Commit | Line | Data |
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6812b607 | 1 | /* BFD back-end for Intel 960 COFF files. |
943fbd5b | 2 | Copyright (C) 1990, 91, 92, 93, 94, 1995 Free Software Foundation, Inc. |
3b4f1a5d | 3 | Written by Cygnus Support. |
fc723380 | 4 | |
3b4f1a5d | 5 | This file is part of BFD, the Binary File Descriptor library. |
4a81b561 | 6 | |
3b4f1a5d | 7 | This program is free software; you can redistribute it and/or modify |
4a81b561 | 8 | it under the terms of the GNU General Public License as published by |
3b4f1a5d SC |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. | |
4a81b561 | 11 | |
3b4f1a5d | 12 | This program is distributed in the hope that it will be useful, |
4a81b561 DHW |
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 | |
3b4f1a5d | 18 | along with this program; if not, write to the Free Software |
943fbd5b | 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
4a81b561 | 20 | |
4a81b561 | 21 | #define I960 1 |
fc723380 JG |
22 | #define BADMAG(x) I960BADMAG(x) |
23 | ||
4a81b561 | 24 | #include "bfd.h" |
3b4f1a5d | 25 | #include "sysdep.h" |
4a81b561 | 26 | #include "libbfd.h" |
9872a49c | 27 | #include "obstack.h" |
8070f29d KR |
28 | #include "coff/i960.h" |
29 | #include "coff/internal.h" | |
4a81b561 | 30 | #include "libcoff.h" /* to allow easier abstraction-breaking */ |
6812b607 ILT |
31 | |
32 | static bfd_reloc_status_type optcall_callback | |
33 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
5e694c29 JMD |
34 | static bfd_reloc_status_type coff_i960_relocate |
35 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
36 | ||
943fbd5b KR |
37 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3) |
38 | ||
39 | /* The i960 does not support an MMU, so COFF_PAGE_SIZE can be | |
40 | arbitrarily small. */ | |
41 | #define COFF_PAGE_SIZE 1 | |
42 | ||
294eaca4 | 43 | #define COFF_LONG_FILENAMES |
4a81b561 | 44 | |
4a81b561 DHW |
45 | #define CALLS 0x66003800 /* Template for 'calls' instruction */ |
46 | #define BAL 0x0b000000 /* Template for 'bal' instruction */ | |
47 | #define BAL_MASK 0x00ffffff | |
48 | ||
3b4f1a5d | 49 | static bfd_reloc_status_type |
6812b607 | 50 | optcall_callback (abfd, reloc_entry, symbol_in, data, |
943fbd5b | 51 | input_section, ignore_bfd, error_message) |
6812b607 ILT |
52 | bfd *abfd; |
53 | arelent *reloc_entry; | |
54 | asymbol *symbol_in; | |
55 | PTR data; | |
943fbd5b | 56 | asection *input_section; |
6812b607 ILT |
57 | bfd *ignore_bfd; |
58 | char **error_message; | |
4a81b561 DHW |
59 | { |
60 | /* This item has already been relocated correctly, but we may be | |
61 | * able to patch in yet better code - done by digging out the | |
62 | * correct info on this symbol */ | |
3b4f1a5d | 63 | bfd_reloc_status_type result; |
4a81b561 DHW |
64 | coff_symbol_type *cs = coffsymbol(symbol_in); |
65 | ||
943fbd5b KR |
66 | /* Don't do anything with symbols which aren't tied up yet, |
67 | except move the reloc. */ | |
68 | if (bfd_is_und_section (cs->symbol.section)) { | |
69 | reloc_entry->address += input_section->output_offset; | |
70 | return bfd_reloc_ok; | |
71 | } | |
72 | ||
fc723380 JG |
73 | /* So the target symbol has to be of coff type, and the symbol |
74 | has to have the correct native information within it */ | |
6812b607 ILT |
75 | if ((bfd_asymbol_flavour(&cs->symbol) != bfd_target_coff_flavour) |
76 | || (cs->native == (combined_entry_type *)NULL)) | |
77 | { | |
78 | /* This is interesting, consider the case where we're outputting coff | |
79 | from a mix n match input, linking from coff to a symbol defined in a | |
