1/* Intel 960 specific support for 32-bit ELF 2 Copyright 1999, 2000, 2001, 2002, 2003, 2005, 2007 3 Free Software Foundation, Inc. 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 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, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22#include "sysdep.h" 23#include "bfd.h" 24#include "libbfd.h" 25#include "elf-bfd.h" 26#include "elf/i960.h" 27 28#define USE_REL 1 29 30#define bfd_elf32_bfd_reloc_type_lookup elf32_i960_reloc_type_lookup 31#define bfd_elf32_bfd_reloc_name_lookup \ 32 elf32_i960_reloc_name_lookup 33#define elf_info_to_howto elf32_i960_info_to_howto 34#define elf_info_to_howto_rel elf32_i960_info_to_howto_rel 35 36/* ELF relocs are against symbols. If we are producing relocatable 37 output, and the reloc is against an external symbol, and nothing 38 has given us any additional addend, the resulting reloc will also 39 be against the same symbol. In such a case, we don't want to 40 change anything about the way the reloc is handled, since it will 41 all be done at final link time. Rather than put special case code 42 into bfd_perform_relocation, all the reloc types use this howto 43 function. It just short circuits the reloc if producing 44 relocatable output against an external symbol. */ 45 46static bfd_reloc_status_type 47elf32_i960_relocate (bfd *abfd ATTRIBUTE_UNUSED, 48 arelent *reloc_entry, 49 asymbol *symbol, 50 PTR data ATTRIBUTE_UNUSED, 51 asection *input_section, 52 bfd *output_bfd, 53 char **error_message ATTRIBUTE_UNUSED) 54{ 55 /* HACK: I think this first condition is necessary when producing 56 relocatable output. After the end of HACK, the code is identical 57 to bfd_elf_generic_reloc(). I would _guess_ the first change 58 belongs there rather than here. martindo 1998-10-23. */ 59 if (output_bfd != (bfd *) NULL 60 && reloc_entry->howto->pc_relative 61 && !reloc_entry->howto->pcrel_offset) 62 reloc_entry->addend -= symbol->value; 63 64 /* This is more dubious. */ 65 else if (output_bfd != (bfd *) NULL 66 && (symbol->flags & BSF_SECTION_SYM) != 0) 67 reloc_entry->addend -= symbol->section->output_section->vma; 68 69 else 70 { 71 /* ...end of HACK. */ 72 if (output_bfd != (bfd *) NULL 73 && (symbol->flags & BSF_SECTION_SYM) == 0 74 && (! reloc_entry->howto->partial_inplace 75 || reloc_entry->addend == 0)) 76 { 77 reloc_entry->address += input_section->output_offset; 78 return bfd_reloc_ok; 79 } 80 } 81 82 return bfd_reloc_continue; 83} 84 85static reloc_howto_type elf_howto_table[]= 86{ 87 HOWTO (R_960_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield, 88 elf32_i960_relocate, "R_960_NONE", TRUE, 89 0x00000000, 0x00000000, FALSE), 90 EMPTY_HOWTO (1), 91 HOWTO (R_960_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 92 elf32_i960_relocate, "R_960_32", TRUE, 93 0xffffffff, 0xffffffff, FALSE), 94 HOWTO (R_960_IP24, 0, 2, 24, TRUE, 0, complain_overflow_signed, 95 elf32_i960_relocate, "R_960_IP24 ", TRUE, 96 0x00ffffff, 0x00ffffff, FALSE), 97 EMPTY_HOWTO (4), 98 EMPTY_HOWTO (5), 99 EMPTY_HOWTO (6), 100 EMPTY_HOWTO (7) 101}; 102 103static enum elf_i960_reloc_type 104elf32_i960_bfd_to_reloc_type (bfd_reloc_code_real_type code) 105{ 106 switch (code) 107 { 108 default: 109 return R_960_NONE; 110 case BFD_RELOC_I960_CALLJ: 111 return R_960_OPTCALL; 112 case BFD_RELOC_32: 113 case BFD_RELOC_CTOR: 114 return R_960_32; 115 case BFD_RELOC_24_PCREL: 116 return R_960_IP24; 117 } 118} 119 120static void 121elf32_i960_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, 122 arelent * cache_ptr ATTRIBUTE_UNUSED, 123 Elf_Internal_Rela * dst ATTRIBUTE_UNUSED) 124{ 125 abort (); 126} 127 128static void 129elf32_i960_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, 130 arelent *cache_ptr, 131 Elf_Internal_Rela *dst) 132{ 133 enum elf_i960_reloc_type type; 134 135 type = (enum elf_i960_reloc_type) ELF32_R_TYPE (dst->r_info); 136 BFD_ASSERT (type < R_960_max); 137 138 cache_ptr->howto = &elf_howto_table[(int) type]; 139} 140 141static reloc_howto_type * 142elf32_i960_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 143 bfd_reloc_code_real_type code) 144{ 145 return elf_howto_table + elf32_i960_bfd_to_reloc_type (code); 146} 147 148static reloc_howto_type * 149elf32_i960_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 150 const char *r_name) 151{ 152 unsigned int i; 153 154 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) 155 if (elf_howto_table[i].name != NULL 156 && strcasecmp (elf_howto_table[i].name, r_name) == 0) 157 return &elf_howto_table[i]; 158 159 return NULL; 160} 161 162#define TARGET_LITTLE_SYM bfd_elf32_i960_vec 163#define TARGET_LITTLE_NAME "elf32-i960" 164#define ELF_ARCH bfd_arch_i960 165#define ELF_MACHINE_CODE EM_960 166#define ELF_MAXPAGESIZE 1 /* FIXME: This number is wrong, It should be the page size in bytes. */ 167 168#include "elf32-target.h" 169