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252b5132 | 1 | /* BFD back-end for Intel 960 b.out binaries. |
5f771d47 ILT |
2 | Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999 |
3 | Free Software Foundation, Inc. | |
252b5132 RH |
4 | Written by Cygnus Support. |
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 | ||
23 | #include "bfd.h" | |
24 | #include "sysdep.h" | |
25 | #include "libbfd.h" | |
26 | #include "bfdlink.h" | |
27 | #include "genlink.h" | |
28 | #include "bout.h" | |
29 | ||
30 | #include "aout/stab_gnu.h" | |
31 | #include "libaout.h" /* BFD a.out internal data structures */ | |
32 | ||
33 | ||
34 | static int aligncode PARAMS ((bfd *abfd, asection *input_section, | |
35 | arelent *r, unsigned int shrink)); | |
36 | static void perform_slip PARAMS ((bfd *abfd, unsigned int slip, | |
37 | asection *input_section, bfd_vma value)); | |
38 | static boolean b_out_squirt_out_relocs PARAMS ((bfd *abfd, asection *section)); | |
39 | static const bfd_target *b_out_callback PARAMS ((bfd *)); | |
40 | static bfd_reloc_status_type calljx_callback | |
41 | PARAMS ((bfd *, struct bfd_link_info *, arelent *, PTR src, PTR dst, | |
42 | asection *)); | |
43 | static bfd_reloc_status_type callj_callback | |
44 | PARAMS ((bfd *, struct bfd_link_info *, arelent *, PTR data, | |
45 | unsigned int srcidx, unsigned int dstidx, asection *, boolean)); | |
46 | static bfd_vma get_value PARAMS ((arelent *, struct bfd_link_info *, | |
47 | asection *)); | |
48 | static int abs32code PARAMS ((bfd *, asection *, arelent *, | |
49 | unsigned int, struct bfd_link_info *)); | |
50 | static boolean b_out_bfd_relax_section PARAMS ((bfd *, asection *, | |
51 | struct bfd_link_info *, | |
52 | boolean *)); | |
53 | static bfd_byte *b_out_bfd_get_relocated_section_contents | |
54 | PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, | |
55 | bfd_byte *, boolean, asymbol **)); | |
56 | ||
57 | /* Swaps the information in an executable header taken from a raw byte | |
58 | stream memory image, into the internal exec_header structure. */ | |
59 | ||
60 | void | |
61 | bout_swap_exec_header_in (abfd, raw_bytes, execp) | |
62 | bfd *abfd; | |
63 | struct external_exec *raw_bytes; | |
64 | struct internal_exec *execp; | |
65 | { | |
66 | struct external_exec *bytes = (struct external_exec *)raw_bytes; | |
67 | ||
68 | /* Now fill in fields in the execp, from the bytes in the raw data. */ | |
69 | execp->a_info = bfd_h_get_32 (abfd, bytes->e_info); | |
70 | execp->a_text = GET_WORD (abfd, bytes->e_text); | |
71 | execp->a_data = GET_WORD (abfd, bytes->e_data); | |
72 | execp->a_bss = GET_WORD (abfd, bytes->e_bss); | |
73 | execp->a_syms = GET_WORD (abfd, bytes->e_syms); | |
74 | execp->a_entry = GET_WORD (abfd, bytes->e_entry); | |
75 | execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); | |
76 | execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); | |
77 | execp->a_tload = GET_WORD (abfd, bytes->e_tload); | |
78 | execp->a_dload = GET_WORD (abfd, bytes->e_dload); | |
79 | execp->a_talign = bytes->e_talign[0]; | |
80 | execp->a_dalign = bytes->e_dalign[0]; | |
81 | execp->a_balign = bytes->e_balign[0]; | |
82 | execp->a_relaxable = bytes->e_relaxable[0]; | |
83 | } | |
84 | ||
85 | /* Swaps the information in an internal exec header structure into the | |
86 | supplied buffer ready for writing to disk. */ | |
87 | ||
88 | PROTO(void, bout_swap_exec_header_out, | |
89 | (bfd *abfd, | |
90 | struct internal_exec *execp, | |
91 | struct external_exec *raw_bytes)); | |
92 | void | |
93 | bout_swap_exec_header_out (abfd, execp, raw_bytes) | |
94 | bfd *abfd; | |
95 | struct internal_exec *execp; | |
96 | struct external_exec *raw_bytes; | |
97 | { | |
98 | struct external_exec *bytes = (struct external_exec *)raw_bytes; | |
99 | ||
100 | /* Now fill in fields in the raw data, from the fields in the exec struct. */ | |
101 | bfd_h_put_32 (abfd, execp->a_info , bytes->e_info); | |
102 | PUT_WORD (abfd, execp->a_text , bytes->e_text); | |
103 | PUT_WORD (abfd, execp->a_data , bytes->e_data); | |
104 | PUT_WORD (abfd, execp->a_bss , bytes->e_bss); | |
105 | PUT_WORD (abfd, execp->a_syms , bytes->e_syms); | |
106 | PUT_WORD (abfd, execp->a_entry , bytes->e_entry); | |
107 | PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); | |
108 | PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); | |
109 | PUT_WORD (abfd, execp->a_tload , bytes->e_tload); | |
110 | PUT_WORD (abfd, execp->a_dload , bytes->e_dload); | |
111 | bytes->e_talign[0] = execp->a_talign; | |
112 | bytes->e_dalign[0] = execp->a_dalign; | |
113 | bytes->e_balign[0] = execp->a_balign; | |
114 | bytes->e_relaxable[0] = execp->a_relaxable; | |
115 | } | |
116 | ||
117 | ||
118 | static const bfd_target * | |
119 | b_out_object_p (abfd) | |
120 | bfd *abfd; | |
121 | { | |
122 | struct internal_exec anexec; | |
123 | struct external_exec exec_bytes; | |
124 | ||
125 | if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd) | |
126 | != EXEC_BYTES_SIZE) { | |
127 | if (bfd_get_error () != bfd_error_system_call) | |
128 | bfd_set_error (bfd_error_wrong_format); | |
129 | return 0; | |
130 | } | |
131 | ||
132 | anexec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info); | |
133 | ||
134 | if (N_BADMAG (anexec)) { | |
135 | bfd_set_error (bfd_error_wrong_format); | |
136 | return 0; | |
137 | } | |
138 | ||
139 | bout_swap_exec_header_in (abfd, &exec_bytes, &anexec); | |
140 | return aout_32_some_aout_object_p (abfd, &anexec, b_out_callback); | |
141 | } | |
142 | ||
143 | ||
144 | /* Finish up the opening of a b.out file for reading. Fill in all the | |
145 | fields that are not handled by common code. */ | |
146 | ||
147 | static const bfd_target * | |
148 | b_out_callback (abfd) | |
149 | bfd *abfd; | |
150 | { | |
151 | struct internal_exec *execp = exec_hdr (abfd); | |
152 | unsigned long bss_start; | |
153 | ||
154 | /* Architecture and machine type */ | |
155 | bfd_set_arch_mach(abfd, | |
156 | bfd_arch_i960, /* B.out only used on i960 */ | |
157 | bfd_mach_i960_core /* Default */ | |
158 | ); | |
159 | ||
160 | /* The positions of the string table and symbol table. */ | |
161 | obj_str_filepos (abfd) = N_STROFF (*execp); | |
162 | obj_sym_filepos (abfd) = N_SYMOFF (*execp); | |
163 | ||
164 | /* The alignments of the sections */ | |
165 | obj_textsec (abfd)->alignment_power = execp->a_talign; | |
166 | obj_datasec (abfd)->alignment_power = execp->a_dalign; | |
167 | obj_bsssec (abfd)->alignment_power = execp->a_balign; | |
168 | ||
169 | /* The starting addresses of the sections. */ | |
170 | obj_textsec (abfd)->vma = execp->a_tload; | |
171 | obj_datasec (abfd)->vma = execp->a_dload; | |
172 | ||
173 | obj_textsec (abfd)->lma = obj_textsec (abfd)->vma; | |
