Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* BFD back-end for Intel 960 b.out binaries. |
7898deda NC |
2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
3 | 2000 | |
5f771d47 | 4 | Free Software Foundation, Inc. |
252b5132 RH |
5 | Written by Cygnus Support. |
6 | ||
7 | This file is part of BFD, the Binary File Descriptor library. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
22 | ||
252b5132 RH |
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 | ||
252b5132 RH |
33 | static int aligncode PARAMS ((bfd *abfd, asection *input_section, |
34 | arelent *r, unsigned int shrink)); | |
35 | static void perform_slip PARAMS ((bfd *abfd, unsigned int slip, | |
36 | asection *input_section, bfd_vma value)); | |
37 | static boolean b_out_squirt_out_relocs PARAMS ((bfd *abfd, asection *section)); | |
38 | static const bfd_target *b_out_callback PARAMS ((bfd *)); | |
39 | static bfd_reloc_status_type calljx_callback | |
40 | PARAMS ((bfd *, struct bfd_link_info *, arelent *, PTR src, PTR dst, | |
41 | asection *)); | |
42 | static bfd_reloc_status_type callj_callback | |
43 | PARAMS ((bfd *, struct bfd_link_info *, arelent *, PTR data, | |
44 | unsigned int srcidx, unsigned int dstidx, asection *, boolean)); | |
45 | static bfd_vma get_value PARAMS ((arelent *, struct bfd_link_info *, | |
46 | asection *)); | |
47 | static int abs32code PARAMS ((bfd *, asection *, arelent *, | |
48 | unsigned int, struct bfd_link_info *)); | |
49 | static boolean b_out_bfd_relax_section PARAMS ((bfd *, asection *, | |
50 | struct bfd_link_info *, | |
51 | boolean *)); | |
52 | static bfd_byte *b_out_bfd_get_relocated_section_contents | |
53 | PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, | |
54 | bfd_byte *, boolean, asymbol **)); | |
55 | ||
56 | /* Swaps the information in an executable header taken from a raw byte | |
57 | stream memory image, into the internal exec_header structure. */ | |
58 | ||
59 | void | |
60 | bout_swap_exec_header_in (abfd, raw_bytes, execp) | |
61 | bfd *abfd; | |
62 | struct external_exec *raw_bytes; | |
63 | struct internal_exec *execp; | |
64 | { | |
65 | struct external_exec *bytes = (struct external_exec *)raw_bytes; | |
66 | ||
67 | /* Now fill in fields in the execp, from the bytes in the raw data. */ | |
68 | execp->a_info = bfd_h_get_32 (abfd, bytes->e_info); | |
69 | execp->a_text = GET_WORD (abfd, bytes->e_text); | |
70 | execp->a_data = GET_WORD (abfd, bytes->e_data); | |
71 | execp->a_bss = GET_WORD (abfd, bytes->e_bss); | |
72 | execp->a_syms = GET_WORD (abfd, bytes->e_syms); | |
73 | execp->a_entry = GET_WORD (abfd, bytes->e_entry); | |
74 | execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); | |
75 | execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); | |
76 | execp->a_tload = GET_WORD (abfd, bytes->e_tload); | |
77 | execp->a_dload = GET_WORD (abfd, bytes->e_dload); | |
78 | execp->a_talign = bytes->e_talign[0]; | |
79 | execp->a_dalign = bytes->e_dalign[0]; | |
80 | execp->a_balign = bytes->e_balign[0]; | |
81 | execp->a_relaxable = bytes->e_relaxable[0]; | |
82 | } | |
83 | ||
84 | /* Swaps the information in an internal exec header structure into the | |
85 | supplied buffer ready for writing to disk. */ | |
86 | ||
87 | PROTO(void, bout_swap_exec_header_out, | |
88 | (bfd *abfd, | |
89 | struct internal_exec *execp, | |
90 | struct external_exec *raw_bytes)); | |
91 | void | |
92 | bout_swap_exec_header_out (abfd, execp, raw_bytes) | |
93 | bfd *abfd; | |
94 | struct internal_exec *execp; | |
95 | struct external_exec *raw_bytes; | |
96 | { | |
97 | struct external_exec *bytes = (struct external_exec *)raw_bytes; | |
98 | ||
aebad5fe | 99 | /* Now fill in fields in the raw data, from the fields in the exec struct. */ |
252b5132 RH |
100 | bfd_h_put_32 (abfd, execp->a_info , bytes->e_info); |
101 | PUT_WORD (abfd, execp->a_text , bytes->e_text); | |
102 | PUT_WORD (abfd, execp->a_data , bytes->e_data); | |
103 | PUT_WORD (abfd, execp->a_bss , bytes->e_bss); | |
104 | PUT_WORD (abfd, execp->a_syms , bytes->e_syms); | |
105 | PUT_WORD (abfd, execp->a_entry , bytes->e_entry); | |
106 | PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); | |
107 | PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); | |
108 | PUT_WORD (abfd, execp->a_tload , bytes->e_tload); | |
109 | PUT_WORD (abfd, execp->a_dload , bytes->e_dload); | |
110 | bytes->e_talign[0] = execp->a_talign; | |
111 | bytes->e_dalign[0] = execp->a_dalign; | |
112 | bytes->e_balign[0] = execp->a_balign; | |
113 | bytes->e_relaxable[0] = execp->a_relaxable; | |
114 | } | |
115 | ||
252b5132 RH |
116 | static const bfd_target * |
117 | b_out_object_p (abfd) | |
118 | bfd *abfd; | |
119 | { | |
120 | struct internal_exec anexec; | |
121 | struct external_exec exec_bytes; | |
122 | ||
123 | if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd) | |
124 | != EXEC_BYTES_SIZE) { | |
125 | if (bfd_get_error () != bfd_error_system_call) | |
126 | bfd_set_error (bfd_error_wrong_format); | |
127 | return 0; | |
128 | } | |
129 | ||
130 | anexec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info); | |
131 | ||
132 | if (N_BADMAG (anexec)) { | |
133 | bfd_set_error (bfd_error_wrong_format); | |
134 | return 0; | |
135 | } | |
136 | ||
137 | bout_swap_exec_header_in (abfd, &exec_bytes, &anexec); | |
138 | return aout_32_some_aout_object_p (abfd, &anexec, b_out_callback); | |
139 | } | |
140 | ||
252b5132 RH |
141 | /* Finish up the opening of a b.out file for reading. Fill in all the |
142 | fields that are not handled by common code. */ | |
143 | ||
144 | static const bfd_target * | |
145 | b_out_callback (abfd) | |
146 | bfd *abfd; | |
147 | { | |
148 | struct internal_exec *execp = exec_hdr (abfd); | |
149 | unsigned long bss_start; | |
150 | ||
151 | /* Architecture and machine type */ | |
152 | bfd_set_arch_mach(abfd, | |
153 | bfd_arch_i960, /* B.out only used on i960 */ | |
154 | bfd_mach_i960_core /* Default */ | |
155 | ); | |
156 | ||
157 | /* The positions of the string table and symbol table. */ | |
158 | obj_str_filepos (abfd) = N_STROFF (*execp); | |
159 | obj_sym_filepos (abfd) = N_SYMOFF (*execp); | |
160 | ||
161 | /* The alignments of the sections */ | |
162 | obj_textsec (abfd)->alignment_power = execp->a_talign; | |
163 | obj_datasec (abfd)->alignment_power = execp->a_dalign; | |
164 | obj_bsssec (abfd)->alignment_power = execp->a_balign; | |
165 | ||
166 | /* The starting addresses of the sections. */ | |
167 | obj_textsec (abfd)->vma = execp->a_tload; | |
168 | obj_datasec (abfd)->vma = execp->a_dload; | |
169 | ||
170 | obj_textsec (abfd)->lma = obj_textsec (abfd)->vma; | |
171 | obj_datasec (abfd)->lma = obj_datasec (abfd)->vma; | |
172 | ||
173 | /* And reload the sizes, since the aout module zaps them */ | |
174 | obj_textsec (abfd)->_raw_size = execp->a_text; | |
