Sebastian Lackner : ntdll: Mimic Windows behaviour when calling debug service.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 218bc84e03eaa807caca58027334e9b173dcfa7e
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=218bc84e03eaa807caca58027334e9b173dcfa7e

Author: Sebastian Lackner <sebastian at fds-team.de>
Date:   Thu Feb 18 09:58:13 2016 +0100

ntdll: Mimic Windows behaviour when calling debug service.

Signed-off-by: Sebastian Lackner <sebastian at fds-team.de>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/ntdll/signal_i386.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c
index 10235fe..5708aae 100644
--- a/dlls/ntdll/signal_i386.c
+++ b/dlls/ntdll/signal_i386.c
@@ -1940,6 +1940,21 @@ static void WINAPI raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context
             goto done;
         }
         break;
+    case EXCEPTION_BREAKPOINT:
+        if (!is_wow64)
+        {
+            /* On Wow64, the upper DWORD of Rax contains garbage, and the debug
+             * service is usually not recognized when called from usermode. */
+            switch (rec->ExceptionInformation[0])
+            {
+                case 1: /* BREAKPOINT_PRINT */
+                case 3: /* BREAKPOINT_LOAD_SYMBOLS */
+                case 4: /* BREAKPOINT_UNLOAD_SYMBOLS */
+                case 5: /* BREAKPOINT_COMMAND_STRING (>= Win2003) */
+                    goto done;
+            }
+        }
+        break;
     }
     status = NtRaiseException( rec, context, TRUE );
     raise_status( status, rec );