Commit | Line | Data |
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c2dcd04e | 1 | /* BFD back-end for Renesas H8/300 COFF binaries. |
7898deda | 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
f13a99db | 3 | 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
5f771d47 | 4 | Free Software Foundation, Inc. |
252b5132 RH |
5 | Written by Steve Chamberlain, <sac@cygnus.com>. |
6 | ||
e514ac71 | 7 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 8 | |
e514ac71 NC |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 11 | the Free Software Foundation; either version 3 of the License, or |
e514ac71 | 12 | (at your option) any later version. |
252b5132 | 13 | |
e514ac71 NC |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
252b5132 | 18 | |
e514ac71 NC |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
22 | MA 02110-1301, USA. */ | |
252b5132 | 23 | |
252b5132 | 24 | #include "sysdep.h" |
3db64b00 | 25 | #include "bfd.h" |
252b5132 RH |
26 | #include "libbfd.h" |
27 | #include "bfdlink.h" | |
28 | #include "genlink.h" | |
29 | #include "coff/h8300.h" | |
30 | #include "coff/internal.h" | |
31 | #include "libcoff.h" | |
0171ee92 | 32 | #include "libiberty.h" |
252b5132 RH |
33 | |
34 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1) | |
35 | ||
36 | /* We derive a hash table from the basic BFD hash table to | |
5fcfd273 | 37 | hold entries in the function vector. Aside from the |
252b5132 RH |
38 | info stored by the basic hash table, we need the offset |
39 | of a particular entry within the hash table as well as | |
40 | the offset where we'll add the next entry. */ | |
41 | ||
42 | struct funcvec_hash_entry | |
f4ffd778 NC |
43 | { |
44 | /* The basic hash table entry. */ | |
45 | struct bfd_hash_entry root; | |
252b5132 | 46 | |
f4ffd778 NC |
47 | /* The offset within the vectors section where |
48 | this entry lives. */ | |
49 | bfd_vma offset; | |
50 | }; | |
252b5132 RH |
51 | |
52 | struct funcvec_hash_table | |
f4ffd778 NC |
53 | { |
54 | /* The basic hash table. */ | |
55 | struct bfd_hash_table root; | |
252b5132 | 56 | |
f4ffd778 | 57 | bfd *abfd; |
252b5132 | 58 | |
f4ffd778 NC |
59 | /* Offset at which we'll add the next entry. */ |
60 | unsigned int offset; | |
61 | }; | |
252b5132 RH |
62 | |
63 | static struct bfd_hash_entry * | |
64 | funcvec_hash_newfunc | |
c6baf75e | 65 | (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); |
252b5132 | 66 | |
b34976b6 | 67 | static bfd_reloc_status_type special |
c6baf75e | 68 | (bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **); |
b34976b6 | 69 | static int select_reloc |
c6baf75e | 70 | (reloc_howto_type *); |
b34976b6 | 71 | static void rtype2howto |
c6baf75e | 72 | (arelent *, struct internal_reloc *); |
b34976b6 | 73 | static void reloc_processing |
c6baf75e | 74 | (arelent *, struct internal_reloc *, asymbol **, bfd *, asection *); |
b34976b6 | 75 | static bfd_boolean h8300_symbol_address_p |
c6baf75e | 76 | (bfd *, asection *, bfd_vma); |
b34976b6 | 77 | static int h8300_reloc16_estimate |
c6baf75e RS |
78 | (bfd *, asection *, arelent *, unsigned int, |
79 | struct bfd_link_info *); | |
b34976b6 | 80 | static void h8300_reloc16_extra_cases |
c6baf75e RS |
81 | (bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *, |
82 | bfd_byte *, unsigned int *, unsigned int *); | |
b34976b6 | 83 | static bfd_boolean h8300_bfd_link_add_symbols |
c6baf75e | 84 | (bfd *, struct bfd_link_info *); |
f4ffd778 | 85 | |
252b5132 RH |
86 | /* To lookup a value in the function vector hash table. */ |
87 | #define funcvec_hash_lookup(table, string, create, copy) \ | |
88 | ((struct funcvec_hash_entry *) \ | |
89 | bfd_hash_lookup (&(table)->root, (string), (create), (copy))) | |
90 | ||
91 | /* The derived h8300 COFF linker table. Note it's derived from | |
92 | the generic linker hash table, not the COFF backend linker hash | |
93 | table! We use this to attach additional data structures we | |
94 | need while linking on the h8300. */ | |
bc7eab72 | 95 | struct h8300_coff_link_hash_table { |
252b5132 RH |
96 | /* The main hash table. */ |
97 | struct generic_link_hash_table root; | |
98 | ||
99 | /* Section for the vectors table. This gets attached to a | |
100 | random input bfd, we keep it here for easy access. */ | |
101 | asection *vectors_sec; | |
102 | ||
103 | /* Hash table of the functions we need to enter into the function | |
104 | vector. */ | |
105 | struct funcvec_hash_table *funcvec_hash_table; | |
106 | }; | |
107 | ||
c6baf75e | 108 | static struct bfd_link_hash_table *h8300_coff_link_hash_table_create (bfd *); |
252b5132 RH |
109 | |
110 | /* Get the H8/300 COFF linker hash table from a link_info structure. */ | |
111 | ||
112 | #define h8300_coff_hash_table(p) \ | |
113 | ((struct h8300_coff_link_hash_table *) ((coff_hash_table (p)))) | |
114 | ||
115 | /* Initialize fields within a funcvec hash table entry. Called whenever | |
116 | a new entry is added to the funcvec hash table. */ | |
117 | ||
118 | static struct bfd_hash_entry * | |
c6baf75e RS |
119 | funcvec_hash_newfunc (struct bfd_hash_entry *entry, |
120 | struct bfd_hash_table *gen_table, | |
121 | const char *string) | |
252b5132 RH |
122 | { |
123 | struct funcvec_hash_entry *ret; | |
124 | struct funcvec_hash_table *table; | |
125 | ||
126 | ret = (struct funcvec_hash_entry *) entry; | |
127 | table = (struct funcvec_hash_table *) gen_table; | |
128 | ||
129 | /* Allocate the structure if it has not already been allocated by a | |
130 | subclass. */ | |
131 | if (ret == NULL) | |
132 | ret = ((struct funcvec_hash_entry *) | |
0171ee92 AM |
133 | bfd_hash_allocate (gen_table, |
134 | sizeof (struct funcvec_hash_entry))); | |
252b5132 RH |
135 | if (ret == NULL) |
136 | return NULL; | |
137 | ||
138 | /* Call the allocation method of the superclass. */ | |
139 | ret = ((struct funcvec_hash_entry *) | |
bc7eab72 | 140 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, gen_table, string)); |
252b5132 RH |
141 | |
142 | if (ret == NULL) | |
143 | return NULL; | |
144 | ||
145 | /* Note where this entry will reside in the function vector table. */ | |
146 | ret->offset = table->offset; | |
147 | ||
148 | /* Bump the offset at which we store entries in the function | |
149 | vector. We'd like to bump up the size of the vectors section, | |
150 | but it's not easily available here. */ | |
d4e2de6b NC |
151 | switch (bfd_get_mach (table->abfd)) |
152 | { | |
153 | case bfd_mach_h8300: | |
154 | case bfd_mach_h8300hn: | |
155 | case bfd_mach_h8300sn: | |
156 | table->offset += 2; | |
157 | break; | |
158 | case bfd_mach_h8300h: | |
159 | case bfd_mach_h8300s: | |
160 | table->offset += 4; | |
161 | break; | |
162 | default: | |
163 | return NULL; | |
164 | } | |
252b5132 RH |
165 | |
166 | /* Everything went OK. */ | |
167 | return (struct bfd_hash_entry *) ret; | |
168 | } | |
169 | ||
170 | /* Initialize the function vector hash table. */ | |
171 | ||
b34976b6 | 172 | static bfd_boolean |
c6baf75e RS |
173 | funcvec_hash_table_init (struct funcvec_hash_table *table, |
174 | bfd *abfd, | |
175 | struct bfd_hash_entry *(*newfunc) | |
176 | (struct bfd_hash_entry *, | |
177 | struct bfd_hash_table *, | |
66eb6687 AM |
178 | const char *), |
179 | unsigned int entsize) | |
252b5132 RH |
180 | { |
181 | /* Initialize our local fields, then call the generic initialization | |