175 | ||
176 | bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section */ | |
177 | obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign); | |
178 | ||
179 | obj_bsssec (abfd)->lma = obj_bsssec (abfd)->vma; | |
180 | ||
181 | /* The file positions of the sections */ | |
182 | obj_textsec (abfd)->filepos = N_TXTOFF(*execp); | |
183 | obj_datasec (abfd)->filepos = N_DATOFF(*execp); | |
184 | ||
185 | /* The file positions of the relocation info */ | |
186 | obj_textsec (abfd)->rel_filepos = N_TROFF(*execp); | |
187 | obj_datasec (abfd)->rel_filepos = N_DROFF(*execp); | |
188 | ||
aebad5fe KH |
189 | adata(abfd).page_size = 1; /* Not applicable. */ |
190 | adata(abfd).segment_size = 1; /* Not applicable. */ | |
252b5132 RH |
191 | adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE; |
192 | ||
193 | if (execp->a_relaxable) | |
194 | abfd->flags |= BFD_IS_RELAXABLE; | |
195 | return abfd->xvec; | |
196 | } | |
197 | ||
198 | struct bout_data_struct { | |
199 | struct aoutdata a; | |
200 | struct internal_exec e; | |
201 | }; | |
202 | ||
203 | static boolean | |
204 | b_out_mkobject (abfd) | |
205 | bfd *abfd; | |
206 | { | |
207 | struct bout_data_struct *rawptr; | |
208 | ||
209 | rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, sizeof (struct bout_data_struct)); | |
210 | if (rawptr == NULL) | |
211 | return false; | |
212 | ||
213 | abfd->tdata.bout_data = rawptr; | |
214 | exec_hdr (abfd) = &rawptr->e; | |
215 | ||
216 | obj_textsec (abfd) = (asection *)NULL; | |
217 | obj_datasec (abfd) = (asection *)NULL; | |
218 | obj_bsssec (abfd) = (asection *)NULL; | |
219 | ||
220 | return true; | |
221 | } | |
222 | ||
223 | static int | |
224 | b_out_symbol_cmp (a, b) | |
225 | struct aout_symbol **a, **b; | |
226 | { | |
227 | asection *sec; | |
228 | bfd_vma av, bv; | |
229 | ||
230 | /* Primary key is address */ | |
231 | sec = bfd_get_section (&(*a)->symbol); | |
232 | av = sec->output_section->vma + sec->output_offset + (*a)->symbol.value; | |
233 | sec = bfd_get_section (&(*b)->symbol); | |
234 | bv = sec->output_section->vma + sec->output_offset + (*b)->symbol.value; | |
235 | ||
236 | if (av < bv) | |
237 | return -1; | |
238 | if (av > bv) | |
239 | return 1; | |
240 | ||
241 | /* Secondary key puts CALLNAME syms last and BALNAME syms first, so | |
242 | that they have the best chance of being contiguous. */ | |
243 | if (IS_BALNAME ((*a)->other) || IS_CALLNAME ((*b)->other)) | |
244 | return -1; | |
245 | if (IS_CALLNAME ((*a)->other) || IS_BALNAME ((*b)->other)) | |
246 | return 1; | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | static boolean | |
252 | b_out_write_object_contents (abfd) | |
253 | bfd *abfd; | |
254 | { | |
255 | struct external_exec swapped_hdr; | |
256 | ||
257 | if (! aout_32_make_sections (abfd)) | |
258 | return false; | |
259 | ||
260 | exec_hdr (abfd)->a_info = BMAGIC; | |
261 | ||
262 | exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size; | |
263 | exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size; | |
264 | exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size; | |
265 | exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist); | |
266 | exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); | |
267 | exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) * | |
268 | sizeof (struct relocation_info)); | |
269 | exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) * | |
270 | sizeof (struct relocation_info)); | |
271 | ||
272 | exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power; | |
273 | exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power; | |
274 | exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power; | |
275 | ||
276 | exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma; | |
277 | exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma; | |
278 | ||
279 | bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr); | |
280 | ||
281 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 | |
282 | || (bfd_write ((PTR) &swapped_hdr, 1, EXEC_BYTES_SIZE, abfd) | |
283 | != EXEC_BYTES_SIZE)) | |
284 | return false; | |
285 | ||
286 | /* Now write out reloc info, followed by syms and strings */ | |
287 | if (bfd_get_symcount (abfd) != 0) | |
288 | { | |
289 | /* Make sure {CALL,BAL}NAME symbols remain adjacent on output | |
290 | by sorting. This is complicated by the fact that stabs are | |
291 | also ordered. Solve this by shifting all stabs to the end | |
292 | in order, then sorting the rest. */ | |
293 | ||
294 | asymbol **outsyms, **p, **q; | |
295 | ||
296 | outsyms = bfd_get_outsymbols (abfd); | |
297 | p = outsyms + bfd_get_symcount (abfd); | |
298 | ||
299 | for (q = p--; p >= outsyms; p--) | |
300 | { | |
301 | if ((*p)->flags & BSF_DEBUGGING) | |
302 | { | |
303 | asymbol *t = *--q; | |
304 | *q = *p; | |
305 | *p = t; | |
306 | } | |
307 | } | |
308 | ||
309 | if (q > outsyms) | |
eb6e10cb | 310 | qsort (outsyms, q - outsyms, sizeof (asymbol*), b_out_symbol_cmp); |
252b5132 RH |
311 | |
312 | /* Back to your regularly scheduled program. */ | |
313 | ||
eb6e10cb | 314 | if (bfd_seek (abfd, (file_ptr) (N_SYMOFF(*exec_hdr(abfd))), SEEK_SET) |
252b5132 RH |
315 | != 0) |
316 | return false; | |
317 | ||
318 | if (! aout_32_write_syms (abfd)) | |
319 | return false; | |
320 | ||
eb6e10cb | 321 | if (bfd_seek (abfd, (file_ptr) (N_TROFF(*exec_hdr(abfd))), SEEK_SET) != 0) |
252b5132 RH |
322 | return false; |
323 | ||
324 | if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) return false; | |
eb6e10cb | 325 | if (bfd_seek (abfd, (file_ptr) (N_DROFF(*exec_hdr(abfd))), SEEK_SET) |
252b5132 RH |
326 | != 0) |
327 | return false; | |
328 | ||
329 | if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) return false; | |
330 | } | |
331 | return true; | |
332 | } | |
333 | \f | |
334 | /** Some reloc hackery */ | |
335 | ||
336 | #define CALLS 0x66003800 /* Template for 'calls' instruction */ | |
337 | #define BAL 0x0b000000 /* Template for 'bal' instruction */ | |
338 | #define BAL_MASK 0x00ffffff | |
339 | #define BALX 0x85f00000 /* Template for 'balx' instruction */ | |
340 | #define BALX_MASK 0x0007ffff | |
341 | #define CALL 0x09000000 | |
342 | #define PCREL13_MASK 0x1fff | |
343 | ||
252b5132 RH |
344 | #define output_addr(sec) ((sec)->output_offset+(sec)->output_section->vma) |
345 | ||
346 | /* Magic to turn callx into calljx */ | |
347 | static bfd_reloc_status_type | |
348 | calljx_callback (abfd, link_info, reloc_entry, src, dst, input_section) | |
349 | bfd *abfd; | |
350 | struct bfd_link_info *link_info; | |
351 | arelent *reloc_entry; | |
352 | PTR src; | |
353 | PTR dst; | |
354 | asection *input_section; | |
355 | { | |
356 | int word = bfd_get_32 (abfd, src); | |
357 | asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr); | |
358 | aout_symbol_type *symbol = aout_symbol (symbol_in); | |
