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252b5132 | 1 | /* BFD semi-generic back-end for a.out binaries. |
7898deda NC |
2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, |
3 | 2001 | |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | Written by Cygnus Support. | |
6 | ||
7 | This file is part of BFD, the Binary File Descriptor library. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | /* | |
24 | SECTION | |
25 | a.out backends | |
26 | ||
252b5132 RH |
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 | ||
1642229e HPN |
168 | #ifndef MY_swap_ext_reloc_in |
169 | #define MY_swap_ext_reloc_in NAME(aout,swap_ext_reloc_in) | |
170 | #endif | |
171 | ||
252b5132 RH |
172 | #ifndef MY_swap_std_reloc_out |
173 | #define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out) | |
174 | #endif | |
175 | ||
1642229e HPN |
176 | #ifndef MY_swap_ext_reloc_out |
177 | #define MY_swap_ext_reloc_out NAME(aout,swap_ext_reloc_out) | |
178 | #endif | |
179 | ||
252b5132 RH |
180 | #ifndef MY_final_link_relocate |
181 | #define MY_final_link_relocate _bfd_final_link_relocate | |
182 | #endif | |
183 | ||
184 | #ifndef MY_relocate_contents | |
185 | #define MY_relocate_contents _bfd_relocate_contents | |
186 | #endif | |
187 | ||
188 | #define howto_table_ext NAME(aout,ext_howto_table) | |
189 | #define howto_table_std NAME(aout,std_howto_table) | |
190 | ||
191 | reloc_howto_type howto_table_ext[] = | |
192 | { | |
193 | /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ | |
194 | HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false), | |
195 | HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false), | |
196 | HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false), | |
197 | HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false), | |
198 | HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false), | |
199 | HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false), | |
200 | HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false), | |
201 | HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false), | |
202 | HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false), | |
203 | HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false), | |
204 | HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false), | |
205 | HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false), | |
206 | HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false), | |
207 | HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false), | |
208 | HOWTO(RELOC_BASE10, 0, 2, 10, false, 0, complain_overflow_dont,0,"BASE10", false, 0,0x000003ff, false), | |
209 | HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_signed,0,"BASE13", false, 0,0x00001fff, false), | |
210 | HOWTO(RELOC_BASE22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x003fffff, false), | |
211 | HOWTO(RELOC_PC10, 0, 2, 10, true, 0, complain_overflow_dont,0,"PC10", false, 0,0x000003ff, true), | |
212 | HOWTO(RELOC_PC22, 10, 2, 22, true, 0, complain_overflow_signed,0,"PC22", false, 0,0x003fffff, true), | |
213 | HOWTO(RELOC_JMP_TBL,2, 2, 30, true, 0, complain_overflow_signed,0,"JMP_TBL", false, 0,0x3fffffff, false), | |
214 | HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false), | |
215 | HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false), | |
216 | HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false), | |
217 | HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false), | |
218 | HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true), | |
219 | HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true), | |
220 | #define RELOC_SPARC_REV32 RELOC_WDISP19 | |
221 | HOWTO(RELOC_SPARC_REV32, 0, 2, 32, false, 0, complain_overflow_dont,0,"R_SPARC_REV32", false, 0,0xffffffff, false), | |
222 | }; | |
223 | ||
224 | /* Convert standard reloc records to "arelent" format (incl byte swap). */ | |
225 | ||
226 | reloc_howto_type howto_table_std[] = { | |
227 | /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */ | |
228 | HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false), | |
229 | HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false), | |
230 | HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false), | |
231 | HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false), | |
232 | HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false), | |
233 | HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false), | |
234 | HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false), | |
235 | HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false), | |
236 | HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"GOT_REL", false, 0,0x00000000, false), | |
237 | HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false), | |
238 | HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false), | |
5f771d47 ILT |
239 | EMPTY_HOWTO (-1), |
240 | EMPTY_HOWTO (-1), | |
241 | EMPTY_HOWTO (-1), | |
242 | EMPTY_HOWTO (-1), | |
243 | EMPTY_HOWTO (-1), | |
252b5132 | 244 | HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false), |
5f771d47 ILT |
245 | EMPTY_HOWTO (-1), |
246 | EMPTY_HOWTO (-1), | |
247 | EMPTY_HOWTO (-1), | |
248 | EMPTY_HOWTO (-1), | |
249 | EMPTY_HOWTO (-1), | |
250 | EMPTY_HOWTO (-1), | |
251 | EMPTY_HOWTO (-1), | |
252 | EMPTY_HOWTO (-1), | |
253 | EMPTY_HOWTO (-1), | |
254 | EMPTY_HOWTO (-1), | |
255 | EMPTY_HOWTO (-1), | |
256 | EMPTY_HOWTO (-1), | |
257 | EMPTY_HOWTO (-1), | |
258 | EMPTY_HOWTO (-1), | |
259 | EMPTY_HOWTO (-1), | |
252b5132 | 260 | HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false), |
5f771d47 ILT |
261 | EMPTY_HOWTO (-1), |
262 | EMPTY_HOWTO (-1), | |
263 | EMPTY_HOWTO (-1), | |
264 | EMPTY_HOWTO (-1), | |
265 | EMPTY_HOWTO (-1), | |
266 | EMPTY_HOWTO (-1), | |
267 | EMPTY_HOWTO (-1), | |
252b5132 RH |
268 | HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false), |
269 | }; | |
270 | ||
beb0d161 | 271 | #define TABLE_SIZE(TABLE) (sizeof (TABLE)/sizeof (TABLE[0])) |
252b5132 RH |
272 | |
273 | reloc_howto_type * | |
274 | NAME(aout,reloc_type_lookup) (abfd,code) | |
275 | bfd *abfd; | |
276 | bfd_reloc_code_real_type code; | |
277 | { | |
278 | #define EXT(i,j) case i: return &howto_table_ext[j] | |
279 | #define STD(i,j) case i: return &howto_table_std[j] | |
280 | int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE; | |
281 | if (code == BFD_RELOC_CTOR) | |
282 | switch (bfd_get_arch_info (abfd)->bits_per_address) | |
283 | { | |
284 | case 32: | |
285 | code = BFD_RELOC_32; | |
286 | break; | |
287 | case 64: | |
288 | code = BFD_RELOC_64; | |
289 | break; | |
290 | } | |
291 | if (ext) | |
292 | switch (code) | |
293 | { | |
1642229e HPN |
294 | EXT (BFD_RELOC_8, 0); |
295 | EXT (BFD_RELOC_16, 1); | |
252b5132 RH |
296 | EXT (BFD_RELOC_32, 2); |
297 | EXT (BFD_RELOC_HI22, 8); | |
298 | EXT (BFD_RELOC_LO10, 11); | |
299 | EXT (BFD_RELOC_32_PCREL_S2, 6); | |
300 | EXT (BFD_RELOC_SPARC_WDISP22, 7); | |
301 | EXT (BFD_RELOC_SPARC13, 10); | |
302 | EXT (BFD_RELOC_SPARC_GOT10, 14); | |
303 | EXT (BFD_RELOC_SPARC_BASE13, 15); | |
304 | EXT (BFD_RELOC_SPARC_GOT13, 15); | |
305 | EXT (BFD_RELOC_SPARC_GOT22, 16); | |
306 | EXT (BFD_RELOC_SPARC_PC10, 17); | |
307 | EXT (BFD_RELOC_SPARC_PC22, 18); | |
308 | EXT (BFD_RELOC_SPARC_WPLT30, 19); | |
309 | EXT (BFD_RELOC_SPARC_REV32, 26); | |
310 | default: return (reloc_howto_type *) NULL; | |
311 | } | |
312 | else | |
313 | /* std relocs */ | |
314 | switch (code) | |
315 | { | |
316 | STD (BFD_RELOC_16, 1); | |
317 | STD (BFD_RELOC_32, 2); | |
318 | STD (BFD_RELOC_8_PCREL, 4); | |
319 | STD (BFD_RELOC_16_PCREL, 5); | |
320 | STD (BFD_RELOC_32_PCREL, 6); | |
321 | STD (BFD_RELOC_16_BASEREL, 9); | |
322 | STD (BFD_RELOC_32_BASEREL, 10); | |
323 | default: return (reloc_howto_type *) NULL; | |
324 | } | |
325 | } | |
326 | ||
327 | /* | |
328 | SUBSECTION | |
329 | Internal entry points | |
330 | ||
331 | DESCRIPTION | |
332 | @file{aoutx.h} exports several routines for accessing the | |
333 | contents of an a.out file, which are gathered and exported in | |
334 | turn by various format specific files (eg sunos.c). | |
335 | ||
336 | */ | |
337 | ||
338 | /* | |
339 | FUNCTION | |
340 | aout_@var{size}_swap_exec_header_in | |
341 | ||
342 | SYNOPSIS | |
343 | void aout_@var{size}_swap_exec_header_in, | |
344 | (bfd *abfd, | |
345 | struct external_exec *raw_bytes, | |
346 | struct internal_exec *execp); | |
347 | ||
348 | DESCRIPTION | |
349 | Swap the information in an executable header @var{raw_bytes} taken | |
350 | from a raw byte stream memory image into the internal exec header | |
351 | structure @var{execp}. | |
352 | */ | |
353 | ||
354 | #ifndef NAME_swap_exec_header_in | |
355 | void | |
356 | NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp) | |
357 | bfd *abfd; | |
358 | struct external_exec *raw_bytes; | |
359 | struct internal_exec *execp; | |
360 | { | |
361 | struct external_exec *bytes = (struct external_exec *)raw_bytes; | |
362 | ||
363 | /* The internal_exec structure has some fields that are unused in this | |
364 | configuration (IE for i960), so ensure that all such uninitialized | |
365 | fields are zero'd out. There are places where two of these structs | |
0ef5a5bd | 366 | are memcmp'd, and thus the contents do matter. */ |
252b5132 RH |
367 | memset ((PTR) execp, 0, sizeof (struct internal_exec)); |
368 | /* Now fill in fields in the execp, from the bytes in the raw data. */ | |
369 | execp->a_info = bfd_h_get_32 (abfd, bytes->e_info); | |
370 | execp->a_text = GET_WORD (abfd, bytes->e_text); | |
371 | execp->a_data = GET_WORD (abfd, bytes->e_data); | |
372 | execp->a_bss = GET_WORD (abfd, bytes->e_bss); | |
373 | execp->a_syms = GET_WORD (abfd, bytes->e_syms); | |
374 | execp->a_entry = GET_WORD (abfd, bytes->e_entry); | |
375 | execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); | |
376 | execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); | |
377 | } | |
378 | #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in) | |
379 | #endif | |
380 | ||
381 | /* | |
382 | FUNCTION | |
383 | aout_@var{size}_swap_exec_header_out | |
384 | ||
385 | SYNOPSIS | |
386 | void aout_@var{size}_swap_exec_header_out | |
387 | (bfd *abfd, | |
388 | struct internal_exec *execp, | |
389 | struct external_exec *raw_bytes); | |
390 | ||
391 | DESCRIPTION | |
392 | Swap the information in an internal exec header structure | |
393 | @var{execp} into the buffer @var{raw_bytes} ready for writing to disk. | |
394 | */ | |
395 | void | |
396 | NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes) | |
397 | bfd *abfd; | |
398 | struct internal_exec *execp; | |
399 | struct external_exec *raw_bytes; | |
400 | { | |
401 | struct external_exec *bytes = (struct external_exec *)raw_bytes; | |
402 | ||
0ef5a5bd | 403 | /* Now fill in fields in the raw data, from the fields in the exec struct. */ |
252b5132 RH |
404 | bfd_h_put_32 (abfd, execp->a_info , bytes->e_info); |
405 | PUT_WORD (abfd, execp->a_text , bytes->e_text); | |
406 | PUT_WORD (abfd, execp->a_data , bytes->e_data); | |
407 | PUT_WORD (abfd, execp->a_bss , bytes->e_bss); | |
408 | PUT_WORD (abfd, execp->a_syms , bytes->e_syms); | |
409 | PUT_WORD (abfd, execp->a_entry , bytes->e_entry); | |
410 | PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); | |
411 | PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); | |
412 | } | |
413 | ||
414 | /* Make all the section for an a.out file. */ | |
415 | ||
416 | boolean | |
417 | NAME(aout,make_sections) (abfd) | |
418 | bfd *abfd; | |
419 | { | |
420 | if (obj_textsec (abfd) == (asection *) NULL | |
421 | && bfd_make_section (abfd, ".text") == (asection *) NULL) | |
422 | return false; | |
423 | if (obj_datasec (abfd) == (asection *) NULL | |
424 | && bfd_make_section (abfd, ".data") == (asection *) NULL) | |
425 | return false; | |
426 | if (obj_bsssec (abfd) == (asection *) NULL | |
427 | && bfd_make_section (abfd, ".bss") == (asection *) NULL) | |
428 | return false; | |
429 | return true; | |
430 | } | |
431 | ||
432 | /* | |
433 | FUNCTION | |
434 | aout_@var{size}_some_aout_object_p | |
435 | ||
436 | SYNOPSIS | |
437 | const bfd_target *aout_@var{size}_some_aout_object_p | |
438 | (bfd *abfd, | |
beb0d161 | 439 | const bfd_target *(*callback_to_real_object_p) ()); |
252b5132 RH |
440 | |
441 | DESCRIPTION | |
442 | Some a.out variant thinks that the file open in @var{abfd} | |
443 | checking is an a.out file. Do some more checking, and set up | |
444 | for access if it really is. Call back to the calling | |
445 | environment's "finish up" function just before returning, to | |
446 | handle any last-minute setup. | |
447 | */ | |
448 | ||
449 | const bfd_target * | |
450 | NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p) | |
451 | bfd *abfd; | |
452 | struct internal_exec *execp; | |
453 | const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *)); | |
454 | { | |
455 | struct aout_data_struct *rawptr, *oldrawptr; | |
456 | const bfd_target *result; | |
457 | ||
458 | rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct )); | |
459 | if (rawptr == NULL) | |
460 | return 0; | |
461 | ||
462 | oldrawptr = abfd->tdata.aout_data; | |
463 | abfd->tdata.aout_data = rawptr; | |
464 | ||
465 | /* Copy the contents of the old tdata struct. | |
466 | In particular, we want the subformat, since for hpux it was set in | |
467 | hp300hpux.c:swap_exec_header_in and will be used in | |
468 | hp300hpux.c:callback. */ | |
469 | if (oldrawptr != NULL) | |
470 | *abfd->tdata.aout_data = *oldrawptr; | |
471 | ||
472 | abfd->tdata.aout_data->a.hdr = &rawptr->e; | |
473 | *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */ | |
474 | execp = abfd->tdata.aout_data->a.hdr; | |
475 | ||
476 | /* Set the file flags */ | |
477 | abfd->flags = BFD_NO_FLAGS; | |
478 | if (execp->a_drsize || execp->a_trsize) | |
479 | abfd->flags |= HAS_RELOC; | |
480 | /* Setting of EXEC_P has been deferred to the bottom of this function */ | |
481 | if (execp->a_syms) | |
482 | abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS; | |
483 | if (N_DYNAMIC(*execp)) | |
484 | abfd->flags |= DYNAMIC; | |
485 | ||
486 | if (N_MAGIC (*execp) == ZMAGIC) | |
487 | { | |
488 | abfd->flags |= D_PAGED | WP_TEXT; | |
489 | adata (abfd).magic = z_magic; | |
490 | } | |
491 | else if (N_MAGIC (*execp) == QMAGIC) | |
492 | { | |
493 | abfd->flags |= D_PAGED | WP_TEXT; | |
494 | adata (abfd).magic = z_magic; | |
495 | adata (abfd).subformat = q_magic_format; | |
496 | } | |
497 | else if (N_MAGIC (*execp) == NMAGIC) | |
498 | { | |
499 | abfd->flags |= WP_TEXT; | |
500 | adata (abfd).magic = n_magic; | |
501 | } | |
502 | else if (N_MAGIC (*execp) == OMAGIC | |
503 | || N_MAGIC (*execp) == BMAGIC) | |
504 | adata (abfd).magic = o_magic; | |
505 | else | |
506 | { | |
507 | /* Should have been checked with N_BADMAG before this routine | |
508 | was called. */ | |
509 | abort (); | |
510 | } | |
511 | ||
512 | bfd_get_start_address (abfd) = execp->a_entry; | |
513 | ||
514 | obj_aout_symbols (abfd) = (aout_symbol_type *)NULL; | |
515 | bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist); | |
516 | ||
517 | /* The default relocation entry size is that of traditional V7 Unix. */ | |
518 | obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; | |
519 | ||
0ef5a5bd | 520 | /* The default symbol entry size is that of traditional Unix. */ |
252b5132 RH |
521 | obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE; |
522 | ||
523 | #ifdef USE_MMAP | |
524 | bfd_init_window (&obj_aout_sym_window (abfd)); | |
525 | bfd_init_window (&obj_aout_string_window (abfd)); | |
526 | #endif | |
527 | obj_aout_external_syms (abfd) = NULL; | |
528 | obj_aout_external_strings (abfd) = NULL; | |
529 | obj_aout_sym_hashes (abfd) = NULL; | |
530 | ||
531 | if (! NAME(aout,make_sections) (abfd)) | |
532 | return NULL; | |
533 | ||
534 | obj_datasec (abfd)->_raw_size = execp->a_data; | |
535 | obj_bsssec (abfd)->_raw_size = execp->a_bss; | |
536 | ||
537 | obj_textsec (abfd)->flags = | |
538 | (execp->a_trsize != 0 | |
539 | ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) | |
540 | : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)); | |
541 | obj_datasec (abfd)->flags = | |
542 | (execp->a_drsize != 0 | |
543 | ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) | |
544 | : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)); | |
545 | obj_bsssec (abfd)->flags = SEC_ALLOC; | |
546 | ||
547 | #ifdef THIS_IS_ONLY_DOCUMENTATION | |
548 | /* The common code can't fill in these things because they depend | |
549 | on either the start address of the text segment, the rounding | |
550 | up of virtual addresses between segments, or the starting file | |
551 | position of the text segment -- all of which varies among different | |
552 | versions of a.out. */ | |
553 | ||
554 | /* Call back to the format-dependent code to fill in the rest of the | |
555 | fields and do any further cleanup. Things that should be filled | |
556 | in by the callback: */ | |
557 | ||
558 | struct exec *execp = exec_hdr (abfd); | |
559 | ||
560 | obj_textsec (abfd)->size = N_TXTSIZE(*execp); | |
561 | obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp); | |
562 | /* data and bss are already filled in since they're so standard */ | |
563 | ||
564 | /* The virtual memory addresses of the sections */ | |
565 | obj_textsec (abfd)->vma = N_TXTADDR(*execp); | |
566 | obj_datasec (abfd)->vma = N_DATADDR(*execp); | |
567 | obj_bsssec (abfd)->vma = N_BSSADDR(*execp); | |
568 | ||
569 | /* The file offsets of the sections */ | |
570 | obj_textsec (abfd)->filepos = N_TXTOFF(*execp); | |
571 | obj_datasec (abfd)->filepos = N_DATOFF(*execp); | |
572 | ||
573 | /* The file offsets of the relocation info */ | |
574 | obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp); | |
575 | obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp); | |
576 | ||
577 | /* The file offsets of the string table and symbol table. */ | |
578 | obj_str_filepos (abfd) = N_STROFF (*execp); | |
579 | obj_sym_filepos (abfd) = N_SYMOFF (*execp); | |
580 | ||
