Commit | Line | Data |
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252b5132 | 1 | /* BFD backend for hp-ux 9000/300 |
7898deda NC |
2 | Copyright 1990, 1991, 1993, 1994, 1995, 1997, 2000, 2001 |
3 | Free Software Foundation, Inc. | |
252b5132 RH |
4 | Written by Glenn Engel. |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | /* | |
252b5132 RH |
23 | hpux native ------------> | | |
24 | | hp300hpux bfd | ----------> hpux w/gnu ext | |
25 | hpux w/gnu extension ----> | | | |
26 | ||
252b5132 RH |
27 | Support for the 9000/[34]00 has several limitations. |
28 | 1. Shared libraries are not supported. | |
29 | 2. The output format from this bfd is not usable by native tools. | |
30 | ||
31 | The primary motivation for writing this bfd was to allow use of | |
32 | gdb and gcc for host based debugging and not to mimic the hp-ux tools | |
33 | in every detail. This leads to a significant simplification of the | |
34 | code and a leap in performance. The decision to not output hp native | |
35 | compatible objects was further strengthened by the fact that the richness | |
36 | of the gcc compiled objects could not be represented without loss of | |
37 | information. For example, while the hp format supports the concept of | |
38 | secondary symbols, it does not support indirect symbols. Another | |
39 | reason is to maintain backwards compatibility with older implementations | |
40 | of gcc on hpux which used 'hpxt' to translate .a and .o files into a | |
41 | format which could be readily understood by the gnu linker and gdb. | |
42 | This allows reading hp secondary symbols and converting them into | |
43 | indirect symbols but the reverse it not always possible. | |
44 | ||
45 | Another example of differences is that the hp format stores symbol offsets | |
46 | in the object code while the gnu utilities use a field in the | |
47 | relocation record for this. To support the hp native format, the object | |
48 | code would need to be patched with the offsets when producing .o files. | |
49 | ||
50 | The basic technique taken in this implementation is to #include the code | |
51 | from aoutx.h and aout-target.h with appropriate #defines to override | |
52 | code where a unique implementation is needed: | |
53 | ||
54 | { | |
55 | #define a bunch of stuff | |
56 | #include <aoutx.h> | |
57 | ||
58 | implement a bunch of functions | |
59 | ||
60 | #include "aout-target.h" | |
61 | } | |
62 | ||
63 | The hp symbol table is a bit different than other a.out targets. Instead | |
64 | of having an array of nlist items and an array of strings, hp's format | |
65 | has them mixed together in one structure. In addition, the strings are | |
66 | not null terminated. It looks something like this: | |
67 | ||
68 | nlist element 1 | |
69 | string1 | |
70 | nlist element 2 | |
71 | string2 | |
72 | ... | |
73 | ||
74 | The whole symbol table is read as one chunk and then we march thru it | |
75 | and convert it to canonical form. As we march thru the table, we copy | |
76 | the nlist data into the internal form and we compact the strings and null | |
77 | terminate them, using storage from the already allocated symbol table: | |
78 | ||
79 | string1 | |
80 | null | |
81 | string2 | |
82 | null | |
83 | */ | |
84 | ||
85 | /* @@ Is this really so different from normal a.out that it needs to include | |
86 | aoutx.h? We should go through this file sometime and see what can be made | |
87 | more dependent on aout32.o and what might need to be broken off and accessed | |
88 | through the backend_data field. Or, maybe we really do need such a | |
89 | completely separate implementation. I don't have time to investigate this | |
90 | much further right now. [raeburn:19930428.2124EST] */ | |
91 | /* @@ Also, note that there wind up being two versions of some routines, with | |
92 | different names, only one of which actually gets used. For example: | |
93 | slurp_symbol_table | |
94 | swap_std_reloc_in | |
95 | slurp_reloc_table | |
96 | get_symtab | |
97 | get_symtab_upper_bound | |
98 | canonicalize_reloc | |
