.bytes = (mode_64bit() && (op_bytes == 4)) ? 8 : op_bytes;
+ dst.reg = (unsigned long *)&_regs.ebp;
+ if ( (rc = ops->write(x86_seg_ss, sp_pre_dec(dst.bytes),
+ _regs.ebp, dst.bytes, ctxt)) )
+ goto done;
+ dst.val = _regs.esp;
+
+ if ( depth > 0 )
+ {
+ for ( i = 1; i < depth; i++ )
+ {
+ unsigned long ebp, temp_data;
+ ebp = truncate_word(_regs.ebp - i*dst.bytes, ctxt->sp_size/8);
+ if ( (rc = ops->read(x86_seg_ss, ebp,
+ &temp_data, dst.bytes, ctxt)) ||
+ (rc = ops->write(x86_seg_ss, sp_pre_dec(dst.bytes),
+ temp_data, dst.bytes, ctxt)) )
+ goto done;
+ }
+ if ( (rc = ops->write(x86_seg_ss, sp_pre_dec(dst.bytes),
+ dst.val, dst.bytes, ctxt)) )
+ goto done;
+ }
+
+ sp_pre_dec(size);
+ break;
+ }
+
+ case 0xc9: /* leave */
+ /* First writeback, to %%esp. */
+ dst.type = OP_REG;
+ dst.bytes = (mode_64bit() && (op_bytes == 4)) ? 8 : op_bytes;
+ dst.reg = (unsigned long *)&_regs.esp;
+ dst.val = _regs.ebp;
+
+ /* Flush first writeback, since there is a second. */
+ switch ( dst.bytes )
+ {
+ case 1: *(uint8_t *)dst.reg = (uint8_t)dst.val; break;
+ case 2: *(uint16_t *)dst.reg = (uint16_t)dst.val; break;
+ case 4: *dst.reg = (uint32_t)dst.val; break; /* 64b: zero-ext */
+ case 8: *dst.reg = dst.val; break;
+ }
+
+ /* Second writeback, to %%ebp. */
+ dst.reg = (unsigned long *)&_regs.ebp;
+ if ( (rc = ops->read(x86_seg_ss, sp_post_inc(dst.bytes),
+ &dst.val, dst.bytes, ctxt)) )
+ goto done;
+ break;
+
+ case 0xca: /* ret imm16 (far) */
+ case 0xcb: /* ret (far) */ {
+ int offset = (b == 0xca) ? insn_fetch_type(uint16_t) : 0;
+ op_bytes = mode_64bit() ? 8 : op_bytes;
+ if ( (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
+ &dst.val, op_bytes, ctxt)) ||
+ (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes + offset),
+ &src.val, op_bytes, ctxt)) ||
+ (rc = load_seg(x86_seg_cs, (uint16_t)src.val, ctxt, ops)) )
+ goto done;
+ _regs.eip = dst.val;
+ break;
+ }
+
+ case 0xcc: /* int3 */
+ src.val = EXC_BP;
+ goto swint;
+
+ case 0xcd: /* int imm8 */
+ src.val = insn_fetch_type(uint8_t);
+ swint:
+ fail_if(ops->inject_sw_interrupt == NULL);
+ rc = ops->inject_sw_interrupt(src.val, _regs.eip - ctxt->regs->eip,
+ ctxt) ? : X86EMUL_EXCEPTION;
+ goto done;
+
+ case 0xce: /* into */
+ generate_exception_if(mode_64bit(), EXC_UD, -1);
+ if ( !(_regs.eflags & EFLG_OF) )
+ break;
+ src.val = EXC_OF;
+ goto swint;
+
+ case 0xcf: /* iret */ {
+ unsigned long cs, eip, eflags;
+ uint32_t mask = EFLG_VIP | EFLG_VIF | EFLG_VM;
+ if ( !mode_ring0() )
+ mask |= EFLG_IOPL;
+ if ( !mode_iopl() )
+ mask |= EFLG_IF;
+ fail_if(!in_realmode(ctxt, ops));
+ if ( (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
+ &eip, op_bytes, ctxt)) ||
+ (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
+ &cs, op_bytes, ctxt)) ||
+ (rc = ops->read(x86_seg_ss, sp_post_inc(op_bytes),
+ &eflags, op_bytes, ctxt)) )
+ goto done;
+ if ( op_bytes == 2 )
+ eflags = (uint16_t)eflags | (_regs.eflags & 0xffff0000u);
+ eflags &= 0x257fd5;
+ _regs.eflags &= mask;
+ _regs.eflags |= (uint32_t)(eflags & ~mask) | 0x02;
+ _regs.eip = eip;
+ if ( (rc = load_seg(x86_seg_cs, (uint16_t)cs, ctxt, ops)) != 0 )
+ goto done;
+ break;
+ }
+
+ case 0xd4: /* aam */ {
+ unsigned int base = insn_fetch_type(uint8_t);
+ uint8_t al = _regs.eax;
+ generate_exception_if(mode_64bit(), EXC_UD, -1);
+ generate_exception_if(base == 0, EXC_DE, -1);
+ *(uint16_t *)&_regs.eax = ((al / base) << 8) | (al % base);
+ _regs.eflags &= ~(EFLG_SF|EFLG_ZF|EFLG_PF);
+ _regs.eflags |= ((uint8_t)_regs.eax == 0) ? EFLG_ZF : 0;
+ _regs.eflags |= (( int8_t)_regs.eax < 0) ? EFLG_SF : 0;
+ _regs.eflags |= even_parity(_regs.eax) ? EFLG_PF : 0;
+ break;
+ }
+
+ case 0xd5: /* aad */ {
+ unsigned int base = insn_fetch_type(uint8_t);
+ uint16_t ax = _regs.eax;
+ generate_exception_if(mode_64bit(), EXC_UD, -1);
+ *(uint16_t *)&_regs.eax = (uint8_t)(ax + ((ax >> 8) * base));
+ _regs.eflags &= ~(EFLG_SF|EFLG_ZF|EFLG_PF);
+ _regs.eflags |= ((uint8_t)_regs.eax == 0) ? EFLG_ZF : 0;
+ _regs.eflags |= (( int8_t)_regs.eax < 0) ? EFLG_SF : 0;
+ _regs.eflags |= even_parity(_regs.eax) ? EFLG_PF : 0;
+ break;
+ }
+
+ case 0xd6: /* salc */
+ generate_exception_if(mode_64bit(), EXC_UD, -1);
+ *(uint8_t *)&_regs.eax = (_regs.eflags & EFLG_CF) ? 0xff : 0x00;
+ break;
+
+ case 0xd7: /* xlat */ {
+ unsigned long al = (uint8_t)_regs.eax;
+ if ( (rc = ops->read(ea.mem.seg, truncate_ea(_regs.ebx + al),
+ &al, 1, ctxt)) != 0 )
+ goto done;
+ *(uint8_t *)&_regs.eax = al;
+ break;
+ }
+
+ case 0xd9: /* FPU 0xd9 */
+ fail_if(ops->load_fpu_ctxt == NULL);
+ ops->load_fpu_ctxt(ctxt);
+ switch ( modrm )
+ {
+ case 0xc0: __emulate_fpu_insn(".byte 0xd9,0xc0"); break;
+ case 0xc1: __emulate_fpu_insn(".byte 0xd9,0xc1"); break;
+ case 0xc2: __emulate_fpu_insn(".byte 0xd9,0xc2"); break;
+ case 0xc3: __emulate_fpu_insn(".byte 0xd9,0xc3"); break;
+ case 0xc4: __emulate_fpu_insn(".byte 0xd9,0xc4"); break;
+ case 0xc5: __emulate_fpu_insn(".byte 0xd9,0xc5"); break;
+ case 0xc6: __emulate_fpu_insn(".byte 0xd9,0xc6"); break;
+ case 0xc7: __emulate_fpu_insn(".byte 0xd9,0xc7"); break;
+ case 0xe0: __emulate_fpu_insn(".byte 0xd9,0xe0"); break;