581 | /* Determine the architecture and machine type of the object file. */ | |
582 | switch (N_MACHTYPE (*exec_hdr (abfd))) { | |
583 | default: | |
584 | abfd->obj_arch = bfd_arch_obscure; | |
585 | break; | |
586 | } | |
587 | ||
588 | adata(abfd)->page_size = TARGET_PAGE_SIZE; | |
589 | adata(abfd)->segment_size = SEGMENT_SIZE; | |
590 | adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE; | |
591 | ||
592 | return abfd->xvec; | |
593 | ||
594 | /* The architecture is encoded in various ways in various a.out variants, | |
595 | or is not encoded at all in some of them. The relocation size depends | |
596 | on the architecture and the a.out variant. Finally, the return value | |
597 | is the bfd_target vector in use. If an error occurs, return zero and | |
598 | set bfd_error to the appropriate error code. | |
599 | ||
600 | Formats such as b.out, which have additional fields in the a.out | |
601 | header, should cope with them in this callback as well. */ | |
602 | #endif /* DOCUMENTATION */ | |
603 | ||
beb0d161 | 604 | result = (*callback_to_real_object_p) (abfd); |
252b5132 RH |
605 | |
606 | /* Now that the segment addresses have been worked out, take a better | |
607 | guess at whether the file is executable. If the entry point | |
608 | is within the text segment, assume it is. (This makes files | |
609 | executable even if their entry point address is 0, as long as | |
610 | their text starts at zero.). | |
611 | ||
612 | This test had to be changed to deal with systems where the text segment | |
613 | runs at a different location than the default. The problem is that the | |
614 | entry address can appear to be outside the text segment, thus causing an | |
615 | erroneous conclusion that the file isn't executable. | |
616 | ||
617 | To fix this, we now accept any non-zero entry point as an indication of | |
618 | executability. This will work most of the time, since only the linker | |
0ef5a5bd | 619 | sets the entry point, and that is likely to be non-zero for most systems. */ |
252b5132 RH |
620 | |
621 | if (execp->a_entry != 0 | |
622 | || (execp->a_entry >= obj_textsec(abfd)->vma | |
623 | && execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size)) | |
624 | abfd->flags |= EXEC_P; | |
625 | #ifdef STAT_FOR_EXEC | |
626 | else | |
627 | { | |
628 | struct stat stat_buf; | |
629 | ||
630 | /* The original heuristic doesn't work in some important cases. | |
631 | The a.out file has no information about the text start | |
632 | address. For files (like kernels) linked to non-standard | |
633 | addresses (ld -Ttext nnn) the entry point may not be between | |
634 | the default text start (obj_textsec(abfd)->vma) and | |
635 | (obj_textsec(abfd)->vma) + text size. This is not just a mach | |
636 | issue. Many kernels are loaded at non standard addresses. */ | |
637 | if (abfd->iostream != NULL | |
638 | && (abfd->flags & BFD_IN_MEMORY) == 0 | |
639 | && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0) | |
640 | && ((stat_buf.st_mode & 0111) != 0)) | |
641 | abfd->flags |= EXEC_P; | |
642 | } | |
643 | #endif /* STAT_FOR_EXEC */ | |
644 | ||
645 | if (result) | |
646 | { | |
647 | #if 0 /* These should be set correctly anyways. */ | |
648 | abfd->sections = obj_textsec (abfd); | |
649 | obj_textsec (abfd)->next = obj_datasec (abfd); | |
650 | obj_datasec (abfd)->next = obj_bsssec (abfd); | |
651 | #endif | |
652 | } | |
653 | else | |
654 | { | |
655 | free (rawptr); | |
656 | abfd->tdata.aout_data = oldrawptr; | |
657 | } | |
658 | return result; | |
659 | } | |
660 | ||
661 | /* | |
662 | FUNCTION | |
663 | aout_@var{size}_mkobject | |
664 | ||
665 | SYNOPSIS | |
666 | boolean aout_@var{size}_mkobject, (bfd *abfd); | |
667 | ||
668 | DESCRIPTION | |
669 | Initialize BFD @var{abfd} for use with a.out files. | |
670 | */ | |
671 | ||
672 | boolean | |
673 | NAME(aout,mkobject) (abfd) | |
674 | bfd *abfd; | |
675 | { | |
676 | struct aout_data_struct *rawptr; | |
677 | ||
678 | bfd_set_error (bfd_error_system_call); | |
679 | ||
680 | /* Use an intermediate variable for clarity */ | |
681 | rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct )); | |
682 | ||
683 | if (rawptr == NULL) | |
684 | return false; | |
685 | ||
686 | abfd->tdata.aout_data = rawptr; | |
687 | exec_hdr (abfd) = &(rawptr->e); | |
688 | ||
689 | obj_textsec (abfd) = (asection *)NULL; | |
690 | obj_datasec (abfd) = (asection *)NULL; | |
691 | obj_bsssec (abfd) = (asection *)NULL; | |
692 | ||
693 | return true; | |
694 | } | |
695 | ||
252b5132 RH |
696 | /* |
697 | FUNCTION | |
698 | aout_@var{size}_machine_type | |
699 | ||
700 | SYNOPSIS | |
701 | enum machine_type aout_@var{size}_machine_type | |
702 | (enum bfd_architecture arch, | |
703 | unsigned long machine)); | |
704 | ||
705 | DESCRIPTION | |
706 | Keep track of machine architecture and machine type for | |
707 | a.out's. Return the <<machine_type>> for a particular | |
708 | architecture and machine, or <<M_UNKNOWN>> if that exact architecture | |
709 | and machine can't be represented in a.out format. | |
710 | ||
711 | If the architecture is understood, machine type 0 (default) | |
712 | is always understood. | |
713 | */ | |
714 | ||
715 | enum machine_type | |
716 | NAME(aout,machine_type) (arch, machine, unknown) | |
717 | enum bfd_architecture arch; | |
718 | unsigned long machine; | |
719 | boolean *unknown; | |
720 | { | |
721 | enum machine_type arch_flags; | |
722 | ||
723 | arch_flags = M_UNKNOWN; | |
724 | *unknown = true; | |
725 | ||
726 | switch (arch) { | |
727 | case bfd_arch_sparc: | |
728 | if (machine == 0 | |
729 | || machine == bfd_mach_sparc | |
730 | || machine == bfd_mach_sparc_sparclite | |
731 | || machine == bfd_mach_sparc_sparclite_le | |
732 | || machine == bfd_mach_sparc_v9) | |
733 | arch_flags = M_SPARC; | |
734 | else if (machine == bfd_mach_sparc_sparclet) | |
735 | arch_flags = M_SPARCLET; | |
736 | break; | |
737 | ||
738 | case bfd_arch_m68k: | |
739 | switch (machine) { | |
740 | case 0: arch_flags = M_68010; break; | |
741 | case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = false; break; | |
742 | case bfd_mach_m68010: arch_flags = M_68010; break; | |
743 | case bfd_mach_m68020: arch_flags = M_68020; break; | |
744 | default: arch_flags = M_UNKNOWN; break; | |
745 | } | |
746 | break; | |
747 | ||
748 | case bfd_arch_i386: | |
749 | if (machine == 0) arch_flags = M_386; | |
750 | break; | |
751 | ||
752 | case bfd_arch_a29k: | |
753 | if (machine == 0) arch_flags = M_29K; | |
754 | break; | |
755 | ||
756 | case bfd_arch_arm: | |
757 | if (machine == 0) arch_flags = M_ARM; | |
758 | break; | |
0ef5a5bd | 759 | |
252b5132 RH |
760 | case bfd_arch_mips: |
761 | switch (machine) { | |
762 | case 0: | |
763 | case bfd_mach_mips3000: | |
764 | case bfd_mach_mips3900: | |
765 | arch_flags = M_MIPS1; | |
766 | break; | |
767 | case bfd_mach_mips6000: | |
768 | arch_flags = M_MIPS2; | |
769 | break; | |
770 | case bfd_mach_mips4000: | |
771 | case bfd_mach_mips4010: | |
772 | case bfd_mach_mips4100: | |
773 | case bfd_mach_mips4300: | |
774 | case bfd_mach_mips4400: | |
775 | case bfd_mach_mips4600: | |
776 | case bfd_mach_mips4650: | |
777 | case bfd_mach_mips8000: | |
778 | case bfd_mach_mips10000: | |
d1cf510e | 779 | case bfd_mach_mips12000: |
252b5132 | 780 | case bfd_mach_mips16: |
e7af610e NC |
781 | case bfd_mach_mips32: |
782 | case bfd_mach_mips32_4k: | |
84ea6cf2 NC |
783 | case bfd_mach_mips5: |
784 | case bfd_mach_mips64: | |
c6c98b38 | 785 | case bfd_mach_mips_sb1: |
e7af610e | 786 | /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */ |
252b5132 RH |
787 | arch_flags = M_MIPS2; |
788 | break; | |
789 | default: | |
790 | arch_flags = M_UNKNOWN; | |
791 | break; | |
792 | } | |
793 | break; | |
794 | ||
795 | case bfd_arch_ns32k: | |
796 | switch (machine) { | |
797 | case 0: arch_flags = M_NS32532; break; | |
798 | case 32032: arch_flags = M_NS32032; break; | |
799 | case 32532: arch_flags = M_NS32532; break; | |
800 | default: arch_flags = M_UNKNOWN; break; | |
801 | } | |
802 | break; | |
803 | ||
804 | case bfd_arch_vax: | |
805 | *unknown = false; | |
806 | break; | |
807 | ||
06c15ad7 HPN |
808 | case bfd_arch_cris: |
809 | if (machine == 0 || machine == 255) arch_flags = M_CRIS; | |
810 | break; | |
811 | ||
252b5132 RH |
812 | default: |
813 | arch_flags = M_UNKNOWN; | |
814 | } | |
815 | ||
816 | if (arch_flags != M_UNKNOWN) | |
817 | *unknown = false; | |
818 | ||
819 | return arch_flags; | |
820 | } | |
821 | ||
252b5132 RH |
822 | /* |
823 | FUNCTION | |
824 | aout_@var{size}_set_arch_mach | |
825 | ||
826 | SYNOPSIS | |
827 | boolean aout_@var{size}_set_arch_mach, | |
828 | (bfd *, | |
829 | enum bfd_architecture arch, | |
830 | unsigned long machine)); | |
831 | ||
832 | DESCRIPTION | |
833 | Set the architecture and the machine of the BFD @var{abfd} to the | |
834 | values @var{arch} and @var{machine}. Verify that @var{abfd}'s format | |
835 | can support the architecture required. | |
836 | */ | |
837 | ||
838 | boolean | |
839 | NAME(aout,set_arch_mach) (abfd, arch, machine) | |
840 | bfd *abfd; | |
841 | enum bfd_architecture arch; | |
842 | unsigned long machine; | |
843 | { | |
844 | if (! bfd_default_set_arch_mach (abfd, arch, machine)) | |
845 | return false; | |
846 | ||
847 | if (arch != bfd_arch_unknown) | |
848 | { | |
849 | boolean unknown; | |
850 | ||
851 | NAME(aout,machine_type) (arch, machine, &unknown); | |
852 | if (unknown) | |
853 | return false; | |
854 | } | |
855 | ||
856 | /* Determine the size of a relocation entry */ | |
857 | switch (arch) { | |
858 | case bfd_arch_sparc: | |
859 | case bfd_arch_a29k: | |
860 | case bfd_arch_mips: | |
861 | obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; | |
862 | break; | |
863 | default: | |
864 | obj_reloc_entry_size (abfd) = RELOC_STD_SIZE; | |
865 | break; | |
866 | } | |
867 | ||
868 | return (*aout_backend_info(abfd)->set_sizes) (abfd); | |
869 | } | |
870 | ||
871 | static void | |
872 | adjust_o_magic (abfd, execp) | |
873 | bfd *abfd; | |
874 | struct internal_exec *execp; | |
875 | { | |
876 | file_ptr pos = adata (abfd).exec_bytes_size; | |
877 | bfd_vma vma = 0; | |
878 | int pad = 0; | |
879 | ||
880 | /* Text. */ | |
881 | obj_textsec(abfd)->filepos = pos; | |
882 | if (!obj_textsec(abfd)->user_set_vma) | |
883 | obj_textsec(abfd)->vma = vma; | |
884 | else | |
885 | vma = obj_textsec(abfd)->vma; | |
886 | ||
887 | pos += obj_textsec(abfd)->_raw_size; | |
888 | vma += obj_textsec(abfd)->_raw_size; | |
889 | ||
890 | /* Data. */ | |
891 | if (!obj_datasec(abfd)->user_set_vma) | |
892 | { | |
893 | #if 0 /* ?? Does alignment in the file image really matter? */ | |
894 | pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma; | |
895 | #endif | |
896 | obj_textsec(abfd)->_raw_size += pad; | |
897 | pos += pad; | |
898 | vma += pad; | |
899 | obj_datasec(abfd)->vma = vma; | |
900 | } | |
901 | else | |
902 | vma = obj_datasec(abfd)->vma; | |
903 | obj_datasec(abfd)->filepos = pos; | |
904 | pos += obj_datasec(abfd)->_raw_size; | |
905 | vma += obj_datasec(abfd)->_raw_size; | |
906 | ||
907 | /* BSS. */ | |
908 | if (!obj_bsssec(abfd)->user_set_vma) | |
909 | { | |
910 | #if 0 | |
911 | pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma; | |
912 | #endif | |
913 | obj_datasec(abfd)->_raw_size += pad; | |
914 | pos += pad; | |
915 | vma += pad; | |
916 | obj_bsssec(abfd)->vma = vma; | |
917 | } | |
918 | else | |
919 | { | |
920 | /* The VMA of the .bss section is set by the the VMA of the | |
921 | .data section plus the size of the .data section. We may | |
922 | need to add padding bytes to make this true. */ | |
923 | pad = obj_bsssec (abfd)->vma - vma; | |
924 | if (pad > 0) | |
925 | { | |
926 | obj_datasec (abfd)->_raw_size += pad; | |
927 | pos += pad; | |
928 | } | |
929 | } | |
930 | obj_bsssec(abfd)->filepos = pos; | |
931 | ||
932 | /* Fix up the exec header. */ | |
933 | execp->a_text = obj_textsec(abfd)->_raw_size; | |
934 | execp->a_data = obj_datasec(abfd)->_raw_size; | |
935 | execp->a_bss = obj_bsssec(abfd)->_raw_size; | |
936 | N_SET_MAGIC (*execp, OMAGIC); | |
937 | } | |
938 | ||
939 | static void | |
940 | adjust_z_magic (abfd, execp) | |
941 | bfd *abfd; | |
942 | struct internal_exec *execp; | |
943 | { | |
944 | bfd_size_type data_pad, text_pad; | |
945 | file_ptr text_end; | |
946 | CONST struct aout_backend_data *abdp; | |
947 | int ztih; /* Nonzero if text includes exec header. */ | |
0ef5a5bd | 948 | |
252b5132 RH |
949 | abdp = aout_backend_info (abfd); |
950 | ||
951 | /* Text. */ | |
952 | ztih = (abdp != NULL | |
953 | && (abdp->text_includes_header | |
954 | || obj_aout_subformat (abfd) == q_magic_format)); | |
955 | obj_textsec(abfd)->filepos = (ztih | |
956 | ? adata(abfd).exec_bytes_size | |
957 | : adata(abfd).zmagic_disk_block_size); | |
958 | if (! obj_textsec(abfd)->user_set_vma) | |
959 | { | |
960 | /* ?? Do we really need to check for relocs here? */ | |
961 | obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC) | |
962 | ? 0 | |
963 | : (ztih | |
964 | ? (abdp->default_text_vma | |
965 | + adata(abfd).exec_bytes_size) | |
966 | : abdp->default_text_vma)); | |
967 | text_pad = 0; | |
968 | } | |
969 | else | |
970 | { | |
971 | /* The .text section is being loaded at an unusual address. We | |
972 | may need to pad it such that the .data section starts at a page | |
973 | boundary. */ | |
974 | if (ztih) | |
975 | text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma) | |
976 | & (adata (abfd).page_size - 1)); | |
977 | else | |
978 | text_pad = ((- obj_textsec (abfd)->vma) | |
979 | & (adata (abfd).page_size - 1)); | |
980 | } | |
981 | ||
982 | /* Find start of data. */ | |
983 | if (ztih) | |
984 | { | |
985 | text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size; | |
986 | text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; | |
987 | } | |
988 | else | |
989 | { | |
990 | /* Note that if page_size == zmagic_disk_block_size, then | |
991 | filepos == page_size, and this case is the same as the ztih | |
992 | case. */ | |
993 | text_end = obj_textsec (abfd)->_raw_size; | |
994 | text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end; | |
995 | text_end += obj_textsec (abfd)->filepos; | |
996 | } | |
997 | obj_textsec(abfd)->_raw_size += text_pad; | |
998 | text_end += text_pad; | |
999 | ||
1000 | /* Data. */ | |
1001 | if (!obj_datasec(abfd)->user_set_vma) | |
1002 | { | |
1003 | bfd_vma vma; | |
1004 | vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size; | |
1005 | obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size); | |
1006 | } | |
1007 | if (abdp && abdp->zmagic_mapped_contiguous) | |
1008 | { | |
dee0a8f4 NC |
1009 | asection * text = obj_textsec (abfd); |
1010 | asection * data = obj_datasec (abfd); | |
1011 | ||
1012 | text_pad = data->vma - (text->vma + text->_raw_size); | |
1013 | /* Only pad the text section if the data | |
1014 | section is going to be placed after it. */ | |
1015 | if (text_pad > 0) | |
1016 | text->_raw_size += text_pad; | |
252b5132 RH |
1017 | } |
1018 | obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos | |
1019 | + obj_textsec(abfd)->_raw_size); | |
0ef5a5bd | 1020 | |
252b5132 RH |
1021 | /* Fix up exec header while we're at it. */ |
1022 | execp->a_text = obj_textsec(abfd)->_raw_size; | |
1023 | if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted))) | |
1024 | execp->a_text += adata(abfd).exec_bytes_size; | |
1025 | if (obj_aout_subformat (abfd) == q_magic_format) | |
1026 | N_SET_MAGIC (*execp, QMAGIC); | |
1027 | else | |
1028 | N_SET_MAGIC (*execp, ZMAGIC); | |
1029 | ||
1030 | /* Spec says data section should be rounded up to page boundary. */ | |
1031 | obj_datasec(abfd)->_raw_size | |
1032 | = align_power (obj_datasec(abfd)->_raw_size, | |
1033 | obj_bsssec(abfd)->alignment_power); | |
1034 | execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size, | |
1035 | adata(abfd).page_size); | |
1036 | data_pad = execp->a_data - obj_datasec(abfd)->_raw_size; | |
1037 | ||
1038 | /* BSS. */ | |
1039 | if (!obj_bsssec(abfd)->user_set_vma) | |
1040 | obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma | |
1041 | + obj_datasec(abfd)->_raw_size); | |
1042 | /* If the BSS immediately follows the data section and extra space | |
1043 | in the page is left after the data section, fudge data | |
1044 | in the header so that the bss section looks smaller by that | |
1045 | amount. We'll start the bss section there, and lie to the OS. | |
1046 | (Note that a linker script, as well as the above assignment, | |
1047 | could have explicitly set the BSS vma to immediately follow | |
1048 | the data section.) */ | |
1049 | if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power) | |
1050 | == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size) | |
1051 | execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 : | |
1052 | obj_bsssec(abfd)->_raw_size - data_pad; | |
1053 | else | |
1054 | execp->a_bss = obj_bsssec(abfd)->_raw_size; | |
1055 | } | |
1056 | ||
1057 | static void | |
1058 | adjust_n_magic (abfd, execp) | |
1059 | bfd *abfd; | |
1060 | struct internal_exec *execp; | |
1061 | { | |
1062 | file_ptr pos = adata(abfd).exec_bytes_size; | |
1063 | bfd_vma vma = 0; | |
1064 | int pad; | |
0ef5a5bd | 1065 | |
252b5132 RH |
1066 | /* Text. */ |
1067 | obj_textsec(abfd)->filepos = pos; | |
1068 | if (!obj_textsec(abfd)->user_set_vma) | |
1069 | obj_textsec(abfd)->vma = vma; | |
1070 | else | |
1071 | vma = obj_textsec(abfd)->vma; | |
1072 | pos += obj_textsec(abfd)->_raw_size; | |
1073 | vma += obj_textsec(abfd)->_raw_size; | |
1074 | ||
1075 | /* Data. */ | |
1076 | obj_datasec(abfd)->filepos = pos; | |
1077 | if (!obj_datasec(abfd)->user_set_vma) | |
1078 | obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size); | |
1079 | vma = obj_datasec(abfd)->vma; | |
0ef5a5bd | 1080 | |
252b5132 RH |
1081 | /* Since BSS follows data immediately, see if it needs alignment. */ |
1082 | vma += obj_datasec(abfd)->_raw_size; | |
1083 | pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma; | |