99 | mkobject | |
100 | This should also be fixed. */ | |
101 | ||
102 | #define TARGETNAME "a.out-hp300hpux" | |
103 | #define MY(OP) CAT(hp300hpux_,OP) | |
104 | ||
105 | #define external_exec hp300hpux_exec_bytes | |
106 | #define external_nlist hp300hpux_nlist_bytes | |
107 | ||
108 | #include "aout/hp300hpux.h" | |
109 | ||
110 | /* define these so we can compile unused routines in aoutx.h */ | |
111 | #define e_strx e_shlib | |
112 | #define e_other e_length | |
113 | #define e_desc e_almod | |
114 | ||
115 | #define AR_PAD_CHAR '/' | |
116 | #define TARGET_IS_BIG_ENDIAN_P | |
117 | #define DEFAULT_ARCH bfd_arch_m68k | |
118 | ||
119 | #define MY_get_section_contents aout_32_get_section_contents | |
120 | #define MY_slurp_armap bfd_slurp_bsd_armap_f2 | |
121 | ||
122 | /***********************************************/ | |
123 | /* provide overrides for routines in this file */ | |
124 | /***********************************************/ | |
125 | /* these don't use MY because that causes problems within JUMP_TABLE | |
126 | (CAT winds up being expanded recursively, which ANSI C compilers | |
127 | will not do). */ | |
128 | #define MY_get_symtab hp300hpux_get_symtab | |
129 | #define MY_get_symtab_upper_bound hp300hpux_get_symtab_upper_bound | |
130 | #define MY_canonicalize_reloc hp300hpux_canonicalize_reloc | |
131 | #define MY_write_object_contents hp300hpux_write_object_contents | |
132 | ||
133 | #define MY_read_minisymbols _bfd_generic_read_minisymbols | |
134 | #define MY_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol | |
135 | ||
136 | #define MY_bfd_link_hash_table_create _bfd_generic_link_hash_table_create | |
137 | #define MY_bfd_link_add_symbols _bfd_generic_link_add_symbols | |
138 | #define MY_final_link_callback unused | |
139 | #define MY_bfd_final_link _bfd_generic_final_link | |
140 | ||
141 | /* Until and unless we convert the slurp_reloc and slurp_symtab | |
142 | routines in this file, we can not use the default aout | |
143 | free_cached_info routine which assumes that the relocs and symtabs | |
144 | were allocated using malloc. */ | |
145 | #define MY_bfd_free_cached_info bfd_true | |
146 | ||
147 | #define hp300hpux_write_syms aout_32_write_syms | |
148 | ||
149 | #define MY_callback MY(callback) | |
150 | ||
151 | #define MY_exec_hdr_flags 0x2 | |
152 | ||
153 | #define NAME_swap_exec_header_in NAME(hp300hpux_32_,swap_exec_header_in) | |
154 | ||
155 | #define HP_SYMTYPE_UNDEFINED 0x00 | |
156 | #define HP_SYMTYPE_ABSOLUTE 0x01 | |
157 | #define HP_SYMTYPE_TEXT 0x02 | |
158 | #define HP_SYMTYPE_DATA 0x03 | |
159 | #define HP_SYMTYPE_BSS 0x04 | |
160 | #define HP_SYMTYPE_COMMON 0x05 | |
161 | ||
162 | #define HP_SYMTYPE_TYPE 0x0F | |
163 | #define HP_SYMTYPE_FILENAME 0x1F | |
164 | ||
165 | #define HP_SYMTYPE_ALIGN 0x10 | |
166 | #define HP_SYMTYPE_EXTERNAL 0x20 | |
167 | #define HP_SECONDARY_SYMBOL 0x40 | |
168 | ||
169 | /* RELOCATION DEFINITIONS */ | |
170 | #define HP_RSEGMENT_TEXT 0x00 | |
171 | #define HP_RSEGMENT_DATA 0x01 | |
172 | #define HP_RSEGMENT_BSS 0x02 | |
173 | #define HP_RSEGMENT_EXTERNAL 0x03 | |
174 | #define HP_RSEGMENT_PCREL 0x04 | |
175 | #define HP_RSEGMENT_RDLT 0x05 | |
176 | #define HP_RSEGMENT_RPLT 0x06 | |
177 | #define HP_RSEGMENT_NOOP 0x3F | |
178 | ||
179 | #define HP_RLENGTH_BYTE 0x00 | |
180 | #define HP_RLENGTH_WORD 0x01 | |
181 | #define HP_RLENGTH_LONG 0x02 | |
182 | #define HP_RLENGTH_ALIGN 0x03 | |
183 | ||
184 | #define NAME(x,y) CAT3(hp300hpux,_32_,y) | |
185 | #define ARCH_SIZE 32 | |
186 | ||
187 | /* aoutx.h requires definitions for BMAGIC and QMAGIC. */ | |
188 | #define BMAGIC HPUX_DOT_O_MAGIC | |
189 | #define QMAGIC 0314 | |
190 | ||
191 | #include "aoutx.h" | |
192 | ||
e4b17274 NC |
193 | static const bfd_target * MY (callback) PARAMS ((bfd *)); |
194 | static boolean MY (write_object_contents) PARAMS ((bfd *)); | |
195 | static void convert_sym_type PARAMS ((struct external_nlist *, aout_symbol_type *, bfd *)); | |
196 | ||
197 | boolean MY (slurp_symbol_table) PARAMS ((bfd *)); | |
