Commit | Line | Data |
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252b5132 | 1 | /* ECOFF object file format. |
2571583a | 2 | Copyright (C) 1993-2017 Free Software Foundation, Inc. |
252b5132 RH |
3 | Contributed by Cygnus Support. |
4 | This file was put together by Ian Lance Taylor <ian@cygnus.com>. | |
5 | ||
6 | This file is part of GAS. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 10 | the Free Software Foundation; either version 3, or (at your option) |
252b5132 RH |
11 | any later version. |
12 | ||
13 | GAS 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 GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
252b5132 RH |
22 | |
23 | #define OBJ_HEADER "obj-ecoff.h" | |
24 | #include "as.h" | |
25 | #include "coff/internal.h" | |
26 | #include "bfd/libcoff.h" | |
27 | #include "bfd/libecoff.h" | |
28 | ||
29 | /* Almost all of the ECOFF support is actually in ecoff.c in the main | |
30 | gas directory. This file mostly just arranges to call that one at | |
31 | the right times. */ | |
32 | ||
a161fe53 | 33 | /* Set section VMAs and GP values before reloc processing. */ |
252b5132 RH |
34 | |
35 | void | |
ea1562b3 | 36 | ecoff_frob_file_before_fix (void) |
252b5132 | 37 | { |
252b5132 | 38 | bfd_vma addr; |
69852798 | 39 | asection *sec; |
252b5132 RH |
40 | |
41 | /* Set the section VMA values. We force the .sdata and .sbss | |
42 | sections to the end to ensure that their VMA addresses are close | |
43 | together so that the GP register can address both of them. We | |
44 | put the .bss section after the .sbss section. | |
45 | ||
46 | Also, for the Alpha, we must sort the sections, to make sure they | |
47 | appear in the output file in the correct order. (Actually, maybe | |
48 | this is a job for BFD. But the VMAs computed would be out of | |
49 | whack if we computed them given our initial, random ordering. | |
50 | It's possible that that wouldn't break things; I could do some | |
51 | experimenting sometime and find out. | |
52 | ||
53 | This output ordering of sections is magic, on the Alpha, at | |
54 | least. The .lita section must come before .lit8 and .lit4, | |
55 | otherwise the OSF/1 linker may silently trash the .lit{4,8} | |
2b0f3761 | 56 | section contents. Also, .text must precede .rdata. These differ |
252b5132 RH |
57 | from the order described in some parts of the DEC OSF/1 Assembly |
58 | Language Programmer's Guide, but that order doesn't seem to work | |
59 | with their linker. | |
60 | ||
61 | I don't know if section ordering on the MIPS is important. */ | |
62 | ||
ea1562b3 NC |
63 | static const char *const names[] = |
64 | { | |
252b5132 RH |
65 | /* text segment */ |
66 | ".text", ".rdata", ".init", ".fini", | |
67 | /* data segment */ | |
68 | ".data", ".lita", ".lit8", ".lit4", ".sdata", ".got", | |
69 | /* bss segment */ | |
70 | ".sbss", ".bss", | |
71 | }; | |
3438adb3 | 72 | #define n_names ((int) (sizeof (names) / sizeof (names[0]))) |
252b5132 | 73 | |
7c6beb69 AM |
74 | /* Sections that match names, order to be straightened out later. */ |
75 | asection *secs[n_names]; | |
76 | int i; | |
77 | ||
252b5132 | 78 | addr = 0; |
7c6beb69 | 79 | for (i = 0; i < n_names; i++) |
