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1 | /* BFD back-end for WDC 65816 COFF binaries. |
2 | Copyright 1995 Free Software Foundation, Inc. | |
3 | Written by Steve Chamberlain, <[email protected]>. | |
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 "obstack.h" | |
24 | #include "libbfd.h" | |
25 | #include "bfdlink.h" | |
26 | #include "coff/w65.h" | |
27 | #include "coff/internal.h" | |
28 | #include "libcoff.h" | |
29 | ||
30 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1) | |
31 | static reloc_howto_type howto_table[] = | |
32 | { | |
33 | HOWTO (R_W65_ABS8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "abs8", true, 0x000000ff, 0x000000ff, false), | |
34 | HOWTO (R_W65_ABS16, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, "abs16", true, 0x0000ffff, 0x0000ffff, false), | |
35 | HOWTO (R_W65_ABS24, 0, 2, 32, false, 0, complain_overflow_bitfield, 0, "abs24", true, 0x00ffffff, 0x00ffffff, false), | |
36 | HOWTO (R_W65_ABS8S8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, ">abs8", true, 0x000000ff, 0x000000ff, false), | |
37 | HOWTO (R_W65_ABS8S16, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "^abs8", true, 0x000000ff, 0x000000ff, false), | |
38 | HOWTO (R_W65_ABS16S8, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, ">abs16", true, 0x0000ffff, 0x0000ffff, false), | |
39 | HOWTO (R_W65_ABS16S16,1, 0, 16, false, 0, complain_overflow_bitfield, 0, "^abs16", true, 0x0000ffff, 0x0000ffff, false), | |
40 | HOWTO (R_W65_PCR8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "pcrel8", true, 0x000000ff, 0x000000ff, true), | |
41 | HOWTO (R_W65_PCR16, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, "pcrel16", true, 0x0000ffff, 0x0000ffff, true), | |
42 | HOWTO (R_W65_DP, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "dp", true, 0x000000ff, 0x000000ff, false), | |
43 | ||
44 | }; | |
45 | ||
46 | ||
47 | /* Turn a howto into a reloc number */ | |
48 | ||
49 | #define SELECT_RELOC(x,howto) \ | |
50 | { x.r_type = select_reloc(howto); } | |
51 | ||
52 | #define BADMAG(x) (W65BADMAG(x)) | |
53 | #define W65 1 /* Customize coffcode.h */ | |
54 | #define __A_MAGIC_SET__ | |
55 | ||
56 | ||
57 | /* Code to swap in the reloc */ | |
58 | #define SWAP_IN_RELOC_OFFSET bfd_h_get_32 | |
59 | #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32 | |
60 | #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ | |
61 | dst->r_stuff[0] = 'S'; \ | |
62 | dst->r_stuff[1] = 'C'; | |
63 | ||
64 | ||
65 | static int | |
66 | select_reloc (howto) | |
67 | reloc_howto_type *howto; | |
68 | { | |
69 | return howto->type ; | |
70 | } | |
71 | ||
72 | /* Code to turn a r_type into a howto ptr, uses the above howto table | |
73 | */ | |
74 | ||
75 | static void | |
76 | rtype2howto (internal, dst) | |
77 | arelent *internal; | |
78 | struct internal_reloc *dst; | |
79 | { | |
80 | internal->howto = howto_table + dst->r_type - 1; | |
81 | } | |
82 | ||
83 | #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry) | |
84 | ||
85 | ||
86 | /* Perform any necessaru magic to the addend in a reloc entry */ | |
87 | ||
88 | ||
89 | #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \ | |
90 | cache_ptr->addend = ext_reloc.r_offset; | |
91 | ||
92 | ||
93 | #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ | |
94 | reloc_processing(relent, reloc, symbols, abfd, section) | |
95 | ||
96 | static void | |
97 | reloc_processing (relent, reloc, symbols, abfd, section) | |
98 | arelent * relent; | |
99 | struct internal_reloc *reloc; | |
100 | asymbol ** symbols; | |
101 | bfd * abfd; | |
102 | asection * section; | |
103 | { | |
104 | relent->address = reloc->r_vaddr; | |
