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