[deliverable/binutils-gdb.git] / bfd / elf32-v850.c

/* V850-specific support for 32-bit ELF
   Copyright (C) 1994, 1995 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 v850_info_to_howto_rel
  PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));


/* Try to minimize the amount of space occupied by relocation tables
   on the ROM (not that the ROM won't be swamped by other ELF overhead).  */
#define USE_REL

enum reloc_type
{
  R_V850_NONE = 0,
  R_V850_9_PCREL,
  R_V850_22_PCREL,
  R_V850_HI16_S,
  R_V850_HI16,
  R_V850_LO16,
  R_V850_max
};

static reloc_howto_type elf_v850_howto_table[] =
{
  /* This reloc does nothing.  */
  HOWTO (R_V850_NONE,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 32,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_V850_NONE",		/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0,			/* dst_mask */
	 false),		/* pcrel_offset */

  /* A PC relative 9 bit branch. */
  HOWTO (R_V850_9_PCREL,	/* type */
	 2,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 26,			/* bitsize */
	 true,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_V850_9_PCREL",	/* name */
	 false,			/* partial_inplace */
	 0x00ffffff,		/* src_mask */
	 0x00ffffff,		/* dst_mask */
	 true),			/* pcrel_offset */

  /* A PC relative 22 bit branch. */
  HOWTO (R_V850_22_PCREL,	/* type */
	 2,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 22,			/* bitsize */
	 true,			/* pc_relative */
	 7,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_V850_22_PCREL",	/* name */
	 false,			/* partial_inplace */
	 0x07ffff80,		/* src_mask */
	 0x07ffff80,		/* dst_mask */
	 true),			/* pcrel_offset */

  /* High 16 bits of symbol value.  */
  HOWTO (R_V850_HI16_S,         /* type */
         0,                     /* rightshift */
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
         16,                    /* bitsize */
         false,                 /* pc_relative */
         16,                    /* bitpos */
         complain_overflow_dont,/* complain_on_overflow */
         bfd_elf_generic_reloc, /* special_function */
         "R_V850_HI16_S",       /* name */
         true,                  /* partial_inplace */
         0xffff,                /* src_mask */
         0xffff,                /* dst_mask */
         false),                /* pcrel_offset */

  /* High 16 bits of symbol value.  */
  HOWTO (R_V850_HI16,           /* type */
         0,                     /* rightshift */
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
         16,                    /* bitsize */
         false,                 /* pc_relative */
         16,                    /* bitpos */
         complain_overflow_dont,/* complain_on_overflow */
         bfd_elf_generic_reloc, /* special_function */
         "R_V850_HI16",         /* name */
         true,                  /* partial_inplace */
         0xffff,                /* src_mask */
         0xffff,                /* dst_mask */
         false),                /* pcrel_offset */

  /* Low 16 bits of symbol value.  */
  HOWTO (R_V850_LO16,           /* type */
         0,                     /* rightshift */
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
         16,                    /* bitsize */
         false,                 /* pc_relative */
         16,                     /* bitpos */
         complain_overflow_dont,/* complain_on_overflow */
         bfd_elf_generic_reloc, /* special_function */
         "R_V850_LO16",         /* name */
         true,                  /* partial_inplace */
         0xffff,                /* src_mask */
         0xffff,                /* dst_mask */
         false),                /* pcrel_offset */
};

/* Map BFD reloc types to V850 ELF reloc types.  */

struct v850_reloc_map
{
  unsigned char bfd_reloc_val;
  unsigned char elf_reloc_val;
};

static const struct v850_reloc_map v850_reloc_map[] =
{
  { BFD_RELOC_NONE, R_V850_NONE, },
  { BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL, },
  { BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL, },
  { BFD_RELOC_HI16_S, R_V850_HI16_S, },
  { BFD_RELOC_HI16, R_V850_HI16, },
  { BFD_RELOC_LO16, R_V850_LO16, },
};

