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252b5132 RH |
1 | /* BFD semi-generic back-end for a.out binaries. |
2 | Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 1998 | |
3 | Free Software Foundation, Inc. | |
4 | Written by Cygnus Support. | |
5 | ||
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 | ||
22 | /* | |
23 | SECTION | |
24 | a.out backends | |
25 | ||
26 | ||
27 | DESCRIPTION | |
28 | ||
29 | BFD supports a number of different flavours of a.out format, | |
30 | though the major differences are only the sizes of the | |
31 | structures on disk, and the shape of the relocation | |
32 | information. | |
33 | ||
34 | The support is split into a basic support file @file{aoutx.h} | |
35 | and other files which derive functions from the base. One | |
36 | derivation file is @file{aoutf1.h} (for a.out flavour 1), and | |
37 | adds to the basic a.out functions support for sun3, sun4, 386 | |
38 | and 29k a.out files, to create a target jump vector for a | |
39 | specific target. | |
40 | ||
41 | This information is further split out into more specific files | |
42 | for each machine, including @file{sunos.c} for sun3 and sun4, | |
43 | @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a | |
44 | demonstration of a 64 bit a.out format. | |
45 | ||
46 | The base file @file{aoutx.h} defines general mechanisms for | |
47 | reading and writing records to and from disk and various | |
48 | other methods which BFD requires. It is included by | |
49 | @file{aout32.c} and @file{aout64.c} to form the names | |
50 | <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc. | |
51 | ||
52 | As an example, this is what goes on to make the back end for a | |
53 | sun4, from @file{aout32.c}: | |
54 | ||
55 | | #define ARCH_SIZE 32 | |
56 | | #include "aoutx.h" | |
57 | ||
58 | Which exports names: | |
59 | ||
60 | | ... | |
61 | | aout_32_canonicalize_reloc | |
62 | | aout_32_find_nearest_line | |
63 | | aout_32_get_lineno | |
64 | | aout_32_get_reloc_upper_bound | |
65 | | ... | |
66 | ||
67 | from @file{sunos.c}: | |
68 | ||
69 | | #define TARGET_NAME "a.out-sunos-big" | |
70 | | #define VECNAME sunos_big_vec | |
71 | | #include "aoutf1.h" | |
72 | ||
73 | requires all the names from @file{aout32.c}, and produces the jump vector | |
74 | ||
75 | | sunos_big_vec | |
76 | ||
77 | The file @file{host-aout.c} is a special case. It is for a large set | |
78 | of hosts that use ``more or less standard'' a.out files, and | |
79 | for which cross-debugging is not interesting. It uses the | |
80 | standard 32-bit a.out support routines, but determines the | |
81 | file offsets and addresses of the text, data, and BSS | |
82 | sections, the machine architecture and machine type, and the | |
83 | entry point address, in a host-dependent manner. Once these | |
84 | values have been determined, generic code is used to handle | |
85 | the object file. | |
86 | ||
87 | When porting it to run on a new system, you must supply: | |
88 | ||
89 | | HOST_PAGE_SIZE | |
90 | | HOST_SEGMENT_SIZE | |
91 | | HOST_MACHINE_ARCH (optional) | |
92 | | HOST_MACHINE_MACHINE (optional) | |
93 | | HOST_TEXT_START_ADDR | |
94 | | HOST_STACK_END_ADDR | |
95 | ||
96 | in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These | |
97 | values, plus the structures and macros defined in @file{a.out.h} on | |
98 | your host system, will produce a BFD target that will access | |
99 | ordinary a.out files on your host. To configure a new machine | |
100 | to use @file{host-aout.c}, specify: | |
101 | ||
102 | | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec | |
103 | | TDEPFILES= host-aout.o trad-core.o | |
104 | ||
105 | in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in} | |
106 | to use the | |
107 | @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your | |
108 | configuration is selected. | |
109 | ||
110 | */ | |
111 | ||
112 | /* Some assumptions: | |
113 | * Any BFD with D_PAGED set is ZMAGIC, and vice versa. | |
114 | Doesn't matter what the setting of WP_TEXT is on output, but it'll | |
115 | get set on input. | |
116 | * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC. | |
117 | * Any BFD with both flags clear is OMAGIC. | |
118 | (Just want to make these explicit, so the conditions tested in this | |
119 | file make sense if you're more familiar with a.out than with BFD.) */ | |
120 | ||
121 | #define KEEPIT udata.i | |
122 | ||
123 | #include <ctype.h> | |
124 | #include "bfd.h" | |
125 | #include "sysdep.h" | |
126 | #include "bfdlink.h" | |
127 | ||
128 | #include "libaout.h" | |
129 | #include "libbfd.h" | |
130 | #include "aout/aout64.h" | |
131 | #include "aout/stab_gnu.h" | |
132 | #include "aout/ar.h" | |
133 | ||
134 | static boolean aout_get_external_symbols PARAMS ((bfd *)); | |
135 | static boolean translate_from_native_sym_flags | |
136 | PARAMS ((bfd *, aout_symbol_type *)); | |
137 | static boolean translate_to_native_sym_flags | |
138 | PARAMS ((bfd *, asymbol *, struct external_nlist *)); | |
139 | static void adjust_o_magic PARAMS ((bfd *, struct internal_exec *)); | |
140 | static void adjust_z_magic PARAMS ((bfd *, struct internal_exec *)); | |
141 | static void adjust_n_magic PARAMS ((bfd *, struct internal_exec *)); | |
142 | ||
143 | /* | |
144 | SUBSECTION | |
145 | Relocations | |
146 | ||
147 | DESCRIPTION | |
148 | The file @file{aoutx.h} provides for both the @emph{standard} | |
149 | and @emph{extended} forms of a.out relocation records. | |
150 | ||
151 | The standard records contain only an | |
152 | address, a symbol index, and a type field. The extended records | |
153 | (used on 29ks and sparcs) also have a full integer for an | |
154 | addend. | |
155 | ||
156 | */ | |
157 | #ifndef CTOR_TABLE_RELOC_HOWTO | |
158 | #define CTOR_TABLE_RELOC_IDX 2 | |
159 | #define CTOR_TABLE_RELOC_HOWTO(BFD) ((obj_reloc_entry_size(BFD) == RELOC_EXT_SIZE \ | |
160 | ? howto_table_ext : howto_table_std) \ | |
161 | + CTOR_TABLE_RELOC_IDX) | |
162 | #endif | |
163 | ||
164 | #ifndef MY_swap_std_reloc_in | |
165 | #define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in) | |
166 | #endif | |
167 | ||
168 | #ifndef MY_swap_std_reloc_out | |
169 | #define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out) | |
170 | #endif | |
171 | ||
172 | #ifndef MY_final_link_relocate | |
173 | #define MY_final_link_relocate _bfd_final_link_relocate | |
174 | #endif | |
175 | ||
176 | #ifndef MY_relocate_contents | |
177 | #define MY_relocate_contents _bfd_relocate_contents | |
178 | #endif | |
179 | ||
180 | #define howto_table_ext NAME(aout,ext_howto_table) | |
181 | #define howto_table_std NAME(aout,std_howto_table) | |
182 | ||
183 | reloc_howto_type howto_table_ext[] = | |
184 | { | |
185 | /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ | |
186 | HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false), | |
187 | HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false), | |
188 | HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false), | |
189 | HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false), | |
190 | HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false), | |
191 | HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false), | |
192 | HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false), | |
193 | HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false), | |
194 | HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false), | |
195 | HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false), | |
196 | HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false), | |
197 | HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false), | |
198 | HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false), | |
199 | HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false), | |
200 | HOWTO(RELOC_BASE10, 0, 2, 10, false, 0, complain_overflow_dont,0,"BASE10", false, 0,0x000003ff, false), | |
201 | HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_signed,0,"BASE13", false, 0,0x00001fff, false), | |
202 | HOWTO(RELOC_BASE22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x003fffff, false), | |
203 | HOWTO(RELOC_PC10, 0, 2, 10, true, 0, complain_overflow_dont,0,"PC10", false, 0,0x000003ff, true), | |
204 | HOWTO(RELOC_PC22, 10, 2, 22, true, 0, complain_overflow_signed,0,"PC22", false, 0,0x003fffff, true), | |
205 | HOWTO(RELOC_JMP_TBL,2, 2, 30, true, 0, complain_overflow_signed,0,"JMP_TBL", false, 0,0x3fffffff, false), | |
206 | HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false), | |
207 | HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false), | |
208 | HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false), | |
209 | HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false), | |
210 | HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true), | |
211 | HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true), | |
212 | #define RELOC_SPARC_REV32 RELOC_WDISP19 | |
213 | HOWTO(RELOC_SPARC_REV32, 0, 2, 32, false, 0, complain_overflow_dont,0,"R_SPARC_REV32", false, 0,0xffffffff, false), | |
214 | }; | |
215 | ||
216 | /* Convert standard reloc records to "arelent" format (incl byte swap). */ | |
217 | ||
218 | reloc_howto_type howto_table_std[] = { | |
219 | /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ | |
220 | HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false), | |
221 | HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false), | |
222 | HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false), | |
223 | HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false), | |
224 | HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false), | |
225 | HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false), | |
226 | HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false), | |
227 | HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false), | |
228 | HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"GOT_REL", false, 0,0x00000000, false), | |
229 | HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false), | |
230 | HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false), | |
231 | { -1 }, | |
232 | { -1 }, | |
233 | { -1 }, | |
234 | { -1 }, | |
235 | { -1 }, | |
236 | HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false), | |
237 | { -1 }, | |
238 | { -1 }, | |
239 | { -1 }, | |
240 | { -1 }, | |
241 | { -1 }, | |
242 | { -1 }, | |
243 | { -1 }, | |
244 | { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, | |
245 | HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false), | |
246 | { -1 }, | |
247 | { -1 }, | |
248 | { -1 }, | |
249 | { -1 }, | |
250 | { -1 }, | |
251 | { -1 }, | |
252 | { -1 }, | |
253 | HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false), | |
254 | }; | |
255 | ||
256 | #define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0])) | |
257 | ||
258 | reloc_howto_type * | |
259 | NAME(aout,reloc_type_lookup) (abfd,code) | |
260 | bfd *abfd; | |
261 | bfd_reloc_code_real_type code; | |
262 | { | |
263 | #define EXT(i,j) case i: return &howto_table_ext[j] | |
264 | #define STD(i,j) case i: return &howto_table_std[j] | |
265 | int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE; | |
266 | if (code == BFD_RELOC_CTOR) | |
267 | switch (bfd_get_arch_info (abfd)->bits_per_address) | |
268 | { | |
269 | case 32: | |
270 | code = BFD_RELOC_32; | |
271 | break; | |
272 | case 64: | |
273 | code = BFD_RELOC_64; | |
274 | break; | |
275 | } | |
276 | if (ext) | |
277 | switch (code) | |
278 | { | |
279 | EXT (BFD_RELOC_32, 2); | |
280 | EXT (BFD_RELOC_HI22, 8); | |
281 | EXT (BFD_RELOC_LO10, 11); | |
282 | EXT (BFD_RELOC_32_PCREL_S2, 6); | |
283 | EXT (BFD_RELOC_SPARC_WDISP22, 7); | |
284 | EXT (BFD_RELOC_SPARC13, 10); | |
285 | EXT (BFD_RELOC_SPARC_GOT10, 14); | |
286 | EXT (BFD_RELOC_SPARC_BASE13, 15); | |
287 | EXT (BFD_RELOC_SPARC_GOT13, 15); | |
288 | EXT (BFD_RELOC_SPARC_GOT22, 16); | |
289 | EXT (BFD_RELOC_SPARC_PC10, 17); | |
290 | EXT (BFD_RELOC_SPARC_PC22, 18); | |
291 | EXT (BFD_RELOC_SPARC_WPLT30, 19); | |
292 | EXT (BFD_RELOC_SPARC_REV32, 26); | |
293 | default: return (reloc_howto_type *) NULL; | |
294 | } | |
295 | else | |
296 | /* std relocs */ | |
297 | switch (code) | |
298 | { | |
299 | STD (BFD_RELOC_16, 1); | |
300 | STD (BFD_RELOC_32, 2); | |
301 | STD (BFD_RELOC_8_PCREL, 4); | |
302 | STD (BFD_RELOC_16_PCREL, 5); | |
303 | STD (BFD_RELOC_32_PCREL, 6); | |
304 | STD (BFD_RELOC_16_BASEREL, 9); | |
305 | STD (BFD_RELOC_32_BASEREL, 10); | |
306 | default: return (reloc_howto_type *) NULL; | |
307 | } | |
308 | } | |
309 | ||
310 | /* | |
311 | SUBSECTION | |
312 | Internal entry points | |
313 | ||
314 | DESCRIPTION | |
315 | @file{aoutx.h} exports several routines for accessing the | |
316 | contents of an a.out file, which are gathered and exported in | |
317 | turn by various format specific files (eg sunos.c). | |
318 | ||
319 | */ | |
320 | ||
321 | /* | |
322 | FUNCTION | |
323 | aout_@var{size}_swap_exec_header_in | |
324 | ||
325 | SYNOPSIS | |
326 | void aout_@var{size}_swap_exec_header_in, | |
327 | (bfd *abfd, | |
328 | struct external_exec *raw_bytes, | |
329 | struct internal_exec *execp); | |
330 | ||
331 | DESCRIPTION | |
332 | Swap the information in an executable header @var{raw_bytes} taken | |
333 | from a raw byte stream memory image into the internal exec header | |
334 | structure @var{execp}. | |
335 | */ | |
336 | ||
337 | #ifndef NAME_swap_exec_header_in | |
338 | void | |
339 | NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp) | |
340 | bfd *abfd; | |
341 | struct external_exec *raw_bytes; | |
342 | struct internal_exec *execp; | |
343 | { | |
344 | struct external_exec *bytes = (struct external_exec *)raw_bytes; | |
345 | ||
346 | /* The internal_exec structure has some fields that are unused in this | |
347 | configuration (IE for i960), so ensure that all such uninitialized | |
348 | fields are zero'd out. There are places where two of these structs | |
349 | are memcmp'd, and thus the contents do matter. */ | |
350 | memset ((PTR) execp, 0, sizeof (struct internal_exec)); | |
351 | /* Now fill in fields in the execp, from the bytes in the raw data. */ | |
352 | execp->a_info = bfd_h_get_32 (abfd, bytes->e_info); | |
353 | execp->a_text = GET_WORD (abfd, bytes->e_text); | |
354 | execp->a_data = GET_WORD (abfd, bytes->e_data); | |
355 | execp->a_bss = GET_WORD (abfd, bytes->e_bss); | |
356 | execp->a_syms = GET_WORD (abfd, bytes->e_syms); | |
357 | execp->a_entry = GET_WORD (abfd, bytes->e_entry); | |
358 | execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); | |
359 | execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); | |
360 | } | |
361 | #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in) | |
362 | #endif | |
363 | ||
364 | /* | |
365 | FUNCTION | |
366 | aout_@var{size}_swap_exec_header_out | |
367 | ||
368 | SYNOPSIS | |
369 | void aout_@var{size}_swap_exec_header_out | |
370 | (bfd *abfd, | |
371 | struct internal_exec *execp, | |
372 | struct external_exec *raw_bytes); | |
373 | ||
374 | DESCRIPTION | |
375 | Swap the information in an internal exec header structure | |
376 | @var{execp} into the buffer @var{raw_bytes} ready for writing to disk. | |
377 | */ | |
378 | void | |
379 | NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes) | |
380 | bfd *abfd; | |
381 | struct internal_exec *execp; | |
382 | struct external_exec *raw_bytes; | |
383 | { | |
384 | struct external_exec *bytes = (struct external_exec *)raw_bytes; | |
385 | ||
386 | /* Now fill in fields in the raw data, from the fields in the exec struct. */ | |
387 | bfd_h_put_32 (abfd, execp->a_info , bytes->e_info); | |
388 | PUT_WORD (abfd, execp->a_text , bytes->e_text); | |
389 | PUT_WORD (abfd, execp->a_data , bytes->e_data); | |
390 | PUT_WORD (abfd, execp->a_bss , bytes->e_bss); | |
391 | PUT_WORD (abfd, execp->a_syms , bytes->e_syms); | |
392 | PUT_WORD (abfd, execp->a_entry , bytes->e_entry); | |
393 | PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); | |
394 | PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); | |
395 | } | |
396 | ||
397 | /* Make all the section for an a.out file. */ | |
398 | ||
399 | boolean | |
400 | NAME(aout,make_sections) (abfd) | |
401 | bfd *abfd; | |
402 | { | |
403 | if (obj_textsec (abfd) == (asection *) NULL | |
404 | && bfd_make_section (abfd, ".text") == (asection *) NULL) | |
405 | return false; | |
406 | if (obj_datasec (abfd) == (asection *) NULL | |
407 | && bfd_make_section (abfd, ".data") == (asection *) NULL) | |
408 | return false; | |
409 | if (obj_bsssec (abfd) == (asection *) NULL | |
410 | && bfd_make_section (abfd, ".bss") == (asection *) NULL) | |
411 | return false; | |
412 | return true; | |
413 | } | |
414 | ||
415 | /* | |
416 | FUNCTION | |
417 | aout_@var{size}_some_aout_object_p | |
418 | ||
419 | SYNOPSIS | |
420 | const bfd_target *aout_@var{size}_some_aout_object_p | |
421 | (bfd *abfd, | |
422 | const bfd_target *(*callback_to_real_object_p)()); | |
423 | ||
424 | DESCRIPTION | |
425 | Some a.out variant thinks that the file open in @var{abfd} | |
426 | checking is an a.out file. Do some more checking, and set up | |
427 | for access if it really is. Call back to the calling | |
428 | environment's "finish up" function just before returning, to | |
429 | handle any last-minute setup. | |
430 | */ | |
431 | ||
432 | const bfd_target * | |
433 | NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p) | |
434 | bfd *abfd; | |
435 | struct internal_exec *execp; | |
436 | const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *)); | |
437 | { | |
438 | struct aout_data_struct *rawptr, *oldrawptr; | |
439 | const bfd_target *result; | |
440 | ||
441 | rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct )); | |
442 | if (rawptr == NULL) | |
443 | return 0; | |
444 | ||
445 | oldrawptr = abfd->tdata.aout_data; | |
446 | abfd->tdata.aout_data = rawptr; | |
447 | ||
448 | /* Copy the contents of the old tdata struct. | |
449 | In particular, we want the subformat, since for hpux it was set in | |
450 | hp300hpux.c:swap_exec_header_in and will be used in | |
451 | hp300hpux.c:callback. */ | |
452 | if (oldrawptr != NULL) | |
453 | *abfd->tdata.aout_data = *oldrawptr; | |
454 | ||
455 | abfd->tdata.aout_data->a.hdr = &rawptr->e; | |
456 | *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */ | |
457 | execp = abfd->tdata.aout_data->a.hdr; | |
458 | ||
459 | /* Set the file flags */ | |
460 | abfd->flags = BFD_NO_FLAGS; | |
461 | if (execp->a_drsize || execp->a_trsize) | |
462 | abfd->flags |= HAS_RELOC; | |
463 | /* Setting of EXEC_P has been deferred to the bottom of this function */ | |
464 | if (execp->a_syms) | |
465 | abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; | |
466 | if (N_DYNAMIC(*execp)) | |
467 | abfd->flags |= DYNAMIC; | |
468 | ||
469 | if (N_MAGIC (*execp) == ZMAGIC) | |
470 | { | |
471 | abfd->flags |= D_PAGED | WP_TEXT; | |
472 | adata (abfd).magic = z_magic; | |
473 | } | |
474 | else if (N_MAGIC (*execp) == QMAGIC) | |
475 | { | |
476 | abfd->flags |= D_PAGED | WP_TEXT; | |
477 | adata (abfd).magic = z_magic; | |
478 | adata (abfd).subformat = q_magic_format; | |
479 | } | |
480 | else if (N_MAGIC (*execp) == NMAGIC) | |
481 | { | |
482 | abfd->flags |= WP_TEXT; | |
483 | adata (abfd).magic = n_magic; | |
484 | } | |
485 | else if (N_MAGIC (*execp) == OMAGIC | |
486 | || N_MAGIC (*execp) == BMAGIC) | |
487 | adata (abfd).magic = o_magic; | |
488 | else | |
489 | { | |
490 | /* Should have been checked with N_BADMAG before this routine | |
491 | was called. */ | |
492 | abort (); | |
493 | } | |
494 | ||
495 | bfd_get_start_address (abfd) = execp->a_entry; | |
496 | ||
497 | obj_aout_symbols (abfd) = (aout_symbol_type *)NULL; | |
498 | bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); | |
499 | ||
500 | /* The default relocation entry size is that of traditional V7 Unix. */ | |
501 | obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; | |
502 | ||
503 | /* The default symbol entry size is that of traditional Unix. */ | |
504 | obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; | |
505 | ||
506 | #ifdef USE_MMAP | |
507 | bfd_init_window (&obj_aout_sym_window (abfd)); | |
508 | bfd_init_window (&obj_aout_string_window (abfd)); | |
509 | #endif | |
510 | obj_aout_external_syms (abfd) = NULL; | |
511 | obj_aout_external_strings (abfd) = NULL; | |
512 | obj_aout_sym_hashes (abfd) = NULL; | |
513 | ||
514 | if (! NAME(aout,make_sections) (abfd)) | |
515 | return NULL; | |
516 | ||
517 | obj_datasec (abfd)->_raw_size = execp->a_data; | |
518 | obj_bsssec (abfd)->_raw_size = execp->a_bss; | |
519 | ||
520 | obj_textsec (abfd)->flags = | |
521 | (execp->a_trsize != 0 | |
522 | ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) | |
523 | : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); | |
524 | obj_datasec (abfd)->flags = | |
525 | (execp->a_drsize != 0 | |
526 | ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) | |
527 | : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); | |
528 | obj_bsssec (abfd)->flags = SEC_ALLOC; | |
529 | ||
530 | #ifdef THIS_IS_ONLY_DOCUMENTATION | |
531 | /* The common code can't fill in these things because they depend | |
532 | on either the start address of the text segment, the rounding | |
533 | up of virtual addresses between segments, or the starting file | |
534 | position of the text segment -- all of which varies among different | |
535 | versions of a.out. */ | |
536 | ||
537 | /* Call back to the format-dependent code to fill in the rest of the | |
538 | fields and do any further cleanup. Things that should be filled | |
539 | in by the callback: */ | |
540 | ||
541 | struct exec *execp = exec_hdr (abfd); | |
542 | ||
543 | obj_textsec (abfd)->size = N_TXTSIZE(*execp); | |
544 | obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp); | |
545 | /* data and bss are already filled in since they're so standard */ | |
546 | ||
547 | /* The virtual memory addresses of the sections */ | |
548 | obj_textsec (abfd)->vma = N_TXTADDR(*execp); | |
549 | obj_datasec (abfd)->vma = N_DATADDR(*execp); | |
550 | obj_bsssec (abfd)->vma = N_BSSADDR(*execp); | |
551 | ||
552 | /* The file offsets of the sections */ | |
553 | obj_textsec (abfd)->filepos = N_TXTOFF(*execp); | |
554 | obj_datasec (abfd)->filepos = N_DATOFF(*execp); | |
555 | ||
556 | /* The file offsets of the relocation info */ | |
557 | obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp); | |
558 | obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp); | |
559 | ||
560 | /* The file offsets of the string table and symbol table. */ | |
561 | obj_str_filepos (abfd) = N_STROFF (*execp); | |
562 | obj_sym_filepos (abfd) = N_SYMOFF (*execp); | |
563 | ||
564 | /* Determine the architecture and machine type of the object file. */ | |
565 | switch (N_MACHTYPE (*exec_hdr (abfd))) { | |
566 | default: | |
567 | abfd->obj_arch = bfd_arch_obscure; | |
568 | break; | |
569 | } | |
570 | ||
571 | adata(abfd)->page_size = TARGET_PAGE_SIZE; | |
572 | adata(abfd)->segment_size = SEGMENT_SIZE; | |
573 | adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE; | |
574 | ||
575 | return abfd->xvec; | |
576 | ||
577 | /* The architecture is encoded in various ways in various a.out variants, | |
578 | or is not encoded at all in some of them. The relocation size depends | |
579 | on the architecture and the a.out variant. Finally, the return value | |
580 | is the bfd_target vector in use. If an error occurs, return zero and | |
581 | set bfd_error to the appropriate error code. | |
582 | ||
583 | Formats such as b.out, which have additional fields in the a.out | |
584 | header, should cope with them in this callback as well. */ | |
585 | #endif /* DOCUMENTATION */ | |
586 | ||
587 | result = (*callback_to_real_object_p)(abfd); | |
588 | ||
589 | /* Now that the segment addresses have been worked out, take a better | |
590 | guess at whether the file is executable. If the entry point | |
591 | is within the text segment, assume it is. (This makes files | |
592 | executable even if their entry point address is 0, as long as | |
593 | their text starts at zero.). | |
594 | ||
595 | This test had to be changed to deal with systems where the text segment | |
596 | runs at a different location than the default. The problem is that the | |
597 | entry address can appear to be outside the text segment, thus causing an | |
598 | erroneous conclusion that the file isn't executable. | |
599 | ||
600 | To fix this, we now accept any non-zero entry point as an indication of | |
601 | executability. This will work most of the time, since only the linker | |
602 | sets the entry point, and that is likely to be non-zero for most systems. */ | |
603 | ||
604 | if (execp->a_entry != 0 | |
605 | || (execp->a_entry >= obj_textsec(abfd)->vma | |
606 | && execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size)) | |
607 | abfd->flags |= EXEC_P; | |
608 | #ifdef STAT_FOR_EXEC | |
609 | else | |
610 | { | |
611 | struct stat stat_buf; | |
612 | ||
613 | /* The original heuristic doesn't work in some important cases. | |
614 | The a.out file has no information about the text start | |
615 | address. For files (like kernels) linked to non-standard | |
616 | addresses (ld -Ttext nnn) the entry point may not be between | |
617 | the default text start (obj_textsec(abfd)->vma) and | |
618 | (obj_textsec(abfd)->vma) + text size. This is not just a mach | |
619 | issue. Many kernels are loaded at non standard addresses. */ | |
620 | if (abfd->iostream != NULL | |
621 | && (abfd->flags & BFD_IN_MEMORY) == 0 | |
622 | && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0) | |
623 | && ((stat_buf.st_mode & 0111) != 0)) | |