174 | obj_datasec (abfd)->lma = obj_datasec (abfd)->vma; | |
175 | ||
176 | /* And reload the sizes, since the aout module zaps them */ | |
177 | obj_textsec (abfd)->_raw_size = execp->a_text; | |
178 | ||
179 | bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section */ | |
180 | obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign); | |
181 | ||
182 | obj_bsssec (abfd)->lma = obj_bsssec (abfd)->vma; | |
183 | ||
184 | /* The file positions of the sections */ | |
185 | obj_textsec (abfd)->filepos = N_TXTOFF(*execp); | |
186 | obj_datasec (abfd)->filepos = N_DATOFF(*execp); | |
187 | ||
188 | /* The file positions of the relocation info */ | |
189 | obj_textsec (abfd)->rel_filepos = N_TROFF(*execp); | |
190 | obj_datasec (abfd)->rel_filepos = N_DROFF(*execp); | |
191 | ||
192 | adata(abfd).page_size = 1; /* Not applicable. */ | |
193 | adata(abfd).segment_size = 1; /* Not applicable. */ | |
194 | adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE; | |
195 | ||
196 | if (execp->a_relaxable) | |
197 | abfd->flags |= BFD_IS_RELAXABLE; | |
198 | return abfd->xvec; | |
199 | } | |
200 | ||
201 | struct bout_data_struct { | |
202 | struct aoutdata a; | |
203 | struct internal_exec e; | |
204 | }; | |
205 | ||
206 | static boolean | |
207 | b_out_mkobject (abfd) | |
208 | bfd *abfd; | |
209 | { | |
210 | struct bout_data_struct *rawptr; | |
211 | ||
212 | rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, sizeof (struct bout_data_struct)); | |
213 | if (rawptr == NULL) | |
214 | return false; | |
215 | ||
216 | abfd->tdata.bout_data = rawptr; | |
217 | exec_hdr (abfd) = &rawptr->e; | |
218 | ||
219 | obj_textsec (abfd) = (asection *)NULL; | |
220 | obj_datasec (abfd) = (asection *)NULL; | |
221 | obj_bsssec (abfd) = (asection *)NULL; | |
222 | ||
223 | return true; | |
224 | } | |
225 | ||
226 | static int | |
227 | b_out_symbol_cmp (a, b) | |
228 | struct aout_symbol **a, **b; | |
229 | { | |
230 | asection *sec; | |
231 | bfd_vma av, bv; | |
232 | ||
233 | /* Primary key is address */ | |
234 | sec = bfd_get_section (&(*a)->symbol); | |
235 | av = sec->output_section->vma + sec->output_offset + (*a)->symbol.value; | |
236 | sec = bfd_get_section (&(*b)->symbol); | |
237 | bv = sec->output_section->vma + sec->output_offset + (*b)->symbol.value; | |
238 | ||
239 | if (av < bv) | |
240 | return -1; | |
241 | if (av > bv) | |
242 | return 1; | |
243 | ||
244 | /* Secondary key puts CALLNAME syms last and BALNAME syms first, so | |
245 | that they have the best chance of being contiguous. */ | |
246 | if (IS_BALNAME ((*a)->other) || IS_CALLNAME ((*b)->other)) | |
247 | return -1; | |
248 | if (IS_CALLNAME ((*a)->other) || IS_BALNAME ((*b)->other)) | |
249 | return 1; | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | static boolean | |
255 | b_out_write_object_contents (abfd) | |
256 | bfd *abfd; | |
257 | { | |
258 | struct external_exec swapped_hdr; | |
259 | ||
260 | if (! aout_32_make_sections (abfd)) | |
261 | return false; | |
262 | ||
263 | exec_hdr (abfd)->a_info = BMAGIC; | |
264 | ||
265 | exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size; | |
266 | exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size; | |
267 | exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size; | |
268 | exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist); | |
269 | exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); | |
270 | exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) * | |
271 | sizeof (struct relocation_info)); | |
272 | exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) * | |
273 | sizeof (struct relocation_info)); | |
274 | ||
275 | exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power; | |
276 | exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power; | |
277 | exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power; | |
278 | ||
279 | exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma; | |
280 | exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma; | |
281 | ||
282 | bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr); | |
283 | ||
284 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 | |
285 | || (bfd_write ((PTR) &swapped_hdr, 1, EXEC_BYTES_SIZE, abfd) | |
286 | != EXEC_BYTES_SIZE)) | |
287 | return false; | |
288 | ||
289 | /* Now write out reloc info, followed by syms and strings */ | |
290 | if (bfd_get_symcount (abfd) != 0) | |
291 | { | |
292 | /* Make sure {CALL,BAL}NAME symbols remain adjacent on output | |
293 | by sorting. This is complicated by the fact that stabs are | |
294 | also ordered. Solve this by shifting all stabs to the end | |
295 | in order, then sorting the rest. */ | |
296 | ||
297 | asymbol **outsyms, **p, **q; | |
298 | ||
299 | outsyms = bfd_get_outsymbols (abfd); | |
300 | p = outsyms + bfd_get_symcount (abfd); | |
301 | ||
302 | for (q = p--; p >= outsyms; p--) | |
303 | { | |
304 | if ((*p)->flags & BSF_DEBUGGING) | |
305 | { | |
306 | asymbol *t = *--q; | |
307 | *q = *p; | |
308 | *p = t; | |
309 | } | |
310 | } | |
311 | ||
312 | if (q > outsyms) | |
313 | qsort (outsyms, q - outsyms, sizeof(asymbol*), b_out_symbol_cmp); | |
314 | ||
315 | /* Back to your regularly scheduled program. */ | |
316 | ||
317 | if (bfd_seek (abfd, (file_ptr)(N_SYMOFF(*exec_hdr(abfd))), SEEK_SET) | |
318 | != 0) | |
319 | return false; | |
320 | ||
321 | if (! aout_32_write_syms (abfd)) | |
322 | return false; | |
323 | ||
324 | if (bfd_seek (abfd, (file_ptr)(N_TROFF(*exec_hdr(abfd))), SEEK_SET) != 0) | |
325 | return false; | |
326 | ||
327 | if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) return false; | |
328 | if (bfd_seek (abfd, (file_ptr)(N_DROFF(*exec_hdr(abfd))), SEEK_SET) | |
329 | != 0) | |
330 | return false; | |
331 | ||
332 | if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) return false; | |
333 | } | |
334 | return true; | |
335 | } | |
336 | \f | |
337 | /** Some reloc hackery */ | |
338 | ||
339 | #define CALLS 0x66003800 /* Template for 'calls' instruction */ | |
340 | #define BAL 0x0b000000 /* Template for 'bal' instruction */ | |
341 | #define BAL_MASK 0x00ffffff | |
342 | #define BALX 0x85f00000 /* Template for 'balx' instruction */ | |
343 | #define BALX_MASK 0x0007ffff | |
344 | #define CALL 0x09000000 | |
345 | #define PCREL13_MASK 0x1fff | |
346 | ||
347 | ||
348 | #define output_addr(sec) ((sec)->output_offset+(sec)->output_section->vma) | |
349 | ||
350 | /* Magic to turn callx into calljx */ | |
351 | static bfd_reloc_status_type | |
352 | calljx_callback (abfd, link_info, reloc_entry, src, dst, input_section) | |
353 | bfd *abfd; | |
354 | struct bfd_link_info *link_info; | |
355 | arelent *reloc_entry; | |
356 | PTR src; | |
357 | PTR dst; | |
358 | asection *input_section; | |
359 | { | |
360 | int word = bfd_get_32 (abfd, src); | |
