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_READONLYADDR_NAME "$READONLY_ADDR$"
45 #define EVAX_READONLY_NAME "$READONLY$"
46 #define EVAX_LITERAL_NAME "$LITERAL$"
47 #define EVAX_COMMON_NAME "$COMMON$"
48 #define EVAX_LOCAL_NAME "$LOCAL$"
50 struct sec_flags_struct
{
51 char *name
; /* name of section */
53 flagword flags_always
; /* flags we set always */
55 flagword flags_hassize
; /* flags we set if the section has a size > 0 */
58 /* These flags are deccrtl/vaxcrtl (openVMS 6.2) compatible */
60 static struct sec_flags_struct evax_section_flags
[] = {
65 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_LOAD
) },
67 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_SHR
|EGPS_S_V_EXE
),
69 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_SHR
|EGPS_S_V_EXE
),
70 (SEC_IN_MEMORY
|SEC_CODE
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_LOAD
) },
72 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_SHR
|EGPS_S_V_RD
|EGPS_S_V_NOMOD
),
73 (SEC_DATA
|SEC_READONLY
),
74 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_SHR
|EGPS_S_V_RD
),
75 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_READONLY
|SEC_LOAD
) },
77 (EGPS_S_V_REL
|EGPS_S_V_RD
),
78 (SEC_DATA
|SEC_READONLY
),
79 (EGPS_S_V_REL
|EGPS_S_V_RD
),
80 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_READONLY
|SEC_LOAD
) },
82 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
|EGPS_S_V_NOMOD
),
84 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
),
85 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_LOAD
) },
87 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
|EGPS_S_V_NOMOD
),
89 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
|EGPS_S_V_NOMOD
),
90 (SEC_IN_MEMORY
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_LOAD
) },
91 { EVAX_READONLYADDR_NAME
,
92 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_RD
),
93 (SEC_DATA
|SEC_READONLY
),
94 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_RD
),
95 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_READONLY
|SEC_LOAD
) },
97 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_SHR
|EGPS_S_V_RD
|EGPS_S_V_NOMOD
),
98 (SEC_DATA
|SEC_READONLY
),
99 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_SHR
|EGPS_S_V_RD
),
100 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_READONLY
|SEC_LOAD
) },
102 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
),
104 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
),
105 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_LOAD
) },
107 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
),
109 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
),
110 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_LOAD
) }
113 /* Retrieve bfd section flags by name and size */
116 evax_secflag_by_name(name
, size
)
122 while (evax_section_flags
[i
].name
!= NULL
)
124 if (strcmp (name
, evax_section_flags
[i
].name
) == 0)
127 return evax_section_flags
[i
].flags_hassize
;
129 return evax_section_flags
[i
].flags_always
;
134 return evax_section_flags
[i
].flags_hassize
;
135 return evax_section_flags
[i
].flags_always
;
139 /* Retrieve evax section flags by name and size */
142 evax_esecflag_by_name(name
, size
)
148 while (evax_section_flags
[i
].name
!= NULL
)
150 if (strcmp (name
, evax_section_flags
[i
].name
) == 0)