+ case 0xe8: __emulate_fpu_insn(".byte 0xd9,0xe8"); break;
+ case 0xee: __emulate_fpu_insn(".byte 0xd9,0xee"); break;
+ default:
+ fail_if((modrm_reg & 7) != 7);
+ fail_if(modrm >= 0xc0);
+ /* fnstcw m2byte */
+ ea.bytes = 2;
+ dst = ea;
+ asm volatile ( "fnstcw %0" : "=m" (dst.val) );
+ }
+ break;
+
+ case 0xdb: /* FPU 0xdb */
+ fail_if(ops->load_fpu_ctxt == NULL);
+ ops->load_fpu_ctxt(ctxt);
+ fail_if(modrm != 0xe3);
+ /* fninit */
+ asm volatile ( "fninit" );
+ break;
+
+ case 0xdd: /* FPU 0xdd */
+ fail_if(ops->load_fpu_ctxt == NULL);
+ ops->load_fpu_ctxt(ctxt);
+ fail_if((modrm_reg & 7) != 7);
+ fail_if(modrm >= 0xc0);
+ /* fnstsw m2byte */
+ ea.bytes = 2;
+ dst = ea;
+ asm volatile ( "fnstsw %0" : "=m" (dst.val) );
+ break;
+
+ case 0xde: /* FPU 0xde */
+ fail_if(ops->load_fpu_ctxt == NULL);
+ ops->load_fpu_ctxt(ctxt);
+ switch ( modrm )
+ {
+ case 0xd9: __emulate_fpu_insn(".byte 0xde,0xd9"); break;
+ case 0xf8: __emulate_fpu_insn(".byte 0xde,0xf8"); break;
+ case 0xf9: __emulate_fpu_insn(".byte 0xde,0xf9"); break;
+ case 0xfa: __emulate_fpu_insn(".byte 0xde,0xfa"); break;
+ case 0xfb: __emulate_fpu_insn(".byte 0xde,0xfb"); break;
+ case 0xfc: __emulate_fpu_insn(".byte 0xde,0xfc"); break;
+ case 0xfd: __emulate_fpu_insn(".byte 0xde,0xfd"); break;
+ case 0xfe: __emulate_fpu_insn(".byte 0xde,0xfe"); break;
+ case 0xff: __emulate_fpu_insn(".byte 0xde,0xff"); break;
+ default: goto cannot_emulate;
+ }
+ break;
+
+ case 0xdf: /* FPU 0xdf */
+ fail_if(ops->load_fpu_ctxt == NULL);
+ ops->load_fpu_ctxt(ctxt);
+ fail_if(modrm != 0xe0);
+ /* fnstsw %ax */
+ dst.bytes = 2;
+ dst.type = OP_REG;
+ dst.reg = (unsigned long *)&_regs.eax;
+ asm volatile ( "fnstsw %0" : "=m" (dst.val) );
+ break;
+
+ case 0xe0 ... 0xe2: /* loop{,z,nz} */ {
+ int rel = insn_fetch_type(int8_t);
+ int do_jmp = !(_regs.eflags & EFLG_ZF); /* loopnz */
+ if ( b == 0xe1 )
+ do_jmp = !do_jmp; /* loopz */
+ else if ( b == 0xe2 )
+ do_jmp = 1; /* loop */
+ switch ( ad_bytes )
+ {
+ case 2:
+ do_jmp &= --(*(uint16_t *)&_regs.ecx) != 0;
+ break;
+ case 4:
+ do_jmp &= --(*(uint32_t *)&_regs.ecx) != 0;
+ _regs.ecx = (uint32_t)_regs.ecx; /* zero extend in x86/64 mode */
+ break;
+ default: /* case 8: */
+ do_jmp &= --_regs.ecx != 0;
+ break;
+ }
+ if ( do_jmp )
+ jmp_rel(rel);
+ break;
+ }
+
+ case 0xe3: /* jcxz/jecxz (short) */ {
+ int rel = insn_fetch_type(int8_t);
+ if ( (ad_bytes == 2) ? !(uint16_t)_regs.ecx :
+ (ad_bytes == 4) ? !(uint32_t)_regs.ecx : !_regs.ecx )
+ jmp_rel(rel);
+ break;
+ }
+
+ case 0xe4: /* in imm8,%al */
+ case 0xe5: /* in imm8,%eax */
+ case 0xe6: /* out %al,imm8 */
+ case 0xe7: /* out %eax,imm8 */
+ case 0xec: /* in %dx,%al */
+ case 0xed: /* in %dx,%eax */
+ case 0xee: /* out %al,%dx */
+ case 0xef: /* out %eax,%dx */ {
+ unsigned int port = ((b < 0xe8)
+ ? insn_fetch_type(uint8_t)
+ : (uint16_t)_regs.edx);
+ op_bytes = !(b & 1) ? 1 : (op_bytes == 8) ? 4 : op_bytes;
+ if ( (rc = ioport_access_check(port, op_bytes, ctxt, ops)) != 0 )
+ goto done;
+ if ( b & 2 )
+ {
+ /* out */
+ fail_if(ops->write_io == NULL);
+ rc = ops->write_io(port, op_bytes, _regs.eax, ctxt);
+
+ }
+ else
+ {
+ /* in */
+ dst.type = OP_REG;
+ dst.bytes = op_bytes;
+ dst.reg = (unsigned long *)&_regs.eax;
+ fail_if(ops->read_io == NULL);
+ rc = ops->read_io(port, dst.bytes, &dst.val, ctxt);
+ }
+ if ( rc != 0 )
+ goto done;
+ break;
+ }
+
+ case 0xe8: /* call (near) */ {
+ int rel = (((op_bytes == 2) && !mode_64bit())
+ ? (int32_t)insn_fetch_type(int16_t)
+ : insn_fetch_type(int32_t));
+ op_bytes = mode_64bit() ? 8 : op_bytes;
+ src.val = _regs.eip;
+ jmp_rel(rel);
+ goto push;
+ }
+
+ case 0xe9: /* jmp (near) */ {
+ int rel = (((op_bytes == 2) && !mode_64bit())
+ ? (int32_t)insn_fetch_type(int16_t)
+ : insn_fetch_type(int32_t));
+ jmp_rel(rel);
+ break;
+ }
+
+ case 0xea: /* jmp (far, absolute) */ {
+ uint16_t sel;
+ uint32_t eip;
+ generate_exception_if(mode_64bit(), EXC_UD, -1);
+ eip = insn_fetch_bytes(op_bytes);
+ sel = insn_fetch_type(uint16_t);
+ if ( (rc = load_seg(x86_seg_cs, sel, ctxt, ops)) != 0 )
+ goto done;
+ _regs.eip = eip;
+ break;
+ }
+
+ case 0xeb: /* jmp (short) */ {
+ int rel = insn_fetch_type(int8_t);
+ jmp_rel(rel);
+ break;
+ }
+
+ case 0xf1: /* int1 (icebp) */
+ src.val = EXC_DB;
+ goto swint;
+
+ case 0xf4: /* hlt */
+ ctxt->retire.flags.hlt = 1;
+ break;
+
+ case 0xf5: /* cmc */
+ _regs.eflags ^= EFLG_CF;
+ break;
+
+ case 0xf8: /* clc */
+ _regs.eflags &= ~EFLG_CF;
+ break;
+
+ case 0xf9: /* stc */
+ _regs.eflags |= EFLG_CF;
+ break;
+
+ case 0xfa: /* cli */
+ generate_exception_if(!mode_iopl(), EXC_GP, 0);
+ _regs.eflags &= ~EFLG_IF;
+ break;
+
+ case 0xfb: /* sti */
+ generate_exception_if(!mode_iopl(), EXC_GP, 0);
+ if ( !(_regs.eflags & EFLG_IF) )
+ {
+ _regs.eflags |= EFLG_IF;
+ ctxt->retire.flags.sti = 1;
+ }
+ break;
+
+ case 0xfc: /* cld */
+ _regs.eflags &= ~EFLG_DF;
+ break;
+
+ case 0xfd: /* std */
+ _regs.eflags |= EFLG_DF;
+ break;
+ }
+ goto writeback;
+
+ twobyte_insn:
+ switch ( b )
+ {
+ case 0x40 ... 0x4f: /* cmovcc */
+ dst.val = src.val;
+ if ( !test_cc(b, _regs.eflags) )
