/* Target-dependent code for OSF/1 on Alpha.
- Copyright 2002 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#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 int
+alpha_osf1_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
+{
+ return (func_name != NULL && strcmp ("__sigtramp", func_name) == 0);
+}
+
static CORE_ADDR
-alpha_osf1_skip_sigtramp_frame (struct frame_info *frame, CORE_ADDR pc)
+alpha_osf1_sigcontext_addr (struct frame_info *this_frame)
{
- char *name;
+ struct frame_info *next_frame = get_next_frame (this_frame);
+ struct frame_id next_id = null_frame_id;
+
+ if (next_frame != NULL)
+ next_id = get_frame_id (next_frame);
- find_pc_partial_function (pc, &name, (CORE_ADDR *) NULL, (CORE_ADDR *) NULL);
- if (PC_IN_SIGTRAMP (pc, name))
- return frame->frame;
- return 0;
+ return (read_memory_integer (next_id.stack_addr, 8));
}
static void
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- tdep->skip_sigtramp_frame = alpha_osf1_skip_sigtramp_frame;
+ /* 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->jb_pc = 2;
+ tdep->jb_elt_size = 8;
}
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_alpha_osf1_tdep;
+
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);
}