| 1 | /* BFD back-end for RISC iX (Acorn, arm) binaries. |
| 2 | Copyright (C) 1994-2015 Free Software Foundation, Inc. |
| 3 | Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org) |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | |
| 23 | /* RISC iX overloads the MAGIC field to indicate more than just the usual |
| 24 | [ZNO]MAGIC values. Also included are squeezing information and |
| 25 | shared library usage. */ |
| 26 | |
| 27 | /* The following come from the man page. */ |
| 28 | #define SHLIBLEN 60 |
| 29 | |
| 30 | #define MF_IMPURE 00200 |
| 31 | #define MF_SQUEEZED 01000 |
| 32 | #define MF_USES_SL 02000 |
| 33 | #define MF_IS_SL 04000 |
| 34 | |
| 35 | /* Common combinations. */ |
| 36 | |
| 37 | /* Demand load (impure text). */ |
| 38 | #define IMAGIC (MF_IMPURE | ZMAGIC) |
| 39 | |
| 40 | /* OMAGIC with large header. |
| 41 | May contain a ref to a shared lib required by the object. */ |
| 42 | #define SPOMAGIC (MF_USES_SL | OMAGIC) |
| 43 | |
| 44 | /* A reference to a shared library. |
| 45 | The text portion of the object contains "overflow text" from |
| 46 | the shared library to be linked in with an object. */ |
| 47 | #define SLOMAGIC (MF_IS_SL | OMAGIC) |
| 48 | |
| 49 | /* Sqeezed demand paged. |
| 50 | NOTE: This interpretation of QMAGIC seems to be at variance |
| 51 | with that used on other architectures. */ |
| 52 | #define QMAGIC (MF_SQUEEZED | ZMAGIC) |
| 53 | |
| 54 | /* Program which uses sl. */ |
| 55 | #define SPZMAGIC (MF_USES_SL | ZMAGIC) |
| 56 | |
| 57 | /* Sqeezed ditto. */ |
| 58 | #define SPQMAGIC (MF_USES_SL | QMAGIC) |
| 59 | |
| 60 | /* Shared lib part of prog. */ |
| 61 | #define SLZMAGIC (MF_IS_SL | ZMAGIC) |
| 62 | |
| 63 | /* Sl which uses another. */ |
| 64 | #define SLPZMAGIC (MF_USES_SL | SLZMAGIC) |
| 65 | |
| 66 | #define N_SHARED_LIB(x) ((x).a_info & MF_USES_SL) |
| 67 | |
| 68 | /* Only a pure OMAGIC file has the minimal header. */ |
| 69 | #define N_TXTOFF(x) \ |
| 70 | ((x).a_info == OMAGIC \ |
| 71 | ? 32 \ |
| 72 | : (N_MAGIC(x) == ZMAGIC \ |
| 73 | ? TARGET_PAGE_SIZE \ |
| 74 | : 999)) |
| 75 | |
| 76 | #define N_TXTADDR(x) \ |
| 77 | (N_MAGIC(x) != ZMAGIC \ |
| 78 | ? (bfd_vma) 0 /* object file or NMAGIC */ \ |
| 79 | /* Programs with shared libs are loaded at the first page after all the \ |
| 80 | text segments of the shared library programs. Without looking this \ |
| 81 | up we can't know exactly what the address will be. A reasonable guess \ |
| 82 | is that a_entry will be in the first page of the executable. */ \ |
| 83 | : (N_SHARED_LIB(x) \ |
| 84 | ? ((x).a_entry & ~(bfd_vma) (TARGET_PAGE_SIZE - 1)) \ |
| 85 | : (bfd_vma) TEXT_START_ADDR)) |
| 86 | |
| 87 | #define N_SYMOFF(x) \ |
| 88 | (N_TXTOFF (x) + (x).a_text + (x).a_data + (x).a_trsize + (x).a_drsize) |
| 89 | |
| 90 | #define N_STROFF(x) (N_SYMOFF (x) + (x).a_syms) |
| 91 | |
| 92 | #define TEXT_START_ADDR 32768 |
| 93 | #define TARGET_PAGE_SIZE 32768 |
| 94 | #define SEGMENT_SIZE TARGET_PAGE_SIZE |
| 95 | #define DEFAULT_ARCH bfd_arch_arm |
| 96 | |
