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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] xen/ia64 uaccess is still linux style with different declaration as
# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 0cb40b7f784065dcd488fe75ded65cdb41bb7d7e
# Parent cc9ed0eea55aa7b4a2e014f11d97b2e6cac113eb
xen/ia64 uaccess is still linux style with different declaration as
common xen. It's meaningless to patch original file with many #ifdef
XEN, and so instead copy that file to create a new xen specific
uaccess file, with unused lines removed. May need render later.
Or else it breaks compilation on xen-unstable.
Signed-off-by Kevin Tian <kevin.tian@xxxxxxxxx>
diff -r cc9ed0eea55a -r 0cb40b7f7840 xen/include/asm-ia64/config.h
--- a/xen/include/asm-ia64/config.h Mon Feb 27 15:20:23 2006
+++ b/xen/include/asm-ia64/config.h Mon Feb 27 15:22:02 2006
@@ -195,11 +195,6 @@
#define find_first_set_bit(x) (ffs(x)-1) // FIXME: Is this right???
-// from include/asm-x86/*/uaccess.h
-#define array_access_ok(addr,count,size) \
- (likely(sizeof(count) <= 4) /* disallow 64-bit counts */ && \
- access_ok(type,addr,count*size))
-
// see drivers/char/console.c
#ifndef VALIDATE_VT
#define OPT_CONSOLE_STR "com1"
@@ -306,7 +301,6 @@
#define raw_smp_processor_id() 0
#endif
-
#ifndef __ASSEMBLY__
#include <linux/linkage.h>
#endif
diff -r cc9ed0eea55a -r 0cb40b7f7840
xen/include/asm-ia64/linux-xen/asm/README.origin
--- a/xen/include/asm-ia64/linux-xen/asm/README.origin Mon Feb 27 15:20:23 2006
+++ b/xen/include/asm-ia64/linux-xen/asm/README.origin Mon Feb 27 15:22:02 2006
@@ -20,4 +20,3 @@
system.h -> linux/include/asm-ia64/system.h
tlbflush.h -> linux/include/asm-ia64/tlbflush.h
types.h -> linux/include/asm-ia64/types.h
-uaccess.h -> linux/include/asm-ia64/uaccess.h
diff -r cc9ed0eea55a -r 0cb40b7f7840 xen/include/asm-ia64/uaccess.h
--- /dev/null Mon Feb 27 15:20:23 2006
+++ b/xen/include/asm-ia64/uaccess.h Mon Feb 27 15:22:02 2006
@@ -0,0 +1,285 @@
+#ifndef _ASM_IA64_UACCESS_H
+#define _ASM_IA64_UACCESS_H
+
+/*
+ * This file defines various macros to transfer memory areas across
+ * the user/kernel boundary. This needs to be done carefully because
+ * this code is executed in kernel mode and uses user-specified
+ * addresses. Thus, we need to be careful not to let the user to
+ * trick us into accessing kernel memory that would normally be
+ * inaccessible. This code is also fairly performance sensitive,
+ * so we want to spend as little time doing safety checks as
+ * possible.
+ *
+ * To make matters a bit more interesting, these macros sometimes also
+ * called from within the kernel itself, in which case the address
+ * validity check must be skipped. The get_fs() macro tells us what
+ * to do: if get_fs()==USER_DS, checking is performed, if
+ * get_fs()==KERNEL_DS, checking is bypassed.
+ *
+ * Note that even if the memory area specified by the user is in a
+ * valid address range, it is still possible that we'll get a page
+ * fault while accessing it. This is handled by filling out an
+ * exception handler fixup entry for each instruction that has the
+ * potential to fault. When such a fault occurs, the page fault
+ * handler checks to see whether the faulting instruction has a fixup
+ * associated and, if so, sets r8 to -EFAULT and clears r9 to 0 and
+ * then resumes execution at the continuation point.
+ *
+ * Based on <asm-alpha/uaccess.h>.