359 | bfd_vma value; | |
360 | ||
361 | value = get_value (reloc_entry, link_info, input_section); | |
362 | ||
363 | if (IS_CALLNAME (symbol->other)) | |
364 | { | |
365 | aout_symbol_type *balsym = symbol+1; | |
366 | int inst = bfd_get_32 (abfd, (bfd_byte *) src-4); | |
367 | /* The next symbol should be an N_BALNAME */ | |
368 | BFD_ASSERT (IS_BALNAME (balsym->other)); | |
369 | inst &= BALX_MASK; | |
370 | inst |= BALX; | |
371 | bfd_put_32 (abfd, inst, (bfd_byte *) dst-4); | |
372 | symbol = balsym; | |
373 | value = (symbol->symbol.value | |
374 | + output_addr (symbol->symbol.section)); | |
375 | } | |
376 | ||
377 | word += value + reloc_entry->addend; | |
378 | ||
eb6e10cb | 379 | bfd_put_32 (abfd, word, dst); |
252b5132 RH |
380 | return bfd_reloc_ok; |
381 | } | |
382 | ||
252b5132 RH |
383 | /* Magic to turn call into callj */ |
384 | static bfd_reloc_status_type | |
385 | callj_callback (abfd, link_info, reloc_entry, data, srcidx, dstidx, | |
386 | input_section, shrinking) | |
387 | bfd *abfd; | |
388 | struct bfd_link_info *link_info; | |
389 | arelent *reloc_entry; | |
390 | PTR data; | |
391 | unsigned int srcidx; | |
392 | unsigned int dstidx; | |
393 | asection *input_section; | |
394 | boolean shrinking; | |
395 | { | |
396 | int word = bfd_get_32 (abfd, (bfd_byte *) data + srcidx); | |
397 | asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr); | |
398 | aout_symbol_type *symbol = aout_symbol (symbol_in); | |
399 | bfd_vma value; | |
400 | ||
401 | value = get_value (reloc_entry, link_info, input_section); | |
402 | ||
403 | if (IS_OTHER(symbol->other)) | |
404 | { | |
405 | /* Call to a system procedure - replace code with system | |
406 | procedure number. */ | |
407 | word = CALLS | (symbol->other - 1); | |
408 | } | |
409 | else if (IS_CALLNAME(symbol->other)) | |
410 | { | |
411 | aout_symbol_type *balsym = symbol+1; | |
412 | ||
413 | /* The next symbol should be an N_BALNAME. */ | |
414 | BFD_ASSERT(IS_BALNAME(balsym->other)); | |
aebad5fe | 415 | |
252b5132 RH |
416 | /* We are calling a leaf, so replace the call instruction with a |
417 | bal. */ | |
418 | word = BAL | ((word | |
419 | + output_addr (balsym->symbol.section) | |
420 | + balsym->symbol.value + reloc_entry->addend | |
421 | - dstidx | |
422 | - output_addr (input_section)) | |
423 | & BAL_MASK); | |
424 | } | |
425 | else if ((symbol->symbol.flags & BSF_SECTION_SYM) != 0) | |
426 | { | |
427 | /* A callj against a symbol in the same section is a fully | |
428 | resolved relative call. We don't need to do anything here. | |
429 | If the symbol is not in the same section, I'm not sure what | |
430 | to do; fortunately, this case will probably never arise. */ | |
431 | BFD_ASSERT (! shrinking); | |
432 | BFD_ASSERT (symbol->symbol.section == input_section); | |
433 | } | |
434 | else | |
435 | { | |
436 | word = CALL | (((word & BAL_MASK) | |
437 | + value | |
438 | + reloc_entry->addend | |
439 | - (shrinking ? dstidx : 0) | |
440 | - output_addr (input_section)) | |
441 | & BAL_MASK); | |
442 | } | |
eb6e10cb | 443 | bfd_put_32 (abfd, word, (bfd_byte *) data + dstidx); |
252b5132 RH |
444 | return bfd_reloc_ok; |
445 | } | |
446 | ||
447 | /* type rshift size bitsize pcrel bitpos absolute overflow check*/ | |
448 | ||
449 | #define ABS32CODE 0 | |
450 | #define ABS32CODE_SHRUNK 1 | |
451 | #define PCREL24 2 | |
452 | #define CALLJ 3 | |
453 | #define ABS32 4 | |
454 | #define PCREL13 5 | |
455 | #define ABS32_MAYBE_RELAXABLE 1 | |
456 | #define ABS32_WAS_RELAXABLE 2 | |
457 | ||
458 | #define ALIGNER 10 | |
459 | #define ALIGNDONE 11 | |
460 | static reloc_howto_type howto_reloc_callj = | |
461 | HOWTO(CALLJ, 0, 2, 24, true, 0, complain_overflow_signed, 0,"callj", true, 0x00ffffff, 0x00ffffff,false); | |
462 | static reloc_howto_type howto_reloc_abs32 = | |
463 | HOWTO(ABS32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"abs32", true, 0xffffffff,0xffffffff,false); | |
464 | static reloc_howto_type howto_reloc_pcrel24 = | |
465 | HOWTO(PCREL24, 0, 2, 24, true, 0, complain_overflow_signed,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false); | |
466 | ||
467 | static reloc_howto_type howto_reloc_pcrel13 = | |
468 | HOWTO(PCREL13, 0, 2, 13, true, 0, complain_overflow_signed,0,"pcrel13", true, 0x00001fff,0x00001fff,false); | |
469 | ||
252b5132 RH |
470 | static reloc_howto_type howto_reloc_abs32codeshrunk = |
471 | HOWTO(ABS32CODE_SHRUNK, 0, 2, 24, true, 0, complain_overflow_signed, 0,"callx->callj", true, 0x00ffffff, 0x00ffffff,false); | |
472 | ||
473 | static reloc_howto_type howto_reloc_abs32code = | |
474 | HOWTO(ABS32CODE, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"callx", true, 0xffffffff,0xffffffff,false); | |
475 | ||
476 | static reloc_howto_type howto_align_table[] = { | |
477 | HOWTO (ALIGNER, 0, 0x1, 0, false, 0, complain_overflow_dont, 0, "align16", false, 0, 0, false), | |
478 | HOWTO (ALIGNER, 0, 0x3, 0, false, 0, complain_overflow_dont, 0, "align32", false, 0, 0, false), | |
479 | HOWTO (ALIGNER, 0, 0x7, 0, false, 0, complain_overflow_dont, 0, "align64", false, 0, 0, false), | |
480 | HOWTO (ALIGNER, 0, 0xf, 0, false, 0, complain_overflow_dont, 0, "align128", false, 0, 0, false), | |
481 | }; | |
482 | ||
483 | static reloc_howto_type howto_done_align_table[] = { | |
484 | HOWTO (ALIGNDONE, 0x1, 0x1, 0, false, 0, complain_overflow_dont, 0, "donealign16", false, 0, 0, false), | |
485 | HOWTO (ALIGNDONE, 0x3, 0x3, 0, false, 0, complain_overflow_dont, 0, "donealign32", false, 0, 0, false), | |
486 | HOWTO (ALIGNDONE, 0x7, 0x7, 0, false, 0, complain_overflow_dont, 0, "donealign64", false, 0, 0, false), | |
487 | HOWTO (ALIGNDONE, 0xf, 0xf, 0, false, 0, complain_overflow_dont, 0, "donealign128", false, 0, 0, false), | |
488 | }; | |
489 | ||
490 | static reloc_howto_type * | |
491 | b_out_bfd_reloc_type_lookup (abfd, code) | |
5f771d47 | 492 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
493 | bfd_reloc_code_real_type code; |
494 | { | |
495 | switch (code) | |
496 | { | |
497 | default: | |
498 | return 0; | |
499 | case BFD_RELOC_I960_CALLJ: | |
500 | return &howto_reloc_callj; | |
501 | case BFD_RELOC_32: | |
502 | case BFD_RELOC_CTOR: | |
503 | return &howto_reloc_abs32; | |
504 | case BFD_RELOC_24_PCREL: | |
505 | return &howto_reloc_pcrel24; | |
506 | } | |
507 | } | |
508 | ||
509 | /* Allocate enough room for all the reloc entries, plus pointers to them all */ | |
510 | ||
511 | static boolean | |
512 | b_out_slurp_reloc_table (abfd, asect, symbols) | |
513 | bfd *abfd; | |
514 | sec_ptr asect; | |
515 | asymbol **symbols; | |
516 | { | |
517 | register struct relocation_info *rptr; | |
518 | unsigned int counter ; | |
519 | arelent *cache_ptr ; | |
520 | int extern_mask, pcrel_mask, callj_mask, length_shift; | |
521 | int incode_mask; | |
522 | int size_mask; | |