| 97 | /* Do not "beautify" the CONCAT* macro args. Traditional C will not |
| 98 | remove whitespace added here, and thus will fail to concatenate |
| 99 | the tokens. */ |
| 100 | #define MY(OP) CONCAT2 (arm_aout_riscix_,OP) |
| 101 | #define TARGETNAME "a.out-riscix" |
| 102 | #define N_BADMAG(x) ((((x).a_info & ~007200) != ZMAGIC) \ |
| 103 | && (((x).a_info & ~006000) != OMAGIC) \ |
| 104 | && ((x).a_info != NMAGIC)) |
| 105 | #define N_MAGIC(x) ((x).a_info & ~07200) |
| 106 | |
| 107 | #include "sysdep.h" |
| 108 | #include "bfd.h" |
| 109 | #include "libbfd.h" |
| 110 | |
| 111 | #define WRITE_HEADERS(abfd, execp) \ |
| 112 | { \ |
| 113 | bfd_size_type text_size; /* Dummy vars. */ \ |
| 114 | file_ptr text_end; \ |
| 115 | \ |
| 116 | if (adata (abfd).magic == undecided_magic) \ |
| 117 | NAME (aout, adjust_sizes_and_vmas) (abfd, & text_size, & text_end); \ |
| 118 | \ |
| 119 | execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE; \ |
| 120 | execp->a_entry = bfd_get_start_address (abfd); \ |
| 121 | \ |
| 122 | execp->a_trsize = ((obj_textsec (abfd)->reloc_count) * \ |
| 123 | obj_reloc_entry_size (abfd)); \ |
| 124 | execp->a_drsize = ((obj_datasec (abfd)->reloc_count) * \ |
| 125 | obj_reloc_entry_size (abfd)); \ |
| 126 | NAME (aout, swap_exec_header_out) (abfd, execp, & exec_bytes); \ |
| 127 | \ |
| 128 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 \ |
| 129 | || bfd_bwrite ((void *) & exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE, \ |
| 130 | abfd) != EXEC_BYTES_SIZE) \ |
| 131 | return FALSE; \ |
| 132 | /* Now write out reloc info, followed by syms and strings. */ \ |
| 133 | \ |
| 134 | if (bfd_get_outsymbols (abfd) != NULL \ |
| 135 | && bfd_get_symcount (abfd) != 0) \ |
| 136 | { \ |
| 137 | if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (* execp)), SEEK_SET) != 0)\ |
| 138 | return FALSE; \ |
| 139 | \ |
| 140 | if (! NAME (aout, write_syms) (abfd)) \ |
| 141 | return FALSE; \ |
| 142 | \ |
| 143 | if (bfd_seek (abfd, (file_ptr) (N_TRELOFF (* execp)), SEEK_SET) != 0)\ |
| 144 | return FALSE; \ |
| 145 | \ |
| 146 | if (! riscix_squirt_out_relocs (abfd, obj_textsec (abfd))) \ |
| 147 | return FALSE; \ |
| 148 | if (bfd_seek (abfd, (file_ptr) (N_DRELOFF (* execp)), SEEK_SET) != 0)\ |
| 149 | return FALSE; \ |
| 150 | \ |
| 151 | if (!NAME (aout, squirt_out_relocs) (abfd, obj_datasec (abfd))) \ |
| 152 | return FALSE; \ |
| 153 | } \ |
| 154 | } |
| 155 | |
| 156 | #include "libaout.h" |
| 157 | #include "aout/aout64.h" |
| 158 | |
| 159 | static bfd_reloc_status_type |
| 160 | riscix_fix_pcrel_26_done (bfd *abfd ATTRIBUTE_UNUSED, |
| 161 | arelent *reloc_entry ATTRIBUTE_UNUSED, |
| 162 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 163 | void * data ATTRIBUTE_UNUSED, |
| 164 | asection *input_section ATTRIBUTE_UNUSED, |
| 165 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 166 | char **error_message ATTRIBUTE_UNUSED) |
| 167 | { |
| 168 | /* This is dead simple at present. */ |
| 169 | return bfd_reloc_ok; |
| 170 | } |
| 171 | |
