1 files changed, 42 insertions, 0 deletions
diff --git a/libjava/sysdep/i386/backtrace.h b/libjava/sysdep/i386/backtrace.h
new file mode 100644
index 0000000..b108402
--- /dev/null
+++ b/libjava/sysdep/i386/backtrace.h
@@ -0,0 +1,42 @@
+// backtrace.h - Fallback backtrace implementation. i386 implementation.
+
+/* Copyright (C) 2005  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+#ifndef __SYSDEP_BACKTRACE_H__
+#define __SYSDEP_BACKTRACE_H__
+
+#include <java-stack.h>
+
+#define HAVE_FALLBACK_BACKTRACE
+
+/* Store return addresses of the current program stack in
+   STATE and return the exact number of values stored.  */
+void
+fallback_backtrace (_Jv_UnwindState *state)
+{
+  register void *_ebp __asm__ ("ebp");
+  register void *_esp __asm__ ("esp");
+  unsigned int *rfp;
+
+  int i = state->pos;
+  for (rfp = *(unsigned int**)_ebp;
+       rfp && i < state->length;
+       rfp = *(unsigned int **)rfp)
+    {
+      int diff = *rfp - (unsigned int)rfp;
+      if ((void*)rfp < _esp || diff > 4 * 1024 || diff < 0)
+        break;
+
+      state->frames[i].type = frame_native;
+      state->frames[i].ip = (void*)(rfp[1]-4);
+      i++;
+    }
+  state->pos = i;
+}
+#endif