624 | abfd->flags |= EXEC_P; | |
625 | } | |
626 | #endif /* STAT_FOR_EXEC */ | |
627 | ||
628 | if (result) | |
629 | { | |
630 | #if 0 /* These should be set correctly anyways. */ | |
631 | abfd->sections = obj_textsec (abfd); | |
632 | obj_textsec (abfd)->next = obj_datasec (abfd); | |
633 | obj_datasec (abfd)->next = obj_bsssec (abfd); | |
634 | #endif | |
635 | } | |
636 | else | |
637 | { | |
638 | free (rawptr); | |
639 | abfd->tdata.aout_data = oldrawptr; | |
640 | } | |
641 | return result; | |
642 | } | |
643 | ||
644 | /* | |
645 | FUNCTION | |
646 | aout_@var{size}_mkobject | |
647 | ||
648 | SYNOPSIS | |
649 | boolean aout_@var{size}_mkobject, (bfd *abfd); | |
650 | ||
651 | DESCRIPTION | |
652 | Initialize BFD @var{abfd} for use with a.out files. | |
653 | */ | |
654 | ||
655 | boolean | |
656 | NAME(aout,mkobject) (abfd) | |
657 | bfd *abfd; | |
658 | { | |
659 | struct aout_data_struct *rawptr; | |
660 | ||
661 | bfd_set_error (bfd_error_system_call); | |
662 | ||
663 | /* Use an intermediate variable for clarity */ | |
664 | rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct )); | |
665 | ||
666 | if (rawptr == NULL) | |
667 | return false; | |
668 | ||
669 | abfd->tdata.aout_data = rawptr; | |
670 | exec_hdr (abfd) = &(rawptr->e); | |
671 | ||
672 | obj_textsec (abfd) = (asection *)NULL; | |
673 | obj_datasec (abfd) = (asection *)NULL; | |
674 | obj_bsssec (abfd) = (asection *)NULL; | |
675 | ||
676 | return true; | |
677 | } | |
678 | ||
679 | ||
680 | /* | |
681 | FUNCTION | |
682 | aout_@var{size}_machine_type | |
683 | ||
684 | SYNOPSIS | |
685 | enum machine_type aout_@var{size}_machine_type | |
686 | (enum bfd_architecture arch, | |
687 | unsigned long machine)); | |
688 | ||
689 | DESCRIPTION | |
690 | Keep track of machine architecture and machine type for | |
691 | a.out's. Return the <<machine_type>> for a particular | |
692 | architecture and machine, or <<M_UNKNOWN>> if that exact architecture | |
693 | and machine can't be represented in a.out format. | |
694 | ||
695 | If the architecture is understood, machine type 0 (default) | |
696 | is always understood. | |
697 | */ | |
698 | ||
699 | enum machine_type | |
700 | NAME(aout,machine_type) (arch, machine, unknown) | |
701 | enum bfd_architecture arch; | |
702 | unsigned long machine; | |
703 | boolean *unknown; | |
704 | { | |
705 | enum machine_type arch_flags; | |
706 | ||
707 | arch_flags = M_UNKNOWN; | |
708 | *unknown = true; | |
709 | ||
710 | switch (arch) { | |
711 | case bfd_arch_sparc: | |
712 | if (machine == 0 | |
713 | || machine == bfd_mach_sparc | |
714 | || machine == bfd_mach_sparc_sparclite | |
715 | || machine == bfd_mach_sparc_sparclite_le | |
716 | || machine == bfd_mach_sparc_v9) | |
717 | arch_flags = M_SPARC; | |
718 | else if (machine == bfd_mach_sparc_sparclet) | |
719 | arch_flags = M_SPARCLET; | |
720 | break; | |
721 | ||
722 | case bfd_arch_m68k: | |
723 | switch (machine) { | |
724 | case 0: arch_flags = M_68010; break; | |
725 | case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = false; break; | |
726 | case bfd_mach_m68010: arch_flags = M_68010; break; | |
727 | case bfd_mach_m68020: arch_flags = M_68020; break; | |
728 | default: arch_flags = M_UNKNOWN; break; | |
729 | } | |
730 | break; | |
731 | ||
732 | case bfd_arch_i386: | |
733 | if (machine == 0) arch_flags = M_386; | |
734 | break; | |
735 | ||
736 | case bfd_arch_a29k: | |
737 | if (machine == 0) arch_flags = M_29K; | |
738 | break; | |
739 | ||
740 | case bfd_arch_arm: | |
741 | if (machine == 0) arch_flags = M_ARM; | |
742 | break; | |
743 | ||
744 | case bfd_arch_mips: | |
745 | switch (machine) { | |
746 | case 0: | |
747 | case bfd_mach_mips3000: | |
748 | case bfd_mach_mips3900: | |
749 | arch_flags = M_MIPS1; | |
750 | break; | |
751 | case bfd_mach_mips6000: | |
752 | arch_flags = M_MIPS2; | |
753 | break; | |
754 | case bfd_mach_mips4000: | |
755 | case bfd_mach_mips4010: | |
756 | case bfd_mach_mips4100: | |
757 | case bfd_mach_mips4300: | |
758 | case bfd_mach_mips4400: | |
759 | case bfd_mach_mips4600: | |
760 | case bfd_mach_mips4650: | |
761 | case bfd_mach_mips8000: | |
762 | case bfd_mach_mips10000: | |
763 | case bfd_mach_mips16: | |
764 | /* FIXME: These should be MIPS3 or MIPS4. */ | |
765 | arch_flags = M_MIPS2; | |
766 | break; | |
767 | default: | |
768 | arch_flags = M_UNKNOWN; | |
769 | break; | |
770 | } | |
771 | break; | |
772 | ||
773 | case bfd_arch_ns32k: | |
774 | switch (machine) { | |
775 | case 0: arch_flags = M_NS32532; break; | |
776 | case 32032: arch_flags = M_NS32032; break; | |
777 | case 32532: arch_flags = M_NS32532; break; | |
778 | default: arch_flags = M_UNKNOWN; break; | |
779 | } | |
780 | break; | |
781 | ||
782 | case bfd_arch_vax: | |
783 | *unknown = false; | |
784 | break; | |
785 | ||
786 | default: | |
787 | arch_flags = M_UNKNOWN; | |
788 | } | |
789 | ||
790 | if (arch_flags != M_UNKNOWN) | |
791 | *unknown = false; | |
792 | ||
793 | return arch_flags; | |
794 | } | |
795 | ||
796 | ||
797 | /* | |
798 | FUNCTION | |
799 | aout_@var{size}_set_arch_mach | |
800 | ||
801 | SYNOPSIS | |
802 | boolean aout_@var{size}_set_arch_mach, | |
803 | (bfd *, | |
804 | enum bfd_architecture arch, | |
805 | unsigned long machine)); | |
806 | ||
807 | DESCRIPTION | |
808 | Set the architecture and the machine of the BFD @var{abfd} to the | |
809 | values @var{arch} and @var{machine}. Verify that @var{abfd}'s format | |
810 | can support the architecture required. | |
811 | */ | |
812 | ||
813 | boolean | |
814 | NAME(aout,set_arch_mach) (abfd, arch, machine) | |
815 | bfd *abfd; | |
816 | enum bfd_architecture arch; | |
817 | unsigned long machine; | |
818 | { | |
819 | if (! bfd_default_set_arch_mach (abfd, arch, machine)) | |
820 | return false; | |
821 | ||
822 | if (arch != bfd_arch_unknown) | |
823 | { | |
824 | boolean unknown; | |
825 | ||
826 | NAME(aout,machine_type) (arch, machine, &unknown); | |
827 | if (unknown) | |
828 | return false; | |
829 | } | |
830 | ||
831 | /* Determine the size of a relocation entry */ | |
832 | switch (arch) { | |
833 | case bfd_arch_sparc: | |
834 | case bfd_arch_a29k: | |
835 | case bfd_arch_mips: | |
836 | obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; | |
837 | break; | |
838 | default: | |
839 | obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; | |
840 | break; | |
841 | } | |
842 | ||
843 | return (*aout_backend_info(abfd)->set_sizes) (abfd); | |
844 | } | |
845 | ||
846 | static void | |
847 | adjust_o_magic (abfd, execp) | |
848 | bfd *abfd; | |
849 | struct internal_exec *execp; | |
850 | { | |
851 | file_ptr pos = adata (abfd).exec_bytes_size; | |
852 | bfd_vma vma = 0; | |
853 | int pad = 0; | |
854 | ||
855 | /* Text. */ | |
856 | obj_textsec(abfd)->filepos = pos; | |
857 | if (!obj_textsec(abfd)->user_set_vma) | |
858 | obj_textsec(abfd)->vma = vma; | |
859 | else | |
860 | vma = obj_textsec(abfd)->vma; | |
861 | ||
862 | pos += obj_textsec(abfd)->_raw_size; | |
863 | vma += obj_textsec(abfd)->_raw_size; | |
864 | ||
865 | /* Data. */ | |
866 | if (!obj_datasec(abfd)->user_set_vma) | |
867 | { | |
868 | #if 0 /* ?? Does alignment in the file image really matter? */ | |
869 | pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma; | |
870 | #endif | |
871 | obj_textsec(abfd)->_raw_size += pad; | |
872 | pos += pad; | |
873 | vma += pad; | |
874 | obj_datasec(abfd)->vma = vma; | |
875 | } | |
876 | else | |
877 | vma = obj_datasec(abfd)->vma; | |
878 | obj_datasec(abfd)->filepos = pos; | |
879 | pos += obj_datasec(abfd)->_raw_size; | |
880 | vma += obj_datasec(abfd)->_raw_size; | |
881 | ||
882 | /* BSS. */ | |
883 | if (!obj_bsssec(abfd)->user_set_vma) | |
884 | { | |
885 | #if 0 | |
886 | pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma; | |
887 | #endif | |
888 | obj_datasec(abfd)->_raw_size += pad; | |
889 | pos += pad; | |
890 | vma += pad; | |
891 | obj_bsssec(abfd)->vma = vma; | |
892 | } | |
893 | else | |
894 | { | |
895 | /* The VMA of the .bss section is set by the the VMA of the | |
896 | .data section plus the size of the .data section. We may | |
897 | need to add padding bytes to make this true. */ | |
898 | pad = obj_bsssec (abfd)->vma - vma; | |
899 | if (pad > 0) | |
900 | { | |
901 | obj_datasec (abfd)->_raw_size += pad; | |
902 | pos += pad; | |
903 | } | |
904 | } | |
905 | obj_bsssec(abfd)->filepos = pos; | |
906 | ||
907 | /* Fix up the exec header. */ | |
908 | execp->a_text = obj_textsec(abfd)->_raw_size; | |
909 | execp->a_data = obj_datasec(abfd)->_raw_size; | |
910 | execp->a_bss = obj_bsssec(abfd)->_raw_size; | |
911 | N_SET_MAGIC (*execp, OMAGIC); | |
912 | } | |
913 | ||
914 | static void | |
915 | adjust_z_magic (abfd, execp) | |
916 | bfd *abfd; | |
917 | struct internal_exec *execp; | |
918 | { | |
919 | bfd_size_type data_pad, text_pad; | |
920 | file_ptr text_end; | |
921 | CONST struct aout_backend_data *abdp; | |
922 | int ztih; /* Nonzero if text includes exec header. */ | |
923 | ||
924 | abdp = aout_backend_info (abfd); | |
925 | ||
926 | /* Text. */ | |
927 | ztih = (abdp != NULL | |
928 | && (abdp->text_includes_header | |
929 | || obj_aout_subformat (abfd) == q_magic_format)); | |
930 | obj_textsec(abfd)->filepos = (ztih | |
931 | ? adata(abfd).exec_bytes_size | |
932 | : adata(abfd).zmagic_disk_block_size); | |
933 | if (! obj_textsec(abfd)->user_set_vma) | |
934 | { | |
935 | /* ?? Do we really need to check for relocs here? */ | |
936 | obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC) | |
937 | ? 0 | |
938 | : (ztih | |
939 | ? (abdp->default_text_vma | |
940 | + adata(abfd).exec_bytes_size) | |
941 | : abdp->default_text_vma)); | |
942 | text_pad = 0; | |
943 | } | |
944 | else | |
945 | { | |
946 | /* The .text section is being loaded at an unusual address. We | |
947 | may need to pad it such that the .data section starts at a page | |
948 | boundary. */ | |
949 | if (ztih) | |
950 | text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma) | |
951 | & (adata (abfd).page_size - 1)); | |
952 | else | |
953 | text_pad = ((- obj_textsec (abfd)->vma) | |
954 | & (adata (abfd).page_size - 1)); | |
955 | } | |
956 | ||
957 | /* Find start of data. */ | |
958 | if (ztih) | |
959 | { | |
960 | text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size; | |
961 | text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; | |
962 | } | |
963 | else | |
964 | { | |
965 | /* Note that if page_size == zmagic_disk_block_size, then | |
966 | filepos == page_size, and this case is the same as the ztih | |
967 | case. */ | |
968 | text_end = obj_textsec (abfd)->_raw_size; | |
969 | text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; | |
970 | text_end += obj_textsec (abfd)->filepos; | |
971 | } | |
972 | obj_textsec(abfd)->_raw_size += text_pad; | |
973 | text_end += text_pad; | |
974 | ||
975 | /* Data. */ | |
976 | if (!obj_datasec(abfd)->user_set_vma) | |
977 | { | |
978 | bfd_vma vma; | |
979 | vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size; | |
980 | obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size); | |
981 | } | |
982 | if (abdp && abdp->zmagic_mapped_contiguous) | |
983 | { | |
984 | text_pad = (obj_datasec(abfd)->vma | |
985 | - obj_textsec(abfd)->vma | |
986 | - obj_textsec(abfd)->_raw_size); | |
987 | obj_textsec(abfd)->_raw_size += text_pad; | |
988 | } | |
989 | obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos | |
990 | + obj_textsec(abfd)->_raw_size); | |
991 | ||
992 | /* Fix up exec header while we're at it. */ | |
993 | execp->a_text = obj_textsec(abfd)->_raw_size; | |
994 | if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted))) | |
995 | execp->a_text += adata(abfd).exec_bytes_size; | |
996 | if (obj_aout_subformat (abfd) == q_magic_format) | |
997 | N_SET_MAGIC (*execp, QMAGIC); | |
998 | else | |
999 | N_SET_MAGIC (*execp, ZMAGIC); | |
1000 | ||
1001 | /* Spec says data section should be rounded up to page boundary. */ | |
1002 | obj_datasec(abfd)->_raw_size | |
1003 | = align_power (obj_datasec(abfd)->_raw_size, | |
1004 | obj_bsssec(abfd)->alignment_power); | |
1005 | execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size, | |
1006 | adata(abfd).page_size); | |
1007 | data_pad = execp->a_data - obj_datasec(abfd)->_raw_size; | |
1008 | ||
1009 | /* BSS. */ | |
1010 | if (!obj_bsssec(abfd)->user_set_vma) | |
1011 | obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma | |
1012 | + obj_datasec(abfd)->_raw_size); | |
1013 | /* If the BSS immediately follows the data section and extra space | |
1014 | in the page is left after the data section, fudge data | |
1015 | in the header so that the bss section looks smaller by that | |
1016 | amount. We'll start the bss section there, and lie to the OS. | |
1017 | (Note that a linker script, as well as the above assignment, | |
1018 | could have explicitly set the BSS vma to immediately follow | |
1019 | the data section.) */ | |
1020 | if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power) | |
1021 | == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size) | |
1022 | execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 : | |
1023 | obj_bsssec(abfd)->_raw_size - data_pad; | |
1024 | else | |
1025 | execp->a_bss = obj_bsssec(abfd)->_raw_size; | |
1026 | } | |
1027 | ||
1028 | static void | |
1029 | adjust_n_magic (abfd, execp) | |
1030 | bfd *abfd; | |
1031 | struct internal_exec *execp; | |
1032 | { | |
1033 | file_ptr pos = adata(abfd).exec_bytes_size; | |
1034 | bfd_vma vma = 0; | |
1035 | int pad; | |
1036 | ||
1037 | /* Text. */ | |
1038 | obj_textsec(abfd)->filepos = pos; | |
1039 | if (!obj_textsec(abfd)->user_set_vma) | |
1040 | obj_textsec(abfd)->vma = vma; | |
1041 | else | |
1042 | vma = obj_textsec(abfd)->vma; | |
1043 | pos += obj_textsec(abfd)->_raw_size; | |
1044 | vma += obj_textsec(abfd)->_raw_size; | |
1045 | ||
1046 | /* Data. */ | |
1047 | obj_datasec(abfd)->filepos = pos; | |
1048 | if (!obj_datasec(abfd)->user_set_vma) | |
1049 | obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size); | |
1050 | vma = obj_datasec(abfd)->vma; | |
1051 | ||
1052 | /* Since BSS follows data immediately, see if it needs alignment. */ | |
1053 | vma += obj_datasec(abfd)->_raw_size; | |
1054 | pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma; | |
1055 | obj_datasec(abfd)->_raw_size += pad; | |
1056 | pos += obj_datasec(abfd)->_raw_size; | |
1057 | ||
1058 | /* BSS. */ | |
1059 | if (!obj_bsssec(abfd)->user_set_vma) | |
1060 | obj_bsssec(abfd)->vma = vma; | |
1061 | else | |
1062 | vma = obj_bsssec(abfd)->vma; | |
1063 | ||
1064 | /* Fix up exec header. */ | |
1065 | execp->a_text = obj_textsec(abfd)->_raw_size; | |
1066 | execp->a_data = obj_datasec(abfd)->_raw_size; | |
1067 | execp->a_bss = obj_bsssec(abfd)->_raw_size; | |
1068 | N_SET_MAGIC (*execp, NMAGIC); | |
1069 | } | |
1070 | ||
1071 | boolean | |
1072 | NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end) | |
1073 | bfd *abfd; | |
1074 | bfd_size_type *text_size; | |
1075 | file_ptr *text_end; | |
1076 | { | |
1077 | struct internal_exec *execp = exec_hdr (abfd); | |
1078 | ||
1079 | if (! NAME(aout,make_sections) (abfd)) | |
1080 | return false; | |
1081 | ||
1082 | if (adata(abfd).magic != undecided_magic) | |
1083 | return true; | |
1084 | ||
1085 | obj_textsec(abfd)->_raw_size = | |
1086 | align_power(obj_textsec(abfd)->_raw_size, | |
1087 | obj_textsec(abfd)->alignment_power); | |
1088 | ||
1089 | *text_size = obj_textsec (abfd)->_raw_size; | |
1090 | /* Rule (heuristic) for when to pad to a new page. Note that there | |
1091 | are (at least) two ways demand-paged (ZMAGIC) files have been | |
1092 | handled. Most Berkeley-based systems start the text segment at | |
1093 | (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text | |
1094 | segment right after the exec header; the latter is counted in the | |
1095 | text segment size, and is paged in by the kernel with the rest of | |
1096 | the text. */ | |
1097 | ||
1098 | /* This perhaps isn't the right way to do this, but made it simpler for me | |
1099 | to understand enough to implement it. Better would probably be to go | |
1100 | right from BFD flags to alignment/positioning characteristics. But the | |
1101 | old code was sloppy enough about handling the flags, and had enough | |
1102 | other magic, that it was a little hard for me to understand. I think | |
1103 | I understand it better now, but I haven't time to do the cleanup this | |
1104 | minute. */ | |
1105 | ||
1106 | if (abfd->flags & D_PAGED) | |
1107 | /* Whether or not WP_TEXT is set -- let D_PAGED override. */ | |
1108 | adata(abfd).magic = z_magic; | |
1109 | else if (abfd->flags & WP_TEXT) | |
1110 | adata(abfd).magic = n_magic; | |
1111 | else | |
1112 | adata(abfd).magic = o_magic; | |
1113 | ||
1114 | #ifdef BFD_AOUT_DEBUG /* requires gcc2 */ | |
1115 | #if __GNUC__ >= 2 | |
1116 | fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n", | |
1117 | ({ char *str; | |
1118 | switch (adata(abfd).magic) { | |
1119 | case n_magic: str = "NMAGIC"; break; | |
1120 | case o_magic: str = "OMAGIC"; break; | |
1121 | case z_magic: str = "ZMAGIC"; break; | |
1122 | default: abort (); | |
1123 | } | |
1124 | str; | |
1125 | }), | |
1126 | obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size, | |
1127 | obj_textsec(abfd)->alignment_power, | |
1128 | obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size, | |
1129 | obj_datasec(abfd)->alignment_power, | |
1130 | obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size, | |
1131 | obj_bsssec(abfd)->alignment_power); | |
1132 | #endif | |
1133 | #endif | |
1134 | ||
1135 | switch (adata(abfd).magic) | |
1136 | { | |
1137 | case o_magic: | |
1138 | adjust_o_magic (abfd, execp); | |
1139 | break; | |
1140 | case z_magic: | |
1141 | adjust_z_magic (abfd, execp); | |
1142 | break; | |
1143 | case n_magic: | |
1144 | adjust_n_magic (abfd, execp); | |
1145 | break; | |
1146 | default: | |
1147 | abort (); | |
1148 | } | |
1149 | ||
1150 | #ifdef BFD_AOUT_DEBUG | |
1151 | fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n", | |
1152 | obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size, | |
1153 | obj_textsec(abfd)->filepos, | |
1154 | obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size, | |
1155 | obj_datasec(abfd)->filepos, | |
1156 | obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size); | |
1157 | #endif | |
1158 | ||
1159 | return true; | |
1160 | } | |
1161 | ||
1162 | /* | |
1163 | FUNCTION | |
1164 | aout_@var{size}_new_section_hook | |
1165 | ||
1166 | SYNOPSIS | |
1167 | boolean aout_@var{size}_new_section_hook, | |
1168 | (bfd *abfd, | |
1169 | asection *newsect)); | |
1170 | ||
1171 | DESCRIPTION | |
1172 | Called by the BFD in response to a @code{bfd_make_section} | |
1173 | request. | |
1174 | */ | |
1175 | boolean | |
1176 | NAME(aout,new_section_hook) (abfd, newsect) | |
1177 | bfd *abfd; | |
1178 | asection *newsect; | |
1179 | { | |
1180 | /* align to double at least */ | |
1181 | newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power; | |
1182 | ||
1183 | ||
1184 | if (bfd_get_format (abfd) == bfd_object) | |
1185 | { | |
1186 | if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) { | |
1187 | obj_textsec(abfd)= newsect; | |
1188 | newsect->target_index = N_TEXT; | |
1189 | return true; | |
1190 | } | |
1191 | ||
1192 | if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) { | |
1193 | obj_datasec(abfd) = newsect; | |
1194 | newsect->target_index = N_DATA; | |
1195 | return true; | |
1196 | } | |
1197 | ||
1198 | if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) { | |
1199 | obj_bsssec(abfd) = newsect; | |
1200 | newsect->target_index = N_BSS; | |
1201 | return true; | |
1202 | } | |
1203 | ||
1204 | } | |
1205 | ||
1206 | /* We allow more than three sections internally */ | |
1207 | return true; | |
1208 | } | |
1209 | ||
1210 | boolean | |
1211 | NAME(aout,set_section_contents) (abfd, section, location, offset, count) | |
1212 | bfd *abfd; | |
1213 | sec_ptr section; | |
1214 | PTR location; | |
1215 | file_ptr offset; | |
1216 | bfd_size_type count; | |
1217 | { | |
1218 | file_ptr text_end; | |
1219 | bfd_size_type text_size; | |
1220 | ||
1221 | if (! abfd->output_has_begun) | |
1222 | { | |
1223 | if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) | |
1224 | return false; | |
1225 | } | |
1226 | ||
1227 | if (section == obj_bsssec (abfd)) | |
1228 | { | |
1229 | bfd_set_error (bfd_error_no_contents); | |
1230 | return false; | |
1231 | } | |
1232 | ||
1233 | if (section != obj_textsec (abfd) | |
1234 | && section != obj_datasec (abfd)) | |
1235 | { | |
1236 | (*_bfd_error_handler) | |
1237 | (_("%s: can not represent section `%s' in a.out object file format"), | |
1238 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); | |
1239 | bfd_set_error (bfd_error_nonrepresentable_section); | |
1240 | return false; | |
1241 | } | |
1242 | ||
1243 | if (count != 0) | |
1244 | { | |
1245 | if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 | |
1246 | || bfd_write (location, 1, count, abfd) != count) | |
1247 | return false; | |
1248 | } | |
1249 | ||
1250 | return true; | |
1251 | } | |
1252 | \f | |
1253 | /* Read the external symbols from an a.out file. */ | |
1254 | ||
1255 | static boolean | |
1256 | aout_get_external_symbols (abfd) | |
1257 | bfd *abfd; | |
1258 | { | |
1259 | if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL) | |
1260 | { | |
1261 | bfd_size_type count; | |
1262 | struct external_nlist *syms; | |
1263 | ||
1264 | count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE; | |
1265 | ||
1266 | #ifdef USE_MMAP | |
1267 | if (bfd_get_file_window (abfd, | |
1268 | obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms, | |
1269 | &obj_aout_sym_window (abfd), true) == false) | |
1270 | return false; | |
1271 | syms = (struct external_nlist *) obj_aout_sym_window (abfd).data; | |
1272 | #else | |
1273 | /* We allocate using malloc to make the values easy to free | |
1274 | later on. If we put them on the objalloc it might not be | |
1275 | possible to free them. */ | |
1276 | syms = ((struct external_nlist *) | |
1277 | bfd_malloc ((size_t) count * EXTERNAL_NLIST_SIZE)); | |
1278 | if (syms == (struct external_nlist *) NULL && count != 0) | |
1279 | return false; | |
1280 | ||
1281 | if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 | |
1282 | || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd) | |
1283 | != exec_hdr (abfd)->a_syms)) | |
1284 | { | |
1285 | free (syms); | |
1286 | return false; | |
1287 | } | |
1288 | #endif | |
1289 | ||
1290 | obj_aout_external_syms (abfd) = syms; | |
1291 | obj_aout_external_sym_count (abfd) = count; | |
1292 | } | |
1293 | ||
1294 | if (obj_aout_external_strings (abfd) == NULL | |
1295 | && exec_hdr (abfd)->a_syms != 0) | |
1296 | { | |
1297 | unsigned char string_chars[BYTES_IN_WORD]; | |
1298 | bfd_size_type stringsize; | |
1299 | char *strings; | |
1300 | ||
1301 | /* Get the size of the strings. */ | |
1302 | if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 | |
1303 | || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd) | |
1304 | != BYTES_IN_WORD)) | |
1305 | return false; | |
1306 | stringsize = GET_WORD (abfd, string_chars); | |
1307 | ||
1308 | #ifdef USE_MMAP | |
1309 | if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize, | |
1310 | &obj_aout_string_window (abfd), true) == false) | |
1311 | return false; | |
1312 | strings = (char *) obj_aout_string_window (abfd).data; | |
1313 | #else | |
1314 | strings = (char *) bfd_malloc ((size_t) stringsize + 1); | |
1315 | if (strings == NULL) | |
1316 | return false; | |
1317 | ||
1318 | /* Skip space for the string count in the buffer for convenience | |
1319 | when using indexes. */ | |
1320 | if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD, | |
1321 | abfd) | |
1322 | != stringsize - BYTES_IN_WORD) | |
1323 | { | |
1324 | free (strings); | |
1325 | return false; | |
1326 | } | |
1327 | #endif | |
1328 | ||
1329 | /* Ensure that a zero index yields an empty string. */ | |
1330 | strings[0] = '\0'; | |
1331 | ||
1332 | strings[stringsize - 1] = 0; | |
1333 | ||
1334 | obj_aout_external_strings (abfd) = strings; | |
1335 | obj_aout_external_string_size (abfd) = stringsize; | |
1336 | } | |
1337 | ||
1338 | return true; | |
1339 | } | |
1340 | ||
1341 | /* Translate an a.out symbol into a BFD symbol. The desc, other, type | |
1342 | and symbol->value fields of CACHE_PTR will be set from the a.out | |
1343 | nlist structure. This function is responsible for setting | |
1344 | symbol->flags and symbol->section, and adjusting symbol->value. */ | |
1345 | ||
1346 | static boolean | |
1347 | translate_from_native_sym_flags (abfd, cache_ptr) | |
1348 | bfd *abfd; | |
1349 | aout_symbol_type *cache_ptr; | |
1350 | { | |
1351 | flagword visible; | |
1352 | ||
1353 | if ((cache_ptr->type & N_STAB) != 0 | |
1354 | || cache_ptr->type == N_FN) | |
1355 | { | |
1356 | asection *sec; | |
1357 | ||
1358 | /* This is a debugging symbol. */ | |
1359 | ||
1360 | cache_ptr->symbol.flags = BSF_DEBUGGING; | |
1361 | ||
1362 | /* Work out the symbol section. */ | |
1363 | switch (cache_ptr->type & N_TYPE) | |
1364 | { | |
1365 | case N_TEXT: | |
1366 | case N_FN: | |
1367 | sec = obj_textsec (abfd); | |
1368 | break; | |
1369 | case N_DATA: | |
1370 | sec = obj_datasec (abfd); | |
1371 | break; | |
1372 | case N_BSS: | |
1373 | sec = obj_bsssec (abfd); | |
1374 | break; | |
1375 | default: | |
1376 | case N_ABS: | |
1377 | sec = bfd_abs_section_ptr; | |
1378 | break; | |
1379 | } | |
1380 | ||
1381 | cache_ptr->symbol.section = sec; | |
1382 | cache_ptr->symbol.value -= sec->vma; | |
1383 | ||
1384 | return true; | |
1385 | } | |
1386 | ||
