[deliverable/binutils-gdb.git] / bfd / elf32-mn10200.c

/* Matsushita 10200 specific support for 32-bit ELF
   Copyright (C) 1996, 1997 Free Software Foundation, Inc.

This file is part of BFD, the Binary File Descriptor library.

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 "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"

static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
  PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
static void mn10200_info_to_howto
  PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));


/* We have to use RELA instructions since md_apply_fix3 in the assembler
   does absolutely nothing.  */
#define USE_RELA

enum reloc_type
{
  R_MN10200_NONE = 0,
  R_MN10200_32,
  R_MN10200_16,
  R_MN10200_8,
  R_MN10200_24,
  R_MN10200_PCREL8,
  R_MN10200_PCREL24,
  R_MN10200_MAX
};

static reloc_howto_type elf_mn10200_howto_table[] =
{
  /* Dummy relocation.  Does nothing.  */
  HOWTO (R_MN10200_NONE,
	 0,
	 2,
	 16,
	 false,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_NONE",
	 false,
	 0,
	 0,
	 false),
  /* Standard 32 bit reloc.  */
  HOWTO (R_MN10200_32,
	 0,
	 2,
	 32,
	 false,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_32",
	 false,
	 0xffffffff,
	 0xffffffff,
	 false),
  /* Standard 16 bit reloc.  */
  HOWTO (R_MN10200_16,
	 0,
	 1,
	 16,
	 false,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_16",
	 false,
	 0xffff,
	 0xffff,
	 false),
  /* Standard 8 bit reloc.  */
  HOWTO (R_MN10200_8,
	 0,
	 0,
	 8,
	 false,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_8",
	 false,
	 0xff,
	 0xff,
	 false),
  /* Standard 24 bit reloc.  */
  HOWTO (R_MN10200_24,
	 0,
	 2,
	 24,
	 false,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_24",
	 false,
	 0xffffff,
	 0xffffff,
	 false),
  /* Simple 8 pc-relative reloc.  */
  HOWTO (R_MN10200_PCREL8,
	 0,
	 0,
	 8,
	 true,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_PCREL8",
	 false,
	 0xff,
	 0xff,
	 true),
  /* Simple 32bit pc-relative reloc with a 1 byte adjustment
     to get the pc-relative offset correct.  */
  HOWTO (R_MN10200_PCREL24,
	 0,
	 2,
	 24,
	 true,
	 0,
	 complain_overflow_bitfield,
	 bfd_elf_generic_reloc,
	 "R_MN10200_PCREL24",
	 false,
	 0xffffff,
	 0xffffff,
	 true),
};

struct mn10200_reloc_map
{
  unsigned char bfd_reloc_val;
  unsigned char elf_reloc_val;
};

static const struct mn10200_reloc_map mn10200_reloc_map[] =
{
  { BFD_RELOC_NONE, R_MN10200_NONE, },
  { BFD_RELOC_32, R_MN10200_32, },
  { BFD_RELOC_16, R_MN10200_16, },
  { BFD_RELOC_8, R_MN10200_8, },
  { BFD_RELOC_24, R_MN10200_24, },
  { BFD_RELOC_8_PCREL, R_MN10200_PCREL8, },
  { BFD_RELOC_24_PCREL, R_MN10200_PCREL24, },
};

static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
     bfd *abfd;
     bfd_reloc_code_real_type code;
{
  unsigned int i;

  for (i = 0;
       i < sizeof (mn10200_reloc_map) / sizeof (struct mn10200_reloc_map);
       i++)
    {
      if (mn10200_reloc_map[i].bfd_reloc_val == code)
	return &elf_mn10200_howto_table[mn10200_reloc_map[i].elf_reloc_val];
    }

  return NULL;
}

/* Set the howto pointer for an MN10200 ELF reloc.  */

static void
mn10200_info_to_howto (abfd, cache_ptr, dst)
     bfd *abfd;
     arelent *cache_ptr;
     Elf32_Internal_Rela *dst;
{
  unsigned int r_type;

  r_type = ELF32_R_TYPE (dst->r_info);
  BFD_ASSERT (r_type < (unsigned int) R_MN10200_MAX);
  cache_ptr->howto = &elf_mn10200_howto_table[r_type];
}

#define TARGET_LITTLE_SYM	bfd_elf32_mn10200_vec
#define TARGET_LITTLE_NAME	"elf32-mn10200"
#define ELF_ARCH		bfd_arch_mn10200
#define ELF_MACHINE_CODE	EM_CYGNUS_MN10200
#define ELF_MAXPAGESIZE		0x1000

#define elf_info_to_howto	mn10200_info_to_howto
#define elf_info_to_howto_rel	0

#define elf_symbol_leading_char '_'

