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252b5132 RH |
1 | /* BFD back-end for Hitachi H8/300 COFF binaries. |
2 | Copyright 1990, 91, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc. | |
3 | Written by Steve Chamberlain, <sac@cygnus.com>. | |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "libbfd.h" | |
24 | #include "bfdlink.h" | |
25 | #include "genlink.h" | |
26 | #include "coff/h8300.h" | |
27 | #include "coff/internal.h" | |
28 | #include "libcoff.h" | |
29 | ||
30 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1) | |
31 | ||
32 | /* We derive a hash table from the basic BFD hash table to | |
33 | hold entries in the function vector. Aside from the | |
34 | info stored by the basic hash table, we need the offset | |
35 | of a particular entry within the hash table as well as | |
36 | the offset where we'll add the next entry. */ | |
37 | ||
38 | struct funcvec_hash_entry | |
39 | { | |
40 | /* The basic hash table entry. */ | |
41 | struct bfd_hash_entry root; | |
42 | ||
43 | /* The offset within the vectors section where | |
44 | this entry lives. */ | |
45 | bfd_vma offset; | |
46 | }; | |
47 | ||
48 | struct funcvec_hash_table | |
49 | { | |
50 | /* The basic hash table. */ | |
51 | struct bfd_hash_table root; | |
52 | ||
53 | bfd *abfd; | |
54 | ||
55 | /* Offset at which we'll add the next entry. */ | |
56 | unsigned int offset; | |
57 | }; | |
58 | ||
59 | static struct bfd_hash_entry * | |
60 | funcvec_hash_newfunc | |
61 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
62 | ||
63 | static boolean | |
64 | funcvec_hash_table_init | |
65 | PARAMS ((struct funcvec_hash_table *, bfd *, | |
66 | struct bfd_hash_entry *(*) PARAMS ((struct bfd_hash_entry *, | |
67 | struct bfd_hash_table *, | |
68 | const char *)))); | |
69 | ||
70 | /* To lookup a value in the function vector hash table. */ | |
71 | #define funcvec_hash_lookup(table, string, create, copy) \ | |
72 | ((struct funcvec_hash_entry *) \ | |
73 | bfd_hash_lookup (&(table)->root, (string), (create), (copy))) | |
74 | ||
75 | /* The derived h8300 COFF linker table. Note it's derived from | |
76 | the generic linker hash table, not the COFF backend linker hash | |
77 | table! We use this to attach additional data structures we | |
78 | need while linking on the h8300. */ | |
79 | struct h8300_coff_link_hash_table | |
80 | { | |
81 | /* The main hash table. */ | |
82 | struct generic_link_hash_table root; | |
83 | ||
84 | /* Section for the vectors table. This gets attached to a | |
85 | random input bfd, we keep it here for easy access. */ | |
86 | asection *vectors_sec; | |
87 | ||
88 | /* Hash table of the functions we need to enter into the function | |
89 | vector. */ | |
90 | struct funcvec_hash_table *funcvec_hash_table; | |
91 | }; | |
92 | ||
93 | static struct bfd_link_hash_table *h8300_coff_link_hash_table_create | |
94 | PARAMS ((bfd *)); | |
95 | ||
96 | /* Get the H8/300 COFF linker hash table from a link_info structure. */ | |
97 | ||
98 | #define h8300_coff_hash_table(p) \ | |
99 | ((struct h8300_coff_link_hash_table *) ((coff_hash_table (p)))) | |
100 | ||
101 | /* Initialize fields within a funcvec hash table entry. Called whenever | |
102 | a new entry is added to the funcvec hash table. */ | |
103 | ||
104 | static struct bfd_hash_entry * | |
105 | funcvec_hash_newfunc (entry, gen_table, string) | |
106 | struct bfd_hash_entry *entry; | |
107 | struct bfd_hash_table *gen_table; | |
108 | const char *string; | |
109 | { | |
110 | struct funcvec_hash_entry *ret; | |
111 | struct funcvec_hash_table *table; | |
112 | ||
113 | ret = (struct funcvec_hash_entry *) entry; | |
114 | table = (struct funcvec_hash_table *) gen_table; | |
115 | ||
116 | /* Allocate the structure if it has not already been allocated by a | |
117 | subclass. */ | |
118 | if (ret == NULL) | |
119 | ret = ((struct funcvec_hash_entry *) | |
120 | bfd_hash_allocate (gen_table, | |
121 | sizeof (struct funcvec_hash_entry))); | |
122 | if (ret == NULL) | |
123 | return NULL; | |
124 | ||
125 | /* Call the allocation method of the superclass. */ | |
126 | ret = ((struct funcvec_hash_entry *) | |
127 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, gen_table, string)); | |
128 | ||
129 | if (ret == NULL) | |
130 | return NULL; | |
131 | ||
132 | /* Note where this entry will reside in the function vector table. */ | |
133 | ret->offset = table->offset; | |
134 | ||
135 | /* Bump the offset at which we store entries in the function | |
136 | vector. We'd like to bump up the size of the vectors section, | |
137 | but it's not easily available here. */ | |
138 | if (bfd_get_mach (table->abfd) == bfd_mach_h8300) | |
139 | table->offset += 2; | |
140 | else if (bfd_get_mach (table->abfd) == bfd_mach_h8300h | |
141 | || bfd_get_mach (table->abfd) == bfd_mach_h8300s) | |
142 | table->offset += 4; | |
143 | else | |
144 | return NULL; | |
145 | ||
146 | /* Everything went OK. */ | |
147 | return (struct bfd_hash_entry *) ret; | |
148 | } | |
149 | ||
150 | /* Initialize the function vector hash table. */ | |
151 | ||
152 | static boolean | |
153 | funcvec_hash_table_init (table, abfd, newfunc) | |
154 | struct funcvec_hash_table *table; | |
155 | bfd *abfd; | |
156 | struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, | |
157 | struct bfd_hash_table *, | |
158 | const char *)); | |
159 | { | |
160 | /* Initialize our local fields, then call the generic initialization | |
161 | routine. */ | |
162 | table->offset = 0; | |
163 | table->abfd = abfd; | |
164 | return (bfd_hash_table_init (&table->root, newfunc)); | |
165 | } | |
166 | ||
167 | /* Create the derived linker hash table. We use a derived hash table | |
168 | basically to hold "static" information during an h8/300 coff link | |
169 | without using static variables. */ | |
170 | ||
171 | static struct bfd_link_hash_table * | |
172 | h8300_coff_link_hash_table_create (abfd) | |
173 | bfd *abfd; | |
174 | { | |
175 | struct h8300_coff_link_hash_table *ret; | |
176 | ret = ((struct h8300_coff_link_hash_table *) | |
177 | bfd_alloc (abfd, sizeof (struct h8300_coff_link_hash_table))); | |
178 | if (ret == NULL) | |
179 | return NULL; | |
180 | if (!_bfd_link_hash_table_init (&ret->root.root, abfd, _bfd_generic_link_hash_newfunc)) | |
181 | { | |
182 | bfd_release (abfd, ret); | |
183 | return NULL; | |
184 | } | |
185 | ||