1387 | /* Get the default visibility. This does not apply to all types, so | |
1388 | we just hold it in a local variable to use if wanted. */ | |
1389 | if ((cache_ptr->type & N_EXT) == 0) | |
1390 | visible = BSF_LOCAL; | |
1391 | else | |
1392 | visible = BSF_GLOBAL; | |
1393 | ||
1394 | switch (cache_ptr->type) | |
1395 | { | |
1396 | default: | |
1397 | case N_ABS: case N_ABS | N_EXT: | |
1398 | cache_ptr->symbol.section = bfd_abs_section_ptr; | |
1399 | cache_ptr->symbol.flags = visible; | |
1400 | break; | |
1401 | ||
1402 | case N_UNDF | N_EXT: | |
1403 | if (cache_ptr->symbol.value != 0) | |
1404 | { | |
1405 | /* This is a common symbol. */ | |
1406 | cache_ptr->symbol.flags = BSF_GLOBAL; | |
1407 | cache_ptr->symbol.section = bfd_com_section_ptr; | |
1408 | } | |
1409 | else | |
1410 | { | |
1411 | cache_ptr->symbol.flags = 0; | |
1412 | cache_ptr->symbol.section = bfd_und_section_ptr; | |
1413 | } | |
1414 | break; | |
1415 | ||
1416 | case N_TEXT: case N_TEXT | N_EXT: | |
1417 | cache_ptr->symbol.section = obj_textsec (abfd); | |
1418 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; | |
1419 | cache_ptr->symbol.flags = visible; | |
1420 | break; | |
1421 | ||
1422 | /* N_SETV symbols used to represent set vectors placed in the | |
1423 | data section. They are no longer generated. Theoretically, | |
1424 | it was possible to extract the entries and combine them with | |
1425 | new ones, although I don't know if that was ever actually | |
1426 | done. Unless that feature is restored, treat them as data | |
1427 | symbols. */ | |
1428 | case N_SETV: case N_SETV | N_EXT: | |
1429 | case N_DATA: case N_DATA | N_EXT: | |
1430 | cache_ptr->symbol.section = obj_datasec (abfd); | |
1431 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; | |
1432 | cache_ptr->symbol.flags = visible; | |
1433 | break; | |
1434 | ||
1435 | case N_BSS: case N_BSS | N_EXT: | |
1436 | cache_ptr->symbol.section = obj_bsssec (abfd); | |
1437 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; | |
1438 | cache_ptr->symbol.flags = visible; | |
1439 | break; | |
1440 | ||
1441 | case N_SETA: case N_SETA | N_EXT: | |
1442 | case N_SETT: case N_SETT | N_EXT: | |
1443 | case N_SETD: case N_SETD | N_EXT: | |
1444 | case N_SETB: case N_SETB | N_EXT: | |
1445 | { | |
1446 | /* This code is no longer needed. It used to be used to make | |
1447 | the linker handle set symbols, but they are now handled in | |
1448 | the add_symbols routine instead. */ | |
1449 | #if 0 | |
1450 | asection *section; | |
1451 | arelent_chain *reloc; | |
1452 | asection *into_section; | |
1453 | ||
1454 | /* This is a set symbol. The name of the symbol is the name | |
1455 | of the set (e.g., __CTOR_LIST__). The value of the symbol | |
1456 | is the value to add to the set. We create a section with | |
1457 | the same name as the symbol, and add a reloc to insert the | |
1458 | appropriate value into the section. | |
1459 | ||
1460 | This action is actually obsolete; it used to make the | |
1461 | linker do the right thing, but the linker no longer uses | |
1462 | this function. */ | |
1463 | ||
1464 | section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name); | |
1465 | if (section == NULL) | |
1466 | { | |
1467 | char *copy; | |
1468 | ||
1469 | copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1); | |
1470 | if (copy == NULL) | |
1471 | return false; | |
1472 | ||
1473 | strcpy (copy, cache_ptr->symbol.name); | |
1474 | section = bfd_make_section (abfd, copy); | |
1475 | if (section == NULL) | |
1476 | return false; | |
1477 | } | |
1478 | ||
1479 | reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain)); | |
1480 | if (reloc == NULL) | |
1481 | return false; | |
1482 | ||
1483 | /* Build a relocation entry for the constructor. */ | |
1484 | switch (cache_ptr->type & N_TYPE) | |
1485 | { | |
1486 | case N_SETA: | |
1487 | into_section = bfd_abs_section_ptr; | |
1488 | cache_ptr->type = N_ABS; | |
1489 | break; | |
1490 | case N_SETT: | |
1491 | into_section = obj_textsec (abfd); | |
1492 | cache_ptr->type = N_TEXT; | |
1493 | break; | |
1494 | case N_SETD: | |
1495 | into_section = obj_datasec (abfd); | |
1496 | cache_ptr->type = N_DATA; | |
1497 | break; | |
1498 | case N_SETB: | |
1499 | into_section = obj_bsssec (abfd); | |
1500 | cache_ptr->type = N_BSS; | |
1501 | break; | |
1502 | } | |
1503 | ||
1504 | /* Build a relocation pointing into the constructor section | |
1505 | pointing at the symbol in the set vector specified. */ | |
1506 | reloc->relent.addend = cache_ptr->symbol.value; | |
1507 | cache_ptr->symbol.section = into_section; | |
1508 | reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr; | |
1509 | ||
1510 | /* We modify the symbol to belong to a section depending upon | |
1511 | the name of the symbol, and add to the size of the section | |
1512 | to contain a pointer to the symbol. Build a reloc entry to | |
1513 | relocate to this symbol attached to this section. */ | |
1514 | section->flags = SEC_CONSTRUCTOR | SEC_RELOC; | |
1515 | ||
1516 | section->reloc_count++; | |
1517 | section->alignment_power = 2; | |
1518 | ||
1519 | reloc->next = section->constructor_chain; | |
1520 | section->constructor_chain = reloc; | |
1521 | reloc->relent.address = section->_raw_size; | |
1522 | section->_raw_size += BYTES_IN_WORD; | |
1523 | ||
1524 | reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd); | |
1525 | ||
1526 | #endif /* 0 */ | |
1527 | ||
1528 | switch (cache_ptr->type & N_TYPE) | |
1529 | { | |
1530 | case N_SETA: | |
1531 | cache_ptr->symbol.section = bfd_abs_section_ptr; | |
1532 | break; | |
1533 | case N_SETT: | |
1534 | cache_ptr->symbol.section = obj_textsec (abfd); | |
1535 | break; | |
1536 | case N_SETD: | |
1537 | cache_ptr->symbol.section = obj_datasec (abfd); | |
1538 | break; | |
1539 | case N_SETB: | |
1540 | cache_ptr->symbol.section = obj_bsssec (abfd); | |
1541 | break; | |
1542 | } | |
1543 | ||
1544 | cache_ptr->symbol.flags |= BSF_CONSTRUCTOR; | |
1545 | } | |
1546 | break; | |
1547 | ||
1548 | case N_WARNING: | |
1549 | /* This symbol is the text of a warning message. The next | |
1550 | symbol is the symbol to associate the warning with. If a | |
1551 | reference is made to that symbol, a warning is issued. */ | |
1552 | cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING; | |
1553 | cache_ptr->symbol.section = bfd_abs_section_ptr; | |
1554 | break; | |
1555 | ||
1556 | case N_INDR: case N_INDR | N_EXT: | |
1557 | /* An indirect symbol. This consists of two symbols in a row. | |
1558 | The first symbol is the name of the indirection. The second | |
1559 | symbol is the name of the target. A reference to the first | |
1560 | symbol becomes a reference to the second. */ | |
1561 | cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible; | |
1562 | cache_ptr->symbol.section = bfd_ind_section_ptr; | |
1563 | break; | |
1564 | ||
1565 | case N_WEAKU: | |
1566 | cache_ptr->symbol.section = bfd_und_section_ptr; | |
1567 | cache_ptr->symbol.flags = BSF_WEAK; | |
1568 | break; | |
1569 | ||
1570 | case N_WEAKA: | |
1571 | cache_ptr->symbol.section = bfd_abs_section_ptr; | |
1572 | cache_ptr->symbol.flags = BSF_WEAK; | |
1573 | break; | |
1574 | ||
1575 | case N_WEAKT: | |
1576 | cache_ptr->symbol.section = obj_textsec (abfd); | |
1577 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; | |
1578 | cache_ptr->symbol.flags = BSF_WEAK; | |
1579 | break; | |
1580 | ||
1581 | case N_WEAKD: | |
1582 | cache_ptr->symbol.section = obj_datasec (abfd); | |
1583 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; | |
1584 | cache_ptr->symbol.flags = BSF_WEAK; | |
1585 | break; | |
1586 | ||
1587 | case N_WEAKB: | |
1588 | cache_ptr->symbol.section = obj_bsssec (abfd); | |
1589 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; | |
1590 | cache_ptr->symbol.flags = BSF_WEAK; | |
1591 | break; | |
1592 | } | |
1593 | ||
1594 | return true; | |
1595 | } | |
1596 | ||
1597 | /* Set the fields of SYM_POINTER according to CACHE_PTR. */ | |
1598 | ||
1599 | static boolean | |
1600 | translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer) | |
1601 | bfd *abfd; | |
1602 | asymbol *cache_ptr; | |
1603 | struct external_nlist *sym_pointer; | |
1604 | { | |
1605 | bfd_vma value = cache_ptr->value; | |
1606 | asection *sec; | |
1607 | bfd_vma off; | |
1608 | ||
1609 | /* Mask out any existing type bits in case copying from one section | |
1610 | to another. */ | |
1611 | sym_pointer->e_type[0] &= ~N_TYPE; | |
1612 | ||
1613 | sec = bfd_get_section (cache_ptr); | |
1614 | off = 0; | |
1615 | ||
1616 | if (sec == NULL) | |
1617 | { | |
1618 | /* This case occurs, e.g., for the *DEBUG* section of a COFF | |
1619 | file. */ | |
1620 | (*_bfd_error_handler) | |
1621 | (_("%s: can not represent section for symbol `%s' in a.out object file format"), | |
1622 | bfd_get_filename (abfd), | |
1623 | cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*")); | |
1624 | bfd_set_error (bfd_error_nonrepresentable_section); | |
1625 | return false; | |
1626 | } | |
1627 | ||
1628 | if (sec->output_section != NULL) | |
1629 | { | |
1630 | off = sec->output_offset; | |
1631 | sec = sec->output_section; | |
1632 | } | |
1633 | ||
1634 | if (bfd_is_abs_section (sec)) | |
1635 | sym_pointer->e_type[0] |= N_ABS; | |
1636 | else if (sec == obj_textsec (abfd)) | |
1637 | sym_pointer->e_type[0] |= N_TEXT; | |
1638 | else if (sec == obj_datasec (abfd)) | |
1639 | sym_pointer->e_type[0] |= N_DATA; | |
1640 | else if (sec == obj_bsssec (abfd)) | |
1641 | sym_pointer->e_type[0] |= N_BSS; | |
1642 | else if (bfd_is_und_section (sec)) | |
1643 | sym_pointer->e_type[0] = N_UNDF | N_EXT; | |
1644 | else if (bfd_is_ind_section (sec)) | |
1645 | sym_pointer->e_type[0] = N_INDR; | |
1646 | else if (bfd_is_com_section (sec)) | |
1647 | sym_pointer->e_type[0] = N_UNDF | N_EXT; | |
1648 | else | |
1649 | { | |
1650 | (*_bfd_error_handler) | |
1651 | (_("%s: can not represent section `%s' in a.out object file format"), | |
1652 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sec)); | |
1653 | bfd_set_error (bfd_error_nonrepresentable_section); | |
1654 | return false; | |
1655 | } | |
1656 | ||
1657 | /* Turn the symbol from section relative to absolute again */ | |
1658 | value += sec->vma + off; | |
1659 | ||
1660 | if ((cache_ptr->flags & BSF_WARNING) != 0) | |
1661 | sym_pointer->e_type[0] = N_WARNING; | |
1662 | ||
1663 | if ((cache_ptr->flags & BSF_DEBUGGING) != 0) | |
1664 | sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type; | |
1665 | else if ((cache_ptr->flags & BSF_GLOBAL) != 0) | |
1666 | sym_pointer->e_type[0] |= N_EXT; | |
1667 | ||
1668 | if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0) | |
1669 | { | |
1670 | int type = ((aout_symbol_type *) cache_ptr)->type; | |
1671 | switch (type) | |
1672 | { | |
1673 | case N_ABS: type = N_SETA; break; | |
1674 | case N_TEXT: type = N_SETT; break; | |
1675 | case N_DATA: type = N_SETD; break; | |
1676 | case N_BSS: type = N_SETB; break; | |
1677 | } | |
1678 | sym_pointer->e_type[0] = type; | |
1679 | } | |
1680 | ||
1681 | if ((cache_ptr->flags & BSF_WEAK) != 0) | |
1682 | { | |
1683 | int type; | |
1684 | ||
1685 | switch (sym_pointer->e_type[0] & N_TYPE) | |
1686 | { | |
1687 | default: | |
1688 | case N_ABS: type = N_WEAKA; break; | |
1689 | case N_TEXT: type = N_WEAKT; break; | |
1690 | case N_DATA: type = N_WEAKD; break; | |
1691 | case N_BSS: type = N_WEAKB; break; | |
1692 | case N_UNDF: type = N_WEAKU; break; | |
1693 | } | |
1694 | sym_pointer->e_type[0] = type; | |
1695 | } | |
1696 | ||
1697 | PUT_WORD(abfd, value, sym_pointer->e_value); | |
1698 | ||
1699 | return true; | |
1700 | } | |
1701 | \f | |
1702 | /* Native-level interface to symbols. */ | |
1703 | ||
1704 | asymbol * | |
1705 | NAME(aout,make_empty_symbol) (abfd) | |
1706 | bfd *abfd; | |
1707 | { | |
1708 | aout_symbol_type *new = | |
1709 | (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type)); | |
1710 | if (!new) | |
1711 | return NULL; | |
1712 | new->symbol.the_bfd = abfd; | |
1713 | ||
1714 | return &new->symbol; | |
1715 | } | |
1716 | ||
1717 | /* Translate a set of internal symbols into external symbols. */ | |
1718 | ||
1719 | boolean | |
1720 | NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic) | |
1721 | bfd *abfd; | |
1722 | aout_symbol_type *in; | |
1723 | struct external_nlist *ext; | |
1724 | bfd_size_type count; | |
1725 | char *str; | |
1726 | bfd_size_type strsize; | |
1727 | boolean dynamic; | |
1728 | { | |
1729 | struct external_nlist *ext_end; | |
1730 | ||
1731 | ext_end = ext + count; | |
1732 | for (; ext < ext_end; ext++, in++) | |
1733 | { | |
1734 | bfd_vma x; | |
1735 | ||
1736 | x = GET_WORD (abfd, ext->e_strx); | |
1737 | in->symbol.the_bfd = abfd; | |
1738 | ||
1739 | /* For the normal symbols, the zero index points at the number | |
1740 | of bytes in the string table but is to be interpreted as the | |
1741 | null string. For the dynamic symbols, the number of bytes in | |
1742 | the string table is stored in the __DYNAMIC structure and the | |
1743 | zero index points at an actual string. */ | |
1744 | if (x == 0 && ! dynamic) | |
1745 | in->symbol.name = ""; | |
1746 | else if (x < strsize) | |
1747 | in->symbol.name = str + x; | |
1748 | else | |
1749 | return false; | |
1750 | ||
1751 | in->symbol.value = GET_SWORD (abfd, ext->e_value); | |
1752 | in->desc = bfd_h_get_16 (abfd, ext->e_desc); | |
1753 | in->other = bfd_h_get_8 (abfd, ext->e_other); | |
1754 | in->type = bfd_h_get_8 (abfd, ext->e_type); | |
1755 | in->symbol.udata.p = NULL; | |
1756 | ||
1757 | if (! translate_from_native_sym_flags (abfd, in)) | |
1758 | return false; | |
1759 | ||
1760 | if (dynamic) | |
1761 | in->symbol.flags |= BSF_DYNAMIC; | |
1762 | } | |
1763 | ||
1764 | return true; | |
1765 | } | |
1766 | ||
1767 | /* We read the symbols into a buffer, which is discarded when this | |
1768 | function exits. We read the strings into a buffer large enough to | |
1769 | hold them all plus all the cached symbol entries. */ | |
1770 | ||
1771 | boolean | |
1772 | NAME(aout,slurp_symbol_table) (abfd) | |
1773 | bfd *abfd; | |
1774 | { | |
1775 | struct external_nlist *old_external_syms; | |
1776 | aout_symbol_type *cached; | |
1777 | size_t cached_size; | |
1778 | ||
1779 | /* If there's no work to be done, don't do any */ | |
1780 | if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL) | |
1781 | return true; | |
1782 | ||
1783 | old_external_syms = obj_aout_external_syms (abfd); | |
1784 | ||
1785 | if (! aout_get_external_symbols (abfd)) | |
1786 | return false; | |
1787 | ||
1788 | cached_size = (obj_aout_external_sym_count (abfd) | |
1789 | * sizeof (aout_symbol_type)); | |
1790 | cached = (aout_symbol_type *) bfd_malloc (cached_size); | |
1791 | if (cached == NULL && cached_size != 0) | |
1792 | return false; | |
1793 | if (cached_size != 0) | |
1794 | memset (cached, 0, cached_size); | |
1795 | ||
1796 | /* Convert from external symbol information to internal. */ | |
1797 | if (! (NAME(aout,translate_symbol_table) | |
1798 | (abfd, cached, | |
1799 | obj_aout_external_syms (abfd), | |
1800 | obj_aout_external_sym_count (abfd), | |
1801 | obj_aout_external_strings (abfd), | |
1802 | obj_aout_external_string_size (abfd), | |
1803 | false))) | |
1804 | { | |
1805 | free (cached); | |
1806 | return false; | |
1807 | } | |
1808 | ||
1809 | bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd); | |
1810 | ||
1811 | obj_aout_symbols (abfd) = cached; | |
1812 | ||
1813 | /* It is very likely that anybody who calls this function will not | |
1814 | want the external symbol information, so if it was allocated | |
1815 | because of our call to aout_get_external_symbols, we free it up | |
1816 | right away to save space. */ | |
1817 | if (old_external_syms == (struct external_nlist *) NULL | |
1818 | && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL) | |
1819 | { | |
1820 | #ifdef USE_MMAP | |
1821 | bfd_free_window (&obj_aout_sym_window (abfd)); | |
1822 | #else | |
1823 | free (obj_aout_external_syms (abfd)); | |
1824 | #endif | |
1825 | obj_aout_external_syms (abfd) = NULL; | |
1826 | } | |
1827 | ||
1828 | return true; | |
1829 | } | |
1830 | \f | |
1831 | /* We use a hash table when writing out symbols so that we only write | |
1832 | out a particular string once. This helps particularly when the | |
1833 | linker writes out stabs debugging entries, because each different | |
1834 | contributing object file tends to have many duplicate stabs | |
1835 | strings. | |
1836 | ||
1837 | This hash table code breaks dbx on SunOS 4.1.3, so we don't do it | |
1838 | if BFD_TRADITIONAL_FORMAT is set. */ | |
1839 | ||
1840 | static bfd_size_type add_to_stringtab | |
1841 | PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean)); | |
1842 | static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *)); | |
1843 | ||
1844 | /* Get the index of a string in a strtab, adding it if it is not | |
1845 | already present. */ | |
1846 | ||
1847 | static INLINE bfd_size_type | |
1848 | add_to_stringtab (abfd, tab, str, copy) | |
1849 | bfd *abfd; | |
1850 | struct bfd_strtab_hash *tab; | |
1851 | const char *str; | |
1852 | boolean copy; | |
1853 | { | |
1854 | boolean hash; | |
1855 | bfd_size_type index; | |
1856 | ||
1857 | /* An index of 0 always means the empty string. */ | |
1858 | if (str == 0 || *str == '\0') | |
1859 | return 0; | |
1860 | ||
1861 | /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx | |
1862 | doesn't understand a hashed string table. */ | |
1863 | hash = true; | |
1864 | if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0) | |
1865 | hash = false; | |
1866 | ||
1867 | index = _bfd_stringtab_add (tab, str, hash, copy); | |
1868 | ||
1869 | if (index != (bfd_size_type) -1) | |
1870 | { | |
1871 | /* Add BYTES_IN_WORD to the return value to account for the | |
1872 | space taken up by the string table size. */ | |
1873 | index += BYTES_IN_WORD; | |
1874 | } | |
1875 | ||
1876 | return index; | |
1877 | } | |
1878 | ||
1879 | /* Write out a strtab. ABFD is already at the right location in the | |
1880 | file. */ | |
1881 | ||
1882 | static boolean | |
1883 | emit_stringtab (abfd, tab) | |
1884 | register bfd *abfd; | |
1885 | struct bfd_strtab_hash *tab; | |
1886 | { | |
1887 | bfd_byte buffer[BYTES_IN_WORD]; | |
1888 | ||
1889 | /* The string table starts with the size. */ | |
1890 | PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer); | |
1891 | if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD) | |
1892 | return false; | |
1893 | ||
1894 | return _bfd_stringtab_emit (abfd, tab); | |
1895 | } | |
1896 | \f | |
1897 | boolean | |
1898 | NAME(aout,write_syms) (abfd) | |
1899 | bfd *abfd; | |
1900 | { | |
1901 | unsigned int count ; | |
1902 | asymbol **generic = bfd_get_outsymbols (abfd); | |
1903 | struct bfd_strtab_hash *strtab; | |
1904 | ||
1905 | strtab = _bfd_stringtab_init (); | |
1906 | if (strtab == NULL) | |
1907 | return false; | |
1908 | ||
1909 | for (count = 0; count < bfd_get_symcount (abfd); count++) | |
1910 | { | |
1911 | asymbol *g = generic[count]; | |
1912 | bfd_size_type indx; | |
1913 | struct external_nlist nsp; | |
1914 | ||
1915 | indx = add_to_stringtab (abfd, strtab, g->name, false); | |
1916 | if (indx == (bfd_size_type) -1) | |
1917 | goto error_return; | |
1918 | PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx); | |
1919 | ||
1920 | if (bfd_asymbol_flavour(g) == abfd->xvec->flavour) | |
1921 | { | |
1922 | bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc); | |
1923 | bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other); | |
1924 | bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type); | |
1925 | } | |
1926 | else | |
1927 | { | |
1928 | bfd_h_put_16(abfd,0, nsp.e_desc); | |
1929 | bfd_h_put_8(abfd, 0, nsp.e_other); | |
1930 | bfd_h_put_8(abfd, 0, nsp.e_type); | |
1931 | } | |
1932 | ||
1933 | if (! translate_to_native_sym_flags (abfd, g, &nsp)) | |
1934 | goto error_return; | |
1935 | ||
1936 | if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd) | |
1937 | != EXTERNAL_NLIST_SIZE) | |
1938 | goto error_return; | |
1939 | ||
1940 | /* NB: `KEEPIT' currently overlays `udata.p', so set this only | |
1941 | here, at the end. */ | |
1942 | g->KEEPIT = count; | |
1943 | } | |
1944 | ||
1945 | if (! emit_stringtab (abfd, strtab)) | |
1946 | goto error_return; | |
1947 | ||
1948 | _bfd_stringtab_free (strtab); | |
1949 | ||
1950 | return true; | |
1951 | ||
1952 | error_return: | |
1953 | _bfd_stringtab_free (strtab); | |
1954 | return false; | |
1955 | } | |
1956 | ||
1957 | \f | |
1958 | long | |
1959 | NAME(aout,get_symtab) (abfd, location) | |
1960 | bfd *abfd; | |
1961 | asymbol **location; | |
1962 | { | |
1963 | unsigned int counter = 0; | |
1964 | aout_symbol_type *symbase; | |
1965 | ||
1966 | if (!NAME(aout,slurp_symbol_table)(abfd)) | |
1967 | return -1; | |
1968 | ||
1969 | for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);) | |
1970 | *(location++) = (asymbol *)( symbase++); | |
1971 | *location++ =0; | |
1972 | return bfd_get_symcount (abfd); | |
1973 | } | |
1974 | ||
1975 | \f | |
1976 | /* Standard reloc stuff */ | |
1977 | /* Output standard relocation information to a file in target byte order. */ | |
1978 | ||
1979 | extern void NAME(aout,swap_std_reloc_out) | |
1980 | PARAMS ((bfd *, arelent *, struct reloc_std_external *)); | |
1981 | ||
1982 | void | |
1983 | NAME(aout,swap_std_reloc_out) (abfd, g, natptr) | |
1984 | bfd *abfd; | |
1985 | arelent *g; | |
1986 | struct reloc_std_external *natptr; | |
1987 | { | |
1988 | int r_index; | |
1989 | asymbol *sym = *(g->sym_ptr_ptr); | |
1990 | int r_extern; | |
1991 | unsigned int r_length; | |
1992 | int r_pcrel; | |
1993 | int r_baserel, r_jmptable, r_relative; | |
1994 | asection *output_section = sym->section->output_section; | |
1995 | ||
1996 | PUT_WORD(abfd, g->address, natptr->r_address); | |
1997 | ||
1998 | r_length = g->howto->size ; /* Size as a power of two */ | |
1999 | r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ | |
2000 | /* XXX This relies on relocs coming from a.out files. */ | |
2001 | r_baserel = (g->howto->type & 8) != 0; | |
2002 | r_jmptable = (g->howto->type & 16) != 0; | |
2003 | r_relative = (g->howto->type & 32) != 0; | |
2004 | ||
2005 | #if 0 | |
2006 | /* For a standard reloc, the addend is in the object file. */ | |
2007 | r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma; | |
2008 | #endif | |
2009 | ||
2010 | /* name was clobbered by aout_write_syms to be symbol index */ | |
2011 | ||
2012 | /* If this relocation is relative to a symbol then set the | |
2013 | r_index to the symbols index, and the r_extern bit. | |
2014 | ||
2015 | Absolute symbols can come in in two ways, either as an offset | |
2016 | from the abs section, or as a symbol which has an abs value. | |
2017 | check for that here | |
2018 | */ | |
2019 | ||
2020 | ||
2021 | if (bfd_is_com_section (output_section) | |
2022 | || bfd_is_abs_section (output_section) | |
2023 | || bfd_is_und_section (output_section)) | |
2024 | { | |
2025 | if (bfd_abs_section_ptr->symbol == sym) | |
2026 | { | |
2027 | /* Whoops, looked like an abs symbol, but is really an offset | |
2028 | from the abs section */ | |
2029 | r_index = N_ABS; | |
2030 | r_extern = 0; | |
2031 | } | |
2032 | else | |
2033 | { | |
2034 | /* Fill in symbol */ | |
2035 | r_extern = 1; | |
2036 | r_index = (*(g->sym_ptr_ptr))->KEEPIT; | |
2037 | ||
2038 | } | |
2039 | } | |
2040 | else | |
2041 | { | |
2042 | /* Just an ordinary section */ | |
2043 | r_extern = 0; | |
2044 | r_index = output_section->target_index; | |
2045 | } | |
2046 | ||
2047 | /* now the fun stuff */ | |
2048 | if (bfd_header_big_endian (abfd)) { | |
2049 | natptr->r_index[0] = r_index >> 16; | |
2050 | natptr->r_index[1] = r_index >> 8; | |
2051 | natptr->r_index[2] = r_index; | |
2052 | natptr->r_type[0] = | |
2053 | (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0) | |
2054 | | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0) | |
2055 | | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0) | |
2056 | | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0) | |
2057 | | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0) | |
2058 | | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG); | |
2059 | } else { | |
2060 | natptr->r_index[2] = r_index >> 16; | |
2061 | natptr->r_index[1] = r_index >> 8; | |
2062 | natptr->r_index[0] = r_index; | |
2063 | natptr->r_type[0] = | |
2064 | (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0) | |
2065 | | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0) | |
2066 | | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0) | |
2067 | | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0) | |
2068 | | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0) | |
2069 | | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE); | |
2070 | } | |
2071 | } | |
2072 | ||
2073 | ||
2074 | /* Extended stuff */ | |
2075 | /* Output extended relocation information to a file in target byte order. */ | |
2076 | ||
2077 | extern void NAME(aout,swap_ext_reloc_out) | |
2078 | PARAMS ((bfd *, arelent *, struct reloc_ext_external *)); | |
2079 | ||
2080 | void | |
2081 | NAME(aout,swap_ext_reloc_out) (abfd, g, natptr) | |
2082 | bfd *abfd; | |
2083 | arelent *g; | |
2084 | register struct reloc_ext_external *natptr; | |
2085 | { | |
2086 | int r_index; | |
2087 | int r_extern; | |
2088 | unsigned int r_type; | |
2089 | unsigned int r_addend; | |
2090 | asymbol *sym = *(g->sym_ptr_ptr); | |
2091 | asection *output_section = sym->section->output_section; | |
2092 | ||
2093 | PUT_WORD (abfd, g->address, natptr->r_address); | |
2094 | ||