153 return evax_section_flags
[i
].eflags_hassize
;
155 return evax_section_flags
[i
].eflags_always
;
160 return evax_section_flags
[i
].eflags_hassize
;
161 return evax_section_flags
[i
].eflags_always
;
164 /*-----------------------------------------------------------------------------*/
168 struct flagdescstruct
{ char *name
; flagword value
; };
170 /* Convert flag to printable string */
173 flag2str(flagdesc
, flags
)
174 struct flagdescstruct
*flagdesc
;
182 while (flagdesc
->name
!= NULL
)
184 if ((flags
& flagdesc
->value
) != 0)
190 strcat (res
, flagdesc
->name
);
198 /*-----------------------------------------------------------------------------*/
201 /* Process EGSD record
202 return 0 on success, -1 on error */
205 _bfd_evax_slurp_egsd (abfd
)
209 static struct flagdescstruct gpsflagdesc
[] =
226 static struct flagdescstruct gsyflagdesc
[] =
239 int gsd_type
, gsd_size
;
241 unsigned char *evax_rec
;
242 flagword new_flags
, old_flags
;
245 evax_symbol_entry
*entry
;
246 unsigned long base_addr
;
247 unsigned long align_addr
;
250 evax_debug (2, "EGSD\n");
253 PRIV(evax_rec
) += 8; /* skip type, size, l_temp */
256 /* calculate base address for each section */
261 while (PRIV(rec_size
) > 0)
263 evax_rec
= PRIV(evax_rec
);
264 _bfd_evax_get_header_values (abfd
, evax_rec
, &gsd_type
, &gsd_size
);
269 /* program section definition */
271 name
= _bfd_evax_save_counted_string ((char *)evax_rec
+12);
272 section
= bfd_make_section (abfd
, name
);
275 old_flags
= bfd_getl16 (evax_rec
+ 6);
276 section
->_raw_size
= bfd_getl32 (evax_rec
+ 8); /* allocation */
277 new_flags
= evax_secflag_by_name (name
, (int) section
->_raw_size
);
278 if (old_flags
& EGPS_S_V_REL
)
279 new_flags
|= SEC_RELOC
;
280 if (!bfd_set_section_flags (abfd
, section
, new_flags
))
282 section
->alignment_power
= evax_rec
[4];
283 align_addr
= (1 << section
->alignment_power
);
284 if ((base_addr
% align_addr
) != 0)
285 base_addr
+= (align_addr
- (base_addr
% align_addr
));
286 section
->vma
= (bfd_vma
)base_addr
;
287 base_addr
+= section
->_raw_size
;
288 section
->contents
= ((unsigned char *)
289 bfd_malloc (section
->_raw_size
));
290 if (section
->contents
== NULL
)
292 memset (section
->contents
, 0, (size_t) section
->_raw_size
);
293 section
->_cooked_size
= section
->_raw_size
;
295 evax_debug(3, "egsd psc %d (%s, flags %04x=%s) ",
296 section
->index
, name
, old_flags
, flag2str(gpsflagdesc
, old_flags
));
297 evax_debug(3, "%d bytes at 0x%08lx (mem %p)\n",
298 section
->_raw_size
, section
->vma
, section
->contents
);
305 /* symbol specification (definition or reference) */
307 symbol
= _bfd_evax_make_empty_symbol (abfd
);
311 old_flags
= bfd_getl16 (evax_rec
+ 6);
312 new_flags
= BSF_NO_FLAGS
;
314 if (old_flags
& EGSY_S_V_WEAK
)
315 new_flags
|= BSF_WEAK
;
317 if (evax_rec
[6] & EGSY_S_V_DEF
) /* symbol definition */
320 _bfd_evax_save_counted_string ((char *)evax_rec
+32);
321 if (old_flags
& EGSY_S_V_NORM
)
323 new_flags
|= BSF_FUNCTION
;
325 symbol
->value
= bfd_getl64 (evax_rec
+8);
326 symbol
->section
= (asection
*)((unsigned long) bfd_getl32 (evax_rec
+28));
328 evax_debug(3, "egsd sym def #%d (%s, %d, %04x=%s)\n", abfd
->symcount
,
329 symbol
->name
, (int)symbol
->section
, old_flags
, flag2str(gsyflagdesc
, old_flags
));
332 else /* symbol reference */
