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1 | /* BFD back-end for WDC 65816 COFF binaries. |
2 | Copyright 1995, 96, 1997 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 "libbfd.h" | |
24 | #include "bfdlink.h" | |
25 | #include "coff/w65.h" | |
26 | #include "coff/internal.h" | |
27 | #include "libcoff.h" | |
28 | ||
29 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1) | |
30 | static reloc_howto_type howto_table[] = | |
31 | { | |
32 | HOWTO (R_W65_ABS8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "abs8", true, 0x000000ff, 0x000000ff, false), | |
33 | HOWTO (R_W65_ABS16, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, "abs16", true, 0x0000ffff, 0x0000ffff, false), | |
34 | HOWTO (R_W65_ABS24, 0, 2, 32, false, 0, complain_overflow_bitfield, 0, "abs24", true, 0x00ffffff, 0x00ffffff, false), | |
35 | HOWTO (R_W65_ABS8S8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, ">abs8", true, 0x000000ff, 0x000000ff, false), | |
36 | HOWTO (R_W65_ABS8S16, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "^abs8", true, 0x000000ff, 0x000000ff, false), | |
37 | HOWTO (R_W65_ABS16S8, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, ">abs16", true, 0x0000ffff, 0x0000ffff, false), | |
38 | HOWTO (R_W65_ABS16S16,1, 0, 16, false, 0, complain_overflow_bitfield, 0, "^abs16", true, 0x0000ffff, 0x0000ffff, false), | |
39 | HOWTO (R_W65_PCR8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "pcrel8", true, 0x000000ff, 0x000000ff, true), | |
40 | HOWTO (R_W65_PCR16, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, "pcrel16", true, 0x0000ffff, 0x0000ffff, true), | |
41 | HOWTO (R_W65_DP, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "dp", true, 0x000000ff, 0x000000ff, false), | |
42 | ||
43 | }; | |
44 | ||
45 | ||
46 | /* Turn a howto into a reloc number */ | |
47 | ||
48 | #define SELECT_RELOC(x,howto) \ | |
49 | { x.r_type = select_reloc(howto); } | |
50 | ||
51 | #define BADMAG(x) (W65BADMAG(x)) | |
52 | #define W65 1 /* Customize coffcode.h */ | |
53 | #define __A_MAGIC_SET__ | |
54 | ||
55 | ||
56 | /* Code to swap in the reloc */ | |
57 | #define SWAP_IN_RELOC_OFFSET bfd_h_get_32 | |
58 | #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32 | |
59 | #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ | |
60 | dst->r_stuff[0] = 'S'; \ | |
61 | dst->r_stuff[1] = 'C'; | |
62 | ||
63 | ||
64 | static int | |
65 | select_reloc (howto) | |
66 | reloc_howto_type *howto; | |
67 | { | |
68 | return howto->type ; | |
69 | } | |
70 | ||
71 | /* Code to turn a r_type into a howto ptr, uses the above howto table | |
72 | */ | |
73 | ||
74 | static void | |
75 | rtype2howto (internal, dst) | |
76 | arelent *internal; | |
77 | struct internal_reloc *dst; | |
78 | { | |
79 | internal->howto = howto_table + dst->r_type - 1; | |
80 | } | |
81 | ||
82 | #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry) | |
83 | ||
84 | ||
85 | /* Perform any necessary magic to the addend in a reloc entry */ | |
86 | ||
87 | ||
88 | #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \ | |
89 | cache_ptr->addend = ext_reloc.r_offset; | |
90 | ||
91 | ||
92 | #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ | |
93 | reloc_processing(relent, reloc, symbols, abfd, section) | |
94 | ||
95 | static void | |
96 | reloc_processing (relent, reloc, symbols, abfd, section) | |
97 | arelent * relent; | |
98 | struct internal_reloc *reloc; | |
99 | asymbol ** symbols; | |
100 | bfd * abfd; | |
101 | asection * section; | |
102 | { | |
103 | relent->address = reloc->r_vaddr; | |
104 | rtype2howto (relent, reloc); | |
105 | ||
