Commit | Line | Data |
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252b5132 | 1 | /* BFD back-end for RISC iX (Acorn, arm) binaries. |
b34976b6 | 2 | Copyright 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002 |
27985c55 | 3 | Free Software Foundation, Inc. |
252b5132 | 4 | Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org) |
3d855632 | 5 | |
252b5132 RH |
6 | This file is part of BFD, the Binary File Descriptor library. |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
252b5132 RH |
22 | /* RISC iX overloads the MAGIC field to indicate more than just the usual |
23 | [ZNO]MAGIC values. Also included are squeezing information and | |
24 | shared library usage. */ | |
25 | ||
26 | /* The following come from the man page. */ | |
27 | #define SHLIBLEN 60 | |
28 | ||
29 | #define MF_IMPURE 00200 | |
30 | #define MF_SQUEEZED 01000 | |
31 | #define MF_USES_SL 02000 | |
32 | #define MF_IS_SL 04000 | |
33 | ||
34 | /* Common combinations. */ | |
35 | #define IMAGIC (MF_IMPURE|ZMAGIC) /* Demand load (impure text) */ | |
36 | #define SPOMAGIC (MF_USES_SL|OMAGIC) /* OMAGIC with large header */ | |
37 | /* -- may contain a ref to a */ | |
38 | /* shared lib required by the */ | |
3d855632 | 39 | /* object. */ |
252b5132 RH |
40 | #define SLOMAGIC (MF_IS_SL|OMAGIC) /* A reference to a shared library */ |
41 | /* The text portion of the object */ | |
42 | /* contains "overflow text" from */ | |
43 | /* the shared library to be linked */ | |
44 | /* in with an object */ | |
3d855632 | 45 | #define QMAGIC (MF_SQUEEZED|ZMAGIC) /* Sqeezed demand paged. */ |
252b5132 RH |
46 | /* NOTE: This interpretation of */ |
47 | /* QMAGIC seems to be at variance */ | |
48 | /* With that used on other */ | |
3d855632 | 49 | /* architectures. */ |
252b5132 RH |
50 | #define SPZMAGIC (MF_USES_SL|ZMAGIC) /* program which uses sl */ |
51 | #define SPQMAGIC (MF_USES_SL|QMAGIC) /* sqeezed ditto */ | |
52 | #define SLZMAGIC (MF_IS_SL|ZMAGIC) /* shared lib part of prog */ | |
53 | #define SLPZMAGIC (MF_USES_SL|SLZMAGIC) /* sl which uses another */ | |
54 | ||
55 | #define N_SHARED_LIB(x) ((x).a_info & MF_USES_SL) | |
56 | ||
57 | /* Only a pure OMAGIC file has the minimal header */ | |
dc810e39 AM |
58 | #define N_TXTOFF(x) \ |
59 | ((x).a_info == OMAGIC \ | |
60 | ? 32 \ | |
61 | : (N_MAGIC(x) == ZMAGIC \ | |
62 | ? TARGET_PAGE_SIZE \ | |
63 | : 999)) | |
64 | ||
65 | #define N_TXTADDR(x) \ | |
66 | (N_MAGIC(x) != ZMAGIC \ | |
67 | ? (bfd_vma) 0 /* object file or NMAGIC */ \ | |
252b5132 RH |
68 | /* Programs with shared libs are loaded at the first page after all the \ |
69 | text segments of the shared library programs. Without looking this \ | |
70 | up we can't know exactly what the address will be. A reasonable guess \ | |
dc810e39 AM |
71 | is that a_entry will be in the first page of the executable. */ \ |
72 | : (N_SHARED_LIB(x) \ | |
73 | ? ((x).a_entry & ~(bfd_vma) (TARGET_PAGE_SIZE - 1)) \ | |
74 | : (bfd_vma) TEXT_START_ADDR)) | |
252b5132 RH |
75 | |
76 | #define N_SYMOFF(x) \ | |
77 | (N_TXTOFF (x) + (x).a_text + (x).a_data + (x).a_trsize + (x).a_drsize) | |
78 | ||
79 | #define N_STROFF(x) (N_SYMOFF (x) + (x).a_syms) | |
80 | ||
81 | #define TEXT_START_ADDR 32768 | |
82 | #define TARGET_PAGE_SIZE 32768 | |
83 | #define SEGMENT_SIZE TARGET_PAGE_SIZE | |