+ dst.type = OP_NONE;
+ break;
+
+ case 0x90 ... 0x9f: /* setcc */
+ dst.val = test_cc(b, _regs.eflags);
+ break;
+
+ case 0xb0 ... 0xb1: /* cmpxchg */
+ /* Save real source value, then compare EAX against destination. */
+ src.orig_val = src.val;
+ src.val = _regs.eax;
+ emulate_2op_SrcV("cmp", src, dst, _regs.eflags);
+ if ( _regs.eflags & EFLG_ZF )
+ {
+ /* Success: write back to memory. */
+ dst.val = src.orig_val;
+ }
+ else
+ {
+ /* Failure: write the value we saw to EAX. */
+ dst.type = OP_REG;
+ dst.reg = (unsigned long *)&_regs.eax;
+ }
+ break;
+
+ case 0xa3: bt: /* bt */
+ emulate_2op_SrcV_nobyte("bt", src, dst, _regs.eflags);
+ break;
+
+ case 0xa4: /* shld imm8,r,r/m */
+ case 0xa5: /* shld %%cl,r,r/m */
+ case 0xac: /* shrd imm8,r,r/m */
+ case 0xad: /* shrd %%cl,r,r/m */ {
+ uint8_t shift, width = dst.bytes << 3;
+ shift = (b & 1) ? (uint8_t)_regs.ecx : insn_fetch_type(uint8_t);
+ if ( (shift &= width - 1) == 0 )
+ break;
+ dst.orig_val = truncate_word(dst.val, dst.bytes);
+ dst.val = ((shift == width) ? src.val :
+ (b & 8) ?
+ /* shrd */
+ ((dst.orig_val >> shift) |
+ truncate_word(src.val << (width - shift), dst.bytes)) :
+ /* shld */
+ ((dst.orig_val << shift) |
+ ((src.val >> (width - shift)) & ((1ull << shift) - 1))));
+ dst.val = truncate_word(dst.val, dst.bytes);
+ _regs.eflags &= ~(EFLG_OF|EFLG_SF|EFLG_ZF|EFLG_PF|EFLG_CF);
+ if ( (dst.val >> ((b & 8) ? (shift - 1) : (width - shift))) & 1 )
+ _regs.eflags |= EFLG_CF;
+ if ( ((dst.val ^ dst.orig_val) >> (width - 1)) & 1 )
+ _regs.eflags |= EFLG_OF;
+ _regs.eflags |= ((dst.val >> (width - 1)) & 1) ? EFLG_SF : 0;
+ _regs.eflags |= (dst.val == 0) ? EFLG_ZF : 0;
+ _regs.eflags |= even_parity(dst.val) ? EFLG_PF : 0;
+ break;
+ }
+
+ case 0xb3: btr: /* btr */
+ emulate_2op_SrcV_nobyte("btr", src, dst, _regs.eflags);
+ break;
+
+ case 0xab: bts: /* bts */
+ emulate_2op_SrcV_nobyte("bts", src, dst, _regs.eflags);
+ break;
+
+ case 0xaf: /* imul */
+ _regs.eflags &= ~(EFLG_OF|EFLG_CF);
+ switch ( dst.bytes )
+ {
+ case 2:
+ dst.val = ((uint32_t)(int16_t)src.val *
+ (uint32_t)(int16_t)dst.val);
+ if ( (int16_t)dst.val != (uint32_t)dst.val )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ break;
+#ifdef __x86_64__
+ case 4:
+ dst.val = ((uint64_t)(int32_t)src.val *
+ (uint64_t)(int32_t)dst.val);
+ if ( (int32_t)dst.val != dst.val )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ break;
+#endif
+ default: {
+ unsigned long m[2] = { src.val, dst.val };
+ if ( imul_dbl(m) )
+ _regs.eflags |= EFLG_OF|EFLG_CF;
+ dst.val = m[0];
+ break;
+ }
+ }
+ break;
+
+ case 0xb2: /* lss */
+ dst.val = x86_seg_ss;
+ goto les;
+
+ case 0xb4: /* lfs */
+ dst.val = x86_seg_fs;
+ goto les;
+
+ case 0xb5: /* lgs */
+ dst.val = x86_seg_gs;
+ goto les;
+
+ case 0xb6: /* movzx rm8,r{16,32,64} */
+ /* Recompute DstReg as we may have decoded AH/BH/CH/DH. */
+ dst.reg = decode_register(modrm_reg, &_regs, 0);
+ dst.bytes = op_bytes;
+ dst.val = (uint8_t)src.val;
+ break;
+
+ case 0xbc: /* bsf */ {
+ int zf;
+ asm ( "bsf %2,%0; setz %b1"
+ : "=r" (dst.val), "=q" (zf)
+ : "r" (src.val), "1" (0) );
+ _regs.eflags &= ~EFLG_ZF;
+ _regs.eflags |= zf ? EFLG_ZF : 0;
+ break;
+ }
+
+ case 0xbd: /* bsr */ {
+ int zf;
+ asm ( "bsr %2,%0; setz %b1"
+ : "=r" (dst.val), "=q" (zf)
+ : "r" (src.val), "1" (0) );
+ _regs.eflags &= ~EFLG_ZF;
+ _regs.eflags |= zf ? EFLG_ZF : 0;
+ break;
+ }
+
+ case 0xb7: /* movzx rm16,r{16,32,64} */
+ dst.val = (uint16_t)src.val;
+ break;
+
+ case 0xbb: btc: /* btc */
+ emulate_2op_SrcV_nobyte("btc", src, dst, _regs.eflags);
+ break;
+
+ case 0xba: /* Grp8 */
+ switch ( modrm_reg & 7 )
+ {
+ case 4: goto bt;
+ case 5: goto bts;
+ case 6: goto btr;
+ case 7: goto btc;
+ default: generate_exception_if(1, EXC_UD, -1);
+ }
+ break;
+
+ case 0xbe: /* movsx rm8,r{16,32,64} */
+ /* Recompute DstReg as we may have decoded AH/BH/CH/DH. */
+ dst.reg = decode_register(modrm_reg, &_regs, 0);
+ dst.bytes = op_bytes;
+ dst.val = (int8_t)src.val;
+ break;
+
+ case 0xbf: /* movsx rm16,r{16,32,64} */
+ dst.val = (int16_t)src.val;
+ break;
+
+ case 0xc0 ... 0xc1: /* xadd */
+ /* Write back the register source. */
+ switch ( dst.bytes )
+ {
+ case 1: *(uint8_t *)src.reg = (uint8_t)dst.val; break;
+ case 2: *(uint16_t *)src.reg = (uint16_t)dst.val; break;
+ case 4: *src.reg = (uint32_t)dst.val; break; /* 64b reg: zero-extend */
+ case 8: *src.reg = dst.val; break;
+ }
+ goto add;
+ }
+ goto writeback;
+
+ twobyte_special_insn:
+ switch ( b )
+ {
+ case 0x01: /* Grp7 */ {
+ struct segment_register reg;
+ unsigned long base, limit, cr0, cr0w;
+
+ if ( modrm == 0xdf ) /* invlpga */
+ {
+ generate_exception_if(in_realmode(ctxt, ops), EXC_UD, -1);
+ generate_exception_if(!mode_ring0(), EXC_GP, 0);
+ fail_if(ops->invlpg == NULL);
+ if ( (rc = ops->invlpg(x86_seg_none, truncate_ea(_regs.eax),
+ ctxt)) )
+ goto done;
+ break;
+ }
+
+ switch ( modrm_reg & 7 )
+ {
+ case 0: /* sgdt */
+ case 1: /* sidt */
+ generate_exception_if(ea.type != OP_MEM, EXC_UD, -1);
+ fail_if(ops->read_segment == NULL);
+ if ( (rc = ops->read_segment((modrm_reg & 1) ?