361 | asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr); | |
362 | aout_symbol_type *symbol = aout_symbol (symbol_in); | |
363 | bfd_vma value; | |
364 | ||
365 | value = get_value (reloc_entry, link_info, input_section); | |
366 | ||
367 | if (IS_CALLNAME (symbol->other)) | |
368 | { | |
369 | aout_symbol_type *balsym = symbol+1; | |
370 | int inst = bfd_get_32 (abfd, (bfd_byte *) src-4); | |
371 | /* The next symbol should be an N_BALNAME */ | |
372 | BFD_ASSERT (IS_BALNAME (balsym->other)); | |
373 | inst &= BALX_MASK; | |
374 | inst |= BALX; | |
375 | bfd_put_32 (abfd, inst, (bfd_byte *) dst-4); | |
376 | symbol = balsym; | |
377 | value = (symbol->symbol.value | |
378 | + output_addr (symbol->symbol.section)); | |
379 | } | |
380 | ||
381 | word += value + reloc_entry->addend; | |
382 | ||
383 | bfd_put_32(abfd, word, dst); | |
384 | return bfd_reloc_ok; | |
385 | } | |
386 | ||
387 | ||
388 | /* Magic to turn call into callj */ | |
389 | static bfd_reloc_status_type | |
390 | callj_callback (abfd, link_info, reloc_entry, data, srcidx, dstidx, | |
391 | input_section, shrinking) | |
392 | bfd *abfd; | |
393 | struct bfd_link_info *link_info; | |
394 | arelent *reloc_entry; | |
395 | PTR data; | |
396 | unsigned int srcidx; | |
397 | unsigned int dstidx; | |
398 | asection *input_section; | |
399 | boolean shrinking; | |
400 | { | |
401 | int word = bfd_get_32 (abfd, (bfd_byte *) data + srcidx); | |
402 | asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr); | |
403 | aout_symbol_type *symbol = aout_symbol (symbol_in); | |
404 | bfd_vma value; | |
405 | ||
406 | value = get_value (reloc_entry, link_info, input_section); | |
407 | ||
408 | if (IS_OTHER(symbol->other)) | |
409 | { | |
410 | /* Call to a system procedure - replace code with system | |
411 | procedure number. */ | |
412 | word = CALLS | (symbol->other - 1); | |
413 | } | |
414 | else if (IS_CALLNAME(symbol->other)) | |
415 | { | |
416 | aout_symbol_type *balsym = symbol+1; | |
417 | ||
418 | /* The next symbol should be an N_BALNAME. */ | |
419 | BFD_ASSERT(IS_BALNAME(balsym->other)); | |
420 | ||
421 | /* We are calling a leaf, so replace the call instruction with a | |
422 | bal. */ | |
423 | word = BAL | ((word | |
424 | + output_addr (balsym->symbol.section) | |
425 | + balsym->symbol.value + reloc_entry->addend | |
426 | - dstidx | |
427 | - output_addr (input_section)) | |
428 | & BAL_MASK); | |
429 | } | |
430 | else if ((symbol->symbol.flags & BSF_SECTION_SYM) != 0) | |
431 | { | |
432 | /* A callj against a symbol in the same section is a fully | |
433 | resolved relative call. We don't need to do anything here. | |
434 | If the symbol is not in the same section, I'm not sure what | |
435 | to do; fortunately, this case will probably never arise. */ | |
436 | BFD_ASSERT (! shrinking); | |
437 | BFD_ASSERT (symbol->symbol.section == input_section); | |
438 | } | |
439 | else | |
440 | { | |
441 | word = CALL | (((word & BAL_MASK) | |
442 | + value | |
443 | + reloc_entry->addend | |
444 | - (shrinking ? dstidx : 0) | |
445 | - output_addr (input_section)) | |
446 | & BAL_MASK); | |
447 | } | |
448 | bfd_put_32(abfd, word, (bfd_byte *) data + dstidx); | |
449 | return bfd_reloc_ok; | |
450 | } | |
451 | ||
452 | /* type rshift size bitsize pcrel bitpos absolute overflow check*/ | |
453 | ||
454 | #define ABS32CODE 0 | |
455 | #define ABS32CODE_SHRUNK 1 | |
456 | #define PCREL24 2 | |
457 | #define CALLJ 3 | |
458 | #define ABS32 4 | |
459 | #define PCREL13 5 | |
460 | #define ABS32_MAYBE_RELAXABLE 1 | |
461 | #define ABS32_WAS_RELAXABLE 2 | |
462 | ||
463 | #define ALIGNER 10 | |
464 | #define ALIGNDONE 11 | |
465 | static reloc_howto_type howto_reloc_callj = | |
466 | HOWTO(CALLJ, 0, 2, 24, true, 0, complain_overflow_signed, 0,"callj", true, 0x00ffffff, 0x00ffffff,false); | |
467 | static reloc_howto_type howto_reloc_abs32 = | |
468 | HOWTO(ABS32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"abs32", true, 0xffffffff,0xffffffff,false); | |
469 | static reloc_howto_type howto_reloc_pcrel24 = | |
470 | HOWTO(PCREL24, 0, 2, 24, true, 0, complain_overflow_signed,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false); | |
471 | ||
472 | static reloc_howto_type howto_reloc_pcrel13 = | |
473 | HOWTO(PCREL13, 0, 2, 13, true, 0, complain_overflow_signed,0,"pcrel13", true, 0x00001fff,0x00001fff,false); | |
474 | ||
475 | ||
476 | static reloc_howto_type howto_reloc_abs32codeshrunk = | |
477 | HOWTO(ABS32CODE_SHRUNK, 0, 2, 24, true, 0, complain_overflow_signed, 0,"callx->callj", true, 0x00ffffff, 0x00ffffff,false); | |
478 | ||
479 | static reloc_howto_type howto_reloc_abs32code = | |
480 | HOWTO(ABS32CODE, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"callx", true, 0xffffffff,0xffffffff,false); | |
481 | ||
482 | static reloc_howto_type howto_align_table[] = { | |
483 | HOWTO (ALIGNER, 0, 0x1, 0, false, 0, complain_overflow_dont, 0, "align16", false, 0, 0, false), | |
484 | HOWTO (ALIGNER, 0, 0x3, 0, false, 0, complain_overflow_dont, 0, "align32", false, 0, 0, false), | |
485 | HOWTO (ALIGNER, 0, 0x7, 0, false, 0, complain_overflow_dont, 0, "align64", false, 0, 0, false), | |
486 | HOWTO (ALIGNER, 0, 0xf, 0, false, 0, complain_overflow_dont, 0, "align128", false, 0, 0, false), | |
487 | }; | |
488 | ||
489 | static reloc_howto_type howto_done_align_table[] = { | |
490 | HOWTO (ALIGNDONE, 0x1, 0x1, 0, false, 0, complain_overflow_dont, 0, "donealign16", false, 0, 0, false), | |
491 | HOWTO (ALIGNDONE, 0x3, 0x3, 0, false, 0, complain_overflow_dont, 0, "donealign32", false, 0, 0, false), | |
492 | HOWTO (ALIGNDONE, 0x7, 0x7, 0, false, 0, complain_overflow_dont, 0, "donealign64", false, 0, 0, false), | |
493 | HOWTO (ALIGNDONE, 0xf, 0xf, 0, false, 0, complain_overflow_dont, 0, "donealign128", false, 0, 0, false), | |
494 | }; | |
495 | ||
496 | static reloc_howto_type * | |
497 | b_out_bfd_reloc_type_lookup (abfd, code) | |
5f771d47 | 498 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
499 | bfd_reloc_code_real_type code; |
500 | { | |
501 | switch (code) | |
502 | { | |
503 | default: | |
504 | return 0; | |
505 | case BFD_RELOC_I960_CALLJ: | |
506 | return &howto_reloc_callj; | |
507 | case BFD_RELOC_32: | |
508 | case BFD_RELOC_CTOR: | |
509 | return &howto_reloc_abs32; | |
510 | case BFD_RELOC_24_PCREL: | |
511 | return &howto_reloc_pcrel24; | |
512 | } | |
513 | } | |
514 | ||
515 | /* Allocate enough room for all the reloc entries, plus pointers to them all */ | |
516 | ||
517 | static boolean | |
518 | b_out_slurp_reloc_table (abfd, asect, symbols) | |
519 | bfd *abfd; | |
520 | sec_ptr asect; | |
521 | asymbol **symbols; | |
522 | { | |
523 | register struct relocation_info *rptr; | |
524 | unsigned int counter ; | |
525 | arelent *cache_ptr ; | |