335 _bfd_evax_save_counted_string ((char *)evax_rec
+8);
337 evax_debug(3, "egsd sym ref #%d (%s, %04x=%s)\n", abfd
->symcount
,
338 symbol
->name
, old_flags
, flag2str(gsyflagdesc
, old_flags
));
340 symbol
->section
= bfd_make_section (abfd
, BFD_UND_SECTION_NAME
);
343 symbol
->flags
= new_flags
;
345 /* save symbol in evax_symbol_table */
347 entry
= (evax_symbol_entry
*) bfd_hash_lookup (PRIV(evax_symbol_table
), symbol
->name
, true, false);
348 if (entry
== (evax_symbol_entry
*)NULL
)
350 bfd_set_error (bfd_error_no_memory
);
353 if (entry
->symbol
!= (asymbol
*)NULL
)
354 { /* FIXME ?, DEC C generates this */
356 evax_debug(3, "EGSD_S_C_SYM: duplicate \"%s\"\n", symbol
->name
);
361 entry
->symbol
= symbol
;
362 PRIV(egsd_sym_count
)++;
372 (*_bfd_error_handler
) ("unknown egsd subtype %d", gsd_type
);
373 bfd_set_error (bfd_error_bad_value
);
378 PRIV(rec_size
) -= gsd_size
;
379 PRIV(evax_rec
) += gsd_size
;
381 } /* while (recsize > 0) */
383 if (abfd
->symcount
> 0)
384 abfd
->flags
|= HAS_SYMS
;
389 /*-----------------------------------------------------------------------------*/
390 /* output routines */
392 /* Write section and symbol directory of bfd abfd */
395 _bfd_evax_write_egsd (abfd
)
404 flagword new_flags
, old_flags
;
408 evax_debug (2, "evax_write_egsd(%p)\n", abfd
);
411 /* output sections */
413 section
= abfd
->sections
;
415 evax_debug (3, "%d sections found\n", abfd
->section_count
);
418 /* egsd is quadword aligned */
420 _bfd_evax_output_alignment (abfd
, 8);
422 _bfd_evax_output_begin (abfd
, EOBJ_S_C_EGSD
, -1);
423 _bfd_evax_output_long (abfd
, 0);
424 _bfd_evax_output_push (abfd
); /* prepare output for subrecords */
429 evax_debug (3, "Section #%d %s, %d bytes\n", section
->index
, section
->name
, (int)section
->_raw_size
);
432 /* 13 bytes egsd, max 31 chars name -> should be 44 bytes */
433 if (_bfd_evax_output_check (abfd
, 64) < 0)
435 _bfd_evax_output_pop (abfd
);
436 _bfd_evax_output_end (abfd
);
437 _bfd_evax_output_begin (abfd
, EOBJ_S_C_EGSD
, -1);
438 _bfd_evax_output_long (abfd
, 0);
439 _bfd_evax_output_push (abfd
); /* prepare output for subrecords */
442 /* Create dummy sections to keep consecutive indices */
444 while (section
->index
- last_index
> 1)
447 evax_debug (3, "index %d, last %d\n", section
->index
, last_index
);
449 _bfd_evax_output_begin (abfd
, EGSD_S_C_PSC
, -1);
450 _bfd_evax_output_short (abfd
, 0);
451 _bfd_evax_output_short (abfd
, 0);
452 _bfd_evax_output_long (abfd
, 0);
453 sprintf (dummy_name
, ".DUMMY%02d", last_index
);
454 _bfd_evax_output_counted (abfd
, dummy_name
);
455 _bfd_evax_output_flush (abfd
);
459 /* Don't know if this is neccesary for the linker but for now it keeps
460 evax_slurp_egsd happy */
462 sname
= (char *)section
->name
;
466 if ((*sname
== 't') && (strcmp (sname
, "text") == 0))
467 sname
= EVAX_CODE_NAME
;
468 else if ((*sname
== 'd') && (strcmp (sname
, "data") == 0))
469 sname
= EVAX_DATA_NAME
;
470 else if ((*sname
== 'b') && (strcmp (sname
, "bss") == 0))
471 sname
= EVAX_BSS_NAME
;
472 else if ((*sname
== 'l') && (strcmp (sname
, "link") == 0))
473 sname
= EVAX_LINK_NAME
;
474 else if ((*sname
== 'r') && (strcmp (sname
, "rdata") == 0))
475 sname
= EVAX_READONLY_NAME
;
476 else if ((*sname
== 'l') && (strcmp (sname
, "literal") == 0))
477 sname