182 | routine. */ | |
183 | table->offset = 0; | |
184 | table->abfd = abfd; | |
66eb6687 | 185 | return (bfd_hash_table_init (&table->root, newfunc, entsize)); |
252b5132 RH |
186 | } |
187 | ||
188 | /* Create the derived linker hash table. We use a derived hash table | |
19852a2a | 189 | basically to hold "static" information during an H8/300 coff link |
252b5132 RH |
190 | without using static variables. */ |
191 | ||
192 | static struct bfd_link_hash_table * | |
c6baf75e | 193 | h8300_coff_link_hash_table_create (bfd *abfd) |
252b5132 RH |
194 | { |
195 | struct h8300_coff_link_hash_table *ret; | |
dc810e39 AM |
196 | bfd_size_type amt = sizeof (struct h8300_coff_link_hash_table); |
197 | ||
e2d34d7d | 198 | ret = (struct h8300_coff_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
199 | if (ret == NULL) |
200 | return NULL; | |
dc810e39 | 201 | if (!_bfd_link_hash_table_init (&ret->root.root, abfd, |
66eb6687 AM |
202 | _bfd_generic_link_hash_newfunc, |
203 | sizeof (struct generic_link_hash_entry))) | |
252b5132 | 204 | { |
e2d34d7d | 205 | free (ret); |
252b5132 RH |
206 | return NULL; |
207 | } | |
208 | ||
209 | /* Initialize our data. */ | |
210 | ret->vectors_sec = NULL; | |
211 | ret->funcvec_hash_table = NULL; | |
212 | ||
2ab1486e | 213 | /* OK. Everything's initialized, return the base pointer. */ |
252b5132 RH |
214 | return &ret->root.root; |
215 | } | |
216 | ||
cc040812 | 217 | /* Special handling for H8/300 relocs. |
252b5132 RH |
218 | We only come here for pcrel stuff and return normally if not an -r link. |
219 | When doing -r, we can't do any arithmetic for the pcrel stuff, because | |
220 | the code in reloc.c assumes that we can manipulate the targets of | |
5fcfd273 | 221 | the pcrel branches. This isn't so, since the H8/300 can do relaxing, |
252b5132 | 222 | which means that the gap after the instruction may not be enough to |
d562d2fb | 223 | contain the offset required for the branch, so we have to use only |
cc040812 | 224 | the addend until the final link. */ |
252b5132 RH |
225 | |
226 | static bfd_reloc_status_type | |
c6baf75e RS |
227 | special (bfd *abfd ATTRIBUTE_UNUSED, |
228 | arelent *reloc_entry ATTRIBUTE_UNUSED, | |
229 | asymbol *symbol ATTRIBUTE_UNUSED, | |
230 | PTR data ATTRIBUTE_UNUSED, | |
231 | asection *input_section ATTRIBUTE_UNUSED, | |
232 | bfd *output_bfd, | |
233 | char **error_message ATTRIBUTE_UNUSED) | |
252b5132 RH |
234 | { |
235 | if (output_bfd == (bfd *) NULL) | |
236 | return bfd_reloc_continue; | |
237 | ||
d562d2fb AM |
238 | /* Adjust the reloc address to that in the output section. */ |
239 | reloc_entry->address += input_section->output_offset; | |
252b5132 RH |
240 | return bfd_reloc_ok; |
241 | } | |
242 | ||
bc7eab72 | 243 | static reloc_howto_type howto_table[] = { |
b34976b6 AM |
244 | HOWTO (R_RELBYTE, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, special, "8", FALSE, 0x000000ff, 0x000000ff, FALSE), |
245 | HOWTO (R_RELWORD, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, special, "16", FALSE, 0x0000ffff, 0x0000ffff, FALSE), | |
246 | HOWTO (R_RELLONG, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, special, "32", FALSE, 0xffffffff, 0xffffffff, FALSE), | |
247 | HOWTO (R_PCRBYTE, 0, 0, 8, TRUE, 0, complain_overflow_signed, special, "DISP8", FALSE, 0x000000ff, 0x000000ff, TRUE), | |
248 | HOWTO (R_PCRWORD, 0, 1, 16, TRUE, 0, complain_overflow_signed, special, "DISP16", FALSE, 0x0000ffff, 0x0000ffff, TRUE), | |
249 | HOWTO (R_PCRLONG, 0, 2, 32, TRUE, 0, complain_overflow_signed, special, "DISP32", FALSE, 0xffffffff, 0xffffffff, TRUE), | |
250 | HOWTO (R_MOV16B1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, special, "relaxable mov.b:16", FALSE, 0x0000ffff, 0x0000ffff, FALSE), | |
251 | HOWTO (R_MOV16B2, 0, 1, 8, FALSE, 0, complain_overflow_bitfield, special, "relaxed mov.b:16", FALSE, 0x000000ff, 0x000000ff, FALSE), | |
252 | HOWTO (R_JMP1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, special, "16/pcrel", FALSE, 0x0000ffff, 0x0000ffff, FALSE), | |
253 | HOWTO (R_JMP2, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, special, "pcrecl/16", FALSE, 0x000000ff, 0x000000ff, FALSE), | |
254 | HOWTO (R_JMPL1, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, special, "24/pcrell", FALSE, 0x00ffffff, 0x00ffffff, FALSE), | |
255 | HOWTO (R_JMPL2, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, special, "pc8/24", FALSE, 0x000000ff, 0x000000ff, FALSE), | |
256 | HOWTO (R_MOV24B1, 0, 1, 32, FALSE, 0, complain_overflow_bitfield, special, "relaxable mov.b:24", FALSE, 0xffffffff, 0xffffffff, FALSE), | |
257 | HOWTO (R_MOV24B2, 0, 1, 8, FALSE, 0, complain_overflow_bitfield, special, "relaxed mov.b:24", FALSE, 0x0000ffff, 0x0000ffff, FALSE), | |
252b5132 RH |
258 | |
259 | /* An indirect reference to a function. This causes the function's address | |
260 | to be added to the function vector in lo-mem and puts the address of | |
261 | the function vector's entry in the jsr instruction. */ | |
b34976b6 | 262 | HOWTO (R_MEM_INDIRECT, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, special, "8/indirect", FALSE, 0x000000ff, 0x000000ff, FALSE), |
252b5132 | 263 | |
e804e836 KH |
264 | /* Internal reloc for relaxing. This is created when a 16-bit pc-relative |
265 | branch is turned into an 8-bit pc-relative branch. */ | |
b34976b6 | 266 | HOWTO (R_PCRWORD_B, 0, 0, 8, TRUE, 0, complain_overflow_bitfield, special, "relaxed bCC:16", FALSE, 0x000000ff, 0x000000ff, FALSE), |
252b5132 | 267 | |
b34976b6 | 268 | HOWTO (R_MOVL1, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,special, "32/24 relaxable move", FALSE, 0xffffffff, 0xffffffff, FALSE), |
252b5132 | 269 | |
b34976b6 | 270 | HOWTO (R_MOVL2, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, special, "32/24 relaxed move", FALSE, 0x0000ffff, 0x0000ffff, FALSE), |
252b5132 | 271 | |
b34976b6 | 272 | HOWTO (R_BCC_INV, 0, 0, 8, TRUE, 0, complain_overflow_signed, special, "DISP8 inverted", FALSE, 0x000000ff, 0x000000ff, TRUE), |
252b5132 | 273 | |
b34976b6 | 274 | HOWTO (R_JMP_DEL, 0, 0, 8, TRUE, 0, complain_overflow_signed, special, "Deleted jump", FALSE, 0x000000ff, 0x000000ff, TRUE), |
252b5132 RH |
275 | }; |
276 | ||
cc040812 | 277 | /* Turn a howto into a reloc number. */ |
252b5132 RH |
278 | |
279 | #define SELECT_RELOC(x,howto) \ | |
bc7eab72 | 280 | { x.r_type = select_reloc (howto); } |
252b5132 | 281 | |
8d9cd6b1 NC |
282 | #define BADMAG(x) (H8300BADMAG (x) && H8300HBADMAG (x) && H8300SBADMAG (x) \ |
283 | && H8300HNBADMAG(x) && H8300SNBADMAG(x)) | |
284 | #define H8300 1 /* Customize coffcode.h */ | |
252b5132 RH |
285 | #define __A_MAGIC_SET__ |
286 | ||
cc040812 | 287 | /* Code to swap in the reloc. */ |
dc810e39 AM |
288 | #define SWAP_IN_RELOC_OFFSET H_GET_32 |
289 | #define SWAP_OUT_RELOC_OFFSET H_PUT_32 | |
252b5132 RH |
290 | #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ |
291 | dst->r_stuff[0] = 'S'; \ | |
292 | dst->r_stuff[1] = 'C'; | |
293 | ||
252b5132 | 294 | static int |
c6baf75e | 295 | select_reloc (reloc_howto_type *howto) |
252b5132 RH |
296 | { |
297 | return howto->type; | |
298 | } | |
299 | ||
cc040812 | 300 | /* Code to turn a r_type into a howto ptr, uses the above howto table. */ |
252b5132 RH |
301 | |
302 | static void | |
c6baf75e | 303 | rtype2howto (arelent *internal, struct internal_reloc *dst) |