80 | bout file will cause this match to be true. Should I complain? This | |
81 | will only work if the bout symbol is non leaf. */ | |
82 | *error_message = | |
83 | (char *) "uncertain calling convention for non-COFF symbol"; | |
84 | result = bfd_reloc_dangerous; | |
85 | } | |
86 | else | |
87 | { | |
3b4f1a5d | 88 | switch (cs->native->u.syment.n_sclass) |
4a81b561 DHW |
89 | { |
90 | case C_LEAFSTAT: | |
91 | case C_LEAFEXT: | |
92 | /* This is a call to a leaf procedure, replace instruction with a bal | |
6812b607 | 93 | to the correct location. */ |
4a81b561 | 94 | { |
3b4f1a5d | 95 | union internal_auxent *aux = &((cs->native+2)->u.auxent); |
8070f29d | 96 | int word = bfd_get_32(abfd, (bfd_byte *)data + reloc_entry->address); |
3b4f1a5d SC |
97 | int olf = (aux->x_bal.x_balntry - cs->native->u.syment.n_value); |
98 | BFD_ASSERT(cs->native->u.syment.n_numaux==2); | |
8e3c8f47 | 99 | |
6812b607 ILT |
100 | /* We replace the original call instruction with a bal to |
101 | the bal entry point - the offset of which is described in | |
102 | the 2nd auxent of the original symbol. We keep the native | |
103 | sym and auxents untouched, so the delta between the two | |
104 | is the offset of the bal entry point. */ | |
8e3c8f47 | 105 | word = ((word + olf) & BAL_MASK) | BAL; |
8070f29d | 106 | bfd_put_32(abfd, word, (bfd_byte *) data + reloc_entry->address); |
4a81b561 DHW |
107 | } |
108 | result = bfd_reloc_ok; | |
109 | break; | |
110 | case C_SCALL: | |
3b4f1a5d SC |
111 | /* This is a call to a system call, replace with a calls to # */ |
112 | BFD_ASSERT(0); | |
113 | result = bfd_reloc_ok; | |
4a81b561 DHW |
114 | break; |
115 | default: | |
116 | result = bfd_reloc_ok; | |
117 | break; | |
118 | } | |
119 | } | |
120 | return result; | |
121 | } | |
122 | ||
1b8a11d4 JMD |
123 | /* i960 COFF is used by VxWorks 5.1. However, VxWorks 5.1 does not |
124 | appear to correctly handle a reloc against a symbol defined in the | |
125 | same object file. It appears to simply discard such relocs, rather | |
126 | than adding their values into the object file. We handle this here | |
127 | by converting all relocs against defined symbols into relocs | |
128 | against the section symbol, when generating a relocateable output | |
129 | file. */ | |
5e694c29 JMD |
130 | |
131 | static bfd_reloc_status_type | |
132 | coff_i960_relocate (abfd, reloc_entry, symbol, data, input_section, | |
133 | output_bfd, error_message) | |
134 | bfd *abfd; | |
135 | arelent *reloc_entry; | |
136 | asymbol *symbol; | |
137 | PTR data; | |
138 | asection *input_section; | |
139 | bfd *output_bfd; | |
140 | char **error_message; | |
141 | { | |
943fbd5b | 142 | asection *osec; |
1b8a11d4 JMD |
143 | |
144 | if (output_bfd == NULL) | |
5e694c29 | 145 | { |
1b8a11d4 JMD |
146 | /* Not generating relocateable output file. */ |
147 | return bfd_reloc_continue; | |
5e694c29 JMD |
148 | } |
149 | ||
1b8a11d4 JMD |
150 | if (bfd_is_und_section (bfd_get_section (symbol))) |
151 | { | |
152 | /* Symbol is not defined, so no need to worry about it. */ | |
153 | return bfd_reloc_continue; | |
154 | } | |
155 | ||
943fbd5b KR |
156 | if (bfd_is_com_section (bfd_get_section (symbol))) |
157 | { | |
158 | /* I don't really know what the right action is for a common | |
159 | symbol. */ | |
160 | return bfd_reloc_continue; | |
161 | } | |
162 | ||
1b8a11d4 | 163 | /* Convert the reloc to use the section symbol. FIXME: This method |
943fbd5b KR |
164 | is ridiculous. Fortunately, we don't use the used_by_bfd field |
165 | in COFF. */ | |
