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252b5132 | 1 | /* ECOFF object file format. |
fed9b18a | 2 | Copyright (C) 1993, 94, 95, 96, 97, 98, 1999 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 | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
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 | |
20 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
21 | 02111-1307, USA. */ | |
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 | ||
33 | static int ecoff_sec_sym_ok_for_reloc PARAMS ((asection *)); | |
34 | static void obj_ecoff_frob_symbol PARAMS ((symbolS *, int *)); | |
35 | static void ecoff_pop_insert PARAMS ((void)); | |
36 | ||
37 | /* These are the pseudo-ops we support in this file. Only those | |
38 | relating to debugging information are supported here. | |
39 | ||
40 | The following pseudo-ops from the Kane and Heinrich MIPS book | |
41 | should be defined here, but are currently unsupported: .aent, | |
42 | .bgnb, .endb, .verstamp, .vreg. | |
43 | ||
44 | The following pseudo-ops from the Kane and Heinrich MIPS book are | |
45 | MIPS CPU specific, and should be defined by tc-mips.c: .alias, | |
46 | .extern, .galive, .gjaldef, .gjrlive, .livereg, .noalias, .option, | |
47 | .rdata, .sdata, .set. | |
48 | ||
49 | The following pseudo-ops from the Kane and Heinrich MIPS book are | |
50 | not MIPS CPU specific, but are also not ECOFF specific. I have | |
51 | only listed the ones which are not already in read.c. It's not | |
52 | completely clear where these should be defined, but tc-mips.c is | |
53 | probably the most reasonable place: .asciiz, .asm0, .endr, .err, | |
54 | .half, .lab, .repeat, .struct, .weakext. */ | |
55 | ||
56 | const pseudo_typeS obj_pseudo_table[] = | |
57 | { | |
58 | /* COFF style debugging information. .ln is not used; .loc is used | |
59 | instead. */ | |
60 | { "def", ecoff_directive_def, 0 }, | |
61 | { "dim", ecoff_directive_dim, 0 }, | |
62 | { "endef", ecoff_directive_endef, 0 }, | |
63 | { "file", ecoff_directive_file, 0 }, | |
64 | { "scl", ecoff_directive_scl, 0 }, | |
65 | { "size", ecoff_directive_size, 0 }, | |
66 | { "esize", ecoff_directive_size, 0 }, | |
67 | { "tag", ecoff_directive_tag, 0 }, | |
68 | { "type", ecoff_directive_type, 0 }, | |
69 | { "etype", ecoff_directive_type, 0 }, | |
70 | { "val", ecoff_directive_val, 0 }, | |
71 | ||
72 | /* ECOFF specific debugging information. */ | |
73 | { "begin", ecoff_directive_begin, 0 }, | |
74 | { "bend", ecoff_directive_bend, 0 }, | |
75 | { "end", ecoff_directive_end, 0 }, | |
76 | { "ent", ecoff_directive_ent, 0 }, | |
77 | { "fmask", ecoff_directive_fmask, 0 }, | |
78 | { "frame", ecoff_directive_frame, 0 }, | |
79 | { "loc", ecoff_directive_loc, 0 }, | |
80 | { "mask", ecoff_directive_mask, 0 }, | |
81 | ||
82 | /* Other ECOFF directives. */ | |
83 | { "extern", ecoff_directive_extern, 0 }, | |
84 | ||
85 | #ifndef TC_MIPS | |
86 | /* For TC_MIPS, tc-mips.c adds this. */ | |
87 | { "weakext", ecoff_directive_weakext, 0 }, | |
88 | #endif | |
89 | ||
90 | /* These are used on Irix. I don't know how to implement them. */ | |
91 | { "bgnb", s_ignore, 0 }, | |
92 | { "endb", s_ignore, 0 }, | |
93 | { "verstamp", s_ignore, 0 }, | |
94 | ||
95 | /* Sentinel. */ | |
96 | { NULL } | |
97 | }; | |
98 | ||
99 | /* Swap out the symbols and debugging information for BFD. */ | |
100 | ||
101 | void | |
102 | ecoff_frob_file () | |
103 | { | |
104 | const struct ecoff_debug_swap * const debug_swap | |
105 | = &ecoff_backend (stdoutput)->debug_swap; | |
106 | bfd_vma addr; | |
107 | asection *sec; | |
108 | HDRR *hdr; | |