2095 | r_type = (unsigned int) g->howto->type; | |
2096 | ||
2097 | r_addend = g->addend; | |
2098 | if ((sym->flags & BSF_SECTION_SYM) != 0) | |
2099 | r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma; | |
2100 | ||
2101 | /* If this relocation is relative to a symbol then set the | |
2102 | r_index to the symbols index, and the r_extern bit. | |
2103 | ||
2104 | Absolute symbols can come in in two ways, either as an offset | |
2105 | from the abs section, or as a symbol which has an abs value. | |
2106 | check for that here. */ | |
2107 | ||
2108 | if (bfd_is_abs_section (bfd_get_section (sym))) | |
2109 | { | |
2110 | r_extern = 0; | |
2111 | r_index = N_ABS; | |
2112 | } | |
2113 | else if ((sym->flags & BSF_SECTION_SYM) == 0) | |
2114 | { | |
2115 | if (bfd_is_und_section (bfd_get_section (sym)) | |
2116 | || (sym->flags & BSF_GLOBAL) != 0) | |
2117 | r_extern = 1; | |
2118 | else | |
2119 | r_extern = 0; | |
2120 | r_index = (*(g->sym_ptr_ptr))->KEEPIT; | |
2121 | } | |
2122 | else | |
2123 | { | |
2124 | /* Just an ordinary section */ | |
2125 | r_extern = 0; | |
2126 | r_index = output_section->target_index; | |
2127 | } | |
2128 | ||
2129 | /* now the fun stuff */ | |
2130 | if (bfd_header_big_endian (abfd)) { | |
2131 | natptr->r_index[0] = r_index >> 16; | |
2132 | natptr->r_index[1] = r_index >> 8; | |
2133 | natptr->r_index[2] = r_index; | |
2134 | natptr->r_type[0] = | |
2135 | ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0) | |
2136 | | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG)); | |
2137 | } else { | |
2138 | natptr->r_index[2] = r_index >> 16; | |
2139 | natptr->r_index[1] = r_index >> 8; | |
2140 | natptr->r_index[0] = r_index; | |
2141 | natptr->r_type[0] = | |
2142 | (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0) | |
2143 | | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE); | |
2144 | } | |
2145 | ||
2146 | PUT_WORD (abfd, r_addend, natptr->r_addend); | |
2147 | } | |
2148 | ||
2149 | /* BFD deals internally with all things based from the section they're | |
2150 | in. so, something in 10 bytes into a text section with a base of | |
2151 | 50 would have a symbol (.text+10) and know .text vma was 50. | |
2152 | ||
2153 | Aout keeps all it's symbols based from zero, so the symbol would | |
2154 | contain 60. This macro subs the base of each section from the value | |
2155 | to give the true offset from the section */ | |
2156 | ||
2157 | ||
2158 | #define MOVE_ADDRESS(ad) \ | |
2159 | if (r_extern) { \ | |
2160 | /* undefined symbol */ \ | |
2161 | cache_ptr->sym_ptr_ptr = symbols + r_index; \ | |
2162 | cache_ptr->addend = ad; \ | |
2163 | } else { \ | |
2164 | /* defined, section relative. replace symbol with pointer to \ | |
2165 | symbol which points to section */ \ | |
2166 | switch (r_index) { \ | |
2167 | case N_TEXT: \ | |
2168 | case N_TEXT | N_EXT: \ | |
2169 | cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \ | |
2170 | cache_ptr->addend = ad - su->textsec->vma; \ | |
2171 | break; \ | |
2172 | case N_DATA: \ | |
2173 | case N_DATA | N_EXT: \ | |
2174 | cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \ | |
2175 | cache_ptr->addend = ad - su->datasec->vma; \ | |
2176 | break; \ | |
2177 | case N_BSS: \ | |
2178 | case N_BSS | N_EXT: \ | |
2179 | cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \ | |
2180 | cache_ptr->addend = ad - su->bsssec->vma; \ | |
2181 | break; \ | |
2182 | default: \ | |
2183 | case N_ABS: \ | |
2184 | case N_ABS | N_EXT: \ | |
2185 | cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \ | |
2186 | cache_ptr->addend = ad; \ | |
2187 | break; \ | |
2188 | } \ | |
2189 | } \ | |
2190 | ||
2191 | void | |
2192 | NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount) | |
2193 | bfd *abfd; | |
2194 | struct reloc_ext_external *bytes; | |
2195 | arelent *cache_ptr; | |
2196 | asymbol **symbols; | |
2197 | bfd_size_type symcount; | |
2198 | { | |
2199 | unsigned int r_index; | |
2200 | int r_extern; | |
2201 | unsigned int r_type; | |
2202 | struct aoutdata *su = &(abfd->tdata.aout_data->a); | |
2203 | ||
2204 | cache_ptr->address = (GET_SWORD (abfd, bytes->r_address)); | |
2205 | ||
2206 | /* now the fun stuff */ | |
2207 | if (bfd_header_big_endian (abfd)) { | |
2208 | r_index = (bytes->r_index[0] << 16) | |
2209 | | (bytes->r_index[1] << 8) | |
2210 | | bytes->r_index[2]; | |
2211 | r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); | |
2212 | r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) | |
2213 | >> RELOC_EXT_BITS_TYPE_SH_BIG; | |
2214 | } else { | |
2215 | r_index = (bytes->r_index[2] << 16) | |
2216 | | (bytes->r_index[1] << 8) | |
2217 | | bytes->r_index[0]; | |
2218 | r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); | |
2219 | r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) | |
2220 | >> RELOC_EXT_BITS_TYPE_SH_LITTLE; | |
2221 | } | |
2222 | ||
2223 | cache_ptr->howto = howto_table_ext + r_type; | |
2224 | ||
2225 | /* Base relative relocs are always against the symbol table, | |
2226 | regardless of the setting of r_extern. r_extern just reflects | |
2227 | whether the symbol the reloc is against is local or global. */ | |
2228 | if (r_type == RELOC_BASE10 | |
2229 | || r_type == RELOC_BASE13 | |
2230 | || r_type == RELOC_BASE22) | |
2231 | r_extern = 1; | |
2232 | ||
2233 | if (r_extern && r_index > symcount) | |
2234 | { | |
2235 | /* We could arrange to return an error, but it might be useful | |
2236 | to see the file even if it is bad. */ | |
2237 | r_extern = 0; | |
2238 | r_index = N_ABS; | |
2239 | } | |
2240 | ||
2241 | MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend)); | |
2242 | } | |
2243 | ||
2244 | void | |
2245 | NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount) | |
2246 | bfd *abfd; | |
2247 | struct reloc_std_external *bytes; | |
2248 | arelent *cache_ptr; | |
2249 | asymbol **symbols; | |
2250 | bfd_size_type symcount; | |
2251 | { | |
2252 | unsigned int r_index; | |
2253 | int r_extern; | |
2254 | unsigned int r_length; | |
2255 | int r_pcrel; | |
2256 | int r_baserel, r_jmptable, r_relative; | |
2257 | struct aoutdata *su = &(abfd->tdata.aout_data->a); | |
2258 | unsigned int howto_idx; | |
2259 | ||
2260 | cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address); | |
2261 | ||
2262 | /* now the fun stuff */ | |
2263 | if (bfd_header_big_endian (abfd)) { | |
2264 | r_index = (bytes->r_index[0] << 16) | |
2265 | | (bytes->r_index[1] << 8) | |
2266 | | bytes->r_index[2]; | |
2267 | r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); | |
2268 | r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); | |
2269 | r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); | |
2270 | r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); | |
2271 | r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); | |
2272 | r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) | |
2273 | >> RELOC_STD_BITS_LENGTH_SH_BIG; | |
2274 | } else { | |
2275 | r_index = (bytes->r_index[2] << 16) | |
2276 | | (bytes->r_index[1] << 8) | |
2277 | | bytes->r_index[0]; | |
2278 | r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); | |
2279 | r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); | |
2280 | r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE)); | |
2281 | r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE)); | |
2282 | r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE)); | |
2283 | r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) | |
2284 | >> RELOC_STD_BITS_LENGTH_SH_LITTLE; | |
2285 | } | |
2286 | ||
2287 | howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel | |
2288 | + 16 * r_jmptable + 32 * r_relative; | |
2289 | BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std)); | |
2290 | cache_ptr->howto = howto_table_std + howto_idx; | |
2291 | BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1); | |
2292 | ||
2293 | /* Base relative relocs are always against the symbol table, | |
2294 | regardless of the setting of r_extern. r_extern just reflects | |
2295 | whether the symbol the reloc is against is local or global. */ | |
2296 | if (r_baserel) | |
2297 | r_extern = 1; | |
2298 | ||
2299 | if (r_extern && r_index > symcount) | |
2300 | { | |
2301 | /* We could arrange to return an error, but it might be useful | |
2302 | to see the file even if it is bad. */ | |
2303 | r_extern = 0; | |
2304 | r_index = N_ABS; | |
2305 | } | |
2306 | ||
2307 | MOVE_ADDRESS(0); | |
2308 | } | |
2309 | ||
2310 | /* Read and swap the relocs for a section. */ | |
2311 | ||
2312 | boolean | |
2313 | NAME(aout,slurp_reloc_table) (abfd, asect, symbols) | |
2314 | bfd *abfd; | |
2315 | sec_ptr asect; | |
2316 | asymbol **symbols; | |
2317 | { | |
2318 | unsigned int count; | |
2319 | bfd_size_type reloc_size; | |
2320 | PTR relocs; | |
2321 | arelent *reloc_cache; | |
2322 | size_t each_size; | |
2323 | unsigned int counter = 0; | |
2324 | arelent *cache_ptr; | |
2325 | ||
2326 | if (asect->relocation) | |
2327 | return true; | |
2328 | ||
2329 | if (asect->flags & SEC_CONSTRUCTOR) | |
2330 | return true; | |
2331 | ||
2332 | if (asect == obj_datasec (abfd)) | |
2333 | reloc_size = exec_hdr(abfd)->a_drsize; | |
2334 | else if (asect == obj_textsec (abfd)) | |
2335 | reloc_size = exec_hdr(abfd)->a_trsize; | |
2336 | else if (asect == obj_bsssec (abfd)) | |
2337 | reloc_size = 0; | |
2338 | else | |
2339 | { | |
2340 | bfd_set_error (bfd_error_invalid_operation); | |
2341 | return false; | |
2342 | } | |
2343 | ||
2344 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) | |
2345 | return false; | |
2346 | ||
2347 | each_size = obj_reloc_entry_size (abfd); | |
2348 | ||
2349 | count = reloc_size / each_size; | |
2350 | ||
2351 | reloc_cache = (arelent *) bfd_malloc ((size_t) (count * sizeof (arelent))); | |
2352 | if (reloc_cache == NULL && count != 0) | |
2353 | return false; | |
2354 | memset (reloc_cache, 0, count * sizeof (arelent)); | |
2355 | ||
2356 | relocs = bfd_malloc ((size_t) reloc_size); | |
2357 | if (relocs == NULL && reloc_size != 0) | |
2358 | { | |
2359 | free (reloc_cache); | |
2360 | return false; | |
2361 | } | |
2362 | ||
2363 | if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size) | |
2364 | { | |
2365 | free (relocs); | |
2366 | free (reloc_cache); | |
2367 | return false; | |
2368 | } | |
2369 | ||
2370 | cache_ptr = reloc_cache; | |
2371 | if (each_size == RELOC_EXT_SIZE) | |
2372 | { | |
2373 | register struct reloc_ext_external *rptr = | |
2374 | (struct reloc_ext_external *) relocs; | |
2375 | ||
2376 | for (; counter < count; counter++, rptr++, cache_ptr++) | |
2377 | NAME(aout,swap_ext_reloc_in) (abfd, rptr, cache_ptr, symbols, | |
2378 | bfd_get_symcount (abfd)); | |
2379 | } | |
2380 | else | |
2381 | { | |
2382 | register struct reloc_std_external *rptr = | |
2383 | (struct reloc_std_external *) relocs; | |
2384 | ||
2385 | for (; counter < count; counter++, rptr++, cache_ptr++) | |
2386 | MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols, | |
2387 | bfd_get_symcount (abfd)); | |
2388 | } | |
2389 | ||
2390 | free (relocs); | |
2391 | ||
2392 | asect->relocation = reloc_cache; | |
2393 | asect->reloc_count = cache_ptr - reloc_cache; | |
2394 | ||
2395 | return true; | |
2396 | } | |
2397 | ||
2398 | /* Write out a relocation section into an object file. */ | |
2399 | ||
2400 | boolean | |
2401 | NAME(aout,squirt_out_relocs) (abfd, section) | |
2402 | bfd *abfd; | |
2403 | asection *section; | |
2404 | { | |
2405 | arelent **generic; | |
2406 | unsigned char *native, *natptr; | |
2407 | size_t each_size; | |
2408 | ||
2409 | unsigned int count = section->reloc_count; | |
2410 | size_t natsize; | |
2411 | ||
2412 | if (count == 0 || section->orelocation == NULL) | |
2413 | return true; | |
2414 | ||
2415 | each_size = obj_reloc_entry_size (abfd); | |
2416 | natsize = each_size * count; | |
2417 | native = (unsigned char *) bfd_zalloc (abfd, natsize); | |
2418 | if (!native) | |
2419 | return false; | |
2420 | ||
2421 | generic = section->orelocation; | |
2422 | ||
2423 | if (each_size == RELOC_EXT_SIZE) | |
2424 | { | |
2425 | for (natptr = native; | |
2426 | count != 0; | |
2427 | --count, natptr += each_size, ++generic) | |
2428 | NAME(aout,swap_ext_reloc_out) (abfd, *generic, (struct reloc_ext_external *)natptr); | |
2429 | } | |
2430 | else | |
2431 | { | |
2432 | for (natptr = native; | |
2433 | count != 0; | |
2434 | --count, natptr += each_size, ++generic) | |
2435 | MY_swap_std_reloc_out(abfd, *generic, (struct reloc_std_external *)natptr); | |
2436 | } | |
2437 | ||
2438 | if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) { | |
2439 | bfd_release(abfd, native); | |
2440 | return false; | |
2441 | } | |
2442 | bfd_release (abfd, native); | |
2443 | ||
2444 | return true; | |
2445 | } | |
2446 | ||
2447 | /* This is stupid. This function should be a boolean predicate */ | |
2448 | long | |
2449 | NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols) | |
2450 | bfd *abfd; | |
2451 | sec_ptr section; | |
2452 | arelent **relptr; | |
2453 | asymbol **symbols; | |
2454 | { | |
2455 | arelent *tblptr = section->relocation; | |
2456 | unsigned int count; | |
2457 | ||
2458 | if (section == obj_bsssec (abfd)) | |
2459 | { | |
2460 | *relptr = NULL; | |
2461 | return 0; | |
2462 | } | |
2463 | ||
2464 | if (!(tblptr || NAME(aout,slurp_reloc_table)(abfd, section, symbols))) | |
2465 | return -1; | |
2466 | ||
2467 | if (section->flags & SEC_CONSTRUCTOR) { | |
2468 | arelent_chain *chain = section->constructor_chain; | |
2469 | for (count = 0; count < section->reloc_count; count ++) { | |
2470 | *relptr ++ = &chain->relent; | |
2471 | chain = chain->next; | |
2472 | } | |
2473 | } | |
2474 | else { | |
2475 | tblptr = section->relocation; | |
2476 | ||
2477 | for (count = 0; count++ < section->reloc_count;) | |
2478 | { | |
2479 | *relptr++ = tblptr++; | |
2480 | } | |
2481 | } | |
2482 | *relptr = 0; | |
2483 | ||
2484 | return section->reloc_count; | |
2485 | } | |
2486 | ||
2487 | long | |
2488 | NAME(aout,get_reloc_upper_bound) (abfd, asect) | |
2489 | bfd *abfd; | |
2490 | sec_ptr asect; | |
2491 | { | |
2492 | if (bfd_get_format (abfd) != bfd_object) { | |
2493 | bfd_set_error (bfd_error_invalid_operation); | |
2494 | return -1; | |
2495 | } | |
2496 | if (asect->flags & SEC_CONSTRUCTOR) { | |
2497 | return (sizeof (arelent *) * (asect->reloc_count+1)); | |
2498 | } | |
2499 | ||
2500 | if (asect == obj_datasec (abfd)) | |
2501 | return (sizeof (arelent *) | |
2502 | * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd)) | |
2503 | + 1)); | |
2504 | ||
2505 | if (asect == obj_textsec (abfd)) | |
2506 | return (sizeof (arelent *) | |
2507 | * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd)) | |
2508 | + 1)); | |
2509 | ||
2510 | if (asect == obj_bsssec (abfd)) | |
2511 | return sizeof (arelent *); | |
2512 | ||
2513 | if (asect == obj_bsssec (abfd)) | |
2514 | return 0; | |
2515 | ||
2516 | bfd_set_error (bfd_error_invalid_operation); | |
2517 | return -1; | |
2518 | } | |
2519 | ||
2520 | \f | |
2521 | long | |
2522 | NAME(aout,get_symtab_upper_bound) (abfd) | |
2523 | bfd *abfd; | |
2524 | { | |
2525 | if (!NAME(aout,slurp_symbol_table)(abfd)) | |
2526 | return -1; | |
2527 | ||
2528 | return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *)); | |
2529 | } | |
2530 | ||
2531 | /*ARGSUSED*/ | |
2532 | alent * | |
2533 | NAME(aout,get_lineno) (ignore_abfd, ignore_symbol) | |
2534 | bfd *ignore_abfd; | |
2535 | asymbol *ignore_symbol; | |
2536 | { | |
2537 | return (alent *)NULL; | |
2538 | } | |
2539 | ||
2540 | /*ARGSUSED*/ | |
2541 | void | |
2542 | NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret) | |
2543 | bfd *ignore_abfd; | |
2544 | asymbol *symbol; | |
2545 | symbol_info *ret; | |
2546 | { | |
2547 | bfd_symbol_info (symbol, ret); | |
2548 | ||
2549 | if (ret->type == '?') | |
2550 | { | |
2551 | int type_code = aout_symbol(symbol)->type & 0xff; | |
2552 | const char *stab_name = bfd_get_stab_name (type_code); | |
2553 | static char buf[10]; | |
2554 | ||
2555 | if (stab_name == NULL) | |
2556 | { | |
2557 | sprintf(buf, "(%d)", type_code); | |
2558 | stab_name = buf; | |
2559 | } | |
2560 | ret->type = '-'; | |
2561 | ret->stab_type = type_code; | |
2562 | ret->stab_other = (unsigned)(aout_symbol(symbol)->other & 0xff); | |
2563 | ret->stab_desc = (unsigned)(aout_symbol(symbol)->desc & 0xffff); | |
2564 | ret->stab_name = stab_name; | |
2565 | } | |
2566 | } | |
2567 | ||
2568 | /*ARGSUSED*/ | |
2569 | void | |
2570 | NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how) | |
2571 | bfd *ignore_abfd; | |
2572 | PTR afile; | |
2573 | asymbol *symbol; | |
2574 | bfd_print_symbol_type how; | |
2575 | { | |
2576 | FILE *file = (FILE *)afile; | |
2577 | ||
2578 | switch (how) { | |
2579 | case bfd_print_symbol_name: | |
2580 | if (symbol->name) | |
2581 | fprintf(file,"%s", symbol->name); | |
2582 | break; | |
2583 | case bfd_print_symbol_more: | |
2584 | fprintf(file,"%4x %2x %2x",(unsigned)(aout_symbol(symbol)->desc & 0xffff), | |
2585 | (unsigned)(aout_symbol(symbol)->other & 0xff), | |
2586 | (unsigned)(aout_symbol(symbol)->type)); | |
2587 | break; | |
2588 | case bfd_print_symbol_all: | |
2589 | { | |
2590 | CONST char *section_name = symbol->section->name; | |
2591 | ||
2592 | ||
2593 | bfd_print_symbol_vandf((PTR)file,symbol); | |
2594 | ||
2595 | fprintf(file," %-5s %04x %02x %02x", | |
2596 | section_name, | |
2597 | (unsigned)(aout_symbol(symbol)->desc & 0xffff), | |
2598 | (unsigned)(aout_symbol(symbol)->other & 0xff), | |
2599 | (unsigned)(aout_symbol(symbol)->type & 0xff)); | |
2600 | if (symbol->name) | |
2601 | fprintf(file," %s", symbol->name); | |
2602 | } | |
2603 | break; | |
2604 | } | |
2605 | } | |
2606 | ||
2607 | /* If we don't have to allocate more than 1MB to hold the generic | |
2608 | symbols, we use the generic minisymbol methord: it's faster, since | |
2609 | it only translates the symbols once, not multiple times. */ | |
2610 | #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol)) | |
2611 | ||
2612 | /* Read minisymbols. For minisymbols, we use the unmodified a.out | |
2613 | symbols. The minisymbol_to_symbol function translates these into | |
2614 | BFD asymbol structures. */ | |
2615 | ||
2616 | long | |
2617 | NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep) | |
2618 | bfd *abfd; | |
2619 | boolean dynamic; | |
2620 | PTR *minisymsp; | |
2621 | unsigned int *sizep; | |
2622 | { | |
2623 | if (dynamic) | |
2624 | { | |
2625 | /* We could handle the dynamic symbols here as well, but it's | |
2626 | easier to hand them off. */ | |
2627 | return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); | |
2628 | } | |
2629 | ||
2630 | if (! aout_get_external_symbols (abfd)) | |
2631 | return -1; | |
2632 | ||
2633 | if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) | |
2634 | return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); | |
2635 | ||
2636 | *minisymsp = (PTR) obj_aout_external_syms (abfd); | |
2637 | ||
2638 | /* By passing the external symbols back from this routine, we are | |
2639 | giving up control over the memory block. Clear | |
2640 | obj_aout_external_syms, so that we do not try to free it | |
2641 | ourselves. */ | |
2642 | obj_aout_external_syms (abfd) = NULL; | |
2643 | ||
2644 | *sizep = EXTERNAL_NLIST_SIZE; | |
2645 | return obj_aout_external_sym_count (abfd); | |
2646 | } | |
2647 | ||
2648 | /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an | |
2649 | unmodified a.out symbol. The SYM argument is a structure returned | |
2650 | by bfd_make_empty_symbol, which we fill in here. */ | |
2651 | ||
2652 | asymbol * | |
2653 | NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym) | |
2654 | bfd *abfd; | |
2655 | boolean dynamic; | |
2656 | const PTR minisym; | |
2657 | asymbol *sym; | |
2658 | { | |
2659 | if (dynamic | |
2660 | || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) | |
2661 | return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym); | |
2662 | ||
2663 | memset (sym, 0, sizeof (aout_symbol_type)); | |
2664 | ||
2665 | /* We call translate_symbol_table to translate a single symbol. */ | |
2666 | if (! (NAME(aout,translate_symbol_table) | |
2667 | (abfd, | |
2668 | (aout_symbol_type *) sym, | |
2669 | (struct external_nlist *) minisym, | |
2670 | (bfd_size_type) 1, | |
2671 | obj_aout_external_strings (abfd), | |
2672 | obj_aout_external_string_size (abfd), | |
2673 | false))) | |
2674 | return NULL; | |
2675 | ||
2676 | return sym; | |
2677 | } | |
2678 | ||
2679 | /* | |
2680 | provided a BFD, a section and an offset into the section, calculate | |
2681 | and return the name of the source file and the line nearest to the | |
2682 | wanted location. | |
2683 | */ | |
2684 | ||
2685 | boolean | |
2686 | NAME(aout,find_nearest_line) | |
2687 | (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr) | |
2688 | bfd *abfd; | |
2689 | asection *section; | |
2690 | asymbol **symbols; | |
2691 | bfd_vma offset; | |
2692 | CONST char **filename_ptr; | |
2693 | CONST char **functionname_ptr; | |
2694 | unsigned int *line_ptr; | |
2695 | { | |
2696 | /* Run down the file looking for the filename, function and linenumber */ | |
2697 | asymbol **p; | |
2698 | CONST char *directory_name = NULL; | |
2699 | CONST char *main_file_name = NULL; | |
2700 | CONST char *current_file_name = NULL; | |
2701 | CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */ | |
2702 | CONST char *line_directory_name = NULL; /* Value of directory_name at line number. */ | |
2703 | bfd_vma low_line_vma = 0; | |
2704 | bfd_vma low_func_vma = 0; | |
2705 | asymbol *func = 0; | |
2706 | size_t filelen, funclen; | |
2707 | char *buf; | |
2708 | ||
2709 | *filename_ptr = abfd->filename; | |
2710 | *functionname_ptr = 0; | |
2711 | *line_ptr = 0; | |
2712 | if (symbols != (asymbol **)NULL) { | |
2713 | for (p = symbols; *p; p++) { | |
2714 | aout_symbol_type *q = (aout_symbol_type *)(*p); | |
2715 | next: | |
2716 | switch (q->type){ | |
2717 | case N_TEXT: | |
2718 | /* If this looks like a file name symbol, and it comes after | |
2719 | the line number we have found so far, but before the | |
2720 | offset, then we have probably not found the right line | |
2721 | number. */ | |
2722 | if (q->symbol.value <= offset | |
2723 | && ((q->symbol.value > low_line_vma | |
2724 | && (line_file_name != NULL | |
2725 | || *line_ptr != 0)) | |
2726 | || (q->symbol.value > low_func_vma | |
2727 | && func != NULL))) | |
2728 | { | |
2729 | const char *symname; | |
2730 | ||
2731 | symname = q->symbol.name; | |
2732 | if (strcmp (symname + strlen (symname) - 2, ".o") == 0) | |
2733 | { | |
2734 | if (q->symbol.value > low_line_vma) | |
2735 | { | |
2736 | *line_ptr = 0; | |
2737 | line_file_name = NULL; | |
2738 | } | |
2739 | if (q->symbol.value > low_func_vma) | |
2740 | func = NULL; | |
2741 | } | |
2742 | } | |
2743 | break; | |
2744 | ||
2745 | case N_SO: | |
2746 | /* If this symbol is less than the offset, but greater than | |
2747 | the line number we have found so far, then we have not | |
2748 | found the right line number. */ | |
2749 | if (q->symbol.value <= offset) | |
2750 | { | |
2751 | if (q->symbol.value > low_line_vma) | |
2752 | { | |
2753 | *line_ptr = 0; | |
2754 | line_file_name = NULL; | |
2755 | } | |
2756 | if (q->symbol.value > low_func_vma) | |
2757 | func = NULL; | |
2758 | } | |
2759 | ||
2760 | main_file_name = current_file_name = q->symbol.name; | |
2761 | /* Look ahead to next symbol to check if that too is an N_SO. */ | |
2762 | p++; | |
2763 | if (*p == NULL) | |
2764 | break; | |
2765 | q = (aout_symbol_type *)(*p); | |
2766 | if (q->type != (int)N_SO) | |
2767 | goto next; | |
2768 | ||
2769 | /* Found a second N_SO First is directory; second is filename. */ | |
2770 | directory_name = current_file_name; | |
2771 | main_file_name = current_file_name = q->symbol.name; | |
2772 | if (obj_textsec(abfd) != section) | |
2773 | goto done; | |
2774 | break; | |
2775 | case N_SOL: | |
2776 | current_file_name = q->symbol.name; | |
2777 | break; | |
2778 | ||
2779 | case N_SLINE: | |
2780 | ||
2781 | case N_DSLINE: | |
2782 | case N_BSLINE: | |
2783 | /* We'll keep this if it resolves nearer than the one we have | |
2784 | already. */ | |
2785 | if (q->symbol.value >= low_line_vma | |
2786 | && q->symbol.value <= offset) | |
2787 | { | |
2788 | *line_ptr = q->desc; | |
2789 | low_line_vma = q->symbol.value; | |
2790 | line_file_name = current_file_name; | |
2791 | line_directory_name = directory_name; | |
2792 | } | |
2793 | break; | |
2794 | case N_FUN: | |
2795 | { | |
2796 | /* We'll keep this if it is nearer than the one we have already */ | |
2797 | if (q->symbol.value >= low_func_vma && | |
2798 | q->symbol.value <= offset) { | |
2799 | low_func_vma = q->symbol.value; | |
2800 | func = (asymbol *)q; | |
2801 | } | |
2802 | else if (q->symbol.value > offset) | |
2803 | goto done; | |
2804 | } | |
2805 | break; | |
2806 | } | |
2807 | } | |
2808 | } | |
2809 | ||
2810 | done: | |
2811 | if (*line_ptr != 0) | |
2812 | { | |
2813 | main_file_name = line_file_name; | |
2814 | directory_name = line_directory_name; | |
2815 | } | |
2816 | ||
2817 | if (main_file_name == NULL | |
2818 | || main_file_name[0] == '/' | |
2819 | || directory_name == NULL) | |
2820 | filelen = 0; | |
2821 | else | |
2822 | filelen = strlen (directory_name) + strlen (main_file_name); | |
2823 | if (func == NULL) | |
2824 | funclen = 0; | |
2825 | else | |
2826 | funclen = strlen (bfd_asymbol_name (func)); | |
2827 | ||
2828 | if (adata (abfd).line_buf != NULL) | |
2829 | free (adata (abfd).line_buf); | |
2830 | if (filelen + funclen == 0) | |
2831 | adata (abfd).line_buf = buf = NULL; | |
2832 | else | |
2833 | { | |