166 | osec = bfd_get_section (symbol)->output_section; | |
167 | if (osec->used_by_bfd != NULL) | |
168 | reloc_entry->sym_ptr_ptr = (asymbol **) osec->used_by_bfd; | |
169 | else | |
1b8a11d4 | 170 | { |
943fbd5b KR |
171 | const char *sec_name; |
172 | asymbol **syms, **sym_end; | |
173 | ||
174 | sec_name = bfd_get_section_name (output_bfd, osec); | |
175 | syms = bfd_get_outsymbols (output_bfd); | |
176 | sym_end = syms + bfd_get_symcount (output_bfd); | |
177 | for (; syms < sym_end; syms++) | |
1b8a11d4 | 178 | { |
943fbd5b KR |
179 | if (bfd_asymbol_name (*syms) != NULL |
180 | && (*syms)->value == 0 | |
181 | && strcmp (!(*syms)->section->output_section->name, sec_name)) | |
182 | { | |
183 | osec->used_by_bfd = (PTR) syms; | |
184 | reloc_entry->sym_ptr_ptr = syms; | |
185 | break; | |
186 | } | |
1b8a11d4 | 187 | } |
1b8a11d4 | 188 | |
943fbd5b KR |
189 | if (syms >= sym_end) |
190 | abort (); | |
191 | } | |
1b8a11d4 JMD |
192 | |
193 | /* Let bfd_perform_relocation do its thing, which will include | |
194 | stuffing the symbol addend into the object file. */ | |
5e694c29 JMD |
195 | return bfd_reloc_continue; |
196 | } | |
197 | ||
8070f29d | 198 | static reloc_howto_type howto_rellong = |
ffeef0bb | 199 | HOWTO ((unsigned int) R_RELLONG, 0, 2, 32,false, 0, |
5e694c29 JMD |
200 | complain_overflow_bitfield, coff_i960_relocate,"rellong", true, |
201 | 0xffffffff, 0xffffffff, 0); | |
8070f29d | 202 | static reloc_howto_type howto_iprmed = |
5e694c29 JMD |
203 | HOWTO (R_IPRMED, 0, 2, 24,true,0, complain_overflow_signed, |
204 | coff_i960_relocate, "iprmed ", true, 0x00ffffff, 0x00ffffff, 0); | |
8070f29d | 205 | static reloc_howto_type howto_optcall = |
ffeef0bb KR |
206 | HOWTO (R_OPTCALL, 0,2,24,true,0, complain_overflow_signed, |
207 | optcall_callback, "optcall", true, 0x00ffffff, 0x00ffffff, 0); | |
4a81b561 | 208 | |
943fbd5b | 209 | static reloc_howto_type * |
6812b607 ILT |
210 | coff_i960_reloc_type_lookup (abfd, code) |
211 | bfd *abfd; | |
212 | bfd_reloc_code_real_type code; | |
8070f29d KR |
213 | { |
214 | switch (code) | |
215 | { | |
216 | default: | |
217 | return 0; | |
218 | case BFD_RELOC_I960_CALLJ: | |
219 | return &howto_optcall; | |
220 | case BFD_RELOC_32: | |
22aabad5 | 221 | case BFD_RELOC_CTOR: |
8070f29d KR |
222 | return &howto_rellong; |
223 | case BFD_RELOC_24_PCREL: | |
224 | return &howto_iprmed; | |
225 | } | |
226 | } | |
4a81b561 | 227 | |
924bbb38 | 228 | /* The real code is in coffcode.h */ |
4a81b561 | 229 | |
3b4f1a5d | 230 | #define RTYPE2HOWTO(cache_ptr, dst) \ |
8070f29d KR |
231 | { \ |
232 | reloc_howto_type *howto_ptr; \ | |
233 | switch ((dst)->r_type) { \ | |
234 | case 17: howto_ptr = &howto_rellong; break; \ | |
235 | case 25: howto_ptr = &howto_iprmed; break; \ | |
236 | case 27: howto_ptr = &howto_optcall; break; \ | |
237 | default: howto_ptr = 0; break; \ | |
238 | } \ | |
943fbd5b | 239 | (cache_ptr)->howto = howto_ptr; \ |
8070f29d | 240 | } |
3b4f1a5d | 241 | |
7ed4093a | 242 | #include "coffcode.h" |
4a81b561 | 243 | |
6812b607 ILT |
244 | #undef coff_bfd_reloc_type_lookup |
245 | #define coff_bfd_reloc_type_lookup coff_i960_reloc_type_lookup | |
246 | ||
ffeef0bb | 247 | const bfd_target icoff_little_vec = |
4a81b561 | 248 | { |
9872a49c | 249 | "coff-Intel-little", /* name */ |
3b4f1a5d | 250 | bfd_target_coff_flavour, |
4a81b561 | 251 | false, /* data byte order is little */ |
9872a49c | 252 | false, /* header byte order is little */ |
4a81b561 DHW |
253 | |
254 | (HAS_RELOC | EXEC_P | /* object flags */ | |
255 | HAS_LINENO | HAS_DEBUG | | |