+ x86_seg_idtr : x86_seg_gdtr,
+ ®, ctxt)) )
+ goto done;
+ if ( op_bytes == 2 )
+ reg.base &= 0xffffff;
+ if ( (rc = ops->write(ea.mem.seg, ea.mem.off+0,
+ reg.limit, 2, ctxt)) ||
+ (rc = ops->write(ea.mem.seg, ea.mem.off+2,
+ reg.base, mode_64bit() ? 8 : 4, ctxt)) )
+ goto done;
+ break;
+ case 2: /* lgdt */
+ case 3: /* lidt */
+ generate_exception_if(ea.type != OP_MEM, EXC_UD, -1);
+ fail_if(ops->write_segment == NULL);
+ memset(®, 0, sizeof(reg));
+ if ( (rc = ops->read(ea.mem.seg, ea.mem.off+0,
+ &limit, 2, ctxt)) ||
+ (rc = ops->read(ea.mem.seg, ea.mem.off+2,
+ &base, mode_64bit() ? 8 : 4, ctxt)) )
+ goto done;
+ reg.base = base;
+ reg.limit = limit;
+ if ( op_bytes == 2 )
+ reg.base &= 0xffffff;
+ if ( (rc = ops->write_segment((modrm_reg & 1) ?
+ x86_seg_idtr : x86_seg_gdtr,
+ ®, ctxt)) )
+ goto done;
+ break;
+ case 4: /* smsw */
+ ea.bytes = 2;
+ dst = ea;
+ fail_if(ops->read_cr == NULL);
+ if ( (rc = ops->read_cr(0, &dst.val, ctxt)) )
+ goto done;
+ d |= Mov; /* force writeback */
+ break;
+ case 6: /* lmsw */
+ fail_if(ops->read_cr == NULL);
+ fail_if(ops->write_cr == NULL);
+ if ( (rc = ops->read_cr(0, &cr0, ctxt)) )
+ goto done;
+ if ( ea.type == OP_REG )
+ cr0w = *ea.reg;
+ else if ( (rc = ops->read(ea.mem.seg, ea.mem.off,
+ &cr0w, 2, ctxt)) )
+ goto done;
+ cr0 &= 0xffff0000;
+ cr0 |= (uint16_t)cr0w;
+ if ( (rc = ops->write_cr(0, cr0, ctxt)) )
+ goto done;
+ break;
+ case 7: /* invlpg */
+ generate_exception_if(!mode_ring0(), EXC_GP, 0);
+ generate_exception_if(ea.type != OP_MEM, EXC_UD, -1);
+ fail_if(ops->invlpg == NULL);
+ if ( (rc = ops->invlpg(ea.mem.seg, ea.mem.off, ctxt)) )
+ goto done;
+ break;
+ default:
+ goto cannot_emulate;
+ }
+ break;
+ }
+
+ case 0x06: /* clts */
+ generate_exception_if(!mode_ring0(), EXC_GP, 0);
+ fail_if((ops->read_cr == NULL) || (ops->write_cr == NULL));
+ if ( (rc = ops->read_cr(0, &dst.val, ctxt)) ||
+ (rc = ops->write_cr(0, dst.val&~8, ctxt)) )
+ goto done;
+ break;
+
+ case 0x08: /* invd */
+ case 0x09: /* wbinvd */
+ generate_exception_if(!mode_ring0(), EXC_GP, 0);
+ fail_if(ops->wbinvd == NULL);
+ if ( (rc = ops->wbinvd(ctxt)) != 0 )
+ goto done;
+ break;
+
+ case 0x0d: /* GrpP (prefetch) */
+ case 0x18: /* Grp16 (prefetch/nop) */
+ case 0x19 ... 0x1f: /* nop (amd-defined) */
+ break;
+
+ case 0x20: /* mov cr,reg */
+ case 0x21: /* mov dr,reg */
+ case 0x22: /* mov reg,cr */
+ case 0x23: /* mov reg,dr */
+ generate_exception_if(ea.type != OP_REG, EXC_UD, -1);
+ generate_exception_if(!mode_ring0(), EXC_GP, 0);
+ modrm_reg |= lock_prefix << 3;
+ if ( b & 2 )
+ {
+ /* Write to CR/DR. */
+ src.val = *(unsigned long *)decode_register(modrm_rm, &_regs, 0);
+ if ( !mode_64bit() )
+ src.val = (uint32_t)src.val;
+ rc = ((b & 1)
+ ? (ops->write_dr
+ ? ops->write_dr(modrm_reg, src.val, ctxt)
+ : X86EMUL_UNHANDLEABLE)
+ : (ops->write_cr
+ ? ops->write_cr(modrm_reg, src.val, ctxt)
+ : X86EMUL_UNHANDLEABLE));
+ }
+ else
+ {
+ /* Read from CR/DR. */
+ dst.type = OP_REG;
+ dst.bytes = mode_64bit() ? 8 : 4;
+ dst.reg = decode_register(modrm_rm, &_regs, 0);
+ rc = ((b & 1)
+ ? (ops->read_dr
+ ? ops->read_dr(modrm_reg, &dst.val, ctxt)
+ : X86EMUL_UNHANDLEABLE)
+ : (ops->read_cr
+ ? ops->read_cr(modrm_reg, &dst.val, ctxt)
+ : X86EMUL_UNHANDLEABLE));
+ }
+ if ( rc != 0 )
+ goto done;
+ break;
+
+ case 0x30: /* wrmsr */ {
+ uint64_t val = ((uint64_t)_regs.edx << 32) | (uint32_t)_regs.eax;
+ generate_exception_if(!mode_ring0(), EXC_GP, 0);
+ fail_if(ops->write_msr == NULL);
+ if ( (rc = ops->write_msr((uint32_t)_regs.ecx, val, ctxt)) != 0 )
+ goto done;
+ break;
+ }
+
+ case 0x31: /* rdtsc */ {
+ unsigned long cr4;
+ uint64_t val;
+ fail_if(ops->read_cr == NULL);
+ if ( (rc = ops->read_cr(4, &cr4, ctxt)) )
+ goto done;
+ generate_exception_if((cr4 & CR4_TSD) && !mode_ring0(), EXC_GP, 0);
+ fail_if(ops->read_msr == NULL);
+ if ( (rc = ops->read_msr(MSR_TSC, &val, ctxt)) != 0 )
+ goto done;
+ _regs.edx = (uint32_t)(val >> 32);
+ _regs.eax = (uint32_t)(val >> 0);
+ break;
+ }
+
+ case 0x32: /* rdmsr */ {
+ uint64_t val;
+ generate_exception_if(!mode_ring0(), EXC_GP, 0);
+ fail_if(ops->read_msr == NULL);
+ if ( (rc = ops->read_msr((uint32_t)_regs.ecx, &val, ctxt)) != 0 )
+ goto done;
+ _regs.edx = (uint32_t)(val >> 32);
+ _regs.eax = (uint32_t)(val >> 0);
+ break;
+ }
+
+ case 0x80 ... 0x8f: /* jcc (near) */ {
+ int rel = (((op_bytes == 2) && !mode_64bit())
+ ? (int32_t)insn_fetch_type(int16_t)
+ : insn_fetch_type(int32_t));
+ if ( test_cc(b, _regs.eflags) )
+ jmp_rel(rel);
+ break;
+ }
+
+ case 0xa0: /* push %%fs */
+ src.val = x86_seg_fs;
+ goto push_seg;
+
+ case 0xa1: /* pop %%fs */
