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252b5132 | 1 | /* BFD back-end for WDC 65816 COFF binaries. |
7898deda | 2 | Copyright 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc. |
252b5132 RH |
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 "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 | ||
252b5132 RH |
45 | /* Turn a howto into a reloc number */ |
46 | ||
47 | #define SELECT_RELOC(x,howto) \ | |
48 | { x.r_type = select_reloc(howto); } | |
49 | ||
50 | #define BADMAG(x) (W65BADMAG(x)) | |
51 | #define W65 1 /* Customize coffcode.h */ | |
52 | #define __A_MAGIC_SET__ | |
53 | ||
252b5132 RH |
54 | /* Code to swap in the reloc */ |
55 | #define SWAP_IN_RELOC_OFFSET bfd_h_get_32 | |
56 | #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32 | |
57 | #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ | |
58 | dst->r_stuff[0] = 'S'; \ | |
59 | dst->r_stuff[1] = 'C'; | |
60 | ||
252b5132 RH |
61 | static int |
62 | select_reloc (howto) | |
63 | reloc_howto_type *howto; | |
64 | { | |
65 | return howto->type ; | |
66 | } | |
67 | ||
68 | /* Code to turn a r_type into a howto ptr, uses the above howto table | |
69 | */ | |
70 | ||
71 | static void | |
72 | rtype2howto (internal, dst) | |
73 | arelent *internal; | |
74 | struct internal_reloc *dst; | |
75 | { | |
76 | internal->howto = howto_table + dst->r_type - 1; | |
77 | } | |
78 | ||
79 | #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry) | |
80 | ||
252b5132 RH |
81 | /* Perform any necessary magic to the addend in a reloc entry */ |
82 | ||
252b5132 RH |
83 | #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \ |
84 | cache_ptr->addend = ext_reloc.r_offset; | |
85 | ||
252b5132 RH |
86 | #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ |
87 | reloc_processing(relent, reloc, symbols, abfd, section) | |
88 | ||
89 | static void | |
90 | reloc_processing (relent, reloc, symbols, abfd, section) | |
91 | arelent * relent; | |
92 | struct internal_reloc *reloc; | |
93 | asymbol ** symbols; | |
94 | bfd * abfd; | |
95 | asection * section; | |
96 | { | |
97 | relent->address = reloc->r_vaddr; | |
98 | rtype2howto (relent, reloc); | |
99 | ||
100 | if (((int) reloc->r_symndx) > 0) | |
101 | { | |
102 | relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; | |
103 | } | |
104 | else | |
105 | { | |
106 | relent->sym_ptr_ptr = (asymbol **)&(bfd_abs_symbol); | |
107 | } | |
108 | ||
252b5132 RH |
109 | relent->addend = reloc->r_offset; |
110 | ||
111 | relent->address -= section->vma; | |
112 | /* relent->section = 0;*/ | |
113 | } | |
114 | ||
252b5132 RH |
115 | static int |
116 | h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info) | |
117 | bfd *abfd; | |
118 | asection *input_section; | |
119 | arelent *reloc; | |
120 | unsigned int shrink; | |
121 | struct bfd_link_info *link_info; | |
122 | { | |
cbfe05c4 | 123 | bfd_vma value; |
252b5132 RH |
124 | bfd_vma dot; |
125 | bfd_vma gap; | |
126 | ||
cbfe05c4 | 127 | /* The address of the thing to be relocated will have moved back by |
252b5132 RH |
128 | the size of the shrink - but we don't change reloc->address here, |
129 | since we need it to know where the relocation lives in the source | |
130 | uncooked section */ | |
131 | ||
132 | /* reloc->address -= shrink; conceptual */ | |
133 | ||
134 | bfd_vma address = reloc->address - shrink; | |
252b5132 RH |
135 | |
136 | switch (reloc->howto->type) | |
cbfe05c4 | 137 | { |
252b5132 RH |
138 | case R_MOV16B2: |
139 | case R_JMP2: | |
140 | shrink+=2; | |
141 | break; | |
142 | ||
143 | /* Thing is a move one byte */ | |
144 | case R_MOV16B1: | |
145 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
146 | ||
147 | if (value >= 0xff00) | |
cbfe05c4 | 148 | { |
252b5132 RH |
149 | |
150 | /* Change the reloc type from 16bit, possible 8 to 8bit | |
151 | possible 16 */ | |
cbfe05c4 | 152 | reloc->howto = reloc->howto + 1; |
252b5132 RH |
153 | /* The place to relc moves back by one */ |