105 | rtype2howto (relent, reloc); | |
106 | ||
107 | if (((int) reloc->r_symndx) > 0) | |
108 | { | |
109 | relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; | |
110 | } | |
111 | else | |
112 | { | |
113 | relent->sym_ptr_ptr = (asymbol **)&(bfd_abs_symbol); | |
114 | } | |
115 | ||
116 | ||
117 | ||
118 | relent->addend = reloc->r_offset; | |
119 | ||
120 | relent->address -= section->vma; | |
121 | /* relent->section = 0;*/ | |
122 | } | |
123 | ||
124 | ||
125 | static int | |
126 | h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info) | |
127 | bfd *abfd; | |
128 | asection *input_section; | |
129 | arelent *reloc; | |
130 | unsigned int shrink; | |
131 | struct bfd_link_info *link_info; | |
132 | { | |
133 | bfd_vma value; | |
134 | bfd_vma dot; | |
135 | bfd_vma gap; | |
136 | ||
137 | /* The address of the thing to be relocated will have moved back by | |
138 | the size of the shrink - but we don't change reloc->address here, | |
139 | since we need it to know where the relocation lives in the source | |
140 | uncooked section */ | |
141 | ||
142 | /* reloc->address -= shrink; conceptual */ | |
143 | ||
144 | bfd_vma address = reloc->address - shrink; | |
145 | ||
146 | ||
147 | switch (reloc->howto->type) | |
148 | { | |
149 | case R_MOVB2: | |
150 | case R_JMP2: | |
151 | shrink+=2; | |
152 | break; | |
153 | ||
154 | /* Thing is a move one byte */ | |
155 | case R_MOVB1: | |
156 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
157 | ||
158 | if (value >= 0xff00) | |
159 | { | |
160 | ||
161 | /* Change the reloc type from 16bit, possible 8 to 8bit | |
162 | possible 16 */ | |
163 | reloc->howto = reloc->howto + 1; | |
164 | /* The place to relc moves back by one */ | |
165 | /* This will be two bytes smaller in the long run */ | |
166 | shrink +=2 ; | |
167 | bfd_perform_slip(abfd, 2, input_section, address); | |
168 | } | |
169 | ||
170 | break; | |
171 | /* This is the 24 bit branch which could become an 8 bitter, | |
172 | the relocation points to the first byte of the insn, not the | |
173 | actual data */ | |
174 | ||
175 | case R_JMPL1: | |
176 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
177 | ||
178 | dot = input_section->output_section->vma + | |
179 | input_section->output_offset + address; | |
180 | ||
181 | /* See if the address we're looking at within 127 bytes of where | |
182 | we are, if so then we can use a small branch rather than the | |
183 | jump we were going to */ | |
184 | ||
185 | gap = value - dot ; | |
186 | ||
187 | if (-120 < (long)gap && (long)gap < 120 ) | |
188 | { | |
189 | ||
190 | /* Change the reloc type from 24bit, possible 8 to 8bit | |
191 | possible 32 */ | |
192 | reloc->howto = reloc->howto + 1; | |
193 | /* This will be two bytes smaller in the long run */ | |
194 | shrink +=2 ; | |
195 | bfd_perform_slip(abfd, 2, input_section, address); | |
196 | } | |
197 | break; | |
198 | ||
199 | case R_JMP1: | |
200 | ||
201 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
202 | ||
203 | dot = input_section->output_section->vma + | |
204 | input_section->output_offset + address; | |
205 | ||
206 | /* See if the address we're looking at within 127 bytes of where | |
207 | we are, if so then we can use a small branch rather than the | |
208 | jump we were going to */ | |
209 | ||
210 | gap = value - (dot - shrink); | |
211 | ||
212 | ||
213 | if (-120 < (long)gap && (long)gap < 120 ) | |
214 | { | |
215 | ||
216 | /* Change the reloc type from 16bit, possible 8 to 8bit | |
217 | possible 16 */ | |
218 | reloc->howto = reloc->howto + 1; | |
219 | /* The place to relc moves back by one */ | |