106 | if (((int) reloc->r_symndx) > 0) | |
107 | { | |
108 | relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; | |
109 | } | |
110 | else | |
111 | { | |
112 | relent->sym_ptr_ptr = (asymbol **)&(bfd_abs_symbol); | |
113 | } | |
114 | ||
115 | ||
116 | ||
117 | relent->addend = reloc->r_offset; | |
118 | ||
119 | relent->address -= section->vma; | |
120 | /* relent->section = 0;*/ | |
121 | } | |
122 | ||
123 | ||
124 | static int | |
125 | h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info) | |
126 | bfd *abfd; | |
127 | asection *input_section; | |
128 | arelent *reloc; | |
129 | unsigned int shrink; | |
130 | struct bfd_link_info *link_info; | |
131 | { | |
132 | bfd_vma value; | |
133 | bfd_vma dot; | |
134 | bfd_vma gap; | |
135 | ||
136 | /* The address of the thing to be relocated will have moved back by | |
137 | the size of the shrink - but we don't change reloc->address here, | |
138 | since we need it to know where the relocation lives in the source | |
139 | uncooked section */ | |
140 | ||
141 | /* reloc->address -= shrink; conceptual */ | |
142 | ||
143 | bfd_vma address = reloc->address - shrink; | |
144 | ||
145 | ||
146 | switch (reloc->howto->type) | |
147 | { | |
148 | case R_MOV16B2: | |
149 | case R_JMP2: | |
150 | shrink+=2; | |
151 | break; | |
152 | ||
153 | /* Thing is a move one byte */ | |
154 | case R_MOV16B1: | |
155 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
156 | ||
157 | if (value >= 0xff00) | |
158 | { | |
159 | ||
160 | /* Change the reloc type from 16bit, possible 8 to 8bit | |
161 | possible 16 */ | |
162 | reloc->howto = reloc->howto + 1; | |
163 | /* The place to relc moves back by one */ | |
164 | /* This will be two bytes smaller in the long run */ | |
165 | shrink +=2 ; | |
166 | bfd_perform_slip(abfd, 2, input_section, address); | |
167 | } | |
168 | ||
169 | break; | |
170 | /* This is the 24 bit branch which could become an 8 bitter, | |
171 | the relocation points to the first byte of the insn, not the | |
172 | actual data */ | |
173 | ||
174 | case R_JMPL1: | |
175 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
176 | ||
177 | dot = input_section->output_section->vma + | |
178 | input_section->output_offset + address; | |
179 | ||
180 | /* See if the address we're looking at within 127 bytes of where | |
181 | we are, if so then we can use a small branch rather than the | |
182 | jump we were going to */ | |
183 | ||
184 | gap = value - dot ; | |
185 | ||
186 | if (-120 < (long)gap && (long)gap < 120 ) | |
187 | { | |
188 | ||
189 | /* Change the reloc type from 24bit, possible 8 to 8bit | |
190 | possible 32 */ | |
191 | reloc->howto = reloc->howto + 1; | |
192 | /* This will be two bytes smaller in the long run */ | |
193 | shrink +=2 ; | |
194 | bfd_perform_slip(abfd, 2, input_section, address); | |
195 | } | |
196 | break; | |
197 | ||
198 | case R_JMP1: | |
199 | ||
200 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
201 | ||
202 | dot = input_section->output_section->vma + | |
203 | input_section->output_offset + address; | |
204 | ||
205 | /* See if the address we're looking at within 127 bytes of where | |
206 | we are, if so then we can use a small branch rather than the | |
207 | jump we were going to */ | |
208 | ||
209 | gap = value - (dot - shrink); | |
210 | ||
211 | ||
212 | if (-120 < (long)gap && (long)gap < 120 ) | |
213 | { | |
214 | ||
215 | /* Change the reloc type from 16bit, possible 8 to 8bit | |
216 | possible 16 */ | |
217 | reloc->howto = reloc->howto + 1; | |
218 | /* The place to relc moves back by one */ | |
219 | ||
220 | /* This will be two bytes smaller in the long run */ | |