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 (v850_reloc_map) / sizeof (struct v850_reloc_map);
       i++)
    {
      if (v850_reloc_map[i].bfd_reloc_val == code)
	return &elf_v850_howto_table[v850_reloc_map[i].elf_reloc_val];
    }

  return NULL;
}

/* Set the howto pointer for an V850 ELF reloc.  */

static void
v850_info_to_howto_rel (abfd, cache_ptr, dst)
     bfd *abfd;
     arelent *cache_ptr;
     Elf32_Internal_Rel *dst;
{
  unsigned int r_type;

  r_type = ELF32_R_TYPE (dst->r_info);
  BFD_ASSERT (r_type < (unsigned int) R_V850_max);
  cache_ptr->howto = &elf_v850_howto_table[r_type];
}

#define TARGET_BIG_SYM		bfd_elf32_v850_vec
#define TARGET_BIG_NAME		"elf32-v850"
#define ELF_ARCH		bfd_arch_v850
#define ELF_MACHINE_CODE	EM_CYGNUS_V850
#define ELF_MAXPAGESIZE		0x1000

#define elf_info_to_howto	0
#define elf_info_to_howto_rel	v850_info_to_howto_rel

#include "elf32-target.h"
Commit	Line	Data
01b49cb3 C	1	/* V850-specific support for 32-bit ELF
	2	Copyright (C) 1994, 1995 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 v850_info_to_howto_rel
	28	PARAMS ((bfd , arelent , Elf32_Internal_Rel *));
	29
	30
	31	/* Try to minimize the amount of space occupied by relocation tables
	32	on the ROM (not that the ROM won't be swamped by other ELF overhead). */
	33	#define USE_REL
	34
	35	enum reloc_type
	36	{
	37	R_V850_NONE = 0,
	38	R_V850_9_PCREL,
	39	R_V850_22_PCREL,
	40	R_V850_HI16_S,
	41	R_V850_HI16,
	42	R_V850_LO16,
	43	R_V850_max
	44	};
	45
	46	static reloc_howto_type elf_v850_howto_table[] =
	47	{
	48	/* This reloc does nothing. */
	49	HOWTO (R_V850_NONE, /* type */
	50	0, /* rightshift */
	51	2, /* size (0 = byte, 1 = short, 2 = long) */
	52	32, /* bitsize */
	53	false, /* pc_relative */
	54	0, /* bitpos */
	55	complain_overflow_bitfield, /* complain_on_overflow */
	56	bfd_elf_generic_reloc, /* special_function */
	57	"R_V850_NONE", /* name */
	58	false, /* partial_inplace */
	59	0, /* src_mask */
	60	0, /* dst_mask */
	61	false), /* pcrel_offset */
	62
	63	/* A PC relative 9 bit branch. */
	64	HOWTO (R_V850_9_PCREL, /* type */
65	2, /* rightshift */
66	2, /* size (0 = byte, 1 = short, 2 = long) */
67	26, /* bitsize */
68	true, /* pc_relative */
69	0, /* bitpos */
70	complain_overflow_bitfield, /* complain_on_overflow */
71	bfd_elf_generic_reloc, /* special_function */
72	"R_V850_9_PCREL", /* name */
73	false, /* partial_inplace */
74	0x00ffffff, /* src_mask */
75	0x00ffffff, /* dst_mask */
76	true), /* pcrel_offset */
77
78	/* A PC relative 22 bit branch. */
79	HOWTO (R_V850_22_PCREL, /* type */
80	2, /* rightshift */
81	2, /* size (0 = byte, 1 = short, 2 = long) */
82	22, /* bitsize */
83	true, /* pc_relative */
84	7, /* bitpos */
85	complain_overflow_signed, /* complain_on_overflow */
86	bfd_elf_generic_reloc, /* special_function */
87	"R_V850_22_PCREL", /* name */
88	false, /* partial_inplace */
89	0x07ffff80, /* src_mask */
90	0x07ffff80, /* dst_mask */
91	true), /* pcrel_offset */
92
93	/* High 16 bits of symbol value. */
94	HOWTO (R_V850_HI16_S, /* type */