220 | ||
221 | /* This will be two bytes smaller in the long run */ | |
222 | shrink +=2 ; | |
223 | bfd_perform_slip(abfd, 2, input_section, address); | |
224 | } | |
225 | break; | |
226 | } | |
227 | ||
228 | ||
229 | return shrink; | |
230 | } | |
231 | ||
232 | ||
233 | /* First phase of a relaxing link */ | |
234 | ||
235 | /* Reloc types | |
236 | large small | |
237 | R_MOVB1 R_MOVB2 mov.b with 16bit or 8 bit address | |
238 | R_JMP1 R_JMP2 jmp or pcrel branch | |
239 | R_JMPL1 R_JMPL_B8 24jmp or pcrel branch | |
240 | R_MOVLB1 R_MOVLB2 24 or 8 bit reloc for mov.b | |
241 | ||
242 | */ | |
243 | ||
244 | static void | |
245 | h8300_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr, | |
246 | dst_ptr) | |
247 | bfd *abfd; | |
248 | struct bfd_link_info *link_info; | |
249 | struct bfd_link_order *link_order; | |
250 | arelent *reloc; | |
251 | bfd_byte *data; | |
252 | unsigned int *src_ptr; | |
253 | unsigned int *dst_ptr; | |
254 | { | |
255 | unsigned int src_address = *src_ptr; | |
256 | unsigned int dst_address = *dst_ptr; | |
257 | asection *input_section = link_order->u.indirect.section; | |
258 | ||
259 | switch (reloc->howto->type) | |
260 | { | |
261 | case R_W65_ABS8: | |
262 | case R_W65_DP: | |
263 | { | |
264 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
265 | input_section); | |
266 | bfd_put_8 (abfd, gap, data + dst_address); | |
267 | dst_address += 1; | |
268 | src_address += 1; | |
269 | } | |
270 | break; | |
271 | ||
272 | case R_W65_ABS8S8: | |
273 | { | |
274 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
275 | input_section); | |
276 | gap >>= 8; | |
277 | bfd_put_8 (abfd, gap, data + dst_address); | |
278 | dst_address += 1; | |
279 | src_address += 1; | |
280 | } | |
281 | break; | |
282 | ||
283 | case R_W65_ABS8S16: | |
284 | { | |
285 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
286 | input_section); | |
287 | gap >>=16; | |
288 | bfd_put_8 (abfd, gap, data + dst_address); | |
289 | dst_address += 1; | |
290 | src_address += 1; | |
291 | } | |
292 | break; | |
293 | ||
294 | case R_W65_ABS16: | |
295 | { | |
296 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
297 | input_section); | |
298 | ||
299 | bfd_put_16 (abfd, gap, data + dst_address); | |
300 | dst_address += 2; | |
301 | src_address += 2; | |
302 | } | |
303 | break; | |
304 | case R_W65_ABS16S8: | |
305 | { | |
306 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
307 | input_section); | |
308 | gap >>= 8; | |
309 | bfd_put_16 (abfd, gap, data + dst_address); | |
310 | dst_address += 2; | |
311 | src_address += 2; | |
312 | } | |
313 | break; | |
314 | case R_W65_ABS16S16: | |
315 | { | |
316 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
317 | input_section); | |
318 | gap >>= 16; | |
319 | bfd_put_16 (abfd, gap, data + dst_address); | |
320 | dst_address += 2; | |
321 | src_address += 2; | |
322 | } | |
323 | break; | |
324 | ||
325 | case R_W65_ABS24: | |
326 | { | |
327 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
328 | input_section); | |
329 | bfd_put_16 (abfd, gap, data + dst_address); | |
330 | bfd_put_8 (abfd, gap>>16, data+dst_address+2); | |
331 | dst_address += 3; | |
332 | src_address += 3; | |
333 | } | |
334 | break; | |
335 | ||
336 | case R_W65_PCR8: | |
337 | { | |
338 | int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
339 | input_section); | |
340 | bfd_vma dot = link_order->offset | |
341 | + dst_address | |
342 | + link_order->u.indirect.section->output_section->vma; | |
343 | ||
344 | gap -= dot + 1; | |
345 | if (gap < -128 || gap > 127) { | |
346 | if (! ((*link_info->callbacks->reloc_overflow) | |