109 | char *buf; | |
110 | char *set; | |
111 | ||
112 | /* Set the section VMA values. We force the .sdata and .sbss | |
113 | sections to the end to ensure that their VMA addresses are close | |
114 | together so that the GP register can address both of them. We | |
115 | put the .bss section after the .sbss section. | |
116 | ||
117 | Also, for the Alpha, we must sort the sections, to make sure they | |
118 | appear in the output file in the correct order. (Actually, maybe | |
119 | this is a job for BFD. But the VMAs computed would be out of | |
120 | whack if we computed them given our initial, random ordering. | |
121 | It's possible that that wouldn't break things; I could do some | |
122 | experimenting sometime and find out. | |
123 | ||
124 | This output ordering of sections is magic, on the Alpha, at | |
125 | least. The .lita section must come before .lit8 and .lit4, | |
126 | otherwise the OSF/1 linker may silently trash the .lit{4,8} | |
127 | section contents. Also, .text must preceed .rdata. These differ | |
128 | from the order described in some parts of the DEC OSF/1 Assembly | |
129 | Language Programmer's Guide, but that order doesn't seem to work | |
130 | with their linker. | |
131 | ||
132 | I don't know if section ordering on the MIPS is important. */ | |
133 | ||
134 | static const char *const names[] = { | |
135 | /* text segment */ | |
136 | ".text", ".rdata", ".init", ".fini", | |
137 | /* data segment */ | |
138 | ".data", ".lita", ".lit8", ".lit4", ".sdata", ".got", | |
139 | /* bss segment */ | |
140 | ".sbss", ".bss", | |
141 | }; | |
142 | #define n_names (sizeof (names) / sizeof (names[0])) | |
143 | ||
144 | addr = 0; | |
145 | { | |
146 | /* Sections that match names, order to be straightened out later. */ | |
147 | asection *secs[n_names]; | |
148 | /* Linked list of sections with non-matching names. Random ordering. */ | |
149 | asection *other_sections = 0; | |
150 | /* Pointer to next section, since we're destroying the original | |
151 | ordering. */ | |
152 | asection *next; | |
153 | ||
154 | int i; | |
155 | ||
156 | for (i = 0; i < n_names; i++) | |
157 | secs[i] = 0; | |
158 | for (sec = stdoutput->sections; sec != (asection *) NULL; sec = next) | |
159 | { | |
160 | next = sec->next; | |
161 | for (i = 0; i < n_names; i++) | |
162 | if (!strcmp (sec->name, names[i])) | |
163 | { | |
164 | secs[i] = sec; | |
165 | break; | |
166 | } | |
167 | if (i == n_names) | |
168 | { | |
169 | bfd_set_section_vma (stdoutput, sec, addr); | |
170 | addr += bfd_section_size (stdoutput, sec); | |
171 | sec->next = other_sections; | |
172 | other_sections = sec; | |
173 | } | |
174 | } | |
175 | for (i = 0; i < n_names; i++) | |
176 | if (secs[i]) | |
177 | { | |
178 | sec = secs[i]; | |
179 | bfd_set_section_vma (stdoutput, sec, addr); | |
180 | addr += bfd_section_size (stdoutput, sec); | |
181 | } | |
182 | for (i = n_names - 1; i >= 0; i--) | |
183 | if (secs[i]) | |
184 | { | |
185 | sec = secs[i]; | |
186 | sec->next = other_sections; | |
187 | other_sections = sec; | |
188 | } | |
189 | stdoutput->sections = other_sections; | |
190 | } | |
191 | ||
192 | /* Build the ECOFF debugging information. */ | |
193 | assert (ecoff_data (stdoutput) != 0); | |
194 | hdr = &ecoff_data (stdoutput)->debug_info.symbolic_header; | |
195 | ecoff_build_debug (hdr, &buf, debug_swap); | |
196 | ||
197 | /* Finish up the ecoff_tdata structure. */ | |
198 | set = buf; | |
199 | #define SET(ptr, count, type, size) \ | |
200 | if (hdr->count == 0) \ | |
201 | ecoff_data (stdoutput)->debug_info.ptr = (type) NULL; \ | |
202 | else \ | |
203 | { \ | |