+ src.val = x86_seg_fs;
+ goto pop_seg;
+
+ case 0xa2: /* cpuid */ {
+ unsigned int eax = _regs.eax, ebx = _regs.ebx;
+ unsigned int ecx = _regs.ecx, edx = _regs.edx;
+ fail_if(ops->cpuid == NULL);
+ if ( (rc = ops->cpuid(&eax, &ebx, &ecx, &edx, ctxt)) != 0 )
+ goto done;
+ _regs.eax = eax; _regs.ebx = ebx;
+ _regs.ecx = ecx; _regs.edx = edx;
+ break;
+ }
+
+ case 0xa8: /* push %%gs */
+ src.val = x86_seg_gs;
+ goto push_seg;
+
+ case 0xa9: /* pop %%gs */
+ src.val = x86_seg_gs;
+ goto pop_seg;
+
+ case 0xc7: /* Grp9 (cmpxchg8b) */
+#if defined(__i386__)
+ {
+ unsigned long old_lo, old_hi;
+ generate_exception_if((modrm_reg & 7) != 1, EXC_UD, -1);
+ generate_exception_if(ea.type != OP_MEM, EXC_UD, -1);
+ if ( (rc = ops->read(ea.mem.seg, ea.mem.off+0, &old_lo, 4, ctxt)) ||
+ (rc = ops->read(ea.mem.seg, ea.mem.off+4, &old_hi, 4, ctxt)) )
+ goto done;
+ if ( (old_lo != _regs.eax) || (old_hi != _regs.edx) )
+ {
+ _regs.eax = old_lo;
+ _regs.edx = old_hi;
+ _regs.eflags &= ~EFLG_ZF;
+ }
+ else if ( ops->cmpxchg8b == NULL )
+ {
+ rc = X86EMUL_UNHANDLEABLE;
+ goto done;
+ }
+ else
+ {
+ if ( (rc = ops->cmpxchg8b(ea.mem.seg, ea.mem.off, old_lo, old_hi,
+ _regs.ebx, _regs.ecx, ctxt)) != 0 )
+ goto done;
+ _regs.eflags |= EFLG_ZF;
+ }
+ break;
+ }
+#elif defined(__x86_64__)
+ {
+ unsigned long old, new;
+ generate_exception_if((modrm_reg & 7) != 1, EXC_UD, -1);
+ generate_exception_if(ea.type != OP_MEM, EXC_UD, -1);
+ if ( (rc = ops->read(ea.mem.seg, ea.mem.off, &old, 8, ctxt)) != 0 )
+ goto done;
+ if ( ((uint32_t)(old>>0) != (uint32_t)_regs.eax) ||
+ ((uint32_t)(old>>32) != (uint32_t)_regs.edx) )
+ {
+ _regs.eax = (uint32_t)(old>>0);
+ _regs.edx = (uint32_t)(old>>32);
+ _regs.eflags &= ~EFLG_ZF;
+ }
+ else
+ {
+ new = (_regs.ecx<<32)|(uint32_t)_regs.ebx;
+ if ( (rc = ops->cmpxchg(ea.mem.seg, ea.mem.off, old,
+ new, 8, ctxt)) != 0 )
+ goto done;
+ _regs.eflags |= EFLG_ZF;
+ }
+ break;
+ }
+#endif
+
+ case 0xc8 ... 0xcf: /* bswap */
+ dst.type = OP_REG;
+ dst.reg = decode_register(
+ (b & 7) | ((rex_prefix & 1) << 3), &_regs, 0);
+ switch ( dst.bytes = op_bytes )
+ {
+ default: /* case 2: */
+ /* Undefined behaviour. Writes zero on all tested CPUs. */
+ dst.val = 0;
+ break;
+ case 4:
+#ifdef __x86_64__
+ asm ( "bswap %k0" : "=r" (dst.val) : "0" (*dst.reg) );
+ break;
+ case 8:
+#endif
+ asm ( "bswap %0" : "=r" (dst.val) : "0" (*dst.reg) );
+ break;
+ }
+ break;
+ }
+ goto writeback;
+
+ cannot_emulate:
+ return X86EMUL_UNHANDLEABLE;
+}
diff -r d24f37b31030 -r d434c73ec8b7 xen/arch/x86/x86_emulate/x86_emulate.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/arch/x86/x86_emulate/x86_emulate.h Mon Mar 31 14:21:13 2008 +0100
@@ -0,0 +1,401 @@
+/******************************************************************************
+ * x86_emulate.h
+ *
+ * Generic x86 (32-bit and 64-bit) instruction decoder and emulator.
+ *
+ * Copyright (c) 2005-2007 Keir Fraser
+ * Copyright (c) 2005-2007 XenSource Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __X86_EMULATE_H__
+#define __X86_EMULATE_H__
+
+struct x86_emulate_ctxt;
+
+/* Comprehensive enumeration of x86 segment registers. */
+enum x86_segment {
+ /* General purpose. */
+ x86_seg_cs,
+ x86_seg_ss,
+ x86_seg_ds,
+ x86_seg_es,
+ x86_seg_fs,
+ x86_seg_gs,
+ /* System. */
+ x86_seg_tr,
+ x86_seg_ldtr,
+ x86_seg_gdtr,
+ x86_seg_idtr,
+ /*
+ * Dummy: used to emulate direct processor accesses to management
+ * structures (TSS, GDT, LDT, IDT, etc.) which use linear addressing
+ * (no segment component) and bypass usual segment- and page-level
+ * protection checks.
+ */
+ x86_seg_none
+};
+
+#define is_x86_user_segment(seg) ((unsigned)(seg) <= x86_seg_gs)
+
+/*
+ * Attribute for segment selector. This is a copy of bit 40:47 & 52:55 of the
+ * segment descriptor. It happens to match the format of an AMD SVM VMCB.
+ */
+typedef union segment_attributes {
+ uint16_t bytes;
+ struct
+ {
+ uint16_t type:4; /* 0; Bit 40-43 */
+ uint16_t s: 1; /* 4; Bit 44 */
+ uint16_t dpl: 2; /* 5; Bit 45-46 */
+ uint16_t p: 1; /* 7; Bit 47 */
+ uint16_t avl: 1; /* 8; Bit 52 */
+ uint16_t l: 1; /* 9; Bit 53 */
+ uint16_t db: 1; /* 10; Bit 54 */
+ uint16_t g: 1; /* 11; Bit 55 */
+ } fields;
+} __attribute__ ((packed)) segment_attributes_t;
+
+/*
+ * Full state of a segment register (visible and hidden portions).
+ * Again, this happens to match the format of an AMD SVM VMCB.
+ */
+struct segment_register {
+ uint16_t sel;
+ segment_attributes_t attr;
+ uint32_t limit;
+ uint64_t base;
+} __attribute__ ((packed));
+
+/*
+ * Return codes from state-accessor functions and from x86_emulate().
