1 /* evax-egsd.c -- BFD back-end for ALPHA EVAX (openVMS/AXP) files.
2 Copyright 1996 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 Kämpf (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 "$LITERAL$"
47 struct sec_flags_struct
{
48 char *name
; /* name of section */
50 flagword flags_always
; /* flags we set always */
52 flagword flags_hassize
; /* flags we set if the section has a size > 0 */
55 /* just a dummy flag array since i don't understand it yet */
57 static struct sec_flags_struct evax_section_flags
[] = {
62 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_LOAD
) },
64 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_SHR
|EGPS_S_V_EXE
),
66 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_SHR
|EGPS_S_V_EXE
),
67 (SEC_IN_MEMORY
|SEC_CODE
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_LOAD
) },
69 (EGPS_S_V_REL
|EGPS_S_V_RD
),
70 (SEC_DATA
|SEC_READONLY
),
71 (EGPS_S_V_REL
|EGPS_S_V_RD
),
72 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_READONLY
|SEC_LOAD
) },
74 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
),
76 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
),
77 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_LOAD
) },
79 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
|EGPS_S_V_NOMOD
),
81 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
|EGPS_S_V_NOMOD
),
82 (SEC_IN_MEMORY
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_LOAD
) },
84 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_SHR
|EGPS_S_V_RD
),
85 (SEC_DATA
|SEC_READONLY
),
86 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_SHR
|EGPS_S_V_RD
),
87 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_READONLY
|SEC_LOAD
) },
89 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_SHR
|EGPS_S_V_RD
),
90 (SEC_DATA
|SEC_READONLY
),
91 (EGPS_S_V_PIC
|EGPS_S_V_REL
|EGPS_S_V_SHR
|EGPS_S_V_RD
),
92 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_READONLY
|SEC_LOAD
) },
94 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
),
96 (EGPS_S_V_REL
|EGPS_S_V_RD
|EGPS_S_V_WRT
),
97 (SEC_IN_MEMORY
|SEC_DATA
|SEC_HAS_CONTENTS
|SEC_ALLOC
|SEC_LOAD
) }
100 /* Retrieve bfd section flags by name and size */
103 evax_secflag_by_name(name
, size
)
109 while (evax_section_flags
[i
].name
!= NULL
)
111 if (strcmp (name
, evax_section_flags
[i
].name
) == 0)
114 return evax_section_flags
[i
].flags_hassize
;
116 return evax_section_flags
[i
].flags_always
;
121 return evax_section_flags
[i
].flags_hassize
;
122 return evax_section_flags
[i
].flags_always
;
126 /* Retrieve evax section flags by name and size */
129 evax_esecflag_by_name(name
, size
)
135 while (evax_section_flags
[i
].name
!= NULL
)
137 if (strcmp (name
, evax_section_flags
[i
].name
) == 0)
140 return evax_section_flags
[i
].eflags_hassize
;
142 return evax_section_flags
[i
].eflags_always
;
147 return evax_section_flags
[i
].eflags_hassize
;
148 return evax_section_flags
[i
].eflags_always
;
151 /*-----------------------------------------------------------------------------*/