1084 | obj_datasec(abfd)->_raw_size += pad; | |
1085 | pos += obj_datasec(abfd)->_raw_size; | |
1086 | ||
1087 | /* BSS. */ | |
1088 | if (!obj_bsssec(abfd)->user_set_vma) | |
1089 | obj_bsssec(abfd)->vma = vma; | |
1090 | else | |
1091 | vma = obj_bsssec(abfd)->vma; | |
1092 | ||
1093 | /* Fix up exec header. */ | |
1094 | execp->a_text = obj_textsec(abfd)->_raw_size; | |
1095 | execp->a_data = obj_datasec(abfd)->_raw_size; | |
1096 | execp->a_bss = obj_bsssec(abfd)->_raw_size; | |
1097 | N_SET_MAGIC (*execp, NMAGIC); | |
1098 | } | |
1099 | ||
1100 | boolean | |
1101 | NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end) | |
1102 | bfd *abfd; | |
1103 | bfd_size_type *text_size; | |
7442e600 | 1104 | file_ptr *text_end ATTRIBUTE_UNUSED; |
252b5132 RH |
1105 | { |
1106 | struct internal_exec *execp = exec_hdr (abfd); | |
1107 | ||
1108 | if (! NAME(aout,make_sections) (abfd)) | |
1109 | return false; | |
1110 | ||
1111 | if (adata(abfd).magic != undecided_magic) | |
1112 | return true; | |
1113 | ||
1114 | obj_textsec(abfd)->_raw_size = | |
1115 | align_power(obj_textsec(abfd)->_raw_size, | |
1116 | obj_textsec(abfd)->alignment_power); | |
1117 | ||
1118 | *text_size = obj_textsec (abfd)->_raw_size; | |
1119 | /* Rule (heuristic) for when to pad to a new page. Note that there | |
1120 | are (at least) two ways demand-paged (ZMAGIC) files have been | |
1121 | handled. Most Berkeley-based systems start the text segment at | |
1122 | (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text | |
1123 | segment right after the exec header; the latter is counted in the | |
1124 | text segment size, and is paged in by the kernel with the rest of | |
0ef5a5bd | 1125 | the text. */ |
252b5132 RH |
1126 | |
1127 | /* This perhaps isn't the right way to do this, but made it simpler for me | |
1128 | to understand enough to implement it. Better would probably be to go | |
1129 | right from BFD flags to alignment/positioning characteristics. But the | |
1130 | old code was sloppy enough about handling the flags, and had enough | |
1131 | other magic, that it was a little hard for me to understand. I think | |
1132 | I understand it better now, but I haven't time to do the cleanup this | |
1133 | minute. */ | |
1134 | ||
1135 | if (abfd->flags & D_PAGED) | |
1136 | /* Whether or not WP_TEXT is set -- let D_PAGED override. */ | |
1137 | adata(abfd).magic = z_magic; | |
1138 | else if (abfd->flags & WP_TEXT) | |
1139 | adata(abfd).magic = n_magic; | |
1140 | else | |
1141 | adata(abfd).magic = o_magic; | |
1142 | ||
1143 | #ifdef BFD_AOUT_DEBUG /* requires gcc2 */ | |
1144 | #if __GNUC__ >= 2 | |
1145 | fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n", | |
1146 | ({ char *str; | |
1147 | switch (adata(abfd).magic) { | |
1148 | case n_magic: str = "NMAGIC"; break; | |
1149 | case o_magic: str = "OMAGIC"; break; | |
1150 | case z_magic: str = "ZMAGIC"; break; | |
1151 | default: abort (); | |
1152 | } | |
1153 | str; | |
1154 | }), | |
1155 | obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size, | |
1156 | obj_textsec(abfd)->alignment_power, | |
1157 | obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size, | |
1158 | obj_datasec(abfd)->alignment_power, | |
1159 | obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size, | |
1160 | obj_bsssec(abfd)->alignment_power); | |
1161 | #endif | |
1162 | #endif | |
1163 | ||
1164 | switch (adata(abfd).magic) | |
1165 | { | |
1166 | case o_magic: | |
1167 | adjust_o_magic (abfd, execp); | |
1168 | break; | |
1169 | case z_magic: | |
1170 | adjust_z_magic (abfd, execp); | |
1171 | break; | |
1172 | case n_magic: | |
1173 | adjust_n_magic (abfd, execp); | |
1174 | break; | |
1175 | default: | |
1176 | abort (); | |
1177 | } | |
1178 | ||
1179 | #ifdef BFD_AOUT_DEBUG | |
1180 | fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n", | |
1181 | obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size, | |
1182 | obj_textsec(abfd)->filepos, | |
1183 | obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size, | |
1184 | obj_datasec(abfd)->filepos, | |
1185 | obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size); | |
1186 | #endif | |
1187 | ||
1188 | return true; | |
1189 | } | |
1190 | ||
1191 | /* | |
1192 | FUNCTION | |
1193 | aout_@var{size}_new_section_hook | |
1194 | ||
1195 | SYNOPSIS | |
1196 | boolean aout_@var{size}_new_section_hook, | |
1197 | (bfd *abfd, | |
1198 | asection *newsect)); | |
1199 | ||
1200 | DESCRIPTION | |
1201 | Called by the BFD in response to a @code{bfd_make_section} | |
1202 | request. | |
1203 | */ | |
1204 | boolean | |
1205 | NAME(aout,new_section_hook) (abfd, newsect) | |
1206 | bfd *abfd; | |
1207 | asection *newsect; | |
1208 | { | |
1209 | /* align to double at least */ | |
1210 | newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power; | |
1211 | ||
252b5132 RH |
1212 | if (bfd_get_format (abfd) == bfd_object) |
1213 | { | |
1214 | if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) { | |
1215 | obj_textsec(abfd)= newsect; | |
1216 | newsect->target_index = N_TEXT; | |
1217 | return true; | |
1218 | } | |
1219 | ||
1220 | if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) { | |
1221 | obj_datasec(abfd) = newsect; | |
1222 | newsect->target_index = N_DATA; | |
1223 | return true; | |
1224 | } | |
1225 | ||
1226 | if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) { | |
1227 | obj_bsssec(abfd) = newsect; | |
1228 | newsect->target_index = N_BSS; | |
1229 | return true; | |
1230 | } | |
1231 | ||
1232 | } | |
1233 | ||
1234 | /* We allow more than three sections internally */ | |
1235 | return true; | |
1236 | } | |
1237 | ||
1238 | boolean | |
1239 | NAME(aout,set_section_contents) (abfd, section, location, offset, count) | |
1240 | bfd *abfd; | |
1241 | sec_ptr section; | |
1242 | PTR location; | |
1243 | file_ptr offset; | |
1244 | bfd_size_type count; | |
1245 | { | |
1246 | file_ptr text_end; | |
1247 | bfd_size_type text_size; | |
1248 | ||
1249 | if (! abfd->output_has_begun) | |
1250 | { | |
1251 | if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) | |
1252 | return false; | |
1253 | } | |
1254 | ||
1255 | if (section == obj_bsssec (abfd)) | |
1256 | { | |
1257 | bfd_set_error (bfd_error_no_contents); | |
1258 | return false; | |
1259 | } | |
1260 | ||
1261 | if (section != obj_textsec (abfd) | |
1262 | && section != obj_datasec (abfd)) | |
1263 | { | |
1264 | (*_bfd_error_handler) | |
1265 | (_("%s: can not represent section `%s' in a.out object file format"), | |
1266 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); | |
1267 | bfd_set_error (bfd_error_nonrepresentable_section); | |
1268 | return false; | |
1269 | } | |
1270 | ||
1271 | if (count != 0) | |
1272 | { | |
1273 | if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0 | |
1274 | || bfd_write (location, 1, count, abfd) != count) | |
1275 | return false; | |
1276 | } | |
1277 | ||
1278 | return true; | |
1279 | } | |
1280 | \f | |
1281 | /* Read the external symbols from an a.out file. */ | |
1282 | ||
1283 | static boolean | |
1284 | aout_get_external_symbols (abfd) | |
1285 | bfd *abfd; | |
1286 | { | |
1287 | if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL) | |
1288 | { | |
1289 | bfd_size_type count; | |
1290 | struct external_nlist *syms; | |
1291 | ||
1292 | count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE; | |
1293 | ||
1294 | #ifdef USE_MMAP | |
1295 | if (bfd_get_file_window (abfd, | |
1296 | obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms, | |
1297 | &obj_aout_sym_window (abfd), true) == false) | |
1298 | return false; | |
1299 | syms = (struct external_nlist *) obj_aout_sym_window (abfd).data; | |
1300 | #else | |
1301 | /* We allocate using malloc to make the values easy to free | |
1302 | later on. If we put them on the objalloc it might not be | |
1303 | possible to free them. */ | |
1304 | syms = ((struct external_nlist *) | |
1305 | bfd_malloc ((size_t) count * EXTERNAL_NLIST_SIZE)); | |
1306 | if (syms == (struct external_nlist *) NULL && count != 0) | |
1307 | return false; | |
1308 | ||
1309 | if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 | |
1310 | || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd) | |
1311 | != exec_hdr (abfd)->a_syms)) | |
1312 | { | |
1313 | free (syms); | |
1314 | return false; | |
1315 | } | |
1316 | #endif | |
1317 | ||
1318 | obj_aout_external_syms (abfd) = syms; | |
1319 | obj_aout_external_sym_count (abfd) = count; | |
1320 | } | |
0ef5a5bd | 1321 | |
252b5132 RH |
1322 | if (obj_aout_external_strings (abfd) == NULL |
1323 | && exec_hdr (abfd)->a_syms != 0) | |
1324 | { | |
1325 | unsigned char string_chars[BYTES_IN_WORD]; | |
1326 | bfd_size_type stringsize; | |
1327 | char *strings; | |
1328 | ||
1329 | /* Get the size of the strings. */ | |
1330 | if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 | |
1331 | || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd) | |
1332 | != BYTES_IN_WORD)) | |
1333 | return false; | |
1334 | stringsize = GET_WORD (abfd, string_chars); | |
1335 | ||
1336 | #ifdef USE_MMAP | |
1337 | if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize, | |
1338 | &obj_aout_string_window (abfd), true) == false) | |
1339 | return false; | |
1340 | strings = (char *) obj_aout_string_window (abfd).data; | |
1341 | #else | |
1342 | strings = (char *) bfd_malloc ((size_t) stringsize + 1); | |
1343 | if (strings == NULL) | |
1344 | return false; | |
1345 | ||
1346 | /* Skip space for the string count in the buffer for convenience | |
1347 | when using indexes. */ | |
1348 | if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD, | |
1349 | abfd) | |
1350 | != stringsize - BYTES_IN_WORD) | |
1351 | { | |
1352 | free (strings); | |
1353 | return false; | |
1354 | } | |
1355 | #endif | |
1356 | ||
1357 | /* Ensure that a zero index yields an empty string. */ | |
1358 | strings[0] = '\0'; | |
1359 | ||
1360 | strings[stringsize - 1] = 0; | |
1361 | ||
1362 | obj_aout_external_strings (abfd) = strings; | |
1363 | obj_aout_external_string_size (abfd) = stringsize; | |
1364 | } | |
1365 | ||
1366 | return true; | |
1367 | } | |
1368 | ||
1369 | /* Translate an a.out symbol into a BFD symbol. The desc, other, type | |
1370 | and symbol->value fields of CACHE_PTR will be set from the a.out | |
1371 | nlist structure. This function is responsible for setting | |
1372 | symbol->flags and symbol->section, and adjusting symbol->value. */ | |
1373 | ||
1374 | static boolean | |
1375 | translate_from_native_sym_flags (abfd, cache_ptr) | |
1376 | bfd *abfd; | |
1377 | aout_symbol_type *cache_ptr; | |
1378 | { | |
1379 | flagword visible; | |
1380 | ||
1381 | if ((cache_ptr->type & N_STAB) != 0 | |
1382 | || cache_ptr->type == N_FN) | |
1383 | { | |
1384 | asection *sec; | |
1385 | ||
1386 | /* This is a debugging symbol. */ | |
1387 | ||
1388 | cache_ptr->symbol.flags = BSF_DEBUGGING; | |
1389 | ||
1390 | /* Work out the symbol section. */ | |
1391 | switch (cache_ptr->type & N_TYPE) | |
1392 | { | |
1393 | case N_TEXT: | |
1394 | case N_FN: | |
1395 | sec = obj_textsec (abfd); | |
1396 | break; | |
1397 | case N_DATA: | |
1398 | sec = obj_datasec (abfd); | |
1399 | break; | |
1400 | case N_BSS: | |
1401 | sec = obj_bsssec (abfd); | |
1402 | break; | |
1403 | default: | |
1404 | case N_ABS: | |
1405 | sec = bfd_abs_section_ptr; | |
1406 | break; | |
1407 | } | |
1408 | ||
1409 | cache_ptr->symbol.section = sec; | |
1410 | cache_ptr->symbol.value -= sec->vma; | |
1411 | ||
1412 | return true; | |
1413 | } | |
1414 | ||
1415 | /* Get the default visibility. This does not apply to all types, so | |
1416 | we just hold it in a local variable to use if wanted. */ | |
1417 | if ((cache_ptr->type & N_EXT) == 0) | |
1418 | visible = BSF_LOCAL; | |
1419 | else | |
1420 | visible = BSF_GLOBAL; | |
1421 | ||
1422 | switch (cache_ptr->type) | |
1423 | { | |
1424 | default: | |
1425 | case N_ABS: case N_ABS | N_EXT: | |
1426 | cache_ptr->symbol.section = bfd_abs_section_ptr; | |
1427 | cache_ptr->symbol.flags = visible; | |
1428 | break; | |
1429 | ||
1430 | case N_UNDF | N_EXT: | |
1431 | if (cache_ptr->symbol.value != 0) | |
1432 | { | |
1433 | /* This is a common symbol. */ | |
1434 | cache_ptr->symbol.flags = BSF_GLOBAL; | |
1435 | cache_ptr->symbol.section = bfd_com_section_ptr; | |
1436 | } | |
1437 | else | |
1438 | { | |
1439 | cache_ptr->symbol.flags = 0; | |
1440 | cache_ptr->symbol.section = bfd_und_section_ptr; | |
1441 | } | |
1442 | break; | |
1443 | ||
1444 | case N_TEXT: case N_TEXT | N_EXT: | |
1445 | cache_ptr->symbol.section = obj_textsec (abfd); | |
1446 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; | |
1447 | cache_ptr->symbol.flags = visible; | |
1448 | break; | |
1449 | ||
1450 | /* N_SETV symbols used to represent set vectors placed in the | |
1451 | data section. They are no longer generated. Theoretically, | |
1452 | it was possible to extract the entries and combine them with | |
1453 | new ones, although I don't know if that was ever actually | |
1454 | done. Unless that feature is restored, treat them as data | |
1455 | symbols. */ | |
1456 | case N_SETV: case N_SETV | N_EXT: | |
1457 | case N_DATA: case N_DATA | N_EXT: | |
1458 | cache_ptr->symbol.section = obj_datasec (abfd); | |
1459 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; | |
1460 | cache_ptr->symbol.flags = visible; | |
1461 | break; | |
1462 | ||
1463 | case N_BSS: case N_BSS | N_EXT: | |
1464 | cache_ptr->symbol.section = obj_bsssec (abfd); | |
1465 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; | |
1466 | cache_ptr->symbol.flags = visible; | |
1467 | break; | |
1468 | ||
1469 | case N_SETA: case N_SETA | N_EXT: | |
1470 | case N_SETT: case N_SETT | N_EXT: | |
1471 | case N_SETD: case N_SETD | N_EXT: | |
1472 | case N_SETB: case N_SETB | N_EXT: | |
1473 | { | |
1474 | /* This code is no longer needed. It used to be used to make | |
1475 | the linker handle set symbols, but they are now handled in | |
1476 | the add_symbols routine instead. */ | |
1477 | #if 0 | |
1478 | asection *section; | |
1479 | arelent_chain *reloc; | |
1480 | asection *into_section; | |
1481 | ||
1482 | /* This is a set symbol. The name of the symbol is the name | |
1483 | of the set (e.g., __CTOR_LIST__). The value of the symbol | |
1484 | is the value to add to the set. We create a section with | |
1485 | the same name as the symbol, and add a reloc to insert the | |
1486 | appropriate value into the section. | |
1487 | ||
1488 | This action is actually obsolete; it used to make the | |
1489 | linker do the right thing, but the linker no longer uses | |
1490 | this function. */ | |
1491 | ||
1492 | section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name); | |
1493 | if (section == NULL) | |
1494 | { | |
1495 | char *copy; | |
1496 | ||
1497 | copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1); | |
1498 | if (copy == NULL) | |
1499 | return false; | |
1500 | ||
1501 | strcpy (copy, cache_ptr->symbol.name); | |
1502 | section = bfd_make_section (abfd, copy); | |
1503 | if (section == NULL) | |
1504 | return false; | |
1505 | } | |
1506 | ||
1507 | reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain)); | |
1508 | if (reloc == NULL) | |
1509 | return false; | |
1510 | ||
1511 | /* Build a relocation entry for the constructor. */ | |
1512 | switch (cache_ptr->type & N_TYPE) | |
1513 | { | |
1514 | case N_SETA: | |
1515 | into_section = bfd_abs_section_ptr; | |
1516 | cache_ptr->type = N_ABS; | |
1517 | break; | |
1518 | case N_SETT: | |
1519 | into_section = obj_textsec (abfd); | |
1520 | cache_ptr->type = N_TEXT; | |
1521 | break; | |
1522 | case N_SETD: | |
1523 | into_section = obj_datasec (abfd); | |
1524 | cache_ptr->type = N_DATA; | |
1525 | break; | |
1526 | case N_SETB: | |
1527 | into_section = obj_bsssec (abfd); | |
1528 | cache_ptr->type = N_BSS; | |
1529 | break; | |
1530 | } | |
1531 | ||
1532 | /* Build a relocation pointing into the constructor section | |
1533 | pointing at the symbol in the set vector specified. */ | |
1534 | reloc->relent.addend = cache_ptr->symbol.value; | |
1535 | cache_ptr->symbol.section = into_section; | |
1536 | reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr; | |
1537 | ||
1538 | /* We modify the symbol to belong to a section depending upon | |
1539 | the name of the symbol, and add to the size of the section | |
1540 | to contain a pointer to the symbol. Build a reloc entry to | |
1541 | relocate to this symbol attached to this section. */ | |
1542 | section->flags = SEC_CONSTRUCTOR | SEC_RELOC; | |
1543 | ||
1544 | section->reloc_count++; | |
1545 | section->alignment_power = 2; | |
1546 | ||
1547 | reloc->next = section->constructor_chain; | |
1548 | section->constructor_chain = reloc; | |
1549 | reloc->relent.address = section->_raw_size; | |
1550 | section->_raw_size += BYTES_IN_WORD; | |
1551 | ||
1552 | reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd); | |
1553 | ||
1554 | #endif /* 0 */ | |
1555 | ||
1556 | switch (cache_ptr->type & N_TYPE) | |
1557 | { | |
1558 | case N_SETA: | |
1559 | cache_ptr->symbol.section = bfd_abs_section_ptr; | |
1560 | break; | |
1561 | case N_SETT: | |
1562 | cache_ptr->symbol.section = obj_textsec (abfd); | |
1563 | break; | |
1564 | case N_SETD: | |
1565 | cache_ptr->symbol.section = obj_datasec (abfd); | |
1566 | break; | |
1567 | case N_SETB: | |
1568 | cache_ptr->symbol.section = obj_bsssec (abfd); | |
1569 | break; | |
1570 | } | |
1571 | ||
1572 | cache_ptr->symbol.flags |= BSF_CONSTRUCTOR; | |
1573 | } | |
1574 | break; | |
1575 | ||
1576 | case N_WARNING: | |
1577 | /* This symbol is the text of a warning message. The next | |
1578 | symbol is the symbol to associate the warning with. If a | |
1579 | reference is made to that symbol, a warning is issued. */ | |
1580 | cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING; | |
1581 | cache_ptr->symbol.section = bfd_abs_section_ptr; | |
1582 | break; | |
1583 | ||
1584 | case N_INDR: case N_INDR | N_EXT: | |
1585 | /* An indirect symbol. This consists of two symbols in a row. | |