+ *
+ * Copyright (C) 1998, 1999, 2001-2004 Hewlett-Packard Co
+ * David Mosberger-Tang <davidm@xxxxxxxxxx>
+ */
+
+#include <linux/compiler.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/page-flags.h>
+#include <linux/mm.h>
+
+#include <asm/intrinsics.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+
+#define IS_VMM_ADDRESS(addr) ((((addr) >> 60) ^ ((addr) >> 59)) & 1)
+#define __access_ok(addr) (!IS_VMM_ADDRESS((unsigned long)(addr)))
+#define access_ok(addr, size) (__access_ok(addr))
+#define array_access_ok(addr,count,size)( __access_ok(addr))
+
+/*
+ * These are the main single-value transfer routines. They automatically
+ * use the right size if we just have the right pointer type.
+ *
+ * Careful to not
+ * (a) re-use the arguments for side effects (sizeof/typeof is ok)
+ * (b) require any knowledge of processes at this stage
+ */
+#define put_user(x, ptr) __put_user_check((__typeof__(*(ptr))) (x),
(ptr), sizeof(*(ptr)), get_fs())
+#define get_user(x, ptr) __get_user_check((x), (ptr), sizeof(*(ptr)),
get_fs())
+
+/*
+ * The "__xxx" versions do not do address space checking, useful when
+ * doing multiple accesses to the same area (the programmer has to do the
+ * checks by hand with "access_ok()")
+ */
+#define __put_user(x, ptr) __put_user_nocheck((__typeof__(*(ptr))) (x),
(ptr), sizeof(*(ptr)))
+#define __get_user(x, ptr) __get_user_nocheck((x), (ptr), sizeof(*(ptr)))
+
+extern long __put_user_unaligned_unknown (void);
+
+#define __put_user_unaligned(x, ptr)
\
+({
\
+ long __ret;
\
+ switch (sizeof(*(ptr))) {
\
+ case 1: __ret = __put_user((x), (ptr)); break;
\
+ case 2: __ret = (__put_user((x), (u8 __user *)(ptr)))
\
+ | (__put_user((x) >> 8, ((u8 __user *)(ptr) + 1)));
break; \
+ case 4: __ret = (__put_user((x), (u16 __user *)(ptr)))
\
+ | (__put_user((x) >> 16, ((u16 __user *)(ptr) + 1)));
break; \
+ case 8: __ret = (__put_user((x), (u32 __user *)(ptr)))
\
+ | (__put_user((x) >> 32, ((u32 __user *)(ptr) + 1)));
break; \
+ default: __ret = __put_user_unaligned_unknown();
\
+ }
\
+ __ret;
\
+})
+
+extern long __get_user_unaligned_unknown (void);
+
+#define __get_user_unaligned(x, ptr)
\
+({
\
+ long __ret;
\
+ switch (sizeof(*(ptr))) {
\
+ case 1: __ret = __get_user((x), (ptr)); break;
\
+ case 2: __ret = (__get_user((x), (u8 __user *)(ptr)))
\
+ | (__get_user((x) >> 8, ((u8 __user *)(ptr) + 1)));
break; \
+ case 4: __ret = (__get_user((x), (u16 __user *)(ptr)))
\
+ | (__get_user((x) >> 16, ((u16 __user *)(ptr) + 1)));
break; \
+ case 8: __ret = (__get_user((x), (u32 __user *)(ptr)))
\
+ | (__get_user((x) >> 32, ((u32 __user *)(ptr) + 1)));
break; \
+ default: __ret = __get_user_unaligned_unknown();
\
+ }
\
+ __ret;
\
+})
+
+#ifdef ASM_SUPPORTED
+ struct __large_struct { unsigned long buf[100]; };
+# define __m(x) (*(struct __large_struct __user *)(x))
+
+/* We need to declare the __ex_table section before we can use it in .xdata.
*/
+asm (".section \"__ex_table\", \"a\"\n\t.previous");
+
+# define __get_user_size(val, addr, n, err)
\
+do {
\
+ register long __gu_r8 asm ("r8") = 0;
\
+ register long __gu_r9 asm ("r9");
\
+ asm ("\n[1:]\tld"#n" %0=%2%P2\t// %0 and %1 get overwritten by
exception handler\n" \
+ "\t.xdata4 \"__ex_table\", 1b-., 1f-.+4\n"
\
+ "[1:]"
\
+ : "=r"(__gu_r9), "=r"(__gu_r8) : "m"(__m(addr)), "1"(__gu_r8));
\
+ (err) = __gu_r8;
\
+ (val) = __gu_r9;
\
+} while (0)
+
+/*
+ * The "__put_user_size()" macro tells gcc it reads from memory instead of
writing it. This
+ * is because they do not write to any memory gcc knows about, so there are no
aliasing
+ * issues.