221 | shrink +=2 ; | |
222 | bfd_perform_slip(abfd, 2, input_section, address); | |
223 | } | |
224 | break; | |
225 | } | |
226 | ||
227 | ||
228 | return shrink; | |
229 | } | |
230 | ||
231 | ||
232 | /* First phase of a relaxing link */ | |
233 | ||
234 | /* Reloc types | |
235 | large small | |
236 | R_MOV16B1 R_MOV16B2 mov.b with 16bit or 8 bit address | |
237 | R_JMP1 R_JMP2 jmp or pcrel branch | |
238 | R_JMPL1 R_JMPL_B8 24jmp or pcrel branch | |
239 | R_MOV24B1 R_MOV24B2 24 or 8 bit reloc for mov.b | |
240 | ||
241 | */ | |
242 | ||
243 | static void | |
244 | h8300_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr, | |
245 | dst_ptr) | |
246 | bfd *abfd; | |
247 | struct bfd_link_info *link_info; | |
248 | struct bfd_link_order *link_order; | |
249 | arelent *reloc; | |
250 | bfd_byte *data; | |
251 | unsigned int *src_ptr; | |
252 | unsigned int *dst_ptr; | |
253 | { | |
254 | unsigned int src_address = *src_ptr; | |
255 | unsigned int dst_address = *dst_ptr; | |
256 | asection *input_section = link_order->u.indirect.section; | |
257 | ||
258 | switch (reloc->howto->type) | |
259 | { | |
260 | case R_W65_ABS8: | |
261 | case R_W65_DP: | |
262 | { | |
263 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
264 | input_section); | |
265 | bfd_put_8 (abfd, gap, data + dst_address); | |
266 | dst_address += 1; | |
267 | src_address += 1; | |
268 | } | |
269 | break; | |
270 | ||
271 | case R_W65_ABS8S8: | |
272 | { | |
273 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
274 | input_section); | |
275 | gap >>= 8; | |
276 | bfd_put_8 (abfd, gap, data + dst_address); | |
277 | dst_address += 1; | |
278 | src_address += 1; | |
279 | } | |
280 | break; | |
281 | ||
282 | case R_W65_ABS8S16: | |
283 | { | |
284 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
285 | input_section); | |
286 | gap >>=16; | |
287 | bfd_put_8 (abfd, gap, data + dst_address); | |
288 | dst_address += 1; | |
289 | src_address += 1; | |
290 | } | |
291 | break; | |
292 | ||
293 | case R_W65_ABS16: | |
294 | { | |
295 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
296 | input_section); | |
297 | ||
298 | bfd_put_16 (abfd, gap, data + dst_address); | |
299 | dst_address += 2; | |
300 | src_address += 2; | |
301 | } | |
302 | break; | |
303 | case R_W65_ABS16S8: | |
304 | { | |
305 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
306 | input_section); | |
307 | gap >>= 8; | |
308 | bfd_put_16 (abfd, gap, data + dst_address); | |
309 | dst_address += 2; | |
310 | src_address += 2; | |
311 | } | |
312 | break; | |
313 | case R_W65_ABS16S16: | |
314 | { | |
315 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
316 | input_section); | |
317 | gap >>= 16; | |
318 | bfd_put_16 (abfd, gap, data + dst_address); | |
319 | dst_address += 2; | |
320 | src_address += 2; | |
321 | } | |
322 | break; | |
323 | ||
324 | case R_W65_ABS24: | |
325 | { | |
326 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
327 | input_section); | |
328 | bfd_put_16 (abfd, gap, data + dst_address); | |
329 | bfd_put_8 (abfd, gap>>16, data+dst_address+2); | |
330 | dst_address += 3; | |
331 | src_address += 3; | |
332 | } | |
333 | break; | |
334 | ||
335 | case R_W65_PCR8: | |
336 | { | |
337 | int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
338 | input_section); | |
339 | bfd_vma dot = link_order->offset | |
340 | + dst_address | |
341 | + link_order->u.indirect.section->output_section->vma; | |
342 | ||
343 | gap -= dot + 1; | |
344 | if (gap < -128 || gap > 127) { | |
345 | if (! ((*link_info->callbacks->reloc_overflow) | |