+ */
+ /* Completed successfully. State modified appropriately. */
+#define X86EMUL_OKAY 0
+ /* Unhandleable access or emulation. No state modified. */
+#define X86EMUL_UNHANDLEABLE 1
+ /* Exception raised and requires delivery. */
+#define X86EMUL_EXCEPTION 2
+ /* Retry the emulation for some reason. No state modified. */
+#define X86EMUL_RETRY 3
+ /* (cmpxchg accessor): CMPXCHG failed. Maps to X86EMUL_RETRY in caller. */
+#define X86EMUL_CMPXCHG_FAILED 3
+
+/*
+ * These operations represent the instruction emulator's interface to memory.
+ *
+ * NOTES:
+ * 1. If the access fails (cannot emulate, or a standard access faults) then
+ * it is up to the memop to propagate the fault to the guest VM via
+ * some out-of-band mechanism, unknown to the emulator. The memop signals
+ * failure by returning X86EMUL_EXCEPTION to the emulator, which will
+ * then immediately bail.
+ * 2. Valid access sizes are 1, 2, 4 and 8 bytes. On x86/32 systems only
+ * cmpxchg8b_emulated need support 8-byte accesses.
+ * 3. The emulator cannot handle 64-bit mode emulation on an x86/32 system.
+ */
+struct x86_emulate_ops
+{
+ /*
+ * All functions:
+ * @ctxt: [IN ] Emulation context info as passed to the emulator.
+ * All memory-access functions:
+ * @seg: [IN ] Segment being dereferenced (specified as x86_seg_??).
+ * @offset:[IN ] Offset within segment.
+ * Read functions:
+ * @val: [OUT] Value read, zero-extended to 'ulong'.
+ * Write functions:
+ * @val: [IN ] Value to write (low-order bytes used as req'd).
+ * Variable-length access functions:
+ * @bytes: [IN ] Number of bytes to read or write.
+ */
+
+ /* read: Emulate a memory read. */
+ int (*read)(
+ enum x86_segment seg,
+ unsigned long offset,
+ unsigned long *val,
+ unsigned int bytes,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * insn_fetch: Emulate fetch from instruction byte stream.
+ * Parameters are same as for 'read'. @seg is always x86_seg_cs.
+ */
+ int (*insn_fetch)(
+ enum x86_segment seg,
+ unsigned long offset,
+ unsigned long *val,
+ unsigned int bytes,
+ struct x86_emulate_ctxt *ctxt);
+
+ /* write: Emulate a memory write. */
+ int (*write)(
+ enum x86_segment seg,
+ unsigned long offset,
+ unsigned long val,
+ unsigned int bytes,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * cmpxchg: Emulate an atomic (LOCKed) CMPXCHG operation.
+ * @old: [IN ] Value expected to be current at @addr.
+ * @new: [IN ] Value to write to @addr.
+ */
+ int (*cmpxchg)(
+ enum x86_segment seg,
+ unsigned long offset,
+ unsigned long old,
+ unsigned long new,
+ unsigned int bytes,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * cmpxchg8b: Emulate an atomic (LOCKed) CMPXCHG8B operation.
+ * @old: [IN ] Value expected to be current at @addr.
+ * @new: [IN ] Value to write to @addr.
+ * NOTES:
+ * 1. This function is only ever called when emulating a real CMPXCHG8B.
+ * 2. This function is *never* called on x86/64 systems.
+ * 2. Not defining this function (i.e., specifying NULL) is equivalent
+ * to defining a function that always returns X86EMUL_UNHANDLEABLE.
+ */
+ int (*cmpxchg8b)(
+ enum x86_segment seg,
+ unsigned long offset,
+ unsigned long old_lo,
+ unsigned long old_hi,
+ unsigned long new_lo,
+ unsigned long new_hi,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * rep_ins: Emulate INS: <src_port> -> <dst_seg:dst_offset>.
+ * @bytes_per_rep: [IN ] Bytes transferred per repetition.
+ * @reps: [IN ] Maximum repetitions to be emulated.
+ * [OUT] Number of repetitions actually emulated.
+ */
+ int (*rep_ins)(
+ uint16_t src_port,
+ enum x86_segment dst_seg,
+ unsigned long dst_offset,
+ unsigned int bytes_per_rep,
+ unsigned long *reps,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * rep_outs: Emulate OUTS: <src_seg:src_offset> -> <dst_port>.
+ * @bytes_per_rep: [IN ] Bytes transferred per repetition.
+ * @reps: [IN ] Maximum repetitions to be emulated.
+ * [OUT] Number of repetitions actually emulated.
+ */
+ int (*rep_outs)(
+ enum x86_segment src_seg,
+ unsigned long src_offset,
+ uint16_t dst_port,
+ unsigned int bytes_per_rep,
+ unsigned long *reps,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * rep_movs: Emulate MOVS: <src_seg:src_offset> -> <dst_seg:dst_offset>.
+ * @bytes_per_rep: [IN ] Bytes transferred per repetition.
+ * @reps: [IN ] Maximum repetitions to be emulated.
+ * [OUT] Number of repetitions actually emulated.
+ */
+ int (*rep_movs)(
+ enum x86_segment src_seg,
+ unsigned long src_offset,
+ enum x86_segment dst_seg,
+ unsigned long dst_offset,
+ unsigned int bytes_per_rep,
+ unsigned long *reps,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * read_segment: Emulate a read of full context of a segment register.
+ * @reg: [OUT] Contents of segment register (visible and hidden state).
+ */
+ int (*read_segment)(
+ enum x86_segment seg,
+ struct segment_register *reg,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * write_segment: Emulate a read of full context of a segment register.
+ * @reg: [OUT] Contents of segment register (visible and hidden state).
+ */
+ int (*write_segment)(
+ enum x86_segment seg,
+ struct segment_register *reg,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * read_io: Read from I/O port(s).
+ * @port: [IN ] Base port for access.
+ */
+ int (*read_io)(
+ unsigned int port,
+ unsigned int bytes,
+ unsigned long *val,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * write_io: Write to I/O port(s).
+ * @port: [IN ] Base port for access.
+ */
+ int (*write_io)(
+ unsigned int port,
+ unsigned int bytes,
+ unsigned long val,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * read_cr: Read from control register.
+ * @reg: [IN ] Register to read (0-15).
+ */
+ int (*read_cr)(
+ unsigned int reg,
+ unsigned long *val,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * write_cr: Write to control register.
+ * @reg: [IN ] Register to write (0-15).
+ */
+ int (*write_cr)(
+ unsigned int reg,
+ unsigned long val,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * read_dr: Read from debug register.
+ * @reg: [IN ] Register to read (0-15).
+ */
+ int (*read_dr)(
+ unsigned int reg,
+ unsigned long *val,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * write_dr: Write to debug register.
+ * @reg: [IN ] Register to write (0-15).
+ */
+ int (*write_dr)(
+ unsigned int reg,
+ unsigned long val,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * read_msr: Read from model-specific register.
+ * @reg: [IN ] Register to read.
+ */
+ int (*read_msr)(
+ unsigned long reg,
+ uint64_t *val,
+ struct x86_emulate_ctxt *ctxt);
+
+ /*
+ * write_dr: Write to model-specific register.
+ * @reg: [IN ] Register to write.
