coff-z8k.c revision 1.10
1 /* BFD back-end for Zilog Z800n COFF binaries. 2 Copyright (C) 1992-2025 Free Software Foundation, Inc. 3 Contributed by Cygnus Support. 4 Written by Steve Chamberlain, <sac (at) cygnus.com>. 5 6 This file is part of BFD, the Binary File Descriptor library. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 21 MA 02110-1301, USA. */ 22 23 #include "sysdep.h" 24 #include "bfd.h" 25 #include "libbfd.h" 26 #include "bfdlink.h" 27 #include "coff/z8k.h" 28 #include "coff/internal.h" 29 #include "libcoff.h" 30 31 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1) 32 33 static reloc_howto_type r_imm32 = 34 HOWTO (R_IMM32, 0, 4, 32, false, 0, 35 complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff, 36 0xffffffff, false); 37 38 static reloc_howto_type r_imm4l = 39 HOWTO (R_IMM4L, 0, 1, 4, false, 0, 40 complain_overflow_bitfield, 0, "r_imm4l", true, 0xf, 0xf, false); 41 42 static reloc_howto_type r_da = 43 HOWTO (R_IMM16, 0, 2, 16, false, 0, 44 complain_overflow_bitfield, 0, "r_da", true, 0x0000ffff, 0x0000ffff, 45 false); 46 47 static reloc_howto_type r_imm8 = 48 HOWTO (R_IMM8, 0, 1, 8, false, 0, 49 complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff, 50 false); 51 52 static reloc_howto_type r_rel16 = 53 HOWTO (R_REL16, 0, 2, 16, false, 0, 54 complain_overflow_bitfield, 0, "r_rel16", true, 0x0000ffff, 0x0000ffff, 55 true); 56 57 static reloc_howto_type r_jr = 58 HOWTO (R_JR, 1, 1, 8, true, 0, complain_overflow_signed, 0, 59 "r_jr", true, 0xff, 0xff, true); 60 61 static reloc_howto_type r_disp7 = 62 HOWTO (R_DISP7, 0, 1, 7, true, 0, complain_overflow_bitfield, 0, 63 "r_disp7", true, 0x7f, 0x7f, true); 64 65 static reloc_howto_type r_callr = 66 HOWTO (R_CALLR, 1, 2, 12, true, 0, complain_overflow_signed, 0, 67 "r_callr", true, 0xfff, 0xfff, true); 68 69 #define BADMAG(x) Z8KBADMAG(x) 70 #define Z8K 1 /* Customize coffcode.h. */ 71 #define __A_MAGIC_SET__ 72 73 /* Code to swap in the reloc. */ 74 #define SWAP_IN_RELOC_OFFSET H_GET_32 75 #define SWAP_OUT_RELOC_OFFSET H_PUT_32 76 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ 77 dst->r_stuff[0] = 'S'; \ 78 dst->r_stuff[1] = 'C'; 79 80 /* Code to turn a r_type into a howto ptr, uses the above howto table. */ 81 82 static void 83 rtype2howto (arelent *internal, struct internal_reloc *dst) 84 { 85 switch (dst->r_type) 86 { 87 default: 88 internal->howto = NULL; 89 break; 90 case R_IMM8: 91 internal->howto = &r_imm8; 92 break; 93 case R_IMM16: 94 internal->howto = &r_da; 95 break; 96 case R_JR: 97 internal->howto = &r_jr; 98 break; 99 case R_DISP7: 100 internal->howto = &r_disp7; 101 break; 102 case R_CALLR: 103 internal->howto = &r_callr; 104 break; 105 case R_REL16: 106 internal->howto = &r_rel16; 107 break; 108 case R_IMM32: 109 internal->howto = &r_imm32; 110 break; 111 case R_IMM4L: 112 internal->howto = &r_imm4l; 113 break; 114 } 115 } 116 117 #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry) 118 119 static reloc_howto_type * 120 coff_z8k_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 121 bfd_reloc_code_real_type code) 122 { 123 switch (code) 124 { 125 case BFD_RELOC_8: return & r_imm8; 126 case BFD_RELOC_16: return & r_da; 127 case BFD_RELOC_32: return & r_imm32; 128 case BFD_RELOC_8_PCREL: return & r_jr; 129 case BFD_RELOC_16_PCREL: return & r_rel16; 130 case BFD_RELOC_Z8K_DISP7: return & r_disp7; 131 case BFD_RELOC_Z8K_CALLR: return & r_callr; 132 case BFD_RELOC_Z8K_IMM4L: return & r_imm4l; 133 default: BFD_FAIL (); 134 return 0; 135 } 136 } 137 138 static reloc_howto_type * 139 coff_z8k_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 140 const char *r_name) 141 { 142 if (strcasecmp (r_imm8.name, r_name) == 