[deliverable/binutils-gdb.git] / gdb / arm-nbsd-tdep.c

/* Target-dependent code for NetBSD/arm.

   Copyright (C) 2002-2019 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);
}
Commit	Line	Data
	1	/* Target-dependent code for NetBSD/arm.
	2
	3	Copyright (C) 2002-2019 Free Software Foundation, Inc.
	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 3 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program. If not, see <http://www.gnu.org/licenses/>. */
	19
	20	#include "defs.h"
	21	#include "osabi.h"
	22
	23	#include "arch/arm.h"
	24	#include "arm-tdep.h"
	25	#include "solib-svr4.h"
	26
	27	/* Description of the longjmp buffer. */
	28	#define ARM_NBSD_JB_PC 24
	29	#define ARM_NBSD_JB_ELEMENT_SIZE ARM_INT_REGISTER_SIZE
	30
	31	/* For compatibility with previous implementations of GDB on arm/NetBSD,
	32	override the default little-endian breakpoint. */
	33	static const gdb_byte arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
	34	static const gdb_byte arm_nbsd_arm_be_breakpoint[] = {0xe6, 0x00, 0x00, 0x11};
	35	static const gdb_byte arm_nbsd_thumb_le_breakpoint[] = {0xfe, 0xde};
	36	static const gdb_byte arm_nbsd_thumb_be_breakpoint[] = {0xde, 0xfe};
	37
	38	static void
	39	arm_netbsd_init_abi_common (struct gdbarch_info info,
	40	struct gdbarch *gdbarch)
	41	{
	42	struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
	43
	44	tdep->lowest_pc = 0x8000;
	45	switch (info.byte_order)
	46	{
	47	case BFD_ENDIAN_LITTLE:
	48	tdep->arm_breakpoint = arm_nbsd_arm_le_breakpoint;
	49	tdep->thumb_breakpoint = arm_nbsd_thumb_le_breakpoint;
	50	tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_le_breakpoint);
	51	tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_le_breakpoint);
	52	break;
	53
	54	case BFD_ENDIAN_BIG:
	55	tdep->arm_breakpoint = arm_nbsd_arm_be_breakpoint;
	56	tdep->thumb_breakpoint = arm_nbsd_thumb_be_breakpoint;
	57	tdep->arm_breakpoint_size = sizeof (arm_nbsd_arm_be_breakpoint);
	58	tdep->thumb_breakpoint_size = sizeof (arm_nbsd_thumb_be_breakpoint);
	59	break;
	60
	61	default:
	62	internal_error (__FILE__, __LINE__,
	63	_("arm_gdbarch_init: bad byte order for float format"));
	64	}
	65
	66	tdep->jb_pc = ARM_NBSD_JB_PC;
	67	tdep->jb_elt_size = ARM_NBSD_JB_ELEMENT_SIZE;
	68
	69	/* Single stepping. */
	70	set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
	71	}
	72
	73	static void
	74	arm_netbsd_elf_init_abi (struct gdbarch_info info,
	75	struct gdbarch *gdbarch)
	76	{
	77	struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
	78
	79	arm_netbsd_init_abi_common (info, gdbarch);
	80	if (tdep->fp_model == ARM_FLOAT_AUTO)
	81	tdep->fp_model = ARM_FLOAT_SOFT_VFP;
	82
	83	/* NetBSD ELF uses SVR4-style shared libraries. */
	84	set_solib_svr4_fetch_link_map_offsets
	85	(gdbarch, svr4_ilp32_fetch_link_map_offsets);
	86	}
	87
	88	void
	89	_initialize_arm_netbsd_tdep (void)
	90	{
	91	gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD,
	92	arm_netbsd_elf_init_abi);
	93	}