1586 | The first symbol is the name of the indirection. The second | |
1587 | symbol is the name of the target. A reference to the first | |
1588 | symbol becomes a reference to the second. */ | |
1589 | cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible; | |
1590 | cache_ptr->symbol.section = bfd_ind_section_ptr; | |
1591 | break; | |
1592 | ||
1593 | case N_WEAKU: | |
1594 | cache_ptr->symbol.section = bfd_und_section_ptr; | |
1595 | cache_ptr->symbol.flags = BSF_WEAK; | |
1596 | break; | |
1597 | ||
1598 | case N_WEAKA: | |
1599 | cache_ptr->symbol.section = bfd_abs_section_ptr; | |
1600 | cache_ptr->symbol.flags = BSF_WEAK; | |
1601 | break; | |
1602 | ||
1603 | case N_WEAKT: | |
1604 | cache_ptr->symbol.section = obj_textsec (abfd); | |
1605 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; | |
1606 | cache_ptr->symbol.flags = BSF_WEAK; | |
1607 | break; | |
1608 | ||
1609 | case N_WEAKD: | |
1610 | cache_ptr->symbol.section = obj_datasec (abfd); | |
1611 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; | |
1612 | cache_ptr->symbol.flags = BSF_WEAK; | |
1613 | break; | |
1614 | ||
1615 | case N_WEAKB: | |
1616 | cache_ptr->symbol.section = obj_bsssec (abfd); | |
1617 | cache_ptr->symbol.value -= cache_ptr->symbol.section->vma; | |
1618 | cache_ptr->symbol.flags = BSF_WEAK; | |
1619 | break; | |
1620 | } | |
1621 | ||
1622 | return true; | |
1623 | } | |
1624 | ||
1625 | /* Set the fields of SYM_POINTER according to CACHE_PTR. */ | |
1626 | ||
1627 | static boolean | |
1628 | translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer) | |
1629 | bfd *abfd; | |
1630 | asymbol *cache_ptr; | |
1631 | struct external_nlist *sym_pointer; | |
1632 | { | |
1633 | bfd_vma value = cache_ptr->value; | |
1634 | asection *sec; | |
1635 | bfd_vma off; | |
1636 | ||
1637 | /* Mask out any existing type bits in case copying from one section | |
1638 | to another. */ | |
1639 | sym_pointer->e_type[0] &= ~N_TYPE; | |
1640 | ||
1641 | sec = bfd_get_section (cache_ptr); | |
1642 | off = 0; | |
1643 | ||
1644 | if (sec == NULL) | |
1645 | { | |
1646 | /* This case occurs, e.g., for the *DEBUG* section of a COFF | |
1647 | file. */ | |
1648 | (*_bfd_error_handler) | |
1649 | (_("%s: can not represent section for symbol `%s' in a.out object file format"), | |
0ef5a5bd | 1650 | bfd_get_filename (abfd), |
252b5132 RH |
1651 | cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*")); |
1652 | bfd_set_error (bfd_error_nonrepresentable_section); | |
1653 | return false; | |
1654 | } | |
1655 | ||
1656 | if (sec->output_section != NULL) | |
1657 | { | |
1658 | off = sec->output_offset; | |
1659 | sec = sec->output_section; | |
1660 | } | |
1661 | ||
1662 | if (bfd_is_abs_section (sec)) | |
1663 | sym_pointer->e_type[0] |= N_ABS; | |
1664 | else if (sec == obj_textsec (abfd)) | |
1665 | sym_pointer->e_type[0] |= N_TEXT; | |
1666 | else if (sec == obj_datasec (abfd)) | |
1667 | sym_pointer->e_type[0] |= N_DATA; | |
1668 | else if (sec == obj_bsssec (abfd)) | |
1669 | sym_pointer->e_type[0] |= N_BSS; | |
1670 | else if (bfd_is_und_section (sec)) | |
1671 | sym_pointer->e_type[0] = N_UNDF | N_EXT; | |
1672 | else if (bfd_is_ind_section (sec)) | |
1673 | sym_pointer->e_type[0] = N_INDR; | |
1674 | else if (bfd_is_com_section (sec)) | |
1675 | sym_pointer->e_type[0] = N_UNDF | N_EXT; | |
1676 | else | |
1677 | { | |
1678 | (*_bfd_error_handler) | |
1679 | (_("%s: can not represent section `%s' in a.out object file format"), | |
1680 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sec)); | |
1681 | bfd_set_error (bfd_error_nonrepresentable_section); | |
1682 | return false; | |
1683 | } | |
1684 | ||
1685 | /* Turn the symbol from section relative to absolute again */ | |
1686 | value += sec->vma + off; | |
1687 | ||
1688 | if ((cache_ptr->flags & BSF_WARNING) != 0) | |
1689 | sym_pointer->e_type[0] = N_WARNING; | |
1690 | ||
1691 | if ((cache_ptr->flags & BSF_DEBUGGING) != 0) | |
1692 | sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type; | |
1693 | else if ((cache_ptr->flags & BSF_GLOBAL) != 0) | |
1694 | sym_pointer->e_type[0] |= N_EXT; | |
930d924d L |
1695 | else if ((cache_ptr->flags & BSF_LOCAL) != 0) |
1696 | sym_pointer->e_type[0] &= ~N_EXT; | |
252b5132 RH |
1697 | |
1698 | if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0) | |
1699 | { | |
1700 | int type = ((aout_symbol_type *) cache_ptr)->type; | |
1701 | switch (type) | |
1702 | { | |
1703 | case N_ABS: type = N_SETA; break; | |
1704 | case N_TEXT: type = N_SETT; break; | |
1705 | case N_DATA: type = N_SETD; break; | |
1706 | case N_BSS: type = N_SETB; break; | |
1707 | } | |
1708 | sym_pointer->e_type[0] = type; | |
1709 | } | |
1710 | ||
1711 | if ((cache_ptr->flags & BSF_WEAK) != 0) | |
1712 | { | |
1713 | int type; | |
1714 | ||
1715 | switch (sym_pointer->e_type[0] & N_TYPE) | |
1716 | { | |
1717 | default: | |
1718 | case N_ABS: type = N_WEAKA; break; | |
1719 | case N_TEXT: type = N_WEAKT; break; | |
1720 | case N_DATA: type = N_WEAKD; break; | |
1721 | case N_BSS: type = N_WEAKB; break; | |
1722 | case N_UNDF: type = N_WEAKU; break; | |
1723 | } | |
1724 | sym_pointer->e_type[0] = type; | |
1725 | } | |
1726 | ||
1727 | PUT_WORD(abfd, value, sym_pointer->e_value); | |
1728 | ||
1729 | return true; | |
1730 | } | |
1731 | \f | |
0ef5a5bd | 1732 | /* Native-level interface to symbols. */ |
252b5132 RH |
1733 | |
1734 | asymbol * | |
1735 | NAME(aout,make_empty_symbol) (abfd) | |
1736 | bfd *abfd; | |
1737 | { | |
1738 | aout_symbol_type *new = | |
1739 | (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type)); | |
1740 | if (!new) | |
1741 | return NULL; | |
1742 | new->symbol.the_bfd = abfd; | |
1743 | ||
1744 | return &new->symbol; | |
1745 | } | |
1746 | ||
1747 | /* Translate a set of internal symbols into external symbols. */ | |
1748 | ||
1749 | boolean | |
1750 | NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic) | |
1751 | bfd *abfd; | |
1752 | aout_symbol_type *in; | |
1753 | struct external_nlist *ext; | |
1754 | bfd_size_type count; | |
1755 | char *str; | |
1756 | bfd_size_type strsize; | |
1757 | boolean dynamic; | |
1758 | { | |
1759 | struct external_nlist *ext_end; | |
1760 | ||
1761 | ext_end = ext + count; | |
1762 | for (; ext < ext_end; ext++, in++) | |
1763 | { | |
1764 | bfd_vma x; | |
1765 | ||
1766 | x = GET_WORD (abfd, ext->e_strx); | |
1767 | in->symbol.the_bfd = abfd; | |
1768 | ||
1769 | /* For the normal symbols, the zero index points at the number | |
1770 | of bytes in the string table but is to be interpreted as the | |
1771 | null string. For the dynamic symbols, the number of bytes in | |
1772 | the string table is stored in the __DYNAMIC structure and the | |
1773 | zero index points at an actual string. */ | |
1774 | if (x == 0 && ! dynamic) | |
1775 | in->symbol.name = ""; | |
1776 | else if (x < strsize) | |
1777 | in->symbol.name = str + x; | |
1778 | else | |
1779 | return false; | |
1780 | ||
1781 | in->symbol.value = GET_SWORD (abfd, ext->e_value); | |
1782 | in->desc = bfd_h_get_16 (abfd, ext->e_desc); | |
1783 | in->other = bfd_h_get_8 (abfd, ext->e_other); | |
1784 | in->type = bfd_h_get_8 (abfd, ext->e_type); | |
1785 | in->symbol.udata.p = NULL; | |
1786 | ||
1787 | if (! translate_from_native_sym_flags (abfd, in)) | |
1788 | return false; | |
1789 | ||
1790 | if (dynamic) | |
1791 | in->symbol.flags |= BSF_DYNAMIC; | |
1792 | } | |
1793 | ||
1794 | return true; | |
1795 | } | |
1796 | ||
1797 | /* We read the symbols into a buffer, which is discarded when this | |
1798 | function exits. We read the strings into a buffer large enough to | |
0ef5a5bd | 1799 | hold them all plus all the cached symbol entries. */ |
252b5132 RH |
1800 | |
1801 | boolean | |
1802 | NAME(aout,slurp_symbol_table) (abfd) | |
1803 | bfd *abfd; | |
1804 | { | |
1805 | struct external_nlist *old_external_syms; | |
1806 | aout_symbol_type *cached; | |
1807 | size_t cached_size; | |
1808 | ||
1809 | /* If there's no work to be done, don't do any */ | |
1810 | if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL) | |
1811 | return true; | |
1812 | ||
1813 | old_external_syms = obj_aout_external_syms (abfd); | |
1814 | ||
1815 | if (! aout_get_external_symbols (abfd)) | |
1816 | return false; | |
1817 | ||
1818 | cached_size = (obj_aout_external_sym_count (abfd) | |
1819 | * sizeof (aout_symbol_type)); | |
1820 | cached = (aout_symbol_type *) bfd_malloc (cached_size); | |
1821 | if (cached == NULL && cached_size != 0) | |
1822 | return false; | |
1823 | if (cached_size != 0) | |
1824 | memset (cached, 0, cached_size); | |
1825 | ||
1826 | /* Convert from external symbol information to internal. */ | |
1827 | if (! (NAME(aout,translate_symbol_table) | |
1828 | (abfd, cached, | |
1829 | obj_aout_external_syms (abfd), | |
1830 | obj_aout_external_sym_count (abfd), | |
1831 | obj_aout_external_strings (abfd), | |
1832 | obj_aout_external_string_size (abfd), | |
1833 | false))) | |
1834 | { | |
1835 | free (cached); | |
1836 | return false; | |
1837 | } | |
1838 | ||
1839 | bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd); | |
1840 | ||
1841 | obj_aout_symbols (abfd) = cached; | |
1842 | ||
1843 | /* It is very likely that anybody who calls this function will not | |
1844 | want the external symbol information, so if it was allocated | |
1845 | because of our call to aout_get_external_symbols, we free it up | |
1846 | right away to save space. */ | |
1847 | if (old_external_syms == (struct external_nlist *) NULL | |
1848 | && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL) | |
1849 | { | |
1850 | #ifdef USE_MMAP | |
1851 | bfd_free_window (&obj_aout_sym_window (abfd)); | |
1852 | #else | |
1853 | free (obj_aout_external_syms (abfd)); | |
1854 | #endif | |
1855 | obj_aout_external_syms (abfd) = NULL; | |
1856 | } | |
1857 | ||
1858 | return true; | |
1859 | } | |
1860 | \f | |
1861 | /* We use a hash table when writing out symbols so that we only write | |
1862 | out a particular string once. This helps particularly when the | |
1863 | linker writes out stabs debugging entries, because each different | |
1864 | contributing object file tends to have many duplicate stabs | |
1865 | strings. | |
1866 | ||
1867 | This hash table code breaks dbx on SunOS 4.1.3, so we don't do it | |
1868 | if BFD_TRADITIONAL_FORMAT is set. */ | |
1869 | ||
1870 | static bfd_size_type add_to_stringtab | |
1871 | PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean)); | |
1872 | static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *)); | |
1873 | ||
1874 | /* Get the index of a string in a strtab, adding it if it is not | |
1875 | already present. */ | |
1876 | ||
1877 | static INLINE bfd_size_type | |
1878 | add_to_stringtab (abfd, tab, str, copy) | |
1879 | bfd *abfd; | |
1880 | struct bfd_strtab_hash *tab; | |
1881 | const char *str; | |
1882 | boolean copy; | |
1883 | { | |
1884 | boolean hash; | |
1885 | bfd_size_type index; | |
1886 | ||
1887 | /* An index of 0 always means the empty string. */ | |
1888 | if (str == 0 || *str == '\0') | |
1889 | return 0; | |
1890 | ||
1891 | /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx | |
1892 | doesn't understand a hashed string table. */ | |
1893 | hash = true; | |
1894 | if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0) | |
1895 | hash = false; | |
1896 | ||
1897 | index = _bfd_stringtab_add (tab, str, hash, copy); | |
1898 | ||
1899 | if (index != (bfd_size_type) -1) | |
1900 | { | |
1901 | /* Add BYTES_IN_WORD to the return value to account for the | |
1902 | space taken up by the string table size. */ | |
1903 | index += BYTES_IN_WORD; | |
1904 | } | |
1905 | ||
1906 | return index; | |
1907 | } | |
1908 | ||
1909 | /* Write out a strtab. ABFD is already at the right location in the | |
1910 | file. */ | |
1911 | ||
1912 | static boolean | |
1913 | emit_stringtab (abfd, tab) | |
1914 | register bfd *abfd; | |
1915 | struct bfd_strtab_hash *tab; | |
1916 | { | |
1917 | bfd_byte buffer[BYTES_IN_WORD]; | |
1918 | ||
1919 | /* The string table starts with the size. */ | |
1920 | PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer); | |
1921 | if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD) | |
1922 | return false; | |
1923 | ||
1924 | return _bfd_stringtab_emit (abfd, tab); | |
1925 | } | |
1926 | \f | |
1927 | boolean | |
1928 | NAME(aout,write_syms) (abfd) | |
1929 | bfd *abfd; | |
1930 | { | |
1931 | unsigned int count ; | |
1932 | asymbol **generic = bfd_get_outsymbols (abfd); | |
1933 | struct bfd_strtab_hash *strtab; | |
1934 | ||
1935 | strtab = _bfd_stringtab_init (); | |
1936 | if (strtab == NULL) | |
1937 | return false; | |
1938 | ||
1939 | for (count = 0; count < bfd_get_symcount (abfd); count++) | |
1940 | { | |
1941 | asymbol *g = generic[count]; | |
1942 | bfd_size_type indx; | |
1943 | struct external_nlist nsp; | |
1944 | ||
1945 | indx = add_to_stringtab (abfd, strtab, g->name, false); | |
1946 | if (indx == (bfd_size_type) -1) | |
1947 | goto error_return; | |
1948 | PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx); | |
1949 | ||
1950 | if (bfd_asymbol_flavour(g) == abfd->xvec->flavour) | |
1951 | { | |
1952 | bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc); | |
1953 | bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other); | |
1954 | bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type); | |
1955 | } | |
1956 | else | |
1957 | { | |
1958 | bfd_h_put_16(abfd,0, nsp.e_desc); | |
1959 | bfd_h_put_8(abfd, 0, nsp.e_other); | |
1960 | bfd_h_put_8(abfd, 0, nsp.e_type); | |
1961 | } | |
1962 | ||
1963 | if (! translate_to_native_sym_flags (abfd, g, &nsp)) | |
1964 | goto error_return; | |
1965 | ||
1966 | if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd) | |
1967 | != EXTERNAL_NLIST_SIZE) | |
1968 | goto error_return; | |
1969 | ||
1970 | /* NB: `KEEPIT' currently overlays `udata.p', so set this only | |
1971 | here, at the end. */ | |
1972 | g->KEEPIT = count; | |
1973 | } | |
1974 | ||
1975 | if (! emit_stringtab (abfd, strtab)) | |
1976 | goto error_return; | |
1977 | ||
1978 | _bfd_stringtab_free (strtab); | |
1979 | ||
1980 | return true; | |
1981 | ||
1982 | error_return: | |
1983 | _bfd_stringtab_free (strtab); | |
1984 | return false; | |
1985 | } | |
252b5132 RH |
1986 | \f |
1987 | long | |
1988 | NAME(aout,get_symtab) (abfd, location) | |
1989 | bfd *abfd; | |
1990 | asymbol **location; | |
1991 | { | |
1992 | unsigned int counter = 0; | |
1993 | aout_symbol_type *symbase; | |
1994 | ||
beb0d161 | 1995 | if (!NAME(aout,slurp_symbol_table) (abfd)) |
252b5132 RH |
1996 | return -1; |
1997 | ||
1998 | for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);) | |
beb0d161 | 1999 | *(location++) = (asymbol *) ( symbase++); |
252b5132 RH |
2000 | *location++ =0; |
2001 | return bfd_get_symcount (abfd); | |
2002 | } | |
252b5132 RH |
2003 | \f |
2004 | /* Standard reloc stuff */ | |
0ef5a5bd | 2005 | /* Output standard relocation information to a file in target byte order. */ |
252b5132 RH |
2006 | |
2007 | extern void NAME(aout,swap_std_reloc_out) | |
2008 | PARAMS ((bfd *, arelent *, struct reloc_std_external *)); | |
2009 | ||
2010 | void | |
2011 | NAME(aout,swap_std_reloc_out) (abfd, g, natptr) | |
2012 | bfd *abfd; | |
2013 | arelent *g; | |
2014 | struct reloc_std_external *natptr; | |
2015 | { | |
2016 | int r_index; | |
2017 | asymbol *sym = *(g->sym_ptr_ptr); | |
2018 | int r_extern; | |
2019 | unsigned int r_length; | |
2020 | int r_pcrel; | |
2021 | int r_baserel, r_jmptable, r_relative; | |
2022 | asection *output_section = sym->section->output_section; | |
2023 | ||
2024 | PUT_WORD(abfd, g->address, natptr->r_address); | |
2025 | ||
2026 | r_length = g->howto->size ; /* Size as a power of two */ | |
2027 | r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */ | |
2028 | /* XXX This relies on relocs coming from a.out files. */ | |
2029 | r_baserel = (g->howto->type & 8) != 0; | |
2030 | r_jmptable = (g->howto->type & 16) != 0; | |
2031 | r_relative = (g->howto->type & 32) != 0; | |
2032 | ||
2033 | #if 0 | |
2034 | /* For a standard reloc, the addend is in the object file. */ | |
2035 | r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma; | |
2036 | #endif | |
2037 | ||
2038 | /* name was clobbered by aout_write_syms to be symbol index */ | |
2039 | ||
2040 | /* If this relocation is relative to a symbol then set the | |
2041 | r_index to the symbols index, and the r_extern bit. | |
2042 | ||
2043 | Absolute symbols can come in in two ways, either as an offset | |
2044 | from the abs section, or as a symbol which has an abs value. | |
2045 | check for that here | |
2046 | */ | |
2047 | ||
252b5132 RH |
2048 | if (bfd_is_com_section (output_section) |
2049 | || bfd_is_abs_section (output_section) | |
2050 | || bfd_is_und_section (output_section)) | |
2051 | { | |
2052 | if (bfd_abs_section_ptr->symbol == sym) | |
2053 | { | |
2054 | /* Whoops, looked like an abs symbol, but is really an offset | |
2055 | from the abs section */ | |
2056 | r_index = N_ABS; | |
2057 | r_extern = 0; | |
2058 | } | |
2059 | else | |
2060 | { | |
2061 | /* Fill in symbol */ | |
2062 | r_extern = 1; | |
2063 | r_index = (*(g->sym_ptr_ptr))->KEEPIT; | |
2064 | ||
2065 | } | |
2066 | } | |
2067 | else | |
2068 | { | |
2069 | /* Just an ordinary section */ | |
2070 | r_extern = 0; | |
2071 | r_index = output_section->target_index; | |
2072 | } | |
2073 | ||
2074 | /* now the fun stuff */ | |
2075 | if (bfd_header_big_endian (abfd)) { | |
2076 | natptr->r_index[0] = r_index >> 16; | |
2077 | natptr->r_index[1] = r_index >> 8; | |
2078 | natptr->r_index[2] = r_index; | |
2079 | natptr->r_type[0] = | |
2080 | (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0) | |
2081 | | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0) | |
2082 | | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0) | |
2083 | | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0) | |
2084 | | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0) | |
2085 | | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG); | |
2086 | } else { | |
2087 | natptr->r_index[2] = r_index >> 16; | |