84 | #define DEFAULT_ARCH bfd_arch_arm | |
85 | ||
e43d48cc AM |
86 | /* Do not "beautify" the CONCAT* macro args. Traditional C will not |
87 | remove whitespace added here, and thus will fail to concatenate | |
88 | the tokens. */ | |
89 | #define MY(OP) CONCAT2 (riscix_,OP) | |
252b5132 RH |
90 | #define TARGETNAME "a.out-riscix" |
91 | #define N_BADMAG(x) ((((x).a_info & ~007200) != ZMAGIC) && \ | |
92 | (((x).a_info & ~006000) != OMAGIC) && \ | |
93 | ((x).a_info != NMAGIC)) | |
94 | #define N_MAGIC(x) ((x).a_info & ~07200) | |
95 | ||
96 | #include "bfd.h" | |
97 | #include "sysdep.h" | |
98 | #include "libbfd.h" | |
99 | ||
dc810e39 AM |
100 | #define WRITE_HEADERS(abfd, execp) \ |
101 | { \ | |
102 | bfd_size_type text_size; /* dummy vars */ \ | |
103 | file_ptr text_end; \ | |
104 | if (adata(abfd).magic == undecided_magic) \ | |
105 | NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end); \ | |
106 | \ | |
107 | execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE; \ | |
108 | execp->a_entry = bfd_get_start_address (abfd); \ | |
109 | \ | |
110 | execp->a_trsize = ((obj_textsec (abfd)->reloc_count) * \ | |
111 | obj_reloc_entry_size (abfd)); \ | |
112 | execp->a_drsize = ((obj_datasec (abfd)->reloc_count) * \ | |
113 | obj_reloc_entry_size (abfd)); \ | |
114 | NAME(aout,swap_exec_header_out) (abfd, execp, &exec_bytes); \ | |
115 | \ | |
116 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 \ | |
117 | || bfd_bwrite ((PTR) &exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE, \ | |
118 | abfd) != EXEC_BYTES_SIZE) \ | |
b34976b6 | 119 | return FALSE; \ |
dc810e39 AM |
120 | /* Now write out reloc info, followed by syms and strings */ \ |
121 | \ | |
122 | if (bfd_get_outsymbols (abfd) != (asymbol **) NULL \ | |
123 | && bfd_get_symcount (abfd) != 0) \ | |
124 | { \ | |
3d855632 | 125 | if (bfd_seek (abfd, (file_ptr) (N_SYMOFF(*execp)), SEEK_SET) != 0) \ |
b34976b6 | 126 | return FALSE; \ |
dc810e39 | 127 | \ |
b34976b6 | 128 | if (! NAME(aout,write_syms) (abfd)) return FALSE; \ |
dc810e39 | 129 | \ |
3d855632 | 130 | if (bfd_seek (abfd, (file_ptr) (N_TRELOFF(*execp)), SEEK_SET) != 0) \ |
b34976b6 | 131 | return FALSE; \ |
dc810e39 AM |
132 | \ |
133 | if (! riscix_squirt_out_relocs (abfd, obj_textsec (abfd))) \ | |
b34976b6 | 134 | return FALSE; \ |
3d855632 | 135 | if (bfd_seek (abfd, (file_ptr) (N_DRELOFF(*execp)), SEEK_SET) != 0) \ |
b34976b6 | 136 | return FALSE; \ |
dc810e39 AM |
137 | \ |
138 | if (!NAME(aout,squirt_out_relocs) (abfd, obj_datasec (abfd))) \ | |
b34976b6 | 139 | return FALSE; \ |
dc810e39 | 140 | } \ |
252b5132 RH |
141 | } |
142 | ||
143 | #include "libaout.h" | |
144 | #include "aout/aout64.h" | |
145 | ||
146 | static bfd_reloc_status_type | |
147 | riscix_fix_pcrel_26_done PARAMS ((bfd *, arelent *, asymbol *, PTR, | |
148 | asection *, bfd *, char **)); | |
149 | ||
150 | static bfd_reloc_status_type | |
151 | riscix_fix_pcrel_26 PARAMS ((bfd *, arelent *, asymbol *, PTR, | |
152 | asection *, bfd *, char **)); | |
42ef282f NC |
153 | static const bfd_target * |
154 | MY (object_p) PARAMS ((bfd *)); | |
155 | ||
156 | reloc_howto_type * | |
157 | riscix_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
158 | ||
159 | void | |
160 | riscix_swap_std_reloc_out PARAMS ((bfd *, arelent *, struct reloc_std_external *)); | |