+ */
+# define __put_user_size(val, addr, n, err)
\
+do {
\
+ register long __pu_r8 asm ("r8") = 0;
\
+ asm volatile ("\n[1:]\tst"#n" %1=%r2%P1\t// %0 gets overwritten by
exception handler\n" \
+ "\t.xdata4 \"__ex_table\", 1b-., 1f-.\n"
\
+ "[1:]"
\
+ : "=r"(__pu_r8) : "m"(__m(addr)), "rO"(val),
"0"(__pu_r8)); \
+ (err) = __pu_r8;
\
+} while (0)
+
+#else /* !ASM_SUPPORTED */
+# define RELOC_TYPE 2 /* ip-rel */
+# define __get_user_size(val, addr, n, err) \
+do { \
+ __ld_user("__ex_table", (unsigned long) addr, n, RELOC_TYPE); \
+ (err) = ia64_getreg(_IA64_REG_R8); \
+ (val) = ia64_getreg(_IA64_REG_R9); \
+} while (0)
+# define __put_user_size(val, addr, n, err)
\
+do {
\
+ __st_user("__ex_table", (unsigned long) addr, n, RELOC_TYPE, (unsigned
long) (val)); \
+ (err) = ia64_getreg(_IA64_REG_R8);
\
+} while (0)
+#endif /* !ASM_SUPPORTED */
+
+extern void __get_user_unknown (void);
+
+/*
+ * Evaluating arguments X, PTR, SIZE, and SEGMENT may involve
subroutine-calls, which
+ * could clobber r8 and r9 (among others). Thus, be careful not to evaluate
it while
+ * using r8/r9.
+ */
+#define __do_get_user(check, x, ptr, size, segment)
\
+({
\
+ const __typeof__(*(ptr)) __user *__gu_ptr = (ptr);
\
+ __typeof__ (size) __gu_size = (size);
\
+ long __gu_err = -EFAULT, __gu_val = 0;
\
+
\
+ if (!check || __access_ok(__gu_ptr))
\
+ switch (__gu_size) {
\
+ case 1: __get_user_size(__gu_val, __gu_ptr, 1, __gu_err);
break; \
+ case 2: __get_user_size(__gu_val, __gu_ptr, 2, __gu_err);
break; \
+ case 4: __get_user_size(__gu_val, __gu_ptr, 4, __gu_err);
break; \
+ case 8: __get_user_size(__gu_val, __gu_ptr, 8, __gu_err);
break; \
+ default: __get_user_unknown(); break;
\
+ }
\
+ (x) = (__typeof__(*(__gu_ptr))) __gu_val;
\
+ __gu_err;
\
+})
+
+#define __get_user_nocheck(x, ptr, size) __do_get_user(0, x, ptr, size,
KERNEL_DS)
+#define __get_user_check(x, ptr, size, segment) __do_get_user(1, x,
ptr, size, segment)
+
+extern void __put_user_unknown (void);
+
+/*
+ * Evaluating arguments X, PTR, SIZE, and SEGMENT may involve
subroutine-calls, which
+ * could clobber r8 (among others). Thus, be careful not to evaluate them
while using r8.
