2005-11-09 Randolph Chung <tausq@debian.org>

[deliverable/binutils-gdb.git] / gdb / alpha-osf1-tdep.c

diff --git a/gdb/alpha-osf1-tdep.c b/gdb/alpha-osf1-tdep.c
index 1c52329d3230eb652492fd70d7458166a100ab93..d97f6c15999c5edea3728aa318abed5333d76719 100644 (file)
--- a/gdb/alpha-osf1-tdep.c
+++ b/gdb/alpha-osf1-tdep.c
@@ -28,19 +28,6 @@
 
 #include "alpha-tdep.h"
 
-/* Under OSF/1, the __sigtramp routine is frameless and has a frame
-   size of zero, but we are able to backtrace through it.  */
-static CORE_ADDR
-alpha_osf1_skip_sigtramp_frame (struct frame_info *frame, CORE_ADDR pc)
-{
-  char *name;
-
-  find_pc_partial_function (pc, &name, (CORE_ADDR *) NULL, (CORE_ADDR *) NULL);
-  if (PC_IN_SIGTRAMP (pc, name))
-    return frame->frame;
-  return 0;
-}
-
 static int
 alpha_osf1_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
 {
@@ -48,34 +35,11 @@ alpha_osf1_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
 }
 
 static CORE_ADDR
-alpha_osf1_sigcontext_addr (struct frame_info *frame)
+alpha_osf1_sigcontext_addr (struct frame_info *next_frame)
 {
-  return (read_memory_integer (frame->next ? frame->next->frame
-                                          : frame->frame, 8));
-}
+  const struct frame_id next_id = get_frame_id (next_frame);
 
-/* This is the definition of CALL_DUMMY_ADDRESS.  It's a heuristic that is used
-   to find a convenient place in the text segment to stick a breakpoint to
-   detect the completion of a target function call (ala call_function_by_hand).
- */
-
-static CORE_ADDR
-alpha_call_dummy_address (void)
-{
-  CORE_ADDR entry;
-  struct minimal_symbol *sym;
-
-  entry = entry_point_address ();
-
-  if (entry != 0)
-    return entry;
-
-  sym = lookup_minimal_symbol ("_Prelude", NULL, symfile_objfile);
-
-  if (!sym || MSYMBOL_TYPE (sym) != mst_text)
-    return 0;
-  else
-    return SYMBOL_VALUE_ADDRESS (sym) + 4;
+  return (read_memory_integer (next_id.stack_addr, 8));
 }
 
 static void
@@ -84,19 +48,16 @@ alpha_osf1_init_abi (struct gdbarch_info info,
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
-  set_gdbarch_pc_in_sigtramp (gdbarch, alpha_osf1_pc_in_sigtramp);
+  /* Hook into the MDEBUG frame unwinder.  */
+  alpha_mdebug_init_abi (info, gdbarch);
+
   /* The next/step support via procfs on OSF1 is broken when running
      on multi-processor machines. We need to use software single stepping
      instead.  */
   set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);
 
-  /* Alpha OSF/1 inhibits execution of code on the stack.  But there is
-     no need for a dummy on the Alpha.  PUSH_ARGUMENTS takes care of all
-     argument handling and bp_call_dummy takes care of stopping the dummy.  */
-  set_gdbarch_call_dummy_address (gdbarch, alpha_call_dummy_address);
-
-  tdep->skip_sigtramp_frame = alpha_osf1_skip_sigtramp_frame;
   tdep->sigcontext_addr = alpha_osf1_sigcontext_addr;
+  tdep->pc_in_sigtramp = alpha_osf1_pc_in_sigtramp;
 
   tdep->jb_pc = 2;
   tdep->jb_elt_size = 8;