161 | ||
b34976b6 | 162 | bfd_boolean |
42ef282f NC |
163 | riscix_squirt_out_relocs PARAMS ((bfd *, asection *)); |
164 | ||
165 | long | |
166 | MY (canonicalize_reloc) PARAMS ((bfd *, sec_ptr, arelent **, asymbol **)); | |
167 | ||
168 | const bfd_target * | |
169 | riscix_some_aout_object_p PARAMS ((bfd *, struct internal_exec *, const bfd_target *(*) (bfd *))); | |
170 | ||
252b5132 RH |
171 | |
172 | static reloc_howto_type riscix_std_reloc_howto[] = { | |
173 | /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ | |
b34976b6 AM |
174 | HOWTO( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE), |
175 | HOWTO( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE), | |
176 | HOWTO( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE), | |
177 | HOWTO( 3, 2, 3, 26, TRUE, 0, complain_overflow_signed, riscix_fix_pcrel_26 , "ARM26", TRUE, 0x00ffffff,0x00ffffff, FALSE), | |
178 | HOWTO( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, TRUE), | |
179 | HOWTO( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, TRUE), | |
180 | HOWTO( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, TRUE), | |
181 | HOWTO( 7, 2, 3, 26, FALSE, 0, complain_overflow_signed, riscix_fix_pcrel_26_done, "ARM26D",TRUE,0x00ffffff,0x00ffffff, FALSE), | |
5f771d47 | 182 | EMPTY_HOWTO (-1), |
b34976b6 AM |
183 | HOWTO( 9, 0, -1, 16, FALSE, 0, complain_overflow_bitfield,0,"NEG16", TRUE, 0x0000ffff,0x0000ffff, FALSE), |
184 | HOWTO( 10, 0, -2, 32, FALSE, 0, complain_overflow_bitfield,0,"NEG32", TRUE, 0xffffffff,0xffffffff, FALSE) | |
252b5132 RH |
185 | }; |
186 | ||
187 | #define RISCIX_TABLE_SIZE \ | |
188 | (sizeof (riscix_std_reloc_howto) / sizeof (reloc_howto_type)) | |
189 | ||
252b5132 RH |
190 | static bfd_reloc_status_type |
191 | riscix_fix_pcrel_26_done (abfd, reloc_entry, symbol, data, input_section, | |
192 | output_bfd, error_message) | |
5f771d47 ILT |
193 | bfd *abfd ATTRIBUTE_UNUSED; |
194 | arelent *reloc_entry ATTRIBUTE_UNUSED; | |
195 | asymbol *symbol ATTRIBUTE_UNUSED; | |
196 | PTR data ATTRIBUTE_UNUSED; | |
197 | asection *input_section ATTRIBUTE_UNUSED; | |
198 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
199 | char **error_message ATTRIBUTE_UNUSED; | |
252b5132 RH |
200 | { |
201 | /* This is dead simple at present. */ | |
202 | return bfd_reloc_ok; | |
203 | } | |
204 | ||
205 | static bfd_reloc_status_type | |
206 | riscix_fix_pcrel_26 (abfd, reloc_entry, symbol, data, input_section, | |
207 | output_bfd, error_message) | |
208 | bfd *abfd; | |
209 | arelent *reloc_entry; | |
210 | asymbol *symbol; | |
211 | PTR data; | |
212 | asection *input_section; | |
213 | bfd *output_bfd; | |
5f771d47 | 214 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
215 | { |
216 | bfd_vma relocation; | |
217 | bfd_size_type addr = reloc_entry->address; | |
218 | long target = bfd_get_32 (abfd, (bfd_byte *) data + addr); | |
219 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
3d855632 | 220 | |
252b5132 RH |
221 | /* If this is an undefined symbol, return error */ |
222 | if (symbol->section == &bfd_und_section | |
223 | && (symbol->flags & BSF_WEAK) == 0) | |
224 | return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined; | |
225 | ||
226 | /* If the sections are different, and we are doing a partial relocation, | |
