1 /* evax-egsd.c -- BFD back-end for ALPHA EVAX (openVMS/Alpha) files.
2 Copyright 1996, 1997 Free Software Foundation Inc.
4 go and read the openVMS linker manual (esp. appendix B)
5 if you don't know what's going on here :-)
8 of proGIS Softwareentwicklung, Aachen, Germany
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
35 /*-----------------------------------------------------------------------------*/
37 /* sections every evax object file has */
39 #define EVAX_ABS_NAME "$ABS$"
40 #define EVAX_CODE_NAME "$CODE$"
41 #define EVAX_LINK_NAME "$LINK$"
42 #define EVAX_DATA_NAME "$DATA$"
43 #define EVAX_BSS_NAME "$BSS$"
44 #define EVAX_READONLY_NAME "$READONLY$"
45 #define EVAX_LITERAL_NAME "$LITERAL$"
46 #define EVAX_COMMON_NAME "$COMMON$"
47 #define EVAX_LOCAL_NAME "$LOCAL$"
49 struct sec_flags_struct {
50 char *name; /* name of section */
52 flagword flags_always; /* flags we set always */
54 flagword flags_hassize; /* flags we set if the section has a size > 0 */
57 /* just a dummy flag array since i don't understand it yet */
59 static struct sec_flags_struct evax_section_flags[] = {
64 (SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
66 (EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_EXE),
68 (EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_EXE),
69 (SEC_IN_MEMORY|SEC_CODE|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
71 (EGPS_S_V_REL|EGPS_S_V_RD),
72 (SEC_DATA|SEC_READONLY),
73 (EGPS_S_V_REL|EGPS_S_V_RD),
74 (SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
76 (EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
78 (EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
79 (SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
81 (EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT|EGPS_S_V_NOMOD),
83 (EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT|EGPS_S_V_NOMOD),
84 (SEC_IN_MEMORY|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
86 (EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD),
87 (SEC_DATA|SEC_READONLY),
88 (EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD),
89 (SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
91 (EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD),
92 (SEC_DATA|SEC_READONLY),
93 (EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD),
94 (SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
96 (EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
98 (EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
99 (SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) }
102 /* Retrieve bfd section flags by name and size */
105 evax_secflag_by_name(name, size)
111 while (evax_section_flags[i].name != NULL)
113 if (strcmp (name, evax_section_flags[i].name) == 0)
116 return evax_section_flags[i].flags_hassize;
118 return evax_section_flags[i].flags_always;
123 return evax_section_flags[i].flags_hassize;
124 return evax_section_flags[i].flags_always;
128 /* Retrieve evax section flags by name and size */
131 evax_esecflag_by_name(name, size)
137 while (evax_section_flags[i].name != NULL)
139 if (strcmp (name, evax_section_flags[i].name) == 0)
142 return evax_section_flags[i].eflags_hassize;
144 return evax_section_flags[i].eflags_always;
149 return evax_section_flags[i].eflags_hassize;
150 return evax_section_flags[i].eflags_always;
153 /*-----------------------------------------------------------------------------*/
157 struct flagdescstruct { char *name; flagword value; };
159 /* Convert flag to printable string */
162 flag2str(flagdesc, flags)
163 struct flagdescstruct *flagdesc;
171 while (flagdesc->name != NULL)
173 if ((flags & flagdesc->value) != 0)
179 strcat (res, flagdesc->name);
187 /*-----------------------------------------------------------------------------*/
190 /* Process EGSD record
191 return 0 on success, -1 on error */
194 _bfd_evax_slurp_egsd (abfd)
198 static struct flagdescstruct gpsflagdesc[] =
215 static struct flagdescstruct gsyflagdesc[] =
228 int gsd_type, gsd_size;
230 unsigned char *evax_rec;
231 flagword new_flags, old_flags;
234 evax_symbol_entry *entry;
235 unsigned long base_addr;
236 unsigned long align_addr;
239 evax_debug (2, "EGSD\n");
