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 :-)
7 Written by Klaus K"ampf (kkaempf@progis.de)
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
);