| 1 | /* Copyright (C) 1990, 1991 Free Software Foundation, Inc. |
| 2 | Contributed by David Wood at New York University 7/8/91 |
| 3 | |
| 4 | This file is part of BFD, the Binary File Diddler. |
| 5 | |
| 6 | BFD 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 1, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | BFD 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 BFD; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | |
| 21 | /* $Id$ */ |
| 22 | |
| 23 | #define A29K 1 |
| 24 | |
| 25 | #include <ansidecl.h> |
| 26 | #include <sysdep.h> |
| 27 | #include "bfd.h" |
| 28 | #include "libbfd.h" |
| 29 | #include "obstack.h" |
| 30 | #include "amdcoff.h" |
| 31 | #include "internalcoff.h" |
| 32 | #include "libcoff.h" |
| 33 | |
| 34 | #define INSERT_HWORD(WORD,HWORD) \ |
| 35 | (((WORD) & 0xff00ff00) | (((HWORD) & 0xff00) << 8) | ((HWORD)& 0xff)) |
| 36 | #define EXTRACT_HWORD(WORD) (((WORD) & 0x00ff0000) >> 8) | ((WORD) & 0xff) |
| 37 | |
| 38 | /* Provided the symbol, returns the value reffed */ |
| 39 | static long |
| 40 | get_symbol_value(symbol) |
| 41 | asymbol *symbol; |
| 42 | { |
| 43 | long relocation = 0; |
| 44 | |
| 45 | if (symbol != (asymbol *)NULL) { |
| 46 | if (symbol->flags & BSF_FORT_COMM) { |
| 47 | relocation = 0; |
| 48 | } else { |
| 49 | relocation = symbol->value; |
| 50 | } |
| 51 | if (symbol->section != (asection *)NULL) { |
| 52 | relocation += symbol->section->output_section->vma + |
| 53 | symbol->section->output_offset; |
| 54 | } |
| 55 | } |
| 56 | return(relocation); |
| 57 | } |
| 58 | |
| 59 | static bfd_reloc_status_enum_type |
| 60 | a29k_reloc(abfd, reloc_entry, symbol_in, data, input_section) |
| 61 | bfd *abfd; |
| 62 | arelent *reloc_entry; |
| 63 | asymbol *symbol_in; |
| 64 | unsigned char *data; |
| 65 | asection *input_section; |
| 66 | { |
| 67 | static unsigned long part1_consth_active=0; |
| 68 | static unsigned long part1_consth_value; |
| 69 | unsigned long insn, value, sym_value; |
| 70 | unsigned short r_type; |
| 71 | /* bfd_reloc_status_enum_type result;*/ |
| 72 | /* coff_symbol_type *cs = coffsymbol(symbol_in);*/ |
| 73 | |
| 74 | r_type = reloc_entry->howto->type; |
| 75 | |
| 76 | /* FIXME: Do we need to check for partial linking here */ |
| 77 | if (symbol_in && (symbol_in->flags & BSF_UNDEFINED)) { |
| 78 | /* Keep the state machine happy in case we're called again */ |
| 79 | if (r_type == R_IHIHALF) { |
| 80 | part1_consth_active = 1; |
| 81 | part1_consth_value = 0; |
| 82 | } |
| 83 | return(bfd_reloc_undefined); |
| 84 | } |
| 85 | |
| 86 | if ((part1_consth_active) && (r_type != R_IHCONST)) { |
| 87 | fprintf(stderr,"Relocation problem : "); |
| 88 | fprintf(stderr,"Missing IHCONST in module %s\n",abfd->filename); |
| 89 | part1_consth_active = 0; |
| 90 | return(bfd_reloc_dangerous); |
| 91 | } |
| 92 | |
| 93 | insn = bfd_get_32(abfd, data + reloc_entry->address); |
| 94 | sym_value = get_symbol_value(symbol_in); |
| 95 | |