526 | int extern_mask, pcrel_mask, callj_mask, length_shift; | |
527 | int incode_mask; | |
528 | int size_mask; | |
529 | bfd_vma prev_addr = 0; | |
530 | unsigned int count; | |
531 | size_t reloc_size; | |
532 | struct relocation_info *relocs; | |
533 | arelent *reloc_cache; | |
534 | ||
535 | if (asect->relocation) | |
536 | return true; | |
537 | if (!aout_32_slurp_symbol_table (abfd)) | |
538 | return false; | |
539 | ||
540 | if (asect == obj_datasec (abfd)) { | |
541 | reloc_size = exec_hdr(abfd)->a_drsize; | |
542 | goto doit; | |
543 | } | |
544 | ||
545 | if (asect == obj_textsec (abfd)) { | |
546 | reloc_size = exec_hdr(abfd)->a_trsize; | |
547 | goto doit; | |
548 | } | |
549 | ||
550 | if (asect == obj_bsssec (abfd)) { | |
551 | reloc_size = 0; | |
552 | goto doit; | |
553 | } | |
554 | ||
555 | bfd_set_error (bfd_error_invalid_operation); | |
556 | return false; | |
557 | ||
558 | doit: | |
559 | if (bfd_seek (abfd, (file_ptr)(asect->rel_filepos), SEEK_SET) != 0) | |
560 | return false; | |
561 | count = reloc_size / sizeof (struct relocation_info); | |
562 | ||
563 | relocs = (struct relocation_info *) bfd_malloc (reloc_size); | |
564 | if (!relocs && reloc_size != 0) | |
565 | return false; | |
566 | reloc_cache = (arelent *) bfd_malloc ((count+1) * sizeof (arelent)); | |
567 | if (!reloc_cache) { | |
568 | if (relocs != NULL) | |
569 | free ((char*)relocs); | |
570 | return false; | |
571 | } | |
572 | ||
573 | if (bfd_read ((PTR) relocs, 1, reloc_size, abfd) != reloc_size) { | |
574 | free (reloc_cache); | |
575 | if (relocs != NULL) | |
576 | free (relocs); | |
577 | return false; | |
578 | } | |
579 | ||
580 | ||
581 | ||
582 | if (bfd_header_big_endian (abfd)) { | |
583 | /* big-endian bit field allocation order */ | |
584 | pcrel_mask = 0x80; | |
585 | extern_mask = 0x10; | |
586 | incode_mask = 0x08; | |
587 | callj_mask = 0x02; | |
588 | size_mask = 0x20; | |
589 | length_shift = 5; | |
590 | } else { | |
591 | /* little-endian bit field allocation order */ | |
592 | pcrel_mask = 0x01; | |
593 | extern_mask = 0x08; | |
594 | incode_mask = 0x10; | |
595 | callj_mask = 0x40; | |
596 | size_mask = 0x02; | |
597 | length_shift = 1; | |
598 | } | |
599 | ||
600 | for (rptr = relocs, cache_ptr = reloc_cache, counter = 0; | |
601 | counter < count; | |
602 | counter++, rptr++, cache_ptr++) | |
603 | { | |
604 | unsigned char *raw = (unsigned char *)rptr; | |
605 | unsigned int symnum; | |
606 | cache_ptr->address = bfd_h_get_32 (abfd, raw + 0); | |
607 | cache_ptr->howto = 0; | |
608 | if (bfd_header_big_endian (abfd)) | |
609 | { | |
610 | symnum = (raw[4] << 16) | (raw[5] << 8) | raw[6]; | |
611 | } | |
612 | else | |
613 | { | |
614 | symnum = (raw[6] << 16) | (raw[5] << 8) | raw[4]; | |
615 | } | |
616 | ||
617 | if (raw[7] & extern_mask) | |
618 | { | |
619 | /* if this is set then the r_index is a index into the symbol table; | |
620 | * if the bit is not set then r_index contains a section map. | |
621 | * we either fill in the sym entry with a pointer to the symbol, | |
622 | * or point to the correct section | |
623 | */ | |
624 | cache_ptr->sym_ptr_ptr = symbols + symnum; | |
625 | cache_ptr->addend = 0; | |
626 | } else | |
627 | { | |
628 | /* in a.out symbols are relative to the beginning of the | |
629 | * file rather than sections ? | |
630 | * (look in translate_from_native_sym_flags) | |
631 | * the reloc entry addend has added to it the offset into the | |
632 | * file of the data, so subtract the base to make the reloc | |
633 | * section relative */ | |
634 | int s; | |
635 | { | |
636 | /* sign-extend symnum from 24 bits to whatever host uses */ | |
637 | s = symnum; | |
638 | if (s & (1 << 23)) | |
639 | s |= (~0) << 24; | |
640 | } | |
641 | cache_ptr->sym_ptr_ptr = (asymbol **)NULL; | |
642 | switch (s) | |
643 | { | |
644 | case N_TEXT: | |
645 | case N_TEXT | N_EXT: | |
646 | cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; | |
647 | cache_ptr->addend = - obj_textsec(abfd)->vma; | |
648 | break; | |
649 | case N_DATA: | |
650 | case N_DATA | N_EXT: | |
651 | cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; | |
652 | cache_ptr->addend = - obj_datasec(abfd)->vma; | |
653 | break; | |
654 | case N_BSS: | |
655 | case N_BSS | N_EXT: | |
656 | cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; | |
657 | cache_ptr->addend = - obj_bsssec(abfd)->vma; | |
658 | break; | |
659 | case N_ABS: | |
660 | case N_ABS | N_EXT: | |
661 | cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; | |
662 | cache_ptr->addend = 0; | |
663 | break; | |
664 | case -2: /* .align */ | |
665 | if (raw[7] & pcrel_mask) | |
666 | { | |
667 | cache_ptr->howto = &howto_align_table[(raw[7] >> length_shift) & 3]; | |
668 | cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
669 | } | |
670 | else | |
671 | { | |
672 | /* .org? */ | |
673 | abort (); | |
674 | } | |
675 | cache_ptr->addend = 0; | |
676 | break; | |
677 | default: | |
678 | BFD_ASSERT(0); | |
679 | break; | |
680 | } | |
681 | ||
682 | } | |
683 | ||
684 | /* the i960 only has a few relocation types: | |
685 | abs 32-bit and pcrel 24bit. except for callj's! */ | |
686 | if (cache_ptr->howto != 0) | |
687 | ; | |
688 | else if (raw[7] & callj_mask) | |
689 | { | |
690 | cache_ptr->howto = &howto_reloc_callj; | |
691 | } | |
692 | else if ( raw[7] & pcrel_mask) | |
693 | { | |
694 | if (raw[7] & size_mask) | |
695 | cache_ptr->howto = &howto_reloc_pcrel13; | |
696 | else | |
697 | cache_ptr->howto = &howto_reloc_pcrel24; | |
698 | } | |
699 | else | |
700 | { | |
701 | if (raw[7] & incode_mask) | |
702 | { | |
703 | cache_ptr->howto = &howto_reloc_abs32code; | |
704 | } | |
705 | else | |
706 | { | |
707 | cache_ptr->howto = &howto_reloc_abs32; | |
708 | } | |
709 | } | |
710 | if (cache_ptr->address < prev_addr) | |
711 | { | |
712 | /* Ouch! this reloc is out of order, insert into the right place | |
713 | */ | |
714 | arelent tmp; | |
715 | arelent *cursor = cache_ptr-1; | |
716 | bfd_vma stop = cache_ptr->address; | |
717 | tmp = *cache_ptr; | |
718 | while (cursor->address > stop && cursor >= reloc_cache) | |
719 | { | |
720 | cursor[1] = cursor[0]; | |
721 | cursor--; | |
722 | } | |
723 | cursor[1] = tmp; | |
724 | } | |
725 | else | |
726 | { | |
727 | prev_addr = cache_ptr->address; | |
728 | } | |
729 | } | |
730 | ||
731 | ||
732 | if (relocs != NULL) | |
733 | free (relocs); | |
734 | asect->relocation = reloc_cache; | |
735 | asect->reloc_count = count; | |
736 | ||
737 | ||
738 | return true; | |
739 | } | |
740 | ||
741 | ||
742 | static boolean | |
743 | b_out_squirt_out_relocs (abfd, section) | |
744 | bfd *abfd; | |
745 | asection *section; | |
746 | { | |
747 | arelent **generic; | |
748 | int r_extern = 0; | |
749 | int r_idx; | |