186 | /* Initialize our data. */ | |
187 | ret->vectors_sec = NULL; | |
188 | ret->funcvec_hash_table = NULL; | |
189 | ||
190 | /* OK. Everything's intialized, return the base pointer. */ | |
191 | return &ret->root.root; | |
192 | } | |
193 | ||
194 | /* special handling for H8/300 relocs. | |
195 | We only come here for pcrel stuff and return normally if not an -r link. | |
196 | When doing -r, we can't do any arithmetic for the pcrel stuff, because | |
197 | the code in reloc.c assumes that we can manipulate the targets of | |
198 | the pcrel branches. This isn't so, since the H8/300 can do relaxing, | |
199 | which means that the gap after the instruction may not be enough to | |
200 | contain the offset required for the branch, so we have to use the only | |
201 | the addend until the final link */ | |
202 | ||
203 | static bfd_reloc_status_type | |
204 | special (abfd, reloc_entry, symbol, data, input_section, output_bfd, | |
205 | error_message) | |
206 | bfd *abfd; | |
207 | arelent *reloc_entry; | |
208 | asymbol *symbol; | |
209 | PTR data; | |
210 | asection *input_section; | |
211 | bfd *output_bfd; | |
212 | char **error_message; | |
213 | { | |
214 | if (output_bfd == (bfd *) NULL) | |
215 | return bfd_reloc_continue; | |
216 | ||
217 | return bfd_reloc_ok; | |
218 | } | |
219 | ||
220 | static reloc_howto_type howto_table[] = | |
221 | { | |
222 | HOWTO (R_RELBYTE, 0, 0, 8, false, 0, complain_overflow_bitfield, special, "8", false, 0x000000ff, 0x000000ff, false), | |
223 | HOWTO (R_RELWORD, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "16", false, 0x0000ffff, 0x0000ffff, false), | |
224 | HOWTO (R_RELLONG, 0, 2, 32, false, 0, complain_overflow_bitfield, special, "32", false, 0xffffffff, 0xffffffff, false), | |
225 | HOWTO (R_PCRBYTE, 0, 0, 8, true, 0, complain_overflow_signed, special, "DISP8", false, 0x000000ff, 0x000000ff, true), | |
226 | HOWTO (R_PCRWORD, 0, 1, 16, true, 0, complain_overflow_signed, special, "DISP16", false, 0x0000ffff, 0x0000ffff, true), | |
227 | HOWTO (R_PCRLONG, 0, 2, 32, true, 0, complain_overflow_signed, special, "DISP32", false, 0xffffffff, 0xffffffff, true), | |
228 | HOWTO (R_MOV16B1, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "relaxable mov.b:16", false, 0x0000ffff, 0x0000ffff, false), | |
229 | HOWTO (R_MOV16B2, 0, 1, 8, false, 0, complain_overflow_bitfield, special, "relaxed mov.b:16", false, 0x000000ff, 0x000000ff, false), | |
230 | HOWTO (R_JMP1, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "16/pcrel", false, 0x0000ffff, 0x0000ffff, false), | |
231 | HOWTO (R_JMP2, 0, 0, 8, false, 0, complain_overflow_bitfield, special, "pcrecl/16", false, 0x000000ff, 0x000000ff, false), | |
232 | HOWTO (R_JMPL1, 0, 2, 32, false, 0, complain_overflow_bitfield, special, "24/pcrell", false, 0x00ffffff, 0x00ffffff, false), | |
233 | HOWTO (R_JMPL2, 0, 0, 8, false, 0, complain_overflow_bitfield, special, "pc8/24", false, 0x000000ff, 0x000000ff, false), | |
234 | HOWTO (R_MOV24B1, 0, 1, 32, false, 0, complain_overflow_bitfield, special, "relaxable mov.b:24", false, 0xffffffff, 0xffffffff, false), | |
235 | HOWTO (R_MOV24B2, 0, 1, 8, false, 0, complain_overflow_bitfield, special, "relaxed mov.b:24", false, 0x0000ffff, 0x0000ffff, false), | |
236 | ||
237 | /* An indirect reference to a function. This causes the function's address | |
238 | to be added to the function vector in lo-mem and puts the address of | |
239 | the function vector's entry in the jsr instruction. */ | |
240 | HOWTO (R_MEM_INDIRECT, 0, 0, 8, false, 0, complain_overflow_bitfield, special, "8/indirect", false, 0x000000ff, 0x000000ff, false), | |
241 | ||
242 | /* Internal reloc for relaxing. This is created when a 16bit pc-relative | |
243 | branch is turned into an 8bit pc-relative branch. */ | |
244 | HOWTO (R_PCRWORD_B, 0, 0, 8, true, 0, complain_overflow_bitfield, special, "relaxed bCC:16", false, 0x000000ff, 0x000000ff, false), | |
245 | ||
246 | HOWTO (R_MOVL1, 0, 2, 32, false, 0, complain_overflow_bitfield,special, "32/24 relaxable move", false, 0xffffffff, 0xffffffff, false), | |
247 | ||
248 | HOWTO (R_MOVL2, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "32/24 relaxed move", false, 0x0000ffff, 0x0000ffff, false), | |
249 | ||
250 | HOWTO (R_BCC_INV, 0, 0, 8, true, 0, complain_overflow_signed, special, "DISP8 inverted", false, 0x000000ff, 0x000000ff, true), | |
251 | ||
252 | HOWTO (R_JMP_DEL, 0, 0, 8, true, 0, complain_overflow_signed, special, "Deleted jump", false, 0x000000ff, 0x000000ff, true), | |
253 | }; | |
254 | ||
255 | ||
256 | /* Turn a howto into a reloc number */ | |
257 | ||
258 | #define SELECT_RELOC(x,howto) \ | |
259 | { x.r_type = select_reloc(howto); } | |
260 | ||
261 | #define BADMAG(x) (H8300BADMAG(x) && H8300HBADMAG(x) && H8300SBADMAG(x)) | |
262 | #define H8300 1 /* Customize coffcode.h */ | |
263 | #define __A_MAGIC_SET__ | |
264 | ||
265 | ||
266 | ||
267 | /* Code to swap in the reloc */ | |
268 | #define SWAP_IN_RELOC_OFFSET bfd_h_get_32 | |
269 | #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32 | |
270 | #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ | |
271 | dst->r_stuff[0] = 'S'; \ | |
272 | dst->r_stuff[1] = 'C'; | |
273 | ||
274 | ||
275 | static int | |
276 | select_reloc (howto) | |
277 | reloc_howto_type *howto; | |
278 | { | |
279 | return howto->type; | |
280 | } | |
281 | ||
282 | /* Code to turn a r_type into a howto ptr, uses the above howto table | |
283 | */ | |
284 | ||
285 | static void | |
286 | rtype2howto (internal, dst) | |
287 | arelent *internal; | |
288 | struct internal_reloc *dst; | |
289 | { | |
290 | switch (dst->r_type) | |
291 | { | |
292 | case R_RELBYTE: | |
293 | internal->howto = howto_table + 0; | |
294 | break; | |
295 | case R_RELWORD: | |
296 | internal->howto = howto_table + 1; | |
297 | break; | |
298 | case R_RELLONG: | |
299 | internal->howto = howto_table + 2; | |
300 | break; | |
301 | case R_PCRBYTE: | |
302 | internal->howto = howto_table + 3; | |
303 | break; | |
304 | case R_PCRWORD: | |
305 | internal->howto = howto_table + 4; | |
306 | break; | |
307 | case R_PCRLONG: | |
308 | internal->howto = howto_table + 5; | |
309 | break; | |
310 | case R_MOV16B1: | |
311 | internal->howto = howto_table + 6; | |
312 | break; | |
313 | case R_MOV16B2: | |
314 | internal->howto = howto_table + 7; | |
315 | break; | |
316 | case R_JMP1: | |