c1d05a60 | 80 | secs[i] = NULL; |
7c6beb69 | 81 | |
69852798 | 82 | for (sec = stdoutput->sections; sec != NULL; sec = sec->next) |
7c6beb69 AM |
83 | { |
84 | for (i = 0; i < n_names; i++) | |
69852798 | 85 | if (!strcmp (sec->name, names[i])) |
252b5132 | 86 | { |
69852798 AM |
87 | secs[i] = sec; |
88 | bfd_section_list_remove (stdoutput, sec); | |
7c6beb69 | 89 | break; |
252b5132 | 90 | } |
7c6beb69 | 91 | if (i == n_names) |
252b5132 | 92 | { |
69852798 AM |
93 | bfd_set_section_vma (stdoutput, sec, addr); |
94 | addr += bfd_section_size (stdoutput, sec); | |
252b5132 | 95 | } |
7c6beb69 AM |
96 | } |
97 | for (i = 0; i < n_names; i++) | |
98 | if (secs[i]) | |
99 | { | |
100 | bfd_set_section_vma (stdoutput, secs[i], addr); | |
101 | addr += bfd_section_size (stdoutput, secs[i]); | |
102 | } | |
103 | for (i = n_names - 1; i >= 0; i--) | |
104 | if (secs[i]) | |
69852798 | 105 | bfd_section_list_prepend (stdoutput, secs[i]); |
252b5132 | 106 | |
a161fe53 AM |
107 | /* Fill in the register masks. */ |
108 | { | |
109 | unsigned long gprmask = 0; | |
110 | unsigned long fprmask = 0; | |
111 | unsigned long *cprmask = NULL; | |
112 | ||
113 | #ifdef TC_MIPS | |
114 | /* Fill in the MIPS register masks. It's probably not worth | |
115 | setting up a generic interface for this. */ | |
116 | gprmask = mips_gprmask; | |
117 | cprmask = mips_cprmask; | |
118 | #endif | |
119 | ||
120 | #ifdef TC_ALPHA | |
121 | alpha_frob_ecoff_data (); | |
122 | ||
123 | if (! bfd_ecoff_set_gp_value (stdoutput, alpha_gp_value)) | |
124 | as_fatal (_("Can't set GP value")); | |
125 | ||
126 | gprmask = alpha_gprmask; | |
127 | fprmask = alpha_fprmask; | |
128 | #endif | |
129 | ||
130 | if (! bfd_ecoff_set_regmasks (stdoutput, gprmask, fprmask, cprmask)) | |
131 | as_fatal (_("Can't set register masks")); | |
132 | } | |
133 | } | |
134 | ||
135 | /* Swap out the symbols and debugging information for BFD. */ | |
136 | ||
137 | void | |
ea1562b3 | 138 | ecoff_frob_file (void) |
a161fe53 AM |
139 | { |
140 | const struct ecoff_debug_swap * const debug_swap | |
141 | = &ecoff_backend (stdoutput)->debug_swap; | |
17fc154e | 142 | bfd_vma addr ATTRIBUTE_UNUSED; |
a161fe53 AM |
143 | HDRR *hdr; |
144 | char *buf; | |
145 | char *set; | |
146 | ||
252b5132 | 147 | /* Build the ECOFF debugging information. */ |
9c2799c2 | 148 | gas_assert (ecoff_data (stdoutput) != 0); |
252b5132 RH |
149 | hdr = &ecoff_data (stdoutput)->debug_info.symbolic_header; |
150 | ecoff_build_debug (hdr, &buf, debug_swap); | |
151 | ||
152 | /* Finish up the ecoff_tdata structure. */ | |
153 | set = buf; | |
154 | #define SET(ptr, count, type, size) \ | |
155 | if (hdr->count == 0) \ | |
ea1562b3 | 156 | ecoff_data (stdoutput)->debug_info.ptr = NULL; \ |
252b5132 RH |
157 | else \ |
158 | { \ | |
159 | ecoff_data (stdoutput)->debug_info.ptr = (type) set; \ | |
160 | set += hdr->count * size; \ | |
161 | } | |
162 | ||
163 | SET (line, cbLine, unsigned char *, sizeof (unsigned char)); | |
ea1562b3 NC |
164 | SET (external_dnr, idnMax, void *, debug_swap->external_dnr_size); |
165 | SET (external_pdr, ipdMax, void *, debug_swap->external_pdr_size); | |
166 | SET (external_sym, isymMax, void *, debug_swap->external_sym_size); | |
