Brendan Shanks : ntdll: Add a WARN when setting debug registers fails under Rosetta.

[Alexandre Julliard]

Module: wine
Branch: stable
Commit: eb52b68270cd6fde3150e4b0c3a272ec1b638eb4
URL:    https://gitlab.winehq.org/wine/wine/-/commit/eb52b68270cd6fde3150e4b0c3a272e...

Author: Brendan Shanks <bshanks(a)codeweavers.com>
Date:   Thu Feb 16 21:58:26 2023 -0800

ntdll: Add a WARN when setting debug registers fails under Rosetta.

(cherry picked from commit 39655dade3c802557754439451279c5b59b31ce8)

---

 dlls/ntdll/unix/signal_x86_64.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dlls/ntdll/unix/signal_x86_64.c b/dlls/ntdll/unix/signal_x86_64.c
index 94d79b9cdd1..391f244cbb2 100644
--- a/dlls/ntdll/unix/signal_x86_64.c
+++ b/dlls/ntdll/unix/signal_x86_64.c
@@ -1001,6 +1001,10 @@ NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
     if (!self)
     {
         ret = set_thread_context( handle, context, &self, IMAGE_FILE_MACHINE_AMD64 );
+#ifdef __APPLE__
+        if ((flags & CONTEXT_DEBUG_REGISTERS) && (ret == STATUS_UNSUCCESSFUL))
+            WARN_(seh)( "Setting debug registers is not supported under Rosetta\n" );
+#endif
         if (ret || !self) return ret;
         if (flags & CONTEXT_DEBUG_REGISTERS)
         {