154 | /* This will be two bytes smaller in the long run */ | |
155 | shrink +=2 ; | |
156 | bfd_perform_slip(abfd, 2, input_section, address); | |
cbfe05c4 | 157 | } |
252b5132 RH |
158 | |
159 | break; | |
cbfe05c4 | 160 | /* This is the 24 bit branch which could become an 8 bitter, |
252b5132 RH |
161 | the relocation points to the first byte of the insn, not the |
162 | actual data */ | |
163 | ||
164 | case R_JMPL1: | |
165 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
cbfe05c4 | 166 | |
252b5132 RH |
167 | dot = input_section->output_section->vma + |
168 | input_section->output_offset + address; | |
cbfe05c4 | 169 | |
252b5132 RH |
170 | /* See if the address we're looking at within 127 bytes of where |
171 | we are, if so then we can use a small branch rather than the | |
172 | jump we were going to */ | |
173 | ||
174 | gap = value - dot ; | |
cbfe05c4 | 175 | |
252b5132 | 176 | if (-120 < (long)gap && (long)gap < 120 ) |
cbfe05c4 | 177 | { |
252b5132 RH |
178 | |
179 | /* Change the reloc type from 24bit, possible 8 to 8bit | |
180 | possible 32 */ | |
cbfe05c4 | 181 | reloc->howto = reloc->howto + 1; |
252b5132 RH |
182 | /* This will be two bytes smaller in the long run */ |
183 | shrink +=2 ; | |
184 | bfd_perform_slip(abfd, 2, input_section, address); | |
185 | } | |
186 | break; | |
187 | ||
188 | case R_JMP1: | |
189 | ||
190 | value = bfd_coff_reloc16_get_value(reloc, link_info, input_section); | |
cbfe05c4 | 191 | |
252b5132 RH |
192 | dot = input_section->output_section->vma + |
193 | input_section->output_offset + address; | |
cbfe05c4 | 194 | |
252b5132 RH |
195 | /* See if the address we're looking at within 127 bytes of where |
196 | we are, if so then we can use a small branch rather than the | |
197 | jump we were going to */ | |
198 | ||
199 | gap = value - (dot - shrink); | |
252b5132 RH |
200 | |
201 | if (-120 < (long)gap && (long)gap < 120 ) | |
cbfe05c4 | 202 | { |
252b5132 RH |
203 | |
204 | /* Change the reloc type from 16bit, possible 8 to 8bit | |
205 | possible 16 */ | |
cbfe05c4 | 206 | reloc->howto = reloc->howto + 1; |
252b5132 RH |
207 | /* The place to relc moves back by one */ |
208 | ||
209 | /* This will be two bytes smaller in the long run */ | |
210 | shrink +=2 ; | |
211 | bfd_perform_slip(abfd, 2, input_section, address); | |
212 | } | |
213 | break; | |
214 | } | |
215 | ||
252b5132 RH |
216 | return shrink; |
217 | } | |
218 | ||
252b5132 RH |
219 | /* First phase of a relaxing link */ |
220 | ||
221 | /* Reloc types | |
222 | large small | |
223 | R_MOV16B1 R_MOV16B2 mov.b with 16bit or 8 bit address | |
224 | R_JMP1 R_JMP2 jmp or pcrel branch | |
225 | R_JMPL1 R_JMPL_B8 24jmp or pcrel branch | |
226 | R_MOV24B1 R_MOV24B2 24 or 8 bit reloc for mov.b | |
227 | ||
228 | */ | |
229 | ||
230 | static void | |
231 | h8300_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr, | |
232 | dst_ptr) | |
233 | bfd *abfd; | |
234 | struct bfd_link_info *link_info; | |
235 | struct bfd_link_order *link_order; | |
236 | arelent *reloc; | |
237 | bfd_byte *data; | |
238 | unsigned int *src_ptr; | |
239 | unsigned int *dst_ptr; | |
240 | { | |
241 | unsigned int src_address = *src_ptr; | |
242 | unsigned int dst_address = *dst_ptr; | |
243 | asection *input_section = link_order->u.indirect.section; | |
244 | ||
245 | switch (reloc->howto->type) | |
246 | { | |
247 | case R_W65_ABS8: | |
248 | case R_W65_DP: | |
249 | { | |
250 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
251 | input_section); | |
252 | bfd_put_8 (abfd, gap, data + dst_address); | |
253 | dst_address += 1; | |
254 | src_address += 1; | |
255 | } | |
256 | break; | |
257 | ||
258 | case R_W65_ABS8S8: | |
259 | { | |
260 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
261 | input_section); | |
262 | gap >>= 8; | |
263 | bfd_put_8 (abfd, gap, data + dst_address); | |
264 | dst_address += 1; | |
265 | src_address += 1; | |
266 | } | |
267 | break; | |
268 | ||
269 | case R_W65_ABS8S16: | |
270 | { | |