750 | int incode_mask; | |
751 | int len_1; | |
752 | unsigned int count = section->reloc_count; | |
753 | struct relocation_info *native, *natptr; | |
754 | size_t natsize = count * sizeof (struct relocation_info); | |
755 | int extern_mask, pcrel_mask, len_2, callj_mask; | |
756 | if (count == 0) return true; | |
757 | generic = section->orelocation; | |
758 | native = ((struct relocation_info *) bfd_malloc (natsize)); | |
759 | if (!native && natsize != 0) | |
760 | return false; | |
761 | ||
762 | if (bfd_header_big_endian (abfd)) | |
763 | { | |
764 | /* Big-endian bit field allocation order */ | |
765 | pcrel_mask = 0x80; | |
766 | extern_mask = 0x10; | |
767 | len_2 = 0x40; | |
768 | len_1 = 0x20; | |
769 | callj_mask = 0x02; | |
770 | incode_mask = 0x08; | |
771 | } | |
772 | else | |
773 | { | |
774 | /* Little-endian bit field allocation order */ | |
775 | pcrel_mask = 0x01; | |
776 | extern_mask = 0x08; | |
777 | len_2 = 0x04; | |
778 | len_1 = 0x02; | |
779 | callj_mask = 0x40; | |
780 | incode_mask = 0x10; | |
781 | } | |
782 | ||
783 | for (natptr = native; count > 0; --count, ++natptr, ++generic) | |
784 | { | |
785 | arelent *g = *generic; | |
786 | unsigned char *raw = (unsigned char *)natptr; | |
787 | asymbol *sym = *(g->sym_ptr_ptr); | |
788 | ||
789 | asection *output_section = sym->section->output_section; | |
790 | ||
791 | bfd_h_put_32(abfd, g->address, raw); | |
792 | /* Find a type in the output format which matches the input howto - | |
793 | * at the moment we assume input format == output format FIXME!! | |
794 | */ | |
795 | r_idx = 0; | |
796 | /* FIXME: Need callj stuff here, and to check the howto entries to | |
797 | be sure they are real for this architecture. */ | |
798 | if (g->howto== &howto_reloc_callj) | |
799 | { | |
800 | raw[7] = callj_mask + pcrel_mask + len_2; | |
801 | } | |
802 | else if (g->howto == &howto_reloc_pcrel24) | |
803 | { | |
804 | raw[7] = pcrel_mask + len_2; | |
805 | } | |
806 | else if (g->howto == &howto_reloc_pcrel13) | |
807 | { | |
808 | raw[7] = pcrel_mask + len_1; | |
809 | } | |
810 | else if (g->howto == &howto_reloc_abs32code) | |
811 | { | |
812 | raw[7] = len_2 + incode_mask; | |
813 | } | |
814 | else if (g->howto >= howto_align_table | |
815 | && g->howto <= (howto_align_table | |
816 | + sizeof (howto_align_table) / sizeof (howto_align_table[0]) | |
817 | - 1)) | |
818 | { | |
819 | /* symnum == -2; extern_mask not set, pcrel_mask set */ | |
820 | r_idx = -2; | |
821 | r_extern = 0; | |
822 | raw[7] = (pcrel_mask | |
823 | | ((g->howto - howto_align_table) << 1)); | |
824 | } | |
825 | else { | |
826 | raw[7] = len_2; | |
827 | } | |
828 | ||
829 | if (r_idx != 0) | |
830 | /* already mucked with r_extern, r_idx */; | |
831 | else if (bfd_is_com_section (output_section) | |
832 | || bfd_is_abs_section (output_section) | |
833 | || bfd_is_und_section (output_section)) | |
834 | { | |
835 | ||
836 | if (bfd_abs_section_ptr->symbol == sym) | |
837 | { | |
838 | /* Whoops, looked like an abs symbol, but is really an offset | |
839 | from the abs section */ | |
840 | r_idx = 0; | |
841 | r_extern = 0; | |
842 | } | |
843 | else | |
844 | { | |
845 | /* Fill in symbol */ | |
846 | ||
847 | r_extern = 1; | |
848 | r_idx = (*g->sym_ptr_ptr)->udata.i; | |
849 | } | |
850 | } | |
851 | else | |
852 | { | |
853 | /* Just an ordinary section */ | |
854 | r_extern = 0; | |
855 | r_idx = output_section->target_index; | |
856 | } | |
857 | ||
858 | if (bfd_header_big_endian (abfd)) { | |
859 | raw[4] = (unsigned char) (r_idx >> 16); | |
860 | raw[5] = (unsigned char) (r_idx >> 8); | |
861 | raw[6] = (unsigned char) (r_idx ); | |
862 | } else { | |
863 | raw[6] = (unsigned char) (r_idx >> 16); | |
864 | raw[5] = (unsigned char) (r_idx>> 8); | |
865 | raw[4] = (unsigned char) (r_idx ); | |
866 | } | |
867 | if (r_extern) | |
868 | raw[7] |= extern_mask; | |
869 | } | |
870 | ||
871 | if (bfd_write ((PTR) native, 1, natsize, abfd) != natsize) { | |
872 | free((PTR)native); | |
873 | return false; | |
874 | } | |
875 | free ((PTR)native); | |
876 | ||
877 | return true; | |
878 | } | |
879 | ||
880 | /* This is stupid. This function should be a boolean predicate */ | |
881 | static long | |
882 | b_out_canonicalize_reloc (abfd, section, relptr, symbols) | |
883 | bfd *abfd; | |
884 | sec_ptr section; | |
885 | arelent **relptr; | |
886 | asymbol **symbols; | |
887 | { | |
888 | arelent *tblptr; | |
889 | unsigned int count; | |
890 | ||
891 | if ((section->flags & SEC_CONSTRUCTOR) != 0) | |
892 | { | |
893 | arelent_chain *chain = section->constructor_chain; | |
894 | for (count = 0; count < section->reloc_count; count++) | |
895 | { | |
896 | *relptr++ = &chain->relent; | |
897 | chain = chain->next; | |
898 | } | |
899 | } | |
900 | else | |
901 | { | |
902 | if (section->relocation == NULL | |
903 | && ! b_out_slurp_reloc_table (abfd, section, symbols)) | |
904 | return -1; | |
905 | ||
906 | tblptr = section->relocation; | |
907 | for (count = 0; count++ < section->reloc_count;) | |
908 | *relptr++ = tblptr++; | |
909 | } | |
910 | ||
911 | *relptr = NULL; | |
912 | ||
913 | return section->reloc_count; | |
914 | } | |
915 | ||
916 | static long | |
917 | b_out_get_reloc_upper_bound (abfd, asect) | |
918 | bfd *abfd; | |
919 | sec_ptr asect; | |
920 | { | |
921 | if (bfd_get_format (abfd) != bfd_object) { | |
922 | bfd_set_error (bfd_error_invalid_operation); | |
923 | return -1; | |
924 | } | |
925 | ||
926 | if (asect->flags & SEC_CONSTRUCTOR) | |
927 | return sizeof (arelent *) * (asect->reloc_count + 1); | |
928 | ||
929 | if (asect == obj_datasec (abfd)) | |
930 | return (sizeof (arelent *) * | |
931 | ((exec_hdr(abfd)->a_drsize / sizeof (struct relocation_info)) | |
932 | +1)); | |
933 | ||
934 | if (asect == obj_textsec (abfd)) | |
935 | return (sizeof (arelent *) * | |
936 | ((exec_hdr(abfd)->a_trsize / sizeof (struct relocation_info)) | |
937 | +1)); | |
938 | ||
939 | if (asect == obj_bsssec (abfd)) | |
940 | return 0; | |
941 | ||
942 | bfd_set_error (bfd_error_invalid_operation); | |
943 | return -1; | |
944 | } | |
945 | \f | |
946 | static boolean | |
947 | b_out_set_section_contents (abfd, section, location, offset, count) | |
948 | bfd *abfd; | |
949 | asection *section; | |
950 | PTR location; | |
951 | file_ptr offset; | |
952 | bfd_size_type count; | |
953 | { | |
954 | ||
955 | if (abfd->output_has_begun == false) { /* set by bfd.c handler */ | |
956 | if (! aout_32_make_sections (abfd)) | |
957 | return false; | |
958 | ||
959 | obj_textsec (abfd)->filepos = sizeof(struct internal_exec); | |
960 | obj_datasec(abfd)->filepos = obj_textsec(abfd)->filepos | |
961 | + obj_textsec (abfd)->_raw_size; | |
962 | ||
963 | } | |
964 | /* regardless, once we know what we're doing, we might as well get going */ | |
