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ntdll: Reimplemented _chkstk and _alloca_probe directly in assembly.

This commit is contained in:
Alexandre Julliard 2005-12-15 10:48:12 +01:00
parent b48d9590a3
commit 50bbfb3c8c
2 changed files with 16 additions and 12 deletions
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4
dlls/ntdll/ntdll.spec
View File

@ -1233,7 +1233,7 @@
@ stdcall -ret64 _alldiv(double double)
# @ stub _alldvrm
@ stdcall -ret64 _allmul(double double)
@ stdcall -i386 _alloca_probe()
@ stdcall -i386 -norelay _alloca_probe()
@ stdcall -ret64 _allrem(double double)
# @ stub _allshl
# @ stub _allshr
@ -1242,7 +1242,7 @@
# @ stub _aulldvrm
@ stdcall -ret64 _aullrem(double double)
# @ stub _aullshr
@ stdcall -i386 _chkstk()
@ stdcall -i386 -norelay _chkstk()
@ stub _fltused
@ cdecl -ret64 _ftol() NTDLL__ftol
@ cdecl _i64toa(double ptr long)

24
dlls/ntdll/rtl.c
View File

@ -391,11 +391,13 @@ DWORD WINAPI RtlDeleteSecurityObject(DWORD x1) {
* Glorified "enter xxxx".
*/
#ifdef __i386__
void WINAPI __regs__chkstk( CONTEXT86 *context )
{
context->Esp -= context->Eax;
}
DEFINE_REGS_ENTRYPOINT( _chkstk, 0, 0 );
__ASM_GLOBAL_FUNC( _chkstk,
"negl %eax\n\t"
"addl %esp,%eax\n\t"
"xchgl %esp,%eax\n\t"
"movl 0(%eax),%eax\n\t" /* copy return address from old location */
"movl %eax,0(%esp)\n\t"
"ret" );
#endif
/**************************************************************************
@ -404,11 +406,13 @@ DEFINE_REGS_ENTRYPOINT( _chkstk, 0, 0 );
* Glorified "enter xxxx".
*/
#ifdef __i386__
void WINAPI __regs__alloca_probe( CONTEXT86 *context )
{
context->Esp -= context->Eax;
}
DEFINE_REGS_ENTRYPOINT( _alloca_probe, 0, 0 );
__ASM_GLOBAL_FUNC( _alloca_probe,
"negl %eax\n\t"
"addl %esp,%eax\n\t"
"xchgl %esp,%eax\n\t"
"movl 0(%eax),%eax\n\t" /* copy return address from old location */
"movl %eax,0(%esp)\n\t"
"ret" );
#endif