242 PRIV(evax_rec) += 8; /* skip type, size, l_temp */
245 /* calculate base address for each section */
250 while (PRIV(rec_size) > 0)
252 evax_rec = PRIV(evax_rec);
253 _bfd_evax_get_header_values (abfd, evax_rec, &gsd_type, &gsd_size);
258 /* program section definition */
260 name = _bfd_evax_save_counted_string ((char *)evax_rec+12);
261 section = bfd_make_section (abfd, name);
264 old_flags = bfd_getl16 (evax_rec + 6);
265 section->_raw_size = bfd_getl32 (evax_rec + 8); /* allocation */
266 new_flags = evax_secflag_by_name (name, (int) section->_raw_size);
267 if (old_flags & EGPS_S_V_REL)
268 new_flags |= SEC_RELOC;
269 if (!bfd_set_section_flags (abfd, section, new_flags))
271 section->alignment_power = evax_rec[4];
272 align_addr = (1 << section->alignment_power);
273 if ((base_addr % align_addr) != 0)
274 base_addr += (align_addr - (base_addr % align_addr));
275 section->vma = (bfd_vma)base_addr;
276 base_addr += section->_raw_size;
277 section->contents = ((unsigned char *)
278 bfd_malloc (section->_raw_size));
279 if (section->contents == NULL)
281 memset (section->contents, 0, (size_t) section->_raw_size);
282 section->_cooked_size = section->_raw_size;
284 evax_debug(3, "egsd psc %d (%s, flags %04x=%s) ",
285 section->index, name, old_flags, flag2str(gpsflagdesc, old_flags));
286 evax_debug(3, "%d bytes at 0x%08lx (mem %p)\n",
287 section->_raw_size, section->vma, section->contents);
294 /* symbol specification (definition or reference) */
296 symbol = _bfd_evax_make_empty_symbol (abfd);
300 old_flags = bfd_getl16 (evax_rec + 6);
301 new_flags = BSF_NO_FLAGS;
303 if (old_flags & EGSY_S_V_WEAK)
304 new_flags |= BSF_WEAK;
306 if (evax_rec[6] & EGSY_S_V_DEF) /* symbol definition */
309 _bfd_evax_save_counted_string ((char *)evax_rec+32);
310 if (old_flags & EGSY_S_V_NORM)
312 new_flags |= BSF_FUNCTION;
314 symbol->value = bfd_getl64 (evax_rec+8);
315 symbol->section = (asection *)((unsigned long) bfd_getl32 (evax_rec+28));
317 evax_debug(3, "egsd sym def #%d (%s, %d, %04x=%s)\n", abfd->symcount,
318 symbol->name, (int)symbol->section, old_flags, flag2str(gsyflagdesc, old_flags));
321 else /* symbol reference */
324 _bfd_evax_save_counted_string ((char *)evax_rec+8);
326 evax_debug(3, "egsd sym ref #%d (%s, %04x=%s)\n", abfd->symcount,
327 symbol->name, old_flags, flag2str(gsyflagdesc, old_flags));
329 symbol->section = bfd_make_section (abfd, BFD_UND_SECTION_NAME);
332 symbol->flags = new_flags;
334 /* save symbol in evax_symbol_table */
336 entry = (evax_symbol_entry *) bfd_hash_lookup (PRIV(evax_symbol_table), symbol->name, true, false);
337 if (entry == (evax_symbol_entry *)NULL)
339 bfd_set_error (bfd_error_no_memory);
342 if (entry->symbol != (asymbol *)NULL)
343 { /* FIXME ?, DEC C generates this */
345 evax_debug(3, "EGSD_S_C_SYM: duplicate \"%s\"\n", symbol->name);
350 entry->symbol = symbol;
351 PRIV(egsd_sym_count)++;
361 (*_bfd_error_handler) ("unknown egsd subtype %d", gsd_type);
362 bfd_set_error (bfd_error_bad_value);
367 PRIV(rec_size) -= gsd_size;
368 PRIV(evax_rec) += gsd_size;
370 } /* while (recsize > 0) */
372 if (abfd->symcount > 0)
373 abfd->flags |= HAS_SYMS;
378 /*-----------------------------------------------------------------------------*/
379 /* output routines */
381 /* Write section and symbol directory of bfd abfd */
384 _bfd_evax_write_egsd (abfd)
393 flagword new_flags, old_flags;
398 evax_debug (2, "evax_write_egsd(%p)\n", abfd);
401 /* output sections */
403 section = abfd->sections;
405 evax_debug (3, "%d sections found\n", abfd->section_count);
408 /* egsd is quadword aligned */
410 _bfd_evax_output_alignment (abfd, 8);
412 _bfd_evax_output_begin (abfd, EOBJ_S_C_EGSD, -1);
413 _bfd_evax_output_long (abfd, 0);
414 _bfd_evax_output_push (abfd); /* prepare output for subrecords */
419 evax_debug (3, "Section #%d %s, %d bytes\n", section->index, section->name, (int)section->_raw_size);
422 /* 13 bytes egsd, max 31 chars name -> should be 44 bytes */
423 if (_bfd_evax_output_check (abfd, 64) < 0)
425 _bfd_evax_output_pop (abfd);
426 _bfd_evax_output_end (abfd);
427 _bfd_evax_output_begin (abfd, EOBJ_S_C_EGSD, -1);
428 _bfd_evax_output_long (abfd, 0);