317 | internal->howto = howto_table + 8; | |
318 | break; | |
319 | case R_JMP2: | |
320 | internal->howto = howto_table + 9; | |
321 | break; | |
322 | case R_JMPL1: | |
323 | internal->howto = howto_table + 10; | |
324 | break; | |
325 | case R_JMPL2: | |
326 | internal->howto = howto_table + 11; | |
327 | break; | |
328 | case R_MOV24B1: | |
329 | internal->howto = howto_table + 12; | |
330 | break; | |
331 | case R_MOV24B2: | |
332 | internal->howto = howto_table + 13; | |
333 | break; | |
334 | case R_MEM_INDIRECT: | |
335 | internal->howto = howto_table + 14; | |
336 | break; | |
337 | case R_PCRWORD_B: | |
338 | internal->howto = howto_table + 15; | |
339 | break; | |
340 | case R_MOVL1: | |
341 | internal->howto = howto_table + 16; | |
342 | break; | |
343 | case R_MOVL2: | |
344 | internal->howto = howto_table + 17; | |
345 | break; | |
346 | case R_BCC_INV: | |
347 | internal->howto = howto_table + 18; | |
348 | break; | |
349 | case R_JMP_DEL: | |
350 | internal->howto = howto_table + 19; | |
351 | break; | |
352 | default: | |
353 | abort (); | |
354 | break; | |
355 | } | |
356 | } | |
357 | ||
358 | #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry) | |
359 | ||
360 | ||
361 | /* Perform any necessary magic to the addend in a reloc entry */ | |
362 | ||
363 | ||
364 | #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \ | |
365 | cache_ptr->addend = ext_reloc.r_offset; | |
366 | ||
367 | ||
368 | #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ | |
369 | reloc_processing(relent, reloc, symbols, abfd, section) | |
370 | ||
371 | static void | |
372 | reloc_processing (relent, reloc, symbols, abfd, section) | |
373 | arelent * relent; | |
374 | struct internal_reloc *reloc; | |
375 | asymbol ** symbols; | |
376 | bfd * abfd; | |
377 | asection * section; | |
378 | { | |
379 | relent->address = reloc->r_vaddr; | |
380 | rtype2howto (relent, reloc); | |
381 | ||
382 | if (((int) reloc->r_symndx) > 0) | |
383 | { | |
384 | relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; | |
385 | } | |
386 | else | |
387 | { | |
388 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
389 | } | |
390 | ||
391 | ||
392 | ||
393 | relent->addend = reloc->r_offset; | |
394 | ||
395 | relent->address -= section->vma; | |
396 | /* relent->section = 0;*/ | |
397 | } | |
398 | ||
399 | static boolean | |
400 | h8300_symbol_address_p (abfd, input_section, address) | |
401 | bfd *abfd; | |
402 | asection *input_section; | |
403 | bfd_vma address; | |
404 | { | |
405 | asymbol **s; | |
406 | ||
407 | s = _bfd_generic_link_get_symbols (abfd); | |
408 | BFD_ASSERT (s != (asymbol **) NULL); | |
409 | ||
410 | /* Search all the symbols for one in INPUT_SECTION with | |
411 | address ADDRESS. */ | |
412 | while (*s) | |
413 | { | |
414 | asymbol *p = *s; | |
415 | if (p->section == input_section | |
416 | && (input_section->output_section->vma | |
417 | + input_section->output_offset | |
418 | + p->value) == address) | |
419 | return true; | |
420 | s++; | |
421 | } | |
422 | return false; | |
423 | } | |
424 | ||
425 | ||
426 | /* If RELOC represents a relaxable instruction/reloc, change it into | |
427 | the relaxed reloc, notify the linker that symbol addresses | |
428 | have changed (bfd_perform_slip) and return how much the current | |
429 | section has shrunk by. | |
430 | ||
431 | FIXME: Much of this code has knowledge of the ordering of entries | |
432 | in the howto table. This needs to be fixed. */ | |
433 | ||
434 | static int | |
435 | h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info) | |
436 | bfd *abfd; | |
437 | asection *input_section; | |
438 | arelent *reloc; | |
439 | unsigned int shrink; | |
440 | struct bfd_link_info *link_info; | |
441 | { | |
442 | bfd_vma value; | |
443 | bfd_vma dot; | |
444 | bfd_vma gap; | |
445 | static asection *last_input_section = NULL; | |
446 | static arelent *last_reloc = NULL; | |
447 | ||
448 | /* The address of the thing to be relocated will have moved back by | |
449 | the size of the shrink - but we don't change reloc->address here, | |
450 | since we need it to know where the relocation lives in the source | |
451 | uncooked section. */ | |
452 | bfd_vma address = reloc->address - shrink; | |
453 | ||
454 | if (input_section != last_input_section) | |
455 | last_reloc = NULL; | |
456 | ||
457 | /* Only examine the relocs which might be relaxable. */ | |
458 | switch (reloc->howto->type) | |
459 | { | |
460 | ||
461 | /* This is the 16/24 bit absolute branch which could become an 8 bit | |
462 | pc-relative branch. */ | |
463 | case R_JMP1: | |
464 | case R_JMPL1: | |
465 | /* Get the address of the target of this branch. */ | |
466 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
467 | ||
468 | /* Get the address of the next instruction (not the reloc). */ | |
469 | dot = (input_section->output_section->vma | |
470 | + input_section->output_offset + address); | |
471 | ||
472 | /* Adjust for R_JMP1 vs R_JMPL1. */ | |
473 | dot += (reloc->howto->type == R_JMP1 ? 1 : 2); | |
474 | ||
475 | /* Compute the distance from this insn to the branch target. */ | |
476 | gap = value - dot; | |
477 | ||
478 | /* If the distance is within -128..+128 inclusive, then we can relax | |
479 | this jump. +128 is valid since the target will move two bytes | |
480 | closer if we do relax this branch. */ | |
481 | if ((int)gap >= -128 && (int)gap <= 128 ) | |
482 | { | |
483 | ||
484 | /* It's possible we may be able to eliminate this branch entirely; | |
485 | if the previous instruction is a branch around this instruction, | |
486 | and there's no label at this instruction, then we can reverse | |
487 | the condition on the previous branch and eliminate this jump. | |
488 | ||
489 | original: new: | |
490 | bCC lab1 bCC' lab2 | |
491 | jmp lab2 | |
492 | lab1: lab1: | |
493 | ||
494 | This saves 4 bytes instead of two, and should be relatively | |
495 | common. */ | |
496 | ||
497 | if (gap <= 126 | |
498 | && last_reloc | |
499 | && last_reloc->howto->type == R_PCRBYTE) | |
500 | { | |
501 | bfd_vma last_value; | |
502 | last_value = bfd_coff_reloc16_get_value (last_reloc, link_info, | |
503 | input_section) + 1; | |
504 | ||
505 | if (last_value == dot + 2 | |
506 | && last_reloc->address + 1 == reloc->address | |
507 | && ! h8300_symbol_address_p (abfd, input_section, dot - 2)) | |
508 | { | |