198 | void MY (swap_std_reloc_in) PARAMS ((bfd *, struct hp300hpux_reloc *, arelent *, asymbol **, bfd_size_type)); | |
199 | boolean MY (slurp_reloc_table) PARAMS ((bfd *, sec_ptr, asymbol **)); | |
200 | long MY (get_symtab) PARAMS ((bfd *, asymbol **)); | |
201 | long MY (get_symtab_upper_bound) PARAMS ((bfd *)); | |
202 | long MY (canonicalize_reloc) PARAMS ((bfd *, sec_ptr, arelent **, asymbol **)); | |
203 | ||
252b5132 RH |
204 | /* Since the hpux symbol table has nlist elements interspersed with |
205 | strings and we need to insert som strings for secondary symbols, we | |
206 | give ourselves a little extra padding up front to account for | |
207 | this. Note that for each non-secondary symbol we process, we gain | |
208 | 9 bytes of space for the discarded nlist element (one byte used for | |
209 | null). SYM_EXTRA_BYTES is the extra space. */ | |
210 | #define SYM_EXTRA_BYTES 1024 | |
211 | ||
212 | /* Set parameters about this a.out file that are machine-dependent. | |
213 | This routine is called from some_aout_object_p just before it returns. */ | |
214 | static const bfd_target * | |
215 | MY (callback) (abfd) | |
216 | bfd *abfd; | |
217 | { | |
218 | struct internal_exec *execp = exec_hdr (abfd); | |
219 | ||
220 | /* Calculate the file positions of the parts of a newly read aout header */ | |
221 | obj_textsec (abfd)->_raw_size = N_TXTSIZE (*execp); | |
222 | ||
223 | /* The virtual memory addresses of the sections */ | |
224 | obj_textsec (abfd)->vma = N_TXTADDR (*execp); | |
225 | obj_datasec (abfd)->vma = N_DATADDR (*execp); | |
226 | obj_bsssec (abfd)->vma = N_BSSADDR (*execp); | |
227 | ||
228 | obj_textsec (abfd)->lma = obj_textsec (abfd)->vma; | |
229 | obj_datasec (abfd)->lma = obj_datasec (abfd)->vma; | |
230 | obj_bsssec (abfd)->lma = obj_bsssec (abfd)->vma; | |
231 | ||
232 | /* The file offsets of the sections */ | |
233 | obj_textsec (abfd)->filepos = N_TXTOFF (*execp); | |
234 | obj_datasec (abfd)->filepos = N_DATOFF (*execp); | |
235 | ||
236 | /* The file offsets of the relocation info */ | |
237 | obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp); | |
238 | obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp); | |
239 | ||
240 | /* The file offsets of the string table and symbol table. */ | |
241 | obj_sym_filepos (abfd) = N_SYMOFF (*execp); | |
242 | obj_str_filepos (abfd) = N_STROFF (*execp); | |
243 | ||
244 | /* Determine the architecture and machine type of the object file. */ | |
245 | #ifdef SET_ARCH_MACH | |
246 | SET_ARCH_MACH (abfd, *execp); | |
247 | #else | |
248 | bfd_default_set_arch_mach (abfd, DEFAULT_ARCH, 0); | |
249 | #endif | |
250 | ||
252b5132 RH |
251 | if (obj_aout_subformat (abfd) == gnu_encap_format) |
252 | { | |
253 | /* The file offsets of the relocation info */ | |
254 | obj_textsec (abfd)->rel_filepos = N_GNU_TRELOFF (*execp); | |
255 | obj_datasec (abfd)->rel_filepos = N_GNU_DRELOFF (*execp); | |
256 | ||
257 | /* The file offsets of the string table and symbol table. */ | |
258 | obj_sym_filepos (abfd) = N_GNU_SYMOFF (*execp); | |
259 | obj_str_filepos (abfd) = (obj_sym_filepos (abfd) + execp->a_syms); | |
260 | ||
261 | abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; | |
262 | bfd_get_symcount (abfd) = execp->a_syms / 12; | |
263 | obj_symbol_entry_size (abfd) = 12; | |
264 | obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; | |
265 | } | |
266 | ||
267 | return abfd->xvec; | |
268 | } | |
269 | ||
270 | extern boolean aout_32_write_syms PARAMS ((bfd * abfd)); | |
271 | ||
272 | static boolean | |
273 | MY (write_object_contents) (abfd) | |
274 | bfd *abfd; | |
275 | { | |
276 | struct external_exec exec_bytes; | |
277 | struct internal_exec *execp = exec_hdr (abfd); | |
278 | bfd_size_type text_size; /* dummy vars */ | |
279 | file_ptr text_end; | |
280 | ||
281 | memset (&exec_bytes, 0, sizeof (exec_bytes)); | |
8ba8a462 | 282 | |
252b5132 | 283 | obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; |
252b5132 RH |
284 | |
285 | if (adata (abfd).magic == undecided_magic) | |
286 | NAME (aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end); | |
