1/* BFD back-end for Zilog Z800n COFF binaries. 2 Copyright 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003, 3 2004, 2005 Free Software Foundation, Inc. 4 Contributed by Cygnus Support. 5 Written by Steve Chamberlain, <sac@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 2 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, MA 02110-1301, USA. */ 22 23#include "bfd.h" 24#include "sysdep.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 33static reloc_howto_type r_imm32 = 34HOWTO (R_IMM32, 0, 2, 32, FALSE, 0, 35 complain_overflow_bitfield, 0, "r_imm32", TRUE, 0xffffffff, 36 0xffffffff, FALSE); 37 38static reloc_howto_type r_imm4l = 39HOWTO (R_IMM4L, 0, 0, 4, FALSE, 0, 40 complain_overflow_bitfield, 0, "r_imm4l", TRUE, 0xf, 0xf, FALSE); 41 42static reloc_howto_type r_da = 43HOWTO (R_IMM16, 0, 1, 16, FALSE, 0, 44 complain_overflow_bitfield, 0, "r_da", TRUE, 0x0000ffff, 0x0000ffff, 45 FALSE); 46 47static reloc_howto_type r_imm8 = 48HOWTO (R_IMM8, 0, 0, 8, FALSE, 0, 49 complain_overflow_bitfield, 0, "r_imm8", TRUE, 0x000000ff, 0x000000ff, 50 FALSE); 51 52static reloc_howto_type r_rel16 = 53HOWTO (R_REL16, 0, 1, 16, FALSE, 0, 54 complain_overflow_bitfield, 0, "r_rel16", TRUE, 0x0000ffff, 0x0000ffff, 55 TRUE); 56 57static reloc_howto_type r_jr = 58HOWTO (R_JR, 1, 0, 8, TRUE, 0, complain_overflow_signed, 0, 59 "r_jr", TRUE, 0xff, 0xff, TRUE); 60 61static reloc_howto_type r_disp7 = 62HOWTO (R_DISP7, 0, 0, 7, TRUE, 0, complain_overflow_bitfield, 0, 63 "r_disp7", TRUE, 0x7f, 0x7f, TRUE); 64 65static reloc_howto_type r_callr = 66HOWTO (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 82static void 83rtype2howto (arelent *internal, struct internal_reloc *dst) 84{ 85 switch (dst->r_type) 86 { 87 default: 88 abort (); 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 119static reloc_howto_type * 120coff_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/* Perform any necessary magic to the addend in a reloc entry. */ 139 140#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \ 141 cache_ptr->addend = ext_reloc.r_offset; 142 143#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ 144 reloc_processing(relent, reloc, symbols, abfd, section) 145 146static void 147reloc_processing (arelent *relent, 148 struct internal_reloc *reloc, 149 asymbol **symbols, 150 bfd *abfd, 151 asection *section) 152{ 153 relent->address = reloc->r_vaddr; 154 rtype2howto (relent, reloc); 155 156 if (reloc->r_symndx > 0) 157 relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; 158 else 159 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; 160 161 relent->addend = reloc->r_offset; 162 relent->address -= section->vma; 163} 164 165static void 166extra_case (bfd *in_abfd, 167 struct bfd_link_info *link_info, 168 struct bfd_link_order *link_order, 169 arelent *reloc, 170 bfd_byte *data, 171 unsigned int *src_ptr, 172 unsigned int *dst_ptr) 173{ 174 asection * input_section = link_order->u.indirect.section; 175 176 switch (reloc->howto->type) 177 { 178 case R_IMM8: 179 bfd_put_8 (in_abfd, 180 bfd_coff_reloc16_get_value (reloc, link_info, input_section), 181 data + *dst_ptr); 182 (*dst_ptr) += 1; 183 (*src_ptr) += 1; 184 break; 185 186 case R_IMM32: 187 /* If no flags are set, assume immediate value. */ 188 if (! (*reloc->sym_ptr_ptr)->section->flags) 189 { 190 bfd_put_32 (in_abfd, 191 bfd_coff_reloc16_get_value (reloc, link_info, 192 input_section), 193 data + *dst_ptr); 194 } 195 else 196 { 197 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 198 input_section); 199 /* Addresses are 23 bit, and the layout of those in a 32-bit 200 value is as follows: 201 1AAAAAAA xxxxxxxx AAAAAAAA AAAAAAAA 202 (A - address bits, x - ignore). */ 203 dst = (dst & 0xffff) | ((dst & 0xff0000) << 8) | 0x80000000; 204 bfd_put_32 (in_abfd, dst, data + *dst_ptr); 205 } 206 (*dst_ptr) += 4; 207 (*src_ptr) += 4; 208 break; 209 210 case R_IMM4L: 211 bfd_put_8 (in_abfd, 212 ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0) 213 | (0x0f 214 & bfd_coff_reloc16_get_value (reloc, link_info, 215 input_section))), 216 data + *dst_ptr); 217 (*dst_ptr) += 1; 218 (*src_ptr) += 1; 219 break; 220 221 case R_IMM16: 222 bfd_put_16 (in_abfd, 223 bfd_coff_reloc16_get_value (reloc, link_info, input_section), 224 data + *dst_ptr); 225 (*dst_ptr) += 2; 226 (*src_ptr) += 2; 227 break; 228 229 case R_JR: 230 { 231 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 232 input_section); 233 bfd_vma dot = (*dst_ptr 234 + input_section->output_offset 235 + input_section->output_section->vma); 236 int gap = dst - dot - 1; /* -1, since we're in the odd byte of the 237 word and the pc's been incremented. */ 238 239 if (gap & 1) 240 abort (); 241 gap /= 2; 242 if (gap > 128 || gap < -128) 243 { 244 if (! ((*link_info->callbacks->reloc_overflow) 245 (link_info, NULL, 246 bfd_asymbol_name (*reloc->sym_ptr_ptr), 247 reloc->howto->name, reloc->addend, input_section->owner, 248 input_section, reloc->address))) 249 abort (); 250 } 251 bfd_put_8 (in_abfd, gap, data + *dst_ptr); 252 (*dst_ptr)++; 253 (*src_ptr)++; 254 break; 255 } 256 257 case R_DISP7: 258 { 259 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 260 input_section); 261 bfd_vma dot = (*dst_ptr 262 + input_section->output_offset 263 + input_section->output_section->vma); 264 int gap = dst - dot - 1; /* -1, since we're in the odd byte of the 265 word and the pc's been incremented. */ 266 267 if (gap & 1) 268 abort (); 269 gap /= 2; 270 271 if (gap > 0 || gap < -127) 272 { 273 if (! ((*link_info->callbacks->reloc_overflow) 274 (link_info, NULL, 275 bfd_asymbol_name (*reloc->sym_ptr_ptr), 276 reloc->howto->name, reloc->addend, input_section->owner, 277 input_section, reloc->address))) 278 abort (); 279 } 280 bfd_put_8 (in_abfd, 281 (bfd_get_8 ( in_abfd, data + *dst_ptr) & 0x80) + (-gap & 0x7f), 282 data + *dst_ptr); 283 (*dst_ptr)++; 284 (*src_ptr)++; 285 break; 286 } 287 288 case R_CALLR: 289 { 290 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 291 input_section); 292 bfd_vma dot = (*dst_ptr 293 + input_section->output_offset 294 + input_section->output_section->vma); 295 int gap = dst - dot - 2; 296 297 if (gap & 1) 298 abort (); 299 if (gap > 4096 || gap < -4095) 300 { 301 if (! ((*link_info->callbacks->reloc_overflow) 302 (link_info, NULL, 303 bfd_asymbol_name (*reloc->sym_ptr_ptr), 304 reloc->howto->name, reloc->addend, input_section->owner, 305 input_section, reloc->address))) 306 abort (); 307 } 308 gap /= 2; 309 bfd_put_16 (in_abfd, 310 (bfd_get_16 ( in_abfd, data + *dst_ptr) & 0xf000) | (-gap & 0x0fff), 311 data + *dst_ptr); 312 (*dst_ptr) += 2; 313 (*src_ptr) += 2; 314 break; 315 } 316 317 case R_REL16: 318 { 319 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, 320 input_section); 321 bfd_vma dot = (*dst_ptr 322 + input_section->output_offset 323 + input_section->output_section->vma); 324 int gap = dst - dot - 2; 325 326 if (gap > 32767 || gap < -32768) 327 { 328 if (! ((*link_info->callbacks->reloc_overflow) 329 (link_info, NULL, 330 bfd_asymbol_name (*reloc->sym_ptr_ptr), 331 reloc->howto->name, reloc->addend, input_section->owner, 332 input_section, reloc->address))) 333 abort (); 334 } 335 bfd_put_16 (in_abfd, (bfd_vma) gap, data + *dst_ptr); 336 (*dst_ptr) += 2; 337 (*src_ptr) += 2; 338 break; 339 } 340 341 default: 342 abort (); 343 } 344} 345 346#define coff_reloc16_extra_cases extra_case 347#define coff_bfd_reloc_type_lookup coff_z8k_reloc_type_lookup 348 349#include "coffcode.h" 350 351#undef coff_bfd_get_relocated_section_contents 352#define coff_bfd_get_relocated_section_contents \ 353 bfd_coff_reloc16_get_relocated_section_contents 354 355#undef coff_bfd_relax_section 356#define coff_bfd_relax_section bfd_coff_reloc16_relax_section 357 358CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL, COFF_SWAP_TABLE) 359