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xaudio2_7: Also preserve %ebx in call_on_voice_processing_pass_start(). 

It is tested that EBX register is not preserved by
IXAudio2VoiceCallback_OnVoiceProcessingPassStart callback
in League of Legends. It doesn't lead to crash in the
present xaudio, while it might still be a potential issue.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=46870
Signed-off-by: Paul Gofman <gofmanp@gmail.com>
Signed-off-by: Andrew Eikum <aeikum@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Paul Gofman 2019-04-11 11:30:50 +03:00 committed by Alexandre Julliard
parent 7ca60b90ef
commit a5b22c86b4
1 changed files with 8 additions and 3 deletions
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11
dlls/xaudio2_7/xaudio_dll.c
View File

@ -41,7 +41,8 @@
WINE_DEFAULT_DEBUG_CHANNEL(xaudio2);
#if XAUDIO2_VER != 0 && defined(__i386__)
/* EVE Online uses an OnVoiceProcessingPassStart callback which corrupts %esi. */
/* EVE Online uses an OnVoiceProcessingPassStart callback which corrupts %esi;
* League of Legends uses a callback which corrupts %ebx. */
#define IXAudio2VoiceCallback_OnVoiceProcessingPassStart(a, b) call_on_voice_processing_pass_start(a, b)
extern void call_on_voice_processing_pass_start(IXAudio2VoiceCallback *This, UINT32 BytesRequired);
__ASM_GLOBAL_FUNC( call_on_voice_processing_pass_start,
@ -54,13 +55,17 @@ __ASM_GLOBAL_FUNC( call_on_voice_processing_pass_start,
__ASM_CFI(".cfi_rel_offset %esi,-4\n\t")
"pushl %edi\n\t"
__ASM_CFI(".cfi_rel_offset %edi,-8\n\t")
"subl $8,%esp\n\t"
"pushl %ebx\n\t"
__ASM_CFI(".cfi_rel_offset %ebx,-12\n\t")
"subl $4,%esp\n\t"
"pushl 12(%ebp)\n\t" /* BytesRequired */
"pushl 8(%ebp)\n\t" /* This */
"movl 8(%ebp),%eax\n\t"
"movl 0(%eax),%eax\n\t"
"call *0(%eax)\n\t" /* This->lpVtbl->OnVoiceProcessingPassStart */
"leal -8(%ebp),%esp\n\t"
"leal -12(%ebp),%esp\n\t"
"popl %ebx\n\t"
__ASM_CFI(".cfi_same_value %ebx\n\t")
"popl %edi\n\t"
__ASM_CFI(".cfi_same_value %edi\n\t")
"popl %esi\n\t"