2088 | natptr->r_index[1] = r_index >> 8; | |
2089 | natptr->r_index[0] = r_index; | |
2090 | natptr->r_type[0] = | |
2091 | (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0) | |
2092 | | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0) | |
2093 | | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0) | |
2094 | | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0) | |
2095 | | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0) | |
2096 | | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE); | |
2097 | } | |
2098 | } | |
2099 | ||
252b5132 | 2100 | /* Extended stuff */ |
0ef5a5bd | 2101 | /* Output extended relocation information to a file in target byte order. */ |
252b5132 RH |
2102 | |
2103 | extern void NAME(aout,swap_ext_reloc_out) | |
2104 | PARAMS ((bfd *, arelent *, struct reloc_ext_external *)); | |
2105 | ||
2106 | void | |
2107 | NAME(aout,swap_ext_reloc_out) (abfd, g, natptr) | |
2108 | bfd *abfd; | |
2109 | arelent *g; | |
2110 | register struct reloc_ext_external *natptr; | |
2111 | { | |
2112 | int r_index; | |
2113 | int r_extern; | |
2114 | unsigned int r_type; | |
2115 | unsigned int r_addend; | |
2116 | asymbol *sym = *(g->sym_ptr_ptr); | |
2117 | asection *output_section = sym->section->output_section; | |
2118 | ||
2119 | PUT_WORD (abfd, g->address, natptr->r_address); | |
2120 | ||
2121 | r_type = (unsigned int) g->howto->type; | |
2122 | ||
2123 | r_addend = g->addend; | |
2124 | if ((sym->flags & BSF_SECTION_SYM) != 0) | |
2125 | r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma; | |
2126 | ||
2127 | /* If this relocation is relative to a symbol then set the | |
2128 | r_index to the symbols index, and the r_extern bit. | |
2129 | ||
2130 | Absolute symbols can come in in two ways, either as an offset | |
2131 | from the abs section, or as a symbol which has an abs value. | |
2132 | check for that here. */ | |
2133 | ||
2134 | if (bfd_is_abs_section (bfd_get_section (sym))) | |
2135 | { | |
2136 | r_extern = 0; | |
2137 | r_index = N_ABS; | |
2138 | } | |
2139 | else if ((sym->flags & BSF_SECTION_SYM) == 0) | |
2140 | { | |
2141 | if (bfd_is_und_section (bfd_get_section (sym)) | |
2142 | || (sym->flags & BSF_GLOBAL) != 0) | |
2143 | r_extern = 1; | |
2144 | else | |
2145 | r_extern = 0; | |
2146 | r_index = (*(g->sym_ptr_ptr))->KEEPIT; | |
2147 | } | |
2148 | else | |
2149 | { | |
2150 | /* Just an ordinary section */ | |
2151 | r_extern = 0; | |
2152 | r_index = output_section->target_index; | |
2153 | } | |
2154 | ||
2155 | /* now the fun stuff */ | |
2156 | if (bfd_header_big_endian (abfd)) { | |
2157 | natptr->r_index[0] = r_index >> 16; | |
2158 | natptr->r_index[1] = r_index >> 8; | |
2159 | natptr->r_index[2] = r_index; | |
2160 | natptr->r_type[0] = | |
2161 | ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0) | |
2162 | | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG)); | |
2163 | } else { | |
2164 | natptr->r_index[2] = r_index >> 16; | |
2165 | natptr->r_index[1] = r_index >> 8; | |
2166 | natptr->r_index[0] = r_index; | |
2167 | natptr->r_type[0] = | |
2168 | (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0) | |
2169 | | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE); | |
2170 | } | |
2171 | ||
2172 | PUT_WORD (abfd, r_addend, natptr->r_addend); | |
2173 | } | |
2174 | ||
2175 | /* BFD deals internally with all things based from the section they're | |
2176 | in. so, something in 10 bytes into a text section with a base of | |
2177 | 50 would have a symbol (.text+10) and know .text vma was 50. | |
2178 | ||
2179 | Aout keeps all it's symbols based from zero, so the symbol would | |
2180 | contain 60. This macro subs the base of each section from the value | |
2181 | to give the true offset from the section */ | |
2182 | ||
252b5132 RH |
2183 | #define MOVE_ADDRESS(ad) \ |
2184 | if (r_extern) { \ | |
2185 | /* undefined symbol */ \ | |
2186 | cache_ptr->sym_ptr_ptr = symbols + r_index; \ | |
2187 | cache_ptr->addend = ad; \ | |
2188 | } else { \ | |
2189 | /* defined, section relative. replace symbol with pointer to \ | |
2190 | symbol which points to section */ \ | |
2191 | switch (r_index) { \ | |
2192 | case N_TEXT: \ | |
2193 | case N_TEXT | N_EXT: \ | |
2194 | cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \ | |
2195 | cache_ptr->addend = ad - su->textsec->vma; \ | |
2196 | break; \ | |
2197 | case N_DATA: \ | |
2198 | case N_DATA | N_EXT: \ | |
2199 | cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \ | |
2200 | cache_ptr->addend = ad - su->datasec->vma; \ | |
2201 | break; \ | |
2202 | case N_BSS: \ | |
2203 | case N_BSS | N_EXT: \ | |
2204 | cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \ | |
2205 | cache_ptr->addend = ad - su->bsssec->vma; \ | |
2206 | break; \ | |
2207 | default: \ | |
2208 | case N_ABS: \ | |
2209 | case N_ABS | N_EXT: \ | |
2210 | cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \ | |
2211 | cache_ptr->addend = ad; \ | |
2212 | break; \ | |
2213 | } \ | |
2214 | } \ | |
2215 | ||
2216 | void | |
2217 | NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount) | |
2218 | bfd *abfd; | |
2219 | struct reloc_ext_external *bytes; | |
2220 | arelent *cache_ptr; | |
2221 | asymbol **symbols; | |
2222 | bfd_size_type symcount; | |
2223 | { | |
2224 | unsigned int r_index; | |
2225 | int r_extern; | |
2226 | unsigned int r_type; | |
2227 | struct aoutdata *su = &(abfd->tdata.aout_data->a); | |
2228 | ||
2229 | cache_ptr->address = (GET_SWORD (abfd, bytes->r_address)); | |
2230 | ||
2231 | /* now the fun stuff */ | |
2232 | if (bfd_header_big_endian (abfd)) { | |
2233 | r_index = (bytes->r_index[0] << 16) | |
2234 | | (bytes->r_index[1] << 8) | |
2235 | | bytes->r_index[2]; | |
2236 | r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); | |
2237 | r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) | |
2238 | >> RELOC_EXT_BITS_TYPE_SH_BIG; | |
2239 | } else { | |
2240 | r_index = (bytes->r_index[2] << 16) | |
2241 | | (bytes->r_index[1] << 8) | |
2242 | | bytes->r_index[0]; | |
2243 | r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); | |
2244 | r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) | |
2245 | >> RELOC_EXT_BITS_TYPE_SH_LITTLE; | |
2246 | } | |
2247 | ||
2248 | cache_ptr->howto = howto_table_ext + r_type; | |
2249 | ||
2250 | /* Base relative relocs are always against the symbol table, | |
2251 | regardless of the setting of r_extern. r_extern just reflects | |
2252 | whether the symbol the reloc is against is local or global. */ | |
2253 | if (r_type == RELOC_BASE10 | |
2254 | || r_type == RELOC_BASE13 | |
2255 | || r_type == RELOC_BASE22) | |
2256 | r_extern = 1; | |
2257 | ||
2258 | if (r_extern && r_index > symcount) | |
2259 | { | |
2260 | /* We could arrange to return an error, but it might be useful | |
2261 | to see the file even if it is bad. */ | |
2262 | r_extern = 0; | |
2263 | r_index = N_ABS; | |
2264 | } | |
2265 | ||
2266 | MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend)); | |
2267 | } | |
2268 | ||
2269 | void | |
2270 | NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount) | |
2271 | bfd *abfd; | |
2272 | struct reloc_std_external *bytes; | |
2273 | arelent *cache_ptr; | |
2274 | asymbol **symbols; | |
2275 | bfd_size_type symcount; | |
2276 | { | |
2277 | unsigned int r_index; | |
2278 | int r_extern; | |
2279 | unsigned int r_length; | |
2280 | int r_pcrel; | |
2281 | int r_baserel, r_jmptable, r_relative; | |
2282 | struct aoutdata *su = &(abfd->tdata.aout_data->a); | |
2283 | unsigned int howto_idx; | |
2284 | ||
2285 | cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address); | |
2286 | ||
2287 | /* now the fun stuff */ | |
2288 | if (bfd_header_big_endian (abfd)) { | |
2289 | r_index = (bytes->r_index[0] << 16) | |
2290 | | (bytes->r_index[1] << 8) | |
2291 | | bytes->r_index[2]; | |
2292 | r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); | |
2293 | r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); | |
2294 | r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); | |
2295 | r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); | |
2296 | r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); | |
2297 | r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) | |
2298 | >> RELOC_STD_BITS_LENGTH_SH_BIG; | |
2299 | } else { | |
2300 | r_index = (bytes->r_index[2] << 16) | |
2301 | | (bytes->r_index[1] << 8) | |
2302 | | bytes->r_index[0]; | |
2303 | r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); | |
2304 | r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); | |
2305 | r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE)); | |
2306 | r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE)); | |
2307 | r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE)); | |
2308 | r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) | |
2309 | >> RELOC_STD_BITS_LENGTH_SH_LITTLE; | |
2310 | } | |
2311 | ||
2312 | howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel | |
2313 | + 16 * r_jmptable + 32 * r_relative; | |
2314 | BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std)); | |
2315 | cache_ptr->howto = howto_table_std + howto_idx; | |
2316 | BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1); | |
2317 | ||
2318 | /* Base relative relocs are always against the symbol table, | |
2319 | regardless of the setting of r_extern. r_extern just reflects | |
2320 | whether the symbol the reloc is against is local or global. */ | |
2321 | if (r_baserel) | |
2322 | r_extern = 1; | |
2323 | ||
2324 | if (r_extern && r_index > symcount) | |
2325 | { | |
2326 | /* We could arrange to return an error, but it might be useful | |
2327 | to see the file even if it is bad. */ | |
2328 | r_extern = 0; | |
2329 | r_index = N_ABS; | |
2330 | } | |
2331 | ||
2332 | MOVE_ADDRESS(0); | |
2333 | } | |
2334 | ||
2335 | /* Read and swap the relocs for a section. */ | |
2336 | ||
2337 | boolean | |
2338 | NAME(aout,slurp_reloc_table) (abfd, asect, symbols) | |
2339 | bfd *abfd; | |
2340 | sec_ptr asect; | |
2341 | asymbol **symbols; | |
2342 | { | |
2343 | unsigned int count; | |
2344 | bfd_size_type reloc_size; | |
2345 | PTR relocs; | |
2346 | arelent *reloc_cache; | |
2347 | size_t each_size; | |
2348 | unsigned int counter = 0; | |
2349 | arelent *cache_ptr; | |
2350 | ||
2351 | if (asect->relocation) | |
2352 | return true; | |
2353 | ||
2354 | if (asect->flags & SEC_CONSTRUCTOR) | |
2355 | return true; | |
2356 | ||
2357 | if (asect == obj_datasec (abfd)) | |
2358 | reloc_size = exec_hdr(abfd)->a_drsize; | |
2359 | else if (asect == obj_textsec (abfd)) | |
2360 | reloc_size = exec_hdr(abfd)->a_trsize; | |
2361 | else if (asect == obj_bsssec (abfd)) | |
2362 | reloc_size = 0; | |
2363 | else | |
2364 | { | |
2365 | bfd_set_error (bfd_error_invalid_operation); | |
2366 | return false; | |
2367 | } | |
2368 | ||
2369 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) | |
2370 | return false; | |
2371 | ||
2372 | each_size = obj_reloc_entry_size (abfd); | |
2373 | ||
2374 | count = reloc_size / each_size; | |
2375 | ||
2376 | reloc_cache = (arelent *) bfd_malloc ((size_t) (count * sizeof (arelent))); | |
2377 | if (reloc_cache == NULL && count != 0) | |
2378 | return false; | |
2379 | memset (reloc_cache, 0, count * sizeof (arelent)); | |
2380 | ||
2381 | relocs = bfd_malloc ((size_t) reloc_size); | |
2382 | if (relocs == NULL && reloc_size != 0) | |
2383 | { | |
2384 | free (reloc_cache); | |
2385 | return false; | |
2386 | } | |
2387 | ||
2388 | if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size) | |
2389 | { | |
2390 | free (relocs); | |
2391 | free (reloc_cache); | |
2392 | return false; | |
2393 | } | |
2394 | ||
2395 | cache_ptr = reloc_cache; | |
2396 | if (each_size == RELOC_EXT_SIZE) | |
2397 | { | |
2398 | register struct reloc_ext_external *rptr = | |
2399 | (struct reloc_ext_external *) relocs; | |
2400 | ||
2401 | for (; counter < count; counter++, rptr++, cache_ptr++) | |
1642229e HPN |
2402 | MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols, |
2403 | bfd_get_symcount (abfd)); | |
252b5132 RH |
2404 | } |
2405 | else | |
2406 | { | |
2407 | register struct reloc_std_external *rptr = | |
2408 | (struct reloc_std_external *) relocs; | |
2409 | ||
2410 | for (; counter < count; counter++, rptr++, cache_ptr++) | |
2411 | MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols, | |
2412 | bfd_get_symcount (abfd)); | |
2413 | } | |
2414 | ||
2415 | free (relocs); | |
2416 | ||
2417 | asect->relocation = reloc_cache; | |
2418 | asect->reloc_count = cache_ptr - reloc_cache; | |
2419 | ||
2420 | return true; | |
2421 | } | |
2422 | ||
2423 | /* Write out a relocation section into an object file. */ | |
2424 | ||
2425 | boolean | |
2426 | NAME(aout,squirt_out_relocs) (abfd, section) | |
2427 | bfd *abfd; | |
2428 | asection *section; | |
2429 | { | |
2430 | arelent **generic; | |
2431 | unsigned char *native, *natptr; | |
2432 | size_t each_size; | |
2433 | ||
2434 | unsigned int count = section->reloc_count; | |
2435 | size_t natsize; | |
2436 | ||
2437 | if (count == 0 || section->orelocation == NULL) | |
2438 | return true; | |
2439 | ||
2440 | each_size = obj_reloc_entry_size (abfd); | |
2441 | natsize = each_size * count; | |
2442 | native = (unsigned char *) bfd_zalloc (abfd, natsize); | |
2443 | if (!native) | |
2444 | return false; | |
2445 | ||
2446 | generic = section->orelocation; | |
2447 | ||
2448 | if (each_size == RELOC_EXT_SIZE) | |
2449 | { | |
2450 | for (natptr = native; | |
2451 | count != 0; | |
2452 | --count, natptr += each_size, ++generic) | |
1642229e HPN |
2453 | MY_swap_ext_reloc_out (abfd, *generic, |
2454 | (struct reloc_ext_external *) natptr); | |
252b5132 RH |
2455 | } |
2456 | else | |
2457 | { | |
2458 | for (natptr = native; | |
2459 | count != 0; | |
2460 | --count, natptr += each_size, ++generic) | |
2461 | MY_swap_std_reloc_out(abfd, *generic, (struct reloc_std_external *)natptr); | |
2462 | } | |
2463 | ||
2464 | if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) { | |
2465 | bfd_release(abfd, native); | |
2466 | return false; | |
2467 | } | |
2468 | bfd_release (abfd, native); | |
2469 | ||
2470 | return true; | |
2471 | } | |
2472 | ||
2473 | /* This is stupid. This function should be a boolean predicate */ | |
2474 | long | |
2475 | NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols) | |
2476 | bfd *abfd; | |
2477 | sec_ptr section; | |
2478 | arelent **relptr; | |
2479 | asymbol **symbols; | |
2480 | { | |
2481 | arelent *tblptr = section->relocation; | |
2482 | unsigned int count; | |
2483 | ||
2484 | if (section == obj_bsssec (abfd)) | |
2485 | { | |
2486 | *relptr = NULL; | |
2487 | return 0; | |
2488 | } | |
2489 | ||
beb0d161 | 2490 | if (!(tblptr || NAME(aout,slurp_reloc_table) (abfd, section, symbols))) |
252b5132 RH |
2491 | return -1; |
2492 | ||
2493 | if (section->flags & SEC_CONSTRUCTOR) { | |
2494 | arelent_chain *chain = section->constructor_chain; | |
2495 | for (count = 0; count < section->reloc_count; count ++) { | |
2496 | *relptr ++ = &chain->relent; | |
2497 | chain = chain->next; | |
2498 | } | |
2499 | } | |
2500 | else { | |
2501 | tblptr = section->relocation; | |
2502 | ||
2503 | for (count = 0; count++ < section->reloc_count;) | |
2504 | { | |
2505 | *relptr++ = tblptr++; | |
2506 | } | |
2507 | } | |
2508 | *relptr = 0; | |
2509 | ||
2510 | return section->reloc_count; | |
2511 | } | |
2512 | ||
2513 | long | |
2514 | NAME(aout,get_reloc_upper_bound) (abfd, asect) | |
2515 | bfd *abfd; | |
2516 | sec_ptr asect; | |
2517 | { | |
2518 | if (bfd_get_format (abfd) != bfd_object) { | |
2519 | bfd_set_error (bfd_error_invalid_operation); | |
2520 | return -1; | |
2521 | } | |
2522 | if (asect->flags & SEC_CONSTRUCTOR) { | |
2523 | return (sizeof (arelent *) * (asect->reloc_count+1)); | |
2524 | } | |
2525 | ||
2526 | if (asect == obj_datasec (abfd)) | |
2527 | return (sizeof (arelent *) | |
2528 | * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd)) | |
2529 | + 1)); | |
2530 | ||
2531 | if (asect == obj_textsec (abfd)) | |
2532 | return (sizeof (arelent *) | |
2533 | * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd)) | |
2534 | + 1)); | |
2535 | ||
2536 | if (asect == obj_bsssec (abfd)) | |
2537 | return sizeof (arelent *); | |
2538 | ||
2539 | if (asect == obj_bsssec (abfd)) | |
2540 | return 0; | |
2541 | ||
2542 | bfd_set_error (bfd_error_invalid_operation); | |
2543 | return -1; | |
2544 | } | |
252b5132 RH |
2545 | \f |
2546 | long | |
2547 | NAME(aout,get_symtab_upper_bound) (abfd) | |
2548 | bfd *abfd; | |
2549 | { | |
beb0d161 | 2550 | if (!NAME(aout,slurp_symbol_table) (abfd)) |
252b5132 RH |
2551 | return -1; |
2552 | ||
2553 | return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *)); | |
2554 | } | |
2555 | ||
252b5132 RH |
2556 | alent * |
2557 | NAME(aout,get_lineno) (ignore_abfd, ignore_symbol) | |
7442e600 ILT |
2558 | bfd *ignore_abfd ATTRIBUTE_UNUSED; |
2559 | asymbol *ignore_symbol ATTRIBUTE_UNUSED; | |
252b5132 | 2560 | { |
7442e600 | 2561 | return (alent *)NULL; |
252b5132 RH |
2562 | } |
2563 | ||
252b5132 RH |
2564 | void |
2565 | NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret) | |
7442e600 | 2566 | bfd *ignore_abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
2567 | asymbol *symbol; |
2568 | symbol_info *ret; | |
2569 | { | |
2570 | bfd_symbol_info (symbol, ret); | |
2571 | ||
2572 | if (ret->type == '?') | |
2573 | { | |
2574 | int type_code = aout_symbol(symbol)->type & 0xff; | |
2575 | const char *stab_name = bfd_get_stab_name (type_code); | |
2576 | static char buf[10]; | |
2577 | ||
2578 | if (stab_name == NULL) | |
2579 | { | |
e60b52c6 | 2580 | sprintf (buf, "(%d)", type_code); |
252b5132 RH |
2581 | stab_name = buf; |
2582 | } | |
2583 | ret->type = '-'; | |
2584 | ret->stab_type = type_code; | |
beb0d161 KH |
2585 | ret->stab_other = (unsigned) (aout_symbol(symbol)->other & 0xff); |
2586 | ret->stab_desc = (unsigned) (aout_symbol(symbol)->desc & 0xffff); | |
252b5132 RH |
2587 | ret->stab_name = stab_name; |
2588 | } | |
2589 | } | |
2590 | ||
252b5132 RH |