509 | reloc->howto = howto_table + 19; | |
510 | last_reloc->howto = howto_table + 18; | |
511 | last_reloc->sym_ptr_ptr = reloc->sym_ptr_ptr; | |
512 | last_reloc->addend = reloc->addend; | |
513 | shrink += 4; | |
514 | bfd_perform_slip (abfd, 4, input_section, address); | |
515 | break; | |
516 | } | |
517 | } | |
518 | ||
519 | /* Change the reloc type. */ | |
520 | reloc->howto = reloc->howto + 1; | |
521 | ||
522 | /* This shrinks this section by two bytes. */ | |
523 | shrink += 2; | |
524 | bfd_perform_slip(abfd, 2, input_section, address); | |
525 | } | |
526 | break; | |
527 | ||
528 | /* This is the 16 bit pc-relative branch which could become an 8 bit | |
529 | pc-relative branch. */ | |
530 | case R_PCRWORD: | |
531 | /* Get the address of the target of this branch, add one to the value | |
532 | because the addend field in PCrel jumps is off by -1. */ | |
533 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section) + 1; | |
534 | ||
535 | /* Get the address of the next instruction if we were to relax. */ | |
536 | dot = input_section->output_section->vma + | |
537 | input_section->output_offset + address; | |
538 | ||
539 | /* Compute the distance from this insn to the branch target. */ | |
540 | gap = value - dot; | |
541 | ||
542 | /* If the distance is within -128..+128 inclusive, then we can relax | |
543 | this jump. +128 is valid since the target will move two bytes | |
544 | closer if we do relax this branch. */ | |
545 | if ((int)gap >= -128 && (int)gap <= 128 ) | |
546 | { | |
547 | /* Change the reloc type. */ | |
548 | reloc->howto = howto_table + 15; | |
549 | ||
550 | /* This shrinks this section by two bytes. */ | |
551 | shrink += 2; | |
552 | bfd_perform_slip(abfd, 2, input_section, address); | |
553 | } | |
554 | break; | |
555 | ||
556 | /* This is a 16 bit absolute address in a mov.b insn, which can | |
557 | become an 8 bit absolute address if it's in the right range. */ | |
558 | case R_MOV16B1: | |
559 | /* Get the address of the data referenced by this mov.b insn. */ | |
560 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
561 | ||
562 | /* The address is in 0xff00..0xffff inclusive on the h8300 or | |
563 | 0xffff00..0xffffff inclusive on the h8300h, then we can | |
564 | relax this mov.b */ | |
565 | if ((bfd_get_mach (abfd) == bfd_mach_h8300 | |
566 | && value >= 0xff00 | |
567 | && value <= 0xffff) | |
568 | || ((bfd_get_mach (abfd) == bfd_mach_h8300h | |
569 | || bfd_get_mach (abfd) == bfd_mach_h8300s) | |
570 | && value >= 0xffff00 | |
571 | && value <= 0xffffff)) | |
572 | { | |
573 | /* Change the reloc type. */ | |
574 | reloc->howto = reloc->howto + 1; | |
575 | ||
576 | /* This shrinks this section by two bytes. */ | |
577 | shrink += 2; | |
578 | bfd_perform_slip(abfd, 2, input_section, address); | |
579 | } | |
580 | break; | |
581 | ||
582 | /* Similarly for a 24 bit absolute address in a mov.b. Note that | |
583 | if we can't relax this into an 8 bit absolute, we'll fall through | |
584 | and try to relax it into a 16bit absolute. */ | |
585 | case R_MOV24B1: | |
586 | /* Get the address of the data referenced by this mov.b insn. */ | |
587 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
588 | ||
589 | /* The address is in 0xffff00..0xffffff inclusive on the h8300h, | |
590 | then we can relax this mov.b */ | |
591 | if ((bfd_get_mach (abfd) == bfd_mach_h8300h | |
592 | || bfd_get_mach (abfd) == bfd_mach_h8300s) | |
593 | && value >= 0xffff00 | |
594 | && value <= 0xffffff) | |
595 | { | |
596 | /* Change the reloc type. */ | |
597 | reloc->howto = reloc->howto + 1; | |
598 | ||
599 | /* This shrinks this section by four bytes. */ | |
600 | shrink += 4; | |
601 | bfd_perform_slip(abfd, 4, input_section, address); | |
602 | ||
603 | /* Done with this reloc. */ | |
604 | break; | |
605 | } | |
606 | ||
607 | /* FALLTHROUGH and try to turn the 32/24 bit reloc into a 16 bit | |
608 | reloc. */ | |
609 | ||
610 | /* This is a 24/32 bit absolute address in a mov insn, which can | |
611 | become an 16 bit absolute address if it's in the right range. */ | |
612 | case R_MOVL1: | |
613 | /* Get the address of the data referenced by this mov insn. */ | |
614 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
615 | ||
616 | /* If this address is in 0x0000..0x7fff inclusive or | |
617 | 0xff8000..0xffffff inclusive, then it can be relaxed. */ | |
618 | if (value <= 0x7fff || value >= 0xff8000) | |
619 | { | |
620 | /* Change the reloc type. */ | |
621 | reloc->howto = howto_table + 17; | |
622 | ||
623 | /* This shrinks this section by two bytes. */ | |
624 | shrink += 2; | |
625 | bfd_perform_slip(abfd, 2, input_section, address); | |
626 | } | |
627 | break; | |
628 | ||
629 | /* No other reloc types represent relaxing opportunities. */ | |
630 | default: | |
631 | break; | |
632 | } | |
633 | ||
634 | last_reloc = reloc; | |
635 | last_input_section = input_section; | |
636 | return shrink; | |
637 | } | |
638 | ||
639 | ||
640 | /* Handle relocations for the H8/300, including relocs for relaxed | |
641 | instructions. | |
642 | ||
643 | FIXME: Not all relocations check for overflow! */ | |
644 | ||
645 | static void | |
646 | h8300_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr, | |
647 | dst_ptr) | |
648 | bfd *abfd; | |
649 | struct bfd_link_info *link_info; | |
650 | struct bfd_link_order *link_order; | |
651 | arelent *reloc; | |
652 | bfd_byte *data; | |
653 | unsigned int *src_ptr; | |
654 | unsigned int *dst_ptr; | |
655 | { | |
656 | unsigned int src_address = *src_ptr; | |
657 | unsigned int dst_address = *dst_ptr; | |
658 | asection *input_section = link_order->u.indirect.section; | |
659 | bfd_vma value; | |
660 | bfd_vma dot; | |
661 | int gap,tmp; | |
662 | ||
663 | switch (reloc->howto->type) | |
664 | { | |
665 | ||
666 | /* Generic 8bit pc-relative relocation. */ | |
667 | case R_PCRBYTE: | |
668 | /* Get the address of the target of this branch. */ | |
669 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
670 | ||
671 | dot = (link_order->offset | |
672 | + dst_address | |
673 | + link_order->u.indirect.section->output_section->vma); | |
674 | ||
675 | gap = value - dot; | |
676 | ||
677 | /* Sanity check. */ | |
678 | if (gap < -128 || gap > 126) | |
679 | { | |
680 | if (! ((*link_info->callbacks->reloc_overflow) | |
681 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