| 172 | static bfd_reloc_status_type riscix_fix_pcrel_26 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 173 | static const bfd_target *arm_aout_riscix_callback (bfd *); |
| 174 | |
| 175 | static reloc_howto_type riscix_std_reloc_howto[] = |
| 176 | { |
| 177 | /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ |
| 178 | HOWTO( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE), |
| 179 | HOWTO( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE), |
| 180 | HOWTO( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE), |
| 181 | HOWTO( 3, 2, 3, 26, TRUE, 0, complain_overflow_signed, riscix_fix_pcrel_26 , "ARM26", TRUE, 0x00ffffff,0x00ffffff, FALSE), |
| 182 | HOWTO( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, TRUE), |
| 183 | HOWTO( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, TRUE), |
| 184 | HOWTO( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, TRUE), |
| 185 | HOWTO( 7, 2, 3, 26, FALSE, 0, complain_overflow_signed, riscix_fix_pcrel_26_done, "ARM26D",TRUE,0x00ffffff,0x00ffffff, FALSE), |
| 186 | EMPTY_HOWTO (-1), |
| 187 | HOWTO( 9, 0, -1, 16, FALSE, 0, complain_overflow_bitfield,0,"NEG16", TRUE, 0x0000ffff,0x0000ffff, FALSE), |
| 188 | HOWTO( 10, 0, -2, 32, FALSE, 0, complain_overflow_bitfield,0,"NEG32", TRUE, 0xffffffff,0xffffffff, FALSE) |
| 189 | }; |
| 190 | |
| 191 | #define RISCIX_TABLE_SIZE \ |
| 192 | (sizeof (riscix_std_reloc_howto) / sizeof (reloc_howto_type)) |
| 193 | |
| 194 | static bfd_reloc_status_type |
| 195 | riscix_fix_pcrel_26 (bfd *abfd, |
| 196 | arelent *reloc_entry, |
| 197 | asymbol *symbol, |
| 198 | void * data, |
| 199 | asection *input_section, |
| 200 | bfd *output_bfd, |
| 201 | char **error_message ATTRIBUTE_UNUSED) |
| 202 | { |
| 203 | bfd_vma relocation; |
| 204 | bfd_size_type addr = reloc_entry->address; |
| 205 | long target = bfd_get_32 (abfd, (bfd_byte *) data + addr); |
| 206 | bfd_reloc_status_type flag = bfd_reloc_ok; |
| 207 | |
| 208 | /* If this is an undefined symbol, return error. */ |
| 209 | if (bfd_is_und_section (symbol->section) |
| 210 | && (symbol->flags & BSF_WEAK) == 0) |
| 211 | return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined; |
| 212 | |
| 213 | /* If the sections are different, and we are doing a partial relocation, |
| 214 | just ignore it for now. */ |
| 215 | if (symbol->section->name != input_section->name |
| 216 | && output_bfd != NULL) |
| 217 | return bfd_reloc_continue; |
| 218 | |
| 219 | relocation = (target & 0x00ffffff) << 2; |
| 220 | relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend. */ |
| 221 | relocation += symbol->value; |
| 222 | relocation += symbol->section->output_section->vma; |
| 223 | relocation += symbol->section->output_offset; |
| 224 | relocation += reloc_entry->addend; |
| 225 | relocation -= input_section->output_section->vma; |
| 226 | relocation -= input_section->output_offset; |
| 227 | relocation -= addr; |
| 228 | if (relocation & 3) |
| 229 | return bfd_reloc_overflow; |
| 230 | |
| 231 | /* Check for overflow. */ |