| 96 | switch (r_type) { |
| 97 | case R_IREL: |
| 98 | value = EXTRACT_HWORD(insn) << 2; |
| 99 | value += sym_value + reloc_entry->addend; |
| 100 | if (value <= 0x3ffff) { /* Absolute jmp/call */ |
| 101 | insn |= 0x01000000; /* Make it absolute */ |
| 102 | /* FIXME: Should we change r_type to R_IABS */ |
| 103 | } else { /* Relative jmp/call */ |
| 104 | value -= reloc_entry->address; |
| 105 | if (value > 0x3ffff) { |
| 106 | fprintf(stderr,"Relocation problem : "); |
| 107 | fprintf(stderr,"Jmp/call too far; to %d from %s\n", |
| 108 | symbol_in->name,abfd->filename); |
| 109 | return(bfd_reloc_outofrange); |
| 110 | } |
| 111 | } |
| 112 | value >>= 2; |
| 113 | insn = INSERT_HWORD(insn,value); |
| 114 | break; |
| 115 | case R_ILOHALF: |
| 116 | value = EXTRACT_HWORD(insn); |
| 117 | value += sym_value + reloc_entry->addend; |
| 118 | insn = INSERT_HWORD(insn,value); |
| 119 | break; |
| 120 | case R_IHIHALF: /* consth, part 1 */ |
| 121 | /* Just get the symbol value that is referenced */ |
| 122 | part1_consth_active = 1; |
| 123 | part1_consth_value = sym_value + reloc_entry->addend; |
| 124 | return(bfd_reloc_ok); /* Don't modify insn until R_IHCONST */ |
| 125 | break; |
| 126 | case R_IHCONST: /* consth, part 2 */ |
| 127 | /* Now relocate the reference */ |
| 128 | if (!part1_consth_active) { |
| 129 | fprintf(stderr,"Relocation problem : "); |
| 130 | fprintf(stderr,"IHIHALF missing in module %s\n", |
| 131 | abfd->filename); |
| 132 | part1_consth_active = 0; |
| 133 | return(bfd_reloc_dangerous); |
| 134 | } |
| 135 | /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */ |
| 136 | value = (unsigned int)reloc_entry->addend; /* r_symndx */ |
| 137 | value += part1_consth_value; |
| 138 | value >>= 16; |
| 139 | insn = INSERT_HWORD(insn,value); |
| 140 | part1_consth_active = 0; |
| 141 | break; |
| 142 | case R_BYTE: |
| 143 | value = (insn >> 24) + sym_value + reloc_entry->addend; |
| 144 | if (value & 0xffffff00) { |
| 145 | fprintf(stderr,"Relocation problem : "); |
| 146 | fprintf(stderr,"byte value too large in module %s\n", |
| 147 | abfd->filename); |
| 148 | return(bfd_reloc_overflow); |
| 149 | } |
| 150 | insn = (insn & 0x00ffffff) | (value << 24); |
| 151 | break; |
| 152 | case R_HWORD: |
| 153 | value = (insn >> 16) + sym_value + reloc_entry->addend; |
| 154 | if (value & 0xffff0000) { |
| 155 | fprintf(stderr,"Relocation problem : "); |
| 156 | fprintf(stderr,"hword value too large in module %s\n", |
| 157 | abfd->filename); |
| 158 | return(bfd_reloc_overflow); |
| 159 | } |
| 160 | insn = (insn & 0x0000ffff) | (value<<16); |
| 161 | break; |
| 162 | case R_WORD: |
| 163 | insn += sym_value + reloc_entry->addend; |
| 164 | break; |
| 165 | default: |
| 166 | fprintf(stderr,"Relocation problem : "); |
| 167 | fprintf(stderr,"Unrecognized reloc type %d, in module %s\n", |
| 168 | r_type,abfd->filename); |
| 169 | return (bfd_reloc_dangerous); |
| 170 | } |
| 171 | |
| 172 | bfd_put_32(abfd, insn, data+reloc_entry->address); |
