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ntdll: Avoid copying and restoring the context in RtlCaptureContext for i386.

This commit is contained in:
Alexandre Julliard 2011-02-01 12:13:19 +01:00
parent f7385699a9
commit 43682ce114
2 changed files with 29 additions and 8 deletions
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2
dlls/ntdll/ntdll.spec
View File

@ -435,7 +435,7 @@
# @ stub RtlAssert2
@ stdcall RtlAssert(ptr ptr long long)
# @ stub RtlCancelTimer
@ stdcall -register RtlCaptureContext(ptr)
@ stdcall -norelay RtlCaptureContext(ptr)
@ stdcall RtlCaptureStackBackTrace(long long ptr ptr)
# @ stub RtlCaptureStackContext
@ stdcall RtlCharToInteger(ptr long ptr)

35
dlls/ntdll/signal_i386.c
View File

@ -1151,13 +1151,34 @@ static inline void restore_context( const CONTEXT *context, SIGCONTEXT *sigconte
/***********************************************************************
* RtlCaptureContext (NTDLL.@)
*/
void WINAPI __regs_RtlCaptureContext( CONTEXT *context, CONTEXT *regs )
{
*context = *regs;
if (fpux_support) save_fpux( context );
else save_fpu( context );
}
DEFINE_REGS_ENTRYPOINT( RtlCaptureContext, 1 )
__ASM_STDCALL_FUNC( RtlCaptureContext, 4,
"pushl %eax\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"movl 8(%esp),%eax\n\t" /* context */
"movl $0x10007,(%eax)\n\t" /* context->ContextFlags */
"movw %gs,0x8c(%eax)\n\t" /* context->SegGs */
"movw %fs,0x90(%eax)\n\t" /* context->SegFs */
"movw %es,0x94(%eax)\n\t" /* context->SegEs */
"movw %ds,0x98(%eax)\n\t" /* context->SegDs */
"movl %edi,0x9c(%eax)\n\t" /* context->Edi */
"movl %esi,0xa0(%eax)\n\t" /* context->Esi */
"movl %ebx,0xa4(%eax)\n\t" /* context->Ebx */
"movl %edx,0xa8(%eax)\n\t" /* context->Edx */
"movl %ecx,0xac(%eax)\n\t" /* context->Ecx */
"movl %ebp,0xb4(%eax)\n\t" /* context->Ebp */
"movl 4(%esp),%edx\n\t"
"movl %edx,0xb8(%eax)\n\t" /* context->Eip */
"movw %cs,0xbc(%eax)\n\t" /* context->SegCs */
"pushfl\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"popl 0xc0(%eax)\n\t" /* context->EFlags */
__ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
"leal 8(%esp),%edx\n\t"
"movl %edx,0xc4(%eax)\n\t" /* context->Esp */
"movw %ss,0xc8(%eax)\n\t" /* context->SegSs */
"popl 0xb0(%eax)\n\t" /* context->Eax */
__ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
"ret $4" )
/***********************************************************************