429 _bfd_evax_output_push (abfd); /* prepare output for subrecords */
432 /* Create dummy sections to keep consecutive indices */
434 while (section->index - last_index > 1)
437 evax_debug (3, "index %d, last %d\n", section->index, last_index);
439 _bfd_evax_output_begin (abfd, EGSD_S_C_PSC, -1);
440 _bfd_evax_output_short (abfd, 0);
441 _bfd_evax_output_short (abfd, 0);
442 _bfd_evax_output_long (abfd, 0);
443 sprintf (dummy_name, ".DUMMY%02d", last_index);
444 _bfd_evax_output_counted (abfd, dummy_name);
445 _bfd_evax_output_flush (abfd);
449 /* Don't know if this is neccesary for the linker but for now it keeps
450 evax_slurp_egsd happy */
452 sname = (char *)section->name;
456 if ((*sname == 't') && (strcmp (sname, "text") == 0))
457 sname = EVAX_CODE_NAME;
458 else if ((*sname == 'd') && (strcmp (sname, "data") == 0))
459 sname = EVAX_DATA_NAME;
460 else if ((*sname == 'b') && (strcmp (sname, "bss") == 0))
461 sname = EVAX_BSS_NAME;
462 else if ((*sname == 'l') && (strcmp (sname, "link") == 0))
463 sname = EVAX_LINK_NAME;
464 else if ((*sname == 'r') && (strcmp (sname, "rdata") == 0))
465 sname = EVAX_READONLY_NAME;
466 else if ((*sname == 'l') && (strcmp (sname, "literal") == 0))
467 sname = EVAX_LITERAL_NAME;
468 else if ((*sname == 'c') && (strcmp (sname, "comm") == 0))
469 sname = EVAX_COMMON_NAME;
470 else if ((*sname == 'l') && (strcmp (sname, "lcomm") == 0))
471 sname = EVAX_LOCAL_NAME;
474 _bfd_evax_output_begin (abfd, EGSD_S_C_PSC, -1);
475 _bfd_evax_output_short (abfd, section->alignment_power & 0xff);
476 _bfd_evax_output_short (abfd,
477 evax_esecflag_by_name (sname,
478 section->_raw_size));
479 _bfd_evax_output_long (abfd, section->_raw_size);
480 _bfd_evax_output_counted (abfd, sname);
481 _bfd_evax_output_flush (abfd);
483 last_index = section->index;
484 section = section->next;
490 evax_debug (3, "%d symbols found\n", abfd->symcount);
493 bfd_set_start_address (abfd, (bfd_vma)-1);
495 for (symnum = 0; symnum < abfd->symcount; symnum++)
498 symbol = abfd->outsymbols[symnum];
499 if (*(symbol->name) == '_')
501 if (strcmp (symbol->name, "__main") == 0)
502 bfd_set_start_address (abfd, (bfd_vma)symbol->value);
504 old_flags = symbol->flags;
506 if ((*(symbol->section->name+1) == 'c')
507 && (strcmp (symbol->section->name+1, "comm") == 0)
508 && (strcmp (symbol->name, ".comm") != 0))
509 old_flags |= BSF_GLOBAL;
511 if (old_flags & BSF_FILE)
514 if (((old_flags & BSF_GLOBAL) == 0) /* not xdef */
515 && (!bfd_is_und_section (symbol->section))) /* and not xref */
516 continue; /* dont output */
518 /* 13 bytes egsd, max 64 chars name -> should be 77 bytes */
520 if (_bfd_evax_output_check (abfd, 80) < 0)
522 _bfd_evax_output_pop (abfd);
523 _bfd_evax_output_end (abfd);
524 _bfd_evax_output_begin (abfd, EOBJ_S_C_EGSD, -1);
525 _bfd_evax_output_long (abfd, 0);
526 _bfd_evax_output_push (abfd); /* prepare output for subrecords */
529 _bfd_evax_output_begin (abfd, EGSD_S_C_SYM, -1);
531 _bfd_evax_output_short (abfd, 0); /* data type, alignment */
534 if (old_flags & BSF_WEAK)
535 new_flags |= EGSY_S_V_WEAK;
536 if (old_flags & BSF_FUNCTION)
538 new_flags |= EGSY_S_V_NORM;
539 new_flags |= EGSY_S_V_REL;
541 if (old_flags & BSF_GLOBAL)
543 new_flags |= EGSY_S_V_DEF;
544 if (!bfd_is_abs_section (symbol->section))
545 new_flags |= EGSY_S_V_REL;
547 _bfd_evax_output_short (abfd, new_flags);
549 if (old_flags & BSF_GLOBAL) /* symbol definition */
551 if (old_flags & BSF_FUNCTION)
553 _bfd_evax_output_quad (abfd, symbol->value);
554 _bfd_evax_output_quad (abfd,
555 ((asymbol *)(symbol->udata.p))->value);
556 _bfd_evax_output_long (abfd,
557 (((asymbol *)(symbol->udata.p))
559 _bfd_evax_output_long (abfd, symbol->section->index);
563 _bfd_evax_output_quad (abfd, symbol->value); /* L_VALUE */
564 _bfd_evax_output_quad (abfd, 0); /* L_CODE_ADDRESS */
565 _bfd_evax_output_long (abfd, 0); /* L_CA_PSINDX */
566 _bfd_evax_output_long (abfd, symbol->section->index);/* L_PSINDX, FIXME */
569 _bfd_evax_output_counted (abfd, _bfd_evax_length_hash_symbol (abfd, symbol->name));
571 _bfd_evax_output_flush (abfd);
575 _bfd_evax_output_alignment (abfd, 8);
576 _bfd_evax_output_pop (abfd);
577 _bfd_evax_output_end (abfd);