| 173 | return(bfd_reloc_ok); |
| 174 | } |
| 175 | |
| 176 | /* type rightshift |
| 177 | size |
| 178 | bitsize |
| 179 | pc-relative |
| 180 | bitpos |
| 181 | absolute |
| 182 | complain_on_overflow |
| 183 | special_function |
| 184 | relocation name |
| 185 | partial_inplace |
| 186 | src_mask |
| 187 | */ |
| 188 | |
| 189 | /*FIXME: I'm not real sure about this table */ |
| 190 | #define NA 0 /* Obsolete fields, via the documentation */ |
| 191 | static reloc_howto_type howto_table[] = |
| 192 | { |
| 193 | {R_ABS, 0, 3, NA, false, NA, NA, true,a29k_reloc,"ABS", true, 0xffffffff,0xffffffff, false}, |
| 194 | {1}, {2}, {3}, {4}, {5}, {6}, {7}, {8}, {9}, {10}, |
| 195 | {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20}, |
| 196 | {21}, {22}, {23}, |
| 197 | {R_IREL, 0, 3, NA, true, NA, NA, true,a29k_reloc,"IREL", true, 0xffffffff,0xffffffff, false}, |
| 198 | {R_IABS, 0, 3, NA, false, NA, NA, true,a29k_reloc,"IABS", true, 0xffffffff,0xffffffff, false}, |
| 199 | {R_ILOHALF, 0, 3, NA, true, NA, NA, true,a29k_reloc,"ILOHALF", true, 0x0000ffff,0x0000ffff, false}, |
| 200 | {R_IHIHALF, 0, 3, NA, true, NA, NA, true,a29k_reloc,"IHIHALF", true, 0xffff0000,0xffff0000, false}, |
| 201 | {R_IHCONST, 0, 3, NA, true, NA, NA, true,a29k_reloc,"IHCONST", true, 0xffff0000,0xffff0000, false}, |
| 202 | {R_BYTE, 0, 0, NA, false, NA, NA, true,a29k_reloc,"BYTE", true, 0x000000ff,0x000000ff, false}, |
| 203 | {R_HWORD, 0, 1, NA, false, NA, NA, true,a29k_reloc,"HWORD", true, 0x0000ffff,0x0000ffff, false}, |
| 204 | {R_WORD, 0, 2, NA, false, NA, NA, true,a29k_reloc,"WORD", true, 0xffffffff,0xffffffff, false}, |
| 205 | }; |
| 206 | #undef NA |
| 207 | |
| 208 | #define BADMAG(x) A29KBADMAG(x) |
| 209 | |
| 210 | #include "coffcode.h" |
| 211 | |
| 212 | bfd_target a29kcoff_big_vec = |
| 213 | { |
| 214 | "coff-a29k-big", /* name */ |
| 215 | bfd_target_coff_flavour_enum, |
| 216 | true, /* data byte order is big */ |
| 217 | true, /* header byte order is big */ |
| 218 | |
| 219 | (HAS_RELOC | EXEC_P | /* object flags */ |
| 220 | HAS_LINENO | HAS_DEBUG | |
| 221 | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT), |
| 222 | |
| 223 | (SEC_HAS_CONTENTS | SEC_ALLOC /* section flags */ |
| 224 | | SEC_LOAD | SEC_RELOC |
| 225 | | SEC_READONLY ), |
| 226 | '/', /* ar_pad_char */ |
| 227 | 15, /* ar_max_namelen */ |
| 228 | |
| 229 | 3, /* minimum section alignment */ |
| 230 | _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */ |
| 231 | _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */ |
| 232 | |
| 233 | |
| 234 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
| 235 | bfd_generic_archive_p, _bfd_dummy_target}, |
| 236 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ |
| 237 | bfd_false}, |
| 238 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ |
| 239 | _bfd_write_archive_contents, bfd_false}, |
| 240 | |
| 241 | JUMP_TABLE(coff), |
| 242 | COFF_SWAP_TABLE |
| 243 | }; |
| 244 | |