6812b607 | 256 | HAS_SYMS | HAS_LOCALS | WP_TEXT), |
4a81b561 DHW |
257 | |
258 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
22aabad5 | 259 | '_', /* leading underscore */ |
4a81b561 DHW |
260 | '/', /* ar_pad_char */ |
261 | 15, /* ar_max_namelen */ | |
4a81b561 | 262 | |
294eaca4 | 263 | 3, /* minimum alignment power */ |
6812b607 ILT |
264 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
265 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
266 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
267 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
268 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
269 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
4a81b561 | 270 | |
294eaca4 SC |
271 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
272 | bfd_generic_archive_p, _bfd_dummy_target}, | |
273 | {bfd_false, coff_mkobject, /* bfd_set_format */ | |
274 | _bfd_generic_mkarchive, bfd_false}, | |
275 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
276 | _bfd_write_archive_contents, bfd_false}, | |
6812b607 ILT |
277 | |
278 | BFD_JUMP_TABLE_GENERIC (coff), | |
279 | BFD_JUMP_TABLE_COPY (coff), | |
280 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
281 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
282 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
283 | BFD_JUMP_TABLE_RELOCS (coff), | |
284 | BFD_JUMP_TABLE_WRITE (coff), | |
285 | BFD_JUMP_TABLE_LINK (coff), | |
22aabad5 | 286 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
6812b607 | 287 | |
8070f29d | 288 | COFF_SWAP_TABLE, |
8070f29d | 289 | }; |
4a81b561 DHW |
290 | |
291 | ||
ffeef0bb | 292 | const bfd_target icoff_big_vec = |
4a81b561 | 293 | { |
9872a49c | 294 | "coff-Intel-big", /* name */ |
3b4f1a5d | 295 | bfd_target_coff_flavour, |
4a81b561 | 296 | false, /* data byte order is little */ |
9872a49c | 297 | true, /* header byte order is big */ |
4a81b561 DHW |
298 | |
299 | (HAS_RELOC | EXEC_P | /* object flags */ | |
300 | HAS_LINENO | HAS_DEBUG | | |
6812b607 | 301 | HAS_SYMS | HAS_LOCALS | WP_TEXT), |
4a81b561 DHW |
302 | |
303 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
22aabad5 | 304 | '_', /* leading underscore */ |
4a81b561 DHW |
305 | '/', /* ar_pad_char */ |
306 | 15, /* ar_max_namelen */ | |
4a81b561 | 307 | |
3b4f1a5d | 308 | 3, /* minimum alignment power */ |
6812b607 ILT |
309 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
310 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
311 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
312 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
313 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
314 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ | |
4a81b561 | 315 | |
2b1d8a50 JG |
316 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
317 | bfd_generic_archive_p, _bfd_dummy_target}, | |
318 | {bfd_false, coff_mkobject, /* bfd_set_format */ | |
319 | _bfd_generic_mkarchive, bfd_false}, | |
320 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
321 | _bfd_write_archive_contents, bfd_false}, | |
6812b607 ILT |
322 | |
323 | BFD_JUMP_TABLE_GENERIC (coff), | |
324 | BFD_JUMP_TABLE_COPY (coff), | |
325 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
326 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
327 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
328 | BFD_JUMP_TABLE_RELOCS (coff), | |
329 | BFD_JUMP_TABLE_WRITE (coff), | |
330 | BFD_JUMP_TABLE_LINK (coff), | |
22aabad5 | 331 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
6812b607 | 332 | |
8070f29d | 333 | COFF_SWAP_TABLE, |
fc723380 | 334 | }; |