2591 | void |
2592 | NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how) | |
7442e600 | 2593 | bfd *ignore_abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
2594 | PTR afile; |
2595 | asymbol *symbol; | |
2596 | bfd_print_symbol_type how; | |
2597 | { | |
2598 | FILE *file = (FILE *)afile; | |
2599 | ||
2600 | switch (how) { | |
2601 | case bfd_print_symbol_name: | |
2602 | if (symbol->name) | |
e60b52c6 | 2603 | fprintf (file,"%s", symbol->name); |
252b5132 RH |
2604 | break; |
2605 | case bfd_print_symbol_more: | |
e60b52c6 | 2606 | fprintf (file,"%4x %2x %2x",(unsigned) (aout_symbol(symbol)->desc & 0xffff), |
beb0d161 KH |
2607 | (unsigned) (aout_symbol(symbol)->other & 0xff), |
2608 | (unsigned) (aout_symbol(symbol)->type)); | |
252b5132 RH |
2609 | break; |
2610 | case bfd_print_symbol_all: | |
2611 | { | |
2612 | CONST char *section_name = symbol->section->name; | |
2613 | ||
252b5132 RH |
2614 | bfd_print_symbol_vandf((PTR)file,symbol); |
2615 | ||
e60b52c6 | 2616 | fprintf (file," %-5s %04x %02x %02x", |
252b5132 | 2617 | section_name, |
beb0d161 KH |
2618 | (unsigned) (aout_symbol(symbol)->desc & 0xffff), |
2619 | (unsigned) (aout_symbol(symbol)->other & 0xff), | |
2620 | (unsigned) (aout_symbol(symbol)->type & 0xff)); | |
252b5132 | 2621 | if (symbol->name) |
e60b52c6 | 2622 | fprintf (file," %s", symbol->name); |
252b5132 RH |
2623 | } |
2624 | break; | |
2625 | } | |
2626 | } | |
2627 | ||
2628 | /* If we don't have to allocate more than 1MB to hold the generic | |
2629 | symbols, we use the generic minisymbol methord: it's faster, since | |
2630 | it only translates the symbols once, not multiple times. */ | |
2631 | #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol)) | |
2632 | ||
2633 | /* Read minisymbols. For minisymbols, we use the unmodified a.out | |
2634 | symbols. The minisymbol_to_symbol function translates these into | |
2635 | BFD asymbol structures. */ | |
2636 | ||
2637 | long | |
2638 | NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep) | |
2639 | bfd *abfd; | |
2640 | boolean dynamic; | |
2641 | PTR *minisymsp; | |
2642 | unsigned int *sizep; | |
2643 | { | |
2644 | if (dynamic) | |
2645 | { | |
2646 | /* We could handle the dynamic symbols here as well, but it's | |
2647 | easier to hand them off. */ | |
2648 | return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); | |
2649 | } | |
2650 | ||
2651 | if (! aout_get_external_symbols (abfd)) | |
2652 | return -1; | |
2653 | ||
2654 | if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) | |
2655 | return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep); | |
2656 | ||
2657 | *minisymsp = (PTR) obj_aout_external_syms (abfd); | |
2658 | ||
2659 | /* By passing the external symbols back from this routine, we are | |
2660 | giving up control over the memory block. Clear | |
2661 | obj_aout_external_syms, so that we do not try to free it | |
2662 | ourselves. */ | |
2663 | obj_aout_external_syms (abfd) = NULL; | |
2664 | ||
2665 | *sizep = EXTERNAL_NLIST_SIZE; | |
2666 | return obj_aout_external_sym_count (abfd); | |
2667 | } | |
2668 | ||
2669 | /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an | |
2670 | unmodified a.out symbol. The SYM argument is a structure returned | |
2671 | by bfd_make_empty_symbol, which we fill in here. */ | |
2672 | ||
2673 | asymbol * | |
2674 | NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym) | |
2675 | bfd *abfd; | |
2676 | boolean dynamic; | |
2677 | const PTR minisym; | |
2678 | asymbol *sym; | |
2679 | { | |
2680 | if (dynamic | |
2681 | || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD) | |
2682 | return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym); | |
2683 | ||
2684 | memset (sym, 0, sizeof (aout_symbol_type)); | |
2685 | ||
2686 | /* We call translate_symbol_table to translate a single symbol. */ | |
2687 | if (! (NAME(aout,translate_symbol_table) | |
2688 | (abfd, | |
2689 | (aout_symbol_type *) sym, | |
2690 | (struct external_nlist *) minisym, | |
2691 | (bfd_size_type) 1, | |
2692 | obj_aout_external_strings (abfd), | |
2693 | obj_aout_external_string_size (abfd), | |
2694 | false))) | |
2695 | return NULL; | |
2696 | ||
2697 | return sym; | |
2698 | } | |
2699 | ||
2700 | /* | |
2701 | provided a BFD, a section and an offset into the section, calculate | |
2702 | and return the name of the source file and the line nearest to the | |
2703 | wanted location. | |
2704 | */ | |
2705 | ||
2706 | boolean | |
2707 | NAME(aout,find_nearest_line) | |
2708 | (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr) | |
2709 | bfd *abfd; | |
2710 | asection *section; | |
2711 | asymbol **symbols; | |
2712 | bfd_vma offset; | |
2713 | CONST char **filename_ptr; | |
2714 | CONST char **functionname_ptr; | |
2715 | unsigned int *line_ptr; | |
2716 | { | |
2717 | /* Run down the file looking for the filename, function and linenumber */ | |
2718 | asymbol **p; | |
2719 | CONST char *directory_name = NULL; | |
2720 | CONST char *main_file_name = NULL; | |
2721 | CONST char *current_file_name = NULL; | |
0ef5a5bd KH |
2722 | CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */ |
2723 | CONST char *line_directory_name = NULL; /* Value of directory_name at line number. */ | |
252b5132 RH |
2724 | bfd_vma low_line_vma = 0; |
2725 | bfd_vma low_func_vma = 0; | |
2726 | asymbol *func = 0; | |
2727 | size_t filelen, funclen; | |
2728 | char *buf; | |
2729 | ||
2730 | *filename_ptr = abfd->filename; | |
2731 | *functionname_ptr = 0; | |
2732 | *line_ptr = 0; | |
2733 | if (symbols != (asymbol **)NULL) { | |
2734 | for (p = symbols; *p; p++) { | |
beb0d161 | 2735 | aout_symbol_type *q = (aout_symbol_type *) (*p); |
252b5132 RH |
2736 | next: |
2737 | switch (q->type){ | |
2738 | case N_TEXT: | |
2739 | /* If this looks like a file name symbol, and it comes after | |
2740 | the line number we have found so far, but before the | |
2741 | offset, then we have probably not found the right line | |
2742 | number. */ | |
2743 | if (q->symbol.value <= offset | |
2744 | && ((q->symbol.value > low_line_vma | |
2745 | && (line_file_name != NULL | |
2746 | || *line_ptr != 0)) | |
2747 | || (q->symbol.value > low_func_vma | |
2748 | && func != NULL))) | |
2749 | { | |
2750 | const char *symname; | |
2751 | ||
2752 | symname = q->symbol.name; | |
2753 | if (strcmp (symname + strlen (symname) - 2, ".o") == 0) | |
2754 | { | |
2755 | if (q->symbol.value > low_line_vma) | |
2756 | { | |
2757 | *line_ptr = 0; | |
2758 | line_file_name = NULL; | |
2759 | } | |
2760 | if (q->symbol.value > low_func_vma) | |
2761 | func = NULL; | |
2762 | } | |
2763 | } | |
2764 | break; | |
2765 | ||
2766 | case N_SO: | |
2767 | /* If this symbol is less than the offset, but greater than | |
2768 | the line number we have found so far, then we have not | |
2769 | found the right line number. */ | |
2770 | if (q->symbol.value <= offset) | |
2771 | { | |
2772 | if (q->symbol.value > low_line_vma) | |
2773 | { | |
2774 | *line_ptr = 0; | |
2775 | line_file_name = NULL; | |
2776 | } | |
2777 | if (q->symbol.value > low_func_vma) | |
2778 | func = NULL; | |
2779 | } | |
2780 | ||
2781 | main_file_name = current_file_name = q->symbol.name; | |
0ef5a5bd | 2782 | /* Look ahead to next symbol to check if that too is an N_SO. */ |
252b5132 RH |
2783 | p++; |
2784 | if (*p == NULL) | |
2785 | break; | |
beb0d161 | 2786 | q = (aout_symbol_type *) (*p); |
252b5132 RH |
2787 | if (q->type != (int)N_SO) |
2788 | goto next; | |
2789 | ||
0ef5a5bd | 2790 | /* Found a second N_SO First is directory; second is filename. */ |
252b5132 RH |
2791 | directory_name = current_file_name; |
2792 | main_file_name = current_file_name = q->symbol.name; | |
2793 | if (obj_textsec(abfd) != section) | |
2794 | goto done; | |
2795 | break; | |
2796 | case N_SOL: | |
2797 | current_file_name = q->symbol.name; | |
2798 | break; | |
2799 | ||
2800 | case N_SLINE: | |
2801 | ||
2802 | case N_DSLINE: | |
2803 | case N_BSLINE: | |
2804 | /* We'll keep this if it resolves nearer than the one we have | |
2805 | already. */ | |
2806 | if (q->symbol.value >= low_line_vma | |
2807 | && q->symbol.value <= offset) | |
2808 | { | |
2809 | *line_ptr = q->desc; | |
2810 | low_line_vma = q->symbol.value; | |
2811 | line_file_name = current_file_name; | |
2812 | line_directory_name = directory_name; | |
2813 | } | |
2814 | break; | |
2815 | case N_FUN: | |
2816 | { | |
2817 | /* We'll keep this if it is nearer than the one we have already */ | |
2818 | if (q->symbol.value >= low_func_vma && | |
2819 | q->symbol.value <= offset) { | |
2820 | low_func_vma = q->symbol.value; | |
2821 | func = (asymbol *)q; | |
2822 | } | |
2823 | else if (q->symbol.value > offset) | |
2824 | goto done; | |
2825 | } | |
2826 | break; | |
2827 | } | |
2828 | } | |
2829 | } | |
2830 | ||
2831 | done: | |
2832 | if (*line_ptr != 0) | |
2833 | { | |
2834 | main_file_name = line_file_name; | |
2835 | directory_name = line_directory_name; | |
2836 | } | |
2837 | ||
2838 | if (main_file_name == NULL | |
5af11cab | 2839 | || IS_ABSOLUTE_PATH (main_file_name) |
252b5132 RH |
2840 | || directory_name == NULL) |
2841 | filelen = 0; | |
2842 | else | |
2843 | filelen = strlen (directory_name) + strlen (main_file_name); | |
2844 | if (func == NULL) | |
2845 | funclen = 0; | |
2846 | else | |
2847 | funclen = strlen (bfd_asymbol_name (func)); | |
2848 | ||
2849 | if (adata (abfd).line_buf != NULL) | |
2850 | free (adata (abfd).line_buf); | |
2851 | if (filelen + funclen == 0) | |
2852 | adata (abfd).line_buf = buf = NULL; | |
2853 | else | |
2854 | { | |
2855 | buf = (char *) bfd_malloc (filelen + funclen + 3); | |
2856 | adata (abfd).line_buf = buf; | |
2857 | if (buf == NULL) | |
2858 | return false; | |
2859 | } | |
2860 | ||
2861 | if (main_file_name != NULL) | |
2862 | { | |
5af11cab | 2863 | if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL) |
252b5132 RH |
2864 | *filename_ptr = main_file_name; |
2865 | else | |
2866 | { | |
2867 | sprintf (buf, "%s%s", directory_name, main_file_name); | |
2868 | *filename_ptr = buf; | |
2869 | buf += filelen + 1; | |
2870 | } | |
2871 | } | |
2872 | ||
2873 | if (func) | |
2874 | { | |
2875 | const char *function = func->name; | |
2876 | char *p; | |
2877 | ||
2878 | /* The caller expects a symbol name. We actually have a | |
2879 | function name, without the leading underscore. Put the | |
2880 | underscore back in, so that the caller gets a symbol name. */ | |
2881 | if (bfd_get_symbol_leading_char (abfd) == '\0') | |
2882 | strcpy (buf, function); | |
2883 | else | |
2884 | { | |
2885 | buf[0] = bfd_get_symbol_leading_char (abfd); | |
2886 | strcpy (buf + 1, function); | |
2887 | } | |
2888 | /* Have to remove : stuff */ | |
2889 | p = strchr (buf, ':'); | |
2890 | if (p != NULL) | |
2891 | *p = '\0'; | |
2892 | *functionname_ptr = buf; | |
2893 | } | |
2894 | ||
2895 | return true; | |
2896 | } | |
2897 | ||
252b5132 RH |
2898 | int |
2899 | NAME(aout,sizeof_headers) (abfd, execable) | |
2900 | bfd *abfd; | |
7442e600 | 2901 | boolean execable ATTRIBUTE_UNUSED; |
252b5132 RH |
2902 | { |
2903 | return adata(abfd).exec_bytes_size; | |
2904 | } | |
2905 | ||
2906 | /* Free all information we have cached for this BFD. We can always | |
2907 | read it again later if we need it. */ | |
2908 | ||
2909 | boolean | |
2910 | NAME(aout,bfd_free_cached_info) (abfd) | |
2911 | bfd *abfd; | |
2912 | { | |
2913 | asection *o; | |
2914 | ||
920581c5 L |
2915 | if (bfd_get_format (abfd) != bfd_object |
2916 | || abfd->tdata.aout_data == NULL) | |
252b5132 RH |
2917 | return true; |
2918 | ||
2919 | #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; } | |
2920 | BFCI_FREE (obj_aout_symbols (abfd)); | |
2921 | #ifdef USE_MMAP | |
2922 | obj_aout_external_syms (abfd) = 0; | |
2923 | bfd_free_window (&obj_aout_sym_window (abfd)); | |
2924 | bfd_free_window (&obj_aout_string_window (abfd)); | |
2925 | obj_aout_external_strings (abfd) = 0; | |
2926 | #else | |
2927 | BFCI_FREE (obj_aout_external_syms (abfd)); | |
2928 | BFCI_FREE (obj_aout_external_strings (abfd)); | |
2929 | #endif | |
2930 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
2931 | BFCI_FREE (o->relocation); | |
2932 | #undef BFCI_FREE | |
2933 | ||
2934 | return true; | |
2935 | } | |
2936 | \f | |
2937 | /* a.out link code. */ | |
2938 | ||
2939 | static boolean aout_link_add_object_symbols | |
2940 | PARAMS ((bfd *, struct bfd_link_info *)); | |
2941 | static boolean aout_link_check_archive_element | |
2942 | PARAMS ((bfd *, struct bfd_link_info *, boolean *)); | |
2943 | static boolean aout_link_free_symbols PARAMS ((bfd *)); | |
2944 | static boolean aout_link_check_ar_symbols | |
2945 | PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded)); | |
2946 | static boolean aout_link_add_symbols | |
2947 | PARAMS ((bfd *, struct bfd_link_info *)); | |
2948 | ||
2949 | /* Routine to create an entry in an a.out link hash table. */ | |
2950 | ||
2951 | struct bfd_hash_entry * | |
2952 | NAME(aout,link_hash_newfunc) (entry, table, string) | |
2953 | struct bfd_hash_entry *entry; | |
2954 | struct bfd_hash_table *table; | |
2955 | const char *string; | |
2956 | { | |
2957 | struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry; | |
2958 | ||
2959 | /* Allocate the structure if it has not already been allocated by a | |
2960 | subclass. */ | |
2961 | if (ret == (struct aout_link_hash_entry *) NULL) | |
2962 | ret = ((struct aout_link_hash_entry *) | |
2963 | bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry))); | |
2964 | if (ret == (struct aout_link_hash_entry *) NULL) | |
2965 | return (struct bfd_hash_entry *) ret; | |
2966 | ||
2967 | /* Call the allocation method of the superclass. */ | |
2968 | ret = ((struct aout_link_hash_entry *) | |
2969 | _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
2970 | table, string)); | |
2971 | if (ret) | |
2972 | { | |
2973 | /* Set local fields. */ | |
2974 | ret->written = false; | |
2975 | ret->indx = -1; | |
2976 | } | |
2977 | ||
2978 | return (struct bfd_hash_entry *) ret; | |
2979 | } | |
2980 | ||
2981 | /* Initialize an a.out link hash table. */ | |
2982 | ||
2983 | boolean | |
2984 | NAME(aout,link_hash_table_init) (table, abfd, newfunc) | |
2985 | struct aout_link_hash_table *table; | |
2986 | bfd *abfd; | |
2987 | struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, | |
2988 | struct bfd_hash_table *, | |
2989 | const char *)); | |
2990 | { | |
2991 | return _bfd_link_hash_table_init (&table->root, abfd, newfunc); | |
2992 | } | |
2993 | ||
2994 | /* Create an a.out link hash table. */ | |
2995 | ||
2996 | struct bfd_link_hash_table * | |
2997 | NAME(aout,link_hash_table_create) (abfd) | |
2998 | bfd *abfd; | |
2999 | { | |
3000 | struct aout_link_hash_table *ret; | |
3001 | ||
3002 | ret = ((struct aout_link_hash_table *) | |
3003 | bfd_alloc (abfd, sizeof (struct aout_link_hash_table))); | |
3004 | if (ret == NULL) | |
3005 | return (struct bfd_link_hash_table *) NULL; | |
3006 | if (! NAME(aout,link_hash_table_init) (ret, abfd, | |
3007 | NAME(aout,link_hash_newfunc))) | |
3008 | { | |
3009 | free (ret); | |
3010 | return (struct bfd_link_hash_table *) NULL; | |
3011 | } | |
3012 | return &ret->root; | |
3013 | } | |
3014 | ||
3015 | /* Given an a.out BFD, add symbols to the global hash table as | |
3016 | appropriate. */ | |
3017 | ||
3018 | boolean | |
3019 | NAME(aout,link_add_symbols) (abfd, info) | |
3020 | bfd *abfd; | |
3021 | struct bfd_link_info *info; | |
3022 | { | |
3023 | switch (bfd_get_format (abfd)) | |
3024 | { | |
3025 | case bfd_object: | |
3026 | return aout_link_add_object_symbols (abfd, info); | |
3027 | case bfd_archive: | |
3028 | return _bfd_generic_link_add_archive_symbols | |
3029 | (abfd, info, aout_link_check_archive_element); | |
3030 | default: | |
3031 | bfd_set_error (bfd_error_wrong_format); | |
3032 | return false; | |
3033 | } | |
3034 | } | |
3035 | ||
3036 | /* Add symbols from an a.out object file. */ | |
3037 | ||
3038 | static boolean | |
3039 | aout_link_add_object_symbols (abfd, info) | |
3040 | bfd *abfd; | |
3041 | struct bfd_link_info *info; | |
3042 | { | |
3043 | if (! aout_get_external_symbols (abfd)) | |
3044 | return false; | |
3045 | if (! aout_link_add_symbols (abfd, info)) | |
3046 | return false; | |
3047 | if (! info->keep_memory) | |
3048 | { | |
3049 | if (! aout_link_free_symbols (abfd)) | |
3050 | return false; | |
3051 | } | |
3052 | return true; | |
3053 | } | |
3054 | ||
3055 | /* Check a single archive element to see if we need to include it in | |
3056 | the link. *PNEEDED is set according to whether this element is | |
3057 | needed in the link or not. This is called from | |
3058 | _bfd_generic_link_add_archive_symbols. */ | |
3059 | ||
3060 | static boolean | |
3061 | aout_link_check_archive_element (abfd, info, pneeded) | |
3062 | bfd *abfd; | |
3063 | struct bfd_link_info *info; | |
3064 | boolean *pneeded; | |
3065 | { | |
3066 | if (! aout_get_external_symbols (abfd)) | |
3067 | return false; | |
3068 | ||
3069 | if (! aout_link_check_ar_symbols (abfd, info, pneeded)) | |
3070 | return false; | |
3071 | ||
3072 | if (*pneeded) | |
3073 | { | |
3074 | if (! aout_link_add_symbols (abfd, info)) | |
3075 | return false; | |
3076 | } | |
3077 | ||
3078 | if (! info->keep_memory || ! *pneeded) | |
3079 | { | |
3080 | if (! aout_link_free_symbols (abfd)) | |
3081 | return false; | |
3082 | } | |
3083 | ||
3084 | return true; | |
3085 | } | |
3086 | ||
3087 | /* Free up the internal symbols read from an a.out file. */ | |
3088 | ||
3089 | static boolean | |
3090 | aout_link_free_symbols (abfd) | |
3091 | bfd *abfd; | |
3092 | { | |
3093 | if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL) | |
3094 | { | |
3095 | #ifdef USE_MMAP | |
3096 | bfd_free_window (&obj_aout_sym_window (abfd)); | |
3097 | #else | |
3098 | free ((PTR) obj_aout_external_syms (abfd)); | |
3099 | #endif | |
3100 | obj_aout_external_syms (abfd) = (struct external_nlist *) NULL; | |
3101 | } | |
3102 | if (obj_aout_external_strings (abfd) != (char *) NULL) | |
3103 | { | |
3104 | #ifdef USE_MMAP | |
