1/* Intel 960 specific support for 32-bit ELF 2 Copyright (C) 1999-2017 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 3 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., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21#include "sysdep.h" 22#include "bfd.h" 23#include "libbfd.h" 24#include "elf-bfd.h" 25#include "elf/i960.h" 26 27#define USE_REL 1 28 29#define bfd_elf32_bfd_reloc_type_lookup elf32_i960_reloc_type_lookup 30#define bfd_elf32_bfd_reloc_name_lookup \ 31 elf32_i960_reloc_name_lookup 32#define elf_info_to_howto elf32_i960_info_to_howto 33#define elf_info_to_howto_rel elf32_i960_info_to_howto_rel 34 35/* ELF relocs are against symbols. If we are producing relocatable 36 output, and the reloc is against an external symbol, and nothing 37 has given us any additional addend, the resulting reloc will also 38 be against the same symbol. In such a case, we don't want to 39 change anything about the way the reloc is handled, since it will 40 all be done at final link time. Rather than put special case code 41 into bfd_perform_relocation, all the reloc types use this howto 42 function. It just short circuits the reloc if producing 43 relocatable output against an external symbol. */ 44 45static bfd_reloc_status_type 46elf32_i960_relocate (bfd *abfd ATTRIBUTE_UNUSED, 47 arelent *reloc_entry, 48 asymbol *symbol, 49 void * data ATTRIBUTE_UNUSED, 50 asection *input_section, 51 bfd *output_bfd, 52 char **error_message ATTRIBUTE_UNUSED) 53{ 54 /* HACK: I think this first condition is necessary when producing 55 relocatable output. After the end of HACK, the code is identical 56 to bfd_elf_generic_reloc(). I would _guess_ the first change 57 belongs there rather than here. martindo 1998-10-23. */ 58 if (output_bfd != (bfd *) NULL 59 && reloc_entry->howto->pc_relative 60 && !reloc_entry->howto->pcrel_offset) 61 reloc_entry->addend -= symbol->value; 62 63 /* This is more dubious. */ 64 else if (output_bfd != (bfd *) NULL 65 && (symbol->flags & BSF_SECTION_SYM) != 0) 66 reloc_entry->addend -= symbol->section->output_section->vma; 67 68 else 69 { 70 /* ...end of HACK. */ 71 if (output_bfd != (bfd *) NULL 72 && (symbol->flags & BSF_SECTION_SYM) == 0 73 && (! reloc_entry->howto->partial_inplace 74 || reloc_entry->addend == 0)) 75 { 76 reloc_entry->address += input_section->output_offset; 77 return bfd_reloc_ok; 78 } 79 } 80 81 return bfd_reloc_continue; 82} 83 84static reloc_howto_type elf_howto_table[]= 85{ 86 HOWTO (R_960_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, 87 elf32_i960_relocate, "R_960_NONE", TRUE, 88 0x00000000, 0x00000000, FALSE), 89 EMPTY_HOWTO (1), 90 HOWTO (R_960_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 91 elf32_i960_relocate, "R_960_32", TRUE, 92 0xffffffff, 0xffffffff, FALSE), 93 HOWTO (R_960_IP24, 0, 2, 24, TRUE, 0, complain_overflow_signed, 94 elf32_i960_relocate, "R_960_IP24 ", TRUE, 95 0x00ffffff, 0x00ffffff, FALSE), 96 EMPTY_HOWTO (4), 97 EMPTY_HOWTO (5), 98 EMPTY_HOWTO (6), 99 EMPTY_HOWTO (7) 100}; 101 102static enum elf_i960_reloc_type 103elf32_i960_bfd_to_reloc_type (bfd_reloc_code_real_type code) 104{ 105 switch (code) 106 { 107 default: 108 return R_960_NONE; 109 case BFD_RELOC_I960_CALLJ: 110 return R_960_OPTCALL; 111 case BFD_RELOC_32: 112 case BFD_RELOC_CTOR: 113 return R_960_32; 114 case BFD_RELOC_24_PCREL: 115 return R_960_IP24; 116 } 117} 118 119static void 120elf32_i960_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, 121 arelent * cache_ptr ATTRIBUTE_UNUSED, 122 Elf_Internal_Rela * dst ATTRIBUTE_UNUSED) 123{ 124 abort (); 125} 126 127static void 128elf32_i960_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, 129 arelent *cache_ptr, 130 Elf_Internal_Rela *dst) 131{ 132 enum elf_i960_reloc_type type; 133 134 type = (enum elf_i960_reloc_type) ELF32_R_TYPE (dst->r_info); 135 136 /* PR 17521: file: 9609b8d6. */ 137 if (type >= R_960_max) 138 { 139 /* xgettext:c-format */ 140 _bfd_error_handler (_("%B: invalid i960 reloc number: %d"), abfd, type); 141 type = 0; 142 } 143 144 cache_ptr->howto = &elf_howto_table[(int) type]; 145} 146 147static reloc_howto_type * 148elf32_i960_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 149 bfd_reloc_code_real_type code) 150{ 151 return elf_howto_table + elf32_i960_bfd_to_reloc_type (code); 152} 153 154static reloc_howto_type * 155elf32_i960_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 156 const char *r_name) 157{ 158 unsigned int i; 159 160 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) 161 if (elf_howto_table[i].name != NULL 162 && strcasecmp (elf_howto_table[i].name, r_name) == 0) 163 return &elf_howto_table[i]; 164 165 return NULL; 166} 167 168#define TARGET_LITTLE_SYM i960_elf32_vec 169#define TARGET_LITTLE_NAME "elf32-i960" 170#define ELF_ARCH bfd_arch_i960 171#define ELF_MACHINE_CODE EM_960 172#define ELF_MAXPAGESIZE 1 /* FIXME: This number is wrong, It should be the page size in bytes. */ 173 174#include "elf32-target.h" 175