Alexandre Julliard : wow64: Fixup Eip for breakpoint exceptions.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ce737601d54f42123c3cd56c2f923d7fe50756c5
URL:    https://gitlab.winehq.org/wine/wine/-/commit/ce737601d54f42123c3cd56c2f923d7...

Author: Alexandre Julliard <julliard(a)winehq.org>
Date:   Thu Mar  9 17:26:24 2023 +0100

wow64: Fixup Eip for breakpoint exceptions.

Matching the 32-bit setup_raise_exception().

---

 dlls/wow64/syscall.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dlls/wow64/syscall.c b/dlls/wow64/syscall.c
index 17cfe337532..69f2f6c50a5 100644
--- a/dlls/wow64/syscall.c
+++ b/dlls/wow64/syscall.c
@@ -215,6 +215,9 @@ static void call_user_exception_dispatcher( EXCEPTION_RECORD32 *rec, void *ctx32
             context = RtlLocateLegacyContext( context_ex, NULL );
             *context = ctx;
             context->ContextFlags = flags;
+            /* adjust Eip for breakpoints in software emulation (hardware exceptions already adjust Rip) */
+            if (rec->ExceptionCode == EXCEPTION_BREAKPOINT && (wow64info->CpuFlags & WOW64_CPUFLAGS_SOFTWARE))
+                context->Eip--;
             stack->context_ptr = PtrToUlong( context );
 
             if (src_ex)