252b5132 RH |
304 | { |
305 | switch (dst->r_type) | |
306 | { | |
307 | case R_RELBYTE: | |
308 | internal->howto = howto_table + 0; | |
309 | break; | |
310 | case R_RELWORD: | |
311 | internal->howto = howto_table + 1; | |
312 | break; | |
313 | case R_RELLONG: | |
314 | internal->howto = howto_table + 2; | |
315 | break; | |
316 | case R_PCRBYTE: | |
317 | internal->howto = howto_table + 3; | |
318 | break; | |
319 | case R_PCRWORD: | |
320 | internal->howto = howto_table + 4; | |
321 | break; | |
322 | case R_PCRLONG: | |
323 | internal->howto = howto_table + 5; | |
324 | break; | |
325 | case R_MOV16B1: | |
326 | internal->howto = howto_table + 6; | |
327 | break; | |
328 | case R_MOV16B2: | |
329 | internal->howto = howto_table + 7; | |
330 | break; | |
331 | case R_JMP1: | |
332 | internal->howto = howto_table + 8; | |
333 | break; | |
334 | case R_JMP2: | |
335 | internal->howto = howto_table + 9; | |
336 | break; | |
337 | case R_JMPL1: | |
338 | internal->howto = howto_table + 10; | |
339 | break; | |
340 | case R_JMPL2: | |
341 | internal->howto = howto_table + 11; | |
342 | break; | |
343 | case R_MOV24B1: | |
344 | internal->howto = howto_table + 12; | |
345 | break; | |
346 | case R_MOV24B2: | |
347 | internal->howto = howto_table + 13; | |
348 | break; | |
349 | case R_MEM_INDIRECT: | |
350 | internal->howto = howto_table + 14; | |
351 | break; | |
352 | case R_PCRWORD_B: | |
353 | internal->howto = howto_table + 15; | |
354 | break; | |
355 | case R_MOVL1: | |
356 | internal->howto = howto_table + 16; | |
357 | break; | |
358 | case R_MOVL2: | |
359 | internal->howto = howto_table + 17; | |
360 | break; | |
361 | case R_BCC_INV: | |
362 | internal->howto = howto_table + 18; | |
363 | break; | |
364 | case R_JMP_DEL: | |
365 | internal->howto = howto_table + 19; | |
366 | break; | |
367 | default: | |
368 | abort (); | |
369 | break; | |
370 | } | |
371 | } | |
372 | ||
bc7eab72 | 373 | #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry) |
252b5132 | 374 | |
cc040812 | 375 | /* Perform any necessary magic to the addend in a reloc entry. */ |
252b5132 RH |
376 | |
377 | #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \ | |
bc7eab72 | 378 | cache_ptr->addend = ext_reloc.r_offset; |
252b5132 | 379 | |
252b5132 | 380 | #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ |
bc7eab72 | 381 | reloc_processing (relent, reloc, symbols, abfd, section) |
252b5132 RH |
382 | |
383 | static void | |
c6baf75e RS |
384 | reloc_processing (arelent *relent, struct internal_reloc *reloc, |
385 | asymbol **symbols, bfd *abfd, asection *section) | |
252b5132 RH |
386 | { |
387 | relent->address = reloc->r_vaddr; | |
388 | rtype2howto (relent, reloc); | |
389 | ||
390 | if (((int) reloc->r_symndx) > 0) | |
2ab1486e | 391 | relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; |
252b5132 | 392 | else |
2ab1486e | 393 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
252b5132 | 394 | |
252b5132 | 395 | relent->addend = reloc->r_offset; |
252b5132 | 396 | relent->address -= section->vma; |
252b5132 RH |
397 | } |
398 | ||
b34976b6 | 399 | static bfd_boolean |
c6baf75e | 400 | h8300_symbol_address_p (bfd *abfd, asection *input_section, bfd_vma address) |
252b5132 RH |
401 | { |
402 | asymbol **s; | |
403 | ||
404 | s = _bfd_generic_link_get_symbols (abfd); | |
405 | BFD_ASSERT (s != (asymbol **) NULL); | |
406 | ||
407 | /* Search all the symbols for one in INPUT_SECTION with | |
408 | address ADDRESS. */ | |
cc040812 | 409 | while (*s) |
252b5132 RH |
410 | { |
411 | asymbol *p = *s; | |
2ab1486e | 412 | |
252b5132 RH |
413 | if (p->section == input_section |
414 | && (input_section->output_section->vma | |
415 | + input_section->output_offset | |
416 | + p->value) == address) | |
b34976b6 | 417 | return TRUE; |
252b5132 | 418 | s++; |
cc040812 | 419 | } |
b34976b6 | 420 | return FALSE; |
252b5132 RH |
421 | } |
422 | ||
252b5132 RH |
423 | /* If RELOC represents a relaxable instruction/reloc, change it into |
424 | the relaxed reloc, notify the linker that symbol addresses | |
425 | have changed (bfd_perform_slip) and return how much the current | |
426 | section has shrunk by. | |
427 | ||
428 | FIXME: Much of this code has knowledge of the ordering of entries | |
429 | in the howto table. This needs to be fixed. */ | |
430 | ||
431 | static int | |
c6baf75e RS |
432 | h8300_reloc16_estimate (bfd *abfd, asection *input_section, arelent *reloc, |
433 | unsigned int shrink, struct bfd_link_info *link_info) | |
252b5132 | 434 | { |
cc040812 | 435 | bfd_vma value; |
252b5132 RH |
436 | bfd_vma dot; |
437 | bfd_vma gap; | |
438 | static asection *last_input_section = NULL; | |
439 | static arelent *last_reloc = NULL; | |
440 | ||
5fcfd273 | 441 | /* The address of the thing to be relocated will have moved back by |
252b5132 RH |
442 | the size of the shrink - but we don't change reloc->address here, |
443 | since we need it to know where the relocation lives in the source | |
444 | uncooked section. */ | |
445 | bfd_vma address = reloc->address - shrink; | |
446 | ||
447 | if (input_section != last_input_section) | |
448 | last_reloc = NULL; | |
449 | ||
450 | /* Only examine the relocs which might be relaxable. */ | |
451 | switch (reloc->howto->type) | |
5fcfd273 | 452 | { |
e804e836 KH |
453 | /* This is the 16-/24-bit absolute branch which could become an |
454 | 8-bit pc-relative branch. */ | |
252b5132 RH |
455 | case R_JMP1: |
456 | case R_JMPL1: | |
457 | /* Get the address of the target of this branch. */ | |
cc040812 | 458 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); |
252b5132 RH |
459 | |
460 | /* Get the address of the next instruction (not the reloc). */ | |
461 | dot = (input_section->output_section->vma | |
462 | + input_section->output_offset + address); | |
463 | ||
464 | /* Adjust for R_JMP1 vs R_JMPL1. */ | |
465 | dot += (reloc->howto->type == R_JMP1 ? 1 : 2); | |
466 | ||
467 | /* Compute the distance from this insn to the branch target. */ | |
468 | gap = value - dot; | |
cc040812 | 469 | |
252b5132 RH |
470 | /* If the distance is within -128..+128 inclusive, then we can relax |
471 | this jump. +128 is valid since the target will move two bytes | |
472 | closer if we do relax this branch. */ | |
bc7eab72 | 473 | if ((int) gap >= -128 && (int) gap <= 128) |
5fcfd273 | 474 | { |
e514ac71 NC |
475 | bfd_byte code; |
476 | ||
477 | if (!bfd_get_section_contents (abfd, input_section, & code, | |
478 | reloc->address, 1)) | |
479 | break; | |
480 | code = bfd_get_8 (abfd, & code); | |
481 | ||
252b5132 RH |
482 | /* It's possible we may be able to eliminate this branch entirely; |
483 | if the previous instruction is a branch around this instruction, | |
484 | and there's no label at this instruction, then we can reverse | |
485 | the condition on the previous branch and eliminate this jump. | |
486 | ||
487 | original: new: | |
488 | bCC lab1 bCC' lab2 | |
489 | jmp lab2 | |
490 | lab1: lab1: | |
5fcfd273 | 491 | |
252b5132 | 492 | This saves 4 bytes instead of two, and should be relatively |
e514ac71 NC |
493 | common. |
494 | ||
495 | Only perform this optimisation for jumps (code 0x5a) not | |
496 | subroutine calls, as otherwise it could transform: | |
b34976b6 | 497 | |
0171ee92 AM |
498 | mov.w r0,r0 |
499 | beq .L1 | |
500 | jsr @_bar | |