227 | just ignore it for now. */ | |
228 | if (symbol->section->name != input_section->name | |
229 | && output_bfd != (bfd *)NULL) | |
230 | return bfd_reloc_continue; | |
231 | ||
232 | relocation = (target & 0x00ffffff) << 2; | |
233 | relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend */ | |
234 | relocation += symbol->value; | |
235 | relocation += symbol->section->output_section->vma; | |
236 | relocation += symbol->section->output_offset; | |
237 | relocation += reloc_entry->addend; | |
238 | relocation -= input_section->output_section->vma; | |
239 | relocation -= input_section->output_offset; | |
240 | relocation -= addr; | |
241 | if (relocation & 3) | |
242 | return bfd_reloc_overflow; | |
243 | ||
244 | /* Check for overflow */ | |
245 | if (relocation & 0x02000000) | |
246 | { | |
247 | if ((relocation & ~ (bfd_vma) 0x03ffffff) != ~ (bfd_vma) 0x03ffffff) | |
248 | flag = bfd_reloc_overflow; | |
249 | } | |
dc810e39 | 250 | else if (relocation & ~ (bfd_vma) 0x03ffffff) |
252b5132 RH |
251 | flag = bfd_reloc_overflow; |
252 | ||
253 | target &= ~0x00ffffff; | |
254 | target |= (relocation >> 2) & 0x00ffffff; | |
dc810e39 | 255 | bfd_put_32 (abfd, (bfd_vma) target, (bfd_byte *) data + addr); |
252b5132 RH |
256 | |
257 | /* Now the ARM magic... Change the reloc type so that it is marked as done. | |
258 | Strictly this is only necessary if we are doing a partial relocation. */ | |
259 | reloc_entry->howto = &riscix_std_reloc_howto[7]; | |
3d855632 | 260 | |
252b5132 RH |
261 | return flag; |
262 | } | |
263 | ||
264 | reloc_howto_type * | |
27985c55 KH |
265 | riscix_reloc_type_lookup (abfd, code) |
266 | bfd *abfd; | |
267 | bfd_reloc_code_real_type code; | |
252b5132 RH |
268 | { |
269 | #define ASTD(i,j) case i: return &riscix_std_reloc_howto[j] | |
270 | if (code == BFD_RELOC_CTOR) | |
271 | switch (bfd_get_arch_info (abfd)->bits_per_address) | |
272 | { | |
273 | case 32: | |
274 | code = BFD_RELOC_32; | |
275 | break; | |
276 | default: return (reloc_howto_type *) NULL; | |
277 | } | |
278 | ||
279 | switch (code) | |
280 | { | |
281 | ASTD (BFD_RELOC_16, 1); | |
282 | ASTD (BFD_RELOC_32, 2); | |
283 | ASTD (BFD_RELOC_ARM_PCREL_BRANCH, 3); | |
284 | ASTD (BFD_RELOC_8_PCREL, 4); | |
285 | ASTD (BFD_RELOC_16_PCREL, 5); | |
286 | ASTD (BFD_RELOC_32_PCREL, 6); | |
287 | default: return (reloc_howto_type *) NULL; | |
288 | } | |
289 | } | |
290 | ||
291 | #define MY_bfd_link_hash_table_create _bfd_generic_link_hash_table_create | |
292 | #define MY_bfd_link_add_symbols _bfd_generic_link_add_symbols | |
293 | #define MY_final_link_callback should_not_be_used | |
294 | #define MY_bfd_final_link _bfd_generic_final_link | |
295 | ||
296 | #define MY_bfd_reloc_type_lookup riscix_reloc_type_lookup | |
297 | #define MY_canonicalize_reloc riscix_canonicalize_reloc | |
298 | #define MY_object_p riscix_object_p | |
299 | ||
300 | static const bfd_target *riscix_callback PARAMS ((bfd *)); | |
301 | ||
302 | void | |
303 | riscix_swap_std_reloc_out (abfd, g, natptr) | |
304 | bfd *abfd; | |
305 | arelent *g; | |
306 | struct reloc_std_external *natptr; | |
307 | { | |
308 | int r_index; | |
309 | asymbol *sym = *(g->sym_ptr_ptr); | |
310 | int r_extern; | |
311 | int r_length; | |
312 | int r_pcrel; | |