0) 143 return &r_imm8; 144 if (strcasecmp (r_da.name, r_name) == 0) 145 return &r_da; 146 if (strcasecmp (r_imm32.name, r_name) == 0) 147 return &r_imm32; 148 if (strcasecmp (r_jr.name, r_name) == 0) 149 return &r_jr; 150 if (strcasecmp (r_rel16.name, r_name) == 0) 151 return &r_rel16; 152 if (strcasecmp (r_disp7.name, r_name) == 0) 153 return &r_disp7; 154 if (strcasecmp (r_callr.name, r_name) == 0) 155 return &r_callr; 156 if (strcasecmp (r_imm4l.name, r_name) == 0) 157 return &r_imm4l; 158 159 return NULL; 160 } 161 162 /* Perform any necessary magic to the addend in a reloc entry. */ 163 164 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \ 165 cache_ptr->addend = ext_reloc.r_offset; 166 167 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ 168 reloc_processing(relent, reloc, symbols, abfd, section) 169 170 static void 171 reloc_processing (arelent *relent, 172 struct internal_reloc *reloc, 173 asymbol **symbols, 174 bfd *abfd, 175 asection *section) 176 { 177 relent->address = reloc->r_vaddr; 178 rtype2howto (relent, reloc); 179 180 if (reloc->r_symndx == -1 || symbols == NULL) 181 relent->sym_ptr_ptr = &bfd_abs_section_ptr->symbol; 182 else if (reloc->r_symndx >= 0 && reloc->r_symndx < obj_conv_table_size (abfd)) 183 relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; 184 else 185 { 186 _bfd_error_handler 187 /* xgettext:c-format */ 188 (_("%pB: warning: illegal symbol index %ld in relocs"), 189 abfd, reloc->r_symndx); 190 relent->sym_ptr_ptr = &bfd_abs_section_ptr->symbol; 191 } 192 relent->addend = reloc->r_offset; 193 relent->address -= section->vma; 194 } 195 196 static bool 197 extra_case (bfd *in_abfd, 198 struct bfd_link_info *link_info, 199 struct bfd_link_order *link_order, 200 arelent *reloc, 201 bfd_byte *data, 202 size_t *src_ptr, 203 size_t *dst_ptr) 204 { 205 asection * input_section = link_order->u.indirect.section; 206 bfd_size_type end = bfd_get_section_limit_octets (in_abfd, input_section); 207 bfd_size_type reloc_size = bfd_get_reloc_size (reloc->howto); 208 209 if (*src_ptr > end 210 || reloc_size > end - *src_ptr) 211 { 212 link_info->callbacks->einfo 213 /* xgettext:c-format */ 214 (_("%X%P: %pB(%pA): relocation \"%pR\" goes out of range\n"), 215 in_abfd, input_section, reloc); 216 return false; 217 } 218 219 switch (reloc->howto->type) 220 { 221 case R_IMM8: 222 bfd_put_8 (in_abfd, 223 bfd_coff_reloc16_get_value (reloc, link_info, input_section), 224 data + *dst_ptr); 225 *dst_ptr += 1; 226 *src_ptr += 1; 227 break; 228 229 case R_IMM32: 230 /* If no flags are set, assume immediate value. */ 231 if (! (*reloc->sym_ptr_ptr)->section->flags) 232 { 233 bfd_put_32 (in_abfd, 234 bfd_coff_reloc16_get_value (reloc, link_info, 235 input_section), 236 data + *dst_ptr); 237 } 238 else 239 { 240 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 241 input_section); 242 /* Addresses are 23 bit, and the layout of those in a 32-bit 243 value is as follows: 244 1AAAAAAA xxxxxxxx AAAAAAAA AAAAAAAA 245 (A - address bits, x - ignore). */ 246 dst = (dst & 0xffff) | ((dst & 0xff0000) << 8) | 0x80000000; 247 bfd_put_32 (in_abfd, dst, data + *dst_ptr); 248 } 249 *dst_ptr += 4; 250 *src_ptr += 4; 251 break; 252 253 case R_IMM4L: 254 bfd_put_8 (in_abfd, 255 ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0) 256 | (0x0f & bfd_coff_reloc16_get_value (reloc, link_info, 257 input_section))), 258 data + *dst_ptr); 259 *dst_ptr += 1; 260 *src_ptr += 1; 261 break; 262 263 case R_IMM16: 264 bfd_put_16 (in_abfd, 265 bfd_coff_reloc16_get_value (reloc, link_info, input_section), 266 data + *dst_ptr); 267 *dst_ptr += 2; 268 *src_ptr += 2; 269 break; 270 271 case R_JR: 272 { 273 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 