501 | .L1: rts | |
502 | _bar: rts | |
e514ac71 | 503 | into: |
0171ee92 AM |
504 | mov.w r0,r0 |
505 | bne _bar | |
506 | rts | |
507 | _bar: rts | |
b34976b6 | 508 | |
e514ac71 NC |
509 | which changes the call (jsr) into a branch (bne). */ |
510 | if (code == 0x5a | |
511 | && gap <= 126 | |
252b5132 RH |
512 | && last_reloc |
513 | && last_reloc->howto->type == R_PCRBYTE) | |
514 | { | |
515 | bfd_vma last_value; | |
516 | last_value = bfd_coff_reloc16_get_value (last_reloc, link_info, | |
517 | input_section) + 1; | |
518 | ||
519 | if (last_value == dot + 2 | |
520 | && last_reloc->address + 1 == reloc->address | |
cc040812 | 521 | && !h8300_symbol_address_p (abfd, input_section, dot - 2)) |
252b5132 RH |
522 | { |
523 | reloc->howto = howto_table + 19; | |
524 | last_reloc->howto = howto_table + 18; | |
525 | last_reloc->sym_ptr_ptr = reloc->sym_ptr_ptr; | |
526 | last_reloc->addend = reloc->addend; | |
527 | shrink += 4; | |
528 | bfd_perform_slip (abfd, 4, input_section, address); | |
529 | break; | |
530 | } | |
531 | } | |
532 | ||
533 | /* Change the reloc type. */ | |
cc040812 | 534 | reloc->howto = reloc->howto + 1; |
252b5132 RH |
535 | |
536 | /* This shrinks this section by two bytes. */ | |
537 | shrink += 2; | |
cc040812 | 538 | bfd_perform_slip (abfd, 2, input_section, address); |
252b5132 RH |
539 | } |
540 | break; | |
541 | ||
e804e836 | 542 | /* This is the 16-bit pc-relative branch which could become an 8-bit |
252b5132 RH |
543 | pc-relative branch. */ |
544 | case R_PCRWORD: | |
545 | /* Get the address of the target of this branch, add one to the value | |
0171ee92 | 546 | because the addend field in PCrel jumps is off by -1. */ |
cc040812 NC |
547 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section) + 1; |
548 | ||
252b5132 RH |
549 | /* Get the address of the next instruction if we were to relax. */ |
550 | dot = input_section->output_section->vma + | |
551 | input_section->output_offset + address; | |
cc040812 | 552 | |
252b5132 RH |
553 | /* Compute the distance from this insn to the branch target. */ |
554 | gap = value - dot; | |
555 | ||
556 | /* If the distance is within -128..+128 inclusive, then we can relax | |
557 | this jump. +128 is valid since the target will move two bytes | |
558 | closer if we do relax this branch. */ | |
bc7eab72 | 559 | if ((int) gap >= -128 && (int) gap <= 128) |
5fcfd273 | 560 | { |
252b5132 RH |
561 | /* Change the reloc type. */ |
562 | reloc->howto = howto_table + 15; | |
563 | ||
564 | /* This shrinks this section by two bytes. */ | |
565 | shrink += 2; | |
cc040812 | 566 | bfd_perform_slip (abfd, 2, input_section, address); |
252b5132 RH |
567 | } |
568 | break; | |
569 | ||
e804e836 KH |
570 | /* This is a 16-bit absolute address in a mov.b insn, which can |
571 | become an 8-bit absolute address if it's in the right range. */ | |
252b5132 RH |
572 | case R_MOV16B1: |
573 | /* Get the address of the data referenced by this mov.b insn. */ | |
cc040812 | 574 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); |
7a9823f1 | 575 | value = bfd_h8300_pad_address (abfd, value); |
252b5132 | 576 | |
7a9823f1 RS |
577 | /* If the address is in the top 256 bytes of the address space |
578 | then we can relax this instruction. */ | |
579 | if (value >= 0xffffff00u) | |
252b5132 RH |
580 | { |
581 | /* Change the reloc type. */ | |
582 | reloc->howto = reloc->howto + 1; | |
583 | ||
584 | /* This shrinks this section by two bytes. */ | |
585 | shrink += 2; | |
cc040812 | 586 | bfd_perform_slip (abfd, 2, input_section, address); |
252b5132 RH |
587 | } |
588 | break; | |
589 | ||
e804e836 KH |
590 | /* Similarly for a 24-bit absolute address in a mov.b. Note that |
591 | if we can't relax this into an 8-bit absolute, we'll fall through | |
592 | and try to relax it into a 16-bit absolute. */ | |
252b5132 RH |
593 | case R_MOV24B1: |
594 | /* Get the address of the data referenced by this mov.b insn. */ | |
cc040812 | 595 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); |
7a9823f1 | 596 | value = bfd_h8300_pad_address (abfd, value); |
252b5132 | 597 | |
7a9823f1 | 598 | if (value >= 0xffffff00u) |
252b5132 RH |
599 | { |
600 | /* Change the reloc type. */ | |
601 | reloc->howto = reloc->howto + 1; | |
602 | ||
603 | /* This shrinks this section by four bytes. */ | |
604 | shrink += 4; | |
cc040812 | 605 | bfd_perform_slip (abfd, 4, input_section, address); |
252b5132 RH |
606 | |
607 | /* Done with this reloc. */ | |
608 | break; | |
609 | } | |
610 | ||
e804e836 | 611 | /* FALLTHROUGH and try to turn the 24-/32-bit reloc into a 16-bit |
252b5132 RH |
612 | reloc. */ |
613 | ||
e804e836 KH |
614 | /* This is a 24-/32-bit absolute address in a mov insn, which can |
615 | become an 16-bit absolute address if it's in the right range. */ | |
252b5132 RH |
616 | case R_MOVL1: |
617 | /* Get the address of the data referenced by this mov insn. */ | |
cc040812 | 618 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); |
7a9823f1 | 619 | value = bfd_h8300_pad_address (abfd, value); |
252b5132 | 620 | |
7a9823f1 RS |
621 | /* If the address is a sign-extended 16-bit value then we can |
622 | relax this instruction. */ | |
623 | if (value <= 0x7fff || value >= 0xffff8000u) | |
252b5132 RH |
624 | { |
625 | /* Change the reloc type. */ | |
626 | reloc->howto = howto_table + 17; | |
627 | ||
628 | /* This shrinks this section by two bytes. */ | |
629 | shrink += 2; | |
cc040812 | 630 | bfd_perform_slip (abfd, 2, input_section, address); |
252b5132 RH |
631 | } |
632 | break; | |
633 | ||
634 | /* No other reloc types represent relaxing opportunities. */ | |
cc040812 NC |
635 | default: |
636 | break; | |
252b5132 RH |
637 | } |
638 | ||
639 | last_reloc = reloc; | |
640 | last_input_section = input_section; | |
641 | return shrink; | |
642 | } | |
643 | ||
252b5132 RH |
644 | /* Handle relocations for the H8/300, including relocs for relaxed |
645 | instructions. | |
646 | ||
647 | FIXME: Not all relocations check for overflow! */ | |
648 | ||
649 | static void | |
c6baf75e RS |
650 | h8300_reloc16_extra_cases (bfd *abfd, struct bfd_link_info *link_info, |
651 | struct bfd_link_order *link_order, arelent *reloc, | |
652 | bfd_byte *data, unsigned int *src_ptr, | |
653 | unsigned int *dst_ptr) | |
252b5132 RH |
654 | { |
655 | unsigned int src_address = *src_ptr; | |
656 | unsigned int dst_address = *dst_ptr; | |
657 | asection *input_section = link_order->u.indirect.section; | |
658 | bfd_vma value; | |
659 | bfd_vma dot; | |
cc040812 | 660 | int gap, tmp; |
ca9a79a1 | 661 | unsigned char temp_code; |
252b5132 RH |
662 | |
663 | switch (reloc->howto->type) | |
664 | { | |
e804e836 | 665 | /* Generic 8-bit pc-relative relocation. */ |
252b5132 RH |
666 | case R_PCRBYTE: |
667 | /* Get the address of the target of this branch. */ | |
cc040812 | 668 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); |
252b5132 | 669 | |
44da2da1 | 670 | dot = (input_section->output_offset |
cc040812 | 671 | + dst_address |
252b5132 RH |
672 | + link_order->u.indirect.section->output_section->vma); |
673 | ||
674 | gap = value - dot; | |
675 | ||
676 | /* Sanity check. */ | |
677 | if (gap < -128 || gap > 126) | |
678 | { | |
679 | if (! ((*link_info->callbacks->reloc_overflow) | |
dfeffb9f L |
680 | (link_info, NULL, |
681 | bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
