ntdll: Do not override existing context's EAX when dispatching user APC.

Fixes a regression introduced by 175a3649, which caused Winamp's in_wave module to crash when playing a wav file (the previous behavior only changed EAX when there was no context). Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

ntdll: Do not override existing context's EAX when dispatching user APC.
775dac02 · Gabriel Ivăncescu · Alexandre Julliard · f72f1ff9 · 775dac02
Commit 775dac02 authored Jan 08, 2021 by Gabriel Ivăncescu Committed by Alexandre Julliard Jan 08, 2021
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signal_i386.c dlls/ntdll/unix/signal_i386.c +1 -1

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--- a/dlls/ntdll/unix/signal_i386.c
+++ b/dlls/ntdll/unix/signal_i386.c
@@ -1696,6 +1696,7 @@ struct apc_stack_layout * WINAPI setup_user_apc_dispatcher_stack( CONTEXT *conte
    {
        c.ContextFlags = CONTEXT_FULL;
        NtGetContextThread( GetCurrentThread(), &c );
+        c.Eax = STATUS_USER_APC;
        context = &c;
    }
    memmove( &stack->context, context, sizeof(stack->context) );
@@ -1704,7 +1705,6 @@ struct apc_stack_layout * WINAPI setup_user_apc_dispatcher_stack( CONTEXT *conte
    stack->arg1 = arg1;
    stack->arg2 = arg2;
    stack->func = func;
-    stack->context.Eax = STATUS_USER_APC;
    return stack;
 }