| 232 | if (relocation & 0x02000000) |
| 233 | { |
| 234 | if ((relocation & ~ (bfd_vma) 0x03ffffff) != ~ (bfd_vma) 0x03ffffff) |
| 235 | flag = bfd_reloc_overflow; |
| 236 | } |
| 237 | else if (relocation & ~ (bfd_vma) 0x03ffffff) |
| 238 | flag = bfd_reloc_overflow; |
| 239 | |
| 240 | target &= ~0x00ffffff; |
| 241 | target |= (relocation >> 2) & 0x00ffffff; |
| 242 | bfd_put_32 (abfd, (bfd_vma) target, (bfd_byte *) data + addr); |
| 243 | |
| 244 | /* Now the ARM magic... Change the reloc type so that it is marked as done. |
| 245 | Strictly this is only necessary if we are doing a partial relocation. */ |
| 246 | reloc_entry->howto = &riscix_std_reloc_howto[7]; |
| 247 | |
| 248 | return flag; |
| 249 | } |
| 250 | |
| 251 | static reloc_howto_type * |
| 252 | riscix_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code) |
| 253 | { |
| 254 | #define ASTD(i,j) case i: return &riscix_std_reloc_howto[j] |
| 255 | if (code == BFD_RELOC_CTOR) |
| 256 | switch (bfd_arch_bits_per_address (abfd)) |
| 257 | { |
| 258 | case 32: |
| 259 | code = BFD_RELOC_32; |
| 260 | break; |
| 261 | default: |
| 262 | return NULL; |
| 263 | } |
| 264 | |
| 265 | switch (code) |
| 266 | { |
| 267 | ASTD (BFD_RELOC_16, 1); |
| 268 | ASTD (BFD_RELOC_32, 2); |
| 269 | ASTD (BFD_RELOC_ARM_PCREL_BRANCH, 3); |
| 270 | ASTD (BFD_RELOC_8_PCREL, 4); |
| 271 | ASTD (BFD_RELOC_16_PCREL, 5); |
| 272 | ASTD (BFD_RELOC_32_PCREL, 6); |
| 273 | default: |
| 274 | return NULL; |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | static reloc_howto_type * |
| 279 | riscix_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 280 | const char *r_name) |
| 281 | { |
| 282 | unsigned int i; |
| 283 | |
| 284 | for (i = 0; |
| 285 | i < sizeof (riscix_std_reloc_howto) / sizeof (riscix_std_reloc_howto[0]); |
| 286 | i++) |
| 287 | if (riscix_std_reloc_howto[i].name != NULL |
| 288 | && strcasecmp (riscix_std_reloc_howto[i].name, r_name) == 0) |
| 289 | return &riscix_std_reloc_howto[i]; |
| 290 | |
| 291 | return NULL; |
| 292 | } |
| 293 | |
| 294 | #define MY_bfd_link_hash_table_create _bfd_generic_link_hash_table_create |
| 295 | #define MY_bfd_link_add_symbols _bfd_generic_link_add_symbols |
| 296 | #define MY_final_link_callback should_not_be_used |
| 297 | #define MY_bfd_final_link _bfd_generic_final_link |
| 298 | |
| 299 | #define MY_bfd_reloc_type_lookup riscix_reloc_type_lookup |
| 300 | #define MY_bfd_reloc_name_lookup riscix_reloc_name_lookup |
| 301 | #define MY_canonicalize_reloc arm_aout_riscix_canonicalize_reloc |
| 302 | #define MY_object_p arm_aout_riscix_object_p |
| 303 | |
| 304 | static void |
| 305 | riscix_swap_std_reloc_out (bfd *abfd, |
| 306 | arelent *g, |
| 307 | struct reloc_std_external *natptr) |
| 308 | { |
| 309 | int r_index; |
| 310 | asymbol *sym = *(g->sym_ptr_ptr); |
| 311 | int r_extern; |
| 312 | int r_length; |
| 313 | int r_pcrel; |
| 314 | int r_neg = 0; /* Negative relocs use the BASEREL bit. */ |
| 315 | asection *output_section = sym->section->output_section; |
| 316 | |
