mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +08:00
c8edd8b484
procfs appears to be broken when debugging on multi-processor
machines. So enable software single stepping in order to avoid
using the procfs interface to do next/step operations, using
internal breakpoints instead.
* infrun.c (handle_inferior_event): Readjust the stop_pc by
DECR_PC_AFTER_BREAK when hitting a single step breakpoint, to
make this pc address equal to the value it would have if the
system stepping capability was used. Also set a new flag used
to ensure that we don't readjust the PC one more time later.
* breakpoint.c (bpstat_stop_status): Do not adjust the PC
address by DECR_PC_AFTER_BREAK when software single step is
in use for this architecture, as this has already been taken
care of in handle_inferior_event().
78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/* Target-dependent code for OSF/1 on Alpha.
|
|
Copyright 2002 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
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
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. */
|
|
|
|
#include "defs.h"
|
|
#include "frame.h"
|
|
#include "gdbcore.h"
|
|
#include "value.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));
|
|
}
|
|
|
|
static CORE_ADDR
|
|
alpha_osf1_sigcontext_addr (struct frame_info *frame)
|
|
{
|
|
return (read_memory_integer (frame->next ? frame->next->frame
|
|
: frame->frame, 8));
|
|
}
|
|
|
|
static void
|
|
alpha_osf1_init_abi (struct gdbarch_info info,
|
|
struct gdbarch *gdbarch)
|
|
{
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (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;
|
|
tdep->jb_elt_size = 8;
|
|
}
|
|
|
|
void
|
|
_initialize_alpha_osf1_tdep (void)
|
|
{
|
|
gdbarch_register_osabi (bfd_arch_alpha, GDB_OSABI_OSF1, alpha_osf1_init_abi);
|
|
}
|