523 | bfd_vma prev_addr = 0; | |
524 | unsigned int count; | |
525 | size_t reloc_size; | |
526 | struct relocation_info *relocs; | |
527 | arelent *reloc_cache; | |
528 | ||
529 | if (asect->relocation) | |
530 | return true; | |
531 | if (!aout_32_slurp_symbol_table (abfd)) | |
532 | return false; | |
533 | ||
534 | if (asect == obj_datasec (abfd)) { | |
535 | reloc_size = exec_hdr(abfd)->a_drsize; | |
536 | goto doit; | |
537 | } | |
538 | ||
539 | if (asect == obj_textsec (abfd)) { | |
540 | reloc_size = exec_hdr(abfd)->a_trsize; | |
541 | goto doit; | |
542 | } | |
543 | ||
544 | if (asect == obj_bsssec (abfd)) { | |
545 | reloc_size = 0; | |
546 | goto doit; | |
547 | } | |
548 | ||
549 | bfd_set_error (bfd_error_invalid_operation); | |
550 | return false; | |
551 | ||
552 | doit: | |
eb6e10cb | 553 | if (bfd_seek (abfd, (file_ptr) (asect->rel_filepos), SEEK_SET) != 0) |
252b5132 RH |
554 | return false; |
555 | count = reloc_size / sizeof (struct relocation_info); | |
556 | ||
557 | relocs = (struct relocation_info *) bfd_malloc (reloc_size); | |
558 | if (!relocs && reloc_size != 0) | |
559 | return false; | |
560 | reloc_cache = (arelent *) bfd_malloc ((count+1) * sizeof (arelent)); | |
561 | if (!reloc_cache) { | |
562 | if (relocs != NULL) | |
563 | free ((char*)relocs); | |
564 | return false; | |
565 | } | |
566 | ||
567 | if (bfd_read ((PTR) relocs, 1, reloc_size, abfd) != reloc_size) { | |
568 | free (reloc_cache); | |
569 | if (relocs != NULL) | |
570 | free (relocs); | |
571 | return false; | |
572 | } | |
573 | ||
252b5132 RH |
574 | if (bfd_header_big_endian (abfd)) { |
575 | /* big-endian bit field allocation order */ | |
576 | pcrel_mask = 0x80; | |
577 | extern_mask = 0x10; | |
578 | incode_mask = 0x08; | |
579 | callj_mask = 0x02; | |
580 | size_mask = 0x20; | |
581 | length_shift = 5; | |
582 | } else { | |
583 | /* little-endian bit field allocation order */ | |
584 | pcrel_mask = 0x01; | |
585 | extern_mask = 0x08; | |
586 | incode_mask = 0x10; | |
587 | callj_mask = 0x40; | |
588 | size_mask = 0x02; | |
589 | length_shift = 1; | |
590 | } | |
591 | ||
592 | for (rptr = relocs, cache_ptr = reloc_cache, counter = 0; | |
593 | counter < count; | |
594 | counter++, rptr++, cache_ptr++) | |
595 | { | |
596 | unsigned char *raw = (unsigned char *)rptr; | |
597 | unsigned int symnum; | |
598 | cache_ptr->address = bfd_h_get_32 (abfd, raw + 0); | |
599 | cache_ptr->howto = 0; | |
600 | if (bfd_header_big_endian (abfd)) | |
601 | { | |
602 | symnum = (raw[4] << 16) | (raw[5] << 8) | raw[6]; | |
603 | } | |
604 | else | |
605 | { | |
606 | symnum = (raw[6] << 16) | (raw[5] << 8) | raw[4]; | |
607 | } | |
608 | ||
609 | if (raw[7] & extern_mask) | |
610 | { | |
611 | /* if this is set then the r_index is a index into the symbol table; | |
612 | * if the bit is not set then r_index contains a section map. | |
613 | * we either fill in the sym entry with a pointer to the symbol, | |
614 | * or point to the correct section | |
615 | */ | |
616 | cache_ptr->sym_ptr_ptr = symbols + symnum; | |
617 | cache_ptr->addend = 0; | |
618 | } else | |
619 | { | |
620 | /* in a.out symbols are relative to the beginning of the | |
621 | * file rather than sections ? | |
622 | * (look in translate_from_native_sym_flags) | |
623 | * the reloc entry addend has added to it the offset into the | |
624 | * file of the data, so subtract the base to make the reloc | |
625 | * section relative */ | |
626 | int s; | |
627 | { | |
628 | /* sign-extend symnum from 24 bits to whatever host uses */ | |
629 | s = symnum; | |
630 | if (s & (1 << 23)) | |
631 | s |= (~0) << 24; | |
632 | } | |
633 | cache_ptr->sym_ptr_ptr = (asymbol **)NULL; | |
634 | switch (s) | |
635 | { | |
636 | case N_TEXT: | |
637 | case N_TEXT | N_EXT: | |
638 | cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; | |
639 | cache_ptr->addend = - obj_textsec(abfd)->vma; | |
640 | break; | |
641 | case N_DATA: | |
642 | case N_DATA | N_EXT: | |
643 | cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; | |
644 | cache_ptr->addend = - obj_datasec(abfd)->vma; | |
645 | break; | |
646 | case N_BSS: | |
647 | case N_BSS | N_EXT: | |
648 | cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; | |
649 | cache_ptr->addend = - obj_bsssec(abfd)->vma; | |
650 | break; | |
651 | case N_ABS: | |
652 | case N_ABS | N_EXT: | |
653 | cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; | |
654 | cache_ptr->addend = 0; | |
655 | break; | |
656 | case -2: /* .align */ | |
657 | if (raw[7] & pcrel_mask) | |
658 | { | |
659 | cache_ptr->howto = &howto_align_table[(raw[7] >> length_shift) & 3]; | |
660 | cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
661 | } | |
662 | else | |
663 | { | |
664 | /* .org? */ | |
665 | abort (); | |
666 | } | |
667 | cache_ptr->addend = 0; | |
668 | break; | |
669 | default: | |
670 | BFD_ASSERT(0); | |
671 | break; | |
672 | } | |
673 | ||
674 | } | |
675 | ||
676 | /* the i960 only has a few relocation types: | |
677 | abs 32-bit and pcrel 24bit. except for callj's! */ | |
678 | if (cache_ptr->howto != 0) | |
679 | ; | |
680 | else if (raw[7] & callj_mask) | |
681 | { | |
682 | cache_ptr->howto = &howto_reloc_callj; | |
683 | } | |
684 | else if ( raw[7] & pcrel_mask) | |
685 | { | |
686 | if (raw[7] & size_mask) | |
687 | cache_ptr->howto = &howto_reloc_pcrel13; | |
688 | else | |
689 | cache_ptr->howto = &howto_reloc_pcrel24; | |
690 | } | |
691 | else | |
692 | { | |
693 | if (raw[7] & incode_mask) | |
694 | { | |
695 | cache_ptr->howto = &howto_reloc_abs32code; | |
696 | } | |
697 | else | |
698 | { | |
699 | cache_ptr->howto = &howto_reloc_abs32; | |
700 | } | |
701 | } | |
702 | if (cache_ptr->address < prev_addr) | |
703 | { | |
704 | /* Ouch! this reloc is out of order, insert into the right place | |
705 | */ | |
706 | arelent tmp; | |
707 | arelent *cursor = cache_ptr-1; | |
708 | bfd_vma stop = cache_ptr->address; | |
709 | tmp = *cache_ptr; | |
710 | while (cursor->address > stop && cursor >= reloc_cache) | |
711 | { | |
712 | cursor[1] = cursor[0]; | |
713 | cursor--; | |
714 | } | |
715 | cursor[1] = tmp; | |
716 | } | |
717 | else | |
718 | { | |
719 | prev_addr = cache_ptr->address; | |
720 | } | |
721 | } | |
722 | ||
252b5132 RH |
723 | if (relocs != NULL) |
724 | free (relocs); | |
725 | asect->relocation = reloc_cache; | |
726 | asect->reloc_count = count; | |
727 | ||
252b5132 RH |
728 | return true; |
729 | } | |
730 | ||
252b5132 RH |
731 | static boolean |
732 | b_out_squirt_out_relocs (abfd, section) | |
733 | bfd *abfd; | |
734 | asection *section; | |
735 | { | |
736 | arelent **generic; | |
737 | int r_extern = 0; | |
738 | int r_idx; | |
739 | int incode_mask; | |
740 | int len_1; | |
741 | unsigned int count = section->reloc_count; | |
742 | struct relocation_info *native, *natptr; | |