= EVAX_LITERAL_NAME
;
478 else if ((*sname
== 'c') && (strcmp (sname
, "comm") == 0))
479 sname
= EVAX_COMMON_NAME
;
480 else if ((*sname
== 'l') && (strcmp (sname
, "lcomm") == 0))
481 sname
= EVAX_LOCAL_NAME
;
484 sname
= _bfd_evax_length_hash_symbol (abfd
, sname
, EOBJ_S_C_SECSIZ
);
486 _bfd_evax_output_begin (abfd
, EGSD_S_C_PSC
, -1);
487 _bfd_evax_output_short (abfd
, section
->alignment_power
& 0xff);
488 if (bfd_is_com_section (section
))
490 new_flags
= (EGPS_S_V_OVR
|EGPS_S_V_REL
|EGPS_S_V_GBL
|EGPS_S_V_RD
|EGPS_S_V_WRT
|EGPS_S_V_NOMOD
|EGPS_S_V_COM
);
494 new_flags
= evax_esecflag_by_name (sname
, section
->_raw_size
);
496 _bfd_evax_output_short (abfd
, new_flags
);
497 _bfd_evax_output_long (abfd
, section
->_raw_size
);
498 _bfd_evax_output_counted (abfd
, sname
);
499 _bfd_evax_output_flush (abfd
);
501 last_index
= section
->index
;
502 section
= section
->next
;
508 evax_debug (3, "%d symbols found\n", abfd
->symcount
);
511 bfd_set_start_address (abfd
, (bfd_vma
)-1);
513 for (symnum
= 0; symnum
< abfd
->symcount
; symnum
++)
516 symbol
= abfd
->outsymbols
[symnum
];
517 if (*(symbol
->name
) == '_')
519 if (strcmp (symbol
->name
, "__main") == 0)
520 bfd_set_start_address (abfd
, (bfd_vma
)symbol
->value
);
522 old_flags
= symbol
->flags
;
524 if (old_flags
& BSF_FILE
)
527 if (((old_flags
& (BSF_GLOBAL
|BSF_WEAK
)) == 0) /* not xdef */
528 && (!bfd_is_und_section (symbol
->section
))) /* and not xref */
529 continue; /* dont output */
531 /* 13 bytes egsd, max 64 chars name -> should be 77 bytes */
533 if (_bfd_evax_output_check (abfd
, 80) < 0)
535 _bfd_evax_output_pop (abfd
);
536 _bfd_evax_output_end (abfd
);
537 _bfd_evax_output_begin (abfd
, EOBJ_S_C_EGSD
, -1);
538 _bfd_evax_output_long (abfd
, 0);
539 _bfd_evax_output_push (abfd
); /* prepare output for subrecords */
542 _bfd_evax_output_begin (abfd
, EGSD_S_C_SYM
, -1);
544 _bfd_evax_output_short (abfd
, 0); /* data type, alignment */
548 if (old_flags
& BSF_WEAK
)
549 new_flags
|= EGSY_S_V_WEAK
;
550 if (bfd_is_com_section (symbol
->section
)) /* .comm */
551 new_flags
|= (EGSY_S_V_WEAK
|EGSY_S_V_COMM
);
553 if (old_flags
& BSF_FUNCTION
)
555 new_flags
|= EGSY_S_V_NORM
;
556 new_flags
|= EGSY_S_V_REL
;
558 if (old_flags
& (BSF_GLOBAL
|BSF_WEAK
))
560 new_flags
|= EGSY_S_V_DEF
;
561 if (!bfd_is_abs_section (symbol
->section
))
562 new_flags
|= EGSY_S_V_REL
;
564 _bfd_evax_output_short (abfd
, new_flags
);
566 if (old_flags
& (BSF_GLOBAL
|BSF_WEAK
)) /* symbol definition */
568 if (old_flags
& BSF_FUNCTION
)
570 _bfd_evax_output_quad (abfd
, symbol
->value
);
571 _bfd_evax_output_quad (abfd
,
572 ((asymbol
*)(symbol
->udata
.p
))->value
);
573 _bfd_evax_output_long (abfd
,
574 (((asymbol
*)(symbol
->udata
.p
))
576 _bfd_evax_output_long (abfd
, symbol
->section
->index
);
580 _bfd_evax_output_quad (abfd
, symbol
->value
); /* L_VALUE */
581 _bfd_evax_output_quad (abfd
, 0); /* L_CODE_ADDRESS */
582 _bfd_evax_output_long (abfd
, 0); /* L_CA_PSINDX */
583 _bfd_evax_output_long (abfd
, symbol
->section
->index
);/* L_PSINDX */
586 _bfd_evax_output_counted (abfd
, _bfd_evax_length_hash_symbol (abfd
, symbol
->name
, EOBJ_S_C_SYMSIZ
));
588 _bfd_evax_output_flush (abfd
);
592 _bfd_evax_output_alignment (abfd
, 8);
593 _bfd_evax_output_pop (abfd
);
594 _bfd_evax_output_end (abfd
);