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user32: Add assembly wrapper for calling hook procedures.

This commit is contained in:
Dan Kegel 2013-04-24 08:15:56 -07:00 committed by Alexandre Julliard
parent c371af0d5c
commit c9d1a1906e
1 changed files with 48 additions and 4 deletions
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52
dlls/user32/hook.c
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@ -202,6 +202,48 @@ static HHOOK set_windows_hook( INT id, HOOKPROC proc, HINSTANCE inst, DWORD tid,
return handle;
}
#ifdef __i386__
/* Some apps pass a non-stdcall proc to SetWindowsHookExA,
* so we need a small assembly wrapper to call the proc.
*/
extern LRESULT HOOKPROC_wrapper( HOOKPROC proc,
INT code, WPARAM wParam, LPARAM lParam );
__ASM_GLOBAL_FUNC( HOOKPROC_wrapper,
"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")
"pushl %edi\n\t"
__ASM_CFI(".cfi_rel_offset %edi,-4\n\t")
"pushl %esi\n\t"
__ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
"pushl %ebx\n\t"
__ASM_CFI(".cfi_rel_offset %ebx,-12\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"
__ASM_CFI(".cfi_same_value %ebx\n\t")
"popl %esi\n\t"
__ASM_CFI(".cfi_same_value %esi\n\t")
"popl %edi\n\t"
__ASM_CFI(".cfi_same_value %edi\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 LRESULT HOOKPROC_wrapper( HOOKPROC proc,
INT code, WPARAM wParam, LPARAM lParam )
{
return proc( code, wParam, lParam );
}
#endif /* __i386__ */
/***********************************************************************
* call_hook_AtoW
@ -210,7 +252,8 @@ static LRESULT call_hook_AtoW( HOOKPROC proc, INT id, INT code, WPARAM wparam, L
{
LRESULT ret;
UNICODE_STRING usBuffer;
if (id != WH_CBT || code != HCBT_CREATEWND) ret = proc( code, wparam, lparam );
if (id != WH_CBT || code != HCBT_CREATEWND)
ret = HOOKPROC_wrapper( proc, code, wparam, lparam );
else
{
CBT_CREATEWNDA *cbtcwA = (CBT_CREATEWNDA *)lparam;
@ -233,7 +276,7 @@ static LRESULT call_hook_AtoW( HOOKPROC proc, INT id, INT code, WPARAM wparam, L
RtlCreateUnicodeStringFromAsciiz(&usBuffer,cbtcwA->lpcs->lpszClass);
csW.lpszClass = classW = usBuffer.Buffer;
}
ret = proc( code, wparam, (LPARAM)&cbtcwW );
ret = HOOKPROC_wrapper( proc, code, wparam, (LPARAM)&cbtcwW );
cbtcwA->hwndInsertAfter = cbtcwW.hwndInsertAfter;
HeapFree( GetProcessHeap(), 0, nameW );
HeapFree( GetProcessHeap(), 0, classW );
@ -249,7 +292,8 @@ static LRESULT call_hook_WtoA( HOOKPROC proc, INT id, INT code, WPARAM wparam, L
{
LRESULT ret;
if (id != WH_CBT || code != HCBT_CREATEWND) ret = proc( code, wparam, lparam );
if (id != WH_CBT || code != HCBT_CREATEWND)
ret = HOOKPROC_wrapper( proc, code, wparam, lparam );
else
{
CBT_CREATEWNDW *cbtcwW = (CBT_CREATEWNDW *)lparam;
@ -277,7 +321,7 @@ static LRESULT call_hook_WtoA( HOOKPROC proc, INT id, INT code, WPARAM wparam, L
csA.lpszClass = classA;
}
ret = proc( code, wparam, (LPARAM)&cbtcwA );
ret = HOOKPROC_wrapper( proc, code, wparam, (LPARAM)&cbtcwA );
cbtcwW->hwndInsertAfter = cbtcwA.hwndInsertAfter;
HeapFree( GetProcessHeap(), 0, nameA );
HeapFree( GetProcessHeap(), 0, classA );