From 0839ea104ac13fcefec44c26e5b4e80cd0bb7cd3 Mon Sep 17 00:00:00 2001
From: Alexandre Julliard <julliard@winehq.org>
Date: Thu, 7 Sep 2006 18:08:46 +0200
Subject: [PATCH] ntdll: Added sysctl to make the signal stack per-thread on
 MacOS.

---
 dlls/ntdll/signal_i386.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c
index dbd6bfeeb02..72144bdaeb1 100644
--- a/dlls/ntdll/signal_i386.c
+++ b/dlls/ntdll/signal_i386.c
@@ -51,6 +51,9 @@
 #ifdef HAVE_SYS_SIGNAL_H
 # include <sys/signal.h>
 #endif
+#ifdef HAVE_SYS_SYSCTL_H
+# include <sys/sysctl.h>
+#endif
 
 #include "windef.h"
 #include "thread.h"
@@ -1301,6 +1304,15 @@ BOOL SIGNAL_Init(void)
 
 #ifdef HAVE_SIGALTSTACK
     struct sigaltstack ss;
+
+#ifdef __APPLE__
+    int mib[2], val = 1;
+
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_THALTSTACK;
+    sysctl( mib, 2, NULL, NULL, &val, sizeof(val) );
+#endif
+
     ss.ss_sp    = get_signal_stack();
     ss.ss_size  = signal_stack_size;
     ss.ss_flags = 0;