From f38983f3d3c196ebaf1a6703c18fe6eb8ceea6d3 Mon Sep 17 00:00:00 2001
From: Glenn Maynard <gmaynard@users.sourceforge.net>
Date: Fri, 16 Apr 2004 07:03:14 +0000
Subject: [PATCH] implement GetSignalBacktraceContext on DARWIN

---
 stepmania/src/archutils/Unix/Backtrace.cpp | 6 ++++++
 stepmania/src/archutils/Unix/Backtrace.h   | 2 --
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/stepmania/src/archutils/Unix/Backtrace.cpp b/stepmania/src/archutils/Unix/Backtrace.cpp
index 5359465f35..40d6987af1 100644
--- a/stepmania/src/archutils/Unix/Backtrace.cpp
+++ b/stepmania/src/archutils/Unix/Backtrace.cpp
@@ -413,6 +413,12 @@ void GetExceptionBacktraceContext( BacktraceContext *ctx, const ExceptionInforma
 	ctx->FramePtr = (void *) exception->registerImage->R1.lo;
 }
 
+void GetSignalBacktraceContext( BacktraceContext *ctx, const ucontext_t *uc )
+{
+	ctx->PC = (void *) uc->uc_mcontext->ss.srr0;
+	ctx->FramePtr = (void *) uc->uc_mcontext->ss.r1;
+}
+
 void InitializeBacktrace() { }
 
 void GetBacktrace( const void **buf, size_t size, const BacktraceContext *ctx )
diff --git a/stepmania/src/archutils/Unix/Backtrace.h b/stepmania/src/archutils/Unix/Backtrace.h
index 8a833a12eb..1be6e6a163 100644
--- a/stepmania/src/archutils/Unix/Backtrace.h
+++ b/stepmania/src/archutils/Unix/Backtrace.h
@@ -33,10 +33,8 @@ bool GetThreadBacktraceContext( int ThreadID, BacktraceContext *ctx );
 
 /* Set up a BacktraceContext to get a backtrace after receiving a signal, given
  * a ucontext_t (see sigaction(2)).  (This interface is UNIX-specific.) */
-#if !defined(DARWIN)
 #include <ucontext.h>
 void GetSignalBacktraceContext( BacktraceContext *ctx, const ucontext_t *uc );
-#endif
 
 #if defined(DARWIN)
 #include <MachineExceptions.h>