+ */
+ int (*write_msr)(
+ unsigned long reg,
+ uint64_t val,
+ struct x86_emulate_ctxt *ctxt);
+
+ /* wbinvd: Write-back and invalidate cache contents. */
+ int (*wbinvd)(
+ struct x86_emulate_ctxt *ctxt);
+
+ /* cpuid: Emulate CPUID via given set of EAX-EDX inputs/outputs. */
+ int (*cpuid)(
+ unsigned int *eax,
+ unsigned int *ebx,
+ unsigned int *ecx,
+ unsigned int *edx,
+ struct x86_emulate_ctxt *ctxt);
+
+ /* inject_hw_exception */
+ int (*inject_hw_exception)(
+ uint8_t vector,
+ int32_t error_code,
+ struct x86_emulate_ctxt *ctxt);
+
+ /* inject_sw_interrupt */
+ int (*inject_sw_interrupt)(
+ uint8_t vector,
+ uint8_t insn_len,
+ struct x86_emulate_ctxt *ctxt);
+
+ /* load_fpu_ctxt: Load emulated environment's FPU state onto processor. */
+ void (*load_fpu_ctxt)(
+ struct x86_emulate_ctxt *ctxt);
+
+ /* invlpg: Invalidate paging structures which map addressed byte. */
+ int (*invlpg)(
+ enum x86_segment seg,
+ unsigned long offset,
+ struct x86_emulate_ctxt *ctxt);
+};
+
+struct cpu_user_regs;
+
+struct x86_emulate_ctxt
+{
+ /* Register state before/after emulation. */
+ struct cpu_user_regs *regs;
+
+ /* Default address size in current execution mode (16, 32, or 64). */
+ unsigned int addr_size;
+
+ /* Stack pointer width in bits (16, 32 or 64). */
+ unsigned int sp_size;
+
+ /* Set this if writes may have side effects. */
+ uint8_t force_writeback;
+
+ /* Retirement state, set by the emulator (valid only on X86EMUL_OKAY). */
+ union {
+ struct {
+ uint8_t hlt:1; /* Instruction HLTed. */
+ uint8_t mov_ss:1; /* Instruction sets MOV-SS irq shadow. */
+ uint8_t sti:1; /* Instruction sets STI irq shadow. */
+ } flags;
+ uint8_t byte;
+ } retire;
+};
+
+/*
+ * x86_emulate: Emulate an instruction.
+ * Returns -1 on failure, 0 on success.
+ */
+int
+x86_emulate(
+ struct x86_emulate_ctxt *ctxt,
+ struct x86_emulate_ops *ops);
+
+/*
+ * Given the 'reg' portion of a ModRM byte, and a register block, return a
+ * pointer into the block that addresses the relevant register.
+ * @highbyte_regs specifies whether to decode AH,CH,DH,BH.
+ */
+void *
+decode_register(
+ uint8_t modrm_reg, struct cpu_user_regs *regs, int highbyte_regs);
+
+#endif /* __X86_EMULATE_H__ */
diff -r d24f37b31030 -r d434c73ec8b7 xen/include/asm-x86/x86_emulate.h
--- a/xen/include/asm-x86/x86_emulate.h Mon Mar 31 10:40:43 2008 +0100
+++ b/xen/include/asm-x86/x86_emulate.h Mon Mar 31 14:21:13 2008 +0100
@@ -1,401 +1,22 @@
/******************************************************************************
* x86_emulate.h
*
- * Generic x86 (32-bit and 64-bit) instruction decoder and emulator.
+ * Wrapper for generic x86 instruction decoder and emulator.
*
- * Copyright (c) 2005-2007 Keir Fraser
- * Copyright (c) 2005-2007 XenSource Inc.
+ * Copyright (c) 2008, Citrix Systems, Inc.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Authors:
+ * Keir Fraser <keir.fraser@xxxxxxxxxx>
*/
-#ifndef __X86_EMULATE_H__
-#define __X86_EMULATE_H__
+#ifndef __ASM_X86_X86_EMULATE_H__
+#define __ASM_X86_X86_EMULATE_H__
-struct x86_emulate_ctxt;
+#include <xen/config.h>
+#include <xen/types.h>
+#include <xen/lib.h>
+#include <asm/regs.h>
-/* Comprehensive enumeration of x86 segment registers. */
-enum x86_segment {
- /* General purpose. */
- x86_seg_cs,
- x86_seg_ss,
- x86_seg_ds,
- x86_seg_es,
- x86_seg_fs,
- x86_seg_gs,
- /* System. */
- x86_seg_tr,
- x86_seg_ldtr,
- x86_seg_gdtr,
- x86_seg_idtr,
- /*
- * Dummy: used to emulate direct processor accesses to management
- * structures (TSS, GDT, LDT, IDT, etc.) which use linear addressing
- * (no segment component) and bypass usual segment- and page-level
- * protection checks.
- */
- x86_seg_none
-};
+#include "../../arch/x86/x86_emulate/x86_emulate.h"
-#define is_x86_user_segment(seg) ((unsigned)(seg) <= x86_seg_gs)
-
-/*
- * Attribute for segment selector. This is a copy of bit 40:47 & 52:55 of the
- * segment descriptor. It happens to match the format of an AMD SVM VMCB.
- */
-typedef union segment_attributes {
- uint16_t bytes;
- struct
- {
- uint16_t type:4; /* 0; Bit 40-43 */
- uint16_t s: 1; /* 4; Bit 44 */
- uint16_t dpl: 2; /* 5; Bit 45-46 */
- uint16_t p: 1; /* 7; Bit 47 */
- uint16_t avl: 1; /* 8; Bit 52 */
- uint16_t l: 1; /* 9; Bit 53 */
- uint16_t db: 1; /* 10; Bit 54 */
- uint16_t g: 1; /* 11; Bit 55 */
- } fields;
-} __attribute__ ((packed)) segment_attributes_t;
-
-/*
- * Full state of a segment register (visible and hidden portions).
- * Again, this happens to match the format of an AMD SVM VMCB.
- */
-struct segment_register {
- uint16_t sel;
- segment_attributes_t attr;
- uint32_t limit;
- uint64_t base;
-} __attribute__ ((packed));
-
-/*
- * Return codes from state-accessor functions and from x86_emulate().
- */
- /* Completed successfully. State modified appropriately. */
-#define X86EMUL_OKAY 0
- /* Unhandleable access or emulation. No state modified. */
-#define X86EMUL_UNHANDLEABLE 1
- /* Exception raised and requires delivery. */
-#define X86EMUL_EXCEPTION 2
- /* Retry the emulation for some reason. No state modified. */
-#define X86EMUL_RETRY 3
- /* (cmpxchg accessor): CMPXCHG failed. Maps to X86EMUL_RETRY in caller. */
-#define X86EMUL_CMPXCHG_FAILED 3
-
-/*
- * These operations represent the instruction emulator's interface to memory.
- *
- * NOTES:
- * 1. If the access fails (cannot emulate, or a standard access faults) then
- * it is up to the memop to propagate the fault to the guest VM via
- * some out-of-band mechanism, unknown to the emulator. The memop signals
- * failure by returning X86EMUL_EXCEPTION to the emulator, which will
- * then immediately bail.
- * 2. Valid access sizes are 1, 2, 4 and 8 bytes. On x86/32 systems only
- * cmpxchg8b_emulated need support 8-byte accesses.
- * 3. The emulator cannot handle 64-bit mode emulation on an x86/32 system.
- */
-struct x86_emulate_ops
-{
- /*
- * All functions:
- * @ctxt: [IN ] Emulation context info as passed to the emulator.
- * All memory-access functions:
- * @seg: [IN ] Segment being dereferenced (specified as x86_seg_??).
- * @offset:[IN ] Offset within segment.
- * Read functions:
- * @val: [OUT] Value read, zero-extended to 'ulong'.
- * Write functions:
- * @val: [IN ] Value to write (low-order bytes used as req'd).
- * Variable-length access functions:
- * @bytes: [IN ] Number of bytes to read or write.
- */
-
- /* read: Emulate a memory read. */
- int (*read)(
- enum x86_segment seg,
- unsigned long offset,
- unsigned long *val,
- unsigned int bytes,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * insn_fetch: Emulate fetch from instruction byte stream.