682 | reloc->howto->name, reloc->addend, input_section->owner, | |
683 | input_section, reloc->address))) | |
684 | abort (); | |
685 | } | |
686 | ||
687 | /* Everything looks OK. Apply the relocation and update the | |
688 | src/dst address appropriately. */ | |
689 | ||
690 | bfd_put_8 (abfd, gap, data + dst_address); | |
691 | dst_address++; | |
692 | src_address++; | |
693 | ||
694 | /* All done. */ | |
695 | break; | |
696 | ||
697 | /* Generic 16bit pc-relative relocation. */ | |
698 | case R_PCRWORD: | |
699 | /* Get the address of the target of this branch. */ | |
700 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
701 | ||
702 | /* Get the address of the instruction (not the reloc). */ | |
703 | dot = (link_order->offset | |
704 | + dst_address | |
705 | + link_order->u.indirect.section->output_section->vma + 1); | |
706 | ||
707 | gap = value - dot; | |
708 | ||
709 | /* Sanity check. */ | |
710 | if (gap > 32766 || gap < -32768) | |
711 | { | |
712 | if (! ((*link_info->callbacks->reloc_overflow) | |
713 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
714 | reloc->howto->name, reloc->addend, input_section->owner, | |
715 | input_section, reloc->address))) | |
716 | abort (); | |
717 | } | |
718 | ||
719 | /* Everything looks OK. Apply the relocation and update the | |
720 | src/dst address appropriately. */ | |
721 | ||
722 | bfd_put_16 (abfd, gap, data + dst_address); | |
723 | dst_address += 2; | |
724 | src_address += 2; | |
725 | ||
726 | /* All done. */ | |
727 | break; | |
728 | ||
729 | /* Generic 8bit absolute relocation. */ | |
730 | case R_RELBYTE: | |
731 | /* Get the address of the object referenced by this insn. */ | |
732 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
733 | ||
734 | /* Sanity check. */ | |
735 | if (value <= 0xff | |
736 | || (value >= 0x0000ff00 && value <= 0x0000ffff) | |
737 | || (value >= 0x00ffff00 && value <= 0x00ffffff) | |
738 | || (value >= 0xffffff00 && value <= 0xffffffff)) | |
739 | { | |
740 | /* Everything looks OK. Apply the relocation and update the | |
741 | src/dst address appropriately. */ | |
742 | ||
743 | bfd_put_8 (abfd, value & 0xff, data + dst_address); | |
744 | dst_address += 1; | |
745 | src_address += 1; | |
746 | } | |
747 | else | |
748 | { | |
749 | if (! ((*link_info->callbacks->reloc_overflow) | |
750 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
751 | reloc->howto->name, reloc->addend, input_section->owner, | |
752 | input_section, reloc->address))) | |
753 | abort (); | |
754 | } | |
755 | ||
756 | /* All done. */ | |
757 | break; | |
758 | ||
759 | /* Various simple 16bit absolute relocations. */ | |
760 | case R_MOV16B1: | |
761 | case R_JMP1: | |
762 | case R_RELWORD: | |
763 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
764 | bfd_put_16 (abfd, value, data + dst_address); | |
765 | dst_address += 2; | |
766 | src_address += 2; | |
767 | break; | |
768 | ||
769 | /* Various simple 24/32bit absolute relocations. */ | |
770 | case R_MOV24B1: | |
771 | case R_MOVL1: | |
772 | case R_RELLONG: | |
773 | /* Get the address of the target of this branch. */ | |
774 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section), | |
775 | bfd_put_32 (abfd, value, data + dst_address); | |
776 | dst_address += 4; | |
777 | src_address += 4; | |
778 | break; | |
779 | ||
780 | /* Another 24/32bit absolute relocation. */ | |
781 | case R_JMPL1: | |
782 | /* Get the address of the target of this branch. */ | |
783 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
784 | ||
785 | value = ((value & 0x00ffffff) | |
786 | | (bfd_get_32 (abfd, data + src_address) & 0xff000000)); | |
787 | bfd_put_32 (abfd, value, data + dst_address); | |
788 | dst_address += 4; | |
789 | src_address += 4; | |
790 | break; | |
791 | ||
792 | /* A 16bit abolute relocation that was formerlly a 24/32bit | |
793 | absolute relocation. */ | |
794 | case R_MOVL2: | |
795 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
796 | ||
797 | /* Sanity check. */ | |
798 | if (value < 0x8000 || value > 0xff8000) | |
799 | { | |
800 | /* Insert the 16bit value into the proper location. */ | |
801 | bfd_put_16 (abfd, value, data + dst_address); | |
802 | ||
803 | /* Fix the opcode. For all the move insns, we simply | |
804 | need to turn off bit 0x20 in the previous byte. */ | |
805 | data[dst_address - 1] &= ~0x20; | |
806 | dst_address += 2; | |
807 | src_address += 4; | |
808 | } | |
809 | else | |
810 | { | |
811 | if (! ((*link_info->callbacks->reloc_overflow) | |
812 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
813 | reloc->howto->name, reloc->addend, input_section->owner, | |
814 | input_section, reloc->address))) | |
815 | abort (); | |
816 | } | |
817 | break; | |
818 | ||
819 | /* A 16bit absolute branch that is now an 8-bit pc-relative branch. */ | |
820 | case R_JMP2: | |
821 | /* Get the address of the target of this branch. */ | |
822 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
823 | ||
824 | /* Get the address of the next instruction. */ | |
825 | dot = (link_order->offset | |
826 | + dst_address | |
827 | + link_order->u.indirect.section->output_section->vma + 1); | |
828 | ||
829 | gap = value - dot; | |
830 | ||
831 | /* Sanity check. */ | |
832 | if (gap < -128 || gap > 126) | |
833 | { | |
834 | if (! ((*link_info->callbacks->reloc_overflow) | |
835 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
836 | reloc->howto->name, reloc->addend, input_section->owner, | |
837 | input_section, reloc->address))) | |
838 | abort (); | |
839 | } | |
840 | ||
841 | /* Now fix the instruction itself. */ | |
842 | switch (data[dst_address - 1]) | |
843 | { | |
844 | case 0x5e: | |
845 | /* jsr -> bsr */ | |
846 | bfd_put_8 (abfd, 0x55, data + dst_address - 1); | |
847 | break; | |
848 | case 0x5a: | |
849 | /* jmp ->bra */ | |
850 | bfd_put_8 (abfd, 0x40, data + dst_address - 1); | |
851 | break; | |
852 | ||
853 | default: | |
854 | abort (); | |
855 | } | |
856 | ||
857 | /* Write out the 8bit value. */ | |
858 | bfd_put_8 (abfd, gap, data + dst_address); | |
859 | ||
860 | dst_address += 1; | |
861 | src_address += 3; | |
862 | ||
863 | break; | |
864 | ||
865 | /* A 16bit pc-relative branch that is now an 8-bit pc-relative branch. */ | |
866 | case R_PCRWORD_B: | |
867 | /* Get the address of the target of this branch. */ | |
868 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