| 317 | PUT_WORD(abfd, g->address, natptr->r_address); |
| 318 | |
| 319 | r_length = g->howto->size ; /* Size as a power of two. */ |
| 320 | if (r_length < 0) |
| 321 | { |
| 322 | r_length = -r_length; |
| 323 | r_neg = 1; |
| 324 | } |
| 325 | |
| 326 | r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ |
| 327 | |
| 328 | /* For RISC iX, in pc-relative relocs the r_pcrel bit means that the |
| 329 | relocation has been done already (Only for the 26-bit one I think)? */ |
| 330 | if (r_length == 3) |
| 331 | r_pcrel = r_pcrel ? 0 : 1; |
| 332 | |
| 333 | /* Name was clobbered by aout_write_syms to be symbol index. */ |
| 334 | |
| 335 | /* If this relocation is relative to a symbol then set the |
| 336 | r_index to the symbols index, and the r_extern bit. |
| 337 | |
| 338 | Absolute symbols can come in in two ways, either as an offset |
| 339 | from the abs section, or as a symbol which has an abs value. |
| 340 | check for that here. */ |
| 341 | |
| 342 | if (bfd_is_com_section (output_section) |
| 343 | || bfd_is_abs_section (output_section) |
| 344 | || bfd_is_und_section (output_section)) |
| 345 | { |
| 346 | if (bfd_abs_section_ptr->symbol == sym) |
| 347 | { |
| 348 | /* Whoops, looked like an abs symbol, but is really an offset |
| 349 | from the abs section. */ |
| 350 | r_index = 0; |
| 351 | r_extern = 0; |
| 352 | } |
| 353 | else |
| 354 | { |
| 355 | /* Fill in symbol. */ |
| 356 | r_extern = 1; |
| 357 | r_index = (*g->sym_ptr_ptr)->udata.i; |
| 358 | } |
| 359 | } |
| 360 | else |
| 361 | { |
| 362 | /* Just an ordinary section. */ |
| 363 | r_extern = 0; |
| 364 | r_index = output_section->target_index; |
| 365 | } |
| 366 | |
| 367 | /* Now the fun stuff. */ |
| 368 | if (bfd_header_big_endian (abfd)) |
| 369 | { |
| 370 | natptr->r_index[0] = r_index >> 16; |
| 371 | natptr->r_index[1] = r_index >> 8; |
| 372 | natptr->r_index[2] = r_index; |
| 373 | natptr->r_type[0] = |
| 374 | ( (r_extern ? RELOC_STD_BITS_EXTERN_BIG: 0) |
| 375 | | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG: 0) |
| 376 | | (r_neg ? RELOC_STD_BITS_BASEREL_BIG: 0) |
| 377 | | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); |
| 378 | } |
| 379 | else |
| 380 | { |
| 381 | natptr->r_index[2] = r_index >> 16; |
| 382 | natptr->r_index[1] = r_index >> 8; |
| 383 | natptr->r_index[0] = r_index; |
| 384 | natptr->r_type[0] = |
| 385 | ( (r_extern ? RELOC_STD_BITS_EXTERN_LITTLE: 0) |
| 386 | | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE: 0) |
| 387 | | (r_neg ? RELOC_STD_BITS_BASEREL_LITTLE: 0) |
| 388 | | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | static bfd_boolean |
| 393 | riscix_squirt_out_relocs (bfd *abfd, asection *section) |
| 394 | { |
| 395 | arelent **generic; |
| 396 | unsigned char *native, *natptr; |
| 397 | size_t each_size; |
| 398 | unsigned int count = section->reloc_count; |
| 399 | bfd_size_type natsize; |
| 400 | |
| 401 | if (count == 0) |
| 402 | return TRUE; |
| 403 | |
| 404 | each_size = obj_reloc_entry_size (abfd); |
| 405 | natsize = each_size; |