287 | execp->a_syms = 0; | |
288 | ||
289 | execp->a_entry = bfd_get_start_address (abfd); | |
290 | ||
291 | execp->a_trsize = ((obj_textsec (abfd)->reloc_count) * | |
292 | obj_reloc_entry_size (abfd)); | |
293 | execp->a_drsize = ((obj_datasec (abfd)->reloc_count) * | |
294 | obj_reloc_entry_size (abfd)); | |
295 | ||
296 | N_SET_MACHTYPE (*execp, 0xc); | |
297 | N_SET_FLAGS (*execp, aout_backend_info (abfd)->exec_hdr_flags); | |
298 | ||
299 | NAME (aout,swap_exec_header_out) (abfd, execp, &exec_bytes); | |
300 | ||
301 | /* update fields not covered by default swap_exec_header_out */ | |
302 | ||
303 | /* this is really the sym table size but we store it in drelocs */ | |
dc810e39 | 304 | H_PUT_32 (abfd, (bfd_get_symcount (abfd) * 12), exec_bytes.e_drelocs); |
252b5132 | 305 | |
dc810e39 AM |
306 | if (bfd_seek (abfd, (file_ptr) 0, false) != 0 |
307 | || (bfd_bwrite ((PTR) &exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE, abfd) | |
252b5132 RH |
308 | != EXEC_BYTES_SIZE)) |
309 | return false; | |
310 | ||
311 | /* Write out the symbols, and then the relocs. We must write out | |
312 | the symbols first so that we know the symbol indices. */ | |
313 | ||
314 | if (bfd_get_symcount (abfd) != 0) | |
315 | { | |
316 | /* Skip the relocs to where we want to put the symbols. */ | |
dc810e39 | 317 | if (bfd_seek (abfd, (file_ptr) (N_DRELOFF (*execp) + execp->a_drsize), |
252b5132 RH |
318 | SEEK_SET) != 0) |
319 | return false; | |
320 | } | |
321 | ||
322 | if (!MY (write_syms) (abfd)) | |
323 | return false; | |
324 | ||
325 | if (bfd_get_symcount (abfd) != 0) | |
326 | { | |
dc810e39 | 327 | if (bfd_seek (abfd, (file_ptr) N_TRELOFF (*execp), SEEK_CUR) != 0) |
252b5132 RH |
328 | return false; |
329 | if (!NAME (aout,squirt_out_relocs) (abfd, obj_textsec (abfd))) | |
330 | return false; | |
dc810e39 | 331 | if (bfd_seek (abfd, (file_ptr) N_DRELOFF (*execp), SEEK_CUR) != 0) |
252b5132 RH |
332 | return false; |
333 | if (!NAME (aout,squirt_out_relocs) (abfd, obj_datasec (abfd))) | |
334 | return false; | |
335 | } | |
336 | ||
337 | return true; | |
338 | } | |
339 | ||
340 | /* convert the hp symbol type to be the same as aout64.h usage so we */ | |
341 | /* can piggyback routines in aoutx.h. */ | |
342 | ||
343 | static void | |
344 | convert_sym_type (sym_pointer, cache_ptr, abfd) | |
5f771d47 | 345 | struct external_nlist *sym_pointer ATTRIBUTE_UNUSED; |
252b5132 | 346 | aout_symbol_type *cache_ptr; |
5f771d47 | 347 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
348 | { |
349 | int name_type; | |
350 | int new_type; | |
351 | ||
352 | name_type = (cache_ptr->type); | |
353 | new_type = 0; | |
354 | ||
355 | if ((name_type & HP_SYMTYPE_ALIGN) != 0) | |
356 | { | |
357 | /* iou_error ("aligned symbol encountered: %s", name);*/ | |
358 | name_type = 0; | |
359 | } | |
360 | ||
361 | if (name_type == HP_SYMTYPE_FILENAME) | |
362 | new_type = N_FN; | |
363 | else | |
364 | { | |
365 | switch (name_type & HP_SYMTYPE_TYPE) | |
366 | { | |
367 | case HP_SYMTYPE_UNDEFINED: | |
368 | new_type = N_UNDF; | |
369 | break; | |
370 | ||
371 | case HP_SYMTYPE_ABSOLUTE: | |
372 | new_type = N_ABS; | |
373 | break; | |
374 | ||
375 | case HP_SYMTYPE_TEXT: | |
376 | new_type = N_TEXT; | |
377 | break; | |
378 | ||
379 | case HP_SYMTYPE_DATA: | |
380 | new_type = N_DATA; | |
381 | break; | |
382 | ||
383 | case HP_SYMTYPE_BSS: | |
384 | new_type = N_BSS; | |
385 | break; | |
386 | ||
387 | case HP_SYMTYPE_COMMON: | |
388 | new_type = N_COMM; | |
389 | break; | |
390 | ||
391 | default: | |
392 | abort (); | |
393 | break; | |
394 | } | |
395 | if (name_type & HP_SYMTYPE_EXTERNAL) | |
396 | new_type |= N_EXT; | |
397 | ||
398 | if (name_type & HP_SECONDARY_SYMBOL) | |
399 | { | |
400 | switch (new_type) | |
401 | { | |
402 | default: | |
403 | abort (); | |
404 | case N_UNDF | N_EXT: | |
405 | /* If the value is nonzero, then just treat this as a | |
406 | common symbol. I don't know if this is correct in | |
407 | all cases, but it is more correct than treating it as | |
