user32: Set %ecx to address of rect in EnumDisplayMonitors callback.

Signed-off-by: Sebastian Lackner <sebastian@fds-team.de> Signed-off-by: Alexandre Julliard <julliard@winehq.org> (cherry picked from commit 11f6df13) Signed-off-by: Michael Stefaniuc <mstefani@winehq.org>

user32: Set %ecx to address of rect in EnumDisplayMonitors callback.
f7c6a288 · Sebastian Lackner · Michael Stefaniuc · fc9e0a26 · f7c6a288
Commit f7c6a288 authored Mar 31, 2016 by Sebastian Lackner Committed by Michael Stefaniuc May 02, 2016
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misc.c dlls/user32/misc.c +2 -0

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--- a/dlls/user32/misc.c
+++ b/dlls/user32/misc.c
@@ -471,6 +471,7 @@ BOOL WINAPI GetMonitorInfoW(HMONITOR hMonitor, LPMONITORINFO lpMonitorInfo)
 #ifdef __i386__
 /* Some apps pass a non-stdcall callback to EnumDisplayMonitors,
 * so we need a small assembly wrapper to call it.
+ * MJ's Help Diagnostic expects that %ecx contains the address to the rect.
 */
 struct enumdisplaymonitors_lparam
 {
@@ -491,6 +492,7 @@ __ASM_STDCALL_FUNC( enumdisplaymonitors_callback_wrapper, 16,
    "pushl 16(%ebp)\n\t"
    "pushl 12(%ebp)\n\t"
    "pushl 8(%ebp)\n\t"
+    "movl 16(%ebp),%ecx\n\t"
    "call *(%eax)\n\t"          /* call orig->proc */
    "leave\n\t"
    __ASM_CFI(".cfi_def_cfa %esp,4\n\t")