869 | ||
870 | /* Get the address of the instruction (not the reloc). */ | |
871 | dot = (link_order->offset | |
872 | + dst_address | |
873 | + link_order->u.indirect.section->output_section->vma - 1); | |
874 | ||
875 | gap = value - dot; | |
876 | ||
877 | /* Sanity check. */ | |
878 | if (gap < -128 || gap > 126) | |
879 | { | |
880 | if (! ((*link_info->callbacks->reloc_overflow) | |
881 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
882 | reloc->howto->name, reloc->addend, input_section->owner, | |
883 | input_section, reloc->address))) | |
884 | abort (); | |
885 | } | |
886 | ||
887 | /* Now fix the instruction. */ | |
888 | switch (data[dst_address - 2]) | |
889 | { | |
890 | case 0x58: | |
891 | /* bCC:16 -> bCC:8 */ | |
892 | /* Get the condition code from the original insn. */ | |
893 | tmp = data[dst_address - 1]; | |
894 | tmp &= 0xf0; | |
895 | tmp >>= 4; | |
896 | ||
897 | /* Now or in the high nibble of the opcode. */ | |
898 | tmp |= 0x40; | |
899 | ||
900 | /* Write it. */ | |
901 | bfd_put_8 (abfd, tmp, data + dst_address - 2); | |
902 | break; | |
903 | ||
904 | default: | |
905 | abort (); | |
906 | } | |
907 | ||
908 | /* Output the target. */ | |
909 | bfd_put_8 (abfd, gap, data + dst_address - 1); | |
910 | ||
911 | /* We don't advance dst_address -- the 8bit reloc is applied at | |
912 | dst_address - 1, so the next insn should begin at dst_address. */ | |
913 | src_address += 2; | |
914 | ||
915 | break; | |
916 | ||
917 | /* Similarly for a 24bit absolute that is now 8 bits. */ | |
918 | case R_JMPL2: | |
919 | /* Get the address of the target of this branch. */ | |
920 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
921 | ||
922 | /* Get the address of the instruction (not the reloc). */ | |
923 | dot = (link_order->offset | |
924 | + dst_address | |
925 | + link_order->u.indirect.section->output_section->vma + 2); | |
926 | ||
927 | gap = value - dot; | |
928 | ||
929 | /* Fix the instruction. */ | |
930 | switch (data[src_address]) | |
931 | { | |
932 | case 0x5e: | |
933 | /* jsr -> bsr */ | |
934 | bfd_put_8 (abfd, 0x55, data + dst_address); | |
935 | break; | |
936 | case 0x5a: | |
937 | /* jmp ->bra */ | |
938 | bfd_put_8 (abfd, 0x40, data + dst_address); | |
939 | break; | |
940 | default: | |
941 | abort (); | |
942 | } | |
943 | ||
944 | bfd_put_8 (abfd, gap, data + dst_address + 1); | |
945 | dst_address += 2; | |
946 | src_address += 4; | |
947 | ||
948 | break; | |
949 | ||
950 | /* A 16bit absolute mov.b that is now an 8bit absolute mov.b. */ | |
951 | case R_MOV16B2: | |
952 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
953 | ||
954 | /* Sanity check. */ | |
955 | if (data[dst_address - 2] != 0x6a) | |
956 | abort (); | |
957 | ||
958 | /* Fix up the opcode. */ | |
959 | switch (data[src_address-1] & 0xf0) | |
960 | { | |
961 | case 0x00: | |
962 | data[dst_address - 2] = (data[src_address-1] & 0xf) | 0x20; | |
963 | break; | |
964 | case 0x80: | |
965 | data[dst_address - 2] = (data[src_address-1] & 0xf) | 0x30; | |
966 | break; | |
967 | default: | |
968 | abort (); | |
969 | } | |
970 | ||
971 | bfd_put_8 (abfd, value & 0xff, data + dst_address - 1); | |
972 | src_address += 2; | |
973 | break; | |
974 | ||
975 | /* Similarly for a 24bit mov.b */ | |
976 | case R_MOV24B2: | |
977 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
978 | ||
979 | /* Sanity check. */ | |
980 | if (data[dst_address - 2] != 0x6a) | |
981 | abort (); | |
982 | ||
983 | /* Fix up the opcode. */ | |
984 | switch (data[src_address-1] & 0xf0) | |
985 | { | |
986 | case 0x20: | |
987 | data[dst_address - 2] = (data[src_address-1] & 0xf) | 0x20; | |
988 | break; | |
989 | case 0xa0: | |
990 | data[dst_address - 2] = (data[src_address-1] & 0xf) | 0x30; | |
991 | break; | |
992 | default: | |
993 | abort (); | |
994 | } | |
995 | ||
996 | bfd_put_8 (abfd, value & 0xff, data + dst_address - 1); | |
997 | src_address += 4; | |
998 | break; | |
999 | ||
1000 | case R_BCC_INV: | |
1001 | /* Get the address of the target of this branch. */ | |
1002 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
1003 | ||
1004 | dot = (link_order->offset | |
1005 | + dst_address | |
1006 | + link_order->u.indirect.section->output_section->vma) + 1; | |
1007 | ||
1008 | gap = value - dot; | |
1009 | ||
1010 | /* Sanity check. */ | |
1011 | if (gap < -128 || gap > 126) | |
1012 | { | |
1013 | if (! ((*link_info->callbacks->reloc_overflow) | |
1014 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
1015 | reloc->howto->name, reloc->addend, input_section->owner, | |
1016 | input_section, reloc->address))) | |
1017 | abort (); | |
1018 | } | |
1019 | ||
1020 | /* Everything looks OK. Fix the condition in the instruction, apply | |
1021 | the relocation, and update the src/dst address appropriately. */ | |
1022 | ||
1023 | bfd_put_8 (abfd, bfd_get_8 (abfd, data + dst_address - 1) ^ 1, | |
1024 | data + dst_address - 1); | |
1025 | bfd_put_8 (abfd, gap, data + dst_address); | |
1026 | dst_address++; | |
1027 | src_address++; | |
1028 | ||
1029 | /* All done. */ | |
1030 | break; | |
1031 | ||
1032 | case R_JMP_DEL: | |
1033 | src_address += 4; | |
1034 | break; | |
1035 | ||
1036 | /* An 8bit memory indirect instruction (jmp/jsr). | |
1037 | ||
1038 | There's several things that need to be done to handle | |
1039 | this relocation. | |
1040 | ||
1041 | If this is a reloc against the absolute symbol, then | |
1042 | we should handle it just R_RELBYTE. Likewise if it's | |
1043 | for a symbol with a value ge 0 and le 0xff. | |
1044 | ||
1045 | Otherwise it's a jump/call through the function vector, | |
1046 | and the linker is expected to set up the function vector | |
1047 | and put the right value into the jump/call instruction. */ | |
1048 | case R_MEM_INDIRECT: | |
1049 | { | |
1050 | /* We need to find the symbol so we can determine it's | |
1051 | address in the function vector table. */ | |
1052 | asymbol *symbol; | |
1053 | bfd_vma value; | |
1054 | const char *name; | |
1055 | struct funcvec_hash_entry *h; | |
1056 | asection *vectors_sec = h8300_coff_hash_table (link_info)->vectors_sec; | |
1057 | ||
1058 | /* First see if this is a reloc against the absolute symbol | |
1059 | or against a symbol with a nonnegative value <= 0xff. */ | |
1060 | symbol = *(reloc->sym_ptr_ptr); | |
1061 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
