[PATCH 2/2] ntdll: Initialize xstate in call_init_thunk() on x86.

[Paul Gofman]

Signed-off-by: Paul Gofman <pgofman at codeweavers.com>
---
    Other thread may be setting xstate during initial suspend.

 dlls/ntdll/unix/signal_i386.c   | 5 +++++
 dlls/ntdll/unix/signal_x86_64.c | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/dlls/ntdll/unix/signal_i386.c b/dlls/ntdll/unix/signal_i386.c
index 16483d8e341..f206d3c8579 100644
--- a/dlls/ntdll/unix/signal_i386.c
+++ b/dlls/ntdll/unix/signal_i386.c
@@ -2364,8 +2364,13 @@ void DECLSPEC_HIDDEN call_init_thunk( LPTHREAD_START_ROUTINE entry, void *arg, B
     struct x86_thread_data *thread_data = (struct x86_thread_data *)&teb->GdiTebBatch;
     struct syscall_frame *frame = thread_data->syscall_frame;
     CONTEXT *ctx, context = { CONTEXT_ALL };
+    DECLSPEC_ALIGN(64) XSTATE xs;
     DWORD *stack;
 
+    context_init_xstate( &context, &xs );
+    xs.Mask = 0;
+    xs.CompactionMask = xstate_compaction_enabled ? 0x8000000000000000 : 0;
+
     context.SegCs  = get_cs();
     context.SegDs  = get_ds();
     context.SegEs  = get_ds();
diff --git a/dlls/ntdll/unix/signal_x86_64.c b/dlls/ntdll/unix/signal_x86_64.c
index 04e5c3b2982..04c94945649 100644
--- a/dlls/ntdll/unix/signal_x86_64.c
+++ b/dlls/ntdll/unix/signal_x86_64.c
@@ -2998,9 +2998,13 @@ void DECLSPEC_HIDDEN call_init_thunk( LPTHREAD_START_ROUTINE entry, void *arg, B
     struct amd64_thread_data *thread_data = (struct amd64_thread_data *)&teb->GdiTebBatch;
     struct syscall_frame *frame = thread_data->syscall_frame;
     CONTEXT *ctx, context = { 0 };
+    DECLSPEC_ALIGN(64) XSTATE xs;
     I386_CONTEXT *wow_context;
 
     context.ContextFlags = CONTEXT_ALL;
+    context_init_xstate( &context, &xs );
+    xs.Mask = 0;
+    xs.CompactionMask = xstate_compaction_enabled ? 0x8000000000000000 : 0;
     context.Rcx    = (ULONG_PTR)entry;
     context.Rdx    = (ULONG_PTR)arg;
     context.Rsp    = (ULONG_PTR)teb->Tib.StackBase - 0x28;
-- 
2.33.1