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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] Fix 64-bit HVM guest debug via gdbserver:
# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 30ae67d6e5f000d5471377bb658b77bf74c76237
# Parent 4840c3da25219c1163dd65ce5847c414320fe03e
Fix 64-bit HVM guest debug via gdbserver:
1. gdb_regs for 64bit, and macros to transfer regisers between ptrace
registers to gdb registers
2. xc_ptrace code building for 64bit
3. Implementation of new map_domain_va for 64bit
4. gdbserver-xen build configuration fixes for 64bit
From: Nitin Kamble
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
diff -r 4840c3da2521 -r 30ae67d6e5f0
tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/configure.srv
--- a/tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/configure.srv
Sun Mar 26 10:45:35 2006
+++ b/tools/debugger/gdb/gdb-6.2.1-xen-sparse/gdb/gdbserver/configure.srv
Sun Mar 26 10:50:39 2006
@@ -61,7 +61,7 @@
srv_linux_thread_db=yes
;;
x86_64-*-linux*) srv_regobj=reg-x86-64.o
- srv_tgtobj="linux-low.o linux-x86-64-low.o i387-fp.o"
+ srv_tgtobj="linux-xen-low.o linux-x86-64-low.o
i387-fp.o"
srv_linux_regsets=yes
;;
xscale*-*-linux*) srv_regobj=reg-arm.o
diff -r 4840c3da2521 -r 30ae67d6e5f0 tools/libxc/Makefile
--- a/tools/libxc/Makefile Sun Mar 26 10:45:35 2006
+++ b/tools/libxc/Makefile Sun Mar 26 10:50:39 2006
@@ -21,13 +21,9 @@
SRCS += xc_sedf.c
SRCS += xc_tbuf.c
-ifeq ($(XEN_TARGET_ARCH),x86_32)
+ifeq ($(patsubst x86%,x86,$(XEN_TARGET_ARCH)),x86)
SRCS += xc_ptrace.c
SRCS += xc_ptrace_core.c
-SRCS += xc_pagetab.c
-endif
-
-ifeq ($(XEN_TARGET_ARCH),x86_64)
SRCS += xc_pagetab.c
endif
diff -r 4840c3da2521 -r 30ae67d6e5f0 tools/libxc/xc_ptrace.c
--- a/tools/libxc/xc_ptrace.c Sun Mar 26 10:45:35 2006
+++ b/tools/libxc/xc_ptrace.c Sun Mar 26 10:50:39 2006
@@ -38,9 +38,6 @@
};
#endif
-/* XXX application state */
-static long nr_pages = 0;
-static unsigned long *page_array = NULL;
static int current_domid = -1;
static int current_isfile;
@@ -196,6 +193,60 @@
return (void *)((unsigned long)v | (va & (PAGE_SIZE - 1)));
}
+#ifdef __x86_64__
+static void *
+map_domain_va(
+ int xc_handle,
+ int cpu,
+ void *guest_va,
+ int perm)
+{
+ unsigned long l3p, l2p, l1p, p, va = (unsigned long)guest_va;
+ uint64_t *l4, *l3, *l2, *l1;
+ static void *v;
+
+ if ((ctxt[cpu].ctrlreg[4] & 0x20) == 0 ) /* legacy ia32 mode */
+ return map_domain_va_pae(xc_handle, cpu, guest_va, perm);
+
+ if (fetch_regs(xc_handle, cpu, NULL))
+ return NULL;
+
+ l4 = xc_map_foreign_range(
+ xc_handle, current_domid, PAGE_SIZE, PROT_READ, ctxt[cpu].ctrlreg[3]
>> PAGE_SHIFT);
+ if ( l4 == NULL )
+ return NULL;
+
+ l3p = l4[l4_table_offset(va)] >> PAGE_SHIFT;
+ l3 = xc_map_foreign_range(xc_handle, current_domid, PAGE_SIZE, PROT_READ,
l3p);
+ if ( l3 == NULL )
+ return NULL;
+
+ l2p = l3[l3_table_offset(va)] >> PAGE_SHIFT;
+ l2 = xc_map_foreign_range(xc_handle, current_domid, PAGE_SIZE, PROT_READ,
l2p);
+ if ( l2 == NULL )
+ return NULL;
+
+ l1p = l2[l2_table_offset(va)] >> PAGE_SHIFT;
+ l1 = xc_map_foreign_range(xc_handle, current_domid, PAGE_SIZE, perm, l1p);
+ if ( l1 == NULL )
+ return NULL;
+
+ p = l1[l1_table_offset(va)] >> PAGE_SHIFT;
+ if ( v != NULL )
+ munmap(v, PAGE_SIZE);
+ v = xc_map_foreign_range(xc_handle, current_domid, PAGE_SIZE, perm, p);
+ if ( v == NULL )
+ return NULL;
+
+ return (void *)((unsigned long)v | (va & (PAGE_SIZE - 1)));
+}
+#endif
+