313 | int r_neg = 0; /* Negative relocs use the BASEREL bit. */ | |
314 | asection *output_section = sym->section->output_section; | |
315 | ||
316 | PUT_WORD(abfd, g->address, natptr->r_address); | |
317 | ||
318 | r_length = g->howto->size ; /* Size as a power of two */ | |
319 | if (r_length < 0) | |
320 | { | |
321 | r_length = -r_length; | |
322 | r_neg = 1; | |
323 | } | |
324 | ||
325 | r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ | |
326 | ||
327 | /* For RISC iX, in pc-relative relocs the r_pcrel bit means that the | |
328 | relocation has been done already (Only for the 26-bit one I think)???!!! | |
329 | */ | |
3d855632 | 330 | |
252b5132 RH |
331 | if (r_length == 3) |
332 | r_pcrel = r_pcrel ? 0 : 1; | |
252b5132 RH |
333 | |
334 | #if 0 | |
335 | /* For a standard reloc, the addend is in the object file. */ | |
336 | r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma; | |
337 | #endif | |
338 | ||
339 | /* name was clobbered by aout_write_syms to be symbol index */ | |
340 | ||
341 | /* If this relocation is relative to a symbol then set the | |
342 | r_index to the symbols index, and the r_extern bit. | |
343 | ||
344 | Absolute symbols can come in in two ways, either as an offset | |
345 | from the abs section, or as a symbol which has an abs value. | |
346 | check for that here | |
347 | */ | |
348 | ||
349 | if (bfd_is_com_section (output_section) | |
350 | || output_section == &bfd_abs_section | |
351 | || output_section == &bfd_und_section) | |
352 | { | |
353 | if (bfd_abs_section.symbol == sym) | |
354 | { | |
355 | /* Whoops, looked like an abs symbol, but is really an offset | |
356 | from the abs section */ | |
357 | r_index = 0; | |
358 | r_extern = 0; | |
359 | } | |
360 | else | |
361 | { | |
362 | /* Fill in symbol */ | |
363 | r_extern = 1; | |
364 | r_index = (*g->sym_ptr_ptr)->udata.i; | |
365 | } | |
366 | } | |
367 | else | |
368 | { | |
369 | /* Just an ordinary section */ | |
370 | r_extern = 0; | |
371 | r_index = output_section->target_index; | |
372 | } | |
373 | ||
374 | /* now the fun stuff */ | |
375 | if (bfd_header_big_endian (abfd)) | |
376 | { | |
377 | natptr->r_index[0] = r_index >> 16; | |
378 | natptr->r_index[1] = r_index >> 8; | |
379 | natptr->r_index[2] = r_index; | |
380 | natptr->r_type[0] = | |
381 | ( (r_extern ? RELOC_STD_BITS_EXTERN_BIG: 0) | |
382 | | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG: 0) | |
383 | | (r_neg ? RELOC_STD_BITS_BASEREL_BIG: 0) | |
384 | | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); | |
385 | } | |
386 | else | |
387 | { | |
388 | natptr->r_index[2] = r_index >> 16; | |
389 | natptr->r_index[1] = r_index >> 8; | |
390 | natptr->r_index[0] = r_index; | |
391 | natptr->r_type[0] = | |
392 | ( (r_extern ? RELOC_STD_BITS_EXTERN_LITTLE: 0) | |
393 | | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE: 0) | |
394 | | (r_neg ? RELOC_STD_BITS_BASEREL_LITTLE: 0) | |
395 | | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); | |
396 | } | |
397 | } | |
398 | ||
b34976b6 | 399 | bfd_boolean |
252b5132 RH |
400 | riscix_squirt_out_relocs (abfd, section) |
401 | bfd *abfd; | |
402 | asection *section; | |
403 | { | |
404 | arelent **generic; | |
405 | unsigned char *native, *natptr; | |
406 | size_t each_size; | |
3d855632 | 407 | |