252b5132 RH |
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. */ | |
252b5132 RH |
689 | bfd_put_8 (abfd, gap, data + dst_address); |
690 | dst_address++; | |
691 | src_address++; | |
692 | ||
693 | /* All done. */ | |
694 | break; | |
695 | ||
e804e836 | 696 | /* Generic 16-bit pc-relative relocation. */ |
252b5132 RH |
697 | case R_PCRWORD: |
698 | /* Get the address of the target of this branch. */ | |
cc040812 | 699 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); |
252b5132 RH |
700 | |
701 | /* Get the address of the instruction (not the reloc). */ | |
44da2da1 | 702 | dot = (input_section->output_offset |
5fcfd273 | 703 | + dst_address |
252b5132 RH |
704 | + link_order->u.indirect.section->output_section->vma + 1); |
705 | ||
706 | gap = value - dot; | |
707 | ||
708 | /* Sanity check. */ | |
709 | if (gap > 32766 || gap < -32768) | |
710 | { | |
711 | if (! ((*link_info->callbacks->reloc_overflow) | |
dfeffb9f L |
712 | (link_info, NULL, |
713 | bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
252b5132 RH |
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. */ | |
dc810e39 | 721 | bfd_put_16 (abfd, (bfd_vma) gap, data + dst_address); |
252b5132 RH |
722 | dst_address += 2; |
723 | src_address += 2; | |
724 | ||
725 | /* All done. */ | |
726 | break; | |
727 | ||
e804e836 | 728 | /* Generic 8-bit absolute relocation. */ |
252b5132 RH |
729 | case R_RELBYTE: |
730 | /* Get the address of the object referenced by this insn. */ | |
731 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
732 | ||
7a9823f1 RS |
733 | bfd_put_8 (abfd, value & 0xff, data + dst_address); |
734 | dst_address += 1; | |
735 | src_address += 1; | |
252b5132 RH |
736 | |
737 | /* All done. */ | |
738 | break; | |
739 | ||
e804e836 | 740 | /* Various simple 16-bit absolute relocations. */ |
252b5132 RH |
741 | case R_MOV16B1: |
742 | case R_JMP1: | |
743 | case R_RELWORD: | |
cc040812 | 744 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); |
252b5132 RH |
745 | bfd_put_16 (abfd, value, data + dst_address); |
746 | dst_address += 2; | |
747 | src_address += 2; | |
748 | break; | |
749 | ||
e804e836 | 750 | /* Various simple 24-/32-bit absolute relocations. */ |
252b5132 RH |
751 | case R_MOV24B1: |
752 | case R_MOVL1: | |
753 | case R_RELLONG: | |
754 | /* Get the address of the target of this branch. */ | |
cc040812 | 755 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); |
252b5132 RH |
756 | bfd_put_32 (abfd, value, data + dst_address); |
757 | dst_address += 4; | |
758 | src_address += 4; | |
759 | break; | |
760 | ||
e804e836 | 761 | /* Another 24-/32-bit absolute relocation. */ |
252b5132 RH |
762 | case R_JMPL1: |
763 | /* Get the address of the target of this branch. */ | |
764 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
765 | ||
766 | value = ((value & 0x00ffffff) | |
767 | | (bfd_get_32 (abfd, data + src_address) & 0xff000000)); | |
768 | bfd_put_32 (abfd, value, data + dst_address); | |
769 | dst_address += 4; | |
770 | src_address += 4; | |
771 | break; | |
772 | ||
7e89635a KH |
773 | /* This is a 24-/32-bit absolute address in one of the following |
774 | instructions: | |
775 | ||
776 | "band", "bclr", "biand", "bild", "bior", "bist", "bixor", | |
3255318a NC |
777 | "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", "ldc.w", |
778 | "stc.w" and "mov.[bwl]" | |
7e89635a KH |
779 | |
780 | We may relax this into an 16-bit absolute address if it's in | |
781 | the right range. */ | |
252b5132 RH |
782 | case R_MOVL2: |
783 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
7a9823f1 | 784 | value = bfd_h8300_pad_address (abfd, value); |
252b5132 RH |
785 | |
786 | /* Sanity check. */ | |
7a9823f1 | 787 | if (value <= 0x7fff || value >= 0xffff8000u) |
252b5132 | 788 | { |
e804e836 | 789 | /* Insert the 16-bit value into the proper location. */ |
252b5132 RH |
790 | bfd_put_16 (abfd, value, data + dst_address); |
791 | ||
7e89635a KH |
792 | /* Fix the opcode. For all the instructions that belong to |
793 | this relaxation, we simply need to turn off bit 0x20 in | |
794 | the previous byte. */ | |
bc7eab72 | 795 | data[dst_address - 1] &= ~0x20; |
252b5132 RH |
796 | dst_address += 2; |
797 | src_address += 4; | |
798 | } | |
799 | else | |
800 | { | |
801 | if (! ((*link_info->callbacks->reloc_overflow) | |
dfeffb9f L |
802 | (link_info, NULL, |
803 | bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
252b5132 RH |
804 | reloc->howto->name, reloc->addend, input_section->owner, |
805 | input_section, reloc->address))) | |
806 | abort (); | |
bc7eab72 | 807 | } |
252b5132 RH |
808 | break; |
809 | ||
e804e836 | 810 | /* A 16-bit absolute branch that is now an 8-bit pc-relative branch. */ |
252b5132 RH |
811 | case R_JMP2: |
812 | /* Get the address of the target of this branch. */ | |
813 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
814 | ||
815 | /* Get the address of the next instruction. */ | |
44da2da1 | 816 | dot = (input_section->output_offset |
252b5132 RH |
817 | + dst_address |
818 | + link_order->u.indirect.section->output_section->vma + 1); | |
819 | ||
820 | gap = value - dot; | |
821 | ||
822 | /* Sanity check. */ | |
823 | if (gap < -128 || gap > 126) | |
824 | { | |
825 | if (! ((*link_info->callbacks->reloc_overflow) | |
dfeffb9f L |
826 | (link_info, NULL, |
827 | bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
252b5132 RH |
828 | reloc->howto->name, reloc->addend, input_section->owner, |
829 | input_section, reloc->address))) | |
830 | abort (); | |
831 | } | |
832 | ||
833 | /* Now fix the instruction itself. */ | |
834 | switch (data[dst_address - 1]) | |
835 | { | |
836 | case 0x5e: | |
837 | /* jsr -> bsr */ | |
838 | bfd_put_8 (abfd, 0x55, data + dst_address - 1); | |
839 | break; | |
840 | case 0x5a: | |
7e89635a | 841 | /* jmp -> bra */ |
252b5132 RH |
842 | bfd_put_8 (abfd, 0x40, data + dst_address - 1); |
843 | break; | |
844 | ||
845 | default: | |
846 | abort (); | |
847 | } | |
848 | ||
e804e836 | 849 | /* Write out the 8-bit value. */ |
252b5132 RH |
850 | bfd_put_8 (abfd, gap, data + dst_address); |
851 | ||
852 | dst_address += 1; | |
853 | src_address += 3; | |
854 | ||
855 | break; | |
856 | ||
e804e836 | 857 | /* A 16-bit pc-relative branch that is now an 8-bit pc-relative branch. */ |
252b5132 RH |
858 | case R_PCRWORD_B: |
859 | /* Get the address of the target of this branch. */ | |
860 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
861 | ||
862 | /* Get the address of the instruction (not the reloc). */ | |
44da2da1 | 863 | dot = (input_section->output_offset |
252b5132 RH |
864 | + dst_address |
865 | + link_order->u.indirect.section->output_section->vma - 1); | |
866 | ||
867 | gap = value - dot; | |
868 | ||
869 | /* Sanity check. */ | |
870 | if (gap < -128 || gap > 126) | |
871 | { | |
872 | if (! ((*link_info->callbacks->reloc_overflow) | |
dfeffb9f L |
873 | (link_info, NULL, |
874 | bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
252b5132 RH |
875 | reloc->howto->name, reloc->addend, input_section->owner, |
876 | input_section, reloc->address))) | |
877 | abort (); | |
878 | } | |
879 | ||
880 | /* Now fix the instruction. */ | |
881 | switch (data[dst_address - 2]) | |
882 | { | |
883 | case 0x58: | |
884 | /* bCC:16 -> bCC:8 */ | |
7e89635a KH |
885 | /* Get the second byte of the original insn, which contains |