+ */
+#define __do_put_user(check, x, ptr, size, segment)
\
+({
\
+ __typeof__ (x) __pu_x = (x);
\
+ __typeof__ (*(ptr)) __user *__pu_ptr = (ptr);
\
+ __typeof__ (size) __pu_size = (size);
\
+ long __pu_err = -EFAULT;
\
+
\
+ if (!check || __access_ok(__pu_ptr))
\
+ switch (__pu_size) {
\
+ case 1: __put_user_size(__pu_x, __pu_ptr, 1, __pu_err);
break; \
+ case 2: __put_user_size(__pu_x, __pu_ptr, 2, __pu_err);
break; \
+ case 4: __put_user_size(__pu_x, __pu_ptr, 4, __pu_err);
break; \
+ case 8: __put_user_size(__pu_x, __pu_ptr, 8, __pu_err);
break; \
+ default: __put_user_unknown(); break;
\
+ }
\
+ __pu_err;
\
+})
+
+#define __put_user_nocheck(x, ptr, size) __do_put_user(0, x, ptr, size,
KERNEL_DS)
+#define __put_user_check(x, ptr, size, segment) __do_put_user(1, x,
ptr, size, segment)
+
+/*
+ * Complex access routines
+ */
+extern unsigned long __must_check __copy_user (void __user *to, const void
__user *from,
+ unsigned long count);
+
+static inline unsigned long
+__copy_to_user (void __user *to, const void *from, unsigned long count)
+{
+ return __copy_user(to, (void __user *) from, count);
+}
+
+static inline unsigned long
+__copy_from_user (void *to, const void __user *from, unsigned long count)
+{
+ return __copy_user((void __user *) to, from, count);
+}
+
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
+#define copy_to_user(to, from, n)
\
+({
\
+ void __user *__cu_to = (to);
\
+ const void *__cu_from = (from);
\
+ long __cu_len = (n);
\
+
\
+ if (__access_ok(__cu_to))
\
+ __cu_len = __copy_user(__cu_to, (void __user *) __cu_from,
__cu_len); \
+ __cu_len;
\
+})
+
+#define copy_from_user(to, from, n)
\
+({
\
+ void *__cu_to = (to);
\
+ const void __user *__cu_from = (from);
\
+ long __cu_len = (n);
\
+
\
+ __chk_user_ptr(__cu_from);
\
+ if (__access_ok(__cu_from))
\
+ __cu_len = __copy_user((void __user *) __cu_to, __cu_from,
__cu_len); \
+ __cu_len;
\
+})
+
+#define __copy_in_user(to, from, size) __copy_user((to), (from), (size))
+
+static inline unsigned long
+copy_in_user (void __user *to, const void __user *from, unsigned long n)
+{
+ if (likely(access_ok(from, n) && access_ok(to, n)))
+ n = __copy_user(to, from, n);
+ return n;
+}
+
+#define ARCH_HAS_SORT_EXTABLE
+#define ARCH_HAS_SEARCH_EXTABLE
+
+struct exception_table_entry {
+ int addr; /* location-relative address of insn this fixup is for
*/
+ int cont; /* location-relative continuation addr.; if bit 2 is
set, r9 is set to 0 */
+};
+
+extern void ia64_handle_exception (struct pt_regs *regs, const struct
exception_table_entry *e);
+extern const struct exception_table_entry *search_exception_tables (unsigned
long addr);
+
+static inline int
+ia64_done_with_exception (struct pt_regs *regs)
+{
+ const struct exception_table_entry *e;
+ e = search_exception_tables(regs->cr_iip + ia64_psr(regs)->ri);
+ if (e) {
+ ia64_handle_exception(regs, e);
+ return 1;
+ }
+ return 0;
+}
+
+#endif /* _ASM_IA64_UACCESS_H */
diff -r cc9ed0eea55a -r 0cb40b7f7840
xen/include/asm-ia64/linux-xen/asm/uaccess.h
--- a/xen/include/asm-ia64/linux-xen/asm/uaccess.h Mon Feb 27 15:20:23 2006
+++ /dev/null Mon Feb 27 15:22:02 2006
@@ -1,415 +0,0 @@
-#ifndef _ASM_IA64_UACCESS_H
-#define _ASM_IA64_UACCESS_H
-
-/*
- * This file defines various macros to transfer memory areas across
- * the user/kernel boundary. This needs to be done carefully because
- * this code is executed in kernel mode and uses user-specified
- * addresses. Thus, we need to be careful not to let the user to
- * trick us into accessing kernel memory that would normally be
- * inaccessible. This code is also fairly performance sensitive,
- * so we want to spend as little time doing safety checks as
- * possible.
- *
- * To make matters a bit more interesting, these macros sometimes also
- * called from within the kernel itself, in which case the address
- * validity check must be skipped. The get_fs() macro tells us what
- * to do: if get_fs()==USER_DS, checking is performed, if
- * get_fs()==KERNEL_DS, checking is bypassed.