| 406 | natsize *= count; |
| 407 | native = bfd_zalloc (abfd, natsize); |
| 408 | if (!native) |
| 409 | return FALSE; |
| 410 | |
| 411 | generic = section->orelocation; |
| 412 | |
| 413 | for (natptr = native; |
| 414 | count != 0; |
| 415 | --count, natptr += each_size, ++generic) |
| 416 | riscix_swap_std_reloc_out (abfd, *generic, |
| 417 | (struct reloc_std_external *) natptr); |
| 418 | |
| 419 | if (bfd_bwrite ((void *) native, natsize, abfd) != natsize) |
| 420 | { |
| 421 | bfd_release (abfd, native); |
| 422 | return FALSE; |
| 423 | } |
| 424 | |
| 425 | bfd_release (abfd, native); |
| 426 | return TRUE; |
| 427 | } |
| 428 | |
| 429 | /* This is just like the standard aoutx.h version but we need to do our |
| 430 | own mapping of external reloc type values to howto entries. */ |
| 431 | |
| 432 | static long |
| 433 | MY (canonicalize_reloc) (bfd *abfd, |
| 434 | sec_ptr section, |
| 435 | arelent **relptr, |
| 436 | asymbol **symbols) |
| 437 | { |
| 438 | arelent *tblptr = section->relocation; |
| 439 | unsigned int count, c; |
| 440 | extern reloc_howto_type NAME (aout, std_howto_table)[]; |
| 441 | |
| 442 | /* If we have already read in the relocation table, return the values. */ |
| 443 | if (section->flags & SEC_CONSTRUCTOR) |
| 444 | { |
| 445 | arelent_chain *chain = section->constructor_chain; |
| 446 | |
| 447 | for (count = 0; count < section->reloc_count; count++) |
| 448 | { |
| 449 | *relptr++ = &chain->relent; |
| 450 | chain = chain->next; |
| 451 | } |
| 452 | *relptr = 0; |
| 453 | return section->reloc_count; |
| 454 | } |
| 455 | |
| 456 | if (tblptr && section->reloc_count) |
| 457 | { |
| 458 | for (count = 0; count++ < section->reloc_count;) |
| 459 | *relptr++ = tblptr++; |
| 460 | *relptr = 0; |
| 461 | return section->reloc_count; |
| 462 | } |
| 463 | |
| 464 | if (!NAME (aout, slurp_reloc_table) (abfd, section, symbols)) |
| 465 | return -1; |
| 466 | tblptr = section->relocation; |
| 467 | |
| 468 | /* Fix up howto entries. */ |
| 469 | for (count = 0; count++ < section->reloc_count;) |
| 470 | { |
| 471 | c = tblptr->howto - NAME(aout,std_howto_table); |
| 472 | BFD_ASSERT (c < RISCIX_TABLE_SIZE); |
| 473 | tblptr->howto = &riscix_std_reloc_howto[c]; |
| 474 | |
| 475 | *relptr++ = tblptr++; |
| 476 | } |
| 477 | *relptr = 0; |
| 478 | return section->reloc_count; |
| 479 | } |
| 480 | |
| 481 | /* This is the same as NAME(aout,some_aout_object_p), but has different |
| 482 | expansions of the macro definitions. */ |
| 483 | |
| 484 | static const bfd_target * |
| 485 | riscix_some_aout_object_p (bfd *abfd, |
| 486 | struct internal_exec *execp, |
| 487 | const bfd_target *(*callback_to_real_object_p) (bfd *)) |
| 488 | { |
| 489 | struct aout_data_struct *rawptr, *oldrawptr; |
| 490 | const bfd_target *result; |
| 491 | bfd_size_type amt = sizeof (struct aout_data_struct); |
| 492 | |
| 493 | rawptr = bfd_zalloc (abfd, amt); |
| 494 | |
| 495 | if (rawptr == NULL) |
| 496 | return NULL; |
| 497 | |
| 498 | oldrawptr = abfd->tdata.aout_data; |