3105 | bfd_free_window (&obj_aout_string_window (abfd)); | |
3106 | #else | |
3107 | free ((PTR) obj_aout_external_strings (abfd)); | |
3108 | #endif | |
3109 | obj_aout_external_strings (abfd) = (char *) NULL; | |
3110 | } | |
3111 | return true; | |
3112 | } | |
3113 | ||
3114 | /* Look through the internal symbols to see if this object file should | |
3115 | be included in the link. We should include this object file if it | |
3116 | defines any symbols which are currently undefined. If this object | |
3117 | file defines a common symbol, then we may adjust the size of the | |
3118 | known symbol but we do not include the object file in the link | |
3119 | (unless there is some other reason to include it). */ | |
3120 | ||
3121 | static boolean | |
3122 | aout_link_check_ar_symbols (abfd, info, pneeded) | |
3123 | bfd *abfd; | |
3124 | struct bfd_link_info *info; | |
3125 | boolean *pneeded; | |
3126 | { | |
3127 | register struct external_nlist *p; | |
3128 | struct external_nlist *pend; | |
3129 | char *strings; | |
3130 | ||
3131 | *pneeded = false; | |
3132 | ||
3133 | /* Look through all the symbols. */ | |
3134 | p = obj_aout_external_syms (abfd); | |
3135 | pend = p + obj_aout_external_sym_count (abfd); | |
3136 | strings = obj_aout_external_strings (abfd); | |
3137 | for (; p < pend; p++) | |
3138 | { | |
3139 | int type = bfd_h_get_8 (abfd, p->e_type); | |
3140 | const char *name; | |
3141 | struct bfd_link_hash_entry *h; | |
3142 | ||
3143 | /* Ignore symbols that are not externally visible. This is an | |
3144 | optimization only, as we check the type more thoroughly | |
3145 | below. */ | |
3146 | if (((type & N_EXT) == 0 | |
3147 | || (type & N_STAB) != 0 | |
3148 | || type == N_FN) | |
3149 | && type != N_WEAKA | |
3150 | && type != N_WEAKT | |
3151 | && type != N_WEAKD | |
3152 | && type != N_WEAKB) | |
3153 | { | |
3154 | if (type == N_WARNING | |
3155 | || type == N_INDR) | |
3156 | ++p; | |
3157 | continue; | |
3158 | } | |
3159 | ||
3160 | name = strings + GET_WORD (abfd, p->e_strx); | |
3161 | h = bfd_link_hash_lookup (info->hash, name, false, false, true); | |
3162 | ||
3163 | /* We are only interested in symbols that are currently | |
3164 | undefined or common. */ | |
3165 | if (h == (struct bfd_link_hash_entry *) NULL | |
3166 | || (h->type != bfd_link_hash_undefined | |
3167 | && h->type != bfd_link_hash_common)) | |
3168 | { | |
3169 | if (type == (N_INDR | N_EXT)) | |
3170 | ++p; | |
3171 | continue; | |
3172 | } | |
3173 | ||
3174 | if (type == (N_TEXT | N_EXT) | |
3175 | || type == (N_DATA | N_EXT) | |
3176 | || type == (N_BSS | N_EXT) | |
3177 | || type == (N_ABS | N_EXT) | |
3178 | || type == (N_INDR | N_EXT)) | |
3179 | { | |
3180 | /* This object file defines this symbol. We must link it | |
3181 | in. This is true regardless of whether the current | |
3182 | definition of the symbol is undefined or common. If the | |
3183 | current definition is common, we have a case in which we | |
3184 | have already seen an object file including | |
3185 | int a; | |
3186 | and this object file from the archive includes | |
3187 | int a = 5; | |
3188 | In such a case we must include this object file. | |
3189 | ||
3190 | FIXME: The SunOS 4.1.3 linker will pull in the archive | |
3191 | element if the symbol is defined in the .data section, | |
3192 | but not if it is defined in the .text section. That | |
3193 | seems a bit crazy to me, and I haven't implemented it. | |
3194 | However, it might be correct. */ | |
3195 | if (! (*info->callbacks->add_archive_element) (info, abfd, name)) | |
3196 | return false; | |
3197 | *pneeded = true; | |
3198 | return true; | |
3199 | } | |
3200 | ||
3201 | if (type == (N_UNDF | N_EXT)) | |
3202 | { | |
3203 | bfd_vma value; | |
3204 | ||
3205 | value = GET_WORD (abfd, p->e_value); | |
3206 | if (value != 0) | |
3207 | { | |
3208 | /* This symbol is common in the object from the archive | |
3209 | file. */ | |
3210 | if (h->type == bfd_link_hash_undefined) | |
3211 | { | |
3212 | bfd *symbfd; | |
3213 | unsigned int power; | |
3214 | ||
3215 | symbfd = h->u.undef.abfd; | |
3216 | if (symbfd == (bfd *) NULL) | |
3217 | { | |
3218 | /* This symbol was created as undefined from | |
3219 | outside BFD. We assume that we should link | |
3220 | in the object file. This is done for the -u | |
3221 | option in the linker. */ | |
3222 | if (! (*info->callbacks->add_archive_element) (info, | |
3223 | abfd, | |
3224 | name)) | |
3225 | return false; | |
3226 | *pneeded = true; | |
3227 | return true; | |
3228 | } | |
3229 | /* Turn the current link symbol into a common | |
3230 | symbol. It is already on the undefs list. */ | |
3231 | h->type = bfd_link_hash_common; | |
3232 | h->u.c.p = ((struct bfd_link_hash_common_entry *) | |
3233 | bfd_hash_allocate (&info->hash->table, | |
3234 | sizeof (struct bfd_link_hash_common_entry))); | |
3235 | if (h->u.c.p == NULL) | |
3236 | return false; | |
3237 | ||
3238 | h->u.c.size = value; | |
3239 | ||
3240 | /* FIXME: This isn't quite right. The maximum | |
3241 | alignment of a common symbol should be set by the | |
3242 | architecture of the output file, not of the input | |
3243 | file. */ | |
3244 | power = bfd_log2 (value); | |
3245 | if (power > bfd_get_arch_info (abfd)->section_align_power) | |
3246 | power = bfd_get_arch_info (abfd)->section_align_power; | |
3247 | h->u.c.p->alignment_power = power; | |
3248 | ||
3249 | h->u.c.p->section = bfd_make_section_old_way (symbfd, | |
3250 | "COMMON"); | |
3251 | } | |
3252 | else | |
3253 | { | |
3254 | /* Adjust the size of the common symbol if | |
3255 | necessary. */ | |
3256 | if (value > h->u.c.size) | |
3257 | h->u.c.size = value; | |
3258 | } | |
3259 | } | |
3260 | } | |
3261 | ||
3262 | if (type == N_WEAKA | |
3263 | || type == N_WEAKT | |
3264 | || type == N_WEAKD | |
3265 | || type == N_WEAKB) | |
3266 | { | |
3267 | /* This symbol is weak but defined. We must pull it in if | |
3268 | the current link symbol is undefined, but we don't want | |
3269 | it if the current link symbol is common. */ | |
3270 | if (h->type == bfd_link_hash_undefined) | |
3271 | { | |
3272 | if (! (*info->callbacks->add_archive_element) (info, abfd, name)) | |
3273 | return false; | |
3274 | *pneeded = true; | |
3275 | return true; | |
3276 | } | |
3277 | } | |
3278 | } | |
3279 | ||
3280 | /* We do not need this object file. */ | |
3281 | return true; | |
3282 | } | |
3283 | ||
3284 | /* Add all symbols from an object file to the hash table. */ | |
3285 | ||
3286 | static boolean | |
3287 | aout_link_add_symbols (abfd, info) | |
3288 | bfd *abfd; | |
3289 | struct bfd_link_info *info; | |
3290 | { | |
3291 | boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *, | |
3292 | const char *, flagword, asection *, | |
3293 | bfd_vma, const char *, boolean, | |
3294 | boolean, | |
3295 | struct bfd_link_hash_entry **)); | |
3296 | struct external_nlist *syms; | |
3297 | bfd_size_type sym_count; | |
3298 | char *strings; | |
3299 | boolean copy; | |
3300 | struct aout_link_hash_entry **sym_hash; | |
3301 | register struct external_nlist *p; | |
3302 | struct external_nlist *pend; | |
3303 | ||
3304 | syms = obj_aout_external_syms (abfd); | |
3305 | sym_count = obj_aout_external_sym_count (abfd); | |
3306 | strings = obj_aout_external_strings (abfd); | |
3307 | if (info->keep_memory) | |
3308 | copy = false; | |
3309 | else | |
3310 | copy = true; | |
3311 | ||
3312 | if (aout_backend_info (abfd)->add_dynamic_symbols != NULL) | |
3313 | { | |
3314 | if (! ((*aout_backend_info (abfd)->add_dynamic_symbols) | |
3315 | (abfd, info, &syms, &sym_count, &strings))) | |
3316 | return false; | |
3317 | } | |
3318 | ||
3319 | /* We keep a list of the linker hash table entries that correspond | |
3320 | to particular symbols. We could just look them up in the hash | |
3321 | table, but keeping the list is more efficient. Perhaps this | |
3322 | should be conditional on info->keep_memory. */ | |
3323 | sym_hash = ((struct aout_link_hash_entry **) | |
3324 | bfd_alloc (abfd, | |
3325 | ((size_t) sym_count | |
3326 | * sizeof (struct aout_link_hash_entry *)))); | |
3327 | if (sym_hash == NULL && sym_count != 0) | |
3328 | return false; | |
3329 | obj_aout_sym_hashes (abfd) = sym_hash; | |
3330 | ||
3331 | add_one_symbol = aout_backend_info (abfd)->add_one_symbol; | |
3332 | if (add_one_symbol == NULL) | |
3333 | add_one_symbol = _bfd_generic_link_add_one_symbol; | |
3334 | ||
3335 | p = syms; | |
3336 | pend = p + sym_count; | |
3337 | for (; p < pend; p++, sym_hash++) | |
3338 | { | |
3339 | int type; | |
3340 | const char *name; | |
3341 | bfd_vma value; | |
3342 | asection *section; | |
3343 | flagword flags; | |
3344 | const char *string; | |
3345 | ||
3346 | *sym_hash = NULL; | |
3347 | ||
3348 | type = bfd_h_get_8 (abfd, p->e_type); | |
3349 | ||
3350 | /* Ignore debugging symbols. */ | |
3351 | if ((type & N_STAB) != 0) | |
3352 | continue; | |
3353 | ||
3354 | name = strings + GET_WORD (abfd, p->e_strx); | |
3355 | value = GET_WORD (abfd, p->e_value); | |
3356 | flags = BSF_GLOBAL; | |
3357 | string = NULL; | |
3358 | switch (type) | |
3359 | { | |
3360 | default: | |
3361 | abort (); | |
3362 | ||
3363 | case N_UNDF: | |
3364 | case N_ABS: | |
3365 | case N_TEXT: | |
3366 | case N_DATA: | |
3367 | case N_BSS: | |
3368 | case N_FN_SEQ: | |
3369 | case N_COMM: | |
3370 | case N_SETV: | |
3371 | case N_FN: | |
3372 | /* Ignore symbols that are not externally visible. */ | |
3373 | continue; | |
3374 | case N_INDR: | |
3375 | /* Ignore local indirect symbol. */ | |
3376 | ++p; | |
3377 | ++sym_hash; | |
3378 | continue; | |
3379 | ||
3380 | case N_UNDF | N_EXT: | |
3381 | if (value == 0) | |
3382 | { | |
3383 | section = bfd_und_section_ptr; | |
3384 | flags = 0; | |
3385 | } | |
3386 | else | |
3387 | section = bfd_com_section_ptr; | |
3388 | break; | |
3389 | case N_ABS | N_EXT: | |
3390 | section = bfd_abs_section_ptr; | |
3391 | break; | |
3392 | case N_TEXT | N_EXT: | |
3393 | section = obj_textsec (abfd); | |
3394 | value -= bfd_get_section_vma (abfd, section); | |
3395 | break; | |
3396 | case N_DATA | N_EXT: | |
3397 | case N_SETV | N_EXT: | |
3398 | /* Treat N_SETV symbols as N_DATA symbol; see comment in | |
3399 | translate_from_native_sym_flags. */ | |
3400 | section = obj_datasec (abfd); | |
3401 | value -= bfd_get_section_vma (abfd, section); | |
3402 | break; | |
3403 | case N_BSS | N_EXT: | |
3404 | section = obj_bsssec (abfd); | |
3405 | value -= bfd_get_section_vma (abfd, section); | |
3406 | break; | |
3407 | case N_INDR | N_EXT: | |
3408 | /* An indirect symbol. The next symbol is the symbol | |
3409 | which this one really is. */ | |
3410 | BFD_ASSERT (p + 1 < pend); | |
3411 | ++p; | |
3412 | string = strings + GET_WORD (abfd, p->e_strx); | |
3413 | section = bfd_ind_section_ptr; | |
3414 | flags |= BSF_INDIRECT; | |
3415 | break; | |
3416 | case N_COMM | N_EXT: | |
3417 | section = bfd_com_section_ptr; | |
3418 | break; | |
3419 | case N_SETA: case N_SETA | N_EXT: | |
3420 | section = bfd_abs_section_ptr; | |
3421 | flags |= BSF_CONSTRUCTOR; | |
3422 | break; | |
3423 | case N_SETT: case N_SETT | N_EXT: | |
3424 | section = obj_textsec (abfd); | |
3425 | flags |= BSF_CONSTRUCTOR; | |
3426 | value -= bfd_get_section_vma (abfd, section); | |
3427 | break; | |
3428 | case N_SETD: case N_SETD | N_EXT: | |
3429 | section = obj_datasec (abfd); | |
3430 | flags |= BSF_CONSTRUCTOR; | |
3431 | value -= bfd_get_section_vma (abfd, section); | |
3432 | break; | |
3433 | case N_SETB: case N_SETB | N_EXT: | |
3434 | section = obj_bsssec (abfd); | |
3435 | flags |= BSF_CONSTRUCTOR; | |
3436 | value -= bfd_get_section_vma (abfd, section); | |
3437 | break; | |
3438 | case N_WARNING: | |
3439 | /* A warning symbol. The next symbol is the one to warn | |
3440 | about. */ | |
3441 | BFD_ASSERT (p + 1 < pend); | |
3442 | ++p; | |
3443 | string = name; | |
3444 | name = strings + GET_WORD (abfd, p->e_strx); | |
3445 | section = bfd_und_section_ptr; | |
3446 | flags |= BSF_WARNING; | |
3447 | break; | |
3448 | case N_WEAKU: | |
3449 | section = bfd_und_section_ptr; | |
3450 | flags = BSF_WEAK; | |
3451 | break; | |
3452 | case N_WEAKA: | |
3453 | section = bfd_abs_section_ptr; | |
3454 | flags = BSF_WEAK; | |
3455 | break; | |
3456 | case N_WEAKT: | |
3457 | section = obj_textsec (abfd); | |
3458 | value -= bfd_get_section_vma (abfd, section); | |
3459 | flags = BSF_WEAK; | |
3460 | break; | |
3461 | case N_WEAKD: | |
3462 | section = obj_datasec (abfd); | |
3463 | value -= bfd_get_section_vma (abfd, section); | |
3464 | flags = BSF_WEAK; | |
3465 | break; | |
3466 | case N_WEAKB: | |
3467 | section = obj_bsssec (abfd); | |
3468 | value -= bfd_get_section_vma (abfd, section); | |
3469 | flags = BSF_WEAK; | |
3470 | break; | |
3471 | } | |
3472 | ||
3473 | if (! ((*add_one_symbol) | |
3474 | (info, abfd, name, flags, section, value, string, copy, false, | |
3475 | (struct bfd_link_hash_entry **) sym_hash))) | |
3476 | return false; | |
3477 | ||
3478 | /* Restrict the maximum alignment of a common symbol based on | |
3479 | the architecture, since a.out has no way to represent | |
3480 | alignment requirements of a section in a .o file. FIXME: | |
3481 | This isn't quite right: it should use the architecture of the | |
3482 | output file, not the input files. */ | |
3483 | if ((*sym_hash)->root.type == bfd_link_hash_common | |
3484 | && ((*sym_hash)->root.u.c.p->alignment_power > | |
3485 | bfd_get_arch_info (abfd)->section_align_power)) | |
3486 | (*sym_hash)->root.u.c.p->alignment_power = | |
3487 | bfd_get_arch_info (abfd)->section_align_power; | |
3488 | ||
3489 | /* If this is a set symbol, and we are not building sets, then | |
3490 | it is possible for the hash entry to not have been set. In | |
3491 | such a case, treat the symbol as not globally defined. */ | |
3492 | if ((*sym_hash)->root.type == bfd_link_hash_new) | |
3493 | { | |
3494 | BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0); | |
3495 | *sym_hash = NULL; | |
3496 | } | |
3497 | ||
3498 | if (type == (N_INDR | N_EXT) || type == N_WARNING) | |
3499 | ++sym_hash; | |
3500 | } | |
3501 | ||
3502 | return true; | |
3503 | } | |
3504 | \f | |
3505 | /* A hash table used for header files with N_BINCL entries. */ | |
3506 | ||
3507 | struct aout_link_includes_table | |
3508 | { | |
3509 | struct bfd_hash_table root; | |
3510 | }; | |
3511 | ||
3512 | /* A linked list of totals that we have found for a particular header | |
3513 | file. */ | |
3514 | ||
3515 | struct aout_link_includes_totals | |
3516 | { | |
3517 | struct aout_link_includes_totals *next; | |
3518 | bfd_vma total; | |
3519 | }; | |
3520 | ||
3521 | /* An entry in the header file hash table. */ | |
3522 | ||
3523 | struct aout_link_includes_entry | |
3524 | { | |
3525 | struct bfd_hash_entry root; | |
3526 | /* List of totals we have found for this file. */ | |
3527 | struct aout_link_includes_totals *totals; | |
3528 | }; | |
3529 | ||
3530 | /* Look up an entry in an the header file hash table. */ | |
3531 | ||
3532 | #define aout_link_includes_lookup(table, string, create, copy) \ | |
3533 | ((struct aout_link_includes_entry *) \ | |
3534 | bfd_hash_lookup (&(table)->root, (string), (create), (copy))) | |
3535 | ||
3536 | /* During the final link step we need to pass around a bunch of | |
3537 | information, so we do it in an instance of this structure. */ | |
3538 | ||
3539 | struct aout_final_link_info | |
3540 | { | |
3541 | /* General link information. */ | |
3542 | struct bfd_link_info *info; | |
3543 | /* Output bfd. */ | |
3544 | bfd *output_bfd; | |
3545 | /* Reloc file positions. */ | |
3546 | file_ptr treloff, dreloff; | |
3547 | /* File position of symbols. */ | |
3548 | file_ptr symoff; | |
3549 | /* String table. */ | |
3550 | struct bfd_strtab_hash *strtab; | |
3551 | /* Header file hash table. */ | |
3552 | struct aout_link_includes_table includes; | |
3553 | /* A buffer large enough to hold the contents of any section. */ | |
3554 | bfd_byte *contents; | |
3555 | /* A buffer large enough to hold the relocs of any section. */ | |
3556 | PTR relocs; | |
3557 | /* A buffer large enough to hold the symbol map of any input BFD. */ | |
3558 | int *symbol_map; | |
3559 | /* A buffer large enough to hold output symbols of any input BFD. */ | |
3560 | struct external_nlist *output_syms; | |
3561 | }; | |
3562 | ||
3563 | static struct bfd_hash_entry *aout_link_includes_newfunc | |
3564 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
3565 | static boolean aout_link_input_bfd | |
3566 | PARAMS ((struct aout_final_link_info *, bfd *input_bfd)); | |
3567 | static boolean aout_link_write_symbols | |
3568 | PARAMS ((struct aout_final_link_info *, bfd *input_bfd)); | |
3569 | static boolean aout_link_write_other_symbol | |
3570 | PARAMS ((struct aout_link_hash_entry *, PTR)); | |
3571 | static boolean aout_link_input_section | |
3572 | PARAMS ((struct aout_final_link_info *, bfd *input_bfd, | |
3573 | asection *input_section, file_ptr *reloff_ptr, | |
3574 | bfd_size_type rel_size)); | |
3575 | static boolean aout_link_input_section_std | |
3576 | PARAMS ((struct aout_final_link_info *, bfd *input_bfd, | |
3577 | asection *input_section, struct reloc_std_external *, | |
3578 | bfd_size_type rel_size, bfd_byte *contents)); | |
3579 | static boolean aout_link_input_section_ext | |
3580 | PARAMS ((struct aout_final_link_info *, bfd *input_bfd, | |
3581 | asection *input_section, struct reloc_ext_external *, | |
3582 | bfd_size_type rel_size, bfd_byte *contents)); | |
3583 | static INLINE asection *aout_reloc_index_to_section | |
3584 | PARAMS ((bfd *, int)); | |
3585 | static boolean aout_link_reloc_link_order | |
3586 | PARAMS ((struct aout_final_link_info *, asection *, | |
3587 | struct bfd_link_order *)); | |
3588 | ||
3589 | /* The function to create a new entry in the header file hash table. */ | |
3590 | ||
3591 | static struct bfd_hash_entry * | |
3592 | aout_link_includes_newfunc (entry, table, string) | |
3593 | struct bfd_hash_entry *entry; | |
3594 | struct bfd_hash_table *table; | |