408 | a weak undefined symbol. */ | |
409 | if (cache_ptr->symbol.value == 0) | |
410 | new_type = N_WEAKU; | |
411 | break; | |
412 | case N_ABS | N_EXT: | |
413 | new_type = N_WEAKA; | |
414 | break; | |
415 | case N_TEXT | N_EXT: | |
416 | new_type = N_WEAKT; | |
417 | break; | |
418 | case N_DATA | N_EXT: | |
419 | new_type = N_WEAKD; | |
420 | break; | |
421 | case N_BSS | N_EXT: | |
422 | new_type = N_WEAKB; | |
423 | break; | |
424 | } | |
425 | } | |
426 | } | |
427 | cache_ptr->type = new_type; | |
428 | ||
429 | } | |
430 | ||
252b5132 RH |
431 | /* |
432 | DESCRIPTION | |
433 | Swaps the information in an executable header taken from a raw | |
434 | byte stream memory image, into the internal exec_header | |
435 | structure. | |
436 | */ | |
437 | ||
438 | void | |
439 | NAME (aout,swap_exec_header_in) (abfd, raw_bytes, execp) | |
440 | bfd *abfd; | |
441 | struct external_exec *raw_bytes; | |
442 | struct internal_exec *execp; | |
443 | { | |
444 | struct external_exec *bytes = (struct external_exec *) raw_bytes; | |
445 | ||
446 | /* The internal_exec structure has some fields that are unused in this | |
447 | configuration (IE for i960), so ensure that all such uninitialized | |
448 | fields are zero'd out. There are places where two of these structs | |
449 | are memcmp'd, and thus the contents do matter. */ | |
450 | memset (execp, 0, sizeof (struct internal_exec)); | |
451 | /* Now fill in fields in the execp, from the bytes in the raw data. */ | |
dc810e39 | 452 | execp->a_info = H_GET_32 (abfd, bytes->e_info); |
252b5132 RH |
453 | execp->a_text = GET_WORD (abfd, bytes->e_text); |
454 | execp->a_data = GET_WORD (abfd, bytes->e_data); | |
455 | execp->a_bss = GET_WORD (abfd, bytes->e_bss); | |
456 | execp->a_syms = GET_WORD (abfd, bytes->e_syms); | |
457 | execp->a_entry = GET_WORD (abfd, bytes->e_entry); | |
458 | execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); | |
459 | execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); | |
460 | ||
461 | /***************************************************************/ | |
462 | /* check the header to see if it was generated by a bfd output */ | |
463 | /* this is detected rather bizarely by requiring a bunch of */ | |
464 | /* header fields to be zero and an old unused field (now used) */ | |
465 | /* to be set. */ | |
466 | /***************************************************************/ | |
467 | do | |
468 | { | |
469 | long syms; | |
470 | struct aout_data_struct *rawptr; | |
dc810e39 AM |
471 | bfd_size_type amt; |
472 | ||
473 | if (H_GET_32 (abfd, bytes->e_passize) != 0) | |
252b5132 | 474 | break; |
dc810e39 | 475 | if (H_GET_32 (abfd, bytes->e_syms) != 0) |
252b5132 | 476 | break; |
dc810e39 | 477 | if (H_GET_32 (abfd, bytes->e_supsize) != 0) |
252b5132 RH |
478 | break; |
479 | ||
dc810e39 | 480 | syms = H_GET_32 (abfd, bytes->e_drelocs); |
252b5132 RH |
481 | if (syms == 0) |
482 | break; | |
483 | ||
484 | /* OK, we've passed the test as best as we can determine */ | |
485 | execp->a_syms = syms; | |
486 | ||
487 | /* allocate storage for where we will store this result */ | |
dc810e39 AM |
488 | amt = sizeof (*rawptr); |
489 | rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt); | |
252b5132 RH |
490 | |
491 | if (rawptr == NULL) | |
492 | return; | |
493 | abfd->tdata.aout_data = rawptr; | |
494 | obj_aout_subformat (abfd) = gnu_encap_format; | |
495 | } | |
496 | while (0); | |
497 | } | |
498 | ||
252b5132 RH |
499 | /* The hp symbol table is a bit different than other a.out targets. Instead |
500 | of having an array of nlist items and an array of strings, hp's format | |
501 | has them mixed together in one structure. In addition, the strings are | |
502 | not null terminated. It looks something like this: | |
503 | ||
504 | nlist element 1 | |
505 | string1 | |
506 | nlist element 2 | |
507 | string2 | |
508 | ... | |
509 | ||
510 | The whole symbol table is read as one chunk and then we march thru it | |
511 | and convert it to canonical form. As we march thru the table, we copy | |