167 | SET (external_opt, ioptMax, void *, debug_swap->external_opt_size); | |
252b5132 RH |
168 | SET (external_aux, iauxMax, union aux_ext *, sizeof (union aux_ext)); |
169 | SET (ss, issMax, char *, sizeof (char)); | |
170 | SET (ssext, issExtMax, char *, sizeof (char)); | |
ea1562b3 NC |
171 | SET (external_rfd, crfd, void *, debug_swap->external_rfd_size); |
172 | SET (external_fdr, ifdMax, void *, debug_swap->external_fdr_size); | |
173 | SET (external_ext, iextMax, void *, debug_swap->external_ext_size); | |
252b5132 | 174 | #undef SET |
252b5132 RH |
175 | } |
176 | ||
177 | /* This is called by the ECOFF code to set the external information | |
178 | for a symbol. We just pass it on to BFD, which expects the swapped | |
179 | information to be stored in the native field of the symbol. */ | |
180 | ||
181 | void | |
ea1562b3 | 182 | obj_ecoff_set_ext (symbolS *sym, EXTR *ext) |
252b5132 RH |
183 | { |
184 | const struct ecoff_debug_swap * const debug_swap | |
185 | = &ecoff_backend (stdoutput)->debug_swap; | |
186 | ecoff_symbol_type *esym; | |
187 | ||
fed9b18a ILT |
188 | know (bfd_asymbol_flavour (symbol_get_bfdsym (sym)) |
189 | == bfd_target_ecoff_flavour); | |
190 | esym = ecoffsymbol (symbol_get_bfdsym (sym)); | |
b34976b6 | 191 | esym->local = FALSE; |
252b5132 RH |
192 | esym->native = xmalloc (debug_swap->external_ext_size); |
193 | (*debug_swap->swap_ext_out) (stdoutput, ext, esym->native); | |
194 | } | |
195 | ||
196 | static int | |
ea1562b3 | 197 | ecoff_sec_sym_ok_for_reloc (asection *sec ATTRIBUTE_UNUSED) |
252b5132 RH |
198 | { |
199 | return 1; | |
200 | } | |
201 | ||
202 | static void | |
ea1562b3 | 203 | obj_ecoff_frob_symbol (symbolS *sym, int *puntp ATTRIBUTE_UNUSED) |
252b5132 RH |
204 | { |
205 | ecoff_frob_symbol (sym); | |
206 | } | |
207 | ||
208 | static void | |
ea1562b3 | 209 | ecoff_pop_insert (void) |
252b5132 RH |
210 | { |
211 | pop_insert (obj_pseudo_table); | |
212 | } | |
213 | ||
5110c57e | 214 | static int |
ea1562b3 | 215 | ecoff_separate_stab_sections (void) |
5110c57e HPN |
216 | { |
217 | return 0; | |
218 | } | |
219 | ||
ea1562b3 NC |
220 | /* These are the pseudo-ops we support in this file. Only those |
221 | relating to debugging information are supported here. | |
222 | ||
223 | The following pseudo-ops from the Kane and Heinrich MIPS book | |
37f9ec62 MR |
224 | should be defined here, but are currently unsupported: .bgnb, |
225 | .endb, .verstamp, .vreg. | |
ea1562b3 NC |
226 | |
227 | The following pseudo-ops from the Kane and Heinrich MIPS book are | |
228 | MIPS CPU specific, and should be defined by tc-mips.c: .alias, | |
229 | .extern, .galive, .gjaldef, .gjrlive, .livereg, .noalias, .option, | |
230 | .rdata, .sdata, .set. | |
231 | ||
232 | The following pseudo-ops from the Kane and Heinrich MIPS book are | |
233 | not MIPS CPU specific, but are also not ECOFF specific. I have | |
234 | only listed the ones which are not already in read.c. It's not | |
235 | completely clear where these should be defined, but tc-mips.c is | |
236 | probably the most reasonable place: .asciiz, .asm0, .endr, .err, | |
237 | .half, .lab, .repeat, .struct, .weakext. */ | |