743 | size_t natsize = count * sizeof (struct relocation_info); | |
744 | int extern_mask, pcrel_mask, len_2, callj_mask; | |
745 | if (count == 0) return true; | |
746 | generic = section->orelocation; | |
747 | native = ((struct relocation_info *) bfd_malloc (natsize)); | |
748 | if (!native && natsize != 0) | |
749 | return false; | |
750 | ||
751 | if (bfd_header_big_endian (abfd)) | |
752 | { | |
753 | /* Big-endian bit field allocation order */ | |
754 | pcrel_mask = 0x80; | |
755 | extern_mask = 0x10; | |
756 | len_2 = 0x40; | |
757 | len_1 = 0x20; | |
758 | callj_mask = 0x02; | |
759 | incode_mask = 0x08; | |
760 | } | |
761 | else | |
762 | { | |
763 | /* Little-endian bit field allocation order */ | |
764 | pcrel_mask = 0x01; | |
765 | extern_mask = 0x08; | |
766 | len_2 = 0x04; | |
767 | len_1 = 0x02; | |
768 | callj_mask = 0x40; | |
769 | incode_mask = 0x10; | |
770 | } | |
771 | ||
772 | for (natptr = native; count > 0; --count, ++natptr, ++generic) | |
773 | { | |
774 | arelent *g = *generic; | |
775 | unsigned char *raw = (unsigned char *)natptr; | |
776 | asymbol *sym = *(g->sym_ptr_ptr); | |
777 | ||
778 | asection *output_section = sym->section->output_section; | |
779 | ||
780 | bfd_h_put_32(abfd, g->address, raw); | |
781 | /* Find a type in the output format which matches the input howto - | |
782 | * at the moment we assume input format == output format FIXME!! | |
783 | */ | |
784 | r_idx = 0; | |
785 | /* FIXME: Need callj stuff here, and to check the howto entries to | |
786 | be sure they are real for this architecture. */ | |
787 | if (g->howto== &howto_reloc_callj) | |
788 | { | |
789 | raw[7] = callj_mask + pcrel_mask + len_2; | |
790 | } | |
791 | else if (g->howto == &howto_reloc_pcrel24) | |
792 | { | |
793 | raw[7] = pcrel_mask + len_2; | |
794 | } | |
795 | else if (g->howto == &howto_reloc_pcrel13) | |
796 | { | |
797 | raw[7] = pcrel_mask + len_1; | |
798 | } | |
799 | else if (g->howto == &howto_reloc_abs32code) | |
800 | { | |
801 | raw[7] = len_2 + incode_mask; | |
802 | } | |
803 | else if (g->howto >= howto_align_table | |
804 | && g->howto <= (howto_align_table | |
805 | + sizeof (howto_align_table) / sizeof (howto_align_table[0]) | |
806 | - 1)) | |
807 | { | |
808 | /* symnum == -2; extern_mask not set, pcrel_mask set */ | |
809 | r_idx = -2; | |
810 | r_extern = 0; | |
811 | raw[7] = (pcrel_mask | |
812 | | ((g->howto - howto_align_table) << 1)); | |
813 | } | |
814 | else { | |
815 | raw[7] = len_2; | |
816 | } | |
817 | ||
818 | if (r_idx != 0) | |
819 | /* already mucked with r_extern, r_idx */; | |
820 | else if (bfd_is_com_section (output_section) | |
821 | || bfd_is_abs_section (output_section) | |
822 | || bfd_is_und_section (output_section)) | |
823 | { | |
824 | ||
825 | if (bfd_abs_section_ptr->symbol == sym) | |
826 | { | |
827 | /* Whoops, looked like an abs symbol, but is really an offset | |
828 | from the abs section */ | |
829 | r_idx = 0; | |
830 | r_extern = 0; | |
831 | } | |
832 | else | |
833 | { | |
834 | /* Fill in symbol */ | |
835 | ||
836 | r_extern = 1; | |
837 | r_idx = (*g->sym_ptr_ptr)->udata.i; | |
838 | } | |
839 | } | |
840 | else | |
841 | { | |
842 | /* Just an ordinary section */ | |
843 | r_extern = 0; | |
844 | r_idx = output_section->target_index; | |
845 | } | |
846 | ||
847 | if (bfd_header_big_endian (abfd)) { | |
848 | raw[4] = (unsigned char) (r_idx >> 16); | |
849 | raw[5] = (unsigned char) (r_idx >> 8); | |
850 | raw[6] = (unsigned char) (r_idx ); | |
851 | } else { | |
852 | raw[6] = (unsigned char) (r_idx >> 16); | |
853 | raw[5] = (unsigned char) (r_idx>> 8); | |
854 | raw[4] = (unsigned char) (r_idx ); | |
855 | } | |
856 | if (r_extern) | |
857 | raw[7] |= extern_mask; | |
858 | } | |
859 | ||
860 | if (bfd_write ((PTR) native, 1, natsize, abfd) != natsize) { | |
861 | free((PTR)native); | |
862 | return false; | |
863 | } | |
864 | free ((PTR)native); | |
865 | ||
866 | return true; | |
867 | } | |
868 | ||
869 | /* This is stupid. This function should be a boolean predicate */ | |
870 | static long | |
871 | b_out_canonicalize_reloc (abfd, section, relptr, symbols) | |
872 | bfd *abfd; | |
873 | sec_ptr section; | |
874 | arelent **relptr; | |
875 | asymbol **symbols; | |
876 | { | |
877 | arelent *tblptr; | |
878 | unsigned int count; | |
879 | ||
880 | if ((section->flags & SEC_CONSTRUCTOR) != 0) | |
881 | { | |
882 | arelent_chain *chain = section->constructor_chain; | |
883 | for (count = 0; count < section->reloc_count; count++) | |
884 | { | |
885 | *relptr++ = &chain->relent; | |
886 | chain = chain->next; | |
887 | } | |
888 | } | |
889 | else | |
890 | { | |
891 | if (section->relocation == NULL | |
892 | && ! b_out_slurp_reloc_table (abfd, section, symbols)) | |
893 | return -1; | |
894 | ||
895 | tblptr = section->relocation; | |
896 | for (count = 0; count++ < section->reloc_count;) | |
897 | *relptr++ = tblptr++; | |
898 | } | |
899 | ||
900 | *relptr = NULL; | |
901 | ||
902 | return section->reloc_count; | |
903 | } | |
904 | ||
905 | static long | |
906 | b_out_get_reloc_upper_bound (abfd, asect) | |
907 | bfd *abfd; | |
908 | sec_ptr asect; | |
909 | { | |
910 | if (bfd_get_format (abfd) != bfd_object) { | |
911 | bfd_set_error (bfd_error_invalid_operation); | |
912 | return -1; | |
913 | } | |
914 | ||
915 | if (asect->flags & SEC_CONSTRUCTOR) | |
916 | return sizeof (arelent *) * (asect->reloc_count + 1); | |
917 | ||
918 | if (asect == obj_datasec (abfd)) | |
919 | return (sizeof (arelent *) * | |
920 | ((exec_hdr(abfd)->a_drsize / sizeof (struct relocation_info)) | |
921 | +1)); | |
922 | ||
923 | if (asect == obj_textsec (abfd)) | |
924 | return (sizeof (arelent *) * | |
925 | ((exec_hdr(abfd)->a_trsize / sizeof (struct relocation_info)) | |
926 | +1)); | |
927 | ||
928 | if (asect == obj_bsssec (abfd)) | |
929 | return 0; | |
930 | ||
931 | bfd_set_error (bfd_error_invalid_operation); | |
932 | return -1; | |
933 | } | |
934 | \f | |
935 | static boolean | |
936 | b_out_set_section_contents (abfd, section, location, offset, count) | |
937 | bfd *abfd; | |
938 | asection *section; | |
939 | PTR location; | |
940 | file_ptr offset; | |
941 | bfd_size_type count; | |
942 | { | |
943 | ||
944 | if (abfd->output_has_begun == false) { /* set by bfd.c handler */ | |
945 | if (! aout_32_make_sections (abfd)) | |
946 | return false; | |
947 | ||
eb6e10cb | 948 | obj_textsec (abfd)->filepos = sizeof (struct internal_exec); |
252b5132 RH |
949 | obj_datasec(abfd)->filepos = obj_textsec(abfd)->filepos |
950 | + obj_textsec (abfd)->_raw_size; | |
951 | ||
952 | } | |
953 | /* regardless, once we know what we're doing, we might as well get going */ | |
954 | if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0) | |
955 | return false; | |
956 | ||
957 | if (count != 0) { | |
958 | return (bfd_write ((PTR)location, 1, count, abfd) == count) ?true:false; | |