2834 | buf = (char *) bfd_malloc (filelen + funclen + 3); | |
2835 | adata (abfd).line_buf = buf; | |
2836 | if (buf == NULL) | |
2837 | return false; | |
2838 | } | |
2839 | ||
2840 | if (main_file_name != NULL) | |
2841 | { | |
2842 | if (main_file_name[0] == '/' || directory_name == NULL) | |
2843 | *filename_ptr = main_file_name; | |
2844 | else | |
2845 | { | |
2846 | sprintf (buf, "%s%s", directory_name, main_file_name); | |
2847 | *filename_ptr = buf; | |
2848 | buf += filelen + 1; | |
2849 | } | |
2850 | } | |
2851 | ||
2852 | if (func) | |
2853 | { | |
2854 | const char *function = func->name; | |
2855 | char *p; | |
2856 | ||
2857 | /* The caller expects a symbol name. We actually have a | |
2858 | function name, without the leading underscore. Put the | |
2859 | underscore back in, so that the caller gets a symbol name. */ | |
2860 | if (bfd_get_symbol_leading_char (abfd) == '\0') | |
2861 | strcpy (buf, function); | |
2862 | else | |
2863 | { | |
2864 | buf[0] = bfd_get_symbol_leading_char (abfd); | |
2865 | strcpy (buf + 1, function); | |
2866 | } | |
2867 | /* Have to remove : stuff */ | |
2868 | p = strchr (buf, ':'); | |
2869 | if (p != NULL) | |
2870 | *p = '\0'; | |
2871 | *functionname_ptr = buf; | |
2872 | } | |
2873 | ||
2874 | return true; | |
2875 | } | |
2876 | ||
2877 | /*ARGSUSED*/ | |
2878 | int | |
2879 | NAME(aout,sizeof_headers) (abfd, execable) | |
2880 | bfd *abfd; | |
2881 | boolean execable; | |
2882 | { | |
2883 | return adata(abfd).exec_bytes_size; | |
2884 | } | |
2885 | ||
2886 | /* Free all information we have cached for this BFD. We can always | |
2887 | read it again later if we need it. */ | |
2888 | ||
2889 | boolean | |
2890 | NAME(aout,bfd_free_cached_info) (abfd) | |
2891 | bfd *abfd; | |
2892 | { | |
2893 | asection *o; | |
2894 | ||
2895 | if (bfd_get_format (abfd) != bfd_object) | |
2896 | return true; | |
2897 | ||
2898 | #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; } | |
2899 | BFCI_FREE (obj_aout_symbols (abfd)); | |
2900 | #ifdef USE_MMAP | |
2901 | obj_aout_external_syms (abfd) = 0; | |
2902 | bfd_free_window (&obj_aout_sym_window (abfd)); | |
2903 | bfd_free_window (&obj_aout_string_window (abfd)); | |
2904 | obj_aout_external_strings (abfd) = 0; | |
2905 | #else | |
2906 | BFCI_FREE (obj_aout_external_syms (abfd)); | |
2907 | BFCI_FREE (obj_aout_external_strings (abfd)); | |
2908 | #endif | |
2909 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
2910 | BFCI_FREE (o->relocation); | |
2911 | #undef BFCI_FREE | |
2912 | ||
2913 | return true; | |
2914 | } | |
2915 | \f | |
2916 | /* a.out link code. */ | |
2917 | ||
2918 | static boolean aout_link_add_object_symbols | |
2919 | PARAMS ((bfd *, struct bfd_link_info *)); | |
2920 | static boolean aout_link_check_archive_element | |
2921 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); | |
2922 | static boolean aout_link_free_symbols PARAMS ((bfd *)); | |
2923 | static boolean aout_link_check_ar_symbols | |
2924 | PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded)); | |
2925 | static boolean aout_link_add_symbols | |
2926 | PARAMS ((bfd *, struct bfd_link_info *)); | |
2927 | ||
2928 | /* Routine to create an entry in an a.out link hash table. */ | |
2929 | ||
2930 | struct bfd_hash_entry * | |
2931 | NAME(aout,link_hash_newfunc) (entry, table, string) | |
2932 | struct bfd_hash_entry *entry; | |
2933 | struct bfd_hash_table *table; | |
2934 | const char *string; | |
2935 | { | |
2936 | struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry; | |
2937 | ||
2938 | /* Allocate the structure if it has not already been allocated by a | |
2939 | subclass. */ | |
2940 | if (ret == (struct aout_link_hash_entry *) NULL) | |
2941 | ret = ((struct aout_link_hash_entry *) | |
2942 | bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry))); | |
2943 | if (ret == (struct aout_link_hash_entry *) NULL) | |
2944 | return (struct bfd_hash_entry *) ret; | |
2945 | ||
2946 | /* Call the allocation method of the superclass. */ | |
2947 | ret = ((struct aout_link_hash_entry *) | |
2948 | _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
2949 | table, string)); | |
2950 | if (ret) | |
2951 | { | |
2952 | /* Set local fields. */ | |
2953 | ret->written = false; | |
2954 | ret->indx = -1; | |
2955 | } | |
2956 | ||
2957 | return (struct bfd_hash_entry *) ret; | |
2958 | } | |
2959 | ||
2960 | /* Initialize an a.out link hash table. */ | |
2961 | ||
2962 | boolean | |
2963 | NAME(aout,link_hash_table_init) (table, abfd, newfunc) | |
2964 | struct aout_link_hash_table *table; | |
2965 | bfd *abfd; | |
2966 | struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, | |
2967 | struct bfd_hash_table *, | |
2968 | const char *)); | |
2969 | { | |
2970 | return _bfd_link_hash_table_init (&table->root, abfd, newfunc); | |
2971 | } | |
2972 | ||
2973 | /* Create an a.out link hash table. */ | |
2974 | ||
2975 | struct bfd_link_hash_table * | |
2976 | NAME(aout,link_hash_table_create) (abfd) | |
2977 | bfd *abfd; | |
2978 | { | |
2979 | struct aout_link_hash_table *ret; | |
2980 | ||
2981 | ret = ((struct aout_link_hash_table *) | |
2982 | bfd_alloc (abfd, sizeof (struct aout_link_hash_table))); | |
2983 | if (ret == NULL) | |
2984 | return (struct bfd_link_hash_table *) NULL; | |
2985 | if (! NAME(aout,link_hash_table_init) (ret, abfd, | |
2986 | NAME(aout,link_hash_newfunc))) | |
2987 | { | |
2988 | free (ret); | |
2989 | return (struct bfd_link_hash_table *) NULL; | |
2990 | } | |
2991 | return &ret->root; | |
2992 | } | |
2993 | ||
2994 | /* Given an a.out BFD, add symbols to the global hash table as | |
2995 | appropriate. */ | |
2996 | ||
2997 | boolean | |
2998 | NAME(aout,link_add_symbols) (abfd, info) | |
2999 | bfd *abfd; | |
3000 | struct bfd_link_info *info; | |
3001 | { | |
3002 | switch (bfd_get_format (abfd)) | |
3003 | { | |
3004 | case bfd_object: | |
3005 | return aout_link_add_object_symbols (abfd, info); | |
3006 | case bfd_archive: | |
3007 | return _bfd_generic_link_add_archive_symbols | |
3008 | (abfd, info, aout_link_check_archive_element); | |
3009 | default: | |
3010 | bfd_set_error (bfd_error_wrong_format); | |
3011 | return false; | |
3012 | } | |
3013 | } | |
3014 | ||
3015 | /* Add symbols from an a.out object file. */ | |
3016 | ||
3017 | static boolean | |
3018 | aout_link_add_object_symbols (abfd, info) | |
3019 | bfd *abfd; | |
3020 | struct bfd_link_info *info; | |
3021 | { | |
3022 | if (! aout_get_external_symbols (abfd)) | |
3023 | return false; | |
3024 | if (! aout_link_add_symbols (abfd, info)) | |
3025 | return false; | |
3026 | if (! info->keep_memory) | |
3027 | { | |
3028 | if (! aout_link_free_symbols (abfd)) | |
3029 | return false; | |
3030 | } | |
3031 | return true; | |
3032 | } | |
3033 | ||
3034 | /* Check a single archive element to see if we need to include it in | |
3035 | the link. *PNEEDED is set according to whether this element is | |
3036 | needed in the link or not. This is called from | |
3037 | _bfd_generic_link_add_archive_symbols. */ | |
3038 | ||
3039 | static boolean | |
3040 | aout_link_check_archive_element (abfd, info, pneeded) | |
3041 | bfd *abfd; | |
3042 | struct bfd_link_info *info; | |
3043 | boolean *pneeded; | |
3044 | { | |
3045 | if (! aout_get_external_symbols (abfd)) | |
3046 | return false; | |
3047 | ||
3048 | if (! aout_link_check_ar_symbols (abfd, info, pneeded)) | |
3049 | return false; | |
3050 | ||
3051 | if (*pneeded) | |
3052 | { | |
3053 | if (! aout_link_add_symbols (abfd, info)) | |
3054 | return false; | |
3055 | } | |
3056 | ||
3057 | if (! info->keep_memory || ! *pneeded) | |
3058 | { | |
3059 | if (! aout_link_free_symbols (abfd)) | |
3060 | return false; | |
3061 | } | |
3062 | ||
3063 | return true; | |
3064 | } | |
3065 | ||
3066 | /* Free up the internal symbols read from an a.out file. */ | |
3067 | ||
3068 | static boolean | |
3069 | aout_link_free_symbols (abfd) | |
3070 | bfd *abfd; | |
3071 | { | |
3072 | if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL) | |
3073 | { | |
3074 | #ifdef USE_MMAP | |
3075 | bfd_free_window (&obj_aout_sym_window (abfd)); | |
3076 | #else | |
3077 | free ((PTR) obj_aout_external_syms (abfd)); | |
3078 | #endif | |
3079 | obj_aout_external_syms (abfd) = (struct external_nlist *) NULL; | |
3080 | } | |
3081 | if (obj_aout_external_strings (abfd) != (char *) NULL) | |
3082 | { | |
3083 | #ifdef USE_MMAP | |
3084 | bfd_free_window (&obj_aout_string_window (abfd)); | |
3085 | #else | |
3086 | free ((PTR) obj_aout_external_strings (abfd)); | |
3087 | #endif | |
3088 | obj_aout_external_strings (abfd) = (char *) NULL; | |
3089 | } | |
3090 | return true; | |
3091 | } | |
3092 | ||
3093 | /* Look through the internal symbols to see if this object file should | |
3094 | be included in the link. We should include this object file if it | |
3095 | defines any symbols which are currently undefined. If this object | |
3096 | file defines a common symbol, then we may adjust the size of the | |
3097 | known symbol but we do not include the object file in the link | |
3098 | (unless there is some other reason to include it). */ | |
3099 | ||
3100 | static boolean | |
3101 | aout_link_check_ar_symbols (abfd, info, pneeded) | |
3102 | bfd *abfd; | |
3103 | struct bfd_link_info *info; | |
3104 | boolean *pneeded; | |
3105 | { | |
3106 | register struct external_nlist *p; | |
3107 | struct external_nlist *pend; | |
3108 | char *strings; | |
3109 | ||
3110 | *pneeded = false; | |
3111 | ||
3112 | /* Look through all the symbols. */ | |
3113 | p = obj_aout_external_syms (abfd); | |
3114 | pend = p + obj_aout_external_sym_count (abfd); | |
3115 | strings = obj_aout_external_strings (abfd); | |
3116 | for (; p < pend; p++) | |
3117 | { | |
3118 | int type = bfd_h_get_8 (abfd, p->e_type); | |
3119 | const char *name; | |
3120 | struct bfd_link_hash_entry *h; | |
3121 | ||
3122 | /* Ignore symbols that are not externally visible. This is an | |
3123 | optimization only, as we check the type more thoroughly | |
3124 | below. */ | |
3125 | if (((type & N_EXT) == 0 | |
3126 | || (type & N_STAB) != 0 | |
3127 | || type == N_FN) | |
3128 | && type != N_WEAKA | |
3129 | && type != N_WEAKT | |
3130 | && type != N_WEAKD | |
3131 | && type != N_WEAKB) | |
3132 | { | |
3133 | if (type == N_WARNING | |
3134 | || type == N_INDR) | |
3135 | ++p; | |
3136 | continue; | |
3137 | } | |
3138 | ||
3139 | name = strings + GET_WORD (abfd, p->e_strx); | |
3140 | h = bfd_link_hash_lookup (info->hash, name, false, false, true); | |
3141 | ||
3142 | /* We are only interested in symbols that are currently | |
3143 | undefined or common. */ | |
3144 | if (h == (struct bfd_link_hash_entry *) NULL | |
3145 | || (h->type != bfd_link_hash_undefined | |
3146 | && h->type != bfd_link_hash_common)) | |
3147 | { | |
3148 | if (type == (N_INDR | N_EXT)) | |
3149 | ++p; | |
3150 | continue; | |
3151 | } | |
3152 | ||
3153 | if (type == (N_TEXT | N_EXT) | |
3154 | || type == (N_DATA | N_EXT) | |
3155 | || type == (N_BSS | N_EXT) | |
3156 | || type == (N_ABS | N_EXT) | |
3157 | || type == (N_INDR | N_EXT)) | |
3158 | { | |
3159 | /* This object file defines this symbol. We must link it | |
3160 | in. This is true regardless of whether the current | |
3161 | definition of the symbol is undefined or common. If the | |
3162 | current definition is common, we have a case in which we | |
3163 | have already seen an object file including | |
3164 | int a; | |
3165 | and this object file from the archive includes | |
3166 | int a = 5; | |
3167 | In such a case we must include this object file. | |
3168 | ||
3169 | FIXME: The SunOS 4.1.3 linker will pull in the archive | |
3170 | element if the symbol is defined in the .data section, | |
3171 | but not if it is defined in the .text section. That | |
3172 | seems a bit crazy to me, and I haven't implemented it. | |
3173 | However, it might be correct. */ | |
3174 | if (! (*info->callbacks->add_archive_element) (info, abfd, name)) | |
3175 | return false; | |
3176 | *pneeded = true; | |
3177 | return true; | |
3178 | } | |
3179 | ||
3180 | if (type == (N_UNDF | N_EXT)) | |
3181 | { | |
3182 | bfd_vma value; | |
3183 | ||
3184 | value = GET_WORD (abfd, p->e_value); | |
3185 | if (value != 0) | |
3186 | { | |
3187 | /* This symbol is common in the object from the archive | |
3188 | file. */ | |
3189 | if (h->type == bfd_link_hash_undefined) | |
3190 | { | |
3191 | bfd *symbfd; | |
3192 | unsigned int power; | |
3193 | ||
3194 | symbfd = h->u.undef.abfd; | |
3195 | if (symbfd == (bfd *) NULL) | |
3196 | { | |
3197 | /* This symbol was created as undefined from | |
3198 | outside BFD. We assume that we should link | |
3199 | in the object file. This is done for the -u | |
3200 | option in the linker. */ | |
3201 | if (! (*info->callbacks->add_archive_element) (info, | |
3202 | abfd, | |
3203 | name)) | |
3204 | return false; | |
3205 | *pneeded = true; | |
3206 | return true; | |
3207 | } | |
3208 | /* Turn the current link symbol into a common | |
3209 | symbol. It is already on the undefs list. */ | |
3210 | h->type = bfd_link_hash_common; | |
3211 | h->u.c.p = ((struct bfd_link_hash_common_entry *) | |
3212 | bfd_hash_allocate (&info->hash->table, | |
3213 | sizeof (struct bfd_link_hash_common_entry))); | |
3214 | if (h->u.c.p == NULL) | |
3215 | return false; | |
3216 | ||
3217 | h->u.c.size = value; | |
3218 | ||
3219 | /* FIXME: This isn't quite right. The maximum | |
3220 | alignment of a common symbol should be set by the | |
3221 | architecture of the output file, not of the input | |
3222 | file. */ | |
3223 | power = bfd_log2 (value); | |
3224 | if (power > bfd_get_arch_info (abfd)->section_align_power) | |
3225 | power = bfd_get_arch_info (abfd)->section_align_power; | |
3226 | h->u.c.p->alignment_power = power; | |
3227 | ||
3228 | h->u.c.p->section = bfd_make_section_old_way (symbfd, | |
3229 | "COMMON"); | |
3230 | } | |
3231 | else | |
3232 | { | |
3233 | /* Adjust the size of the common symbol if | |
3234 | necessary. */ | |
3235 | if (value > h->u.c.size) | |
3236 | h->u.c.size = value; | |
3237 | } | |
3238 | } | |
3239 | } | |
3240 | ||
3241 | if (type == N_WEAKA | |
3242 | || type == N_WEAKT | |
3243 | || type == N_WEAKD | |
3244 | || type == N_WEAKB) | |
3245 | { | |
3246 | /* This symbol is weak but defined. We must pull it in if | |
3247 | the current link symbol is undefined, but we don't want | |
3248 | it if the current link symbol is common. */ | |
3249 | if (h->type == bfd_link_hash_undefined) | |
3250 | { | |
3251 | if (! (*info->callbacks->add_archive_element) (info, abfd, name)) | |
3252 | return false; | |
3253 | *pneeded = true; | |
3254 | return true; | |
3255 | } | |
3256 | } | |
3257 | } | |
3258 | ||
3259 | /* We do not need this object file. */ | |
3260 | return true; | |
3261 | } | |
3262 | ||
3263 | /* Add all symbols from an object file to the hash table. */ | |
3264 | ||
3265 | static boolean | |
3266 | aout_link_add_symbols (abfd, info) | |
3267 | bfd *abfd; | |
3268 | struct bfd_link_info *info; | |
3269 | { | |
3270 | boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *, | |
3271 | const char *, flagword, asection *, | |
3272 | bfd_vma, const char *, boolean, | |
3273 | boolean, | |
3274 | struct bfd_link_hash_entry **)); | |
3275 | struct external_nlist *syms; | |
3276 | bfd_size_type sym_count; | |
3277 | char *strings; | |
3278 | boolean copy; | |
3279 | struct aout_link_hash_entry **sym_hash; | |
3280 | register struct external_nlist *p; | |
3281 | struct external_nlist *pend; | |
3282 | ||
3283 | syms = obj_aout_external_syms (abfd); | |
3284 | sym_count = obj_aout_external_sym_count (abfd); | |
3285 | strings = obj_aout_external_strings (abfd); | |
3286 | if (info->keep_memory) | |
3287 | copy = false; | |
3288 | else | |
3289 | copy = true; | |
3290 | ||
3291 | if (aout_backend_info (abfd)->add_dynamic_symbols != NULL) | |
3292 | { | |
3293 | if (! ((*aout_backend_info (abfd)->add_dynamic_symbols) | |
3294 | (abfd, info, &syms, &sym_count, &strings))) | |
3295 | return false; | |
3296 | } | |
3297 | ||
3298 | /* We keep a list of the linker hash table entries that correspond | |
3299 | to particular symbols. We could just look them up in the hash | |
3300 | table, but keeping the list is more efficient. Perhaps this | |
3301 | should be conditional on info->keep_memory. */ | |
3302 | sym_hash = ((struct aout_link_hash_entry **) | |
3303 | bfd_alloc (abfd, | |
3304 | ((size_t) sym_count | |
3305 | * sizeof (struct aout_link_hash_entry *)))); | |
3306 | if (sym_hash == NULL && sym_count != 0) | |
3307 | return false; | |
3308 | obj_aout_sym_hashes (abfd) = sym_hash; | |
3309 | ||
3310 | add_one_symbol = aout_backend_info (abfd)->add_one_symbol; | |
3311 | if (add_one_symbol == NULL) | |
3312 | add_one_symbol = _bfd_generic_link_add_one_symbol; | |
3313 | ||
3314 | p = syms; | |
3315 | pend = p + sym_count; | |
3316 | for (; p < pend; p++, sym_hash++) | |
3317 | { | |
3318 | int type; | |
3319 | const char *name; | |
3320 | bfd_vma value; | |
3321 | asection *section; | |
3322 | flagword flags; | |
3323 | const char *string; | |
3324 | ||
3325 | *sym_hash = NULL; | |
3326 | ||
3327 | type = bfd_h_get_8 (abfd, p->e_type); | |
3328 | ||
3329 | /* Ignore debugging symbols. */ | |
3330 | if ((type & N_STAB) != 0) | |
3331 | continue; | |
3332 | ||
3333 | name = strings + GET_WORD (abfd, p->e_strx); | |
3334 | value = GET_WORD (abfd, p->e_value); | |
3335 | flags = BSF_GLOBAL; | |
3336 | string = NULL; | |
3337 | switch (type) | |
3338 | { | |
3339 | default: | |
3340 | abort (); | |
3341 | ||
3342 | case N_UNDF: | |
3343 | case N_ABS: | |
3344 | case N_TEXT: | |
3345 | case N_DATA: | |
3346 | case N_BSS: | |
3347 | case N_FN_SEQ: | |
3348 | case N_COMM: | |
3349 | case N_SETV: | |
3350 | case N_FN: | |
3351 | /* Ignore symbols that are not externally visible. */ | |
3352 | continue; | |
3353 | case N_INDR: | |
3354 | /* Ignore local indirect symbol. */ | |
3355 | ++p; | |
3356 | ++sym_hash; | |
3357 | continue; | |
3358 | ||
3359 | case N_UNDF | N_EXT: | |
3360 | if (value == 0) | |
3361 | { | |
3362 | section = bfd_und_section_ptr; | |
3363 | flags = 0; | |
3364 | } | |
3365 | else | |
3366 | section = bfd_com_section_ptr; | |
3367 | break; | |
3368 | case N_ABS | N_EXT: | |
3369 | section = bfd_abs_section_ptr; | |
3370 | break; | |
3371 | case N_TEXT | N_EXT: | |
3372 | section = obj_textsec (abfd); | |
3373 | value -= bfd_get_section_vma (abfd, section); | |
3374 | break; | |
3375 | case N_DATA | N_EXT: | |
3376 | case N_SETV | N_EXT: | |
3377 | /* Treat N_SETV symbols as N_DATA symbol; see comment in | |
3378 | translate_from_native_sym_flags. */ | |
3379 | section = obj_datasec (abfd); | |
3380 | value -= bfd_get_section_vma (abfd, section); | |
3381 | break; | |
3382 | case N_BSS | N_EXT: | |
3383 | section = obj_bsssec (abfd); | |
3384 | value -= bfd_get_section_vma (abfd, section); | |
3385 | break; | |
3386 | case N_INDR | N_EXT: | |
3387 | /* An indirect symbol. The next symbol is the symbol | |
3388 | which this one really is. */ | |
3389 | BFD_ASSERT (p + 1 < pend); | |
3390 | ++p; | |
3391 | string = strings + GET_WORD (abfd, p->e_strx); | |
3392 | section = bfd_ind_section_ptr; | |
3393 | flags |= BSF_INDIRECT; | |
3394 | break; | |
3395 | case N_COMM | N_EXT: | |
3396 | section = bfd_com_section_ptr; | |
3397 | break; | |
3398 | case N_SETA: case N_SETA | N_EXT: | |
3399 | section = bfd_abs_section_ptr; | |
3400 | flags |= BSF_CONSTRUCTOR; | |
3401 | break; | |
3402 | case N_SETT: case N_SETT | N_EXT: | |
3403 | section = obj_textsec (abfd); | |
3404 | flags |= BSF_CONSTRUCTOR; | |
3405 | value -= bfd_get_section_vma (abfd, section); | |
3406 | break; | |
3407 | case N_SETD: case N_SETD | N_EXT: | |
3408 | section = obj_datasec (abfd); | |
3409 | flags |= BSF_CONSTRUCTOR; | |
3410 | value -= bfd_get_section_vma (abfd, section); | |
3411 | break; | |
3412 | case N_SETB: case N_SETB | N_EXT: | |
3413 | section = obj_bsssec (abfd); | |
3414 | flags |= BSF_CONSTRUCTOR; | |
3415 | value -= bfd_get_section_vma (abfd, section); | |
3416 | break; | |
3417 | case N_WARNING: | |
3418 | /* A warning symbol. The next symbol is the one to warn | |
3419 | about. */ | |
3420 | BFD_ASSERT (p + 1 < pend); | |
3421 | ++p; | |
3422 | string = name; | |
3423 | name = strings + GET_WORD (abfd, p->e_strx); | |
3424 | section = bfd_und_section_ptr; | |
3425 | flags |= BSF_WARNING; | |
3426 | break; | |
3427 | case N_WEAKU: | |
3428 | section = bfd_und_section_ptr; | |
3429 | flags = BSF_WEAK; | |
3430 | break; | |
3431 | case N_WEAKA: | |
3432 | section = bfd_abs_section_ptr; | |
3433 | flags = BSF_WEAK; | |
3434 | break; | |
3435 | case N_WEAKT: | |
3436 | section = obj_textsec (abfd); | |
3437 | value -= bfd_get_section_vma (abfd, section); | |
3438 | flags = BSF_WEAK; | |
3439 | break; | |
3440 | case N_WEAKD: | |
3441 | section = obj_datasec (abfd); | |
3442 | value -= bfd_get_section_vma (abfd, section); | |
3443 | flags = BSF_WEAK; | |
3444 | break; | |
3445 | case N_WEAKB: | |
3446 | section = obj_bsssec (abfd); | |
3447 | value -= bfd_get_section_vma (abfd, section); | |
3448 | flags = BSF_WEAK; | |
3449 | break; | |
3450 | } | |
3451 | ||
3452 | if (! ((*add_one_symbol) | |
3453 | (info, abfd, name, flags, section, value, string, copy, false, | |
3454 | (struct bfd_link_hash_entry **) sym_hash))) | |
3455 | return false; | |
3456 | ||
3457 | /* Restrict the maximum alignment of a common symbol based on | |
3458 | the architecture, since a.out has no way to represent | |
3459 | alignment requirements of a section in a .o file. FIXME: | |
3460 | This isn't quite right: it should use the architecture of the | |
3461 | output file, not the input files. */ | |
3462 | if ((*sym_hash)->root.type == bfd_link_hash_common | |
3463 | && ((*sym_hash)->root.u.c.p->alignment_power > | |
3464 | bfd_get_arch_info (abfd)->section_align_power)) | |
3465 | (*sym_hash)->root.u.c.p->alignment_power = | |
3466 | bfd_get_arch_info (abfd)->section_align_power; | |
3467 | ||
3468 | /* If this is a set symbol, and we are not building sets, then | |
3469 | it is possible for the hash entry to not have been set. In | |
3470 | such a case, treat the symbol as not globally defined. */ | |
3471 | if ((*sym_hash)->root.type == bfd_link_hash_new) | |
3472 | { | |
3473 | BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0); | |
3474 | *sym_hash = NULL; | |
3475 | } | |
3476 | ||
3477 | if (type == (N_INDR | N_EXT) || type == N_WARNING) | |
3478 | ++sym_hash; | |
3479 | } | |
3480 | ||
3481 | return true; | |
3482 | } | |
3483 | \f | |
3484 | /* A hash table used for header files with N_BINCL entries. */ | |
3485 | ||
3486 | struct aout_link_includes_table | |
3487 | { | |
3488 | struct bfd_hash_table root; | |
3489 | }; | |
3490 | ||
3491 | /* A linked list of totals that we have found for a particular header | |
3492 | file. */ | |
3493 | ||
3494 | struct aout_link_includes_totals | |
3495 | { | |
3496 | struct aout_link_includes_totals *next; | |
3497 | bfd_vma total; | |
3498 | }; | |
3499 | ||
3500 | /* An entry in the header file hash table. */ | |
3501 | ||
3502 | struct aout_link_includes_entry | |
3503 | { | |
3504 | struct bfd_hash_entry root; | |
3505 | /* List of totals we have found for this file. */ | |
3506 | struct aout_link_includes_totals *totals; | |
3507 | }; | |
3508 | ||
3509 | /* Look up an entry in an the header file hash table. */ | |
3510 | ||
3511 | #define aout_link_includes_lookup(table, string, create, copy) \ | |
3512 | ((struct aout_link_includes_entry *) \ | |
3513 | bfd_hash_lookup (&(table)->root, (string), (create), (copy))) | |
3514 | ||
3515 | /* During the final link step we need to pass around a bunch of | |
3516 | information, so we do it in an instance of this structure. */ | |
3517 | ||
3518 | struct aout_final_link_info | |
3519 | { | |
3520 | /* General link information. */ | |
3521 | struct bfd_link_info *info; | |
3522 | /* Output bfd. */ | |
3523 | bfd *output_bfd; | |
3524 | /* Reloc file positions. */ | |
3525 | file_ptr treloff, dreloff; | |
3526 | /* File position of symbols. */ | |
3527 | file_ptr symoff; | |
3528 | /* String table. */ | |
3529 | struct bfd_strtab_hash *strtab; | |
3530 | /* Header file hash table. */ | |
3531 | struct aout_link_includes_table includes; | |
3532 | /* A buffer large enough to hold the contents of any section. */ | |
3533 | bfd_byte *contents; | |
3534 | /* A buffer large enough to hold the relocs of any section. */ | |
3535 | PTR relocs; | |
3536 | /* A buffer large enough to hold the symbol map of any input BFD. */ | |
3537 | int *symbol_map; | |
3538 | /* A buffer large enough to hold output symbols of any input BFD. */ | |
3539 | struct external_nlist *output_syms; | |
3540 | }; | |
3541 | ||
3542 | static struct bfd_hash_entry *aout_link_includes_newfunc | |
3543 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
3544 | static boolean aout_link_input_bfd | |
3545 | PARAMS ((struct aout_final_link_info *, bfd *input_bfd)); | |
3546 | static boolean aout_link_write_symbols | |
3547 | PARAMS ((struct aout_final_link_info *, bfd *input_bfd)); | |
3548 | static boolean aout_link_write_other_symbol | |
3549 | PARAMS ((struct aout_link_hash_entry *, PTR)); | |
3550 | static boolean aout_link_input_section | |
3551 | PARAMS ((struct aout_final_link_info *, bfd *input_bfd, | |
3552 | asection *input_section, file_ptr *reloff_ptr, | |
3553 | bfd_size_type rel_size)); | |
3554 | static boolean aout_link_input_section_std | |
3555 | PARAMS ((struct aout_final_link_info *, bfd *input_bfd, | |
3556 | asection *input_section, struct reloc_std_external *, | |
3557 | bfd_size_type rel_size, bfd_byte *contents)); | |
3558 | static boolean aout_link_input_section_ext | |
