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kernel32: Unalign the stack on process startup to work around Doom3 bug.

This commit is contained in:
Alexandre Julliard 2010-05-28 11:20:28 +02:00
parent aa9c781703
commit a10e9ba092
1 changed files with 23 additions and 1 deletions
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24
dlls/kernel32/process.c
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@ -944,6 +944,28 @@ static void start_wineboot( HANDLE handles[2] )
}
#ifdef __i386__
extern DWORD call_process_entry( PEB *peb, LPTHREAD_START_ROUTINE entry );
__ASM_GLOBAL_FUNC( call_process_entry,
"pushl %ebp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
__ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
"movl %esp,%ebp\n\t"
__ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
"subl $12,%esp\n\t" /* deliberately mis-align the stack by 8, Doom 3 needs this */
"pushl 8(%ebp)\n\t"
"call *12(%ebp)\n\t"
"leave\n\t"
__ASM_CFI(".cfi_def_cfa %esp,4\n\t")
__ASM_CFI(".cfi_same_value %ebp\n\t")
"ret" )
#else
static inline DWORD call_process_entry( PEB *peb, LPTHREAD_START_ROUTINE entry )
{
return entry( peb );
}
#endif
/***********************************************************************
* start_process
*
@ -971,7 +993,7 @@ static DWORD WINAPI start_process( PEB *peb )
SetLastError( 0 ); /* clear error code */
if (peb->BeingDebugged) DbgBreakPoint();
return entry( peb );
return call_process_entry( peb, entry );
}