965 | if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0) | |
966 | return false; | |
967 | ||
968 | if (count != 0) { | |
969 | return (bfd_write ((PTR)location, 1, count, abfd) == count) ?true:false; | |
970 | } | |
971 | return true; | |
972 | } | |
973 | ||
974 | static boolean | |
975 | b_out_set_arch_mach (abfd, arch, machine) | |
976 | bfd *abfd; | |
977 | enum bfd_architecture arch; | |
978 | unsigned long machine; | |
979 | { | |
980 | bfd_default_set_arch_mach(abfd, arch, machine); | |
981 | ||
982 | if (arch == bfd_arch_unknown) /* Unknown machine arch is OK */ | |
983 | return true; | |
984 | if (arch == bfd_arch_i960) /* i960 default is OK */ | |
985 | switch (machine) { | |
986 | case bfd_mach_i960_core: | |
987 | case bfd_mach_i960_kb_sb: | |
988 | case bfd_mach_i960_mc: | |
989 | case bfd_mach_i960_xa: | |
990 | case bfd_mach_i960_ca: | |
991 | case bfd_mach_i960_ka_sa: | |
992 | case bfd_mach_i960_jx: | |
993 | case bfd_mach_i960_hx: | |
994 | case 0: | |
995 | return true; | |
996 | default: | |
997 | return false; | |
998 | } | |
999 | ||
1000 | return false; | |
1001 | } | |
1002 | ||
1003 | static int | |
1004 | b_out_sizeof_headers (ignore_abfd, ignore) | |
5f771d47 ILT |
1005 | bfd *ignore_abfd ATTRIBUTE_UNUSED; |
1006 | boolean ignore ATTRIBUTE_UNUSED; | |
252b5132 RH |
1007 | { |
1008 | return sizeof(struct internal_exec); | |
1009 | } | |
1010 | ||
1011 | ||
1012 | ||
1013 | /************************************************************************/ | |
1014 | static bfd_vma | |
1015 | get_value (reloc, link_info, input_section) | |
1016 | arelent *reloc; | |
1017 | struct bfd_link_info *link_info; | |
1018 | asection *input_section; | |
1019 | { | |
1020 | bfd_vma value; | |
1021 | asymbol *symbol = *(reloc->sym_ptr_ptr); | |
1022 | ||
1023 | /* A symbol holds a pointer to a section, and an offset from the | |
1024 | base of the section. To relocate, we find where the section will | |
1025 | live in the output and add that in */ | |
1026 | ||
1027 | if (bfd_is_und_section (symbol->section)) | |
1028 | { | |
1029 | struct bfd_link_hash_entry *h; | |
1030 | ||
1031 | /* The symbol is undefined in this BFD. Look it up in the | |
1032 | global linker hash table. FIXME: This should be changed when | |
1033 | we convert b.out to use a specific final_link function and | |
1034 | change the interface to bfd_relax_section to not require the | |
1035 | generic symbols. */ | |
1036 | h = bfd_wrapped_link_hash_lookup (input_section->owner, link_info, | |
1037 | bfd_asymbol_name (symbol), | |
1038 | false, false, true); | |
1039 | if (h != (struct bfd_link_hash_entry *) NULL | |
1040 | && (h->type == bfd_link_hash_defined | |
1041 | || h->type == bfd_link_hash_defweak)) | |
1042 | value = h->u.def.value + output_addr (h->u.def.section); | |
1043 | else if (h != (struct bfd_link_hash_entry *) NULL | |
1044 | && h->type == bfd_link_hash_common) | |
1045 | value = h->u.c.size; | |
1046 | else | |
1047 | { | |
1048 | if (! ((*link_info->callbacks->undefined_symbol) | |
1049 | (link_info, bfd_asymbol_name (symbol), | |
1050 | input_section->owner, input_section, reloc->address))) | |
1051 | abort (); | |
1052 | value = 0; | |
1053 | } | |
1054 | } | |
1055 | else | |
1056 | { | |
1057 | value = symbol->value + output_addr (symbol->section); | |
1058 | } | |
1059 | ||
1060 | /* Add the value contained in the relocation */ | |
1061 | value += reloc->addend; | |
1062 | ||
1063 | return value; | |
1064 | } | |
1065 | ||
1066 | static void | |
1067 | perform_slip (abfd, slip, input_section, value) | |
1068 | bfd *abfd; | |
1069 | unsigned int slip; | |
1070 | asection *input_section; | |
1071 | bfd_vma value; | |
1072 | { | |
1073 | asymbol **s; | |
1074 | ||
1075 | s = _bfd_generic_link_get_symbols (abfd); | |
1076 | BFD_ASSERT (s != (asymbol **) NULL); | |
1077 | ||
1078 | /* Find all symbols past this point, and make them know | |
1079 | what's happened */ | |
1080 | while (*s) | |
1081 | { | |
1082 | asymbol *p = *s; | |
1083 | if (p->section == input_section) | |
1084 | { | |
1085 | /* This was pointing into this section, so mangle it */ | |
1086 | if (p->value > value) | |
1087 | { | |
1088 | p->value -=slip; | |
1089 | if (p->udata.p != NULL) | |
1090 | { | |
1091 | struct generic_link_hash_entry *h; | |
1092 | ||
1093 | h = (struct generic_link_hash_entry *) p->udata.p; | |
1094 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); | |
1095 | h->root.u.def.value -= slip; | |
1096 | BFD_ASSERT (h->root.u.def.value == p->value); | |
1097 | } | |
1098 | } | |
1099 | } | |
1100 | s++; | |
1101 | ||
1102 | } | |
1103 | } | |
1104 | ||
1105 | /* This routine works out if the thing we want to get to can be | |
1106 | reached with a 24bit offset instead of a 32 bit one. | |
1107 | If it can, then it changes the amode */ | |
1108 | ||
1109 | static int | |
1110 | abs32code (abfd, input_section, r, shrink, link_info) | |
1111 | bfd *abfd; | |
1112 | asection *input_section; | |
1113 | arelent *r; | |
1114 | unsigned int shrink; | |
1115 | struct bfd_link_info *link_info; | |
1116 | { | |
1117 | bfd_vma value = get_value (r, link_info, input_section); | |
1118 | bfd_vma dot = output_addr (input_section) + r->address; | |
1119 | bfd_vma gap; | |
1120 | ||
1121 | /* See if the address we're looking at within 2^23 bytes of where | |
1122 | we are, if so then we can use a small branch rather than the | |
1123 | jump we were going to */ | |
1124 | ||
1125 | gap = value - (dot - shrink); | |
1126 | ||
1127 | ||
1128 | if (-1<<23 < (long)gap && (long)gap < 1<<23 ) | |
1129 | { | |
1130 | /* Change the reloc type from 32bitcode possible 24, to 24bit | |
1131 | possible 32 */ | |
1132 | ||
1133 | r->howto = &howto_reloc_abs32codeshrunk; | |
1134 | /* The place to relc moves back by four bytes */ | |
1135 | r->address -=4; | |
1136 | ||
1137 | /* This will be four bytes smaller in the long run */ | |
1138 | shrink += 4 ; | |
1139 | perform_slip (abfd, 4, input_section, r->address-shrink + 4); | |
1140 | } | |
1141 | return shrink; | |
1142 | } | |
1143 | ||
1144 | static int | |
1145 | aligncode (abfd, input_section, r, shrink) | |
1146 | bfd *abfd; | |
1147 | asection *input_section; | |
1148 | arelent *r; | |
1149 | unsigned int shrink; | |
1150 | { | |
1151 | bfd_vma dot = output_addr (input_section) + r->address; | |
1152 | bfd_vma gap; | |
1153 | bfd_vma old_end; | |
1154 | bfd_vma new_end; | |
1155 | int shrink_delta; | |
1156 | int size = r->howto->size; | |
1157 | ||
1158 | /* Reduce the size of the alignment so that it's still aligned but | |
1159 | smaller - the current size is already the same size as or bigger | |
1160 | than the alignment required. */ | |
1161 | ||
1162 | /* calculate the first byte following the padding before we optimize */ | |
