/* 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.
#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)
-{
- 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)
{
- return (func_name != NULL && STREQ ("__sigtramp", func_name));
+ return (func_name != NULL && strcmp ("__sigtramp", func_name) == 0);
}
static CORE_ADDR
alpha_osf1_sigcontext_addr (struct frame_info *frame)
{
- return (read_memory_integer (frame->next ? frame->next->frame
- : frame->frame, 8));
+ 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
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ /* Hook into the MDEBUG frame unwinder. */
+ alpha_mdebug_init_abi (info, gdbarch);
+
set_gdbarch_pc_in_sigtramp (gdbarch, alpha_osf1_pc_in_sigtramp);
+ /* 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->skip_sigtramp_frame = alpha_osf1_skip_sigtramp_frame;
tdep->sigcontext_addr = alpha_osf1_sigcontext_addr;
tdep->jb_pc = 2;
void
_initialize_alpha_osf1_tdep (void)
{
- gdbarch_register_osabi (bfd_arch_alpha, GDB_OSABI_OSF1, alpha_osf1_init_abi);
+ gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_OSF1,
+ alpha_osf1_init_abi);
}