512 | the nlist data into the internal form and we compact the strings and null | |
513 | terminate them, using storage from the already allocated symbol table: | |
514 | ||
515 | string1 | |
516 | null | |
517 | string2 | |
518 | null | |
519 | ... | |
520 | */ | |
521 | ||
522 | boolean | |
523 | MY (slurp_symbol_table) (abfd) | |
524 | bfd *abfd; | |
525 | { | |
526 | bfd_size_type symbol_bytes; | |
527 | struct external_nlist *syms; | |
528 | struct external_nlist *sym_pointer; | |
529 | struct external_nlist *sym_end; | |
530 | char *strings; | |
531 | aout_symbol_type *cached; | |
532 | unsigned num_syms = 0; | |
dc810e39 | 533 | bfd_size_type amt; |
252b5132 RH |
534 | |
535 | /* If there's no work to be done, don't do any */ | |
536 | if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL) | |
537 | return true; | |
538 | symbol_bytes = exec_hdr (abfd)->a_syms; | |
539 | ||
dc810e39 AM |
540 | amt = symbol_bytes + SYM_EXTRA_BYTES; |
541 | strings = (char *) bfd_alloc (abfd, amt); | |
252b5132 RH |
542 | if (!strings) |
543 | return false; | |
544 | syms = (struct external_nlist *) (strings + SYM_EXTRA_BYTES); | |
545 | if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 | |
dc810e39 | 546 | || bfd_bread ((PTR) syms, symbol_bytes, abfd) != symbol_bytes) |
252b5132 RH |
547 | { |
548 | bfd_release (abfd, syms); | |
549 | return false; | |
550 | } | |
551 | ||
252b5132 RH |
552 | sym_end = (struct external_nlist *) (((char *) syms) + symbol_bytes); |
553 | ||
554 | /* first, march thru the table and figure out how many symbols there are */ | |
555 | for (sym_pointer = syms; sym_pointer < sym_end; sym_pointer++, num_syms++) | |
556 | { | |
557 | /* skip over the embedded symbol. */ | |
558 | sym_pointer = (struct external_nlist *) (((char *) sym_pointer) + | |
559 | sym_pointer->e_length[0]); | |
560 | } | |
561 | ||
562 | /* now that we know the symbol count, update the bfd header */ | |
563 | bfd_get_symcount (abfd) = num_syms; | |
564 | ||
dc810e39 AM |
565 | amt = num_syms; |
566 | amt *= sizeof (aout_symbol_type); | |
567 | cached = (aout_symbol_type *) bfd_zalloc (abfd, amt); | |
568 | if (cached == NULL && num_syms != 0) | |
252b5132 RH |
569 | return false; |
570 | ||
571 | /* as we march thru the hp symbol table, convert it into a list of | |
572 | null terminated strings to hold the symbol names. Make sure any | |
573 | assignment to the strings pointer is done after we're thru using | |
574 | the nlist so we don't overwrite anything important. */ | |
575 | ||
576 | /* OK, now walk the new symtable, cacheing symbol properties */ | |
577 | { | |
578 | aout_symbol_type *cache_ptr = cached; | |
579 | aout_symbol_type cache_save; | |
580 | /* Run through table and copy values */ | |
581 | for (sym_pointer = syms, cache_ptr = cached; | |
582 | sym_pointer < sym_end; sym_pointer++, cache_ptr++) | |
583 | { | |
584 | unsigned int length; | |
585 | cache_ptr->symbol.the_bfd = abfd; | |
586 | cache_ptr->symbol.value = GET_SWORD (abfd, sym_pointer->e_value); | |
587 | cache_ptr->desc = bfd_get_16 (abfd, sym_pointer->e_almod); | |
588 | cache_ptr->type = bfd_get_8 (abfd, sym_pointer->e_type); | |
589 | cache_ptr->symbol.udata.p = NULL; | |
590 | length = bfd_get_8 (abfd, sym_pointer->e_length); | |
591 | cache_ptr->other = length; /* other not used, save length here */ | |
592 | ||
593 | cache_save = *cache_ptr; | |
594 | convert_sym_type (sym_pointer, cache_ptr, abfd); | |
595 | if (!translate_from_native_sym_flags (abfd, cache_ptr)) | |
596 | return false; | |
597 | ||
598 | /********************************************************/ | |
599 | /* for hpux, the 'lenght' value indicates the length of */ | |
600 | /* the symbol name which follows the nlist entry. */ | |
601 | /********************************************************/ | |
602 | if (length) | |
603 | { | |
604 | /**************************************************************/ | |
605 | /* the hp string is not null terminated so we create a new one*/ | |
606 | /* by copying the string to overlap the just vacated nlist */ | |
607 | /* structure before it in memory. */ | |