1163 | old_end = ((dot + size ) & ~size) + size+1; | |
1164 | /* work out where the new end will be - remember that we're smaller | |
1165 | than we used to be */ | |
1166 | new_end = ((dot - shrink + size) & ~size); | |
1167 | ||
1168 | /* This is the new end */ | |
1169 | gap = old_end - ((dot + size) & ~size); | |
1170 | ||
1171 | shrink_delta = (old_end - new_end) - shrink; | |
1172 | ||
1173 | if (shrink_delta) | |
1174 | { | |
1175 | /* Change the reloc so that it knows how far to align to */ | |
1176 | r->howto = howto_done_align_table + (r->howto - howto_align_table); | |
1177 | ||
1178 | /* Encode the stuff into the addend - for future use we need to | |
1179 | know how big the reloc used to be */ | |
1180 | r->addend = old_end - dot + r->address; | |
1181 | ||
1182 | /* This will be N bytes smaller in the long run, adjust all the symbols */ | |
1183 | perform_slip (abfd, shrink_delta, input_section, r->address - shrink); | |
1184 | shrink += shrink_delta; | |
1185 | } | |
1186 | return shrink; | |
1187 | } | |
1188 | ||
1189 | static boolean | |
1190 | b_out_bfd_relax_section (abfd, i, link_info, again) | |
1191 | bfd *abfd; | |
1192 | asection *i; | |
1193 | struct bfd_link_info *link_info; | |
1194 | boolean *again; | |
1195 | { | |
1196 | /* Get enough memory to hold the stuff */ | |
1197 | bfd *input_bfd = i->owner; | |
1198 | asection *input_section = i; | |
1199 | int shrink = 0 ; | |
1200 | arelent **reloc_vector = NULL; | |
1201 | long reloc_size = bfd_get_reloc_upper_bound(input_bfd, | |
1202 | input_section); | |
1203 | ||
1204 | if (reloc_size < 0) | |
1205 | return false; | |
1206 | ||
1207 | /* We only run this relaxation once. It might work to run it | |
1208 | multiple times, but it hasn't been tested. */ | |
1209 | *again = false; | |
1210 | ||
1211 | if (reloc_size) | |
1212 | { | |
1213 | long reloc_count; | |
1214 | ||
1215 | reloc_vector = (arelent **) bfd_malloc (reloc_size); | |
1216 | if (reloc_vector == NULL && reloc_size != 0) | |
1217 | goto error_return; | |
1218 | ||
1219 | /* Get the relocs and think about them */ | |
1220 | reloc_count = | |
1221 | bfd_canonicalize_reloc (input_bfd, input_section, reloc_vector, | |
1222 | _bfd_generic_link_get_symbols (input_bfd)); | |
1223 | if (reloc_count < 0) | |
1224 | goto error_return; | |
1225 | if (reloc_count > 0) | |
1226 | { | |
1227 | arelent **parent; | |
1228 | for (parent = reloc_vector; *parent; parent++) | |
1229 | { | |
1230 | arelent *r = *parent; | |
1231 | switch (r->howto->type) | |
1232 | { | |
1233 | case ALIGNER: | |
1234 | /* An alignment reloc */ | |
1235 | shrink = aligncode (abfd, input_section, r, shrink); | |
1236 | break; | |
1237 | case ABS32CODE: | |
1238 | /* A 32bit reloc in an addressing mode */ | |
1239 | shrink = abs32code (input_bfd, input_section, r, shrink, | |
1240 | link_info); | |
1241 | break; | |
1242 | case ABS32CODE_SHRUNK: | |
1243 | shrink+=4; | |
1244 | break; | |
1245 | } | |
1246 | } | |
1247 | } | |
1248 | } | |
1249 | input_section->_cooked_size = input_section->_raw_size - shrink; | |
1250 | ||
1251 | if (reloc_vector != NULL) | |
1252 | free (reloc_vector); | |
1253 | return true; | |
1254 | error_return: | |
1255 | if (reloc_vector != NULL) | |
1256 | free (reloc_vector); | |
1257 | return false; | |
1258 | } | |
1259 | ||
1260 | static bfd_byte * | |
1261 | b_out_bfd_get_relocated_section_contents (output_bfd, link_info, link_order, | |
1262 | data, relocateable, symbols) | |
1263 | bfd *output_bfd; | |
1264 | struct bfd_link_info *link_info; | |
1265 | struct bfd_link_order *link_order; | |
1266 | bfd_byte *data; | |
1267 | boolean relocateable; | |
1268 | asymbol **symbols; | |
1269 | { | |
1270 | /* Get enough memory to hold the stuff */ | |
1271 | bfd *input_bfd = link_order->u.indirect.section->owner; | |
1272 | asection *input_section = link_order->u.indirect.section; | |
1273 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, | |
1274 | input_section); | |
1275 | arelent **reloc_vector = NULL; | |
1276 | long reloc_count; | |
1277 | ||
1278 | if (reloc_size < 0) | |
1279 | goto error_return; | |
1280 | ||
1281 | /* If producing relocateable output, don't bother to relax. */ | |
1282 | if (relocateable) | |
1283 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
1284 | link_order, | |
1285 | data, relocateable, | |
1286 | symbols); | |
1287 | ||
1288 | reloc_vector = (arelent **) bfd_malloc (reloc_size); | |
1289 | if (reloc_vector == NULL && reloc_size != 0) | |
1290 | goto error_return; | |
1291 | ||
1292 | input_section->reloc_done = 1; | |
1293 | ||
1294 | /* read in the section */ | |
1295 | BFD_ASSERT (true == bfd_get_section_contents (input_bfd, | |
1296 | input_section, | |
1297 | data, | |
1298 | 0, | |
1299 | input_section->_raw_size)); | |
1300 | ||
1301 | reloc_count = bfd_canonicalize_reloc (input_bfd, | |
1302 | input_section, | |
1303 | reloc_vector, | |
1304 | symbols); | |
1305 | if (reloc_count < 0) | |
1306 | goto error_return; | |
1307 | if (reloc_count > 0) | |
1308 | { | |
1309 | arelent **parent = reloc_vector; | |
1310 | arelent *reloc ; | |
1311 | ||
1312 | unsigned int dst_address = 0; | |
1313 | unsigned int src_address = 0; | |
1314 | unsigned int run; | |
1315 | unsigned int idx; | |
1316 | ||
1317 | /* Find how long a run we can do */ | |
1318 | while (dst_address < link_order->size) | |
1319 | { | |
1320 | reloc = *parent; | |
1321 | if (reloc) | |
1322 | { | |
1323 | /* Note that the relaxing didn't tie up the addresses in the | |
1324 | relocation, so we use the original address to work out the | |
1325 | run of non-relocated data */ | |
1326 | BFD_ASSERT (reloc->address >= src_address); | |
1327 | run = reloc->address - src_address; | |
1328 | parent++; | |
1329 | } | |
1330 | else | |
1331 | { | |
1332 | run = link_order->size - dst_address; | |
1333 | } | |
1334 | /* Copy the bytes */ | |
1335 | for (idx = 0; idx < run; idx++) | |
1336 | { | |
1337 | data[dst_address++] = data[src_address++]; | |
1338 | } | |
1339 | ||
1340 | /* Now do the relocation */ | |
1341 | ||
1342 | if (reloc) | |
1343 | { | |
1344 | switch (reloc->howto->type) | |
1345 | { | |
1346 | case ABS32CODE: | |
1347 | calljx_callback (input_bfd, link_info, reloc, | |
1348 | src_address + data, dst_address + data, | |
1349 | input_section); | |
1350 | src_address+=4; | |
1351 | dst_address+=4; | |
1352 | break; | |
1353 | case ABS32: | |
1354 | bfd_put_32 (input_bfd, | |
1355 | (bfd_get_32 (input_bfd, data + src_address) | |
1356 | + get_value (reloc, link_info, input_section)), | |
1357 | data + dst_address); | |
1358 | src_address+=4; | |
1359 | dst_address+=4; | |
1360 | break; | |
1361 | case CALLJ: | |
1362 | callj_callback (input_bfd, link_info, reloc, data, | |