274 input_section); 275 bfd_vma dot = (*dst_ptr 276 + input_section->output_offset 277 + input_section->output_section->vma); 278 /* -1, since we're in the odd byte of the word and the pc has 279 been incremented. */ 280 bfd_signed_vma gap = dst - dot - 1; 281 282 if ((gap & 1) != 0 || gap > 254 || gap < -256) 283 { 284 link_info->callbacks->reloc_overflow 285 (link_info, NULL, bfd_asymbol_name (*reloc->sym_ptr_ptr), 286 reloc->howto->name, reloc->addend, input_section->owner, 287 input_section, reloc->address); 288 return false; 289 } 290 291 bfd_put_8 (in_abfd, gap / 2, data + *dst_ptr); 292 *dst_ptr += 1; 293 *src_ptr += 1; 294 break; 295 } 296 297 case R_DISP7: 298 { 299 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 300 input_section); 301 bfd_vma dot = (*dst_ptr 302 + input_section->output_offset 303 + input_section->output_section->vma); 304 bfd_signed_vma gap = dst - dot - 1; 305 306 if ((gap & 1) != 0 || gap > 0 || gap < -254) 307 { 308 link_info->callbacks->reloc_overflow 309 (link_info, NULL, bfd_asymbol_name (*reloc->sym_ptr_ptr), 310 reloc->howto->name, reloc->addend, input_section->owner, 311 input_section, reloc->address); 312 return false; 313 } 314 315 bfd_put_8 (in_abfd, 316 ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0x80) 317 + (-gap / 2 & 0x7f)), 318 data + *dst_ptr); 319 *dst_ptr += 1; 320 *src_ptr += 1; 321 break; 322 } 323 324 case R_CALLR: 325 { 326 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 327 input_section); 328 bfd_vma dot = (*dst_ptr 329 + input_section->output_offset 330 + input_section->output_section->vma); 331 bfd_signed_vma gap = dst - dot - 2; 332 333 if ((gap & 1) != 0 || gap > 4096 || gap < -4095) 334 { 335 link_info->callbacks->reloc_overflow 336 (link_info, NULL, bfd_asymbol_name (*reloc->sym_ptr_ptr), 337 reloc->howto->name, reloc->addend, input_section->owner, 338 input_section, reloc->address); 339 return false; 340 } 341 342 bfd_put_16 (in_abfd, 343 ((bfd_get_16 (in_abfd, data + *dst_ptr) & 0xf000) 344 | (-gap / 2 & 0x0fff)), 345 data + *dst_ptr); 346 *dst_ptr += 2; 347 *src_ptr += 2; 348 break; 349 } 350 351 case R_REL16: 352 { 353 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 354 input_section); 355 bfd_vma dot = (*dst_ptr 356 + input_section->output_offset 357 + input_section->output_section->vma); 358 bfd_signed_vma gap = dst - dot - 2; 359 360 if (gap > 32767 || gap < -32768) 361 { 362 link_info->callbacks->reloc_overflow 363 (link_info, NULL, bfd_asymbol_name (*reloc->sym_ptr_ptr), 364 reloc->howto->name, reloc->addend, input_section->owner, 365 input_section, reloc->address); 366 return false; 367 } 368 369 bfd_put_16 (in_abfd, gap, data + *dst_ptr); 370 *dst_ptr += 2; 371 *src_ptr += 2; 372 break; 373 } 374 375 default: 376 link_info->callbacks->einfo 377 /* xgettext:c-format */ 378 (_("%X%P: %pB(%pA): relocation \"%pR\" is not supported\n"), 379 in_abfd, input_section, reloc); 380 return false; 381 } 382 return true; 383 } 384 385 #define coff_reloc16_extra_cases extra_case 386 #define coff_bfd_reloc_type_lookup coff_z8k_reloc_type_lookup 387 #define coff_bfd_reloc_name_lookup coff_z8k_reloc_name_lookup 388 389 #ifndef bfd_pe_print_pdata 390 #define bfd_pe_print_pdata NULL 391 #endif 392 393 #include "coffcode.h" 394 395 #undef coff_bfd_get_relocated_section_contents 396 #define coff_bfd_get_relocated_section_contents \ 397 bfd_coff_reloc16_get_relocated_section_contents 398 399 #undef coff_bfd_relax_section 400 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section 401 402 CREATE_BIG_COFF_TARGET_VEC (z8k_coff_vec, "coff-z8k", 0, 0, '_', NULL, COFF_SWAP_TABLE) 403
Indexes created Wed Apr 22 00:22:44 UTC 2026