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

/* ARC-specific support for 32-bit ELF
   Copyright (C) 1994 Free Software Foundation, Inc.
   Contributed by Doug Evans (dje@cygnus.com).

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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "libelf.h"

static bfd_reloc_status_type arc_elf_unsupported_reloc
  PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static const struct reloc_howto_struct *bfd_elf32_bfd_reloc_type_lookup
  PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
static void arc_info_to_howto
  PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst));

enum reloc_type
{
  R_ARC_NONE = 0,
  R_ARC_ADDR32,
  R_ARC_B22_PCREL,
  R_ARC_max
};

static reloc_howto_type elf_arc_howto_table[] =
{
  /* This reloc does nothing.  */
  HOWTO (R_ARC_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_ARC_NONE",          /* name */                                 
	 false,	                /* partial_inplace */                      
	 0,		        /* src_mask */                             
	 0,            		/* dst_mask */                             
	 false),                /* pcrel_offset */

  /* A standard 32 bit relocation.  */
  HOWTO (R_ARC_ADDR32,          /* 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_ARC_ADDR32",	/* name */
	 false,	                /* partial_inplace */                      
	 0,		        /* src_mask */                             
	 0xffffffff,   		/* dst_mask */                             
	 false),                /* pcrel_offset */

  /* A relative 22 bit branch; the lower two bits must be zero.  */
  HOWTO (R_ARC_B22_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_ARC_B22_PCREL",	/* name */
	 false,	                /* partial_inplace */                      
	 0,		        /* src_mask */                             
	 0x07ffff80,   		/* dst_mask */                             
	 true),                 /* pcrel_offset */

};

/* Don't pretend we can deal with unsupported relocs.  */

static bfd_reloc_status_type
arc_elf_unsupported_reloc (abfd, reloc_entry, symbol, data, input_section,
			   output_bfd, error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  abort ();
}

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

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

static const struct arc_reloc_map arc_reloc_map[] =
{
  { BFD_RELOC_NONE, R_ARC_NONE, },
  { BFD_RELOC_32, R_ARC_ADDR32 },
  { BFD_RELOC_CTOR, R_ARC_ADDR32 },
  { BFD_RELOC_ARC_B22_PCREL, R_ARC_B22_PCREL },
};

static const struct reloc_howto_struct *
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
     bfd *abfd;
     bfd_reloc_code_real_type code;
{
  int i;

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

  return NULL;
}

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

static void
arc_info_to_howto (abfd, cache_ptr, dst)
     bfd *abfd;
     arelent *cache_ptr;
     Elf32_Internal_Rela *dst;
{
  BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_ARC_max);
  cache_ptr->howto = &elf_arc_howto_table[ELF32_R_TYPE (dst->r_info)];
}

#define TARGET_BIG_SYM		bfd_elf32_arc_vec
#define TARGET_BIG_NAME		"elf32-arc"
#define ELF_ARCH		bfd_arch_arc
#define ELF_MACHINE_CODE	EM_CYGNUS_ARC
#define ELF_MAXPAGESIZE		0x10000
#define elf_info_to_howto	arc_info_to_howto