155 struct flagdescstruct
{ char *name
; flagword value
; };
157 /* Convert flag to printable string */
160 flag2str(flagdesc
, flags
)
161 struct flagdescstruct
*flagdesc
;
169 while (flagdesc
->name
!= NULL
)
171 if ((flags
& flagdesc
->value
) != 0)
177 strcat (res
, flagdesc
->name
);
185 /*-----------------------------------------------------------------------------*/
188 /* Process EGSD record
189 return 0 on success, -1 on error */
192 _bfd_evax_slurp_egsd (abfd
)
196 static struct flagdescstruct gpsflagdesc
[] =
213 static struct flagdescstruct gsyflagdesc
[] =
226 int gsd_type
, gsd_size
;
228 unsigned char *evax_rec
;
229 flagword new_flags
, old_flags
;
232 evax_symbol_entry
*entry
;
233 unsigned long base_addr
;
234 unsigned long align_addr
;
237 evax_debug (2, "EGSD\n");
240 PRIV(evax_rec
) += 8; /* skip type, size, l_temp */
243 /* calculate base address for each section */
248 while (PRIV(rec_size
) > 0)
250 evax_rec
= PRIV(evax_rec
);
251 _bfd_evax_get_header_values (abfd
, evax_rec
, &gsd_type
, &gsd_size
);
256 /* program section definition */
258 name
= _bfd_evax_save_counted_string ((char *)evax_rec
+12);
259 section
= bfd_make_section (abfd
, name
);
262 old_flags
= bfd_getl16 (evax_rec
+ 6);
263 section
->_raw_size
= bfd_getl32 (evax_rec
+ 8); /* allocation */
264 new_flags
= evax_secflag_by_name (name
, (int) section
->_raw_size
);
265 if (old_flags
& EGPS_S_V_REL
)
266 new_flags
|= SEC_RELOC
;
267 if (!bfd_set_section_flags (abfd
, section
, new_flags
))
269 section
->alignment_power
= evax_rec
[4];
270 align_addr
= (1 << section
->alignment_power
);
271 if ((base_addr
% align_addr
) != 0)
272 base_addr
+= (align_addr
- (base_addr
% align_addr
));
273 section
->vma
= (bfd_vma
)base_addr
;
274 base_addr
+= section
->_raw_size
;
275 section
->contents
= ((unsigned char *)
276 bfd_malloc (section
->_raw_size
));
277 if (section
->contents
== NULL
)
279 memset (section
->contents
, 0, (size_t) section
->_raw_size
);
280 section
->_cooked_size
= section
->_raw_size
;
282 evax_debug(3, "egsd psc %d (%s, flags %04x=%s) ",
283 section
->index
, name
, old_flags
, flag2str(gpsflagdesc
, old_flags
));
284 evax_debug(3, "%d bytes at 0x%08lx (mem %p)\n",
285 section
->_raw_size
, section
->vma
, section
->contents
);
292 /* symbol specification (definition or reference) */
294 symbol
= _bfd_evax_make_empty_symbol (abfd
);
298 old_flags
= bfd_getl16 (evax_rec
+ 6);
299 new_flags
= BSF_NO_FLAGS
;
301 if (old_flags
& EGSY_S_V_WEAK
)
302 new_flags
|= BSF_WEAK
;
304 if (evax_rec
[6] & EGSY_S_V_DEF
) /* symbol definition */
307 _bfd_evax_save_counted_string ((char *)evax_rec
+32);
308 if (old_flags
& EGSY_S_V_NORM
)
310 new_flags
|= BSF_FUNCTION
;
312 symbol
->value
= bfd_getl64 (evax_rec
+8);
313 symbol
->section
= (asection
*)((unsigned long) bfd_getl32 (evax_rec
+28));
315 evax_debug(3, "egsd sym def #%d (%s, %d, %04x=%s)\n", abfd
->symcount
,
316 symbol
->name
, (int)symbol
->section
, old_flags
, flag2str(gsyflagdesc
, old_flags
));