3559 | PARAMS ((struct aout_final_link_info *, bfd *input_bfd, | |
3560 | asection *input_section, struct reloc_ext_external *, | |
3561 | bfd_size_type rel_size, bfd_byte *contents)); | |
3562 | static INLINE asection *aout_reloc_index_to_section | |
3563 | PARAMS ((bfd *, int)); | |
3564 | static boolean aout_link_reloc_link_order | |
3565 | PARAMS ((struct aout_final_link_info *, asection *, | |
3566 | struct bfd_link_order *)); | |
3567 | ||
3568 | /* The function to create a new entry in the header file hash table. */ | |
3569 | ||
3570 | static struct bfd_hash_entry * | |
3571 | aout_link_includes_newfunc (entry, table, string) | |
3572 | struct bfd_hash_entry *entry; | |
3573 | struct bfd_hash_table *table; | |
3574 | const char *string; | |
3575 | { | |
3576 | struct aout_link_includes_entry *ret = | |
3577 | (struct aout_link_includes_entry *) entry; | |
3578 | ||
3579 | /* Allocate the structure if it has not already been allocated by a | |
3580 | subclass. */ | |
3581 | if (ret == (struct aout_link_includes_entry *) NULL) | |
3582 | ret = ((struct aout_link_includes_entry *) | |
3583 | bfd_hash_allocate (table, | |
3584 | sizeof (struct aout_link_includes_entry))); | |
3585 | if (ret == (struct aout_link_includes_entry *) NULL) | |
3586 | return (struct bfd_hash_entry *) ret; | |
3587 | ||
3588 | /* Call the allocation method of the superclass. */ | |
3589 | ret = ((struct aout_link_includes_entry *) | |
3590 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); | |
3591 | if (ret) | |
3592 | { | |
3593 | /* Set local fields. */ | |
3594 | ret->totals = NULL; | |
3595 | } | |
3596 | ||
3597 | return (struct bfd_hash_entry *) ret; | |
3598 | } | |
3599 | ||
3600 | /* Do the final link step. This is called on the output BFD. The | |
3601 | INFO structure should point to a list of BFDs linked through the | |
3602 | link_next field which can be used to find each BFD which takes part | |
3603 | in the output. Also, each section in ABFD should point to a list | |
3604 | of bfd_link_order structures which list all the input sections for | |
3605 | the output section. */ | |
3606 | ||
3607 | boolean | |
3608 | NAME(aout,final_link) (abfd, info, callback) | |
3609 | bfd *abfd; | |
3610 | struct bfd_link_info *info; | |
3611 | void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *)); | |
3612 | { | |
3613 | struct aout_final_link_info aout_info; | |
3614 | boolean includes_hash_initialized = false; | |
3615 | register bfd *sub; | |
3616 | bfd_size_type trsize, drsize; | |
3617 | size_t max_contents_size; | |
3618 | size_t max_relocs_size; | |
3619 | size_t max_sym_count; | |
3620 | bfd_size_type text_size; | |
3621 | file_ptr text_end; | |
3622 | register struct bfd_link_order *p; | |
3623 | asection *o; | |
3624 | boolean have_link_order_relocs; | |
3625 | ||
3626 | if (info->shared) | |
3627 | abfd->flags |= DYNAMIC; | |
3628 | ||
3629 | aout_info.info = info; | |
3630 | aout_info.output_bfd = abfd; | |
3631 | aout_info.contents = NULL; | |
3632 | aout_info.relocs = NULL; | |
3633 | aout_info.symbol_map = NULL; | |
3634 | aout_info.output_syms = NULL; | |
3635 | ||
3636 | if (! bfd_hash_table_init_n (&aout_info.includes.root, | |
3637 | aout_link_includes_newfunc, | |
3638 | 251)) | |
3639 | goto error_return; | |
3640 | includes_hash_initialized = true; | |
3641 | ||
3642 | /* Figure out the largest section size. Also, if generating | |
3643 | relocateable output, count the relocs. */ | |
3644 | trsize = 0; | |
3645 | drsize = 0; | |
3646 | max_contents_size = 0; | |
3647 | max_relocs_size = 0; | |
3648 | max_sym_count = 0; | |
3649 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
3650 | { | |
3651 | size_t sz; | |
3652 | ||
3653 | if (info->relocateable) | |
3654 | { | |
3655 | if (bfd_get_flavour (sub) == bfd_target_aout_flavour) | |
3656 | { | |
3657 | trsize += exec_hdr (sub)->a_trsize; | |
3658 | drsize += exec_hdr (sub)->a_drsize; | |
3659 | } | |
3660 | else | |
3661 | { | |
3662 | /* FIXME: We need to identify the .text and .data sections | |
3663 | and call get_reloc_upper_bound and canonicalize_reloc to | |
3664 | work out the number of relocs needed, and then multiply | |
3665 | by the reloc size. */ | |
3666 | (*_bfd_error_handler) | |
3667 | (_("%s: relocateable link from %s to %s not supported"), | |
3668 | bfd_get_filename (abfd), | |
3669 | sub->xvec->name, abfd->xvec->name); | |
3670 | bfd_set_error (bfd_error_invalid_operation); | |
3671 | goto error_return; | |
3672 | } | |
3673 | } | |
3674 | ||
3675 | if (bfd_get_flavour (sub) == bfd_target_aout_flavour) | |
3676 | { | |
3677 | sz = bfd_section_size (sub, obj_textsec (sub)); | |
3678 | if (sz > max_contents_size) | |
3679 | max_contents_size = sz; | |
3680 | sz = bfd_section_size (sub, obj_datasec (sub)); | |
3681 | if (sz > max_contents_size) | |
3682 | max_contents_size = sz; | |
3683 | ||
3684 | sz = exec_hdr (sub)->a_trsize; | |
3685 | if (sz > max_relocs_size) | |
3686 | max_relocs_size = sz; | |
3687 | sz = exec_hdr (sub)->a_drsize; | |
3688 | if (sz > max_relocs_size) | |
3689 | max_relocs_size = sz; | |
3690 | ||
3691 | sz = obj_aout_external_sym_count (sub); | |
3692 | if (sz > max_sym_count) | |
3693 | max_sym_count = sz; | |
3694 | } | |
3695 | } | |
3696 | ||
3697 | if (info->relocateable) | |
3698 | { | |
3699 | if (obj_textsec (abfd) != (asection *) NULL) | |
3700 | trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd) | |
3701 | ->link_order_head) | |
3702 | * obj_reloc_entry_size (abfd)); | |
3703 | if (obj_datasec (abfd) != (asection *) NULL) | |
3704 | drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd) | |
3705 | ->link_order_head) | |
3706 | * obj_reloc_entry_size (abfd)); | |
3707 | } | |
3708 | ||
3709 | exec_hdr (abfd)->a_trsize = trsize; | |
3710 | exec_hdr (abfd)->a_drsize = drsize; | |
3711 | ||
3712 | exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); | |
3713 | ||
3714 | /* Adjust the section sizes and vmas according to the magic number. | |
3715 | This sets a_text, a_data and a_bss in the exec_hdr and sets the | |
3716 | filepos for each section. */ | |
3717 | if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) | |
3718 | goto error_return; | |
3719 | ||
3720 | /* The relocation and symbol file positions differ among a.out | |
3721 | targets. We are passed a callback routine from the backend | |
3722 | specific code to handle this. | |
3723 | FIXME: At this point we do not know how much space the symbol | |
3724 | table will require. This will not work for any (nonstandard) | |
3725 | a.out target that needs to know the symbol table size before it | |
3726 | can compute the relocation file positions. This may or may not | |
3727 | be the case for the hp300hpux target, for example. */ | |
3728 | (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff, | |
3729 | &aout_info.symoff); | |
3730 | obj_textsec (abfd)->rel_filepos = aout_info.treloff; | |
3731 | obj_datasec (abfd)->rel_filepos = aout_info.dreloff; | |
3732 | obj_sym_filepos (abfd) = aout_info.symoff; | |
3733 | ||
3734 | /* We keep a count of the symbols as we output them. */ | |
3735 | obj_aout_external_sym_count (abfd) = 0; | |
3736 | ||
3737 | /* We accumulate the string table as we write out the symbols. */ | |
3738 | aout_info.strtab = _bfd_stringtab_init (); | |
3739 | if (aout_info.strtab == NULL) | |
3740 | goto error_return; | |
3741 | ||
3742 | /* Allocate buffers to hold section contents and relocs. */ | |
3743 | aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size); | |
3744 | aout_info.relocs = (PTR) bfd_malloc (max_relocs_size); | |
3745 | aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *)); | |
3746 | aout_info.output_syms = ((struct external_nlist *) | |
3747 | bfd_malloc ((max_sym_count + 1) | |
3748 | * sizeof (struct external_nlist))); | |
3749 | if ((aout_info.contents == NULL && max_contents_size != 0) | |
3750 | || (aout_info.relocs == NULL && max_relocs_size != 0) | |
3751 | || (aout_info.symbol_map == NULL && max_sym_count != 0) | |
3752 | || aout_info.output_syms == NULL) | |
3753 | goto error_return; | |
3754 | ||
3755 | /* If we have a symbol named __DYNAMIC, force it out now. This is | |
3756 | required by SunOS. Doing this here rather than in sunos.c is a | |
3757 | hack, but it's easier than exporting everything which would be | |
3758 | needed. */ | |
3759 | { | |
3760 | struct aout_link_hash_entry *h; | |
3761 | ||
3762 | h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC", | |
3763 | false, false, false); | |
3764 | if (h != NULL) | |
3765 | aout_link_write_other_symbol (h, &aout_info); | |
3766 | } | |
3767 | ||
3768 | /* The most time efficient way to do the link would be to read all | |
3769 | the input object files into memory and then sort out the | |
3770 | information into the output file. Unfortunately, that will | |
3771 | probably use too much memory. Another method would be to step | |
3772 | through everything that composes the text section and write it | |
3773 | out, and then everything that composes the data section and write | |
3774 | it out, and then write out the relocs, and then write out the | |
3775 | symbols. Unfortunately, that requires reading stuff from each | |
3776 | input file several times, and we will not be able to keep all the | |
3777 | input files open simultaneously, and reopening them will be slow. | |
3778 | ||
3779 | What we do is basically process one input file at a time. We do | |
3780 | everything we need to do with an input file once--copy over the | |
3781 | section contents, handle the relocation information, and write | |
3782 | out the symbols--and then we throw away the information we read | |
3783 | from it. This approach requires a lot of lseeks of the output | |
3784 | file, which is unfortunate but still faster than reopening a lot | |
3785 | of files. | |
3786 | ||
3787 | We use the output_has_begun field of the input BFDs to see | |
3788 | whether we have already handled it. */ | |
3789 | for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next) | |
3790 | sub->output_has_begun = false; | |
3791 | ||
3792 | /* Mark all sections which are to be included in the link. This | |
3793 | will normally be every section. We need to do this so that we | |
3794 | can identify any sections which the linker has decided to not | |
3795 | include. */ | |
3796 | for (o = abfd->sections; o != NULL; o = o->next) | |
3797 | { | |
3798 | for (p = o->link_order_head; p != NULL; p = p->next) | |
3799 | { | |
3800 | if (p->type == bfd_indirect_link_order) | |
3801 | p->u.indirect.section->linker_mark = true; | |
3802 | } | |
3803 | } | |
3804 | ||
3805 | have_link_order_relocs = false; | |
3806 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
3807 | { | |
3808 | for (p = o->link_order_head; | |
3809 | p != (struct bfd_link_order *) NULL; | |
3810 | p = p->next) | |
3811 | { | |
3812 | if (p->type == bfd_indirect_link_order | |
3813 | && (bfd_get_flavour (p->u.indirect.section->owner) | |
3814 | == bfd_target_aout_flavour)) | |
3815 | { | |
3816 | bfd *input_bfd; | |
3817 | ||
3818 | input_bfd = p->u.indirect.section->owner; | |
3819 | if (! input_bfd->output_has_begun) | |
3820 | { | |
3821 | if (! aout_link_input_bfd (&aout_info, input_bfd)) | |
3822 | goto error_return; | |
3823 | input_bfd->output_has_begun = true; | |
3824 | } | |
3825 | } | |
3826 | else if (p->type == bfd_section_reloc_link_order | |
3827 | || p->type == bfd_symbol_reloc_link_order) | |
3828 | { | |
3829 | /* These are handled below. */ | |
3830 | have_link_order_relocs = true; | |
3831 | } | |
3832 | else | |
3833 | { | |
3834 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
3835 | goto error_return; | |
3836 | } | |
3837 | } | |
3838 | } | |
3839 | ||
3840 | /* Write out any symbols that we have not already written out. */ | |
3841 | aout_link_hash_traverse (aout_hash_table (info), | |
3842 | aout_link_write_other_symbol, | |
3843 | (PTR) &aout_info); | |
3844 | ||
3845 | /* Now handle any relocs we were asked to create by the linker. | |
3846 | These did not come from any input file. We must do these after | |
3847 | we have written out all the symbols, so that we know the symbol | |
3848 | indices to use. */ | |
3849 | if (have_link_order_relocs) | |
3850 | { | |
3851 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
3852 | { | |
3853 | for (p = o->link_order_head; | |
3854 | p != (struct bfd_link_order *) NULL; | |
3855 | p = p->next) | |
3856 | { | |
3857 | if (p->type == bfd_section_reloc_link_order | |
3858 | || p->type == bfd_symbol_reloc_link_order) | |
3859 | { | |
3860 | if (! aout_link_reloc_link_order (&aout_info, o, p)) | |
3861 | goto error_return; | |
3862 | } | |
3863 | } | |
3864 | } | |
3865 | } | |
3866 | ||
3867 | if (aout_info.contents != NULL) | |
3868 | { | |
3869 | free (aout_info.contents); | |
3870 | aout_info.contents = NULL; | |
3871 | } | |
3872 | if (aout_info.relocs != NULL) | |
3873 | { | |
3874 | free (aout_info.relocs); | |
3875 | aout_info.relocs = NULL; | |
3876 | } | |
3877 | if (aout_info.symbol_map != NULL) | |
3878 | { | |
3879 | free (aout_info.symbol_map); | |
3880 | aout_info.symbol_map = NULL; | |
3881 | } | |
3882 | if (aout_info.output_syms != NULL) | |
3883 | { | |
3884 | free (aout_info.output_syms); | |
3885 | aout_info.output_syms = NULL; | |
3886 | } | |
3887 | if (includes_hash_initialized) | |
3888 | { | |
3889 | bfd_hash_table_free (&aout_info.includes.root); | |
3890 | includes_hash_initialized = false; | |
3891 | } | |
3892 | ||
3893 | /* Finish up any dynamic linking we may be doing. */ | |
3894 | if (aout_backend_info (abfd)->finish_dynamic_link != NULL) | |
3895 | { | |
3896 | if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info)) | |
3897 | goto error_return; | |
3898 | } | |
3899 | ||
3900 | /* Update the header information. */ | |
3901 | abfd->symcount = obj_aout_external_sym_count (abfd); | |
3902 | exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE; | |
3903 | obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms; | |
3904 | obj_textsec (abfd)->reloc_count = | |
3905 | exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); | |
3906 | obj_datasec (abfd)->reloc_count = | |
3907 | exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); | |
3908 | ||
3909 | /* Write out the string table, unless there are no symbols. */ | |
3910 | if (abfd->symcount > 0) | |
3911 | { | |
3912 | if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 | |
3913 | || ! emit_stringtab (abfd, aout_info.strtab)) | |
3914 | goto error_return; | |
3915 | } | |
3916 | else if (obj_textsec (abfd)->reloc_count == 0 | |
3917 | && obj_datasec (abfd)->reloc_count == 0) | |
3918 | { | |
3919 | bfd_byte b; | |
3920 | ||
3921 | b = 0; | |
3922 | if (bfd_seek (abfd, | |
3923 | (obj_datasec (abfd)->filepos | |
3924 | + exec_hdr (abfd)->a_data | |
3925 | - 1), | |
3926 | SEEK_SET) != 0 | |
3927 | || bfd_write (&b, 1, 1, abfd) != 1) | |
3928 | goto error_return; | |
3929 | } | |
3930 | ||
3931 | return true; | |
3932 | ||
3933 | error_return: | |
3934 | if (aout_info.contents != NULL) | |
3935 | free (aout_info.contents); | |
3936 | if (aout_info.relocs != NULL) | |
3937 | free (aout_info.relocs); | |
3938 | if (aout_info.symbol_map != NULL) | |
3939 | free (aout_info.symbol_map); | |
3940 | if (aout_info.output_syms != NULL) | |
3941 | free (aout_info.output_syms); | |
3942 | if (includes_hash_initialized) | |
3943 | bfd_hash_table_free (&aout_info.includes.root); | |
3944 | return false; | |
3945 | } | |
3946 | ||
3947 | /* Link an a.out input BFD into the output file. */ | |
3948 | ||
3949 | static boolean | |
3950 | aout_link_input_bfd (finfo, input_bfd) | |
3951 | struct aout_final_link_info *finfo; | |
3952 | bfd *input_bfd; | |
3953 | { | |
3954 | bfd_size_type sym_count; | |
3955 | ||
3956 | BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object); | |
3957 | ||
3958 | /* If this is a dynamic object, it may need special handling. */ | |
3959 | if ((input_bfd->flags & DYNAMIC) != 0 | |
3960 | && aout_backend_info (input_bfd)->link_dynamic_object != NULL) | |
3961 | { | |
3962 | return ((*aout_backend_info (input_bfd)->link_dynamic_object) | |
3963 | (finfo->info, input_bfd)); | |
3964 | } | |
3965 | ||
3966 | /* Get the symbols. We probably have them already, unless | |
3967 | finfo->info->keep_memory is false. */ | |
3968 | if (! aout_get_external_symbols (input_bfd)) | |
3969 | return false; | |
3970 | ||
3971 | sym_count = obj_aout_external_sym_count (input_bfd); | |
3972 | ||
3973 | /* Write out the symbols and get a map of the new indices. The map | |
3974 | is placed into finfo->symbol_map. */ | |
3975 | if (! aout_link_write_symbols (finfo, input_bfd)) | |
3976 | return false; | |
3977 | ||
3978 | /* Relocate and write out the sections. These functions use the | |
3979 | symbol map created by aout_link_write_symbols. The linker_mark | |
3980 | field will be set if these sections are to be included in the | |
3981 | link, which will normally be the case. */ | |
3982 | if (obj_textsec (input_bfd)->linker_mark) | |
3983 | { | |
3984 | if (! aout_link_input_section (finfo, input_bfd, | |
3985 | obj_textsec (input_bfd), | |
3986 | &finfo->treloff, | |
3987 | exec_hdr (input_bfd)->a_trsize)) | |
3988 | return false; | |
3989 | } | |
3990 | if (obj_datasec (input_bfd)->linker_mark) | |
3991 | { | |
3992 | if (! aout_link_input_section (finfo, input_bfd, | |
3993 | obj_datasec (input_bfd), | |
3994 | &finfo->dreloff, | |
3995 | exec_hdr (input_bfd)->a_drsize)) | |
3996 | return false; | |
3997 | } | |
3998 | ||
3999 | /* If we are not keeping memory, we don't need the symbols any | |
4000 | longer. We still need them if we are keeping memory, because the | |
4001 | strings in the hash table point into them. */ | |
4002 | if (! finfo->info->keep_memory) | |
4003 | { | |
4004 | if (! aout_link_free_symbols (input_bfd)) | |
4005 | return false; | |
4006 | } | |
4007 | ||
4008 | return true; | |
4009 | } | |
4010 | ||
4011 | /* Adjust and write out the symbols for an a.out file. Set the new | |
4012 | symbol indices into a symbol_map. */ | |
4013 | ||
4014 | static boolean | |
4015 | aout_link_write_symbols (finfo, input_bfd) | |
4016 | struct aout_final_link_info *finfo; | |
4017 | bfd *input_bfd; | |
4018 | { | |
4019 | bfd *output_bfd; | |
4020 | bfd_size_type sym_count; | |
4021 | char *strings; | |
4022 | enum bfd_link_strip strip; | |
4023 | enum bfd_link_discard discard; | |
4024 | struct external_nlist *outsym; | |
4025 | bfd_size_type strtab_index; | |
4026 | register struct external_nlist *sym; | |
4027 | struct external_nlist *sym_end; | |
4028 | struct aout_link_hash_entry **sym_hash; | |
4029 | int *symbol_map; | |
4030 | boolean pass; | |
4031 | boolean skip_next; | |
4032 | ||
4033 | output_bfd = finfo->output_bfd; | |
4034 | sym_count = obj_aout_external_sym_count (input_bfd); | |
4035 | strings = obj_aout_external_strings (input_bfd); | |
4036 | strip = finfo->info->strip; | |
4037 | discard = finfo->info->discard; | |
4038 | outsym = finfo->output_syms; | |
4039 | ||
4040 | /* First write out a symbol for this object file, unless we are | |
4041 | discarding such symbols. */ | |
4042 | if (strip != strip_all | |
4043 | && (strip != strip_some | |
4044 | || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename, | |
4045 | false, false) != NULL) | |
4046 | && discard != discard_all) | |
4047 | { | |
4048 | bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type); | |
4049 | bfd_h_put_8 (output_bfd, 0, outsym->e_other); | |
4050 | bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc); | |
4051 | strtab_index = add_to_stringtab (output_bfd, finfo->strtab, | |
4052 | input_bfd->filename, false); | |
4053 | if (strtab_index == (bfd_size_type) -1) | |
4054 | return false; | |
4055 | PUT_WORD (output_bfd, strtab_index, outsym->e_strx); | |
4056 | PUT_WORD (output_bfd, | |
4057 | (bfd_get_section_vma (output_bfd, | |
4058 | obj_textsec (input_bfd)->output_section) | |
4059 | + obj_textsec (input_bfd)->output_offset), | |
4060 | outsym->e_value); | |
4061 | ++obj_aout_external_sym_count (output_bfd); | |
4062 | ++outsym; | |
4063 | } | |
4064 | ||
4065 | pass = false; | |
4066 | skip_next = false; | |
4067 | sym = obj_aout_external_syms (input_bfd); | |
4068 | sym_end = sym + sym_count; | |
4069 | sym_hash = obj_aout_sym_hashes (input_bfd); | |
4070 | symbol_map = finfo->symbol_map; | |
4071 | memset (symbol_map, 0, sym_count * sizeof *symbol_map); | |
4072 | for (; sym < sym_end; sym++, sym_hash++, symbol_map++) | |
4073 | { | |
4074 | const char *name; | |
4075 | int type; | |
4076 | struct aout_link_hash_entry *h; | |
4077 | boolean skip; | |
4078 | asection *symsec; | |
4079 | bfd_vma val = 0; | |
4080 | boolean copy; | |
4081 | ||
4082 | /* We set *symbol_map to 0 above for all symbols. If it has | |
4083 | already been set to -1 for this symbol, it means that we are | |
4084 | discarding it because it appears in a duplicate header file. | |
4085 | See the N_BINCL code below. */ | |
4086 | if (*symbol_map == -1) | |
4087 | continue; | |
4088 | ||
4089 | /* Initialize *symbol_map to -1, which means that the symbol was | |
4090 | not copied into the output file. We will change it later if | |
4091 | we do copy the symbol over. */ | |
4092 | *symbol_map = -1; | |
4093 | ||
4094 | type = bfd_h_get_8 (input_bfd, sym->e_type); | |
4095 | name = strings + GET_WORD (input_bfd, sym->e_strx); | |
4096 | ||
4097 | h = NULL; | |
4098 | ||
4099 | if (pass) | |
4100 | { | |
4101 | /* Pass this symbol through. It is the target of an | |
4102 | indirect or warning symbol. */ | |
4103 | val = GET_WORD (input_bfd, sym->e_value); | |
4104 | pass = false; | |
4105 | } | |
4106 | else if (skip_next) | |
4107 | { | |
4108 | /* Skip this symbol, which is the target of an indirect | |
4109 | symbol that we have changed to no longer be an indirect | |
4110 | symbol. */ | |
4111 | skip_next = false; | |
4112 | continue; | |
4113 | } | |
4114 | else | |
4115 | { | |
4116 | struct aout_link_hash_entry *hresolve; | |
4117 | ||
4118 | /* We have saved the hash table entry for this symbol, if | |
4119 | there is one. Note that we could just look it up again | |
4120 | in the hash table, provided we first check that it is an | |
4121 | external symbol. */ | |
4122 | h = *sym_hash; | |
4123 | ||
4124 | /* Use the name from the hash table, in case the symbol was | |
4125 | wrapped. */ | |
4126 | if (h != NULL) | |
4127 | name = h->root.root.string; | |
4128 | ||
4129 | /* If this is an indirect or warning symbol, then change | |
4130 | hresolve to the base symbol. We also change *sym_hash so | |
4131 | that the relocation routines relocate against the real | |
4132 | symbol. */ | |
4133 | hresolve = h; | |
4134 | if (h != (struct aout_link_hash_entry *) NULL | |
4135 | && (h->root.type == bfd_link_hash_indirect | |
4136 | || h->root.type == bfd_link_hash_warning)) | |
4137 | { | |
4138 | hresolve = (struct aout_link_hash_entry *) h->root.u.i.link; | |
4139 | while (hresolve->root.type == bfd_link_hash_indirect | |
4140 | || hresolve->root.type == bfd_link_hash_warning) | |
4141 | hresolve = ((struct aout_link_hash_entry *) | |
4142 | hresolve->root.u.i.link); | |
4143 | *sym_hash = hresolve; | |
4144 | } | |
4145 | ||
4146 | /* If the symbol has already been written out, skip it. */ | |
4147 | if (h != (struct aout_link_hash_entry *) NULL | |
4148 | && h->root.type != bfd_link_hash_warning | |
4149 | && h->written) | |
4150 | { | |
4151 | if ((type & N_TYPE) == N_INDR | |
4152 | || type == N_WARNING) | |
4153 | skip_next = true; | |
4154 | *symbol_map = h->indx; | |
4155 | continue; | |
4156 | } | |
4157 | ||
4158 | /* See if we are stripping this symbol. */ | |
4159 | skip = false; | |
4160 | switch (strip) | |
4161 | { | |
4162 | case strip_none: | |
4163 | break; | |
4164 | case strip_debugger: | |
4165 | if ((type & N_STAB) != 0) | |
4166 | skip = true; | |
4167 | break; | |
4168 | case strip_some: | |
4169 | if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) | |
4170 | == NULL) | |
4171 | skip = true; | |
4172 | break; | |
4173 | case strip_all: | |
4174 | skip = true; | |
4175 | break; | |
4176 | } | |
4177 | if (skip) | |
4178 | { | |
4179 | if (h != (struct aout_link_hash_entry *) NULL) | |
4180 | h->written = true; | |
4181 | continue; | |
4182 | } | |
4183 | ||
4184 | /* Get the value of the symbol. */ | |
4185 | if ((type & N_TYPE) == N_TEXT | |
4186 | || type == N_WEAKT) | |
4187 | symsec = obj_textsec (input_bfd); | |
4188 | else if ((type & N_TYPE) == N_DATA | |
4189 | || type == N_WEAKD) | |
4190 | symsec = obj_datasec (input_bfd); | |
4191 | else if ((type & N_TYPE) == N_BSS | |
4192 | || type == N_WEAKB) | |
4193 | symsec = obj_bsssec (input_bfd); | |
4194 | else if ((type & N_TYPE) == N_ABS | |
4195 | || type == N_WEAKA) | |
4196 | symsec = bfd_abs_section_ptr; | |
4197 | else if (((type & N_TYPE) == N_INDR | |
4198 | && (hresolve == (struct aout_link_hash_entry *) NULL | |
4199 | || (hresolve->root.type != bfd_link_hash_defined | |
4200 | && hresolve->root.type != bfd_link_hash_defweak | |
4201 | && hresolve->root.type != bfd_link_hash_common))) | |
4202 | || type == N_WARNING) | |
4203 | { | |
4204 | /* Pass the next symbol through unchanged. The | |
4205 | condition above for indirect symbols is so that if | |
4206 | the indirect symbol was defined, we output it with | |
4207 | the correct definition so the debugger will | |
4208 | understand it. */ | |
4209 | pass = true; | |
4210 | val = GET_WORD (input_bfd, sym->e_value); | |
4211 | symsec = NULL; | |
4212 | } | |
4213 | else if ((type & N_STAB) != 0) | |
4214 | { | |
4215 | val = GET_WORD (input_bfd, sym->e_value); | |
4216 | symsec = NULL; | |
4217 | } | |
4218 | else | |
4219 | { | |
