1 /* Intel 860 specific support for 32-bit ELF 2 Copyright 1999, 2000 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 #include "elf/i960.h" 25 26 static bfd_reloc_status_type elf32_i960_relocate 27 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); 28 static reloc_howto_type *elf32_i960_reloc_type_lookup 29 PARAMS ((bfd *, bfd_reloc_code_real_type)); 30 31 #define USE_REL 1 32 33 #define bfd_elf32_bfd_reloc_type_lookup elf32_i960_reloc_type_lookup 34 #define elf_info_to_howto elf32_i960_info_to_howto 35 #define elf_info_to_howto_rel elf32_i960_info_to_howto_rel 36 37 static reloc_howto_type elf_howto_table[]= 38 { 39 HOWTO(R_960_NONE, 0, 0, 0, false, 0, complain_overflow_bitfield, 40 elf32_i960_relocate, "R_960_NONE", true, 41 0x00000000, 0x00000000, false), 42 EMPTY_HOWTO (1), 43 HOWTO (R_960_32, 0, 2, 32, false, 0, complain_overflow_bitfield, 44 elf32_i960_relocate, "R_960_32", true, 45 0xffffffff, 0xffffffff, false), 46 HOWTO (R_960_IP24, 0, 2, 24, true, 0, complain_overflow_signed, 47 elf32_i960_relocate, "R_960_IP24 ", true, 48 0x00ffffff, 0x00ffffff, false), 49 EMPTY_HOWTO (4), 50 EMPTY_HOWTO (5), 51 EMPTY_HOWTO (6), 52 EMPTY_HOWTO (7) 53 }; 54 55 static enum elf_i960_reloc_type 56 elf32_i960_bfd_to_reloc_type (bfd_reloc_code_real_type code) 57 { 58 switch (code) 59 { 60 default: 61 return R_960_NONE; 62 case BFD_RELOC_I960_CALLJ: 63 return R_960_OPTCALL; 64 case BFD_RELOC_32: 65 case BFD_RELOC_CTOR: 66 return R_960_32; 67 case BFD_RELOC_24_PCREL: 68 return R_960_IP24; 69 } 70 } 71 72 static void 73 elf32_i960_info_to_howto (abfd, cache_ptr, dst) 74 bfd *abfd ATTRIBUTE_UNUSED; 75 arelent *cache_ptr ATTRIBUTE_UNUSED; 76 Elf32_Internal_Rela *dst ATTRIBUTE_UNUSED; 77 { 78 abort (); 79 } 80 81 static void 82 elf32_i960_info_to_howto_rel (abfd, cache_ptr, dst) 83 bfd *abfd ATTRIBUTE_UNUSED; 84 arelent *cache_ptr; 85 Elf32_Internal_Rel *dst; 86 { 87 enum elf_i960_reloc_type type; 88 89 type = (enum elf_i960_reloc_type) ELF32_R_TYPE (dst->r_info); 90 BFD_ASSERT (type < R_960_max); 91 92 cache_ptr->howto = &elf_howto_table[(int) type]; 93 } 94 95 /* ELF relocs are against symbols. If we are producing relocateable 96 output, and the reloc is against an external symbol, and nothing 97 has given us any additional addend, the resulting reloc will also 98 be against the same symbol. In such a case, we don't want to 99 change anything about the way the reloc is handled, since it will 100 all be done at final link time. Rather than put special case code 101 into bfd_perform_relocation, all the reloc types use this howto 102 function. It just short circuits the reloc if producing 103 relocateable output against an external symbol. */ 104 105 bfd_reloc_status_type 106 elf32_i960_relocate (abfd, 107 reloc_entry, 108 symbol, 109 data, 110 input_section, 111 output_bfd, 112 error_message) 113 bfd *abfd ATTRIBUTE_UNUSED; 114 arelent *reloc_entry; 115 asymbol *symbol; 116 PTR data ATTRIBUTE_UNUSED; 117 asection *input_section; 118 bfd *output_bfd; 119 char **error_message ATTRIBUTE_UNUSED; 120 { 121 /* HACK: I think this first condition is necessary when producing 122 relocatable output. After the end of HACK, the code is identical 123 to bfd_elf_generic_reloc(). I would _guess_ the first change 124 belongs there rather than here. martindo 1998-10-23. */ 125 if (output_bfd != (bfd *) NULL 126 && reloc_entry->howto->pc_relative 127 && !reloc_entry->howto->pcrel_offset) 128 { 129 reloc_entry->addend -= symbol->value; 130 } 131 /* This is more dubious. */ 132 else if (output_bfd != (bfd *) NULL 133 && (symbol->flags & BSF_SECTION_SYM) != 0) 134 { 135 reloc_entry->addend -= symbol->section->output_section->vma; 136 } 137 else 138 { 139 /* end of HACK */ 140 if (output_bfd != (bfd *) NULL 141 && (symbol->flags & BSF_SECTION_SYM) == 0 142 && (! reloc_entry->howto->partial_inplace 143 || reloc_entry->addend == 0)) 144 { 145 reloc_entry->address += input_section->output_offset; 146 return bfd_reloc_ok; 147 } 148 } 149 150 return bfd_reloc_continue; 151 } 152 153 static reloc_howto_type * 154 elf32_i960_reloc_type_lookup (abfd, code) 155 bfd *abfd ATTRIBUTE_UNUSED; 156 bfd_reloc_code_real_type code; 157 { 158 return elf_howto_table + elf32_i960_bfd_to_reloc_type (code); 159 } 160 161 #define TARGET_LITTLE_SYM bfd_elf32_i960_vec 162 #define TARGET_LITTLE_NAME "elf32-i960" 163 #define ELF_ARCH bfd_arch_i960 164 #define ELF_MACHINE_CODE EM_960 165 #define ELF_MAXPAGESIZE 1 /* FIXME: This number is wrong, It should be the page size in bytes. */ 166 167 #include "elf32-target.h" 168