- *
- * Note that even if the memory area specified by the user is in a
- * valid address range, it is still possible that we'll get a page
- * fault while accessing it. This is handled by filling out an
- * exception handler fixup entry for each instruction that has the
- * potential to fault. When such a fault occurs, the page fault
- * handler checks to see whether the faulting instruction has a fixup
- * associated and, if so, sets r8 to -EFAULT and clears r9 to 0 and
- * then resumes execution at the continuation point.
- *
- * Based on <asm-alpha/uaccess.h>.
- *
- * Copyright (C) 1998, 1999, 2001-2004 Hewlett-Packard Co
- * David Mosberger-Tang <davidm@xxxxxxxxxx>
- */
-
-#include <linux/compiler.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/page-flags.h>
-#include <linux/mm.h>
-
-#include <asm/intrinsics.h>
-#include <asm/pgtable.h>
-#include <asm/io.h>
-
-/*
- * For historical reasons, the following macros are grossly misnamed:
- */
-#define KERNEL_DS ((mm_segment_t) { ~0UL }) /* cf.
access_ok() */
-#define USER_DS ((mm_segment_t) { TASK_SIZE-1 }) /* cf.
access_ok() */
-
-#define VERIFY_READ 0
-#define VERIFY_WRITE 1
-
-#define get_ds() (KERNEL_DS)
-#define get_fs() (current_thread_info()->addr_limit)
-#define set_fs(x) (current_thread_info()->addr_limit = (x))
-
-#define segment_eq(a, b) ((a).seg == (b).seg)
-
-/*
- * When accessing user memory, we need to make sure the entire area really is
in
- * user-level space. In order to do this efficiently, we make sure that the
page at
- * address TASK_SIZE is never valid. We also need to make sure that the
address doesn't
- * point inside the virtually mapped linear page table.
- */
-#ifdef XEN
-#define IS_VMM_ADDRESS(addr) ((((addr) >> 60) ^ ((addr) >> 59)) & 1)
-#define __access_ok(addr, size, segment) (!IS_VMM_ADDRESS((unsigned
long)(addr)))
-#else
-#define __access_ok(addr, size, segment)
\
-({
\
- __chk_user_ptr(addr);
\
- (likely((unsigned long) (addr) <= (segment).seg)
\
- && ((segment).seg == KERNEL_DS.seg
\
- || likely(REGION_OFFSET((unsigned long) (addr)) <
RGN_MAP_LIMIT))); \
-})
-#endif
-#define access_ok(type, addr, size) __access_ok((addr), (size), get_fs())
-
-/* this function will go away soon - use access_ok() instead */
-static inline int __deprecated
-verify_area (int type, const void __user *addr, unsigned long size)
-{
- return access_ok(type, addr, size) ? 0 : -EFAULT;
-}
-
-/*
- * These are the main single-value transfer routines. They automatically
- * use the right size if we just have the right pointer type.
- *
- * Careful to not
- * (a) re-use the arguments for side effects (sizeof/typeof is ok)
- * (b) require any knowledge of processes at this stage
- */
-#define put_user(x, ptr) __put_user_check((__typeof__(*(ptr))) (x),
(ptr), sizeof(*(ptr)), get_fs())
-#define get_user(x, ptr) __get_user_check((x), (ptr), sizeof(*(ptr)),
get_fs())
-
-/*
- * The "__xxx" versions do not do address space checking, useful when
- * doing multiple accesses to the same area (the programmer has to do the
- * checks by hand with "access_ok()")
- */
-#define __put_user(x, ptr) __put_user_nocheck((__typeof__(*(ptr))) (x),
(ptr), sizeof(*(ptr)))
-#define __get_user(x, ptr) __get_user_nocheck((x), (ptr), sizeof(*(ptr)))
-