886 | the condition code. */ | |
252b5132 | 887 | tmp = data[dst_address - 1]; |
7e89635a KH |
888 | |
889 | /* Compute the fisrt byte of the relaxed instruction. The | |
890 | original sequence 0x58 0xX0 is relaxed to 0x4X, where X | |
891 | represents the condition code. */ | |
252b5132 RH |
892 | tmp &= 0xf0; |
893 | tmp >>= 4; | |
252b5132 RH |
894 | tmp |= 0x40; |
895 | ||
896 | /* Write it. */ | |
897 | bfd_put_8 (abfd, tmp, data + dst_address - 2); | |
898 | break; | |
d562d2fb | 899 | |
4259e8b6 JL |
900 | case 0x5c: |
901 | /* bsr:16 -> bsr:8 */ | |
902 | bfd_put_8 (abfd, 0x55, data + dst_address - 2); | |
903 | break; | |
252b5132 RH |
904 | |
905 | default: | |
906 | abort (); | |
907 | } | |
908 | ||
bc7eab72 KH |
909 | /* Output the target. */ |
910 | bfd_put_8 (abfd, gap, data + dst_address - 1); | |
252b5132 | 911 | |
e804e836 | 912 | /* We don't advance dst_address -- the 8-bit reloc is applied at |
bc7eab72 KH |
913 | dst_address - 1, so the next insn should begin at dst_address. */ |
914 | src_address += 2; | |
252b5132 | 915 | |
bc7eab72 | 916 | break; |
5fcfd273 | 917 | |
e804e836 | 918 | /* Similarly for a 24-bit absolute that is now 8 bits. */ |
252b5132 RH |
919 | case R_JMPL2: |
920 | /* Get the address of the target of this branch. */ | |
921 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
922 | ||
923 | /* Get the address of the instruction (not the reloc). */ | |
44da2da1 | 924 | dot = (input_section->output_offset |
252b5132 RH |
925 | + dst_address |
926 | + link_order->u.indirect.section->output_section->vma + 2); | |
927 | ||
928 | gap = value - dot; | |
929 | ||
930 | /* Fix the instruction. */ | |
931 | switch (data[src_address]) | |
932 | { | |
933 | case 0x5e: | |
934 | /* jsr -> bsr */ | |
935 | bfd_put_8 (abfd, 0x55, data + dst_address); | |
936 | break; | |
937 | case 0x5a: | |
938 | /* jmp ->bra */ | |
939 | bfd_put_8 (abfd, 0x40, data + dst_address); | |
940 | break; | |
941 | default: | |
942 | abort (); | |
943 | } | |
944 | ||
945 | bfd_put_8 (abfd, gap, data + dst_address + 1); | |
946 | dst_address += 2; | |
947 | src_address += 4; | |
948 | ||
949 | break; | |
950 | ||
630a7b0a KH |
951 | /* This is a 16-bit absolute address in one of the following |
952 | instructions: | |
953 | ||
954 | "band", "bclr", "biand", "bild", "bior", "bist", "bixor", | |
955 | "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", and | |
956 | "mov.b" | |
957 | ||
958 | We may relax this into an 8-bit absolute address if it's in | |
959 | the right range. */ | |
252b5132 RH |
960 | case R_MOV16B2: |
961 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
962 | ||
630a7b0a | 963 | /* All instructions with R_H8_DIR16B2 start with 0x6a. */ |
252b5132 RH |
964 | if (data[dst_address - 2] != 0x6a) |
965 | abort (); | |
966 | ||
ca9a79a1 | 967 | temp_code = data[src_address - 1]; |
630a7b0a KH |
968 | |
969 | /* If this is a mov.b instruction, clear the lower nibble, which | |
970 | contains the source/destination register number. */ | |
ca9a79a1 NC |
971 | if ((temp_code & 0x10) != 0x10) |
972 | temp_code &= 0xf0; | |
973 | ||
252b5132 | 974 | /* Fix up the opcode. */ |
ca9a79a1 | 975 | switch (temp_code) |
252b5132 RH |
976 | { |
977 | case 0x00: | |
630a7b0a | 978 | /* This is mov.b @aa:16,Rd. */ |
cc040812 | 979 | data[dst_address - 2] = (data[src_address - 1] & 0xf) | 0x20; |
252b5132 RH |
980 | break; |
981 | case 0x80: | |
630a7b0a | 982 | /* This is mov.b Rs,@aa:16. */ |
cc040812 | 983 | data[dst_address - 2] = (data[src_address - 1] & 0xf) | 0x30; |
252b5132 | 984 | break; |
ca9a79a1 | 985 | case 0x18: |
630a7b0a KH |
986 | /* This is a bit-maniputation instruction that stores one |
987 | bit into memory, one of "bclr", "bist", "bnot", "bset", | |
988 | and "bst". */ | |
ca9a79a1 NC |
989 | data[dst_address - 2] = 0x7f; |
990 | break; | |
991 | case 0x10: | |
630a7b0a KH |
992 | /* This is a bit-maniputation instruction that loads one bit |
993 | from memory, one of "band", "biand", "bild", "bior", | |
994 | "bixor", "bld", "bor", "btst", and "bxor". */ | |
ca9a79a1 NC |
995 | data[dst_address - 2] = 0x7e; |
996 | break; | |
252b5132 RH |
997 | default: |
998 | abort (); | |
999 | } | |
1000 | ||
1001 | bfd_put_8 (abfd, value & 0xff, data + dst_address - 1); | |
1002 | src_address += 2; | |
1003 | break; | |
1004 | ||
630a7b0a KH |
1005 | /* This is a 24-bit absolute address in one of the following |
1006 | instructions: | |
1007 | ||
1008 | "band", "bclr", "biand", "bild", "bior", "bist", "bixor", | |
1009 | "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", and | |
1010 | "mov.b" | |
1011 | ||
1012 | We may relax this into an 8-bit absolute address if it's in | |
1013 | the right range. */ | |
252b5132 RH |
1014 | case R_MOV24B2: |
1015 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
1016 | ||
630a7b0a | 1017 | /* All instructions with R_MOV24B2 start with 0x6a. */ |
252b5132 RH |
1018 | if (data[dst_address - 2] != 0x6a) |
1019 | abort (); | |
1020 | ||
ca9a79a1 | 1021 | temp_code = data[src_address - 1]; |
630a7b0a KH |
1022 | |
1023 | /* If this is a mov.b instruction, clear the lower nibble, which | |
1024 | contains the source/destination register number. */ | |
ca9a79a1 NC |
1025 | if ((temp_code & 0x30) != 0x30) |
1026 | temp_code &= 0xf0; | |
1027 | ||
252b5132 | 1028 | /* Fix up the opcode. */ |
ca9a79a1 | 1029 | switch (temp_code) |
252b5132 RH |
1030 | { |
1031 | case 0x20: | |
630a7b0a | 1032 | /* This is mov.b @aa:24/32,Rd. */ |
cc040812 | 1033 | data[dst_address - 2] = (data[src_address - 1] & 0xf) | 0x20; |
252b5132 RH |
1034 | break; |
1035 | case 0xa0: | |
630a7b0a | 1036 | /* This is mov.b Rs,@aa:24/32. */ |
cc040812 | 1037 | data[dst_address - 2] = (data[src_address - 1] & 0xf) | 0x30; |
252b5132 | 1038 | break; |
ca9a79a1 | 1039 | case 0x38: |
630a7b0a KH |
1040 | /* This is a bit-maniputation instruction that stores one |
1041 | bit into memory, one of "bclr", "bist", "bnot", "bset", | |
1042 | and "bst". */ | |
ca9a79a1 NC |
1043 | data[dst_address - 2] = 0x7f; |
1044 | break; | |
1045 | case 0x30: | |
630a7b0a KH |
1046 | /* This is a bit-maniputation instruction that loads one bit |
1047 | from memory, one of "band", "biand", "bild", "bior", | |
1048 | "bixor", "bld", "bor", "btst", and "bxor". */ | |
ca9a79a1 NC |
1049 | data[dst_address - 2] = 0x7e; |
1050 | break; | |
252b5132 RH |
1051 | default: |
1052 | abort (); | |
1053 | } | |
1054 | ||
1055 | bfd_put_8 (abfd, value & 0xff, data + dst_address - 1); | |
1056 | src_address += 4; | |
1057 | break; | |
1058 | ||
1059 | case R_BCC_INV: | |
1060 | /* Get the address of the target of this branch. */ | |
cc040812 | 1061 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); |
252b5132 | 1062 | |
44da2da1 | 1063 | dot = (input_section->output_offset |
cc040812 | 1064 | + dst_address |
252b5132 RH |
1065 | + link_order->u.indirect.section->output_section->vma) + 1; |
1066 | ||
1067 | gap = value - dot; | |
1068 | ||
1069 | /* Sanity check. */ | |
1070 | if (gap < -128 || gap > 126) | |
1071 | { | |
1072 | if (! ((*link_info->callbacks->reloc_overflow) | |
dfeffb9f L |
1073 | (link_info, NULL, |
1074 | bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
252b5132 RH |
1075 | reloc->howto->name, reloc->addend, input_section->owner, |
