1 /* BFD back-end for Intel 960 COFF files.
2 Copyright (C) 1990, 91, 92, 93, 94, 1995 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 #define BADMAG(x) I960BADMAG(x)
28 #include "coff/i960.h"
29 #include "coff/internal.h"
30 #include "libcoff.h" /* to allow easier abstraction-breaking */
32 static bfd_reloc_status_type optcall_callback
33 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
34 static bfd_reloc_status_type coff_i960_relocate
35 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
37 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
39 /* The i960 does not support an MMU, so COFF_PAGE_SIZE can be
41 #define COFF_PAGE_SIZE 1
43 #define COFF_LONG_FILENAMES
45 #define CALLS 0x66003800 /* Template for 'calls' instruction */
46 #define BAL 0x0b000000 /* Template for 'bal' instruction */
47 #define BAL_MASK 0x00ffffff
49 static bfd_reloc_status_type
50 optcall_callback (abfd, reloc_entry, symbol_in, data,
51 input_section, ignore_bfd, error_message)
56 asection *input_section;
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 */
63 bfd_reloc_status_type result;
64 coff_symbol_type *cs = coffsymbol(symbol_in);
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;
73 /* So the target symbol has to be of coff type, and the symbol
74 has to have the correct native information within it */
75 if ((bfd_asymbol_flavour(&cs->symbol) != bfd_target_coff_flavour)
76 || (cs->native == (combined_entry_type *)NULL))
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. */
83 (char *) "uncertain calling convention for non-COFF symbol";
84 result = bfd_reloc_dangerous;
88 switch (cs->native->u.syment.n_sclass)
92 /* This is a call to a leaf procedure, replace instruction with a bal
93 to the correct location. */
95 union internal_auxent *aux = &((cs->native+2)->u.auxent);
96 int word = bfd_get_32(abfd, (bfd_byte *)data + reloc_entry->address);
97 int olf = (aux->x_bal.x_balntry - cs->native->u.syment.n_value);
98 BFD_ASSERT(cs->native->u.syment.n_numaux==2);
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. */
105 word = ((word + olf) & BAL_MASK) | BAL;
106 bfd_put_32(abfd, word, (bfd_byte *) data + reloc_entry->address);
108 result = bfd_reloc_ok;
111 /* This is a call to a system call, replace with a calls to # */
113 result = bfd_reloc_ok;
116 result = bfd_reloc_ok;
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
131 static bfd_reloc_status_type
132 coff_i960_relocate (abfd, reloc_entry, symbol, data, input_section,
133 output_bfd, error_message)
135 arelent *reloc_entry;
138 asection *input_section;
140 char **error_message;
144 if (output_bfd == NULL)
146 /* Not generating relocateable output file. */
147 return bfd_reloc_continue;
150 if (bfd_is_und_section (bfd_get_section (symbol)))
152 /* Symbol is not defined, so no need to worry about it. */
153 return bfd_reloc_continue;
156 if (bfd_is_com_section (bfd_get_section (symbol)))
158 /* I don't really know what the right action is for a common
160 return bfd_reloc_continue;
163 /* Convert the reloc to use the section symbol. FIXME: This method
164 is ridiculous. Fortunately, we don't use the used_by_bfd field
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;
171 const char *sec_name;
172 asymbol **syms, **sym_end;
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++)
179 if (bfd_asymbol_name (*syms) != NULL
180 && (*syms)->value == 0
181 && strcmp (!(*syms)->section->output_section->name, sec_name))
183 osec->used_by_bfd = (PTR) syms;
184 reloc_entry->sym_ptr_ptr = syms;
193 /* Let bfd_perform_relocation do its thing, which will include
194 stuffing the symbol addend into the object file. */
195 return bfd_reloc_continue;
198 static reloc_howto_type howto_rellong =
199 HOWTO ((unsigned int) R_RELLONG, 0, 2, 32,false, 0,
200 complain_overflow_bitfield, coff_i960_relocate,"rellong", true,
201 0xffffffff, 0xffffffff, 0);
202 static reloc_howto_type howto_iprmed =
203 HOWTO (R_IPRMED, 0, 2, 24,true,0, complain_overflow_signed,
204 coff_i960_relocate, "iprmed ", true, 0x00ffffff, 0x00ffffff, 0);
205 static reloc_howto_type howto_optcall =
206 HOWTO (R_OPTCALL, 0,2,24,true,0, complain_overflow_signed,
207 optcall_callback, "optcall", true, 0x00ffffff, 0x00ffffff, 0);
209 static reloc_howto_type *
210 coff_i960_reloc_type_lookup (abfd, code)
212 bfd_reloc_code_real_type code;
218 case BFD_RELOC_I960_CALLJ:
219 return &howto_optcall;
222 return &howto_rellong;
223 case BFD_RELOC_24_PCREL:
224 return &howto_iprmed;
228 /* The real code is in coffcode.h */
230 #define RTYPE2HOWTO(cache_ptr, dst) \
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; \
239 (cache_ptr)->howto = howto_ptr; \
242 #include "coffcode.h"
244 #undef coff_bfd_reloc_type_lookup
245 #define coff_bfd_reloc_type_lookup coff_i960_reloc_type_lookup
247 const bfd_target icoff_little_vec =
249 "coff-Intel-little", /* name */
250 bfd_target_coff_flavour,
251 false, /* data byte order is little */
252 false, /* header byte order is little */
254 (HAS_RELOC | EXEC_P | /* object flags */
255 HAS_LINENO | HAS_DEBUG |
256 HAS_SYMS | HAS_LOCALS | WP_TEXT),
258 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
259 '_', /* leading underscore */
260 '/', /* ar_pad_char */
261 15, /* ar_max_namelen */
263 3, /* minimum alignment power */
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 */
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},
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),
286 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
292 const bfd_target icoff_big_vec =
294 "coff-Intel-big", /* name */
295 bfd_target_coff_flavour,
296 false, /* data byte order is little */
297 true, /* header byte order is big */
299 (HAS_RELOC | EXEC_P | /* object flags */
300 HAS_LINENO | HAS_DEBUG |
301 HAS_SYMS | HAS_LOCALS | WP_TEXT),
303 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
304 '_', /* leading underscore */
305 '/', /* ar_pad_char */
306 15, /* ar_max_namelen */
308 3, /* minimum alignment power */
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 */
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},
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),
331 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),