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/* Target-dependent code for NetBSD/arm.
Copyright (C) 2002-2020 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 "arch/arm.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 ARM_INT_REGISTER_SIZE
/* For compatibility with previous implementations 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_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);
}
void
_initialize_arm_netbsd_tdep (void)
{
gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD,
arm_netbsd_elf_init_abi);
}
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