#include "elf32-target.h"
Commit	Line	Data
82b1edf7 KR	1	/* ARC-specific support for 32-bit ELF
	2	Copyright (C) 1994 Free Software Foundation, Inc.
	3	Contributed by Doug Evans (dje@cygnus.com).
	4
	5	This file is part of BFD, the Binary File Descriptor library.
	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 2 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, write to the Free Software
	19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
	20
	21	#include "bfd.h"
	22	#include "sysdep.h"
	23	#include "libbfd.h"
	24	#include "libelf.h"
	25
	26	static bfd_reloc_status_type arc_elf_unsupported_reloc
	27	PARAMS ((bfd , arelent , asymbol , PTR, asection , bfd , char *));
	28	static const struct reloc_howto_struct *bfd_elf32_bfd_reloc_type_lookup
	29	PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
	30	static void arc_info_to_howto
	31	PARAMS ((bfd abfd, arelent cache_ptr, Elf32_Internal_Rela *dst));
	32
	33	enum reloc_type
	34	{
	35	R_ARC_NONE = 0,
	36	R_ARC_ADDR32,
	37	R_ARC_B22_PCREL,
	38	R_ARC_max
	39	};
	40
	41	static reloc_howto_type elf_arc_howto_table[] =
	42	{
	43	/* This reloc does nothing. */
	44	HOWTO (R_ARC_NONE, /* type */
	45	0, /* rightshift */
	46	2, /* size (0 = byte, 1 = short, 2 = long) */
	47	32, /* bitsize */
	48	false, /* pc_relative */
	49	0, /* bitpos */
	50	complain_overflow_bitfield, /* complain_on_overflow */
	51	bfd_elf_generic_reloc, /* special_function */
	52	"R_ARC_NONE", /* name */
	53	false, /* partial_inplace */
	54	0, /* src_mask */
	55	0, /* dst_mask */
	56	false), /* pcrel_offset */
	57
	58	/* A standard 32 bit relocation. */
	59	HOWTO (R_ARC_ADDR32, /* type */
	60	0, /* rightshift */
	61	2, /* size (0 = byte, 1 = short, 2 = long) */
	62	32, /* bitsize */
	63	false, /* pc_relative */
	64	0, /* bitpos */
65	complain_overflow_bitfield, /* complain_on_overflow */
66	bfd_elf_generic_reloc, /* special_function */
67	"R_ARC_ADDR32", /* name */
68	false, /* partial_inplace */
69	0, /* src_mask */
70	0xffffffff, /* dst_mask */
71	false), /* pcrel_offset */
72
73	/* A relative 22 bit branch; the lower two bits must be zero. */
74	HOWTO (R_ARC_B22_PCREL, /* type */
75	2, /* rightshift */
76	2, /* size (0 = byte, 1 = short, 2 = long) */
77	22, /* bitsize */
78	true, /* pc_relative */
79	7, /* bitpos */
80	complain_overflow_signed, /* complain_on_overflow */
81	bfd_elf_generic_reloc, /* special_function */
82	"R_ARC_B22_PCREL", /* name */
83	false, /* partial_inplace */
84	0, /* src_mask */
85	0x07ffff80, /* dst_mask */
86	true), /* pcrel_offset */
87
88	};
89
90	/* Don't pretend we can deal with unsupported relocs. */
91
92	static bfd_reloc_status_type
93	arc_elf_unsupported_reloc (abfd, reloc_entry, symbol, data, input_section,
94	output_bfd, error_message)
95	bfd *abfd;
96	arelent *reloc_entry;
97	asymbol *symbol;
98	PTR data;
99	asection *input_section;
100	bfd *output_bfd;
101	char **error_message;
102	{
103	abort ();
104	}
105
106	/* Map BFD reloc types to PowerPC ELF reloc types. */
107
108	struct arc_reloc_map
109	{
110	unsigned char bfd_reloc_val;
111	unsigned char elf_reloc_val;
112	};
113
114	static const struct arc_reloc_map arc_reloc_map[] =
115	{
116	{ BFD_RELOC_NONE, R_ARC_NONE, },
117	{ BFD_RELOC_32, R_ARC_ADDR32 },
118	{ BFD_RELOC_CTOR, R_ARC_ADDR32 },
119	{ BFD_RELOC_ARC_B22_PCREL, R_ARC_B22_PCREL },
120	};
121
122	static const struct reloc_howto_struct *
123	bfd_elf32_bfd_reloc_type_lookup (abfd, code)
124	bfd *abfd;
125	bfd_reloc_code_real_type code;
126	{
127	int i;
128
129	for (i = 0;
130	i < sizeof (arc_reloc_map) / sizeof (struct arc_reloc_map);
131	i++)
132	{
133	if (arc_reloc_map[i].bfd_reloc_val == code)
134	return &elf_arc_howto_table[arc_reloc_map[i].elf_reloc_val];
135	}
136
137	return NULL;
138	}
139
140	/* Set the howto pointer for an ARC ELF reloc. */
141
142	static void
143	arc_info_to_howto (abfd, cache_ptr, dst)
144	bfd *abfd;
145	arelent *cache_ptr;
146	Elf32_Internal_Rela *dst;
147	{
148	BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_ARC_max);
149	cache_ptr->howto = &elf_arc_howto_table[ELF32_R_TYPE (dst->r_info)];
150	}
151
152	#define TARGET_BIG_SYM bfd_elf32_arc_vec
153	#define TARGET_BIG_NAME "elf32-arc"
154	#define ELF_ARCH bfd_arch_arc
155	#define ELF_MACHINE_CODE EM_CYGNUS_ARC
156	#define ELF_MAXPAGESIZE 0x10000
157	#define elf_info_to_howto arc_info_to_howto
158
159	#include "elf32-target.h"