1363 | src_address, dst_address, input_section, | |
1364 | false); | |
1365 | src_address+=4; | |
1366 | dst_address+=4; | |
1367 | break; | |
1368 | case ALIGNDONE: | |
1369 | BFD_ASSERT (reloc->addend >= src_address); | |
1370 | BFD_ASSERT (reloc->addend <= input_section->_raw_size); | |
1371 | src_address = reloc->addend; | |
1372 | dst_address = ((dst_address + reloc->howto->size) | |
1373 | & ~reloc->howto->size); | |
1374 | break; | |
1375 | case ABS32CODE_SHRUNK: | |
1376 | /* This used to be a callx, but we've found out that a | |
1377 | callj will reach, so do the right thing. */ | |
1378 | callj_callback (input_bfd, link_info, reloc, data, | |
1379 | src_address + 4, dst_address, input_section, | |
1380 | true); | |
1381 | dst_address+=4; | |
1382 | src_address+=8; | |
1383 | break; | |
1384 | case PCREL24: | |
1385 | { | |
1386 | long int word = bfd_get_32 (input_bfd, | |
1387 | data + src_address); | |
1388 | bfd_vma value; | |
1389 | ||
1390 | value = get_value (reloc, link_info, input_section); | |
1391 | word = ((word & ~BAL_MASK) | |
1392 | | (((word & BAL_MASK) | |
1393 | + value | |
1394 | - output_addr (input_section) | |
1395 | + reloc->addend) | |
1396 | & BAL_MASK)); | |
1397 | ||
1398 | bfd_put_32 (input_bfd, word, data + dst_address); | |
1399 | dst_address+=4; | |
1400 | src_address+=4; | |
1401 | ||
1402 | } | |
1403 | break; | |
1404 | ||
1405 | case PCREL13: | |
1406 | { | |
1407 | long int word = bfd_get_32 (input_bfd, | |
1408 | data + src_address); | |
1409 | bfd_vma value; | |
1410 | ||
1411 | value = get_value (reloc, link_info, input_section); | |
1412 | word = ((word & ~PCREL13_MASK) | |
1413 | | (((word & PCREL13_MASK) | |
1414 | + value | |
1415 | + reloc->addend | |
1416 | - output_addr (input_section)) | |
1417 | & PCREL13_MASK)); | |
1418 | ||
1419 | bfd_put_32 (input_bfd, word, data + dst_address); | |
1420 | dst_address+=4; | |
1421 | src_address+=4; | |
1422 | ||
1423 | } | |
1424 | break; | |
1425 | ||
1426 | default: | |
1427 | abort(); | |
1428 | } | |
1429 | } | |
1430 | } | |
1431 | } | |
1432 | if (reloc_vector != NULL) | |
1433 | free (reloc_vector); | |
1434 | return data; | |
1435 | error_return: | |
1436 | if (reloc_vector != NULL) | |
1437 | free (reloc_vector); | |
1438 | return NULL; | |
1439 | } | |
1440 | /***********************************************************************/ | |
1441 | ||
1442 | /* Build the transfer vectors for Big and Little-Endian B.OUT files. */ | |
1443 | ||
1444 | #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol | |
1445 | #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info | |
1446 | ||
1447 | #define b_out_bfd_link_hash_table_create _bfd_generic_link_hash_table_create | |
1448 | #define b_out_bfd_link_add_symbols _bfd_generic_link_add_symbols | |
1449 | #define b_out_bfd_final_link _bfd_generic_final_link | |
1450 | #define b_out_bfd_link_split_section _bfd_generic_link_split_section | |
1451 | #define b_out_bfd_gc_sections bfd_generic_gc_sections | |
1452 | ||
1453 | #define aout_32_get_section_contents_in_window \ | |
1454 | _bfd_generic_get_section_contents_in_window | |
1455 | ||
1456 | const bfd_target b_out_vec_big_host = | |
1457 | { | |
1458 | "b.out.big", /* name */ | |
1459 | bfd_target_aout_flavour, | |
1460 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
1461 | BFD_ENDIAN_BIG, /* hdr byte order is big */ | |
1462 | (HAS_RELOC | EXEC_P | /* object flags */ | |
1463 | HAS_LINENO | HAS_DEBUG | | |
1464 | HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ), | |
1465 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), | |
1466 | '_', /* symbol leading char */ | |
1467 | ' ', /* ar_pad_char */ | |
1468 | 16, /* ar_max_namelen */ | |
1469 | ||
1470 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
1471 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
1472 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
1473 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
1474 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
1475 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ | |
1476 | {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */ | |
1477 | bfd_generic_archive_p, _bfd_dummy_target}, | |
1478 | {bfd_false, b_out_mkobject, /* bfd_set_format */ | |
1479 | _bfd_generic_mkarchive, bfd_false}, | |
1480 | {bfd_false, b_out_write_object_contents, /* bfd_write_contents */ | |
1481 | _bfd_write_archive_contents, bfd_false}, | |
1482 | ||
1483 | BFD_JUMP_TABLE_GENERIC (aout_32), | |
1484 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
1485 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
1486 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), | |
1487 | BFD_JUMP_TABLE_SYMBOLS (aout_32), | |
1488 | BFD_JUMP_TABLE_RELOCS (b_out), | |
1489 | BFD_JUMP_TABLE_WRITE (b_out), | |
1490 | BFD_JUMP_TABLE_LINK (b_out), | |
1491 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
1492 | ||
1493 | (PTR) 0, | |
1494 | }; | |
1495 | ||
1496 | ||
1497 | const bfd_target b_out_vec_little_host = | |
1498 | { | |
1499 | "b.out.little", /* name */ | |
1500 | bfd_target_aout_flavour, | |
1501 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
1502 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
1503 | (HAS_RELOC | EXEC_P | /* object flags */ | |
1504 | HAS_LINENO | HAS_DEBUG | | |
1505 | HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ), | |
1506 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), | |
1507 | '_', /* symbol leading char */ | |
1508 | ' ', /* ar_pad_char */ | |
1509 | 16, /* ar_max_namelen */ | |
1510 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
1511 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
1512 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
1513 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
1514 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
1515 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
1516 | ||
1517 | {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */ | |
1518 | bfd_generic_archive_p, _bfd_dummy_target}, | |
1519 | {bfd_false, b_out_mkobject, /* bfd_set_format */ | |
1520 | _bfd_generic_mkarchive, bfd_false}, | |
1521 | {bfd_false, b_out_write_object_contents, /* bfd_write_contents */ | |
1522 | _bfd_write_archive_contents, bfd_false}, | |
1523 | ||
1524 | BFD_JUMP_TABLE_GENERIC (aout_32), | |
1525 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
1526 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
1527 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), | |
1528 | BFD_JUMP_TABLE_SYMBOLS (aout_32), | |
1529 | BFD_JUMP_TABLE_RELOCS (b_out), | |
1530 | BFD_JUMP_TABLE_WRITE (b_out), | |
1531 | BFD_JUMP_TABLE_LINK (b_out), | |
1532 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
1533 | ||
1534 | (PTR) 0 | |
1535 | }; |