-extern long __put_user_unaligned_unknown (void);
-
-#define __put_user_unaligned(x, ptr)
\
-({
\
- long __ret;
\
- switch (sizeof(*(ptr))) {
\
- case 1: __ret = __put_user((x), (ptr)); break;
\
- case 2: __ret = (__put_user((x), (u8 __user *)(ptr)))
\
- | (__put_user((x) >> 8, ((u8 __user *)(ptr) + 1)));
break; \
- case 4: __ret = (__put_user((x), (u16 __user *)(ptr)))
\
- | (__put_user((x) >> 16, ((u16 __user *)(ptr) + 1)));
break; \
- case 8: __ret = (__put_user((x), (u32 __user *)(ptr)))
\
- | (__put_user((x) >> 32, ((u32 __user *)(ptr) + 1)));
break; \
- default: __ret = __put_user_unaligned_unknown();
\
- }
\
- __ret;
\
-})
-
-extern long __get_user_unaligned_unknown (void);
-
-#define __get_user_unaligned(x, ptr)
\
-({
\
- long __ret;
\
- switch (sizeof(*(ptr))) {
\
- case 1: __ret = __get_user((x), (ptr)); break;
\
- case 2: __ret = (__get_user((x), (u8 __user *)(ptr)))
\
- | (__get_user((x) >> 8, ((u8 __user *)(ptr) + 1)));
break; \
- case 4: __ret = (__get_user((x), (u16 __user *)(ptr)))
\
- | (__get_user((x) >> 16, ((u16 __user *)(ptr) + 1)));
break; \
- case 8: __ret = (__get_user((x), (u32 __user *)(ptr)))
\
- | (__get_user((x) >> 32, ((u32 __user *)(ptr) + 1)));
break; \
- default: __ret = __get_user_unaligned_unknown();
\
- }
\
- __ret;
\
-})
-
-#ifdef ASM_SUPPORTED
- struct __large_struct { unsigned long buf[100]; };
-# define __m(x) (*(struct __large_struct __user *)(x))
-
-/* We need to declare the __ex_table section before we can use it in .xdata.
*/
-asm (".section \"__ex_table\", \"a\"\n\t.previous");
-
-# define __get_user_size(val, addr, n, err)
\
-do {
\
- register long __gu_r8 asm ("r8") = 0;
\
- register long __gu_r9 asm ("r9");
\
- asm ("\n[1:]\tld"#n" %0=%2%P2\t// %0 and %1 get overwritten by
exception handler\n" \
- "\t.xdata4 \"__ex_table\", 1b-., 1f-.+4\n"
\
- "[1:]"
\
- : "=r"(__gu_r9), "=r"(__gu_r8) : "m"(__m(addr)), "1"(__gu_r8));
\
- (err) = __gu_r8;
\
- (val) = __gu_r9;
\
-} while (0)
-
-/*
- * The "__put_user_size()" macro tells gcc it reads from memory instead of
writing it. This
- * is because they do not write to any memory gcc knows about, so there are no
aliasing
- * issues.
- */
-# define __put_user_size(val, addr, n, err)
\
-do {
\
- register long __pu_r8 asm ("r8") = 0;
\
- asm volatile ("\n[1:]\tst"#n" %1=%r2%P1\t// %0 gets overwritten by
exception handler\n" \
- "\t.xdata4 \"__ex_table\", 1b-., 1f-.\n"
\
- "[1:]"
\
- : "=r"(__pu_r8) : "m"(__m(addr)), "rO"(val),
"0"(__pu_r8)); \
- (err) = __pu_r8;
\
-} while (0)
-
-#else /* !ASM_SUPPORTED */
-# define RELOC_TYPE 2 /* ip-rel */
-# define __get_user_size(val, addr, n, err) \
-do { \
- __ld_user("__ex_table", (unsigned long) addr, n, RELOC_TYPE); \
- (err) = ia64_getreg(_IA64_REG_R8); \
- (val) = ia64_getreg(_IA64_REG_R9); \
-} while (0)
-# define __put_user_size(val, addr, n, err)
\
-do {
\
- __st_user("__ex_table", (unsigned long) addr, n, RELOC_TYPE, (unsigned
long) (val)); \
- (err) = ia64_getreg(_IA64_REG_R8);
\
-} while (0)
-#endif /* !ASM_SUPPORTED */
-
-extern void __get_user_unknown (void);
-
-/*
- * Evaluating arguments X, PTR, SIZE, and SEGMENT may involve
subroutine-calls, which
- * could clobber r8 and r9 (among others). Thus, be careful not to evaluate
it while
- * using r8/r9.