959 | } | |
960 | return true; | |
961 | } | |
962 | ||
963 | static boolean | |
964 | b_out_set_arch_mach (abfd, arch, machine) | |
965 | bfd *abfd; | |
966 | enum bfd_architecture arch; | |
967 | unsigned long machine; | |
968 | { | |
969 | bfd_default_set_arch_mach(abfd, arch, machine); | |
970 | ||
971 | if (arch == bfd_arch_unknown) /* Unknown machine arch is OK */ | |
972 | return true; | |
973 | if (arch == bfd_arch_i960) /* i960 default is OK */ | |
974 | switch (machine) { | |
975 | case bfd_mach_i960_core: | |
976 | case bfd_mach_i960_kb_sb: | |
977 | case bfd_mach_i960_mc: | |
978 | case bfd_mach_i960_xa: | |
979 | case bfd_mach_i960_ca: | |
980 | case bfd_mach_i960_ka_sa: | |
981 | case bfd_mach_i960_jx: | |
982 | case bfd_mach_i960_hx: | |
983 | case 0: | |
984 | return true; | |
985 | default: | |
986 | return false; | |
987 | } | |
988 | ||
989 | return false; | |
990 | } | |
991 | ||
992 | static int | |
993 | b_out_sizeof_headers (ignore_abfd, ignore) | |
5f771d47 ILT |
994 | bfd *ignore_abfd ATTRIBUTE_UNUSED; |
995 | boolean ignore ATTRIBUTE_UNUSED; | |
252b5132 | 996 | { |
eb6e10cb | 997 | return sizeof (struct internal_exec); |
252b5132 RH |
998 | } |
999 | ||
252b5132 RH |
1000 | /************************************************************************/ |
1001 | static bfd_vma | |
1002 | get_value (reloc, link_info, input_section) | |
1003 | arelent *reloc; | |
1004 | struct bfd_link_info *link_info; | |
1005 | asection *input_section; | |
1006 | { | |
1007 | bfd_vma value; | |
1008 | asymbol *symbol = *(reloc->sym_ptr_ptr); | |
1009 | ||
1010 | /* A symbol holds a pointer to a section, and an offset from the | |
1011 | base of the section. To relocate, we find where the section will | |
1012 | live in the output and add that in */ | |
1013 | ||
1014 | if (bfd_is_und_section (symbol->section)) | |
1015 | { | |
1016 | struct bfd_link_hash_entry *h; | |
1017 | ||
1018 | /* The symbol is undefined in this BFD. Look it up in the | |
1019 | global linker hash table. FIXME: This should be changed when | |
1020 | we convert b.out to use a specific final_link function and | |
1021 | change the interface to bfd_relax_section to not require the | |
1022 | generic symbols. */ | |
1023 | h = bfd_wrapped_link_hash_lookup (input_section->owner, link_info, | |
1024 | bfd_asymbol_name (symbol), | |
1025 | false, false, true); | |
1026 | if (h != (struct bfd_link_hash_entry *) NULL | |
1027 | && (h->type == bfd_link_hash_defined | |
1028 | || h->type == bfd_link_hash_defweak)) | |
1029 | value = h->u.def.value + output_addr (h->u.def.section); | |
1030 | else if (h != (struct bfd_link_hash_entry *) NULL | |
1031 | && h->type == bfd_link_hash_common) | |
1032 | value = h->u.c.size; | |
1033 | else | |
1034 | { | |
1035 | if (! ((*link_info->callbacks->undefined_symbol) | |
1036 | (link_info, bfd_asymbol_name (symbol), | |
5cc7c785 L |
1037 | input_section->owner, input_section, reloc->address, |
1038 | true))) | |
252b5132 RH |
1039 | abort (); |
1040 | value = 0; | |
1041 | } | |
1042 | } | |
1043 | else | |
1044 | { | |
1045 | value = symbol->value + output_addr (symbol->section); | |
1046 | } | |
1047 | ||
1048 | /* Add the value contained in the relocation */ | |
1049 | value += reloc->addend; | |
1050 | ||
1051 | return value; | |
1052 | } | |
1053 | ||
1054 | static void | |
1055 | perform_slip (abfd, slip, input_section, value) | |
1056 | bfd *abfd; | |
1057 | unsigned int slip; | |
1058 | asection *input_section; | |
1059 | bfd_vma value; | |
1060 | { | |
1061 | asymbol **s; | |
1062 | ||
1063 | s = _bfd_generic_link_get_symbols (abfd); | |
1064 | BFD_ASSERT (s != (asymbol **) NULL); | |
1065 | ||
1066 | /* Find all symbols past this point, and make them know | |
1067 | what's happened */ | |
1068 | while (*s) | |
1069 | { | |
1070 | asymbol *p = *s; | |
1071 | if (p->section == input_section) | |
1072 | { | |
1073 | /* This was pointing into this section, so mangle it */ | |
1074 | if (p->value > value) | |
1075 | { | |
1076 | p->value -=slip; | |
1077 | if (p->udata.p != NULL) | |
1078 | { | |
1079 | struct generic_link_hash_entry *h; | |
1080 | ||
1081 | h = (struct generic_link_hash_entry *) p->udata.p; | |
1082 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); | |
1083 | h->root.u.def.value -= slip; | |
1084 | BFD_ASSERT (h->root.u.def.value == p->value); | |
1085 | } | |
1086 | } | |
1087 | } | |
1088 | s++; | |
1089 | ||
1090 | } | |
1091 | } | |
1092 | ||
1093 | /* This routine works out if the thing we want to get to can be | |
1094 | reached with a 24bit offset instead of a 32 bit one. | |
1095 | If it can, then it changes the amode */ | |
1096 | ||
1097 | static int | |
1098 | abs32code (abfd, input_section, r, shrink, link_info) | |
1099 | bfd *abfd; | |
1100 | asection *input_section; | |
1101 | arelent *r; | |
1102 | unsigned int shrink; | |
1103 | struct bfd_link_info *link_info; | |
1104 | { | |
1105 | bfd_vma value = get_value (r, link_info, input_section); | |
1106 | bfd_vma dot = output_addr (input_section) + r->address; | |
1107 | bfd_vma gap; | |
1108 | ||
1109 | /* See if the address we're looking at within 2^23 bytes of where | |
1110 | we are, if so then we can use a small branch rather than the | |
1111 | jump we were going to */ | |
1112 | ||
1113 | gap = value - (dot - shrink); | |
1114 | ||
252b5132 RH |
1115 | if (-1<<23 < (long)gap && (long)gap < 1<<23 ) |
1116 | { | |
1117 | /* Change the reloc type from 32bitcode possible 24, to 24bit | |
1118 | possible 32 */ | |
1119 | ||
1120 | r->howto = &howto_reloc_abs32codeshrunk; | |
1121 | /* The place to relc moves back by four bytes */ | |
1122 | r->address -=4; | |
1123 | ||
1124 | /* This will be four bytes smaller in the long run */ | |
1125 | shrink += 4 ; | |
1126 | perform_slip (abfd, 4, input_section, r->address-shrink + 4); | |
1127 | } | |
1128 | return shrink; | |
1129 | } | |
1130 | ||
1131 | static int | |
1132 | aligncode (abfd, input_section, r, shrink) | |
1133 | bfd *abfd; | |
1134 | asection *input_section; | |
1135 | arelent *r; | |
1136 | unsigned int shrink; | |
1137 | { | |
1138 | bfd_vma dot = output_addr (input_section) + r->address; | |
1139 | bfd_vma gap; | |
1140 | bfd_vma old_end; | |
1141 | bfd_vma new_end; | |
1142 | int shrink_delta; | |
1143 | int size = r->howto->size; | |
1144 | ||
1145 | /* Reduce the size of the alignment so that it's still aligned but | |
1146 | smaller - the current size is already the same size as or bigger | |
1147 | than the alignment required. */ | |
1148 | ||
1149 | /* calculate the first byte following the padding before we optimize */ | |
1150 | old_end = ((dot + size ) & ~size) + size+1; | |
1151 | /* work out where the new end will be - remember that we're smaller | |
1152 | than we used to be */ | |
1153 | new_end = ((dot - shrink + size) & ~size); | |