608 | /**************************************************************/ | |
609 | cache_ptr->symbol.name = strings; | |
610 | memcpy (strings, sym_pointer + 1, length); | |
611 | strings[length] = '\0'; | |
612 | strings += length + 1; | |
613 | } | |
614 | else | |
615 | cache_ptr->symbol.name = (char *) NULL; | |
616 | ||
617 | /* skip over the embedded symbol. */ | |
618 | sym_pointer = (struct external_nlist *) (((char *) sym_pointer) + | |
619 | length); | |
620 | } | |
621 | } | |
622 | ||
623 | obj_aout_symbols (abfd) = cached; | |
624 | ||
625 | return true; | |
626 | } | |
627 | ||
252b5132 RH |
628 | void |
629 | MY (swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount) | |
630 | bfd *abfd; | |
631 | struct hp300hpux_reloc *bytes; | |
632 | arelent *cache_ptr; | |
633 | asymbol **symbols; | |
5f771d47 | 634 | bfd_size_type symcount ATTRIBUTE_UNUSED; |
252b5132 RH |
635 | { |
636 | int r_index; | |
637 | int r_extern = 0; | |
638 | unsigned int r_length; | |
639 | int r_pcrel = 0; | |
640 | struct aoutdata *su = &(abfd->tdata.aout_data->a); | |
641 | ||
dc810e39 AM |
642 | cache_ptr->address = H_GET_32 (abfd, bytes->r_address); |
643 | r_index = H_GET_16 (abfd, bytes->r_index); | |
252b5132 RH |
644 | |
645 | switch (bytes->r_type[0]) | |
646 | { | |
647 | case HP_RSEGMENT_TEXT: | |
648 | r_index = N_TEXT; | |
649 | break; | |
650 | case HP_RSEGMENT_DATA: | |
651 | r_index = N_DATA; | |
652 | break; | |
653 | case HP_RSEGMENT_BSS: | |
654 | r_index = N_BSS; | |
655 | break; | |
656 | case HP_RSEGMENT_EXTERNAL: | |
657 | r_extern = 1; | |
658 | break; | |
659 | case HP_RSEGMENT_PCREL: | |
660 | r_extern = 1; | |
661 | r_pcrel = 1; | |
662 | break; | |
663 | case HP_RSEGMENT_RDLT: | |
664 | break; | |
665 | case HP_RSEGMENT_RPLT: | |
666 | break; | |
667 | case HP_RSEGMENT_NOOP: | |
668 | break; | |
669 | default: | |
670 | abort (); | |
671 | break; | |
672 | } | |
673 | ||
674 | switch (bytes->r_length[0]) | |
675 | { | |
676 | case HP_RLENGTH_BYTE: | |
677 | r_length = 0; | |
678 | break; | |
679 | case HP_RLENGTH_WORD: | |
680 | r_length = 1; | |
681 | break; | |
682 | case HP_RLENGTH_LONG: | |
683 | r_length = 2; | |
684 | break; | |
685 | default: | |
686 | abort (); | |
687 | break; | |
688 | } | |
689 | ||
690 | cache_ptr->howto = howto_table_std + r_length + 4 * r_pcrel; | |
691 | /* FIXME-soon: Roll baserel, jmptable, relative bits into howto setting */ | |
692 | ||
693 | /* This macro uses the r_index value computed above */ | |
694 | if (r_pcrel && r_extern) | |
695 | { | |
696 | /* The GNU linker assumes any offset from beginning of section */ | |
697 | /* is already incorporated into the image while the HP linker */ | |
698 | /* adds this in later. Add it in now... */ | |
699 | MOVE_ADDRESS (-cache_ptr->address); | |
700 | } | |
701 | else | |
702 | { | |
703 | MOVE_ADDRESS (0); | |
704 | } | |
705 | } | |
706 | ||
707 | boolean | |
708 | MY (slurp_reloc_table) (abfd, asect, symbols) | |
709 | bfd *abfd; | |
710 | sec_ptr asect; | |
711 | asymbol **symbols; | |
712 | { | |
dc810e39 | 713 | bfd_size_type count; |
252b5132 RH |
714 | bfd_size_type reloc_size; |
715 | PTR relocs; | |
716 | arelent *reloc_cache; | |
717 | size_t each_size; | |
718 | struct hp300hpux_reloc *rptr; | |
719 | unsigned int counter; | |
720 | arelent *cache_ptr; | |
721 | ||
722 | if (asect->relocation) | |
723 | return true; | |
724 | ||
725 | if (asect->flags & SEC_CONSTRUCTOR) | |
726 | return true; | |
727 | ||
728 | if (asect == obj_datasec (abfd)) | |
729 | { | |
730 | reloc_size = exec_hdr (abfd)->a_drsize; | |
731 | goto doit; | |
732 | } | |
733 | ||
734 | if (asect == obj_textsec (abfd)) | |
735 | { | |
736 | reloc_size = exec_hdr (abfd)->a_trsize; | |
737 | goto doit; | |
738 | } | |
739 | ||
740 | bfd_set_error (bfd_error_invalid_operation); | |
741 | return false; | |
742 | ||
743 | doit: | |
744 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) | |
745 | return false; | |
746 | each_size = obj_reloc_entry_size (abfd); | |
747 | ||
748 | count = reloc_size / each_size; | |