347 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
348 | reloc->howto->name, reloc->addend, input_section->owner, | |
349 | input_section, reloc->address))) | |
350 | abort(); | |
351 | } | |
352 | bfd_put_8 (abfd, gap, data + dst_address); | |
353 | dst_address += 1; | |
354 | src_address += 1; | |
355 | } | |
356 | break; | |
357 | ||
358 | case R_W65_PCR16: | |
359 | { | |
360 | bfd_vma gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
361 | input_section); | |
362 | bfd_vma dot = link_order->offset | |
363 | + dst_address | |
364 | + link_order->u.indirect.section->output_section->vma; | |
365 | ||
366 | ||
367 | /* This wraps within the page, so ignore the relativeness, look at the | |
368 | high part */ | |
369 | if ((gap & 0xf0000) != (dot & 0xf0000)) { | |
370 | if (! ((*link_info->callbacks->reloc_overflow) | |
371 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
372 | reloc->howto->name, reloc->addend, input_section->owner, | |
373 | input_section, reloc->address))) | |
374 | abort(); | |
375 | } | |
376 | ||
377 | gap -= dot + 2; | |
378 | bfd_put_16 (abfd, gap, data + dst_address); | |
379 | dst_address += 2; | |
380 | src_address += 2; | |
381 | } | |
382 | break; | |
383 | default: | |
384 | printf("ignoring reloc %s\n", reloc->howto->name); | |
385 | break; | |
386 | ||
387 | } | |
388 | *src_ptr = src_address; | |
389 | *dst_ptr = dst_address; | |
390 | ||
391 | } | |
392 | ||
393 | #define coff_reloc16_extra_cases h8300_reloc16_extra_cases | |
394 | #define coff_reloc16_estimate h8300_reloc16_estimate | |
395 | ||
396 | #include "coffcode.h" | |
397 | ||
398 | ||
399 | #undef coff_bfd_get_relocated_section_contents | |
400 | #undef coff_bfd_relax_section | |
401 | #define coff_bfd_get_relocated_section_contents \ | |
402 | bfd_coff_reloc16_get_relocated_section_contents | |
403 | #define coff_bfd_relax_section bfd_coff_reloc16_relax_section | |
404 | ||
405 | ||
406 | ||
407 | bfd_target w65_vec = | |
408 | { | |
409 | "coff-w65", /* name */ | |
410 | bfd_target_coff_flavour, | |
411 | false, /* data byte order is big */ | |
412 | false, /* header byte order is big */ | |
413 | ||
414 | (HAS_RELOC | EXEC_P | /* object flags */ | |
415 | HAS_LINENO | HAS_DEBUG | | |
416 | HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ), | |
417 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
418 | '_', /* leading char */ | |
419 | '/', /* ar_pad_char */ | |
420 | 15, /* ar_max_namelen */ | |
421 | 1, /* minimum section alignment */ | |
422 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
423 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
424 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
425 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
426 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
427 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
428 | ||
429 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ | |
430 | bfd_generic_archive_p, _bfd_dummy_target}, | |
431 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ | |
432 | bfd_false}, | |
433 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
434 | _bfd_write_archive_contents, bfd_false}, | |
435 | ||
436 | BFD_JUMP_TABLE_GENERIC (coff), | |
437 | BFD_JUMP_TABLE_COPY (coff), | |
438 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
439 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
440 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
441 | BFD_JUMP_TABLE_RELOCS (coff), | |
442 | BFD_JUMP_TABLE_WRITE (coff), | |
443 | BFD_JUMP_TABLE_LINK (coff), | |
444 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
445 | ||
446 | COFF_SWAP_TABLE, | |
447 | }; |