+#ifdef __i386__
+/* XXX application state */
+static long nr_pages = 0;
+static unsigned long *page_array = NULL;
+
static void *
map_domain_va(
int xc_handle,
@@ -216,15 +267,18 @@
static unsigned long page_phys[MAX_VIRT_CPUS];
static unsigned long *page_virt[MAX_VIRT_CPUS];
static int prev_perm[MAX_VIRT_CPUS];
- static enum { MODE_UNKNOWN, MODE_32, MODE_PAE } mode;
+ static enum { MODE_UNKNOWN, MODE_32, MODE_PAE, MODE_64 } mode;
if ( mode == MODE_UNKNOWN )
{
xen_capabilities_info_t caps;
(void)xc_version(xc_handle, XENVER_capabilities, caps);
- mode = MODE_32;
- if ( strstr(caps, "_x86_32p") )
+ if ( strstr(caps, "-x86_64") )
+ mode = MODE_64;
+ else if ( strstr(caps, "-x86_32p") )
mode = MODE_PAE;
+ else if ( strstr(caps, "-x86_32") )
+ mode = MODE_32;
}
if ( mode == MODE_PAE )
@@ -303,6 +357,8 @@
return (void *)(((unsigned long)page_virt[cpu]) | (va & BSD_PAGE_MASK));
}
+
+#endif
static int
__xc_waitdomain(
diff -r 4840c3da2521 -r 30ae67d6e5f0 tools/libxc/xc_ptrace.h
--- a/tools/libxc/xc_ptrace.h Sun Mar 26 10:45:35 2006
+++ b/tools/libxc/xc_ptrace.h Sun Mar 26 10:50:39 2006
@@ -9,6 +9,96 @@
#define BSD_PAGE_MASK (PAGE_SIZE-1)
#define PDRSHIFT 22
#define PSL_T 0x00000100 /* trace enable bit */
+
+#ifdef __x86_64__
+struct gdb_regs
+{
+ unsigned long r15;
+ unsigned long r14;
+ unsigned long r13;
+ unsigned long r12;
+ unsigned long rbp;
+ unsigned long rbx;
+ unsigned long r11;
+ unsigned long r10;
+ unsigned long r9;
+ unsigned long r8;
+ unsigned long rax;
+ unsigned long rcx;
+ unsigned long rdx;
+ unsigned long rsi;
+ unsigned long rdi;
+ unsigned long orig_rax;
+ unsigned long rip;
+ unsigned long xcs;
+ unsigned long eflags;
+ unsigned long rsp;
+ unsigned long xss;
+ unsigned long fs_base;
+ unsigned long gs_base;
+ unsigned long xds;
+ unsigned long xes;
+ unsigned long xfs;
+ unsigned long xgs;
+};
+
+#define SET_PT_REGS(pt, xc) \
+{ \
+ pt.r8 = xc.r8; \
+ pt.r9 = xc.r9; \
+ pt.r10 = xc.r10; \
+ pt.r11 = xc.r11; \
+ pt.r12 = xc.r12; \
+ pt.r13 = xc.r13; \
+ pt.r14 = xc.r14; \
+ pt.r15 = xc.r15; \
+ pt.rbx = xc.rbx; \
+ pt.rcx = xc.rcx; \
+ pt.rdx = xc.rdx; \
+ pt.rsi = xc.rsi; \
+ pt.rdi = xc.rdi; \
+ pt.rbp = xc.rbp; \
+ pt.rax = xc.rax; \
+ pt.rip = xc.rip; \
+ pt.xcs = xc.cs; \
+ pt.eflags = xc.eflags; \
+ pt.rsp = xc.rsp; \
+ pt.xss = xc.ss; \
+ pt.xes = xc.es; \
+ pt.xds = xc.ds; \
+ pt.xfs = xc.fs; \
+ pt.xgs = xc.gs; \
+}
+
+#define SET_XC_REGS(pt, xc) \
+{ \
+ xc.r8 = pt->r8; \
+ xc.r9 = pt->r9; \
+ xc.r10 = pt->r10; \
+ xc.r11 = pt->r11; \
+ xc.r12 = pt->r12; \
+ xc.r13 = pt->r13; \
+ xc.r14 = pt->r14; \
+ xc.r15 = pt->r15; \
+ xc.rbx = pt->rbx; \
+ xc.rcx = pt->rcx; \
+ xc.rdx = pt->rdx; \
+ xc.rsi = pt->rsi; \
+ xc.rdi = pt->rdi; \
+ xc.rbp = pt->rbp; \
+ xc.rax = pt->rax; \
+ xc.rip = pt->rip; \
+ xc.cs = pt->xcs; \
+ xc.eflags = pt->eflags; \
+ xc.rsp = pt->rsp; \
+ xc.ss = pt->xss; \
+ xc.es = pt->xes; \
+ xc.ds = pt->xds; \
+ xc.fs = pt->xfs; \
+ xc.gs = pt->xgs; \
+}
+
+#elif __i386__
struct gdb_regs {
long ebx; /* 0 */
@@ -30,8 +120,6 @@
int xss; /* 64 */
};
-
-#define printval(x) printf("%s = %lx\n", #x, (long)x);
#define SET_PT_REGS(pt, xc) \
{ \
pt.ebx = xc.ebx; \
@@ -71,7 +159,9 @@
xc.fs = pt->xfs; \
xc.gs = pt->xgs; \
}
+#endif
+#define printval(x) printf("%s = %lx\n", #x, (long)x);
#define vtopdi(va) ((va) >> PDRSHIFT)
#define vtopti(va) (((va) >> PAGE_SHIFT) & 0x3ff)
#endif
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