- * Parameters are same as for 'read'. @seg is always x86_seg_cs.
- */
- int (*insn_fetch)(
- enum x86_segment seg,
- unsigned long offset,
- unsigned long *val,
- unsigned int bytes,
- struct x86_emulate_ctxt *ctxt);
-
- /* write: Emulate a memory write. */
- int (*write)(
- enum x86_segment seg,
- unsigned long offset,
- unsigned long val,
- unsigned int bytes,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * cmpxchg: Emulate an atomic (LOCKed) CMPXCHG operation.
- * @old: [IN ] Value expected to be current at @addr.
- * @new: [IN ] Value to write to @addr.
- */
- int (*cmpxchg)(
- enum x86_segment seg,
- unsigned long offset,
- unsigned long old,
- unsigned long new,
- unsigned int bytes,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * cmpxchg8b: Emulate an atomic (LOCKed) CMPXCHG8B operation.
- * @old: [IN ] Value expected to be current at @addr.
- * @new: [IN ] Value to write to @addr.
- * NOTES:
- * 1. This function is only ever called when emulating a real CMPXCHG8B.
- * 2. This function is *never* called on x86/64 systems.
- * 2. Not defining this function (i.e., specifying NULL) is equivalent
- * to defining a function that always returns X86EMUL_UNHANDLEABLE.
- */
- int (*cmpxchg8b)(
- enum x86_segment seg,
- unsigned long offset,
- unsigned long old_lo,
- unsigned long old_hi,
- unsigned long new_lo,
- unsigned long new_hi,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * rep_ins: Emulate INS: <src_port> -> <dst_seg:dst_offset>.
- * @bytes_per_rep: [IN ] Bytes transferred per repetition.
- * @reps: [IN ] Maximum repetitions to be emulated.
- * [OUT] Number of repetitions actually emulated.
- */
- int (*rep_ins)(
- uint16_t src_port,
- enum x86_segment dst_seg,
- unsigned long dst_offset,
- unsigned int bytes_per_rep,
- unsigned long *reps,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * rep_outs: Emulate OUTS: <src_seg:src_offset> -> <dst_port>.
- * @bytes_per_rep: [IN ] Bytes transferred per repetition.
- * @reps: [IN ] Maximum repetitions to be emulated.
- * [OUT] Number of repetitions actually emulated.
- */
- int (*rep_outs)(
- enum x86_segment src_seg,
- unsigned long src_offset,
- uint16_t dst_port,
- unsigned int bytes_per_rep,
- unsigned long *reps,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * rep_movs: Emulate MOVS: <src_seg:src_offset> -> <dst_seg:dst_offset>.
- * @bytes_per_rep: [IN ] Bytes transferred per repetition.
- * @reps: [IN ] Maximum repetitions to be emulated.
- * [OUT] Number of repetitions actually emulated.
- */
- int (*rep_movs)(
- enum x86_segment src_seg,
- unsigned long src_offset,
- enum x86_segment dst_seg,
- unsigned long dst_offset,
- unsigned int bytes_per_rep,
- unsigned long *reps,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * read_segment: Emulate a read of full context of a segment register.
- * @reg: [OUT] Contents of segment register (visible and hidden state).
- */
- int (*read_segment)(
- enum x86_segment seg,
- struct segment_register *reg,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * write_segment: Emulate a read of full context of a segment register.
- * @reg: [OUT] Contents of segment register (visible and hidden state).
- */
- int (*write_segment)(
- enum x86_segment seg,
- struct segment_register *reg,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * read_io: Read from I/O port(s).
- * @port: [IN ] Base port for access.
- */
- int (*read_io)(
- unsigned int port,
- unsigned int bytes,
- unsigned long *val,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * write_io: Write to I/O port(s).
- * @port: [IN ] Base port for access.
- */
- int (*write_io)(
- unsigned int port,
- unsigned int bytes,
- unsigned long val,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * read_cr: Read from control register.
- * @reg: [IN ] Register to read (0-15).
- */
- int (*read_cr)(
- unsigned int reg,
- unsigned long *val,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * write_cr: Write to control register.
- * @reg: [IN ] Register to write (0-15).
- */
- int (*write_cr)(
- unsigned int reg,
- unsigned long val,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * read_dr: Read from debug register.
- * @reg: [IN ] Register to read (0-15).
- */
- int (*read_dr)(
- unsigned int reg,
- unsigned long *val,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * write_dr: Write to debug register.
- * @reg: [IN ] Register to write (0-15).
- */
- int (*write_dr)(
- unsigned int reg,
- unsigned long val,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * read_msr: Read from model-specific register.
- * @reg: [IN ] Register to read.
- */
- int (*read_msr)(
- unsigned long reg,
- uint64_t *val,
- struct x86_emulate_ctxt *ctxt);
-
- /*
- * write_dr: Write to model-specific register.
- * @reg: [IN ] Register to write.
- */
- int (*write_msr)(
- unsigned long reg,
- uint64_t val,
- struct x86_emulate_ctxt *ctxt);
-
- /* wbinvd: Write-back and invalidate cache contents. */
- int (*wbinvd)(
- struct x86_emulate_ctxt *ctxt);
-
- /* cpuid: Emulate CPUID via given set of EAX-EDX inputs/outputs. */
- int (*cpuid)(
- unsigned int *eax,
- unsigned int *ebx,
- unsigned int *ecx,
- unsigned int *edx,
- struct x86_emulate_ctxt *ctxt);
-
- /* inject_hw_exception */
- int (*inject_hw_exception)(
- uint8_t vector,
- int32_t error_code,
- struct x86_emulate_ctxt *ctxt);
-
- /* inject_sw_interrupt */
- int (*inject_sw_interrupt)(
- uint8_t vector,
- uint8_t insn_len,
- struct x86_emulate_ctxt *ctxt);
-
- /* load_fpu_ctxt: Load emulated environment's FPU state onto processor. */
- void (*load_fpu_ctxt)(
- struct x86_emulate_ctxt *ctxt);
-
- /* invlpg: Invalidate paging structures which map addressed byte. */
- int (*invlpg)(
- enum x86_segment seg,
- unsigned long offset,
- struct x86_emulate_ctxt *ctxt);
-};
-
-struct cpu_user_regs;
-
-struct x86_emulate_ctxt
-{
- /* Register state before/after emulation. */
- struct cpu_user_regs *regs;
-
- /* Default address size in current execution mode (16, 32, or 64). */
- unsigned int addr_size;
-
- /* Stack pointer width in bits (16, 32 or 64). */
- unsigned int sp_size;
-
- /* Set this if writes may have side effects. */
- uint8_t force_writeback;
-
- /* Retirement state, set by the emulator (valid only on X86EMUL_OKAY). */
- union {
- struct {
- uint8_t hlt:1; /* Instruction HLTed. */
- uint8_t mov_ss:1; /* Instruction sets MOV-SS irq shadow. */
- uint8_t sti:1; /* Instruction sets STI irq shadow. */
- } flags;
- uint8_t byte;
- } retire;
-};
-
-/*
- * x86_emulate: Emulate an instruction.
- * Returns -1 on failure, 0 on success.
- */
-int
-x86_emulate(
- struct x86_emulate_ctxt *ctxt,
- struct x86_emulate_ops *ops);
-
-/*
- * Given the 'reg' portion of a ModRM byte, and a register block, return a
- * pointer into the block that addresses the relevant register.
- * @highbyte_regs specifies whether to decode AH,CH,DH,BH.
- */
-void *
-decode_register(
- uint8_t modrm_reg, struct cpu_user_regs *regs, int highbyte_regs);
-
-#endif /* __X86_EMULATE_H__ */
+#endif /* __ASM_X86_X86_EMULATE_H__ */
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