1062 | if (symbol == bfd_abs_section_ptr->symbol | |
1063 | || (value >= 0 && value <= 0xff)) | |
1064 | { | |
1065 | /* This should be handled in a manner very similar to | |
1066 | R_RELBYTES. If the value is in range, then just slam | |
1067 | the value into the right location. Else trigger a | |
1068 | reloc overflow callback. */ | |
1069 | if (value >= 0 && value <= 0xff) | |
1070 | { | |
1071 | bfd_put_8 (abfd, value, data + dst_address); | |
1072 | dst_address += 1; | |
1073 | src_address += 1; | |
1074 | } | |
1075 | else | |
1076 | { | |
1077 | if (! ((*link_info->callbacks->reloc_overflow) | |
1078 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
1079 | reloc->howto->name, reloc->addend, input_section->owner, | |
1080 | input_section, reloc->address))) | |
1081 | abort (); | |
1082 | } | |
1083 | break; | |
1084 | } | |
1085 | ||
1086 | /* This is a jump/call through a function vector, and we're | |
1087 | expected to create the function vector ourselves. | |
1088 | ||
1089 | First look up this symbol in the linker hash table -- we need | |
1090 | the derived linker symbol which holds this symbol's index | |
1091 | in the function vector. */ | |
1092 | name = symbol->name; | |
1093 | if (symbol->flags & BSF_LOCAL) | |
1094 | { | |
1095 | char *new_name = bfd_malloc (strlen (name) + 9); | |
1096 | if (new_name == NULL) | |
1097 | abort (); | |
1098 | ||
1099 | strcpy (new_name, name); | |
1100 | sprintf (new_name + strlen (name), "_%08x", | |
1101 | (int)symbol->section); | |
1102 | name = new_name; | |
1103 | } | |
1104 | ||
1105 | h = funcvec_hash_lookup (h8300_coff_hash_table (link_info)->funcvec_hash_table, | |
1106 | name, false, false); | |
1107 | ||
1108 | /* This shouldn't ever happen. If it does that means we've got | |
1109 | data corruption of some kind. Aborting seems like a reasonable | |
1110 | think to do here. */ | |
1111 | if (h == NULL || vectors_sec == NULL) | |
1112 | abort (); | |
1113 | ||
1114 | /* Place the address of the function vector entry into the | |
1115 | reloc's address. */ | |
1116 | bfd_put_8 (abfd, | |
1117 | vectors_sec->output_offset + h->offset, | |
1118 | data + dst_address); | |
1119 | ||
1120 | dst_address++; | |
1121 | src_address++; | |
1122 | ||
1123 | /* Now create an entry in the function vector itself. */ | |
1124 | if (bfd_get_mach (input_section->owner) == bfd_mach_h8300) | |
1125 | bfd_put_16 (abfd, | |
1126 | bfd_coff_reloc16_get_value (reloc, | |
1127 | link_info, | |
1128 | input_section), | |
1129 | vectors_sec->contents + h->offset); | |
1130 | else if (bfd_get_mach (input_section->owner) == bfd_mach_h8300h | |
1131 | || bfd_get_mach (input_section->owner) == bfd_mach_h8300s) | |
1132 | bfd_put_32 (abfd, | |
1133 | bfd_coff_reloc16_get_value (reloc, | |
1134 | link_info, | |
1135 | input_section), | |
1136 | vectors_sec->contents + h->offset); | |
1137 | else | |
1138 | abort (); | |
1139 | ||
1140 | /* Gross. We've already written the contents of the vector section | |
1141 | before we get here... So we write it again with the new data. */ | |
1142 | bfd_set_section_contents (vectors_sec->output_section->owner, | |
1143 | vectors_sec->output_section, | |
1144 | vectors_sec->contents, | |
1145 | vectors_sec->output_offset, | |
1146 | vectors_sec->_raw_size); | |
1147 | break; | |
1148 | } | |
1149 | ||
1150 | default: | |
1151 | abort (); | |
1152 | break; | |
1153 | ||
1154 | } | |
1155 | ||
1156 | *src_ptr = src_address; | |
1157 | *dst_ptr = dst_address; | |
1158 | } | |
1159 | ||
1160 | ||
1161 | /* Routine for the h8300 linker. | |
1162 | ||
1163 | This routine is necessary to handle the special R_MEM_INDIRECT | |
1164 | relocs on the h8300. It's responsible for generating a vectors | |
1165 | section and attaching it to an input bfd as well as sizing | |
1166 | the vectors section. It also creates our vectors hash table. | |
1167 | ||
1168 | It uses the generic linker routines to actually add the symbols. | |
1169 | from this BFD to the bfd linker hash table. It may add a few | |
1170 | selected static symbols to the bfd linker hash table. */ | |
1171 | ||
1172 | static boolean | |
1173 | h8300_bfd_link_add_symbols(abfd, info) | |
1174 | bfd *abfd; | |
1175 | struct bfd_link_info *info; | |
1176 | { | |
1177 | asection *sec; | |
1178 | struct funcvec_hash_table *funcvec_hash_table; | |
1179 | ||
1180 | /* If we haven't created a vectors section, do so now. */ | |
1181 | if (!h8300_coff_hash_table (info)->vectors_sec) | |
1182 | { | |
1183 | flagword flags; | |
1184 | ||
1185 | /* Make sure the appropriate flags are set, including SEC_IN_MEMORY. */ | |
1186 | flags = (SEC_ALLOC | SEC_LOAD | |
1187 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY); | |
1188 | h8300_coff_hash_table (info)->vectors_sec = bfd_make_section (abfd, | |
1189 | ".vectors"); | |
1190 | ||
1191 | /* If the section wasn't created, or we couldn't set the flags, | |
1192 | quit quickly now, rather than dieing a painful death later. */ | |
1193 | if (! h8300_coff_hash_table (info)->vectors_sec | |
1194 | || ! bfd_set_section_flags (abfd, | |
1195 | h8300_coff_hash_table(info)->vectors_sec, | |
1196 | flags)) | |
1197 | return false; | |
1198 | ||
1199 | /* Also create the vector hash table. */ | |
1200 | funcvec_hash_table = ((struct funcvec_hash_table *) | |
1201 | bfd_alloc (abfd, sizeof (struct funcvec_hash_table))); | |
1202 | ||
1203 | if (!funcvec_hash_table) | |
1204 | return false; | |
1205 | ||
1206 | /* And initialize the funcvec hash table. */ | |
1207 | if (!funcvec_hash_table_init (funcvec_hash_table, abfd, | |
1208 | funcvec_hash_newfunc)) | |
1209 | { | |
1210 | bfd_release (abfd, funcvec_hash_table); | |
1211 | return false; | |
1212 | } | |
1213 | ||
1214 | /* Store away a pointer to the funcvec hash table. */ | |
1215 | h8300_coff_hash_table (info)->funcvec_hash_table = funcvec_hash_table; | |
1216 | } | |
1217 | ||
1218 | /* Load up the function vector hash table. */ | |
1219 | funcvec_hash_table = h8300_coff_hash_table (info)->funcvec_hash_table; | |
1220 | ||
1221 | /* Add the symbols using the generic code. */ | |
1222 | _bfd_generic_link_add_symbols (abfd, info); | |
1223 | ||
1224 | /* Now scan the relocs for all the sections in this bfd; create | |
1225 | additional space in the .vectors section as needed. */ | |
1226 | for (sec = abfd->sections; sec; sec = sec->next) | |
