2002-11-15 Andrew Cagney <cagney@redhat.com>

	* frame.h (sigtramp_saved_pc): Delete declaration.
	* blockframe.c (sigtramp_saved_pc): Delete function.
	* ns32k-tdep.c (ns32k_sigtramp_saved_pc): New function.
	(ns32k_frame_saved_pc): Call ns32k_sigtramp_saved_pc.
	* vax-tdep.c (vax_sigtramp_saved_pc): New function.
	(vax_frame_saved_pc): Call vax_sigtramp_saved_pc.

1 files changed, 27 insertions, 1 deletions

diff --git a/gdb/vax-tdep.c b/gdb/vax-tdep.c
index e82227fe5e2..b76c4f87473 100644
--- a/gdb/vax-tdep.c
+++ b/gdb/vax-tdep.c
@@ -157,11 +157,37 @@ vax_frame_init_saved_regs (struct frame_info *frame)
   frame->saved_regs[PS_REGNUM] = frame->frame + 4;
 }
 
+/* Get saved user PC for sigtramp from sigcontext for BSD style sigtramp.  */
+
+static CORE_ADDR
+vax_sigtramp_saved_pc (struct frame_info *frame)
+{
+  CORE_ADDR sigcontext_addr;
+  char *buf;
+  int ptrbytes = TYPE_LENGTH (builtin_type_void_func_ptr);
+  int sigcontext_offs = (2 * TARGET_INT_BIT) / TARGET_CHAR_BIT;
+
+  buf = alloca (ptrbytes);
+  /* Get sigcontext address, it is the third parameter on the stack.  */
+  if (frame->next)
+    sigcontext_addr = read_memory_typed_address
+      (FRAME_ARGS_ADDRESS (frame->next) + FRAME_ARGS_SKIP + sigcontext_offs,
+       builtin_type_void_data_ptr);
+  else
+    sigcontext_addr = read_memory_typed_address
+      (read_register (SP_REGNUM) + sigcontext_offs, builtin_type_void_data_ptr);
+
+  /* Don't cause a memory_error when accessing sigcontext in case the stack
+     layout has changed or the stack is corrupt.  */
+  target_read_memory (sigcontext_addr + SIGCONTEXT_PC_OFFSET, buf, ptrbytes);
+  return extract_typed_address (buf, builtin_type_void_func_ptr);
+}
+
 static CORE_ADDR
 vax_frame_saved_pc (struct frame_info *frame)
 {
   if (frame->signal_handler_caller)
-    return (sigtramp_saved_pc (frame)); /* XXXJRT */
+    return (vax_sigtramp_saved_pc (frame)); /* XXXJRT */
 
   return (read_memory_integer (frame->frame + 16, 4));
 }