coff-z8k.c revision 1.1
1 /* BFD back-end for Zilog Z800n COFF binaries. 2 Copyright 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003, 3 2004, 2005, 2007, 2008 Free Software Foundation, Inc. 4 Contributed by Cygnus Support. 5 Written by Steve Chamberlain, <sac (at) cygnus.com>. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 22 MA 02110-1301, USA. */ 23 24 #include "sysdep.h" 25 #include "bfd.h" 26 #include "libbfd.h" 27 #include "bfdlink.h" 28 #include "coff/z8k.h" 29 #include "coff/internal.h" 30 #include "libcoff.h" 31 32 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1) 33 34 static reloc_howto_type r_imm32 = 35 HOWTO (R_IMM32, 0, 2, 32, FALSE, 0, 36 complain_overflow_bitfield, 0, "r_imm32", TRUE, 0xffffffff, 37 0xffffffff, FALSE); 38 39 static reloc_howto_type r_imm4l = 40 HOWTO (R_IMM4L, 0, 0, 4, FALSE, 0, 41 complain_overflow_bitfield, 0, "r_imm4l", TRUE, 0xf, 0xf, FALSE); 42 43 static reloc_howto_type r_da = 44 HOWTO (R_IMM16, 0, 1, 16, FALSE, 0, 45 complain_overflow_bitfield, 0, "r_da", TRUE, 0x0000ffff, 0x0000ffff, 46 FALSE); 47 48 static reloc_howto_type r_imm8 = 49 HOWTO (R_IMM8, 0, 0, 8, FALSE, 0, 50 complain_overflow_bitfield, 0, "r_imm8", TRUE, 0x000000ff, 0x000000ff, 51 FALSE); 52 53 static reloc_howto_type r_rel16 = 54 HOWTO (R_REL16, 0, 1, 16, FALSE, 0, 55 complain_overflow_bitfield, 0, "r_rel16", TRUE, 0x0000ffff, 0x0000ffff, 56 TRUE); 57 58 static reloc_howto_type r_jr = 59 HOWTO (R_JR, 1, 0, 8, TRUE, 0, complain_overflow_signed, 0, 60 "r_jr", TRUE, 0xff, 0xff, TRUE); 61 62 static reloc_howto_type r_disp7 = 63 HOWTO (R_DISP7, 0, 0, 7, TRUE, 0, complain_overflow_bitfield, 0, 64 "r_disp7", TRUE, 0x7f, 0x7f, TRUE); 65 66 static reloc_howto_type r_callr = 67 HOWTO (R_CALLR, 1, 1, 12, TRUE, 0, complain_overflow_signed, 0, 68 "r_callr", TRUE, 0xfff, 0xfff, TRUE); 69 70 #define BADMAG(x) Z8KBADMAG(x) 71 #define Z8K 1 /* Customize coffcode.h. */ 72 #define __A_MAGIC_SET__ 73 74 /* Code to swap in the reloc. */ 75 #define SWAP_IN_RELOC_OFFSET H_GET_32 76 #define SWAP_OUT_RELOC_OFFSET H_PUT_32 77 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ 78 dst->r_stuff[0] = 'S'; \ 79 dst->r_stuff[1] = 'C'; 80 81 /* Code to turn a r_type into a howto ptr, uses the above howto table. */ 82 83 static void 84 rtype2howto (arelent *internal, struct internal_reloc *dst) 85 { 86 switch (dst->r_type) 87 { 88 default: 89 abort (); 90 break; 91 case R_IMM8: 92 internal->howto = &r_imm8; 93 break; 94 case R_IMM16: 95 internal->howto = &r_da; 96 break; 97 case R_JR: 98 internal->howto = &r_jr; 99 break; 100 case R_DISP7: 101 internal->howto = &r_disp7; 102 break; 103 case R_CALLR: 104 internal->howto = &r_callr; 105 break; 106 case R_REL16: 107 internal->howto = &r_rel16; 108 break; 109 case R_IMM32: 110 internal->howto = &r_imm32; 111 break; 112 case R_IMM4L: 113 internal->howto = &r_imm4l; 114 break; 115 } 116 } 117 118 #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry) 119 120 static reloc_howto_type * 121 coff_z8k_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 122 bfd_reloc_code_real_type code) 123 { 124 switch (code) 125 { 126 case BFD_RELOC_8: return & r_imm8; 127 case BFD_RELOC_16: return & r_da; 128 case BFD_RELOC_32: return & r_imm32; 129 case BFD_RELOC_8_PCREL: return & r_jr; 130 case BFD_RELOC_16_PCREL: return & r_rel16; 131 case BFD_RELOC_Z8K_DISP7: return & r_disp7; 132 case BFD_RELOC_Z8K_CALLR: return & r_callr; 133 case BFD_RELOC_Z8K_IMM4L: return & r_imm4l; 134 default: BFD_FAIL (); 135 return 0; 136 } 137 } 138 139 static reloc_howto_type * 140 coff_z8k_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 141 const char *r_name) 142 { 143 if (strcasecmp (r_imm8.name, r_name) == 0) 144 return &r_imm8; 145 if (strcasecmp (r_da.name, r_name) == 0) 146 return &r_da; 147 if (strcasecmp (r_imm32.name, r_name) == 0) 148 return &r_imm32; 149 if (strcasecmp (r_jr.name, r_name) == 0) 150 return &r_jr; 151 if (strcasecmp (r_rel16.name, r_name) == 0) 152 return &r_rel16; 153 if (strcasecmp (r_disp7.name, r_name) == 0) 154 return &r_disp7; 155 if (strcasecmp (r_callr.name, r_name) == 0) 156 return &r_callr; 157 if (strcasecmp (r_imm4l.name, r_name) == 0) 158 return &r_imm4l; 159 160 return NULL; 161 } 162 163 /* Perform any necessary magic to the addend in a reloc entry. */ 164 165 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \ 166 cache_ptr->addend = ext_reloc.r_offset; 167 168 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ 169 reloc_processing(relent, reloc, symbols, abfd, section) 170 171 static void 172 reloc_processing (arelent *relent, 173 struct internal_reloc *reloc, 174 asymbol **symbols, 175 bfd *abfd, 176 asection *section) 177 { 178 relent->address = reloc->r_vaddr; 179 rtype2howto (relent, reloc); 180 181 if (reloc->r_symndx > 0) 182 relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; 183 else 184 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; 185 186 relent->addend = reloc->r_offset; 187 relent->address -= section->vma; 188 } 189 190 static void 191 extra_case (bfd *in_abfd, 192 struct bfd_link_info *link_info, 193 struct bfd_link_order *link_order, 194 arelent *reloc, 195 bfd_byte *data, 196 unsigned int *src_ptr, 197 unsigned int *dst_ptr) 198 { 199 asection * input_section = link_order->u.indirect.section; 200 201 switch (reloc->howto->type) 202 { 203 case R_IMM8: 204 bfd_put_8 (in_abfd, 205 bfd_coff_reloc16_get_value (reloc, link_info, input_section), 206 data + *dst_ptr); 207 (*dst_ptr) += 1; 208 (*src_ptr) += 1; 209 break; 210 211 case R_IMM32: 212 /* If no flags are set, assume immediate value. */ 213 if (! (*reloc->sym_ptr_ptr)->section->flags) 214 { 215 bfd_put_32 (in_abfd, 216 bfd_coff_reloc16_get_value (reloc, link_info, 217 input_section), 218 data + *dst_ptr); 219 } 220 else 221 { 222 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 223 input_section); 224 /* Addresses are 23 bit, and the layout of those in a 32-bit 225 value is as follows: 226 1AAAAAAA xxxxxxxx AAAAAAAA AAAAAAAA 227 (A - address bits, x - ignore). */ 228 dst = (dst & 0xffff) | ((dst & 0xff0000) << 8) | 0x80000000; 229 bfd_put_32 (in_abfd, dst, data + *dst_ptr); 230 } 231 (*dst_ptr) += 4; 232 (*src_ptr) += 4; 233 break; 234 235 case R_IMM4L: 236 bfd_put_8 (in_abfd, 237 ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0) 238 | (0x0f 239 & bfd_coff_reloc16_get_value (reloc, link_info, 240 input_section))), 241 data + *dst_ptr); 242 (*dst_ptr) += 1; 243 (*src_ptr) += 1; 244 break; 245 246 case R_IMM16: 247 bfd_put_16 (in_abfd, 248 bfd_coff_reloc16_get_value (reloc, link_info, input_section), 249 data + *dst_ptr); 250 (*dst_ptr) += 2; 251 (*src_ptr) += 2; 252 break; 253 254 case R_JR: 255 { 256 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 257 input_section); 258 bfd_vma dot = (*dst_ptr 259 + input_section->output_offset 260 + input_section->output_section->vma); 261 int gap = dst - dot - 