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/* Target-dependent code for OSF/1 on Alpha.
Copyright (C) 2002-2003, 2007-2012 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 3 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, 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"
static int
alpha_osf1_pc_in_sigtramp (struct gdbarch *gdbarch,
CORE_ADDR pc, char *func_name)
{
return (func_name != NULL && strcmp ("__sigtramp", func_name) == 0);
}
static CORE_ADDR
alpha_osf1_sigcontext_addr (struct frame_info *this_frame)
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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);
return (read_memory_integer (next_id.stack_addr, 8, byte_order));
}
static void
alpha_osf1_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* 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)
{
gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_OSF1,
alpha_osf1_init_abi);
}
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