95	0, /* rightshift */
96	1, /* size (0 = byte, 1 = short, 2 = long) */
97	16, /* bitsize */
98	false, /* pc_relative */
99	16, /* bitpos */
100	complain_overflow_dont,/* complain_on_overflow */
101	bfd_elf_generic_reloc, /* special_function */
102	"R_V850_HI16_S", /* name */
103	true, /* partial_inplace */
104	0xffff, /* src_mask */
105	0xffff, /* dst_mask */
106	false), /* pcrel_offset */
107
108	/* High 16 bits of symbol value. */
109	HOWTO (R_V850_HI16, /* type */
110	0, /* rightshift */
111	1, /* size (0 = byte, 1 = short, 2 = long) */
112	16, /* bitsize */
113	false, /* pc_relative */
114	16, /* bitpos */
115	complain_overflow_dont,/* complain_on_overflow */
116	bfd_elf_generic_reloc, /* special_function */
117	"R_V850_HI16", /* name */
118	true, /* partial_inplace */
119	0xffff, /* src_mask */
120	0xffff, /* dst_mask */
121	false), /* pcrel_offset */
122
123	/* Low 16 bits of symbol value. */
124	HOWTO (R_V850_LO16, /* type */
125	0, /* rightshift */
126	1, /* size (0 = byte, 1 = short, 2 = long) */
127	16, /* bitsize */
128	false, /* pc_relative */
129	16, /* bitpos */
130	complain_overflow_dont,/* complain_on_overflow */
131	bfd_elf_generic_reloc, /* special_function */
132	"R_V850_LO16", /* name */
133	true, /* partial_inplace */
134	0xffff, /* src_mask */
135	0xffff, /* dst_mask */
136	false), /* pcrel_offset */
137	};
138
139	/* Map BFD reloc types to V850 ELF reloc types. */
140
141	struct v850_reloc_map
142	{
143	unsigned char bfd_reloc_val;
144	unsigned char elf_reloc_val;
145	};
146
147	static const struct v850_reloc_map v850_reloc_map[] =
148	{
149	{ BFD_RELOC_NONE, R_V850_NONE, },
150	{ BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL, },
151	{ BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL, },
152	{ BFD_RELOC_HI16_S, R_V850_HI16_S, },
153	{ BFD_RELOC_HI16, R_V850_HI16, },
154	{ BFD_RELOC_LO16, R_V850_LO16, },
155	};
156
157	static reloc_howto_type *
158	bfd_elf32_bfd_reloc_type_lookup (abfd, code)
159	bfd *abfd;
160	bfd_reloc_code_real_type code;
161	{
162	unsigned int i;
163
164	for (i = 0;
165	i < sizeof (v850_reloc_map) / sizeof (struct v850_reloc_map);
166	i++)
167	{
168	if (v850_reloc_map[i].bfd_reloc_val == code)
169	return &elf_v850_howto_table[v850_reloc_map[i].elf_reloc_val];
170	}
171
172	return NULL;
173	}
174
175	/* Set the howto pointer for an V850 ELF reloc. */
176
177	static void
178	v850_info_to_howto_rel (abfd, cache_ptr, dst)
179	bfd *abfd;
180	arelent *cache_ptr;
181	Elf32_Internal_Rel *dst;
182	{
183	unsigned int r_type;
184
185	r_type = ELF32_R_TYPE (dst->r_info);
186	BFD_ASSERT (r_type < (unsigned int) R_V850_max);
187	cache_ptr->howto = &elf_v850_howto_table[r_type];
188	}
189
190	#define TARGET_BIG_SYM bfd_elf32_v850_vec
191	#define TARGET_BIG_NAME "elf32-v850"
192	#define ELF_ARCH bfd_arch_v850
193	#define ELF_MACHINE_CODE EM_CYGNUS_V850
194	#define ELF_MAXPAGESIZE 0x1000
195
196	#define elf_info_to_howto 0
197	#define elf_info_to_howto_rel v850_info_to_howto_rel
198
199	#include "elf32-target.h"