4220 | /* If we get here with an indirect symbol, it means that | |
4221 | we are outputting it with a real definition. In such | |
4222 | a case we do not want to output the next symbol, | |
4223 | which is the target of the indirection. */ | |
4224 | if ((type & N_TYPE) == N_INDR) | |
4225 | skip_next = true; | |
4226 | ||
4227 | symsec = NULL; | |
4228 | ||
4229 | /* We need to get the value from the hash table. We use | |
4230 | hresolve so that if we have defined an indirect | |
4231 | symbol we output the final definition. */ | |
4232 | if (h == (struct aout_link_hash_entry *) NULL) | |
4233 | { | |
4234 | switch (type & N_TYPE) | |
4235 | { | |
4236 | case N_SETT: | |
4237 | symsec = obj_textsec (input_bfd); | |
4238 | break; | |
4239 | case N_SETD: | |
4240 | symsec = obj_datasec (input_bfd); | |
4241 | break; | |
4242 | case N_SETB: | |
4243 | symsec = obj_bsssec (input_bfd); | |
4244 | break; | |
4245 | case N_SETA: | |
4246 | symsec = bfd_abs_section_ptr; | |
4247 | break; | |
4248 | default: | |
4249 | val = 0; | |
4250 | break; | |
4251 | } | |
4252 | } | |
4253 | else if (hresolve->root.type == bfd_link_hash_defined | |
4254 | || hresolve->root.type == bfd_link_hash_defweak) | |
4255 | { | |
4256 | asection *input_section; | |
4257 | asection *output_section; | |
4258 | ||
4259 | /* This case usually means a common symbol which was | |
4260 | turned into a defined symbol. */ | |
4261 | input_section = hresolve->root.u.def.section; | |
4262 | output_section = input_section->output_section; | |
4263 | BFD_ASSERT (bfd_is_abs_section (output_section) | |
4264 | || output_section->owner == output_bfd); | |
4265 | val = (hresolve->root.u.def.value | |
4266 | + bfd_get_section_vma (output_bfd, output_section) | |
4267 | + input_section->output_offset); | |
4268 | ||
4269 | /* Get the correct type based on the section. If | |
4270 | this is a constructed set, force it to be | |
4271 | globally visible. */ | |
4272 | if (type == N_SETT | |
4273 | || type == N_SETD | |
4274 | || type == N_SETB | |
4275 | || type == N_SETA) | |
4276 | type |= N_EXT; | |
4277 | ||
4278 | type &=~ N_TYPE; | |
4279 | ||
4280 | if (output_section == obj_textsec (output_bfd)) | |
4281 | type |= (hresolve->root.type == bfd_link_hash_defined | |
4282 | ? N_TEXT | |
4283 | : N_WEAKT); | |
4284 | else if (output_section == obj_datasec (output_bfd)) | |
4285 | type |= (hresolve->root.type == bfd_link_hash_defined | |
4286 | ? N_DATA | |
4287 | : N_WEAKD); | |
4288 | else if (output_section == obj_bsssec (output_bfd)) | |
4289 | type |= (hresolve->root.type == bfd_link_hash_defined | |
4290 | ? N_BSS | |
4291 | : N_WEAKB); | |
4292 | else | |
4293 | type |= (hresolve->root.type == bfd_link_hash_defined | |
4294 | ? N_ABS | |
4295 | : N_WEAKA); | |
4296 | } | |
4297 | else if (hresolve->root.type == bfd_link_hash_common) | |
4298 | val = hresolve->root.u.c.size; | |
4299 | else if (hresolve->root.type == bfd_link_hash_undefweak) | |
4300 | { | |
4301 | val = 0; | |
4302 | type = N_WEAKU; | |
4303 | } | |
4304 | else | |
4305 | val = 0; | |
4306 | } | |
4307 | if (symsec != (asection *) NULL) | |
4308 | val = (symsec->output_section->vma | |
4309 | + symsec->output_offset | |
4310 | + (GET_WORD (input_bfd, sym->e_value) | |
4311 | - symsec->vma)); | |
4312 | ||
4313 | /* If this is a global symbol set the written flag, and if | |
4314 | it is a local symbol see if we should discard it. */ | |
4315 | if (h != (struct aout_link_hash_entry *) NULL) | |
4316 | { | |
4317 | h->written = true; | |
4318 | h->indx = obj_aout_external_sym_count (output_bfd); | |
4319 | } | |
4320 | else if ((type & N_TYPE) != N_SETT | |
4321 | && (type & N_TYPE) != N_SETD | |
4322 | && (type & N_TYPE) != N_SETB | |
4323 | && (type & N_TYPE) != N_SETA) | |
4324 | { | |
4325 | switch (discard) | |
4326 | { | |
4327 | case discard_none: | |
4328 | break; | |
4329 | case discard_l: | |
4330 | if ((type & N_STAB) == 0 | |
4331 | && bfd_is_local_label_name (input_bfd, name)) | |
4332 | skip = true; | |
4333 | break; | |
4334 | case discard_all: | |
4335 | skip = true; | |
4336 | break; | |
4337 | } | |
4338 | if (skip) | |
4339 | { | |
4340 | pass = false; | |
4341 | continue; | |
4342 | } | |
4343 | } | |
4344 | ||
4345 | /* An N_BINCL symbol indicates the start of the stabs | |
4346 | entries for a header file. We need to scan ahead to the | |
4347 | next N_EINCL symbol, ignoring nesting, adding up all the | |
4348 | characters in the symbol names, not including the file | |
4349 | numbers in types (the first number after an open | |
4350 | parenthesis). */ | |
4351 | if (type == N_BINCL) | |
4352 | { | |
4353 | struct external_nlist *incl_sym; | |
4354 | int nest; | |
4355 | struct aout_link_includes_entry *incl_entry; | |
4356 | struct aout_link_includes_totals *t; | |
4357 | ||
4358 | val = 0; | |
4359 | nest = 0; | |
4360 | for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++) | |
4361 | { | |
4362 | int incl_type; | |
4363 | ||
4364 | incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type); | |
4365 | if (incl_type == N_EINCL) | |
4366 | { | |
4367 | if (nest == 0) | |
4368 | break; | |
4369 | --nest; | |
4370 | } | |
4371 | else if (incl_type == N_BINCL) | |
4372 | ++nest; | |
4373 | else if (nest == 0) | |
4374 | { | |
4375 | const char *s; | |
4376 | ||
4377 | s = strings + GET_WORD (input_bfd, incl_sym->e_strx); | |
4378 | for (; *s != '\0'; s++) | |
4379 | { | |
4380 | val += *s; | |
4381 | if (*s == '(') | |
4382 | { | |
4383 | /* Skip the file number. */ | |
4384 | ++s; | |
4385 | while (isdigit ((unsigned char) *s)) | |
4386 | ++s; | |
4387 | --s; | |
4388 | } | |
4389 | } | |
4390 | } | |
4391 | } | |
4392 | ||
4393 | /* If we have already included a header file with the | |
4394 | same value, then replace this one with an N_EXCL | |
4395 | symbol. */ | |
4396 | copy = ! finfo->info->keep_memory; | |
4397 | incl_entry = aout_link_includes_lookup (&finfo->includes, | |
4398 | name, true, copy); | |
4399 | if (incl_entry == NULL) | |
4400 | return false; | |
4401 | for (t = incl_entry->totals; t != NULL; t = t->next) | |
4402 | if (t->total == val) | |
4403 | break; | |
4404 | if (t == NULL) | |
4405 | { | |
4406 | /* This is the first time we have seen this header | |
4407 | file with this set of stabs strings. */ | |
4408 | t = ((struct aout_link_includes_totals *) | |
4409 | bfd_hash_allocate (&finfo->includes.root, | |
4410 | sizeof *t)); | |
4411 | if (t == NULL) | |
4412 | return false; | |
4413 | t->total = val; | |
4414 | t->next = incl_entry->totals; | |
4415 | incl_entry->totals = t; | |
4416 | } | |
4417 | else | |
4418 | { | |
4419 | int *incl_map; | |
4420 | ||
4421 | /* This is a duplicate header file. We must change | |
4422 | it to be an N_EXCL entry, and mark all the | |
4423 | included symbols to prevent outputting them. */ | |
4424 | type = N_EXCL; | |
4425 | ||
4426 | nest = 0; | |
4427 | for (incl_sym = sym + 1, incl_map = symbol_map + 1; | |
4428 | incl_sym < sym_end; | |
4429 | incl_sym++, incl_map++) | |
4430 | { | |
4431 | int incl_type; | |
4432 | ||
4433 | incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type); | |
4434 | if (incl_type == N_EINCL) | |
4435 | { | |
4436 | if (nest == 0) | |
4437 | { | |
4438 | *incl_map = -1; | |
4439 | break; | |
4440 | } | |
4441 | --nest; | |
4442 | } | |
4443 | else if (incl_type == N_BINCL) | |
4444 | ++nest; | |
4445 | else if (nest == 0) | |
4446 | *incl_map = -1; | |
4447 | } | |
4448 | } | |
4449 | } | |
4450 | } | |
4451 | ||
4452 | /* Copy this symbol into the list of symbols we are going to | |
4453 | write out. */ | |
4454 | bfd_h_put_8 (output_bfd, type, outsym->e_type); | |
4455 | bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other), | |
4456 | outsym->e_other); | |
4457 | bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc), | |
4458 | outsym->e_desc); | |
4459 | copy = false; | |
4460 | if (! finfo->info->keep_memory) | |
4461 | { | |
4462 | /* name points into a string table which we are going to | |
4463 | free. If there is a hash table entry, use that string. | |
4464 | Otherwise, copy name into memory. */ | |
4465 | if (h != (struct aout_link_hash_entry *) NULL) | |
4466 | name = h->root.root.string; | |
4467 | else | |
4468 | copy = true; | |
4469 | } | |
4470 | strtab_index = add_to_stringtab (output_bfd, finfo->strtab, | |
4471 | name, copy); | |
4472 | if (strtab_index == (bfd_size_type) -1) | |
4473 | return false; | |
4474 | PUT_WORD (output_bfd, strtab_index, outsym->e_strx); | |
4475 | PUT_WORD (output_bfd, val, outsym->e_value); | |
4476 | *symbol_map = obj_aout_external_sym_count (output_bfd); | |
4477 | ++obj_aout_external_sym_count (output_bfd); | |
4478 | ++outsym; | |
4479 | } | |
4480 | ||
4481 | /* Write out the output symbols we have just constructed. */ | |
4482 | if (outsym > finfo->output_syms) | |
4483 | { | |
4484 | bfd_size_type outsym_count; | |
4485 | ||
4486 | if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0) | |
4487 | return false; | |
4488 | outsym_count = outsym - finfo->output_syms; | |
4489 | if (bfd_write ((PTR) finfo->output_syms, | |
4490 | (bfd_size_type) EXTERNAL_NLIST_SIZE, | |
4491 | (bfd_size_type) outsym_count, output_bfd) | |
4492 | != outsym_count * EXTERNAL_NLIST_SIZE) | |
4493 | return false; | |
4494 | finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE; | |
4495 | } | |
4496 | ||
4497 | return true; | |
4498 | } | |
4499 | ||
4500 | /* Write out a symbol that was not associated with an a.out input | |
4501 | object. */ | |
4502 | ||
4503 | static boolean | |
4504 | aout_link_write_other_symbol (h, data) | |
4505 | struct aout_link_hash_entry *h; | |
4506 | PTR data; | |
4507 | { | |
4508 | struct aout_final_link_info *finfo = (struct aout_final_link_info *) data; | |
4509 | bfd *output_bfd; | |
4510 | int type; | |
4511 | bfd_vma val; | |
4512 | struct external_nlist outsym; | |
4513 | bfd_size_type indx; | |
4514 | ||
4515 | output_bfd = finfo->output_bfd; | |
4516 | ||
4517 | if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL) | |
4518 | { | |
4519 | if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol) | |
4520 | (output_bfd, finfo->info, h))) | |
4521 | { | |
4522 | /* FIXME: No way to handle errors. */ | |
4523 | abort (); | |
4524 | } | |
4525 | } | |
4526 | ||
4527 | if (h->written) | |
4528 | return true; | |
4529 | ||
4530 | h->written = true; | |
4531 | ||
4532 | /* An indx of -2 means the symbol must be written. */ | |
4533 | if (h->indx != -2 | |
4534 | && (finfo->info->strip == strip_all | |
4535 | || (finfo->info->strip == strip_some | |
4536 | && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string, | |
4537 | false, false) == NULL))) | |
4538 | return true; | |
4539 | ||
4540 | switch (h->root.type) | |
4541 | { | |
4542 | default: | |
4543 | abort (); | |
4544 | /* Avoid variable not initialized warnings. */ | |
4545 | return true; | |
4546 | case bfd_link_hash_new: | |
4547 | /* This can happen for set symbols when sets are not being | |
4548 | built. */ | |
4549 | return true; | |
4550 | case bfd_link_hash_undefined: | |
4551 | type = N_UNDF | N_EXT; | |
4552 | val = 0; | |
4553 | break; | |
4554 | case bfd_link_hash_defined: | |
4555 | case bfd_link_hash_defweak: | |
4556 | { | |
4557 | asection *sec; | |
4558 | ||
4559 | sec = h->root.u.def.section->output_section; | |
4560 | BFD_ASSERT (bfd_is_abs_section (sec) | |
4561 | || sec->owner == output_bfd); | |
4562 | if (sec == obj_textsec (output_bfd)) | |
4563 | type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT; | |
4564 | else if (sec == obj_datasec (output_bfd)) | |
4565 | type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD; | |
4566 | else if (sec == obj_bsssec (output_bfd)) | |
4567 | type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB; | |
4568 | else | |
4569 | type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA; | |
4570 | type |= N_EXT; | |
4571 | val = (h->root.u.def.value | |
4572 | + sec->vma | |
4573 | + h->root.u.def.section->output_offset); | |
4574 | } | |
4575 | break; | |
4576 | case bfd_link_hash_common: | |
4577 | type = N_UNDF | N_EXT; | |
4578 | val = h->root.u.c.size; | |
4579 | break; | |
4580 | case bfd_link_hash_undefweak: | |
4581 | type = N_WEAKU; | |
4582 | val = 0; | |
4583 | case bfd_link_hash_indirect: | |
4584 | case bfd_link_hash_warning: | |
4585 | /* FIXME: Ignore these for now. The circumstances under which | |
4586 | they should be written out are not clear to me. */ | |
4587 | return true; | |
4588 | } | |
4589 | ||
4590 | bfd_h_put_8 (output_bfd, type, outsym.e_type); | |
4591 | bfd_h_put_8 (output_bfd, 0, outsym.e_other); | |
4592 | bfd_h_put_16 (output_bfd, 0, outsym.e_desc); | |
4593 | indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string, | |
4594 | false); | |
4595 | if (indx == (bfd_size_type) -1) | |
4596 | { | |
4597 | /* FIXME: No way to handle errors. */ | |
4598 | abort (); | |
4599 | } | |
4600 | PUT_WORD (output_bfd, indx, outsym.e_strx); | |
4601 | PUT_WORD (output_bfd, val, outsym.e_value); | |
4602 | ||
4603 | if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0 | |
4604 | || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE, | |
4605 | (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE) | |
4606 | { | |
4607 | /* FIXME: No way to handle errors. */ | |
4608 | abort (); | |
4609 | } | |
4610 | ||
4611 | finfo->symoff += EXTERNAL_NLIST_SIZE; | |
4612 | h->indx = obj_aout_external_sym_count (output_bfd); | |
4613 | ++obj_aout_external_sym_count (output_bfd); | |
4614 | ||
4615 | return true; | |
4616 | } | |
4617 | ||
4618 | /* Link an a.out section into the output file. */ | |
4619 | ||
4620 | static boolean | |
4621 | aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr, | |
4622 | rel_size) | |
4623 | struct aout_final_link_info *finfo; | |
4624 | bfd *input_bfd; | |
4625 | asection *input_section; | |
4626 | file_ptr *reloff_ptr; | |
4627 | bfd_size_type rel_size; | |
4628 | { | |
4629 | bfd_size_type input_size; | |
4630 | PTR relocs; | |
4631 | ||
4632 | /* Get the section contents. */ | |
4633 | input_size = bfd_section_size (input_bfd, input_section); | |
4634 | if (! bfd_get_section_contents (input_bfd, input_section, | |
4635 | (PTR) finfo->contents, | |
4636 | (file_ptr) 0, input_size)) | |
4637 | return false; | |
4638 | ||
4639 | /* Read in the relocs if we haven't already done it. */ | |
4640 | if (aout_section_data (input_section) != NULL | |
4641 | && aout_section_data (input_section)->relocs != NULL) | |
4642 | relocs = aout_section_data (input_section)->relocs; | |
4643 | else | |
4644 | { | |
4645 | relocs = finfo->relocs; | |
4646 | if (rel_size > 0) | |
4647 | { | |
4648 | if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0 | |
4649 | || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size) | |
4650 | return false; | |
4651 | } | |
4652 | } | |
4653 | ||
4654 | /* Relocate the section contents. */ | |
4655 | if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE) | |
4656 | { | |
4657 | if (! aout_link_input_section_std (finfo, input_bfd, input_section, | |
4658 | (struct reloc_std_external *) relocs, | |
4659 | rel_size, finfo->contents)) | |
4660 | return false; | |
4661 | } | |
4662 | else | |
4663 | { | |
4664 | if (! aout_link_input_section_ext (finfo, input_bfd, input_section, | |
4665 | (struct reloc_ext_external *) relocs, | |
4666 | rel_size, finfo->contents)) | |
4667 | return false; | |
4668 | } | |
4669 | ||
4670 | /* Write out the section contents. */ | |
4671 | if (! bfd_set_section_contents (finfo->output_bfd, | |
4672 | input_section->output_section, | |
4673 | (PTR) finfo->contents, | |
4674 | input_section->output_offset, | |
4675 | input_size)) | |
4676 | return false; | |
4677 | ||
4678 | /* If we are producing relocateable output, the relocs were | |
4679 | modified, and we now write them out. */ | |
4680 | if (finfo->info->relocateable && rel_size > 0) | |
4681 | { | |
4682 | if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0) | |
4683 | return false; | |
4684 | if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd) | |
4685 | != rel_size) | |
4686 | return false; | |
4687 | *reloff_ptr += rel_size; | |
4688 | ||
4689 | /* Assert that the relocs have not run into the symbols, and | |
4690 | that if these are the text relocs they have not run into the | |
4691 | data relocs. */ | |
4692 | BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) | |
4693 | && (reloff_ptr != &finfo->treloff | |
4694 | || (*reloff_ptr | |
4695 | <= obj_datasec (finfo->output_bfd)->rel_filepos))); | |
4696 | } | |
4697 | ||
4698 | return true; | |
4699 | } | |
4700 | ||
4701 | /* Get the section corresponding to a reloc index. */ | |
4702 | ||
4703 | static INLINE asection * | |
4704 | aout_reloc_index_to_section (abfd, indx) | |
4705 | bfd *abfd; | |
4706 | int indx; | |
4707 | { | |
4708 | switch (indx & N_TYPE) | |
4709 | { | |
4710 | case N_TEXT: | |
4711 | return obj_textsec (abfd); | |
4712 | case N_DATA: | |
4713 | return obj_datasec (abfd); | |
4714 | case N_BSS: | |
4715 | return obj_bsssec (abfd); | |
4716 | case N_ABS: | |
4717 | case N_UNDF: | |
4718 | return bfd_abs_section_ptr; | |
4719 | default: | |
4720 | abort (); | |
4721 | } | |
4722 | } | |
4723 | ||
4724 | /* Relocate an a.out section using standard a.out relocs. */ | |
4725 | ||
4726 | static boolean | |
4727 | aout_link_input_section_std (finfo, input_bfd, input_section, relocs, | |
4728 | rel_size, contents) | |
4729 | struct aout_final_link_info *finfo; | |
4730 | bfd *input_bfd; | |
4731 | asection *input_section; | |
4732 | struct reloc_std_external *relocs; | |
4733 | bfd_size_type rel_size; | |
4734 | bfd_byte *contents; | |
4735 | { | |
4736 | boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *, | |
4737 | bfd *, asection *, | |
4738 | struct aout_link_hash_entry *, | |
4739 | PTR, bfd_byte *, boolean *, | |
4740 | bfd_vma *)); | |
4741 | bfd *output_bfd; | |
4742 | boolean relocateable; | |
4743 | struct external_nlist *syms; | |
4744 | char *strings; | |
4745 | struct aout_link_hash_entry **sym_hashes; | |
4746 | int *symbol_map; | |
4747 | bfd_size_type reloc_count; | |
4748 | register struct reloc_std_external *rel; | |
4749 | struct reloc_std_external *rel_end; | |
4750 | ||
4751 | output_bfd = finfo->output_bfd; | |
4752 | check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; | |
4753 | ||
4754 | BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE); | |
4755 | BFD_ASSERT (input_bfd->xvec->header_byteorder | |
4756 | == output_bfd->xvec->header_byteorder); | |
4757 | ||
4758 | relocateable = finfo->info->relocateable; | |
4759 | syms = obj_aout_external_syms (input_bfd); | |
4760 | strings = obj_aout_external_strings (input_bfd); | |
4761 | sym_hashes = obj_aout_sym_hashes (input_bfd); | |
4762 | symbol_map = finfo->symbol_map; | |
4763 | ||
4764 | reloc_count = rel_size / RELOC_STD_SIZE; | |
4765 | rel = relocs; | |
4766 | rel_end = rel + reloc_count; | |
4767 | for (; rel < rel_end; rel++) | |
4768 | { | |
4769 | bfd_vma r_addr; | |
4770 | int r_index; | |
4771 | int r_extern; | |
4772 | int r_pcrel; | |
4773 | int r_baserel = 0; | |
4774 | reloc_howto_type *howto; | |
4775 | struct aout_link_hash_entry *h = NULL; | |
4776 | bfd_vma relocation; | |
4777 | bfd_reloc_status_type r; | |
4778 | ||
4779 | r_addr = GET_SWORD (input_bfd, rel->r_address); | |
4780 | ||
4781 | #ifdef MY_reloc_howto | |
4782 | howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel); | |
4783 | #else | |
4784 | { | |
4785 | int r_jmptable; | |
4786 | int r_relative; | |
4787 | int r_length; | |
4788 | unsigned int howto_idx; | |
4789 | ||
4790 | if (bfd_header_big_endian (input_bfd)) | |
4791 | { | |
4792 | r_index = ((rel->r_index[0] << 16) | |
4793 | | (rel->r_index[1] << 8) | |
4794 | | rel->r_index[2]); | |
4795 | r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); | |
4796 | r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); | |
4797 | r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); | |
4798 | r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); | |
4799 | r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); | |
4800 | r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) | |
4801 | >> RELOC_STD_BITS_LENGTH_SH_BIG); | |
4802 | } | |
4803 | else | |
4804 | { | |
4805 | r_index = ((rel->r_index[2] << 16) | |
4806 | | (rel->r_index[1] << 8) | |
4807 | | rel->r_index[0]); | |
4808 | r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); | |
4809 | r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); | |
4810 | r_baserel = (0 != (rel->r_type[0] | |
4811 | & RELOC_STD_BITS_BASEREL_LITTLE)); | |
4812 | r_jmptable= (0 != (rel->r_type[0] | |
4813 | & RELOC_STD_BITS_JMPTABLE_LITTLE)); | |
4814 | r_relative= (0 != (rel->r_type[0] | |
4815 | & RELOC_STD_BITS_RELATIVE_LITTLE)); | |
4816 | r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) | |
4817 | >> RELOC_STD_BITS_LENGTH_SH_LITTLE); | |
4818 | } | |
4819 | ||
4820 | howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel | |
4821 | + 16 * r_jmptable + 32 * r_relative); | |
4822 | BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std)); | |
4823 | howto = howto_table_std + howto_idx; | |
4824 | } | |
4825 | #endif | |
4826 | ||
4827 | if (relocateable) | |
4828 | { | |
4829 | /* We are generating a relocateable output file, and must | |
4830 | modify the reloc accordingly. */ | |
4831 | if (r_extern) | |
4832 | { | |
4833 | /* If we know the symbol this relocation is against, | |
4834 | convert it into a relocation against a section. This | |
4835 | is what the native linker does. */ | |
4836 | h = sym_hashes[r_index]; | |
4837 | if (h != (struct aout_link_hash_entry *) NULL | |
4838 | && (h->root.type == bfd_link_hash_defined | |
4839 | || h->root.type == bfd_link_hash_defweak)) | |
4840 | { | |
4841 | asection *output_section; | |
4842 | ||
4843 | /* Change the r_extern value. */ | |
4844 | if (bfd_header_big_endian (output_bfd)) | |
4845 | rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG; | |
4846 | else | |
4847 | rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE; | |
4848 | ||
4849 | /* Compute a new r_index. */ | |
4850 | output_section = h->root.u.def.section->output_section; | |
4851 | if (output_section == obj_textsec (output_bfd)) | |
4852 | r_index = N_TEXT; | |
4853 | else if (output_section == obj_datasec (output_bfd)) | |
4854 | r_index = N_DATA; | |
4855 | else if (output_section == obj_bsssec (output_bfd)) | |
4856 | r_index = N_BSS; | |
4857 | else | |
4858 | r_index = N_ABS; | |
4859 | ||
4860 | /* Add the symbol value and the section VMA to the | |
4861 | addend stored in the contents. */ | |
4862 | relocation = (h->root.u.def.value | |
4863 | + output_section->vma | |
4864 | + h->root.u.def.section->output_offset); | |
4865 | } | |
4866 | else | |
4867 | { | |
4868 | /* We must change r_index according to the symbol | |
4869 | map. */ | |
4870 | r_index = symbol_map[r_index]; | |
4871 | ||
4872 | if (r_index == -1) | |
4873 | { | |
4874 | if (h != NULL) | |
4875 | { | |
4876 | /* We decided to strip this symbol, but it | |
4877 | turns out that we can't. Note that we | |
4878 | lose the other and desc information here. | |
4879 | I don't think that will ever matter for a | |
4880 | global symbol. */ | |
4881 | if (h->indx < 0) | |
4882 | { | |
4883 | h->indx = -2; | |
4884 | h->written = false; | |
4885 | if (! aout_link_write_other_symbol (h, | |
4886 | (PTR) finfo)) | |
4887 | return false; | |
4888 | } | |
4889 | r_index = h->indx; | |
4890 | } | |
4891 | else | |
4892 | { | |
4893 | const char *name; | |
4894 | ||
4895 | name = strings + GET_WORD (input_bfd, | |
4896 | syms[r_index].e_strx); | |
4897 | if (! ((*finfo->info->callbacks->unattached_reloc) | |
4898 | (finfo->info, name, input_bfd, input_section, | |
4899 | r_addr))) | |
4900 | return false; | |
4901 | r_index = 0; | |
4902 | } | |
4903 | } | |
4904 | ||
4905 | relocation = 0; | |
4906 | } | |
4907 | ||
4908 | /* Write out the new r_index value. */ | |
4909 | if (bfd_header_big_endian (output_bfd)) | |
4910 | { | |
4911 | rel->r_index[0] = r_index >> 16; | |
4912 | rel->r_index[1] = r_index >> 8; | |
4913 | rel->r_index[2] = r_index; | |
4914 | } | |
4915 | else | |
4916 | { | |
4917 | rel->r_index[2] = r_index >> 16; | |
4918 | rel->r_index[1] = r_index >> 8; | |
4919 | rel->r_index[0] = r_index; | |
4920 | } | |
4921 | } | |
4922 | else | |
4923 | { | |
4924 | asection *section; | |
4925 | ||
4926 | /* This is a relocation against a section. We must | |
4927 | adjust by the amount that the section moved. */ | |
4928 | section = aout_reloc_index_to_section (input_bfd, r_index); | |
4929 | relocation = (section->output_section->vma | |
4930 | + section->output_offset | |
4931 | - section->vma); | |
4932 | } | |
4933 | ||
4934 | /* Change the address of the relocation. */ | |
4935 | PUT_WORD (output_bfd, | |
4936 | r_addr + input_section->output_offset, | |
4937 | rel->r_address); | |
4938 | ||
4939 | /* Adjust a PC relative relocation by removing the reference | |
4940 | to the original address in the section and including the | |
4941 | reference to the new address. */ | |
4942 | if (r_pcrel) | |
4943 | relocation -= (input_section->output_section->vma | |
4944 | + input_section->output_offset | |
4945 | - input_section->vma); | |
4946 | ||
4947 | #ifdef MY_relocatable_reloc | |
4948 | MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr); | |
4949 | #endif | |
4950 | ||
4951 | if (relocation == 0) | |
4952 | r = bfd_reloc_ok; | |
4953 | else | |
4954 | r = MY_relocate_contents (howto, | |
4955 | input_bfd, relocation, | |
4956 | contents + r_addr); | |
4957 | } | |
4958 | else | |
4959 | { | |
4960 | boolean hundef; | |
4961 | ||