1227 | { | |
1228 | long reloc_size, reloc_count, i; | |
1229 | asymbol **symbols; | |
1230 | arelent **relocs; | |
1231 | ||
1232 | /* Suck in the relocs, symbols & canonicalize them. */ | |
1233 | reloc_size = bfd_get_reloc_upper_bound (abfd, sec); | |
1234 | if (reloc_size <= 0) | |
1235 | continue; | |
1236 | ||
1237 | relocs = (arelent **)bfd_malloc ((size_t)reloc_size); | |
1238 | if (!relocs) | |
1239 | return false; | |
1240 | ||
1241 | /* The symbols should have been read in by _bfd_generic link_add_symbols | |
1242 | call abovec, so we can cheat and use the pointer to them that was | |
1243 | saved in the above call. */ | |
1244 | symbols = _bfd_generic_link_get_symbols(abfd); | |
1245 | reloc_count = bfd_canonicalize_reloc (abfd, sec, relocs, symbols); | |
1246 | if (reloc_count <= 0) | |
1247 | { | |
1248 | free (relocs); | |
1249 | continue; | |
1250 | } | |
1251 | ||
1252 | /* Now walk through all the relocations in this section. */ | |
1253 | for (i = 0; i < reloc_count; i++) | |
1254 | { | |
1255 | arelent *reloc = relocs[i]; | |
1256 | asymbol *symbol = *(reloc->sym_ptr_ptr); | |
1257 | const char *name; | |
1258 | ||
1259 | /* We've got an indirect reloc. See if we need to add it | |
1260 | to the function vector table. At this point, we have | |
1261 | to add a new entry for each unique symbol referenced | |
1262 | by an R_MEM_INDIRECT relocation except for a reloc | |
1263 | against the absolute section symbol. */ | |
1264 | if (reloc->howto->type == R_MEM_INDIRECT | |
1265 | && symbol != bfd_abs_section_ptr->symbol) | |
1266 | ||
1267 | { | |
1268 | struct funcvec_hash_entry *h; | |
1269 | ||
1270 | name = symbol->name; | |
1271 | if (symbol->flags & BSF_LOCAL) | |
1272 | { | |
1273 | char *new_name = bfd_malloc (strlen (name) + 9); | |
1274 | ||
1275 | if (new_name == NULL) | |
1276 | abort (); | |
1277 | ||
1278 | strcpy (new_name, name); | |
1279 | sprintf (new_name + strlen (name), "_%08x", | |
1280 | (int)symbol->section); | |
1281 | name = new_name; | |
1282 | } | |
1283 | ||
1284 | /* Look this symbol up in the function vector hash table. */ | |
1285 | h = funcvec_hash_lookup (h8300_coff_hash_table (info)->funcvec_hash_table, | |
1286 | name, false, false); | |
1287 | ||
1288 | ||
1289 | /* If this symbol isn't already in the hash table, add | |
1290 | it and bump up the size of the hash table. */ | |
1291 | if (h == NULL) | |
1292 | { | |
1293 | h = funcvec_hash_lookup (h8300_coff_hash_table (info)->funcvec_hash_table, | |
1294 | name, true, true); | |
1295 | if (h == NULL) | |
1296 | { | |
1297 | free (relocs); | |
1298 | return false; | |
1299 | } | |
1300 | ||
1301 | /* Bump the size of the vectors section. Each vector | |
1302 | takes 2 bytes on the h8300 and 4 bytes on the h8300h. */ | |
1303 | if (bfd_get_mach (abfd) == bfd_mach_h8300) | |
1304 | h8300_coff_hash_table (info)->vectors_sec->_raw_size += 2; | |
1305 | else if (bfd_get_mach (abfd) == bfd_mach_h8300h | |
1306 | || bfd_get_mach (abfd) == bfd_mach_h8300s) | |
1307 | h8300_coff_hash_table (info)->vectors_sec->_raw_size += 4; | |
1308 | } | |
1309 | } | |
1310 | } | |
1311 | ||
1312 | /* We're done with the relocations, release them. */ | |
1313 | free (relocs); | |
1314 | } | |
1315 | ||
1316 | /* Now actually allocate some space for the function vector. It's | |
1317 | wasteful to do this more than once, but this is easier. */ | |
1318 | if (h8300_coff_hash_table (info)->vectors_sec->_raw_size != 0) | |
1319 | { | |
1320 | /* Free the old contents. */ | |
1321 | if (h8300_coff_hash_table (info)->vectors_sec->contents) | |
1322 | free (h8300_coff_hash_table (info)->vectors_sec->contents); | |
1323 | ||
1324 | /* Allocate new contents. */ | |
1325 | h8300_coff_hash_table (info)->vectors_sec->contents | |
1326 | = bfd_malloc (h8300_coff_hash_table (info)->vectors_sec->_raw_size); | |
1327 | } | |
1328 | ||
1329 | return true; | |
1330 | } | |
1331 | ||
1332 | #define coff_reloc16_extra_cases h8300_reloc16_extra_cases | |
1333 | #define coff_reloc16_estimate h8300_reloc16_estimate | |
1334 | #define coff_bfd_link_add_symbols h8300_bfd_link_add_symbols | |
1335 | #define coff_bfd_link_hash_table_create h8300_coff_link_hash_table_create | |
1336 | ||
1337 | #define COFF_LONG_FILENAMES | |
1338 | #include "coffcode.h" | |
1339 | ||
1340 | ||
1341 | #undef coff_bfd_get_relocated_section_contents | |
1342 | #undef coff_bfd_relax_section | |
1343 | #define coff_bfd_get_relocated_section_contents \ | |
1344 | bfd_coff_reloc16_get_relocated_section_contents | |
1345 | #define coff_bfd_relax_section bfd_coff_reloc16_relax_section | |
1346 | ||
1347 | ||
1348 | ||
1349 | const bfd_target h8300coff_vec = | |
1350 | { | |
1351 | "coff-h8300", /* name */ | |
1352 | bfd_target_coff_flavour, | |
1353 | BFD_ENDIAN_BIG, /* data byte order is big */ | |
1354 | BFD_ENDIAN_BIG, /* header byte order is big */ | |
1355 | ||
1356 | (HAS_RELOC | EXEC_P | /* object flags */ | |
1357 | HAS_LINENO | HAS_DEBUG | | |
1358 | HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ), | |
1359 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
1360 | '_', /* leading char */ | |
1361 | '/', /* ar_pad_char */ | |
1362 | 15, /* ar_max_namelen */ | |
1363 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
1364 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
1365 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ | |
1366 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
1367 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
1368 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ | |
1369 | ||
1370 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ | |
1371 | bfd_generic_archive_p, _bfd_dummy_target}, | |
1372 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ | |
1373 | bfd_false}, | |
1374 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
1375 | _bfd_write_archive_contents, bfd_false}, | |
1376 | ||
1377 | BFD_JUMP_TABLE_GENERIC (coff), | |
1378 | BFD_JUMP_TABLE_COPY (coff), | |
1379 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
1380 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
1381 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
1382 | BFD_JUMP_TABLE_RELOCS (coff), | |
1383 | BFD_JUMP_TABLE_WRITE (coff), | |
1384 | BFD_JUMP_TABLE_LINK (coff), | |
1385 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
1386 | ||
1387 | COFF_SWAP_TABLE, | |
1388 | }; |