1; /* -1, since we're in the odd byte of the 262 word and the pc's been incremented. */ 263 264 if (gap & 1) 265 abort (); 266 gap /= 2; 267 if (gap > 128 || gap < -128) 268 { 269 if (! ((*link_info->callbacks->reloc_overflow) 270 (link_info, NULL, 271 bfd_asymbol_name (*reloc->sym_ptr_ptr), 272 reloc->howto->name, reloc->addend, input_section->owner, 273 input_section, reloc->address))) 274 abort (); 275 } 276 bfd_put_8 (in_abfd, gap, data + *dst_ptr); 277 (*dst_ptr)++; 278 (*src_ptr)++; 279 break; 280 } 281 282 case R_DISP7: 283 { 284 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 285 input_section); 286 bfd_vma dot = (*dst_ptr 287 + input_section->output_offset 288 + input_section->output_section->vma); 289 int gap = dst - dot - 1; /* -1, since we're in the odd byte of the 290 word and the pc's been incremented. */ 291 292 if (gap & 1) 293 abort (); 294 gap /= 2; 295 296 if (gap > 0 || gap < -127) 297 { 298 if (! ((*link_info->callbacks->reloc_overflow) 299 (link_info, NULL, 300 bfd_asymbol_name (*reloc->sym_ptr_ptr), 301 reloc->howto->name, reloc->addend, input_section->owner, 302 input_section, reloc->address))) 303 abort (); 304 } 305 bfd_put_8 (in_abfd, 306 (bfd_get_8 ( in_abfd, data + *dst_ptr) & 0x80) + (-gap & 0x7f), 307 data + *dst_ptr); 308 (*dst_ptr)++; 309 (*src_ptr)++; 310 break; 311 } 312 313 case R_CALLR: 314 { 315 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 316 input_section); 317 bfd_vma dot = (*dst_ptr 318 + input_section->output_offset 319 + input_section->output_section->vma); 320 int gap = dst - dot - 2; 321 322 if (gap & 1) 323 abort (); 324 if (gap > 4096 || gap < -4095) 325 { 326 if (! ((*link_info->callbacks->reloc_overflow) 327 (link_info, NULL, 328 bfd_asymbol_name (*reloc->sym_ptr_ptr), 329 reloc->howto->name, reloc->addend, input_section->owner, 330 input_section, reloc->address))) 331 abort (); 332 } 333 gap /= 2; 334 bfd_put_16 (in_abfd, 335 (bfd_get_16 ( in_abfd, data + *dst_ptr) & 0xf000) | (-gap & 0x0fff), 336 data + *dst_ptr); 337 (*dst_ptr) += 2; 338 (*src_ptr) += 2; 339 break; 340 } 341 342 case R_REL16: 343 { 344 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 345 input_section); 346 bfd_vma dot = (*dst_ptr 347 + input_section->output_offset 348 + input_section->output_section->vma); 349 int gap = dst - dot - 2; 350 351 if (gap > 32767 || gap < -32768) 352 { 353 if (! ((*link_info->callbacks->reloc_overflow) 354 (link_info, NULL, 355 bfd_asymbol_name (*reloc->sym_ptr_ptr), 356 reloc->howto->name, reloc->addend, input_section->owner, 357 input_section, reloc->address))) 358 abort (); 359 } 360 bfd_put_16 (in_abfd, (bfd_vma) gap, data + *dst_ptr); 361 (*dst_ptr) += 2; 362 (*src_ptr) += 2; 363 break; 364 } 365 366 default: 367 abort (); 368 } 369 } 370 371 #define coff_reloc16_extra_cases extra_case 372 #define coff_bfd_reloc_type_lookup coff_z8k_reloc_type_lookup 373 #define coff_bfd_reloc_name_lookup coff_z8k_reloc_name_lookup 374 375 #ifndef bfd_pe_print_pdata 376 #define bfd_pe_print_pdata NULL 377 #endif 378 379 #include "coffcode.h" 380 381 #undef coff_bfd_get_relocated_section_contents 382 #define coff_bfd_get_relocated_section_contents \ 383 bfd_coff_reloc16_get_relocated_section_contents 384 385 #undef coff_bfd_relax_section 386 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section 387 388 CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL, COFF_SWAP_TABLE) 389
Indexes created Wed Apr 22 00:22:44 UTC 2026