4962 | /* We are generating an executable, and must do a full | |
4963 | relocation. */ | |
4964 | hundef = false; | |
4965 | ||
4966 | if (r_extern) | |
4967 | { | |
4968 | h = sym_hashes[r_index]; | |
4969 | ||
4970 | if (h != (struct aout_link_hash_entry *) NULL | |
4971 | && (h->root.type == bfd_link_hash_defined | |
4972 | || h->root.type == bfd_link_hash_defweak)) | |
4973 | { | |
4974 | relocation = (h->root.u.def.value | |
4975 | + h->root.u.def.section->output_section->vma | |
4976 | + h->root.u.def.section->output_offset); | |
4977 | } | |
4978 | else if (h != (struct aout_link_hash_entry *) NULL | |
4979 | && h->root.type == bfd_link_hash_undefweak) | |
4980 | relocation = 0; | |
4981 | else | |
4982 | { | |
4983 | hundef = true; | |
4984 | relocation = 0; | |
4985 | } | |
4986 | } | |
4987 | else | |
4988 | { | |
4989 | asection *section; | |
4990 | ||
4991 | section = aout_reloc_index_to_section (input_bfd, r_index); | |
4992 | relocation = (section->output_section->vma | |
4993 | + section->output_offset | |
4994 | - section->vma); | |
4995 | if (r_pcrel) | |
4996 | relocation += input_section->vma; | |
4997 | } | |
4998 | ||
4999 | if (check_dynamic_reloc != NULL) | |
5000 | { | |
5001 | boolean skip; | |
5002 | ||
5003 | if (! ((*check_dynamic_reloc) | |
5004 | (finfo->info, input_bfd, input_section, h, | |
5005 | (PTR) rel, contents, &skip, &relocation))) | |
5006 | return false; | |
5007 | if (skip) | |
5008 | continue; | |
5009 | } | |
5010 | ||
5011 | /* Now warn if a global symbol is undefined. We could not | |
5012 | do this earlier, because check_dynamic_reloc might want | |
5013 | to skip this reloc. */ | |
5014 | if (hundef && ! finfo->info->shared && ! r_baserel) | |
5015 | { | |
5016 | const char *name; | |
5017 | ||
5018 | if (h != NULL) | |
5019 | name = h->root.root.string; | |
5020 | else | |
5021 | name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); | |
5022 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
5023 | (finfo->info, name, input_bfd, input_section, r_addr))) | |
5024 | return false; | |
5025 | } | |
5026 | ||
5027 | r = MY_final_link_relocate (howto, | |
5028 | input_bfd, input_section, | |
5029 | contents, r_addr, relocation, | |
5030 | (bfd_vma) 0); | |
5031 | } | |
5032 | ||
5033 | if (r != bfd_reloc_ok) | |
5034 | { | |
5035 | switch (r) | |
5036 | { | |
5037 | default: | |
5038 | case bfd_reloc_outofrange: | |
5039 | abort (); | |
5040 | case bfd_reloc_overflow: | |
5041 | { | |
5042 | const char *name; | |
5043 | ||
5044 | if (h != NULL) | |
5045 | name = h->root.root.string; | |
5046 | else if (r_extern) | |
5047 | name = strings + GET_WORD (input_bfd, | |
5048 | syms[r_index].e_strx); | |
5049 | else | |
5050 | { | |
5051 | asection *s; | |
5052 | ||
5053 | s = aout_reloc_index_to_section (input_bfd, r_index); | |
5054 | name = bfd_section_name (input_bfd, s); | |
5055 | } | |
5056 | if (! ((*finfo->info->callbacks->reloc_overflow) | |
5057 | (finfo->info, name, howto->name, | |
5058 | (bfd_vma) 0, input_bfd, input_section, r_addr))) | |
5059 | return false; | |
5060 | } | |
5061 | break; | |
5062 | } | |
5063 | } | |
5064 | } | |
5065 | ||
5066 | return true; | |
5067 | } | |
5068 | ||
5069 | /* Relocate an a.out section using extended a.out relocs. */ | |
5070 | ||
5071 | static boolean | |
5072 | aout_link_input_section_ext (finfo, input_bfd, input_section, relocs, | |
5073 | rel_size, contents) | |
5074 | struct aout_final_link_info *finfo; | |
5075 | bfd *input_bfd; | |
5076 | asection *input_section; | |
5077 | struct reloc_ext_external *relocs; | |
5078 | bfd_size_type rel_size; | |
5079 | bfd_byte *contents; | |
5080 | { | |
5081 | boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *, | |
5082 | bfd *, asection *, | |
5083 | struct aout_link_hash_entry *, | |
5084 | PTR, bfd_byte *, boolean *, | |
5085 | bfd_vma *)); | |
5086 | bfd *output_bfd; | |
5087 | boolean relocateable; | |
5088 | struct external_nlist *syms; | |
5089 | char *strings; | |
5090 | struct aout_link_hash_entry **sym_hashes; | |
5091 | int *symbol_map; | |
5092 | bfd_size_type reloc_count; | |
5093 | register struct reloc_ext_external *rel; | |
5094 | struct reloc_ext_external *rel_end; | |
5095 | ||
5096 | output_bfd = finfo->output_bfd; | |
5097 | check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; | |
5098 | ||
5099 | BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE); | |
5100 | BFD_ASSERT (input_bfd->xvec->header_byteorder | |
5101 | == output_bfd->xvec->header_byteorder); | |
5102 | ||
5103 | relocateable = finfo->info->relocateable; | |
5104 | syms = obj_aout_external_syms (input_bfd); | |
5105 | strings = obj_aout_external_strings (input_bfd); | |
5106 | sym_hashes = obj_aout_sym_hashes (input_bfd); | |
5107 | symbol_map = finfo->symbol_map; | |
5108 | ||
5109 | reloc_count = rel_size / RELOC_EXT_SIZE; | |
5110 | rel = relocs; | |
5111 | rel_end = rel + reloc_count; | |
5112 | for (; rel < rel_end; rel++) | |
5113 | { | |
5114 | bfd_vma r_addr; | |
5115 | int r_index; | |
5116 | int r_extern; | |
5117 | unsigned int r_type; | |
5118 | bfd_vma r_addend; | |
5119 | struct aout_link_hash_entry *h = NULL; | |
5120 | asection *r_section = NULL; | |
5121 | bfd_vma relocation; | |
5122 | ||
5123 | r_addr = GET_SWORD (input_bfd, rel->r_address); | |
5124 | ||
5125 | if (bfd_header_big_endian (input_bfd)) | |
5126 | { | |
5127 | r_index = ((rel->r_index[0] << 16) | |
5128 | | (rel->r_index[1] << 8) | |
5129 | | rel->r_index[2]); | |
5130 | r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); | |
5131 | r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) | |
5132 | >> RELOC_EXT_BITS_TYPE_SH_BIG); | |
5133 | } | |
5134 | else | |
5135 | { | |
5136 | r_index = ((rel->r_index[2] << 16) | |
5137 | | (rel->r_index[1] << 8) | |
5138 | | rel->r_index[0]); | |
5139 | r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); | |
5140 | r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) | |
5141 | >> RELOC_EXT_BITS_TYPE_SH_LITTLE); | |
5142 | } | |
5143 | ||
5144 | r_addend = GET_SWORD (input_bfd, rel->r_addend); | |
5145 | ||
5146 | BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext)); | |
5147 | ||
5148 | if (relocateable) | |
5149 | { | |
5150 | /* We are generating a relocateable output file, and must | |
5151 | modify the reloc accordingly. */ | |
5152 | if (r_extern | |
5153 | || r_type == RELOC_BASE10 | |
5154 | || r_type == RELOC_BASE13 | |
5155 | || r_type == RELOC_BASE22) | |
5156 | { | |
5157 | /* If we know the symbol this relocation is against, | |
5158 | convert it into a relocation against a section. This | |
5159 | is what the native linker does. */ | |
5160 | if (r_type == RELOC_BASE10 | |
5161 | || r_type == RELOC_BASE13 | |
5162 | || r_type == RELOC_BASE22) | |
5163 | h = NULL; | |
5164 | else | |
5165 | h = sym_hashes[r_index]; | |
5166 | if (h != (struct aout_link_hash_entry *) NULL | |
5167 | && (h->root.type == bfd_link_hash_defined | |
5168 | || h->root.type == bfd_link_hash_defweak)) | |
5169 | { | |
5170 | asection *output_section; | |
5171 | ||
5172 | /* Change the r_extern value. */ | |
5173 | if (bfd_header_big_endian (output_bfd)) | |
5174 | rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG; | |
5175 | else | |
5176 | rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE; | |
5177 | ||
5178 | /* Compute a new r_index. */ | |
5179 | output_section = h->root.u.def.section->output_section; | |
5180 | if (output_section == obj_textsec (output_bfd)) | |
5181 | r_index = N_TEXT; | |
5182 | else if (output_section == obj_datasec (output_bfd)) | |
5183 | r_index = N_DATA; | |
5184 | else if (output_section == obj_bsssec (output_bfd)) | |
5185 | r_index = N_BSS; | |
5186 | else | |
5187 | r_index = N_ABS; | |
5188 | ||
5189 | /* Add the symbol value and the section VMA to the | |
5190 | addend. */ | |
5191 | relocation = (h->root.u.def.value | |
5192 | + output_section->vma | |
5193 | + h->root.u.def.section->output_offset); | |
5194 | ||
5195 | /* Now RELOCATION is the VMA of the final | |
5196 | destination. If this is a PC relative reloc, | |
5197 | then ADDEND is the negative of the source VMA. | |
5198 | We want to set ADDEND to the difference between | |
5199 | the destination VMA and the source VMA, which | |
5200 | means we must adjust RELOCATION by the change in | |
5201 | the source VMA. This is done below. */ | |
5202 | } | |
5203 | else | |
5204 | { | |
5205 | /* We must change r_index according to the symbol | |
5206 | map. */ | |
5207 | r_index = symbol_map[r_index]; | |
5208 | ||
5209 | if (r_index == -1) | |
5210 | { | |
5211 | if (h != NULL) | |
5212 | { | |
5213 | /* We decided to strip this symbol, but it | |
5214 | turns out that we can't. Note that we | |
5215 | lose the other and desc information here. | |
5216 | I don't think that will ever matter for a | |
5217 | global symbol. */ | |
5218 | if (h->indx < 0) | |
5219 | { | |
5220 | h->indx = -2; | |
5221 | h->written = false; | |
5222 | if (! aout_link_write_other_symbol (h, | |
5223 | (PTR) finfo)) | |
5224 | return false; | |
5225 | } | |
5226 | r_index = h->indx; | |
5227 | } | |
5228 | else | |
5229 | { | |
5230 | const char *name; | |
5231 | ||
5232 | name = strings + GET_WORD (input_bfd, | |
5233 | syms[r_index].e_strx); | |
5234 | if (! ((*finfo->info->callbacks->unattached_reloc) | |
5235 | (finfo->info, name, input_bfd, input_section, | |
5236 | r_addr))) | |
5237 | return false; | |
5238 | r_index = 0; | |
5239 | } | |
5240 | } | |
5241 | ||
5242 | relocation = 0; | |
5243 | ||
5244 | /* If this is a PC relative reloc, then the addend | |
5245 | is the negative of the source VMA. We must | |
5246 | adjust it by the change in the source VMA. This | |
5247 | is done below. */ | |
5248 | } | |
5249 | ||
5250 | /* Write out the new r_index value. */ | |
5251 | if (bfd_header_big_endian (output_bfd)) | |
5252 | { | |
5253 | rel->r_index[0] = r_index >> 16; | |
5254 | rel->r_index[1] = r_index >> 8; | |
5255 | rel->r_index[2] = r_index; | |
5256 | } | |
5257 | else | |
5258 | { | |
5259 | rel->r_index[2] = r_index >> 16; | |
5260 | rel->r_index[1] = r_index >> 8; | |
5261 | rel->r_index[0] = r_index; | |
5262 | } | |
5263 | } | |
5264 | else | |
5265 | { | |
5266 | /* This is a relocation against a section. We must | |
5267 | adjust by the amount that the section moved. */ | |
5268 | r_section = aout_reloc_index_to_section (input_bfd, r_index); | |
5269 | relocation = (r_section->output_section->vma | |
5270 | + r_section->output_offset | |
5271 | - r_section->vma); | |
5272 | ||
5273 | /* If this is a PC relative reloc, then the addend is | |
5274 | the difference in VMA between the destination and the | |
5275 | source. We have just adjusted for the change in VMA | |
5276 | of the destination, so we must also adjust by the | |
5277 | change in VMA of the source. This is done below. */ | |
5278 | } | |
5279 | ||
5280 | /* As described above, we must always adjust a PC relative | |
5281 | reloc by the change in VMA of the source. However, if | |
5282 | pcrel_offset is set, then the addend does not include the | |
5283 | location within the section, in which case we don't need | |
5284 | to adjust anything. */ | |
5285 | if (howto_table_ext[r_type].pc_relative | |
5286 | && ! howto_table_ext[r_type].pcrel_offset) | |
5287 | relocation -= (input_section->output_section->vma | |
5288 | + input_section->output_offset | |
5289 | - input_section->vma); | |
5290 | ||
5291 | /* Change the addend if necessary. */ | |
5292 | if (relocation != 0) | |
5293 | PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend); | |
5294 | ||
5295 | /* Change the address of the relocation. */ | |
5296 | PUT_WORD (output_bfd, | |
5297 | r_addr + input_section->output_offset, | |
5298 | rel->r_address); | |
5299 | } | |
5300 | else | |
5301 | { | |
5302 | boolean hundef; | |
5303 | bfd_reloc_status_type r; | |
5304 | ||
5305 | /* We are generating an executable, and must do a full | |
5306 | relocation. */ | |
5307 | hundef = false; | |
5308 | ||
5309 | if (r_extern) | |
5310 | { | |
5311 | h = sym_hashes[r_index]; | |
5312 | ||
5313 | if (h != (struct aout_link_hash_entry *) NULL | |
5314 | && (h->root.type == bfd_link_hash_defined | |
5315 | || h->root.type == bfd_link_hash_defweak)) | |
5316 | { | |
5317 | relocation = (h->root.u.def.value | |
5318 | + h->root.u.def.section->output_section->vma | |
5319 | + h->root.u.def.section->output_offset); | |
5320 | } | |
5321 | else if (h != (struct aout_link_hash_entry *) NULL | |
5322 | && h->root.type == bfd_link_hash_undefweak) | |
5323 | relocation = 0; | |
5324 | else | |
5325 | { | |
5326 | hundef = true; | |
5327 | relocation = 0; | |
5328 | } | |
5329 | } | |
5330 | else if (r_type == RELOC_BASE10 | |
5331 | || r_type == RELOC_BASE13 | |
5332 | || r_type == RELOC_BASE22) | |
5333 | { | |
5334 | struct external_nlist *sym; | |
5335 | int type; | |
5336 | ||
5337 | /* For base relative relocs, r_index is always an index | |
5338 | into the symbol table, even if r_extern is 0. */ | |
5339 | sym = syms + r_index; | |
5340 | type = bfd_h_get_8 (input_bfd, sym->e_type); | |
5341 | if ((type & N_TYPE) == N_TEXT | |
5342 | || type == N_WEAKT) | |
5343 | r_section = obj_textsec (input_bfd); | |
5344 | else if ((type & N_TYPE) == N_DATA | |
5345 | || type == N_WEAKD) | |
5346 | r_section = obj_datasec (input_bfd); | |
5347 | else if ((type & N_TYPE) == N_BSS | |
5348 | || type == N_WEAKB) | |
5349 | r_section = obj_bsssec (input_bfd); | |
5350 | else if ((type & N_TYPE) == N_ABS | |
5351 | || type == N_WEAKA) | |
5352 | r_section = bfd_abs_section_ptr; | |
5353 | else | |
5354 | abort (); | |
5355 | relocation = (r_section->output_section->vma | |
5356 | + r_section->output_offset | |
5357 | + (GET_WORD (input_bfd, sym->e_value) | |
5358 | - r_section->vma)); | |
5359 | } | |
5360 | else | |
5361 | { | |
5362 | r_section = aout_reloc_index_to_section (input_bfd, r_index); | |
5363 | ||
5364 | /* If this is a PC relative reloc, then R_ADDEND is the | |
5365 | difference between the two vmas, or | |
5366 | old_dest_sec + old_dest_off - (old_src_sec + old_src_off) | |
5367 | where | |
5368 | old_dest_sec == section->vma | |
5369 | and | |
5370 | old_src_sec == input_section->vma | |
5371 | and | |
5372 | old_src_off == r_addr | |
5373 | ||
5374 | _bfd_final_link_relocate expects RELOCATION + | |
5375 | R_ADDEND to be the VMA of the destination minus | |
5376 | r_addr (the minus r_addr is because this relocation | |
5377 | is not pcrel_offset, which is a bit confusing and | |
5378 | should, perhaps, be changed), or | |
5379 | new_dest_sec | |
5380 | where | |
5381 | new_dest_sec == output_section->vma + output_offset | |
5382 | We arrange for this to happen by setting RELOCATION to | |
5383 | new_dest_sec + old_src_sec - old_dest_sec | |
5384 | ||
5385 | If this is not a PC relative reloc, then R_ADDEND is | |
5386 | simply the VMA of the destination, so we set | |
5387 | RELOCATION to the change in the destination VMA, or | |
5388 | new_dest_sec - old_dest_sec | |
5389 | */ | |
5390 | relocation = (r_section->output_section->vma | |
5391 | + r_section->output_offset | |
5392 | - r_section->vma); | |
5393 | if (howto_table_ext[r_type].pc_relative) | |
5394 | relocation += input_section->vma; | |
5395 | } | |
5396 | ||
5397 | if (check_dynamic_reloc != NULL) | |
5398 | { | |
5399 | boolean skip; | |
5400 | ||
5401 | if (! ((*check_dynamic_reloc) | |
5402 | (finfo->info, input_bfd, input_section, h, | |
5403 | (PTR) rel, contents, &skip, &relocation))) | |
5404 | return false; | |
5405 | if (skip) | |
5406 | continue; | |
5407 | } | |
5408 | ||
5409 | /* Now warn if a global symbol is undefined. We could not | |
5410 | do this earlier, because check_dynamic_reloc might want | |
5411 | to skip this reloc. */ | |
5412 | if (hundef | |
5413 | && ! finfo->info->shared | |
5414 | && r_type != RELOC_BASE10 | |
5415 | && r_type != RELOC_BASE13 | |
5416 | && r_type != RELOC_BASE22) | |
5417 | { | |
5418 | const char *name; | |
5419 | ||
5420 | if (h != NULL) | |
5421 | name = h->root.root.string; | |
5422 | else | |
5423 | name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); | |
5424 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
5425 | (finfo->info, name, input_bfd, input_section, r_addr))) | |
5426 | return false; | |
5427 | } | |
5428 | ||
5429 | if (r_type != RELOC_SPARC_REV32) | |
5430 | r = MY_final_link_relocate (howto_table_ext + r_type, | |
5431 | input_bfd, input_section, | |
5432 | contents, r_addr, relocation, | |
5433 | r_addend); | |
5434 | else | |
5435 | { | |
5436 | bfd_vma x; | |
5437 | ||
5438 | x = bfd_get_32 (input_bfd, contents + r_addr); | |
5439 | x = x + relocation + r_addend; | |
5440 | bfd_putl32 (/*input_bfd,*/ x, contents + r_addr); | |
5441 | r = bfd_reloc_ok; | |
5442 | } | |
5443 | ||
5444 | if (r != bfd_reloc_ok) | |
5445 | { | |
5446 | switch (r) | |
5447 | { | |
5448 | default: | |
5449 | case bfd_reloc_outofrange: | |
5450 | abort (); | |
5451 | case bfd_reloc_overflow: | |
5452 | { | |
5453 | const char *name; | |
5454 | ||
5455 | if (h != NULL) | |
5456 | name = h->root.root.string; | |
5457 | else if (r_extern | |
5458 | || r_type == RELOC_BASE10 | |
5459 | || r_type == RELOC_BASE13 | |
5460 | || r_type == RELOC_BASE22) | |
5461 | name = strings + GET_WORD (input_bfd, | |
5462 | syms[r_index].e_strx); | |
5463 | else | |
5464 | { | |
5465 | asection *s; | |
5466 | ||
5467 | s = aout_reloc_index_to_section (input_bfd, r_index); | |
5468 | name = bfd_section_name (input_bfd, s); | |
5469 | } | |
5470 | if (! ((*finfo->info->callbacks->reloc_overflow) | |
5471 | (finfo->info, name, howto_table_ext[r_type].name, | |
5472 | r_addend, input_bfd, input_section, r_addr))) | |
5473 | return false; | |
5474 | } | |
5475 | break; | |
5476 | } | |
5477 | } | |
5478 | } | |
5479 | } | |
5480 | ||
5481 | return true; | |
5482 | } | |
5483 | ||
5484 | /* Handle a link order which is supposed to generate a reloc. */ | |
5485 | ||
5486 | static boolean | |
5487 | aout_link_reloc_link_order (finfo, o, p) | |
5488 | struct aout_final_link_info *finfo; | |
5489 | asection *o; | |
5490 | struct bfd_link_order *p; | |
5491 | { | |
5492 | struct bfd_link_order_reloc *pr; | |
5493 | int r_index; | |
5494 | int r_extern; | |
5495 | reloc_howto_type *howto; | |
5496 | file_ptr *reloff_ptr; | |
5497 | struct reloc_std_external srel; | |
5498 | struct reloc_ext_external erel; | |
5499 | PTR rel_ptr; | |
5500 | ||
5501 | pr = p->u.reloc.p; | |
5502 | ||
5503 | if (p->type == bfd_section_reloc_link_order) | |
5504 | { | |
5505 | r_extern = 0; | |
5506 | if (bfd_is_abs_section (pr->u.section)) | |
5507 | r_index = N_ABS | N_EXT; | |
5508 | else | |
5509 | { | |
5510 | BFD_ASSERT (pr->u.section->owner == finfo->output_bfd); | |
5511 | r_index = pr->u.section->target_index; | |
5512 | } | |
5513 | } | |
5514 | else | |
5515 | { | |
5516 | struct aout_link_hash_entry *h; | |
5517 | ||
5518 | BFD_ASSERT (p->type == bfd_symbol_reloc_link_order); | |
5519 | r_extern = 1; | |
5520 | h = ((struct aout_link_hash_entry *) | |
5521 | bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info, | |
5522 | pr->u.name, false, false, true)); | |
5523 | if (h != (struct aout_link_hash_entry *) NULL | |
5524 | && h->indx >= 0) | |
5525 | r_index = h->indx; | |
5526 | else if (h != NULL) | |
5527 | { | |
5528 | /* We decided to strip this symbol, but it turns out that we | |
5529 | can't. Note that we lose the other and desc information | |
5530 | here. I don't think that will ever matter for a global | |
5531 | symbol. */ | |
5532 | h->indx = -2; | |
5533 | h->written = false; | |
5534 | if (! aout_link_write_other_symbol (h, (PTR) finfo)) | |
5535 | return false; | |
5536 | r_index = h->indx; | |
5537 | } | |
5538 | else | |
5539 | { | |
5540 | if (! ((*finfo->info->callbacks->unattached_reloc) | |
5541 | (finfo->info, pr->u.name, (bfd *) NULL, | |
5542 | (asection *) NULL, (bfd_vma) 0))) | |
5543 | return false; | |
5544 | r_index = 0; | |
5545 | } | |
5546 | } | |
5547 | ||
5548 | howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc); | |
5549 | if (howto == 0) | |
5550 | { | |
5551 | bfd_set_error (bfd_error_bad_value); | |
5552 | return false; | |
5553 | } | |
5554 | ||
5555 | if (o == obj_textsec (finfo->output_bfd)) | |
5556 | reloff_ptr = &finfo->treloff; | |
5557 | else if (o == obj_datasec (finfo->output_bfd)) | |
5558 | reloff_ptr = &finfo->dreloff; | |
5559 | else | |
5560 | abort (); | |
5561 | ||
5562 | if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE) | |
5563 | { | |
5564 | #ifdef MY_put_reloc | |
5565 | MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto, | |
5566 | &srel); | |
5567 | #else | |
5568 | { | |
5569 | int r_pcrel; | |
5570 | int r_baserel; | |
5571 | int r_jmptable; | |
5572 | int r_relative; | |
5573 | int r_length; | |
5574 | ||
5575 | r_pcrel = howto->pc_relative; | |
5576 | r_baserel = (howto->type & 8) != 0; | |
5577 | r_jmptable = (howto->type & 16) != 0; | |
5578 | r_relative = (howto->type & 32) != 0; | |
5579 | r_length = howto->size; | |
5580 | ||
5581 | PUT_WORD (finfo->output_bfd, p->offset, srel.r_address); | |
5582 | if (bfd_header_big_endian (finfo->output_bfd)) | |
5583 | { | |
5584 | srel.r_index[0] = r_index >> 16; | |
5585 | srel.r_index[1] = r_index >> 8; | |
5586 | srel.r_index[2] = r_index; | |
5587 | srel.r_type[0] = | |
5588 | ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) | |
5589 | | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) | |
5590 | | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) | |
5591 | | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) | |
5592 | | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) | |
5593 | | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); | |
5594 | } | |
5595 | else | |
5596 | { | |
5597 | srel.r_index[2] = r_index >> 16; | |
5598 | srel.r_index[1] = r_index >> 8; | |
5599 | srel.r_index[0] = r_index; | |
5600 | srel.r_type[0] = | |
5601 | ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) | |
5602 | | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) | |
5603 | | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) | |
5604 | | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) | |
5605 | | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) | |
5606 | | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); | |
5607 | } | |
5608 | } | |
5609 | #endif | |
5610 | rel_ptr = (PTR) &srel; | |
5611 | ||
5612 | /* We have to write the addend into the object file, since | |
5613 | standard a.out relocs are in place. It would be more | |
5614 | reliable if we had the current contents of the file here, | |
5615 | rather than assuming zeroes, but we can't read the file since | |
5616 | it was opened using bfd_openw. */ | |
5617 | if (pr->addend != 0) | |
5618 | { | |
5619 | bfd_size_type size; | |
5620 | bfd_reloc_status_type r; | |
5621 | bfd_byte *buf; | |
5622 | boolean ok; | |
5623 | ||
5624 | size = bfd_get_reloc_size (howto); | |
5625 | buf = (bfd_byte *) bfd_zmalloc (size); | |
5626 | if (buf == (bfd_byte *) NULL) | |
5627 | return false; | |
5628 | r = MY_relocate_contents (howto, finfo->output_bfd, | |
5629 | pr->addend, buf); | |
5630 | switch (r) | |
5631 | { | |
5632 | case bfd_reloc_ok: | |
5633 | break; | |
5634 | default: | |
5635 | case bfd_reloc_outofrange: | |
5636 | abort (); | |
5637 | case bfd_reloc_overflow: | |
5638 | if (! ((*finfo->info->callbacks->reloc_overflow) | |
5639 | (finfo->info, | |
5640 | (p->type == bfd_section_reloc_link_order | |
5641 | ? bfd_section_name (finfo->output_bfd, | |
5642 | pr->u.section) | |
5643 | : pr->u.name), | |
5644 | howto->name, pr->addend, (bfd *) NULL, | |
5645 | (asection *) NULL, (bfd_vma) 0))) | |
5646 | { | |
5647 | free (buf); | |
5648 | return false; | |
5649 | } | |
5650 | break; | |
5651 | } | |
5652 | ok = bfd_set_section_contents (finfo->output_bfd, o, | |
5653 | (PTR) buf, | |
5654 | (file_ptr) p->offset, | |
5655 | size); | |
5656 | free (buf); | |
5657 | if (! ok) | |
5658 | return false; | |
5659 | } | |
5660 | } | |
5661 | else | |
5662 | { | |
5663 | PUT_WORD (finfo->output_bfd, p->offset, erel.r_address); | |
5664 | ||
5665 | if (bfd_header_big_endian (finfo->output_bfd)) | |
5666 | { | |
5667 | erel.r_index[0] = r_index >> 16; | |
5668 | erel.r_index[1] = r_index >> 8; | |
5669 | erel.r_index[2] = r_index; | |
5670 | erel.r_type[0] = | |
5671 | ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) | |
5672 | | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG)); | |
5673 | } | |
5674 | else | |
5675 | { | |
5676 | erel.r_index[2] = r_index >> 16; | |
5677 | erel.r_index[1] = r_index >> 8; | |
5678 | erel.r_index[0] = r_index; | |
5679 | erel.r_type[0] = | |
5680 | (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) | |
5681 | | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE); | |
5682 | } | |
5683 | ||
5684 | PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend); | |
5685 | ||
5686 | rel_ptr = (PTR) &erel; | |
5687 | } | |
5688 | ||
5689 | if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0 | |
5690 | || (bfd_write (rel_ptr, (bfd_size_type) 1, | |
5691 | obj_reloc_entry_size (finfo->output_bfd), | |
5692 | finfo->output_bfd) | |
5693 | != obj_reloc_entry_size (finfo->output_bfd))) | |
5694 | return false; | |
5695 | ||
5696 | *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd); | |
5697 | ||
5698 | /* Assert that the relocs have not run into the symbols, and that n | |
5699 | the text relocs have not run into the data relocs. */ | |
5700 | BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) | |
5701 | && (reloff_ptr != &finfo->treloff | |
5702 | || (*reloff_ptr | |
5703 | <= obj_datasec (finfo->output_bfd)->rel_filepos))); | |
5704 | ||
5705 | return true; | |
5706 | } |