319 else /* symbol reference */
322 _bfd_evax_save_counted_string ((char *)evax_rec
+8);
324 evax_debug(3, "egsd sym ref #%d (%s, %04x=%s)\n", abfd
->symcount
,
325 symbol
->name
, old_flags
, flag2str(gsyflagdesc
, old_flags
));
327 symbol
->section
= bfd_make_section (abfd
, BFD_UND_SECTION_NAME
);
330 symbol
->flags
= new_flags
;
332 /* save symbol in evax_symbol_table */
334 entry
= (evax_symbol_entry
*) bfd_hash_lookup (PRIV(evax_symbol_table
), symbol
->name
, true, false);
335 if (entry
== (evax_symbol_entry
*)NULL
)
337 bfd_set_error (bfd_error_no_memory
);
340 if (entry
->symbol
!= (asymbol
*)NULL
)
341 { /* FIXME ?, DEC C generates this */
343 evax_debug(3, "EGSD_S_C_SYM: duplicate \"%s\"\n", symbol
->name
);
348 entry
->symbol
= symbol
;
349 PRIV(egsd_sym_count
)++;
359 (*_bfd_error_handler
) ("unknown egsd subtype %d", gsd_type
);
360 bfd_set_error (bfd_error_bad_value
);
365 PRIV(rec_size
) -= gsd_size
;
366 PRIV(evax_rec
) += gsd_size
;
368 } /* while (recsize > 0) */
370 if (abfd
->symcount
> 0)
371 abfd
->flags
|= HAS_SYMS
;
376 /*-----------------------------------------------------------------------------*/
377 /* output routines */
379 /* Write section and symbol directory of bfd abfd */
382 _bfd_evax_write_egsd (abfd
)
391 flagword new_flags
, old_flags
;
396 evax_debug (2, "evax_write_egsd(%p)\n", abfd
);
399 /* output sections */
401 section
= abfd
->sections
;
403 evax_debug (3, "%d sections found\n", abfd
->section_count
);
406 /* egsd is quadword aligned */
408 _bfd_evax_output_alignment (abfd
, 8);
410 _bfd_evax_output_begin (abfd
, EOBJ_S_C_EGSD
, -1);
411 _bfd_evax_output_long (abfd
, 0);
412 _bfd_evax_output_push (abfd
); /* prepare output for subrecords */
417 evax_debug (3, "Section #%d %s, %d bytes\n", section
->index
, section
->name
, (int)section
->_raw_size
);
420 /* 13 bytes egsd, max 31 chars name -> should be 44 bytes */
421 if (_bfd_evax_output_check (abfd
, 64) < 0)
423 _bfd_evax_output_pop (abfd
);
424 _bfd_evax_output_end (abfd
);
425 _bfd_evax_output_begin (abfd
, EOBJ_S_C_EGSD
, -1);
426 _bfd_evax_output_long (abfd
, 0);
427 _bfd_evax_output_push (abfd
); /* prepare output for subrecords */
430 /* Create dummy sections to keep consecutive indices */
432 while (section
->index
- last_index
> 1)
435 evax_debug (3, "index %d, last %d\n", section
->index
, last_index
);
437 _bfd_evax_output_begin (abfd
, EGSD_S_C_PSC
, -1);
438 _bfd_evax_output_short (abfd
, 0);
439 _bfd_evax_output_short (abfd
, 0);
440 _bfd_evax_output_long (abfd
, 0);
441 sprintf (dummy_name
, ".DUMMY%02d", last_index
);
442 _bfd_evax_output_counted (abfd
, dummy_name
);
443 _bfd_evax_output_flush (abfd
);
447 /* Don't know if this is neccesary for the linker but for now it keeps
448 evax_slurp_egsd happy */
450 sname
= (char *)section
->name
;
454 if ((*sname
== 't') && (strcmp (sname
, "text") == 0))
455 sname
= EVAX_CODE_NAME
;
456 else if ((*sname
== 'd') && (strcmp (sname
, "data") == 0))
457 sname
= EVAX_DATA_NAME
;
458 else if ((*sname
== 'b') && (strcmp (sname
