2004-06-06 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 cba9134b07a297ee6ad2d0d373ce6d85e5d155e4..b5879ad551cdabe02332f05d00142fc0576f8035 100644 (file)
--- a/gdb/alpha-osf1-tdep.c
+++ b/gdb/alpha-osf1-tdep.c
@@ -1,5 +1,5 @@
 /* Target-dependent code for OSF/1 on Alpha.
-   Copyright 2002 Free Software Foundation, Inc.
+   Copyright 2002, 2003 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -20,27 +20,29 @@
 
 #include "defs.h"
 #include "frame.h"
+#include "gdbcore.h"
 #include "value.h"
+#include "osabi.h"
+#include "gdb_string.h"
+#include "objfiles.h"
 
 #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)
+static int
+alpha_osf1_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
 {
-  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;
+  return (func_name != NULL && strcmp ("__sigtramp", func_name) == 0);
 }
 
-static int
-alpha_osf1_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
+static CORE_ADDR
+alpha_osf1_sigcontext_addr (struct frame_info *frame)
 {
-  return (func_name != NULL && STREQ ("__sigtramp", func_name));
+  struct frame_info *next_frame = get_next_frame (frame);
+
+  if (next_frame != NULL)
+    return (read_memory_integer (get_frame_base (next_frame), 8));
+  else
+    return (read_memory_integer (get_frame_base (frame), 8));
 }
 
 static void
@@ -49,13 +51,24 @@ 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);
+
+  tdep->sigcontext_addr = alpha_osf1_sigcontext_addr;
+  tdep->pc_in_sigtramp = alpha_osf1_pc_in_sigtramp;
 
-  tdep->skip_sigtramp_frame = alpha_osf1_skip_sigtramp_frame;
+  tdep->jb_pc = 2;
+  tdep->jb_elt_size = 8;
 }
 
 void
 _initialize_alpha_osf1_tdep (void)
 {
-  alpha_gdbarch_register_os_abi (ALPHA_ABI_OSF1, alpha_osf1_init_abi);
+  gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_OSF1,
+                         alpha_osf1_init_abi);
 }