1154 | ||
1155 | /* This is the new end */ | |
1156 | gap = old_end - ((dot + size) & ~size); | |
1157 | ||
1158 | shrink_delta = (old_end - new_end) - shrink; | |
1159 | ||
1160 | if (shrink_delta) | |
1161 | { | |
1162 | /* Change the reloc so that it knows how far to align to */ | |
1163 | r->howto = howto_done_align_table + (r->howto - howto_align_table); | |
1164 | ||
1165 | /* Encode the stuff into the addend - for future use we need to | |
1166 | know how big the reloc used to be */ | |
1167 | r->addend = old_end - dot + r->address; | |
1168 | ||
1169 | /* This will be N bytes smaller in the long run, adjust all the symbols */ | |
1170 | perform_slip (abfd, shrink_delta, input_section, r->address - shrink); | |
1171 | shrink += shrink_delta; | |
1172 | } | |
1173 | return shrink; | |
1174 | } | |
1175 | ||
1176 | static boolean | |
1177 | b_out_bfd_relax_section (abfd, i, link_info, again) | |
1178 | bfd *abfd; | |
1179 | asection *i; | |
1180 | struct bfd_link_info *link_info; | |
1181 | boolean *again; | |
1182 | { | |
1183 | /* Get enough memory to hold the stuff */ | |
1184 | bfd *input_bfd = i->owner; | |
1185 | asection *input_section = i; | |
1186 | int shrink = 0 ; | |
1187 | arelent **reloc_vector = NULL; | |
1188 | long reloc_size = bfd_get_reloc_upper_bound(input_bfd, | |
1189 | input_section); | |
1190 | ||
1191 | if (reloc_size < 0) | |
1192 | return false; | |
1193 | ||
1194 | /* We only run this relaxation once. It might work to run it | |
1195 | multiple times, but it hasn't been tested. */ | |
1196 | *again = false; | |
1197 | ||
1198 | if (reloc_size) | |
1199 | { | |
1200 | long reloc_count; | |
1201 | ||
1202 | reloc_vector = (arelent **) bfd_malloc (reloc_size); | |
1203 | if (reloc_vector == NULL && reloc_size != 0) | |
1204 | goto error_return; | |
1205 | ||
1206 | /* Get the relocs and think about them */ | |
1207 | reloc_count = | |
1208 | bfd_canonicalize_reloc (input_bfd, input_section, reloc_vector, | |
1209 | _bfd_generic_link_get_symbols (input_bfd)); | |
1210 | if (reloc_count < 0) | |
1211 | goto error_return; | |
1212 | if (reloc_count > 0) | |
1213 | { | |
1214 | arelent **parent; | |
1215 | for (parent = reloc_vector; *parent; parent++) | |
1216 | { | |
1217 | arelent *r = *parent; | |
1218 | switch (r->howto->type) | |
1219 | { | |
1220 | case ALIGNER: | |
1221 | /* An alignment reloc */ | |
1222 | shrink = aligncode (abfd, input_section, r, shrink); | |
1223 | break; | |
1224 | case ABS32CODE: | |
1225 | /* A 32bit reloc in an addressing mode */ | |
1226 | shrink = abs32code (input_bfd, input_section, r, shrink, | |
1227 | link_info); | |
1228 | break; | |
1229 | case ABS32CODE_SHRUNK: | |
1230 | shrink+=4; | |
1231 | break; | |
1232 | } | |
1233 | } | |
1234 | } | |
1235 | } | |
1236 | input_section->_cooked_size = input_section->_raw_size - shrink; | |
1237 | ||
1238 | if (reloc_vector != NULL) | |
1239 | free (reloc_vector); | |
1240 | return true; | |
1241 | error_return: | |
1242 | if (reloc_vector != NULL) | |
1243 | free (reloc_vector); | |
1244 | return false; | |
1245 | } | |
1246 | ||
1247 | static bfd_byte * | |
1248 | b_out_bfd_get_relocated_section_contents (output_bfd, link_info, link_order, | |
1249 | data, relocateable, symbols) | |
1250 | bfd *output_bfd; | |
1251 | struct bfd_link_info *link_info; | |
1252 | struct bfd_link_order *link_order; | |
1253 | bfd_byte *data; | |
1254 | boolean relocateable; | |
1255 | asymbol **symbols; | |
1256 | { | |
1257 | /* Get enough memory to hold the stuff */ | |
1258 | bfd *input_bfd = link_order->u.indirect.section->owner; | |
1259 | asection *input_section = link_order->u.indirect.section; | |
1260 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, | |
1261 | input_section); | |
1262 | arelent **reloc_vector = NULL; | |
1263 | long reloc_count; | |
1264 | ||
1265 | if (reloc_size < 0) | |
1266 | goto error_return; | |
1267 | ||
1268 | /* If producing relocateable output, don't bother to relax. */ | |
1269 | if (relocateable) | |
1270 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
1271 | link_order, | |
1272 | data, relocateable, | |
1273 | symbols); | |
1274 | ||
1275 | reloc_vector = (arelent **) bfd_malloc (reloc_size); | |
1276 | if (reloc_vector == NULL && reloc_size != 0) | |
1277 | goto error_return; | |
1278 | ||
1279 | input_section->reloc_done = 1; | |
1280 | ||
1281 | /* read in the section */ | |
1282 | BFD_ASSERT (true == bfd_get_section_contents (input_bfd, | |
1283 | input_section, | |
1284 | data, | |
1285 | 0, | |
1286 | input_section->_raw_size)); | |
1287 | ||
1288 | reloc_count = bfd_canonicalize_reloc (input_bfd, | |
1289 | input_section, | |
1290 | reloc_vector, | |
1291 | symbols); | |
1292 | if (reloc_count < 0) | |
1293 | goto error_return; | |
1294 | if (reloc_count > 0) | |
1295 | { | |
1296 | arelent **parent = reloc_vector; | |
1297 | arelent *reloc ; | |
1298 | ||
1299 | unsigned int dst_address = 0; | |
1300 | unsigned int src_address = 0; | |
1301 | unsigned int run; | |
1302 | unsigned int idx; | |
1303 | ||
1304 | /* Find how long a run we can do */ | |
1305 | while (dst_address < link_order->size) | |
1306 | { | |
1307 | reloc = *parent; | |
1308 | if (reloc) | |
1309 | { | |
1310 | /* Note that the relaxing didn't tie up the addresses in the | |
1311 | relocation, so we use the original address to work out the | |
1312 | run of non-relocated data */ | |
1313 | BFD_ASSERT (reloc->address >= src_address); | |
1314 | run = reloc->address - src_address; | |
1315 | parent++; | |
1316 | } | |
1317 | else | |
1318 | { | |
1319 | run = link_order->size - dst_address; | |
1320 | } | |
1321 | /* Copy the bytes */ | |
1322 | for (idx = 0; idx < run; idx++) | |
1323 | { | |
1324 | data[dst_address++] = data[src_address++]; | |
1325 | } | |
1326 | ||
1327 | /* Now do the relocation */ | |
1328 | ||
1329 | if (reloc) | |
1330 | { | |
1331 | switch (reloc->howto->type) | |
1332 | { | |
1333 | case ABS32CODE: | |
1334 | calljx_callback (input_bfd, link_info, reloc, | |
1335 | src_address + data, dst_address + data, | |
1336 | input_section); | |
1337 | src_address+=4; | |
1338 | dst_address+=4; | |
1339 | break; | |
1340 | case ABS32: | |
1341 | bfd_put_32 (input_bfd, | |
1342 | (bfd_get_32 (input_bfd, data + src_address) | |
1343 | + get_value (reloc, link_info, input_section)), | |
1344 | data + dst_address); | |
1345 | src_address+=4; | |
1346 | dst_address+=4; | |
1347 | break; | |
1348 | case CALLJ: | |
1349 | callj_callback (input_bfd, link_info, reloc, data, | |
1350 | src_address, dst_address, input_section, | |
1351 | false); | |
1352 | src_address+=4; | |
1353 | dst_address+=4; | |
1354 | break; | |
1355 | case ALIGNDONE: | |
1356 | BFD_ASSERT (reloc->addend >= src_address); | |
1357 | BFD_ASSERT (reloc->addend <= input_section->_raw_size); | |