749 | ||
dc810e39 | 750 | reloc_cache = (arelent *) bfd_zalloc (abfd, count * sizeof (arelent)); |
252b5132 RH |
751 | if (!reloc_cache && count != 0) |
752 | return false; | |
753 | ||
754 | relocs = (PTR) bfd_alloc (abfd, reloc_size); | |
755 | if (!relocs && reloc_size != 0) | |
756 | { | |
757 | bfd_release (abfd, reloc_cache); | |
758 | return false; | |
759 | } | |
760 | ||
dc810e39 | 761 | if (bfd_bread (relocs, reloc_size, abfd) != reloc_size) |
252b5132 RH |
762 | { |
763 | bfd_release (abfd, relocs); | |
764 | bfd_release (abfd, reloc_cache); | |
765 | return false; | |
766 | } | |
767 | ||
768 | rptr = (struct hp300hpux_reloc *) relocs; | |
769 | counter = 0; | |
770 | cache_ptr = reloc_cache; | |
771 | ||
772 | for (; counter < count; counter++, rptr++, cache_ptr++) | |
773 | { | |
774 | MY (swap_std_reloc_in) (abfd, rptr, cache_ptr, symbols, | |
dc810e39 | 775 | (bfd_size_type) bfd_get_symcount (abfd)); |
252b5132 RH |
776 | } |
777 | ||
252b5132 RH |
778 | bfd_release (abfd, relocs); |
779 | asect->relocation = reloc_cache; | |
780 | asect->reloc_count = count; | |
781 | return true; | |
782 | } | |
783 | ||
252b5132 RH |
784 | /************************************************************************/ |
785 | /* The following functions are identical to functions in aoutx.h except */ | |
786 | /* they refer to MY(func) rather than NAME(aout,func) and they also */ | |
787 | /* call aout_32 versions if the input file was generated by gcc */ | |
788 | /************************************************************************/ | |
789 | ||
790 | long aout_32_get_symtab PARAMS ((bfd * abfd, asymbol ** location)); | |
791 | long aout_32_get_symtab_upper_bound PARAMS ((bfd * abfd)); | |
792 | ||
793 | long aout_32_canonicalize_reloc PARAMS ((bfd * abfd, sec_ptr section, | |
794 | arelent ** relptr, | |
795 | asymbol ** symbols)); | |
796 | ||
797 | long | |
798 | MY (get_symtab) (abfd, location) | |
799 | bfd *abfd; | |
800 | asymbol **location; | |
801 | { | |
802 | unsigned int counter = 0; | |
803 | aout_symbol_type *symbase; | |
804 | ||
805 | if (obj_aout_subformat (abfd) == gnu_encap_format) | |
806 | return aout_32_get_symtab (abfd, location); | |
807 | ||
808 | if (!MY (slurp_symbol_table) (abfd)) | |
809 | return -1; | |
810 | ||
811 | for (symbase = obj_aout_symbols (abfd); counter++ < bfd_get_symcount (abfd);) | |
812 | *(location++) = (asymbol *) (symbase++); | |
813 | *location++ = 0; | |
814 | return bfd_get_symcount (abfd); | |
815 | } | |
816 | ||
817 | long | |
818 | MY (get_symtab_upper_bound) (abfd) | |
819 | bfd *abfd; | |
820 | { | |
821 | if (obj_aout_subformat (abfd) == gnu_encap_format) | |
822 | return aout_32_get_symtab_upper_bound (abfd); | |
823 | if (!MY (slurp_symbol_table) (abfd)) | |
824 | return -1; | |
825 | ||
826 | return (bfd_get_symcount (abfd) + 1) * (sizeof (aout_symbol_type *)); | |
827 | } | |
828 | ||
252b5132 RH |
829 | long |
830 | MY (canonicalize_reloc) (abfd, section, relptr, symbols) | |
831 | bfd *abfd; | |
832 | sec_ptr section; | |
833 | arelent **relptr; | |
834 | asymbol **symbols; | |
835 | { | |
836 | arelent *tblptr = section->relocation; | |
837 | unsigned int count; | |
838 | if (obj_aout_subformat (abfd) == gnu_encap_format) | |
839 | return aout_32_canonicalize_reloc (abfd, section, relptr, symbols); | |
840 | ||
841 | if (!(tblptr || MY (slurp_reloc_table) (abfd, section, symbols))) | |
842 | return -1; | |
843 | ||
844 | if (section->flags & SEC_CONSTRUCTOR) | |
845 | { | |
846 | arelent_chain *chain = section->constructor_chain; | |
847 | for (count = 0; count < section->reloc_count; count++) | |
848 | { | |
849 | *relptr++ = &chain->relent; | |
850 | chain = chain->next; | |
851 | } | |
852 | } | |
853 | else | |
854 | { | |
855 | tblptr = section->relocation; | |
856 | ||
857 | for (count = 0; count++ < section->reloc_count;) | |
858 | { | |
859 | *relptr++ = tblptr++; | |
860 | } | |
861 | } | |
862 | *relptr = 0; | |
863 | ||
864 | return section->reloc_count; | |
865 | } | |
866 | ||
252b5132 | 867 | #include "aout-target.h" |