1076 | input_section, reloc->address))) | |
1077 | abort (); | |
1078 | } | |
1079 | ||
1080 | /* Everything looks OK. Fix the condition in the instruction, apply | |
1081 | the relocation, and update the src/dst address appropriately. */ | |
1082 | ||
1083 | bfd_put_8 (abfd, bfd_get_8 (abfd, data + dst_address - 1) ^ 1, | |
1084 | data + dst_address - 1); | |
1085 | bfd_put_8 (abfd, gap, data + dst_address); | |
1086 | dst_address++; | |
1087 | src_address++; | |
1088 | ||
1089 | /* All done. */ | |
1090 | break; | |
1091 | ||
1092 | case R_JMP_DEL: | |
1093 | src_address += 4; | |
1094 | break; | |
1095 | ||
e804e836 | 1096 | /* An 8-bit memory indirect instruction (jmp/jsr). |
252b5132 RH |
1097 | |
1098 | There's several things that need to be done to handle | |
1099 | this relocation. | |
1100 | ||
1101 | If this is a reloc against the absolute symbol, then | |
1102 | we should handle it just R_RELBYTE. Likewise if it's | |
1103 | for a symbol with a value ge 0 and le 0xff. | |
1104 | ||
1105 | Otherwise it's a jump/call through the function vector, | |
1106 | and the linker is expected to set up the function vector | |
1107 | and put the right value into the jump/call instruction. */ | |
1108 | case R_MEM_INDIRECT: | |
1109 | { | |
1110 | /* We need to find the symbol so we can determine it's | |
1111 | address in the function vector table. */ | |
1112 | asymbol *symbol; | |
252b5132 | 1113 | const char *name; |
dc810e39 | 1114 | struct funcvec_hash_table *ftab; |
252b5132 | 1115 | struct funcvec_hash_entry *h; |
0171ee92 AM |
1116 | struct h8300_coff_link_hash_table *htab; |
1117 | asection *vectors_sec; | |
1118 | ||
f13a99db | 1119 | if (link_info->output_bfd->xvec != abfd->xvec) |
0171ee92 AM |
1120 | { |
1121 | (*_bfd_error_handler) | |
1122 | (_("cannot handle R_MEM_INDIRECT reloc when using %s output"), | |
f13a99db | 1123 | link_info->output_bfd->xvec->name); |
0171ee92 AM |
1124 | |
1125 | /* What else can we do? This function doesn't allow return | |
1126 | of an error, and we don't want to call abort as that | |
1127 | indicates an internal error. */ | |
1128 | #ifndef EXIT_FAILURE | |
1129 | #define EXIT_FAILURE 1 | |
1130 | #endif | |
1131 | xexit (EXIT_FAILURE); | |
1132 | } | |
1133 | htab = h8300_coff_hash_table (link_info); | |
1134 | vectors_sec = htab->vectors_sec; | |
252b5132 RH |
1135 | |
1136 | /* First see if this is a reloc against the absolute symbol | |
1137 | or against a symbol with a nonnegative value <= 0xff. */ | |
1138 | symbol = *(reloc->sym_ptr_ptr); | |
1139 | value = bfd_coff_reloc16_get_value (reloc, link_info, input_section); | |
1140 | if (symbol == bfd_abs_section_ptr->symbol | |
5f771d47 | 1141 | || value <= 0xff) |
252b5132 RH |
1142 | { |
1143 | /* This should be handled in a manner very similar to | |
1144 | R_RELBYTES. If the value is in range, then just slam | |
1145 | the value into the right location. Else trigger a | |
1146 | reloc overflow callback. */ | |
5f771d47 | 1147 | if (value <= 0xff) |
252b5132 RH |
1148 | { |
1149 | bfd_put_8 (abfd, value, data + dst_address); | |
1150 | dst_address += 1; | |
1151 | src_address += 1; | |
1152 | } | |
1153 | else | |
1154 | { | |
1155 | if (! ((*link_info->callbacks->reloc_overflow) | |
dfeffb9f L |
1156 | (link_info, NULL, |
1157 | bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
252b5132 RH |
1158 | reloc->howto->name, reloc->addend, input_section->owner, |
1159 | input_section, reloc->address))) | |
1160 | abort (); | |
1161 | } | |
1162 | break; | |
1163 | } | |
1164 | ||
1165 | /* This is a jump/call through a function vector, and we're | |
5fcfd273 | 1166 | expected to create the function vector ourselves. |
252b5132 RH |
1167 | |
1168 | First look up this symbol in the linker hash table -- we need | |
1169 | the derived linker symbol which holds this symbol's index | |
1170 | in the function vector. */ | |
1171 | name = symbol->name; | |
1172 | if (symbol->flags & BSF_LOCAL) | |
1173 | { | |
f60ca5e3 | 1174 | char *new_name = bfd_malloc ((bfd_size_type) strlen (name) + 10); |
d4e2de6b | 1175 | |
252b5132 RH |
1176 | if (new_name == NULL) |
1177 | abort (); | |
1178 | ||
f60ca5e3 | 1179 | sprintf (new_name, "%s_%08x", name, symbol->section->id); |
252b5132 RH |
1180 | name = new_name; |
1181 | } | |
1182 | ||
0171ee92 | 1183 | ftab = htab->funcvec_hash_table; |
b34976b6 | 1184 | h = funcvec_hash_lookup (ftab, name, FALSE, FALSE); |
252b5132 RH |
1185 | |
1186 | /* This shouldn't ever happen. If it does that means we've got | |
1187 | data corruption of some kind. Aborting seems like a reasonable | |
0171ee92 | 1188 | thing to do here. */ |
252b5132 RH |
1189 | if (h == NULL || vectors_sec == NULL) |
1190 | abort (); | |
1191 | ||
1192 | /* Place the address of the function vector entry into the | |
1193 | reloc's address. */ | |
1194 | bfd_put_8 (abfd, | |
1195 | vectors_sec->output_offset + h->offset, | |
1196 | data + dst_address); | |
1197 | ||
1198 | dst_address++; | |
1199 | src_address++; | |
1200 | ||
1201 | /* Now create an entry in the function vector itself. */ | |
d4e2de6b NC |
1202 | switch (bfd_get_mach (input_section->owner)) |
1203 | { | |
1204 | case bfd_mach_h8300: | |
1205 | case bfd_mach_h8300hn: | |
1206 | case bfd_mach_h8300sn: | |
1207 | bfd_put_16 (abfd, | |
1208 | bfd_coff_reloc16_get_value (reloc, | |
1209 | link_info, | |
1210 | input_section), | |
1211 | vectors_sec->contents + h->offset); | |
1212 | break; | |
1213 | case bfd_mach_h8300h: | |
1214 | case bfd_mach_h8300s: | |
1215 | bfd_put_32 (abfd, | |
1216 | bfd_coff_reloc16_get_value (reloc, | |
1217 | link_info, | |
1218 | input_section), | |
1219 | vectors_sec->contents + h->offset); | |
1220 | break; | |
1221 | default: | |
1222 | abort (); | |
1223 | } | |
252b5132 RH |
1224 | |
1225 | /* Gross. We've already written the contents of the vector section | |
1226 | before we get here... So we write it again with the new data. */ | |
1227 | bfd_set_section_contents (vectors_sec->output_section->owner, | |
1228 | vectors_sec->output_section, | |
1229 | vectors_sec->contents, | |
dc810e39 | 1230 | (file_ptr) vectors_sec->output_offset, |
eea6121a | 1231 | vectors_sec->size); |
252b5132 RH |
1232 | break; |
1233 | } | |
1234 | ||
1235 | default: | |
1236 | abort (); | |
1237 | break; | |
1238 | ||
1239 | } | |
1240 | ||
1241 | *src_ptr = src_address; | |
1242 | *dst_ptr = dst_address; | |
1243 | } | |
1244 | ||
252b5132 RH |
1245 | /* Routine for the h8300 linker. |
1246 | ||
1247 | This routine is necessary to handle the special R_MEM_INDIRECT | |
1248 | relocs on the h8300. It's responsible for generating a vectors | |
1249 | section and attaching it to an input bfd as well as sizing | |
1250 | the vectors section. It also creates our vectors hash table. | |
1251 | ||
1252 | It uses the generic linker routines to actually add the symbols. | |
1253 | from this BFD to the bfd linker hash table. It may add a few | |
1254 | selected static symbols to the bfd linker hash table. */ | |
1255 | ||
b34976b6 | 1256 | static bfd_boolean |
c6baf75e | 1257 | h8300_bfd_link_add_symbols (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
1258 | { |
1259 | asection *sec; | |
1260 | struct funcvec_hash_table *funcvec_hash_table; | |
dc810e39 | 1261 | bfd_size_type amt; |
0171ee92 AM |
1262 | struct h8300_coff_link_hash_table *htab; |
1263 | ||