1358 | src_address = reloc->addend; | |
1359 | dst_address = ((dst_address + reloc->howto->size) | |
1360 | & ~reloc->howto->size); | |
1361 | break; | |
1362 | case ABS32CODE_SHRUNK: | |
1363 | /* This used to be a callx, but we've found out that a | |
1364 | callj will reach, so do the right thing. */ | |
1365 | callj_callback (input_bfd, link_info, reloc, data, | |
1366 | src_address + 4, dst_address, input_section, | |
1367 | true); | |
1368 | dst_address+=4; | |
1369 | src_address+=8; | |
1370 | break; | |
1371 | case PCREL24: | |
1372 | { | |
1373 | long int word = bfd_get_32 (input_bfd, | |
1374 | data + src_address); | |
1375 | bfd_vma value; | |
1376 | ||
1377 | value = get_value (reloc, link_info, input_section); | |
1378 | word = ((word & ~BAL_MASK) | |
1379 | | (((word & BAL_MASK) | |
1380 | + value | |
1381 | - output_addr (input_section) | |
1382 | + reloc->addend) | |
1383 | & BAL_MASK)); | |
1384 | ||
1385 | bfd_put_32 (input_bfd, word, data + dst_address); | |
1386 | dst_address+=4; | |
1387 | src_address+=4; | |
1388 | ||
1389 | } | |
1390 | break; | |
1391 | ||
1392 | case PCREL13: | |
1393 | { | |
1394 | long int word = bfd_get_32 (input_bfd, | |
1395 | data + src_address); | |
1396 | bfd_vma value; | |
1397 | ||
1398 | value = get_value (reloc, link_info, input_section); | |
1399 | word = ((word & ~PCREL13_MASK) | |
1400 | | (((word & PCREL13_MASK) | |
1401 | + value | |
1402 | + reloc->addend | |
1403 | - output_addr (input_section)) | |
1404 | & PCREL13_MASK)); | |
1405 | ||
1406 | bfd_put_32 (input_bfd, word, data + dst_address); | |
1407 | dst_address+=4; | |
1408 | src_address+=4; | |
1409 | ||
1410 | } | |
1411 | break; | |
1412 | ||
1413 | default: | |
eb6e10cb | 1414 | abort (); |
252b5132 RH |
1415 | } |
1416 | } | |
1417 | } | |
1418 | } | |
1419 | if (reloc_vector != NULL) | |
1420 | free (reloc_vector); | |
1421 | return data; | |
1422 | error_return: | |
1423 | if (reloc_vector != NULL) | |
1424 | free (reloc_vector); | |
1425 | return NULL; | |
1426 | } | |
1427 | /***********************************************************************/ | |
1428 | ||
1429 | /* Build the transfer vectors for Big and Little-Endian B.OUT files. */ | |
1430 | ||
1431 | #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol | |
1432 | #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info | |
1433 | ||
1434 | #define b_out_bfd_link_hash_table_create _bfd_generic_link_hash_table_create | |
1435 | #define b_out_bfd_link_add_symbols _bfd_generic_link_add_symbols | |
1436 | #define b_out_bfd_final_link _bfd_generic_final_link | |
1437 | #define b_out_bfd_link_split_section _bfd_generic_link_split_section | |
1438 | #define b_out_bfd_gc_sections bfd_generic_gc_sections | |
8550eb6e | 1439 | #define b_out_bfd_merge_sections bfd_generic_merge_sections |
252b5132 RH |
1440 | |
1441 | #define aout_32_get_section_contents_in_window \ | |
1442 | _bfd_generic_get_section_contents_in_window | |
1443 | ||
c3c89269 NC |
1444 | extern const bfd_target b_out_vec_little_host; |
1445 | ||
252b5132 RH |
1446 | const bfd_target b_out_vec_big_host = |
1447 | { | |
1448 | "b.out.big", /* name */ | |
1449 | bfd_target_aout_flavour, | |
1450 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
1451 | BFD_ENDIAN_BIG, /* hdr byte order is big */ | |
1452 | (HAS_RELOC | EXEC_P | /* object flags */ | |
1453 | HAS_LINENO | HAS_DEBUG | | |
1454 | HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ), | |
1455 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), | |
1456 | '_', /* symbol leading char */ | |
1457 | ' ', /* ar_pad_char */ | |
1458 | 16, /* ar_max_namelen */ | |
1459 | ||
1460 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
1461 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
1462 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
1463 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
1464 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
1465 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ | |
1466 | {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */ | |
1467 | bfd_generic_archive_p, _bfd_dummy_target}, | |
1468 | {bfd_false, b_out_mkobject, /* bfd_set_format */ | |
1469 | _bfd_generic_mkarchive, bfd_false}, | |
1470 | {bfd_false, b_out_write_object_contents, /* bfd_write_contents */ | |
1471 | _bfd_write_archive_contents, bfd_false}, | |
1472 | ||
1473 | BFD_JUMP_TABLE_GENERIC (aout_32), | |
1474 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
1475 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
1476 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), | |
1477 | BFD_JUMP_TABLE_SYMBOLS (aout_32), | |
1478 | BFD_JUMP_TABLE_RELOCS (b_out), | |
1479 | BFD_JUMP_TABLE_WRITE (b_out), | |
1480 | BFD_JUMP_TABLE_LINK (b_out), | |
1481 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
1482 | ||
c3c89269 | 1483 | & b_out_vec_little_host, |
aebad5fe | 1484 | |
252b5132 RH |
1485 | (PTR) 0, |
1486 | }; | |
1487 | ||
252b5132 RH |
1488 | const bfd_target b_out_vec_little_host = |
1489 | { | |
1490 | "b.out.little", /* name */ | |
1491 | bfd_target_aout_flavour, | |
1492 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
1493 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
1494 | (HAS_RELOC | EXEC_P | /* object flags */ | |
1495 | HAS_LINENO | HAS_DEBUG | | |
1496 | HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ), | |
1497 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), | |
1498 | '_', /* symbol leading char */ | |
1499 | ' ', /* ar_pad_char */ | |
1500 | 16, /* ar_max_namelen */ | |
1501 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
1502 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
1503 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
1504 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
1505 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
1506 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
1507 | ||
1508 | {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */ | |
1509 | bfd_generic_archive_p, _bfd_dummy_target}, | |
1510 | {bfd_false, b_out_mkobject, /* bfd_set_format */ | |
1511 | _bfd_generic_mkarchive, bfd_false}, | |
1512 | {bfd_false, b_out_write_object_contents, /* bfd_write_contents */ | |
1513 | _bfd_write_archive_contents, bfd_false}, | |
1514 | ||
1515 | BFD_JUMP_TABLE_GENERIC (aout_32), | |
1516 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
1517 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
1518 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), | |
1519 | BFD_JUMP_TABLE_SYMBOLS (aout_32), | |
1520 | BFD_JUMP_TABLE_RELOCS (b_out), | |
1521 | BFD_JUMP_TABLE_WRITE (b_out), | |
1522 | BFD_JUMP_TABLE_LINK (b_out), | |
1523 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
1524 | ||
c3c89269 | 1525 | & b_out_vec_big_host, |
aebad5fe | 1526 | |
252b5132 RH |
1527 | (PTR) 0 |
1528 | }; |