123 lines
3.9 KiB
C
123 lines
3.9 KiB
C
/* Target-dependent code for NetBSD/arm.
|
|
|
|
Copyright (C) 2002-2014 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 "osabi.h"
|
|
|
|
#include <string.h>
|
|
|
|
#include "arm-tdep.h"
|
|
#include "solib-svr4.h"
|
|
|
|
/* Description of the longjmp buffer. */
|
|
#define ARM_NBSD_JB_PC 24
|
|
#define ARM_NBSD_JB_ELEMENT_SIZE INT_REGISTER_SIZE
|
|
|
|
/* For compatibility with previous implemenations of GDB on arm/NetBSD,
|
|
override the default little-endian breakpoint. */
|
|
static const gdb_byte arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
|
|
static const gdb_byte arm_nbsd_arm_be_breakpoint[] = {0xe6, 0x00, 0x00, 0x11};
|
|
static const gdb_byte arm_nbsd_thumb_le_breakpoint[] = {0xfe, 0xde};
|
|
static const gdb_byte arm_nbsd_thumb_be_breakpoint[] = {0xde, 0xfe};
|
|
|
|
static void
|
|
arm_netbsd_init_abi_common (struct gdbarch_info info,
|
|
struct gdbarch *gdbarch)
|
|
{
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
tdep->lowest_pc = 0x8000;
|
|
switch (info.byte_order)
|
|
{
|
|
case BFD_ENDIAN_LITTLE:
|
|
tdep->arm_breakpoint = arm_nbsd_arm_le_breakpoint;
|
|
tdep->thumb_breakpoint = arm_nbsd_thumb_le_breakpoint;
|
|
tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_le_breakpoint);
|
|
tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_le_breakpoint);
|
|
break;
|
|
|
|
case BFD_ENDIAN_BIG:
|
|
tdep->arm_breakpoint = arm_nbsd_arm_be_breakpoint;
|
|
tdep->thumb_breakpoint = arm_nbsd_thumb_be_breakpoint;
|
|
tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_be_breakpoint);
|
|
tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_be_breakpoint);
|
|
break;
|
|
|
|
default:
|
|
internal_error (__FILE__, __LINE__,
|
|
_("arm_gdbarch_init: bad byte order for float format"));
|
|
}
|
|
|
|
tdep->jb_pc = ARM_NBSD_JB_PC;
|
|
tdep->jb_elt_size = ARM_NBSD_JB_ELEMENT_SIZE;
|
|
|
|
/* Single stepping. */
|
|
set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
|
|
}
|
|
|
|
static void
|
|
arm_netbsd_aout_init_abi (struct gdbarch_info info,
|
|
struct gdbarch *gdbarch)
|
|
{
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
arm_netbsd_init_abi_common (info, gdbarch);
|
|
if (tdep->fp_model == ARM_FLOAT_AUTO)
|
|
tdep->fp_model = ARM_FLOAT_SOFT_FPA;
|
|
}
|
|
|
|
static void
|
|
arm_netbsd_elf_init_abi (struct gdbarch_info info,
|
|
struct gdbarch *gdbarch)
|
|
{
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
arm_netbsd_init_abi_common (info, gdbarch);
|
|
if (tdep->fp_model == ARM_FLOAT_AUTO)
|
|
tdep->fp_model = ARM_FLOAT_SOFT_VFP;
|
|
|
|
/* NetBSD ELF uses SVR4-style shared libraries. */
|
|
set_solib_svr4_fetch_link_map_offsets
|
|
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
|
|
}
|
|
|
|
static enum gdb_osabi
|
|
arm_netbsd_aout_osabi_sniffer (bfd *abfd)
|
|
{
|
|
if (strcmp (bfd_get_target (abfd), "a.out-arm-netbsd") == 0)
|
|
return GDB_OSABI_NETBSD_AOUT;
|
|
|
|
return GDB_OSABI_UNKNOWN;
|
|
}
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
extern initialize_file_ftype _initialize_arm_netbsd_tdep;
|
|
|
|
void
|
|
_initialize_arm_netbsd_tdep (void)
|
|
{
|
|
gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_aout_flavour,
|
|
arm_netbsd_aout_osabi_sniffer);
|
|
|
|
gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_AOUT,
|
|
arm_netbsd_aout_init_abi);
|
|
gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD_ELF,
|
|
arm_netbsd_elf_init_abi);
|
|
}
|