346 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
347 | reloc->howto->name, reloc->addend, input_section->owner, | |
348 | input_section, reloc->address))) | |
349 | abort(); | |
350 | } | |
351 | bfd_put_8 (abfd, gap, data + dst_address); | |
352 | dst_address += 1; | |
353 | src_address += 1; | |
354 | } | |
355 | break; | |
356 | ||
357 | case R_W65_PCR16: | |
358 | { | |
359 | bfd_vma gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
360 | input_section); | |
361 | bfd_vma dot = link_order->offset | |
362 | + dst_address | |
363 | + link_order->u.indirect.section->output_section->vma; | |
364 | ||
365 | ||
366 | /* This wraps within the page, so ignore the relativeness, look at the | |
367 | high part */ | |
368 | if ((gap & 0xf0000) != (dot & 0xf0000)) { | |
369 | if (! ((*link_info->callbacks->reloc_overflow) | |
370 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
371 | reloc->howto->name, reloc->addend, input_section->owner, | |
372 | input_section, reloc->address))) | |
373 | abort(); | |
374 | } | |
375 | ||
376 | gap -= dot + 2; | |
377 | bfd_put_16 (abfd, gap, data + dst_address); | |
378 | dst_address += 2; | |
379 | src_address += 2; | |
380 | } | |
381 | break; | |
382 | default: | |
383 | printf(_("ignoring reloc %s\n"), reloc->howto->name); | |
384 | break; | |
385 | ||
386 | } | |
387 | *src_ptr = src_address; | |
388 | *dst_ptr = dst_address; | |
389 | ||
390 | } | |
391 | ||
392 | #define coff_reloc16_extra_cases h8300_reloc16_extra_cases | |
393 | #define coff_reloc16_estimate h8300_reloc16_estimate | |
394 | ||
395 | #include "coffcode.h" | |
396 | ||
397 | ||
398 | #undef coff_bfd_get_relocated_section_contents | |
399 | #undef coff_bfd_relax_section | |
400 | #define coff_bfd_get_relocated_section_contents \ | |
401 | bfd_coff_reloc16_get_relocated_section_contents | |
402 | #define coff_bfd_relax_section bfd_coff_reloc16_relax_section | |
403 | ||
404 | ||
405 | ||
406 | bfd_target w65_vec = | |
407 | { | |
408 | "coff-w65", /* name */ | |
409 | bfd_target_coff_flavour, | |
410 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
411 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
412 | ||
413 | (HAS_RELOC | EXEC_P | /* object flags */ | |
414 | HAS_LINENO | HAS_DEBUG | | |
415 | HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ), | |
416 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
417 | '_', /* leading char */ | |
418 | '/', /* ar_pad_char */ | |
419 | 15, /* ar_max_namelen */ | |
420 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
421 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
422 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
423 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
424 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
425 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
426 | ||
427 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ | |
428 | bfd_generic_archive_p, _bfd_dummy_target}, | |
429 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ | |
430 | bfd_false}, | |
431 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
432 | _bfd_write_archive_contents, bfd_false}, | |
433 | ||
434 | BFD_JUMP_TABLE_GENERIC (coff), | |
435 | BFD_JUMP_TABLE_COPY (coff), | |
436 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
437 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
438 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
439 | BFD_JUMP_TABLE_RELOCS (coff), | |
440 | BFD_JUMP_TABLE_WRITE (coff), | |
441 | BFD_JUMP_TABLE_LINK (coff), | |
442 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
443 | ||
444 | COFF_SWAP_TABLE, | |
445 | }; |