| 499 | abfd->tdata.aout_data = rawptr; |
| 500 | |
| 501 | /* Copy the contents of the old tdata struct. |
| 502 | In particular, we want the subformat, since for hpux it was set in |
| 503 | hp300hpux.c:swap_exec_header_in and will be used in |
| 504 | hp300hpux.c:callback. */ |
| 505 | if (oldrawptr != NULL) |
| 506 | *abfd->tdata.aout_data = *oldrawptr; |
| 507 | |
| 508 | abfd->tdata.aout_data->a.hdr = &rawptr->e; |
| 509 | /* Copy in the internal_exec struct. */ |
| 510 | *(abfd->tdata.aout_data->a.hdr) = *execp; |
| 511 | execp = abfd->tdata.aout_data->a.hdr; |
| 512 | |
| 513 | /* Set the file flags. */ |
| 514 | abfd->flags = BFD_NO_FLAGS; |
| 515 | if (execp->a_drsize || execp->a_trsize) |
| 516 | abfd->flags |= HAS_RELOC; |
| 517 | /* Setting of EXEC_P has been deferred to the bottom of this function. */ |
| 518 | if (execp->a_syms) |
| 519 | abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; |
| 520 | if (N_DYNAMIC(*execp)) |
| 521 | abfd->flags |= DYNAMIC; |
| 522 | |
| 523 | /* Squeezed files aren't supported (yet)! */ |
| 524 | if ((execp->a_info & MF_SQUEEZED) != 0) |
| 525 | { |
| 526 | bfd_set_error (bfd_error_wrong_format); |
| 527 | return NULL; |
| 528 | } |
| 529 | else if ((execp->a_info & MF_IS_SL) != 0) |
| 530 | { |
| 531 | /* Nor are shared libraries. */ |
| 532 | bfd_set_error (bfd_error_wrong_format); |
| 533 | return NULL; |
| 534 | } |
| 535 | else if (N_MAGIC (*execp) == ZMAGIC) |
| 536 | { |
| 537 | abfd->flags |= D_PAGED | WP_TEXT; |
| 538 | adata (abfd).magic = z_magic; |
| 539 | } |
| 540 | else if (N_MAGIC (*execp) == NMAGIC) |
| 541 | { |
| 542 | abfd->flags |= WP_TEXT; |
| 543 | adata (abfd).magic = n_magic; |
| 544 | } |
| 545 | else if (N_MAGIC (*execp) == OMAGIC) |
| 546 | adata (abfd).magic = o_magic; |
| 547 | else |
| 548 | /* Should have been checked with N_BADMAG before this routine |
| 549 | was called. */ |
| 550 | abort (); |
| 551 | |
| 552 | bfd_get_start_address (abfd) = execp->a_entry; |
| 553 | |
| 554 | obj_aout_symbols (abfd) = NULL; |
| 555 | bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); |
| 556 | |
| 557 | /* The default relocation entry size is that of traditional V7 Unix. */ |
| 558 | obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; |
| 559 | |
| 560 | /* The default symbol entry size is that of traditional Unix. */ |
| 561 | obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; |
| 562 | |
| 563 | obj_aout_external_syms (abfd) = NULL; |
| 564 | obj_aout_external_strings (abfd) = NULL; |
| 565 | obj_aout_sym_hashes (abfd) = NULL; |
| 566 | |
| 567 | if (! NAME (aout, make_sections) (abfd)) |
| 568 | return NULL; |
| 569 | |
| 570 | obj_datasec (abfd)->size = execp->a_data; |
| 571 | obj_bsssec (abfd)->size = execp->a_bss; |
| 572 | |
| 573 | obj_textsec (abfd)->flags = |
| 574 | (execp->a_trsize != 0 |
| 575 | ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) |
| 576 | : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); |
| 577 | obj_datasec (abfd)->flags = |
| 578 | (execp->a_drsize != 0 |