252b5132 | 408 | unsigned int count = section->reloc_count; |
dc810e39 | 409 | bfd_size_type natsize; |
252b5132 | 410 | |
b34976b6 AM |
411 | if (count == 0) |
412 | return TRUE; | |
252b5132 RH |
413 | |
414 | each_size = obj_reloc_entry_size (abfd); | |
dc810e39 AM |
415 | natsize = each_size; |
416 | natsize *= count; | |
252b5132 RH |
417 | native = (unsigned char *) bfd_zalloc (abfd, natsize); |
418 | if (!native) | |
b34976b6 | 419 | return FALSE; |
252b5132 RH |
420 | |
421 | generic = section->orelocation; | |
422 | ||
423 | for (natptr = native; | |
424 | count != 0; | |
425 | --count, natptr += each_size, ++generic) | |
426 | riscix_swap_std_reloc_out (abfd, *generic, | |
427 | (struct reloc_std_external *) natptr); | |
428 | ||
dc810e39 | 429 | if (bfd_bwrite ((PTR) native, natsize, abfd) != natsize) |
252b5132 | 430 | { |
dc810e39 | 431 | bfd_release (abfd, native); |
b34976b6 | 432 | return FALSE; |
252b5132 RH |
433 | } |
434 | ||
435 | bfd_release (abfd, native); | |
b34976b6 | 436 | return TRUE; |
252b5132 RH |
437 | } |
438 | ||
252b5132 RH |
439 | /* |
440 | * This is just like the standard aoutx.h version but we need to do our | |
441 | * own mapping of external reloc type values to howto entries. | |
442 | */ | |
443 | long | |
3d855632 | 444 | MY(canonicalize_reloc) (abfd, section, relptr, symbols) |
252b5132 RH |
445 | bfd *abfd; |
446 | sec_ptr section; | |
447 | arelent **relptr; | |
448 | asymbol **symbols; | |
449 | { | |
450 | arelent *tblptr = section->relocation; | |
451 | unsigned int count, c; | |
452 | extern reloc_howto_type NAME(aout,std_howto_table)[]; | |
453 | ||
3d855632 | 454 | /* If we have already read in the relocation table, return the values. */ |
252b5132 RH |
455 | if (section->flags & SEC_CONSTRUCTOR) { |
456 | arelent_chain *chain = section->constructor_chain; | |
457 | ||
458 | for (count = 0; count < section->reloc_count; count++) { | |
459 | *relptr++ = &chain->relent; | |
460 | chain = chain->next; | |
461 | } | |
462 | *relptr = 0; | |
463 | return section->reloc_count; | |
464 | } | |
465 | if (tblptr && section->reloc_count) { | |
466 | for (count = 0; count++ < section->reloc_count;) | |
467 | *relptr++ = tblptr++; | |
468 | *relptr = 0; | |
469 | return section->reloc_count; | |
470 | } | |
471 | ||
3d855632 | 472 | if (!NAME(aout,slurp_reloc_table) (abfd, section, symbols)) |
252b5132 RH |
473 | return -1; |
474 | tblptr = section->relocation; | |
475 | ||
476 | /* fix up howto entries */ | |
477 | for (count = 0; count++ < section->reloc_count;) | |
478 | { | |
479 | c = tblptr->howto - NAME(aout,std_howto_table); | |
480 | BFD_ASSERT (c < RISCIX_TABLE_SIZE); | |
481 | tblptr->howto = &riscix_std_reloc_howto[c]; | |
482 | ||
483 | *relptr++ = tblptr++; | |
484 | } | |
485 | *relptr = 0; | |
486 | return section->reloc_count; | |
487 | } | |
488 | ||
3d855632 | 489 | /* This is the same as NAME(aout,some_aout_object_p), but has different |
252b5132 RH |
490 | expansions of the macro definitions. */ |
491 | ||
492 | const bfd_target * | |
493 | riscix_some_aout_object_p (abfd, execp, callback_to_real_object_p) | |
494 | bfd *abfd; | |
495 | struct internal_exec *execp; | |
496 | const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *)); | |
497 | { | |
498 | struct aout_data_struct *rawptr, *oldrawptr; | |