271 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
272 | input_section); | |
273 | gap >>=16; | |
274 | bfd_put_8 (abfd, gap, data + dst_address); | |
275 | dst_address += 1; | |
276 | src_address += 1; | |
277 | } | |
278 | break; | |
279 | ||
280 | case R_W65_ABS16: | |
281 | { | |
282 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
283 | input_section); | |
284 | ||
285 | bfd_put_16 (abfd, gap, data + dst_address); | |
286 | dst_address += 2; | |
287 | src_address += 2; | |
288 | } | |
289 | break; | |
290 | case R_W65_ABS16S8: | |
291 | { | |
292 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
293 | input_section); | |
294 | gap >>= 8; | |
295 | bfd_put_16 (abfd, gap, data + dst_address); | |
296 | dst_address += 2; | |
297 | src_address += 2; | |
298 | } | |
299 | break; | |
300 | case R_W65_ABS16S16: | |
301 | { | |
302 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
303 | input_section); | |
304 | gap >>= 16; | |
305 | bfd_put_16 (abfd, gap, data + dst_address); | |
306 | dst_address += 2; | |
307 | src_address += 2; | |
308 | } | |
309 | break; | |
310 | ||
311 | case R_W65_ABS24: | |
312 | { | |
313 | unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
314 | input_section); | |
315 | bfd_put_16 (abfd, gap, data + dst_address); | |
316 | bfd_put_8 (abfd, gap>>16, data+dst_address+2); | |
317 | dst_address += 3; | |
318 | src_address += 3; | |
319 | } | |
320 | break; | |
321 | ||
322 | case R_W65_PCR8: | |
323 | { | |
324 | int gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
325 | input_section); | |
cbfe05c4 KH |
326 | bfd_vma dot = link_order->offset |
327 | + dst_address | |
252b5132 RH |
328 | + link_order->u.indirect.section->output_section->vma; |
329 | ||
330 | gap -= dot + 1; | |
331 | if (gap < -128 || gap > 127) { | |
332 | if (! ((*link_info->callbacks->reloc_overflow) | |
333 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
334 | reloc->howto->name, reloc->addend, input_section->owner, | |
335 | input_section, reloc->address))) | |
cbfe05c4 | 336 | abort (); |
252b5132 RH |
337 | } |
338 | bfd_put_8 (abfd, gap, data + dst_address); | |
339 | dst_address += 1; | |
340 | src_address += 1; | |
341 | } | |
342 | break; | |
343 | ||
344 | case R_W65_PCR16: | |
345 | { | |
346 | bfd_vma gap = bfd_coff_reloc16_get_value (reloc, link_info, | |
347 | input_section); | |
cbfe05c4 KH |
348 | bfd_vma dot = link_order->offset |
349 | + dst_address | |
252b5132 RH |
350 | + link_order->u.indirect.section->output_section->vma; |
351 | ||
252b5132 RH |
352 | /* This wraps within the page, so ignore the relativeness, look at the |
353 | high part */ | |
354 | if ((gap & 0xf0000) != (dot & 0xf0000)) { | |
355 | if (! ((*link_info->callbacks->reloc_overflow) | |
356 | (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
357 | reloc->howto->name, reloc->addend, input_section->owner, | |
358 | input_section, reloc->address))) | |
cbfe05c4 | 359 | abort (); |
252b5132 RH |
360 | } |
361 | ||
362 | gap -= dot + 2; | |
363 | bfd_put_16 (abfd, gap, data + dst_address); | |
364 | dst_address += 2; | |
365 | src_address += 2; | |
366 | } | |
367 | break; | |
368 | default: | |
6e301b2b | 369 | printf (_("ignoring reloc %s\n"), reloc->howto->name); |
252b5132 RH |
370 | break; |
371 | ||
372 | } | |
373 | *src_ptr = src_address; | |
374 | *dst_ptr = dst_address; | |
375 | ||
376 | } | |
377 | ||
378 | #define coff_reloc16_extra_cases h8300_reloc16_extra_cases | |
379 | #define coff_reloc16_estimate h8300_reloc16_estimate | |
380 | ||
381 | #include "coffcode.h" | |
382 | ||
252b5132 RH |
383 | #undef coff_bfd_get_relocated_section_contents |
384 | #undef coff_bfd_relax_section | |
385 | #define coff_bfd_get_relocated_section_contents \ | |
386 | bfd_coff_reloc16_get_relocated_section_contents | |
387 | #define coff_bfd_relax_section bfd_coff_reloc16_relax_section | |
388 | ||
371e71b8 | 389 | CREATE_LITTLE_COFF_TARGET_VEC (w65_vec, "coff-w65", BFD_IS_RELAXABLE, 0, '_', NULL) |