1264 | /* Add the symbols using the generic code. */ | |
1265 | _bfd_generic_link_add_symbols (abfd, info); | |
1266 | ||
f13a99db | 1267 | if (info->output_bfd->xvec != abfd->xvec) |
0171ee92 AM |
1268 | return TRUE; |
1269 | ||
1270 | htab = h8300_coff_hash_table (info); | |
252b5132 RH |
1271 | |
1272 | /* If we haven't created a vectors section, do so now. */ | |
0171ee92 | 1273 | if (!htab->vectors_sec) |
252b5132 RH |
1274 | { |
1275 | flagword flags; | |
1276 | ||
1277 | /* Make sure the appropriate flags are set, including SEC_IN_MEMORY. */ | |
1278 | flags = (SEC_ALLOC | SEC_LOAD | |
1279 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY); | |
117ed4f8 AM |
1280 | htab->vectors_sec = bfd_make_section_with_flags (abfd, ".vectors", |
1281 | flags); | |
252b5132 RH |
1282 | |
1283 | /* If the section wasn't created, or we couldn't set the flags, | |
0171ee92 | 1284 | quit quickly now, rather than dying a painful death later. */ |
117ed4f8 | 1285 | if (!htab->vectors_sec) |
b34976b6 | 1286 | return FALSE; |
252b5132 RH |
1287 | |
1288 | /* Also create the vector hash table. */ | |
dc810e39 AM |
1289 | amt = sizeof (struct funcvec_hash_table); |
1290 | funcvec_hash_table = (struct funcvec_hash_table *) bfd_alloc (abfd, amt); | |
252b5132 RH |
1291 | |
1292 | if (!funcvec_hash_table) | |
b34976b6 | 1293 | return FALSE; |
252b5132 RH |
1294 | |
1295 | /* And initialize the funcvec hash table. */ | |
1296 | if (!funcvec_hash_table_init (funcvec_hash_table, abfd, | |
66eb6687 AM |
1297 | funcvec_hash_newfunc, |
1298 | sizeof (struct funcvec_hash_entry))) | |
252b5132 RH |
1299 | { |
1300 | bfd_release (abfd, funcvec_hash_table); | |
b34976b6 | 1301 | return FALSE; |
252b5132 RH |
1302 | } |
1303 | ||
1304 | /* Store away a pointer to the funcvec hash table. */ | |
0171ee92 | 1305 | htab->funcvec_hash_table = funcvec_hash_table; |
252b5132 RH |
1306 | } |
1307 | ||
1308 | /* Load up the function vector hash table. */ | |
0171ee92 | 1309 | funcvec_hash_table = htab->funcvec_hash_table; |
252b5132 RH |
1310 | |
1311 | /* Now scan the relocs for all the sections in this bfd; create | |
1312 | additional space in the .vectors section as needed. */ | |
1313 | for (sec = abfd->sections; sec; sec = sec->next) | |
1314 | { | |
1315 | long reloc_size, reloc_count, i; | |
1316 | asymbol **symbols; | |
1317 | arelent **relocs; | |
1318 | ||
1319 | /* Suck in the relocs, symbols & canonicalize them. */ | |
1320 | reloc_size = bfd_get_reloc_upper_bound (abfd, sec); | |
1321 | if (reloc_size <= 0) | |
1322 | continue; | |
1323 | ||
dc810e39 | 1324 | relocs = (arelent **) bfd_malloc ((bfd_size_type) reloc_size); |
252b5132 | 1325 | if (!relocs) |
b34976b6 | 1326 | return FALSE; |
252b5132 RH |
1327 | |
1328 | /* The symbols should have been read in by _bfd_generic link_add_symbols | |
1329 | call abovec, so we can cheat and use the pointer to them that was | |
1330 | saved in the above call. */ | |
1331 | symbols = _bfd_generic_link_get_symbols(abfd); | |
1332 | reloc_count = bfd_canonicalize_reloc (abfd, sec, relocs, symbols); | |
1333 | if (reloc_count <= 0) | |
1334 | { | |
1335 | free (relocs); | |
1336 | continue; | |
1337 | } | |
1338 | ||
1339 | /* Now walk through all the relocations in this section. */ | |
1340 | for (i = 0; i < reloc_count; i++) | |
1341 | { | |
1342 | arelent *reloc = relocs[i]; | |
1343 | asymbol *symbol = *(reloc->sym_ptr_ptr); | |
1344 | const char *name; | |
1345 | ||
1346 | /* We've got an indirect reloc. See if we need to add it | |
1347 | to the function vector table. At this point, we have | |
1348 | to add a new entry for each unique symbol referenced | |
1349 | by an R_MEM_INDIRECT relocation except for a reloc | |
1350 | against the absolute section symbol. */ | |
1351 | if (reloc->howto->type == R_MEM_INDIRECT | |
1352 | && symbol != bfd_abs_section_ptr->symbol) | |
1353 | ||
1354 | { | |
dc810e39 | 1355 | struct funcvec_hash_table *ftab; |
252b5132 RH |
1356 | struct funcvec_hash_entry *h; |
1357 | ||
1358 | name = symbol->name; | |
1359 | if (symbol->flags & BSF_LOCAL) | |
1360 | { | |
dc810e39 | 1361 | char *new_name; |
252b5132 | 1362 | |
f60ca5e3 | 1363 | new_name = bfd_malloc ((bfd_size_type) strlen (name) + 10); |
252b5132 RH |
1364 | if (new_name == NULL) |
1365 | abort (); | |
1366 | ||
f60ca5e3 | 1367 | sprintf (new_name, "%s_%08x", name, symbol->section->id); |
252b5132 RH |
1368 | name = new_name; |
1369 | } | |
1370 | ||
1371 | /* Look this symbol up in the function vector hash table. */ | |
0171ee92 | 1372 | ftab = htab->funcvec_hash_table; |
b34976b6 | 1373 | h = funcvec_hash_lookup (ftab, name, FALSE, FALSE); |
252b5132 | 1374 | |
252b5132 RH |
1375 | /* If this symbol isn't already in the hash table, add |
1376 | it and bump up the size of the hash table. */ | |
1377 | if (h == NULL) | |
1378 | { | |
b34976b6 | 1379 | h = funcvec_hash_lookup (ftab, name, TRUE, TRUE); |
252b5132 RH |
1380 | if (h == NULL) |
1381 | { | |
1382 | free (relocs); | |
b34976b6 | 1383 | return FALSE; |
252b5132 RH |
1384 | } |
1385 | ||
1386 | /* Bump the size of the vectors section. Each vector | |
1387 | takes 2 bytes on the h8300 and 4 bytes on the h8300h. */ | |
d4e2de6b NC |
1388 | switch (bfd_get_mach (abfd)) |
1389 | { | |
1390 | case bfd_mach_h8300: | |
1391 | case bfd_mach_h8300hn: | |
1392 | case bfd_mach_h8300sn: | |
eea6121a | 1393 | htab->vectors_sec->size += 2; |
d4e2de6b NC |
1394 | break; |
1395 | case bfd_mach_h8300h: | |
1396 | case bfd_mach_h8300s: | |
eea6121a | 1397 | htab->vectors_sec->size += 4; |
d4e2de6b NC |
1398 | break; |
1399 | default: | |
1400 | abort (); | |
1401 | } | |
252b5132 RH |
1402 | } |
1403 | } | |
1404 | } | |
1405 | ||
1406 | /* We're done with the relocations, release them. */ | |
1407 | free (relocs); | |
1408 | } | |
1409 | ||
1410 | /* Now actually allocate some space for the function vector. It's | |
1411 | wasteful to do this more than once, but this is easier. */ | |
0171ee92 | 1412 | sec = htab->vectors_sec; |
eea6121a | 1413 | if (sec->size != 0) |
252b5132 RH |
1414 | { |
1415 | /* Free the old contents. */ | |
dc810e39 AM |
1416 | if (sec->contents) |
1417 | free (sec->contents); | |
252b5132 RH |
1418 | |
1419 | /* Allocate new contents. */ | |
eea6121a | 1420 | sec->contents = bfd_malloc (sec->size); |
252b5132 RH |
1421 | } |
1422 | ||
b34976b6 | 1423 | return TRUE; |
252b5132 RH |
1424 | } |
1425 | ||
1426 | #define coff_reloc16_extra_cases h8300_reloc16_extra_cases | |
1427 | #define coff_reloc16_estimate h8300_reloc16_estimate | |
1428 | #define coff_bfd_link_add_symbols h8300_bfd_link_add_symbols | |
1429 | #define coff_bfd_link_hash_table_create h8300_coff_link_hash_table_create | |
1430 | ||
1431 | #define COFF_LONG_FILENAMES | |
2b5c217d NC |
1432 | |
1433 | #ifndef bfd_pe_print_pdata | |
1434 | #define bfd_pe_print_pdata NULL | |
1435 | #endif | |
1436 | ||
252b5132 RH |
1437 | #include "coffcode.h" |
1438 | ||
252b5132 RH |
1439 | #undef coff_bfd_get_relocated_section_contents |
1440 | #undef coff_bfd_relax_section | |
1441 | #define coff_bfd_get_relocated_section_contents \ | |
1442 | bfd_coff_reloc16_get_relocated_section_contents | |
1443 | #define coff_bfd_relax_section bfd_coff_reloc16_relax_section | |
1444 | ||
3fa78519 | 1445 | CREATE_BIG_COFF_TARGET_VEC (h8300coff_vec, "coff-h8300", BFD_IS_RELAXABLE, 0, '_', NULL, COFF_SWAP_TABLE) |