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dbghelp: On x86-64 CPUs, add capability to interpret properly the epilog part.

This commit is contained in:
Eric Pouech 2012-01-22 13:00:06 +01:00 committed by Alexandre Julliard
parent e40430cd16
commit 2ed88d7ac2
1 changed files with 77 additions and 2 deletions
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79
dlls/dbghelp/cpu_x86_64.c
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@ -349,6 +349,82 @@ static BOOL is_inside_epilog(struct cpu_stack_walk* csw, DWORD64 pc)
} }
} }
static BOOL interpret_epilog(struct cpu_stack_walk* csw, ULONG64 pc, CONTEXT *context )
{
BYTE insn, val8;
WORD val16;
LONG val32;
DWORD64 val64;
for (;;)
{
BYTE rex = 0;
if (!sw_read_mem(csw, pc, &insn, 1)) return FALSE;
if ((insn & 0xf0) == 0x40)
{
rex = insn & 0x0f; /* rex prefix */
if (!sw_read_mem(csw, ++pc, &insn, 1)) return FALSE;
}
switch (insn)
{
case 0x58: /* pop %rax/r8 */
case 0x59: /* pop %rcx/r9 */
case 0x5a: /* pop %rdx/r10 */
case 0x5b: /* pop %rbx/r11 */
case 0x5c: /* pop %rsp/r12 */
case 0x5d: /* pop %rbp/r13 */
case 0x5e: /* pop %rsi/r14 */
case 0x5f: /* pop %rdi/r15 */
if (!sw_read_mem(csw, context->Rsp, &val64, sizeof(DWORD64))) return FALSE;
set_int_reg(context, insn - 0x58 + (rex & 1) * 8, val64);
context->Rsp += sizeof(ULONG64);
pc++;
continue;
case 0x81: /* add $nnnn,%rsp */
if (!sw_read_mem(csw, pc + 2, &val32, sizeof(ULONG))) return FALSE;
context->Rsp += (LONG)val32;
pc += 2 + sizeof(LONG);
continue;
case 0x83: /* add $n,%rsp */
if (!sw_read_mem(csw, pc + 2, &val8, sizeof(BYTE))) return FALSE;
context->Rsp += (signed char)val8;
pc += 3;
continue;
case 0x8d:
if (!sw_read_mem(csw, pc + 1, &insn, sizeof(BYTE))) return FALSE;
if ((insn >> 6) == 1) /* lea n(reg),%rsp */
{
if (!sw_read_mem(csw, pc + 2, &val8, sizeof(BYTE))) return FALSE;
context->Rsp = get_int_reg( context, (insn & 7) + (rex & 1) * 8 ) + (signed char)val8;
pc += 3;
}
else /* lea nnnn(reg),%rsp */
{
if (!sw_read_mem(csw, pc + 2, &val32, sizeof(ULONG))) return FALSE;
context->Rsp = get_int_reg( context, (insn & 7) + (rex & 1) * 8 ) + (LONG)val32;
pc += 2 + sizeof(LONG);
}
continue;
case 0xc2: /* ret $nn */
if (!sw_read_mem(csw, context->Rsp, &val64, sizeof(DWORD64))) return FALSE;
if (!sw_read_mem(csw, pc + 1, &val16, sizeof(WORD))) return FALSE;
context->Rip = val64;
context->Rsp += sizeof(ULONG64) + val16;
return TRUE;
case 0xc3: /* ret */
if (!sw_read_mem(csw, context->Rsp, &val64, sizeof(DWORD64))) return FALSE;
context->Rip = val64;
context->Rsp += sizeof(ULONG64);
return TRUE;
/* FIXME: add various jump instructions */
}
FIXME("unsupported insn %x\n", insn);
return FALSE;
}
}
static BOOL default_unwind(struct cpu_stack_walk* csw, CONTEXT* context) static BOOL default_unwind(struct cpu_stack_walk* csw, CONTEXT* context)
{ {
if (!sw_read_mem(csw, context->Rsp, &context->Rip, sizeof(DWORD64))) if (!sw_read_mem(csw, context->Rsp, &context->Rip, sizeof(DWORD64)))
@ -404,8 +480,7 @@ static BOOL interpret_function_table_entry(struct cpu_stack_walk* csw,
prolog_offset = ~0; prolog_offset = ~0;
if (is_inside_epilog(csw, context->Rip)) if (is_inside_epilog(csw, context->Rip))
{ {
FIXME("epilog management not fully done\n"); interpret_epilog(csw, context->Rip, context);
/* interpret_epilog((const BYTE*)frame->AddrPC.Offset, context); */
return TRUE; return TRUE;
} }
} }