- */
-#define __do_get_user(check, x, ptr, size, segment)
\
-({
\
- const __typeof__(*(ptr)) __user *__gu_ptr = (ptr);
\
- __typeof__ (size) __gu_size = (size);
\
- long __gu_err = -EFAULT, __gu_val = 0;
\
-
\
- if (!check || __access_ok(__gu_ptr, size, segment))
\
- switch (__gu_size) {
\
- case 1: __get_user_size(__gu_val, __gu_ptr, 1, __gu_err);
break; \
- case 2: __get_user_size(__gu_val, __gu_ptr, 2, __gu_err);
break; \
- case 4: __get_user_size(__gu_val, __gu_ptr, 4, __gu_err);
break; \
- case 8: __get_user_size(__gu_val, __gu_ptr, 8, __gu_err);
break; \
- default: __get_user_unknown(); break;
\
- }
\
- (x) = (__typeof__(*(__gu_ptr))) __gu_val;
\
- __gu_err;
\
-})
-
-#define __get_user_nocheck(x, ptr, size) __do_get_user(0, x, ptr, size,
KERNEL_DS)
-#define __get_user_check(x, ptr, size, segment) __do_get_user(1, x,
ptr, size, segment)
-
-extern void __put_user_unknown (void);
-
-/*
- * Evaluating arguments X, PTR, SIZE, and SEGMENT may involve
subroutine-calls, which
- * could clobber r8 (among others). Thus, be careful not to evaluate them
while using r8.
- */
-#define __do_put_user(check, x, ptr, size, segment)
\
-({
\
- __typeof__ (x) __pu_x = (x);
\
- __typeof__ (*(ptr)) __user *__pu_ptr = (ptr);
\
- __typeof__ (size) __pu_size = (size);
\
- long __pu_err = -EFAULT;
\
-
\
- if (!check || __access_ok(__pu_ptr, __pu_size, segment))
\
- switch (__pu_size) {
\
- case 1: __put_user_size(__pu_x, __pu_ptr, 1, __pu_err);
break; \
- case 2: __put_user_size(__pu_x, __pu_ptr, 2, __pu_err);
break; \
- case 4: __put_user_size(__pu_x, __pu_ptr, 4, __pu_err);
break; \
- case 8: __put_user_size(__pu_x, __pu_ptr, 8, __pu_err);
break; \
- default: __put_user_unknown(); break;
\
- }
\
- __pu_err;
\
-})
-
-#define __put_user_nocheck(x, ptr, size) __do_put_user(0, x, ptr, size,
KERNEL_DS)
-#define __put_user_check(x, ptr, size, segment) __do_put_user(1, x,
ptr, size, segment)
-
-/*
- * Complex access routines
- */
-extern unsigned long __must_check __copy_user (void __user *to, const void
__user *from,
- unsigned long count);
-
-static inline unsigned long
-__copy_to_user (void __user *to, const void *from, unsigned long count)
-{
- return __copy_user(to, (void __user *) from, count);
-}
-
-static inline unsigned long
-__copy_from_user (void *to, const void __user *from, unsigned long count)
-{
- return __copy_user((void __user *) to, from, count);
-}
-
-#define __copy_to_user_inatomic __copy_to_user
-#define __copy_from_user_inatomic __copy_from_user
-#define copy_to_user(to, from, n)
\
-({
\
- void __user *__cu_to = (to);
\
- const void *__cu_from = (from);
\
- long __cu_len = (n);
\
-
\
- if (__access_ok(__cu_to, __cu_len, get_fs()))
\
- __cu_len = __copy_user(__cu_to, (void __user *) __cu_from,
__cu_len); \
- __cu_len;
\
-})
-
-#define copy_from_user(to, from, n)
\
-({
\
- void *__cu_to = (to);
\
- const void __user *__cu_from = (from);
\
- long __cu_len = (n);
\
-
\
- __chk_user_ptr(__cu_from);
\
- if (__access_ok(__cu_from, __cu_len, get_fs()))
\
- __cu_len = __copy_user((void __user *) __cu_to, __cu_from,
__cu_len); \
- __cu_len;
\
-})
-
-#define __copy_in_user(to, from, size) __copy_user((to), (from), (size))
-
-static inline unsigned long
-copy_in_user (void __user *to, const void __user *from, unsigned long n)
-{
- if (likely(access_ok(VERIFY_READ, from, n) && access_ok(VERIFY_WRITE,
to, n)))
- n = __copy_user(to, from, n);
- return n;
-}
-
-extern unsigned long __do_clear_user (void __user *, unsigned long);
-
-#define __clear_user(to, n) __do_clear_user(to, n)
-
-#define clear_user(to, n) \
-({ \
- unsigned long __cu_len = (n); \
- if (__access_ok(to, __cu_len, get_fs())) \
- __cu_len = __do_clear_user(to, __cu_len); \
- __cu_len; \
-})
-
-
-/*
- * Returns: -EFAULT if exception before terminator, N if the entire buffer
filled, else
- * strlen.
