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Added assembly wrapper for calling window procedures.

This commit is contained in:
Alexandre Julliard 2000-07-16 20:29:44 +00:00
parent a3e0cfc5fb
commit d51ee843c5
1 changed files with 44 additions and 10 deletions
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36
windows/winproc.c
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@ -118,6 +118,38 @@ BOOL WINPROC_Init(void)
}
#ifdef __i386__
/* Some window procedures modify register they shouldn't, or are not
* properly declared stdcall; so we need a small assembly wrapper to
* call them. */
extern LRESULT WINPROC_wrapper( WNDPROC proc, HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam );
__ASM_GLOBAL_FUNC( WINPROC_wrapper,
"pushl %ebp\n\t"
"movl %esp,%ebp\n\t"
"pushl %edi\n\t"
"pushl %esi\n\t"
"pushl %ebx\n\t"
"pushl 24(%ebp)\n\t"
"pushl 20(%ebp)\n\t"
"pushl 16(%ebp)\n\t"
"pushl 12(%ebp)\n\t"
"movl 8(%ebp),%eax\n\t"
"call *%eax\n\t"
"leal -12(%ebp),%esp\n\t"
"popl %ebx\n\t"
"popl %esi\n\t"
"popl %edi\n\t"
"leave\n\t"
"ret" );
#else
static inline LRESULT WINPROC_wrapper( WNDPROC proc, HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam )
{
return proc( hwnd, msg, wParam, lParam );
}
#endif /* __i386__ */
/**********************************************************************
* WINPROC_CallWndProc32
*
@ -134,8 +166,10 @@ static LRESULT WINPROC_CallWndProc( WNDPROC proc, HWND hwnd, UINT msg,
/* To avoid any deadlocks, all the locks on the windows structures
must be suspended before the control is passed to the application */
iWndsLocks = WIN_SuspendWndsLock();
retvalue = proc( hwnd, msg, wParam, lParam );
retvalue = WINPROC_wrapper( proc, hwnd, msg, wParam, lParam );
WIN_RestoreWndsLock(iWndsLocks);
TRACE_(relay)("(wndproc=%p,hwnd=%08x,msg=%s,wp=%08x,lp=%08lx) ret=%08lx\n",
proc, hwnd, SPY_GetMsgName(msg), wParam, lParam, retvalue );
return retvalue;
}