#include "elf32-target.h"
Commit	Line	Data
	1	/* Matsushita 10200 specific support for 32-bit ELF
	2	Copyright (C) 1996, 1997 Free Software Foundation, Inc.
	3
	4	This file is part of BFD, the Binary File Descriptor library.
	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2 of the License, or
	9	(at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	19
	20	#include "bfd.h"
	21	#include "sysdep.h"
	22	#include "libbfd.h"
	23	#include "elf-bfd.h"
	24
	25	static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
	26	PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
	27	static void mn10200_info_to_howto
	28	PARAMS ((bfd , arelent , Elf32_Internal_Rela *));
	29
	30
	31	/* We have to use RELA instructions since md_apply_fix3 in the assembler
	32	does absolutely nothing. */
	33	#define USE_RELA
	34
	35	enum reloc_type
	36	{
	37	R_MN10200_NONE = 0,
	38	R_MN10200_32,
	39	R_MN10200_16,
	40	R_MN10200_8,
	41	R_MN10200_24,
	42	R_MN10200_PCREL8,
	43	R_MN10200_PCREL24,
	44	R_MN10200_MAX
	45	};
	46
	47	static reloc_howto_type elf_mn10200_howto_table[] =
	48	{
	49	/* Dummy relocation. Does nothing. */
	50	HOWTO (R_MN10200_NONE,
	51	0,
	52	2,
	53	16,
	54	false,
	55	0,
	56	complain_overflow_bitfield,
	57	bfd_elf_generic_reloc,
	58	"R_MN10200_NONE",
	59	false,
	60	0,
	61	0,
	62	false),
	63	/* Standard 32 bit reloc. */
	64	HOWTO (R_MN10200_32,
	65	0,
	66	2,
	67	32,
	68	false,
	69	0,
	70	complain_overflow_bitfield,
	71	bfd_elf_generic_reloc,
	72	"R_MN10200_32",
	73	false,
	74	0xffffffff,
	75	0xffffffff,
	76	false),
	77	/* Standard 16 bit reloc. */
	78	HOWTO (R_MN10200_16,
	79	0,
	80	1,
	81	16,
	82	false,
	83	0,
	84	complain_overflow_bitfield,
	85	bfd_elf_generic_reloc,
	86	"R_MN10200_16",
	87	false,
	88	0xffff,
	89	0xffff,
	90	false),
	91	/* Standard 8 bit reloc. */
	92	HOWTO (R_MN10200_8,
	93	0,
	94	0,
	95	8,
	96	false,
	97	0,
	98	complain_overflow_bitfield,
	99	bfd_elf_generic_reloc,
	100	"R_MN10200_8",
	101	false,
	102	0xff,
	103	0xff,
	104	false),
	105	/* Standard 24 bit reloc. */
	106	HOWTO (R_MN10200_24,
	107	0,
	108	2,
	109	24,
	110	false,
	111	0,
	112	complain_overflow_bitfield,
	113	bfd_elf_generic_reloc,
	114	"R_MN10200_24",
	115	false,
	116	0xffffff,
	117	0xffffff,
	118	false),
	119	/* Simple 8 pc-relative reloc. */
	120	HOWTO (R_MN10200_PCREL8,
	121	0,
	122	0,
	123	8,
	124	true,
	125	0,
	126	complain_overflow_bitfield,
	127	bfd_elf_generic_reloc,
	128	"R_MN10200_PCREL8",
	129	false,
	130	0xff,
	131	0xff,
	132	true),
	133	/* Simple 32bit pc-relative reloc with a 1 byte adjustment
	134	to get the pc-relative offset correct. */
	135	HOWTO (R_MN10200_PCREL24,
	136	0,
	137	2,
	138	24,
	139	true,
	140	0,
	141	complain_overflow_bitfield,
	142	bfd_elf_generic_reloc,
	143	"R_MN10200_PCREL24",
	144	false,
	145	0xffffff,
	146	0xffffff,
	147	true),
	148	};
	149
	150	struct mn10200_reloc_map
	151	{
	152	unsigned char bfd_reloc_val;
	153	unsigned char elf_reloc_val;
	154	};
	155
	156	static const struct mn10200_reloc_map mn10200_reloc_map[] =
	157	{
	158	{ BFD_RELOC_NONE, R_MN10200_NONE, },
	159	{ BFD_RELOC_32, R_MN10200_32, },
	160	{ BFD_RELOC_16, R_MN10200_16, },
	161	{ BFD_RELOC_8, R_MN10200_8, },
	162	{ BFD_RELOC_24, R_MN10200_24, },
	163	{ BFD_RELOC_8_PCREL, R_MN10200_PCREL8, },
	164	{ BFD_RELOC_24_PCREL, R_MN10200_PCREL24, },
	165	};
	166
	167	static reloc_howto_type *
	168	bfd_elf32_bfd_reloc_type_lookup (abfd, code)
	169	bfd *abfd;
	170	bfd_reloc_code_real_type code;
	171	{
	172	unsigned int i;
	173
	174	for (i = 0;
	175	i < sizeof (mn10200_reloc_map) / sizeof (struct mn10200_reloc_map);
	176	i++)
	177	{
	178	if (mn10200_reloc_map[i].bfd_reloc_val == code)
	179	return &elf_mn10200_howto_table[mn10200_reloc_map[i].elf_reloc_val];
	180	}
	181
	182	return NULL;
	183	}
	184
	185	/* Set the howto pointer for an MN10200 ELF reloc. */
	186
	187	static void
	188	mn10200_info_to_howto (abfd, cache_ptr, dst)
	189	bfd *abfd;
	190	arelent *cache_ptr;
	191	Elf32_Internal_Rela *dst;
	192	{
	193	unsigned int r_type;
	194
	195	r_type = ELF32_R_TYPE (dst->r_info);
	196	BFD_ASSERT (r_type < (unsigned int) R_MN10200_MAX);
	197	cache_ptr->howto = &elf_mn10200_howto_table[r_type];
	198	}
	199
	200	#define TARGET_LITTLE_SYM bfd_elf32_mn10200_vec
	201	#define TARGET_LITTLE_NAME "elf32-mn10200"
	202	#define ELF_ARCH bfd_arch_mn10200
	203	#define ELF_MACHINE_CODE EM_CYGNUS_MN10200
	204	#define ELF_MAXPAGESIZE 0x1000
	205
	206	#define elf_info_to_howto mn10200_info_to_howto
	207	#define elf_info_to_howto_rel 0
	208
	209	#define elf_symbol_leading_char '_'
	210
	211	#include "elf32-target.h"