499 | const bfd_target *result; | |
dc810e39 | 500 | bfd_size_type amt = sizeof (struct aout_data_struct); |
252b5132 | 501 | |
dc810e39 | 502 | rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt); |
252b5132 RH |
503 | |
504 | if (rawptr == NULL) | |
505 | return 0; | |
506 | ||
507 | oldrawptr = abfd->tdata.aout_data; | |
508 | abfd->tdata.aout_data = rawptr; | |
509 | ||
510 | /* Copy the contents of the old tdata struct. | |
511 | In particular, we want the subformat, since for hpux it was set in | |
512 | hp300hpux.c:swap_exec_header_in and will be used in | |
513 | hp300hpux.c:callback. */ | |
514 | if (oldrawptr != NULL) | |
515 | *abfd->tdata.aout_data = *oldrawptr; | |
516 | ||
517 | abfd->tdata.aout_data->a.hdr = &rawptr->e; | |
518 | *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec | |
519 | struct */ | |
520 | execp = abfd->tdata.aout_data->a.hdr; | |
521 | ||
522 | /* Set the file flags */ | |
523 | abfd->flags = BFD_NO_FLAGS; | |
524 | if (execp->a_drsize || execp->a_trsize) | |
525 | abfd->flags |= HAS_RELOC; | |
526 | /* Setting of EXEC_P has been deferred to the bottom of this function */ | |
527 | if (execp->a_syms) | |
528 | abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; | |
529 | if (N_DYNAMIC(*execp)) | |
530 | abfd->flags |= DYNAMIC; | |
531 | ||
3d855632 | 532 | if ((execp->a_info & MF_SQUEEZED) != 0) /* Squeezed files aren't supported |
252b5132 RH |
533 | (yet)! */ |
534 | { | |
535 | bfd_set_error (bfd_error_wrong_format); | |
536 | return NULL; | |
537 | } | |
538 | else if ((execp->a_info & MF_IS_SL) != 0) /* Nor are shared libraries */ | |
539 | { | |
540 | bfd_set_error (bfd_error_wrong_format); | |
541 | return NULL; | |
542 | } | |
543 | else if (N_MAGIC (*execp) == ZMAGIC) | |
544 | { | |
545 | abfd->flags |= D_PAGED | WP_TEXT; | |
546 | adata (abfd).magic = z_magic; | |
547 | } | |
548 | else if (N_MAGIC (*execp) == NMAGIC) | |
549 | { | |
550 | abfd->flags |= WP_TEXT; | |
551 | adata (abfd).magic = n_magic; | |
552 | } | |
553 | else if (N_MAGIC (*execp) == OMAGIC) | |
554 | adata (abfd).magic = o_magic; | |
555 | else | |
556 | { | |
557 | /* Should have been checked with N_BADMAG before this routine | |
558 | was called. */ | |
559 | abort (); | |
560 | } | |
561 | ||
562 | bfd_get_start_address (abfd) = execp->a_entry; | |
563 | ||
564 | obj_aout_symbols (abfd) = (aout_symbol_type *)NULL; | |
565 | bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); | |
566 | ||
567 | /* The default relocation entry size is that of traditional V7 Unix. */ | |
568 | obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; | |
569 | ||
3d855632 | 570 | /* The default symbol entry size is that of traditional Unix. */ |
252b5132 RH |
571 | obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; |
572 | ||
573 | obj_aout_external_syms (abfd) = NULL; | |
574 | obj_aout_external_strings (abfd) = NULL; | |
575 | obj_aout_sym_hashes (abfd) = NULL; | |
576 | ||
577 | if (! NAME(aout,make_sections) (abfd)) | |
578 | return NULL; | |
579 | ||
580 | obj_datasec (abfd)->_raw_size = execp->a_data; | |
581 | obj_bsssec (abfd)->_raw_size = execp->a_bss; | |
582 | ||
583 | obj_textsec (abfd)->flags = | |
584 | (execp->a_trsize != 0 | |
585 | ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) | |