238 | ||
239 | const pseudo_typeS obj_pseudo_table[] = | |
240 | { | |
241 | /* COFF style debugging information. .ln is not used; .loc is used | |
242 | instead. */ | |
243 | { "def", ecoff_directive_def, 0 }, | |
244 | { "dim", ecoff_directive_dim, 0 }, | |
245 | { "endef", ecoff_directive_endef, 0 }, | |
246 | { "file", ecoff_directive_file, 0 }, | |
247 | { "scl", ecoff_directive_scl, 0 }, | |
248 | { "size", ecoff_directive_size, 0 }, | |
249 | { "esize", ecoff_directive_size, 0 }, | |
250 | { "tag", ecoff_directive_tag, 0 }, | |
251 | { "type", ecoff_directive_type, 0 }, | |
252 | { "etype", ecoff_directive_type, 0 }, | |
253 | { "val", ecoff_directive_val, 0 }, | |
254 | ||
255 | /* ECOFF specific debugging information. */ | |
37f9ec62 | 256 | { "aent", ecoff_directive_ent, 1 }, |
ea1562b3 NC |
257 | { "begin", ecoff_directive_begin, 0 }, |
258 | { "bend", ecoff_directive_bend, 0 }, | |
259 | { "end", ecoff_directive_end, 0 }, | |
260 | { "ent", ecoff_directive_ent, 0 }, | |
261 | { "fmask", ecoff_directive_fmask, 0 }, | |
262 | { "frame", ecoff_directive_frame, 0 }, | |
263 | { "loc", ecoff_directive_loc, 0 }, | |
264 | { "mask", ecoff_directive_mask, 0 }, | |
265 | ||
266 | /* Other ECOFF directives. */ | |
267 | { "extern", ecoff_directive_extern, 0 }, | |
268 | ||
269 | #ifndef TC_MIPS | |
270 | /* For TC_MIPS, tc-mips.c adds this. */ | |
271 | { "weakext", ecoff_directive_weakext, 0 }, | |
272 | #endif | |
273 | ||
274 | /* These are used on Irix. I don't know how to implement them. */ | |
275 | { "bgnb", s_ignore, 0 }, | |
276 | { "endb", s_ignore, 0 }, | |
277 | { "verstamp", s_ignore, 0 }, | |
278 | ||
279 | /* Sentinel. */ | |
280 | { NULL, s_ignore, 0 } | |
281 | }; | |
282 | ||
252b5132 RH |
283 | const struct format_ops ecoff_format_ops = |
284 | { | |
285 | bfd_target_ecoff_flavour, | |
ea1562b3 | 286 | 0, /* dfl_leading_underscore. */ |
5110c57e HPN |
287 | |
288 | /* FIXME: A comment why emit_section_symbols is different here (1) from | |
289 | the single-format definition (0) would be in order. */ | |
ea1562b3 NC |
290 | 1, /* emit_section_symbols. */ |
291 | 0, /* begin. */ | |
5110c57e | 292 | ecoff_new_file, |
252b5132 RH |
293 | obj_ecoff_frob_symbol, |
294 | ecoff_frob_file, | |
ea1562b3 | 295 | 0, /* frob_file_before_adjust. */ |
a161fe53 | 296 | ecoff_frob_file_before_fix, |
ea1562b3 NC |
297 | 0, /* frob_file_after_relocs. */ |
298 | 0, /* s_get_size. */ | |
299 | 0, /* s_set_size. */ | |
300 | 0, /* s_get_align. */ | |
301 | 0, /* s_set_align. */ | |
302 | 0, /* s_get_other. */ | |
303 | 0, /* s_set_other. */ | |
304 | 0, /* s_get_desc. */ | |
305 | 0, /* s_set_desc. */ | |
306 | 0, /* s_get_type. */ | |
307 | 0, /* s_set_type. */ | |
308 | 0, /* copy_symbol_attributes. */ | |
252b5132 RH |
309 | ecoff_generate_asm_lineno, |
310 | ecoff_stab, | |
5110c57e | 311 | ecoff_separate_stab_sections, |
ea1562b3 | 312 | 0, /* init_stab_section. */ |
252b5132 RH |
313 | ecoff_sec_sym_ok_for_reloc, |
314 | ecoff_pop_insert, | |
315 | ecoff_set_ext, | |
316 | ecoff_read_begin_hook, | |
4cae74aa | 317 | ecoff_symbol_new_hook, |
645ea3ea AM |
318 | ecoff_symbol_clone_hook, |
319 | 0 /* adjust_symtab. */ | |
252b5132 | 320 | }; |