Dan Kegel : user32: Add assembly wrapper for calling hook procedures.
Alexandre Julliard
julliard at winehq.org
Wed Apr 24 13:45:58 CDT 2013
Module: wine
Branch: master
Commit: c9d1a1906e9342a707a63d73b4afffcc0577ed11
URL: http://source.winehq.org/git/wine.git/?a=commit;h=c9d1a1906e9342a707a63d73b4afffcc0577ed11
Author: Dan Kegel <dank at kegel.com>
Date: Wed Apr 24 08:15:56 2013 -0700
user32: Add assembly wrapper for calling hook procedures.
---
dlls/user32/hook.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++----
1 files changed, 48 insertions(+), 4 deletions(-)
diff --git a/dlls/user32/hook.c b/dlls/user32/hook.c
index c9e9e20..633704b 100644
--- a/dlls/user32/hook.c
+++ b/dlls/user32/hook.c
@@ -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 );
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