204 | ecoff_data (stdoutput)->debug_info.ptr = (type) set; \ | |
205 | set += hdr->count * size; \ | |
206 | } | |
207 | ||
208 | SET (line, cbLine, unsigned char *, sizeof (unsigned char)); | |
209 | SET (external_dnr, idnMax, PTR, debug_swap->external_dnr_size); | |
210 | SET (external_pdr, ipdMax, PTR, debug_swap->external_pdr_size); | |
211 | SET (external_sym, isymMax, PTR, debug_swap->external_sym_size); | |
212 | SET (external_opt, ioptMax, PTR, debug_swap->external_opt_size); | |
213 | SET (external_aux, iauxMax, union aux_ext *, sizeof (union aux_ext)); | |
214 | SET (ss, issMax, char *, sizeof (char)); | |
215 | SET (ssext, issExtMax, char *, sizeof (char)); | |
216 | SET (external_rfd, crfd, PTR, debug_swap->external_rfd_size); | |
217 | SET (external_fdr, ifdMax, PTR, debug_swap->external_fdr_size); | |
218 | SET (external_ext, iextMax, PTR, debug_swap->external_ext_size); | |
219 | ||
220 | #undef SET | |
221 | ||
222 | /* Fill in the register masks. */ | |
223 | { | |
224 | unsigned long gprmask = 0; | |
225 | unsigned long fprmask = 0; | |
226 | unsigned long *cprmask = NULL; | |
227 | ||
228 | #ifdef TC_MIPS | |
229 | /* Fill in the MIPS register masks. It's probably not worth | |
230 | setting up a generic interface for this. */ | |
231 | gprmask = mips_gprmask; | |
232 | cprmask = mips_cprmask; | |
233 | #endif | |
234 | ||
235 | #ifdef TC_ALPHA | |
236 | alpha_frob_ecoff_data (); | |
237 | ||
238 | if (! bfd_ecoff_set_gp_value (stdoutput, alpha_gp_value)) | |
239 | as_fatal (_("Can't set GP value")); | |
240 | ||
241 | gprmask = alpha_gprmask; | |
242 | fprmask = alpha_fprmask; | |
243 | #endif | |
244 | ||
245 | if (! bfd_ecoff_set_regmasks (stdoutput, gprmask, fprmask, cprmask)) | |
246 | as_fatal (_("Can't set register masks")); | |
247 | } | |
248 | } | |
249 | ||
250 | /* This is called by the ECOFF code to set the external information | |
251 | for a symbol. We just pass it on to BFD, which expects the swapped | |
252 | information to be stored in the native field of the symbol. */ | |
253 | ||
254 | void | |
255 | obj_ecoff_set_ext (sym, ext) | |
256 | symbolS *sym; | |
257 | EXTR *ext; | |
258 | { | |
259 | const struct ecoff_debug_swap * const debug_swap | |
260 | = &ecoff_backend (stdoutput)->debug_swap; | |
261 | ecoff_symbol_type *esym; | |
262 | ||
fed9b18a ILT |
263 | know (bfd_asymbol_flavour (symbol_get_bfdsym (sym)) |
264 | == bfd_target_ecoff_flavour); | |
265 | esym = ecoffsymbol (symbol_get_bfdsym (sym)); | |
252b5132 RH |
266 | esym->local = false; |
267 | esym->native = xmalloc (debug_swap->external_ext_size); | |
268 | (*debug_swap->swap_ext_out) (stdoutput, ext, esym->native); | |
269 | } | |
270 | ||
271 | static int | |
272 | ecoff_sec_sym_ok_for_reloc (sec) | |
273 | asection *sec; | |
274 | { | |
275 | return 1; | |
276 | } | |
277 | ||
278 | static void | |
279 | obj_ecoff_frob_symbol (sym, puntp) | |
280 | symbolS *sym; | |
281 | int *puntp; | |
282 | { | |
283 | ecoff_frob_symbol (sym); | |
284 | } | |
285 | ||
286 | static void | |
287 | ecoff_pop_insert () | |
288 | { | |
289 | pop_insert (obj_pseudo_table); | |
290 | } | |
291 | ||
292 | const struct format_ops ecoff_format_ops = | |
293 | { | |
294 | bfd_target_ecoff_flavour, | |
295 | 0, | |
296 | 1, | |
297 | obj_ecoff_frob_symbol, | |
298 | ecoff_frob_file, | |
299 | 0, | |
300 | 0, 0, | |
301 | 0, 0, | |
302 | 0, | |
303 | ecoff_generate_asm_lineno, | |
304 | ecoff_stab, | |
305 | ecoff_sec_sym_ok_for_reloc, | |
306 | ecoff_pop_insert, | |
307 | ecoff_set_ext, | |
308 | ecoff_read_begin_hook, | |
309 | ecoff_symbol_new_hook, | |
310 | }; |