586 | : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); | |
587 | obj_datasec (abfd)->flags = | |
588 | (execp->a_drsize != 0 | |
589 | ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) | |
590 | : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); | |
591 | obj_bsssec (abfd)->flags = SEC_ALLOC; | |
592 | ||
3d855632 | 593 | result = (*callback_to_real_object_p) (abfd); |
252b5132 RH |
594 | |
595 | #if defined(MACH) || defined(STAT_FOR_EXEC) | |
596 | /* The original heuristic doesn't work in some important cases. The | |
597 | * a.out file has no information about the text start address. For | |
598 | * files (like kernels) linked to non-standard addresses (ld -Ttext | |
599 | * nnn) the entry point may not be between the default text start | |
600 | * (obj_textsec(abfd)->vma) and (obj_textsec(abfd)->vma) + text size | |
601 | * This is not just a mach issue. Many kernels are loaded at non | |
602 | * standard addresses. | |
603 | */ | |
604 | { | |
605 | struct stat stat_buf; | |
606 | if (abfd->iostream != NULL | |
607 | && (abfd->flags & BFD_IN_MEMORY) == 0 | |
608 | && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0) | |
609 | && ((stat_buf.st_mode & 0111) != 0)) | |
610 | abfd->flags |= EXEC_P; | |
611 | } | |
612 | #else /* ! MACH */ | |
613 | /* Now that the segment addresses have been worked out, take a better | |
614 | guess at whether the file is executable. If the entry point | |
615 | is within the text segment, assume it is. (This makes files | |
616 | executable even if their entry point address is 0, as long as | |
617 | their text starts at zero.) | |
618 | ||
619 | At some point we should probably break down and stat the file and | |
620 | declare it executable if (one of) its 'x' bits are on... */ | |
621 | if ((execp->a_entry >= obj_textsec(abfd)->vma) && | |
622 | (execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size)) | |
623 | abfd->flags |= EXEC_P; | |
624 | #endif /* MACH */ | |
625 | if (result) | |
626 | { | |
627 | } | |
628 | else | |
629 | { | |
630 | free (rawptr); | |
631 | abfd->tdata.aout_data = oldrawptr; | |
632 | } | |
633 | return result; | |
634 | } | |
635 | ||
252b5132 RH |
636 | static const bfd_target * |
637 | MY(object_p) (abfd) | |
638 | bfd *abfd; | |
639 | { | |
640 | struct external_exec exec_bytes; /* Raw exec header from file */ | |
641 | struct internal_exec exec; /* Cleaned-up exec header */ | |
642 | const bfd_target *target; | |
643 | ||
dc810e39 AM |
644 | if (bfd_bread ((PTR) &exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE, abfd) |
645 | != EXEC_BYTES_SIZE) | |
646 | { | |
647 | if (bfd_get_error () != bfd_error_system_call) | |
648 | bfd_set_error (bfd_error_wrong_format); | |
649 | return 0; | |
650 | } | |
252b5132 | 651 | |
dc810e39 | 652 | exec.a_info = H_GET_32 (abfd, exec_bytes.e_info); |
252b5132 RH |
653 | |
654 | if (N_BADMAG (exec)) return 0; | |
655 | #ifdef MACHTYPE_OK | |
656 | if (!(MACHTYPE_OK (N_MACHTYPE (exec)))) return 0; | |
657 | #endif | |
658 | ||
3d855632 | 659 | NAME(aout,swap_exec_header_in) (abfd, &exec_bytes, &exec); |
252b5132 RH |
660 | |
661 | target = riscix_some_aout_object_p (abfd, &exec, MY(callback)); | |
662 | ||
663 | return target; | |
664 | } | |
665 | ||
252b5132 | 666 | #include "aout-target.h" |