1 /* BFD back-end for Zilog Z800n COFF binaries. 2 Copyright (C) 1992-2016 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, 2, 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, 0, 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, 1, 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, 0, 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, 1, 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, 0, 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, 0, 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, 1, 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 > 0) 181 relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; 182 else 183 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; 184 185 relent->addend = reloc->r_offset; 186 relent->address -= section->vma; 187 } 188 189 static void 190 extra_case (bfd *in_abfd, 191 struct bfd_link_info *link_info, 192 struct bfd_link_order *link_order, 193 arelent *reloc, 194 bfd_byte *data, 195 unsigned int *src_ptr, 196 unsigned int *dst_ptr) 197 { 198 asection * input_section = link_order->u.indirect.section; 199 200 switch (reloc->howto->type) 201 { 202 case R_IMM8: 203 bfd_put_8 (in_abfd, 204 bfd_coff_reloc16_get_value (reloc, link_info, input_section), 205 data + *dst_ptr); 206 (*dst_ptr) += 1; 207 (*src_ptr) += 1; 208 break; 209 210 case R_IMM32: 211 /* If no flags are set, assume immediate value. */ 212 if (! (*reloc->sym_ptr_ptr)->section->flags) 213 { 214 bfd_put_32 (in_abfd, 215 bfd_coff_reloc16_get_value (reloc, link_info, 216 input_section), 217 data + *dst_ptr); 218 } 219 else 220 { 221 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 222 input_section); 223 /* Addresses are 23 bit, and the layout of those in a 32-bit 224 value is as follows: 225 1AAAAAAA xxxxxxxx AAAAAAAA AAAAAAAA 226 (A - address bits, x - ignore). */ 227 dst = (dst & 0xffff) | ((dst & 0xff0000) << 8) | 0x80000000; 228 bfd_put_32 (in_abfd, dst, data + *dst_ptr); 229 } 230 (*dst_ptr) += 4; 231 (*src_ptr) += 4; 232 break; 233 234 case R_IMM4L: 235 bfd_put_8 (in_abfd, 236 ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0) 237 | (0x0f 238 & bfd_coff_reloc16_get_value (reloc, link_info, 239 input_section))), 240 data + *dst_ptr); 241 (*dst_ptr) += 1; 242 (*src_ptr) += 1; 243 break; 244 245 case R_IMM16: 246 bfd_put_16 (in_abfd, 247 bfd_coff_reloc16_get_value (reloc, link_info, input_section), 248 data + *dst_ptr); 249 (*dst_ptr) += 2; 250 (*src_ptr) += 2; 251 break; 252 253 case R_JR: 254 { 255 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 256 input_section); 257 bfd_vma dot = (*dst_ptr 258 + input_section->output_offset 259 + input_section->output_section->vma); 260 int gap = dst - dot - 1; /* -1, since we're in the odd byte of the 261 word and the pc's been incremented. */ 262 263 if (gap & 1) 264 abort (); 265 gap /= 2; 266 if (gap > 127 || gap < -128) 267 (*link_info->callbacks->reloc_overflow) 268 (link_info, NULL, bfd_asymbol_name (*reloc->sym_ptr_ptr), 269 reloc->howto->name, reloc->addend, input_section->owner, 270 input_section, reloc->address); 271 272 bfd_put_8 (in_abfd, gap, data + *dst_ptr); 273 (*dst_ptr)++; 274 (*src_ptr)++; 275 break; 276 } 277 278 case R_DISP7: 279 { 280 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 281 input_section); 282 bfd_vma dot = (*dst_ptr 283 + input_section->output_offset 284 + input_section->output_section->vma); 285 int gap = dst - dot - 1; /* -1, since we're in the odd byte of the 286 word and the pc's been incremented. */ 287 288 if (gap & 1) 289 abort (); 290 gap /= 2; 291 292 if (gap > 0 || gap < -127) 293 (*link_info->callbacks->reloc_overflow) 294 (link_info, NULL, bfd_asymbol_name (*reloc->sym_ptr_ptr), 295 reloc->howto->name, reloc->addend, input_section->owner, 296 input_section, reloc->address); 297 298 bfd_put_8 (in_abfd, 299 (bfd_get_8 ( in_abfd, data + *dst_ptr) & 0x80) + (-gap & 0x7f), 300 data + *dst_ptr); 301 (*dst_ptr)++; 302 (*src_ptr)++; 303 break; 304 } 305 306 case R_CALLR: 307 { 308 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 309 input_section); 310 bfd_vma dot = (*dst_ptr 311 + input_section->output_offset 312 + input_section->output_section->vma); 313 int gap = dst - dot - 2; 314 315 if (gap & 1) 316 abort (); 317 if (gap > 4096 || gap < -4095) 318 (*link_info->callbacks->reloc_overflow) 319 (link_info, NULL, bfd_asymbol_name (*reloc->sym_ptr_ptr), 320 reloc->howto->name, reloc->addend, input_section->owner, 321 input_section, reloc->address); 322 323 gap /= 2; 324 bfd_put_16 (in_abfd, 325 (bfd_get_16 ( in_abfd, data + *dst_ptr) & 0xf000) | (-gap & 0x0fff), 326 data + *dst_ptr); 327 (*dst_ptr) += 2; 328 (*src_ptr) += 2; 329 break; 330 } 331 332 case R_REL16: 333 { 334 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 335 input_section); 336 bfd_vma dot = (*dst_ptr 337 + input_section->output_offset 338 + input_section->output_section->vma); 339 int gap = dst - dot - 2; 340 341 if (gap > 32767 || gap < -32768) 342 (*link_info->callbacks->reloc_overflow) 343 (link_info, NULL, bfd_asymbol_name (*reloc->sym_ptr_ptr), 344 reloc->howto->name, reloc->addend, input_section->owner, 345 input_section, reloc->address); 346 347 bfd_put_16 (in_abfd, (bfd_vma) gap, data + *dst_ptr); 348 (*dst_ptr) += 2; 349 (*src_ptr) += 2; 350 break; 351 } 352 353 default: 354 abort (); 355 } 356 } 357 358 #define coff_reloc16_extra_cases extra_case 359 #define coff_bfd_reloc_type_lookup coff_z8k_reloc_type_lookup 360 #define coff_bfd_reloc_name_lookup coff_z8k_reloc_name_lookup 361 362 #ifndef bfd_pe_print_pdata 363 #define bfd_pe_print_pdata NULL 364 #endif 365 366 #include "coffcode.h" 367 368 #undef coff_bfd_get_relocated_section_contents 369 #define coff_bfd_get_relocated_section_contents \ 370 bfd_coff_reloc16_get_relocated_section_contents 371 372 #undef coff_bfd_relax_section 373 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section 374 375 CREATE_BIG_COFF_TARGET_VEC (z8k_coff_vec, "coff-z8k", 0, 0, '_', NULL, COFF_SWAP_TABLE) 376