- */
-extern long __must_check __strncpy_from_user (char *to, const char __user
*from, long to_len);
-
-#define strncpy_from_user(to, from, n) \
-({ \
- const char __user * __sfu_from = (from); \
- long __sfu_ret = -EFAULT; \
- if (__access_ok(__sfu_from, 0, get_fs())) \
- __sfu_ret = __strncpy_from_user((to), __sfu_from, (n)); \
- __sfu_ret; \
-})
-
-/* Returns: 0 if bad, string length+1 (memory size) of string if ok */
-extern unsigned long __strlen_user (const char __user *);
-
-#define strlen_user(str) \
-({ \
- const char __user *__su_str = (str); \
- unsigned long __su_ret = 0; \
- if (__access_ok(__su_str, 0, get_fs())) \
- __su_ret = __strlen_user(__su_str); \
- __su_ret; \
-})
-
-/*
- * Returns: 0 if exception before NUL or reaching the supplied limit
- * (N), a value greater than N if the limit would be exceeded, else
- * strlen.
- */
-extern unsigned long __strnlen_user (const char __user *, long);
-
-#define strnlen_user(str, len) \
-({ \
- const char __user *__su_str = (str); \
- unsigned long __su_ret = 0; \
- if (__access_ok(__su_str, 0, get_fs())) \
- __su_ret = __strnlen_user(__su_str, len); \
- __su_ret; \
-})
-
-/* Generic code can't deal with the location-relative format that we use for
compactness. */
-#define ARCH_HAS_SORT_EXTABLE
-#define ARCH_HAS_SEARCH_EXTABLE
-
-struct exception_table_entry {
- int addr; /* location-relative address of insn this fixup is for
*/
- int cont; /* location-relative continuation addr.; if bit 2 is
set, r9 is set to 0 */
-};
-
-extern void ia64_handle_exception (struct pt_regs *regs, const struct
exception_table_entry *e);
-extern const struct exception_table_entry *search_exception_tables (unsigned
long addr);
-
-static inline int
-ia64_done_with_exception (struct pt_regs *regs)
-{
- const struct exception_table_entry *e;
- e = search_exception_tables(regs->cr_iip + ia64_psr(regs)->ri);
- if (e) {
- ia64_handle_exception(regs, e);
- return 1;
- }
- return 0;
-}
-
-#ifndef XEN
-#define ARCH_HAS_TRANSLATE_MEM_PTR 1
-static __inline__ char *
-xlate_dev_mem_ptr (unsigned long p)
-{
- struct page *page;
- char * ptr;
-
- page = mfn_to_page(p >> PAGE_SHIFT);
- if (PageUncached(page))
- ptr = (char *)p + __IA64_UNCACHED_OFFSET;
- else
- ptr = __va(p);
-
- return ptr;
-}
-
-/*
- * Convert a virtual cached kernel memory pointer to an uncached pointer
- */
-static __inline__ char *
-xlate_dev_kmem_ptr (char * p)
-{
- struct page *page;
- char * ptr;
-
- page = virt_to_page((unsigned long)p >> PAGE_SHIFT);
- if (PageUncached(page))
- ptr = (char *)__pa(p) + __IA64_UNCACHED_OFFSET;
- else
- ptr = p;
-
- return ptr;
-}
-#endif
-
-#endif /* _ASM_IA64_UACCESS_H */
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