/* Target-dependent code for OSF/1 on Alpha.
- Copyright 2002 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003 Free Software Foundation, Inc.
This file is part of GDB.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#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 *next_frame)
{
- return (func_name != NULL && STREQ ("__sigtramp", func_name));
+ const struct frame_id next_id = get_frame_id (next_frame);
+
+ return (read_memory_integer (next_id.stack_addr, 8));
}
static void
{
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);
}