, "bss") == 0))
459 sname
= EVAX_BSS_NAME
;
460 else if ((*sname
== 'l') && (strcmp (sname
, "link") == 0))
461 sname
= EVAX_LINK_NAME
;
462 else if ((*sname
== 'r') && (strcmp (sname
, "rdata") == 0))
463 sname
= EVAX_READONLY_NAME
;
464 else if ((*sname
== 'l') && (strcmp (sname
, "literal") == 0))
465 sname
= EVAX_LITERAL_NAME
;
468 _bfd_evax_output_begin (abfd
, EGSD_S_C_PSC
, -1);
469 _bfd_evax_output_short (abfd
, section
->alignment_power
& 0xff);
470 _bfd_evax_output_short (abfd
,
471 evax_esecflag_by_name (sname
,
472 section
->_raw_size
));
473 _bfd_evax_output_long (abfd
, section
->_raw_size
);
474 _bfd_evax_output_counted (abfd
, sname
);
475 _bfd_evax_output_flush (abfd
);
477 last_index
= section
->index
;
478 section
= section
->next
;
484 evax_debug (3, "%d symbols found\n", abfd
->symcount
);
487 bfd_set_start_address (abfd
, (bfd_vma
)-1);
489 for (symnum
= 0; symnum
< abfd
->symcount
; symnum
++)
492 symbol
= abfd
->outsymbols
[symnum
];
493 if (*(symbol
->name
) == '_')
495 if (strcmp (symbol
->name
, "__main") == 0)
496 bfd_set_start_address (abfd
, (bfd_vma
)symbol
->value
);
498 old_flags
= symbol
->flags
;
500 if (old_flags
& BSF_FILE
)
503 if (((old_flags
& BSF_GLOBAL
) == 0) /* not xdef */
504 && (!bfd_is_und_section (symbol
->section
))) /* and not xref */
505 continue; /* dont output */
507 /* 13 bytes egsd, max 64 chars name -> should be 77 bytes */
509 if (_bfd_evax_output_check (abfd
, 80) < 0)
511 _bfd_evax_output_pop (abfd
);
512 _bfd_evax_output_end (abfd
);
513 _bfd_evax_output_begin (abfd
, EOBJ_S_C_EGSD
, -1);
514 _bfd_evax_output_long (abfd
, 0);
515 _bfd_evax_output_push (abfd
); /* prepare output for subrecords */
518 _bfd_evax_output_begin (abfd
, EGSD_S_C_SYM
, -1);
520 _bfd_evax_output_short (abfd
, 0); /* data type, alignment */
523 if (old_flags
& BSF_WEAK
)
524 new_flags
|= EGSY_S_V_WEAK
;
525 if (old_flags
& BSF_FUNCTION
)
527 new_flags
|= EGSY_S_V_NORM
;
528 new_flags
|= EGSY_S_V_REL
;
530 if (old_flags
& BSF_GLOBAL
)
532 new_flags
|= EGSY_S_V_DEF
;
533 if (!bfd_is_abs_section (symbol
->section
))
534 new_flags
|= EGSY_S_V_REL
;
536 _bfd_evax_output_short (abfd
, new_flags
);
538 if (old_flags
& BSF_GLOBAL
) /* symbol definition */
540 if (old_flags
& BSF_FUNCTION
)
542 _bfd_evax_output_quad (abfd
, symbol
->value
);
543 _bfd_evax_output_quad (abfd
,
544 ((asymbol
*)(symbol
->udata
.p
))->value
);
545 _bfd_evax_output_long (abfd
,
546 (((asymbol
*)(symbol
->udata
.p
))
548 _bfd_evax_output_long (abfd
, symbol
->section
->index
);
552 _bfd_evax_output_quad (abfd
, symbol
->value
); /* L_VALUE */
553 _bfd_evax_output_quad (abfd
, 0); /* L_CODE_ADDRESS */
554 _bfd_evax_output_long (abfd
, 0); /* L_CA_PSINDX */
555 _bfd_evax_output_long (abfd
, symbol
->section
->index
);/* L_PSINDX, FIXME */
558 _bfd_evax_output_counted (abfd
, _bfd_evax_case_hack_symbol (abfd
, symbol
->name
));
560 _bfd_evax_output_flush (abfd
);
564 _bfd_evax_output_alignment (abfd
, 8);
565 _bfd_evax_output_pop (abfd
);
566 _bfd_evax_output_end (abfd
);