| 579 | ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) |
| 580 | : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); |
| 581 | obj_bsssec (abfd)->flags = SEC_ALLOC; |
| 582 | |
| 583 | result = (*callback_to_real_object_p) (abfd); |
| 584 | |
| 585 | #if defined(MACH) || defined(STAT_FOR_EXEC) |
| 586 | /* The original heuristic doesn't work in some important cases. The |
| 587 | a.out file has no information about the text start address. For |
| 588 | files (like kernels) linked to non-standard addresses (ld -Ttext |
| 589 | nnn) the entry point may not be between the default text start |
| 590 | (obj_textsec(abfd)->vma) and (obj_textsec(abfd)->vma) + text size |
| 591 | This is not just a mach issue. Many kernels are loaded at non |
| 592 | standard addresses. */ |
| 593 | { |
| 594 | struct stat stat_buf; |
| 595 | |
| 596 | if (abfd->iostream != NULL |
| 597 | && (abfd->flags & BFD_IN_MEMORY) == 0 |
| 598 | && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0) |
| 599 | && ((stat_buf.st_mode & 0111) != 0)) |
| 600 | abfd->flags |= EXEC_P; |
| 601 | } |
| 602 | #else /* ! MACH */ |
| 603 | /* Now that the segment addresses have been worked out, take a better |
| 604 | guess at whether the file is executable. If the entry point |
| 605 | is within the text segment, assume it is. (This makes files |
| 606 | executable even if their entry point address is 0, as long as |
| 607 | their text starts at zero.) |
| 608 | |
| 609 | At some point we should probably break down and stat the file and |
| 610 | declare it executable if (one of) its 'x' bits are on... */ |
| 611 | if ((execp->a_entry >= obj_textsec(abfd)->vma) && |
| 612 | (execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->size)) |
| 613 | abfd->flags |= EXEC_P; |
| 614 | #endif /* MACH */ |
| 615 | if (result == NULL) |
| 616 | { |
| 617 | free (rawptr); |
| 618 | abfd->tdata.aout_data = oldrawptr; |
| 619 | } |
| 620 | return result; |
| 621 | } |
| 622 | |
| 623 | static const bfd_target * |
| 624 | MY (object_p) (bfd *abfd) |
| 625 | { |
| 626 | struct external_exec exec_bytes; /* Raw exec header from file. */ |
| 627 | struct internal_exec exec; /* Cleaned-up exec header. */ |
| 628 | const bfd_target *target; |
| 629 | |
| 630 | if (bfd_bread ((void *) &exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE, abfd) |
| 631 | != EXEC_BYTES_SIZE) |
| 632 | { |
| 633 | if (bfd_get_error () != bfd_error_system_call) |
| 634 | bfd_set_error (bfd_error_wrong_format); |
| 635 | return NULL; |
| 636 | } |
| 637 | |
| 638 | exec.a_info = H_GET_32 (abfd, exec_bytes.e_info); |
| 639 | |
| 640 | if (N_BADMAG (exec)) |
| 641 | return NULL; |
| 642 | |
| 643 | #ifdef MACHTYPE_OK |
| 644 | if (!(MACHTYPE_OK (N_MACHTYPE (exec)))) |
| 645 | return NULL; |
| 646 | #endif |
| 647 | |
| 648 | NAME (aout, swap_exec_header_in) (abfd, & exec_bytes, & exec); |
| 649 | |
| 650 | target = riscix_some_aout_object_p (abfd, & exec, MY (callback)); |
| 651 | |
| 652 | return target; |
| 653 | } |
| 654 | |
| 655 | #include "aout-target.h" |