3595 | const char *string; | |
3596 | { | |
3597 | struct aout_link_includes_entry *ret = | |
3598 | (struct aout_link_includes_entry *) entry; | |
3599 | ||
3600 | /* Allocate the structure if it has not already been allocated by a | |
3601 | subclass. */ | |
3602 | if (ret == (struct aout_link_includes_entry *) NULL) | |
3603 | ret = ((struct aout_link_includes_entry *) | |
3604 | bfd_hash_allocate (table, | |
3605 | sizeof (struct aout_link_includes_entry))); | |
3606 | if (ret == (struct aout_link_includes_entry *) NULL) | |
3607 | return (struct bfd_hash_entry *) ret; | |
3608 | ||
3609 | /* Call the allocation method of the superclass. */ | |
3610 | ret = ((struct aout_link_includes_entry *) | |
3611 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); | |
3612 | if (ret) | |
3613 | { | |
3614 | /* Set local fields. */ | |
3615 | ret->totals = NULL; | |
3616 | } | |
3617 | ||
3618 | return (struct bfd_hash_entry *) ret; | |
3619 | } | |
3620 | ||
3621 | /* Do the final link step. This is called on the output BFD. The | |
3622 | INFO structure should point to a list of BFDs linked through the | |
3623 | link_next field which can be used to find each BFD which takes part | |
3624 | in the output. Also, each section in ABFD should point to a list | |
3625 | of bfd_link_order structures which list all the input sections for | |
3626 | the output section. */ | |
3627 | ||
3628 | boolean | |
3629 | NAME(aout,final_link) (abfd, info, callback) | |
3630 | bfd *abfd; | |
3631 | struct bfd_link_info *info; | |
3632 | void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *)); | |
3633 | { | |
3634 | struct aout_final_link_info aout_info; | |
3635 | boolean includes_hash_initialized = false; | |
3636 | register bfd *sub; | |
3637 | bfd_size_type trsize, drsize; | |
3638 | size_t max_contents_size; | |
3639 | size_t max_relocs_size; | |
3640 | size_t max_sym_count; | |
3641 | bfd_size_type text_size; | |
3642 | file_ptr text_end; | |
3643 | register struct bfd_link_order *p; | |
3644 | asection *o; | |
3645 | boolean have_link_order_relocs; | |
3646 | ||
3647 | if (info->shared) | |
3648 | abfd->flags |= DYNAMIC; | |
3649 | ||
3650 | aout_info.info = info; | |
3651 | aout_info.output_bfd = abfd; | |
3652 | aout_info.contents = NULL; | |
3653 | aout_info.relocs = NULL; | |
3654 | aout_info.symbol_map = NULL; | |
3655 | aout_info.output_syms = NULL; | |
3656 | ||
3657 | if (! bfd_hash_table_init_n (&aout_info.includes.root, | |
3658 | aout_link_includes_newfunc, | |
3659 | 251)) | |
3660 | goto error_return; | |
3661 | includes_hash_initialized = true; | |
3662 | ||
3663 | /* Figure out the largest section size. Also, if generating | |
3664 | relocateable output, count the relocs. */ | |
3665 | trsize = 0; | |
3666 | drsize = 0; | |
3667 | max_contents_size = 0; | |
3668 | max_relocs_size = 0; | |
3669 | max_sym_count = 0; | |
3670 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
3671 | { | |
3672 | size_t sz; | |
3673 | ||
3674 | if (info->relocateable) | |
3675 | { | |
3676 | if (bfd_get_flavour (sub) == bfd_target_aout_flavour) | |
3677 | { | |
3678 | trsize += exec_hdr (sub)->a_trsize; | |
3679 | drsize += exec_hdr (sub)->a_drsize; | |
3680 | } | |
3681 | else | |
3682 | { | |
3683 | /* FIXME: We need to identify the .text and .data sections | |
3684 | and call get_reloc_upper_bound and canonicalize_reloc to | |
3685 | work out the number of relocs needed, and then multiply | |
3686 | by the reloc size. */ | |
3687 | (*_bfd_error_handler) | |
3688 | (_("%s: relocateable link from %s to %s not supported"), | |
3689 | bfd_get_filename (abfd), | |
3690 | sub->xvec->name, abfd->xvec->name); | |
3691 | bfd_set_error (bfd_error_invalid_operation); | |
3692 | goto error_return; | |
3693 | } | |
3694 | } | |
3695 | ||
3696 | if (bfd_get_flavour (sub) == bfd_target_aout_flavour) | |
3697 | { | |
3698 | sz = bfd_section_size (sub, obj_textsec (sub)); | |
3699 | if (sz > max_contents_size) | |
3700 | max_contents_size = sz; | |
3701 | sz = bfd_section_size (sub, obj_datasec (sub)); | |
3702 | if (sz > max_contents_size) | |
3703 | max_contents_size = sz; | |
3704 | ||
3705 | sz = exec_hdr (sub)->a_trsize; | |
3706 | if (sz > max_relocs_size) | |
3707 | max_relocs_size = sz; | |
3708 | sz = exec_hdr (sub)->a_drsize; | |
3709 | if (sz > max_relocs_size) | |
3710 | max_relocs_size = sz; | |
3711 | ||
3712 | sz = obj_aout_external_sym_count (sub); | |
3713 | if (sz > max_sym_count) | |
3714 | max_sym_count = sz; | |
3715 | } | |
3716 | } | |
3717 | ||
3718 | if (info->relocateable) | |
3719 | { | |
3720 | if (obj_textsec (abfd) != (asection *) NULL) | |
3721 | trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd) | |
3722 | ->link_order_head) | |
3723 | * obj_reloc_entry_size (abfd)); | |
3724 | if (obj_datasec (abfd) != (asection *) NULL) | |
3725 | drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd) | |
3726 | ->link_order_head) | |
3727 | * obj_reloc_entry_size (abfd)); | |
3728 | } | |
3729 | ||
3730 | exec_hdr (abfd)->a_trsize = trsize; | |
3731 | exec_hdr (abfd)->a_drsize = drsize; | |
3732 | ||
3733 | exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); | |
3734 | ||
3735 | /* Adjust the section sizes and vmas according to the magic number. | |
3736 | This sets a_text, a_data and a_bss in the exec_hdr and sets the | |
3737 | filepos for each section. */ | |
3738 | if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end)) | |
3739 | goto error_return; | |
3740 | ||
3741 | /* The relocation and symbol file positions differ among a.out | |
3742 | targets. We are passed a callback routine from the backend | |
3743 | specific code to handle this. | |
3744 | FIXME: At this point we do not know how much space the symbol | |
3745 | table will require. This will not work for any (nonstandard) | |
3746 | a.out target that needs to know the symbol table size before it | |
3747 | can compute the relocation file positions. This may or may not | |
3748 | be the case for the hp300hpux target, for example. */ | |
3749 | (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff, | |
3750 | &aout_info.symoff); | |
3751 | obj_textsec (abfd)->rel_filepos = aout_info.treloff; | |
3752 | obj_datasec (abfd)->rel_filepos = aout_info.dreloff; | |
3753 | obj_sym_filepos (abfd) = aout_info.symoff; | |
3754 | ||
3755 | /* We keep a count of the symbols as we output them. */ | |
3756 | obj_aout_external_sym_count (abfd) = 0; | |
3757 | ||
3758 | /* We accumulate the string table as we write out the symbols. */ | |
3759 | aout_info.strtab = _bfd_stringtab_init (); | |
3760 | if (aout_info.strtab == NULL) | |
3761 | goto error_return; | |
3762 | ||
3763 | /* Allocate buffers to hold section contents and relocs. */ | |
3764 | aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size); | |
3765 | aout_info.relocs = (PTR) bfd_malloc (max_relocs_size); | |
3766 | aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *)); | |
3767 | aout_info.output_syms = ((struct external_nlist *) | |
3768 | bfd_malloc ((max_sym_count + 1) | |
3769 | * sizeof (struct external_nlist))); | |
3770 | if ((aout_info.contents == NULL && max_contents_size != 0) | |
3771 | || (aout_info.relocs == NULL && max_relocs_size != 0) | |
3772 | || (aout_info.symbol_map == NULL && max_sym_count != 0) | |
3773 | || aout_info.output_syms == NULL) | |
3774 | goto error_return; | |
3775 | ||
3776 | /* If we have a symbol named __DYNAMIC, force it out now. This is | |
3777 | required by SunOS. Doing this here rather than in sunos.c is a | |
3778 | hack, but it's easier than exporting everything which would be | |
3779 | needed. */ | |
3780 | { | |
3781 | struct aout_link_hash_entry *h; | |
3782 | ||
3783 | h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC", | |
3784 | false, false, false); | |
3785 | if (h != NULL) | |
3786 | aout_link_write_other_symbol (h, &aout_info); | |
3787 | } | |
3788 | ||
3789 | /* The most time efficient way to do the link would be to read all | |
3790 | the input object files into memory and then sort out the | |
3791 | information into the output file. Unfortunately, that will | |
3792 | probably use too much memory. Another method would be to step | |
3793 | through everything that composes the text section and write it | |
3794 | out, and then everything that composes the data section and write | |
3795 | it out, and then write out the relocs, and then write out the | |
3796 | symbols. Unfortunately, that requires reading stuff from each | |
3797 | input file several times, and we will not be able to keep all the | |
3798 | input files open simultaneously, and reopening them will be slow. | |
3799 | ||
3800 | What we do is basically process one input file at a time. We do | |
3801 | everything we need to do with an input file once--copy over the | |
3802 | section contents, handle the relocation information, and write | |
3803 | out the symbols--and then we throw away the information we read | |
3804 | from it. This approach requires a lot of lseeks of the output | |
3805 | file, which is unfortunate but still faster than reopening a lot | |
3806 | of files. | |
3807 | ||
3808 | We use the output_has_begun field of the input BFDs to see | |
3809 | whether we have already handled it. */ | |
3810 | for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next) | |
3811 | sub->output_has_begun = false; | |
3812 | ||
3813 | /* Mark all sections which are to be included in the link. This | |
3814 | will normally be every section. We need to do this so that we | |
3815 | can identify any sections which the linker has decided to not | |
3816 | include. */ | |
3817 | for (o = abfd->sections; o != NULL; o = o->next) | |
3818 | { | |
3819 | for (p = o->link_order_head; p != NULL; p = p->next) | |
3820 | { | |
3821 | if (p->type == bfd_indirect_link_order) | |
3822 | p->u.indirect.section->linker_mark = true; | |
3823 | } | |
3824 | } | |
3825 | ||
3826 | have_link_order_relocs = false; | |
3827 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
3828 | { | |
3829 | for (p = o->link_order_head; | |
3830 | p != (struct bfd_link_order *) NULL; | |
3831 | p = p->next) | |
3832 | { | |
3833 | if (p->type == bfd_indirect_link_order | |
3834 | && (bfd_get_flavour (p->u.indirect.section->owner) | |
3835 | == bfd_target_aout_flavour)) | |
3836 | { | |
3837 | bfd *input_bfd; | |
3838 | ||
3839 | input_bfd = p->u.indirect.section->owner; | |
3840 | if (! input_bfd->output_has_begun) | |
3841 | { | |
3842 | if (! aout_link_input_bfd (&aout_info, input_bfd)) | |
3843 | goto error_return; | |
3844 | input_bfd->output_has_begun = true; | |
3845 | } | |
3846 | } | |
3847 | else if (p->type == bfd_section_reloc_link_order | |
3848 | || p->type == bfd_symbol_reloc_link_order) | |
3849 | { | |
3850 | /* These are handled below. */ | |
3851 | have_link_order_relocs = true; | |
3852 | } | |
3853 | else | |
3854 | { | |
3855 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
3856 | goto error_return; | |
3857 | } | |
3858 | } | |
3859 | } | |
3860 | ||
3861 | /* Write out any symbols that we have not already written out. */ | |
3862 | aout_link_hash_traverse (aout_hash_table (info), | |
3863 | aout_link_write_other_symbol, | |
3864 | (PTR) &aout_info); | |
3865 | ||
3866 | /* Now handle any relocs we were asked to create by the linker. | |
3867 | These did not come from any input file. We must do these after | |
3868 | we have written out all the symbols, so that we know the symbol | |
3869 | indices to use. */ | |
3870 | if (have_link_order_relocs) | |
3871 | { | |
3872 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
3873 | { | |
3874 | for (p = o->link_order_head; | |
3875 | p != (struct bfd_link_order *) NULL; | |
3876 | p = p->next) | |
3877 | { | |
3878 | if (p->type == bfd_section_reloc_link_order | |
3879 | || p->type == bfd_symbol_reloc_link_order) | |
3880 | { | |
3881 | if (! aout_link_reloc_link_order (&aout_info, o, p)) | |
3882 | goto error_return; | |
3883 | } | |
3884 | } | |
3885 | } | |
3886 | } | |
3887 | ||
3888 | if (aout_info.contents != NULL) | |
3889 | { | |
3890 | free (aout_info.contents); | |
3891 | aout_info.contents = NULL; | |
3892 | } | |
3893 | if (aout_info.relocs != NULL) | |
3894 | { | |
3895 | free (aout_info.relocs); | |
3896 | aout_info.relocs = NULL; | |
3897 | } | |
3898 | if (aout_info.symbol_map != NULL) | |
3899 | { | |
3900 | free (aout_info.symbol_map); | |
3901 | aout_info.symbol_map = NULL; | |
3902 | } | |
3903 | if (aout_info.output_syms != NULL) | |
3904 | { | |
3905 | free (aout_info.output_syms); | |
3906 | aout_info.output_syms = NULL; | |
3907 | } | |
3908 | if (includes_hash_initialized) | |
3909 | { | |
3910 | bfd_hash_table_free (&aout_info.includes.root); | |
3911 | includes_hash_initialized = false; | |
3912 | } | |
3913 | ||
3914 | /* Finish up any dynamic linking we may be doing. */ | |
3915 | if (aout_backend_info (abfd)->finish_dynamic_link != NULL) | |
3916 | { | |
3917 | if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info)) | |
3918 | goto error_return; | |
3919 | } | |
3920 | ||
3921 | /* Update the header information. */ | |
3922 | abfd->symcount = obj_aout_external_sym_count (abfd); | |
3923 | exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE; | |
3924 | obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms; | |
3925 | obj_textsec (abfd)->reloc_count = | |
3926 | exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd); | |
3927 | obj_datasec (abfd)->reloc_count = | |
3928 | exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd); | |
3929 | ||
3930 | /* Write out the string table, unless there are no symbols. */ | |
3931 | if (abfd->symcount > 0) | |
3932 | { | |
3933 | if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0 | |
3934 | || ! emit_stringtab (abfd, aout_info.strtab)) | |
3935 | goto error_return; | |
3936 | } | |
3937 | else if (obj_textsec (abfd)->reloc_count == 0 | |
3938 | && obj_datasec (abfd)->reloc_count == 0) | |
3939 | { | |
3940 | bfd_byte b; | |
3941 | ||
3942 | b = 0; | |
3943 | if (bfd_seek (abfd, | |
3944 | (obj_datasec (abfd)->filepos | |
3945 | + exec_hdr (abfd)->a_data | |
3946 | - 1), | |
3947 | SEEK_SET) != 0 | |
3948 | || bfd_write (&b, 1, 1, abfd) != 1) | |
3949 | goto error_return; | |
3950 | } | |
3951 | ||
3952 | return true; | |
3953 | ||
3954 | error_return: | |
3955 | if (aout_info.contents != NULL) | |
3956 | free (aout_info.contents); | |
3957 | if (aout_info.relocs != NULL) | |
3958 | free (aout_info.relocs); | |
3959 | if (aout_info.symbol_map != NULL) | |
3960 | free (aout_info.symbol_map); | |
3961 | if (aout_info.output_syms != NULL) | |
3962 | free (aout_info.output_syms); | |
3963 | if (includes_hash_initialized) | |
3964 | bfd_hash_table_free (&aout_info.includes.root); | |
3965 | return false; | |
3966 | } | |
3967 | ||
3968 | /* Link an a.out input BFD into the output file. */ | |
3969 | ||
3970 | static boolean | |
3971 | aout_link_input_bfd (finfo, input_bfd) | |
3972 | struct aout_final_link_info *finfo; | |
3973 | bfd *input_bfd; | |
3974 | { | |
3975 | bfd_size_type sym_count; | |
3976 | ||
3977 | BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object); | |
3978 | ||
3979 | /* If this is a dynamic object, it may need special handling. */ | |
3980 | if ((input_bfd->flags & DYNAMIC) != 0 | |
3981 | && aout_backend_info (input_bfd)->link_dynamic_object != NULL) | |
3982 | { | |
3983 | return ((*aout_backend_info (input_bfd)->link_dynamic_object) | |
3984 | (finfo->info, input_bfd)); | |
3985 | } | |
3986 | ||
3987 | /* Get the symbols. We probably have them already, unless | |
3988 | finfo->info->keep_memory is false. */ | |
3989 | if (! aout_get_external_symbols (input_bfd)) | |
3990 | return false; | |
3991 | ||
3992 | sym_count = obj_aout_external_sym_count (input_bfd); | |
3993 | ||
3994 | /* Write out the symbols and get a map of the new indices. The map | |
3995 | is placed into finfo->symbol_map. */ | |
3996 | if (! aout_link_write_symbols (finfo, input_bfd)) | |
3997 | return false; | |
3998 | ||
3999 | /* Relocate and write out the sections. These functions use the | |
4000 | symbol map created by aout_link_write_symbols. The linker_mark | |
4001 | field will be set if these sections are to be included in the | |
4002 | link, which will normally be the case. */ | |
4003 | if (obj_textsec (input_bfd)->linker_mark) | |
4004 | { | |
4005 | if (! aout_link_input_section (finfo, input_bfd, | |
4006 | obj_textsec (input_bfd), | |
4007 | &finfo->treloff, | |
4008 | exec_hdr (input_bfd)->a_trsize)) | |
4009 | return false; | |
4010 | } | |
4011 | if (obj_datasec (input_bfd)->linker_mark) | |
4012 | { | |
4013 | if (! aout_link_input_section (finfo, input_bfd, | |
4014 | obj_datasec (input_bfd), | |
4015 | &finfo->dreloff, | |
4016 | exec_hdr (input_bfd)->a_drsize)) | |
4017 | return false; | |
4018 | } | |
4019 | ||
4020 | /* If we are not keeping memory, we don't need the symbols any | |
4021 | longer. We still need them if we are keeping memory, because the | |
4022 | strings in the hash table point into them. */ | |
4023 | if (! finfo->info->keep_memory) | |
4024 | { | |
4025 | if (! aout_link_free_symbols (input_bfd)) | |
4026 | return false; | |
4027 | } | |
4028 | ||
4029 | return true; | |
4030 | } | |
4031 | ||
4032 | /* Adjust and write out the symbols for an a.out file. Set the new | |
4033 | symbol indices into a symbol_map. */ | |
4034 | ||
4035 | static boolean | |
4036 | aout_link_write_symbols (finfo, input_bfd) | |
4037 | struct aout_final_link_info *finfo; | |
4038 | bfd *input_bfd; | |
4039 | { | |
4040 | bfd *output_bfd; | |
4041 | bfd_size_type sym_count; | |
4042 | char *strings; | |
4043 | enum bfd_link_strip strip; | |
4044 | enum bfd_link_discard discard; | |
4045 | struct external_nlist *outsym; | |
4046 | bfd_size_type strtab_index; | |
4047 | register struct external_nlist *sym; | |
4048 | struct external_nlist *sym_end; | |
4049 | struct aout_link_hash_entry **sym_hash; | |
4050 | int *symbol_map; | |
4051 | boolean pass; | |
4052 | boolean skip_next; | |
4053 | ||
4054 | output_bfd = finfo->output_bfd; | |
4055 | sym_count = obj_aout_external_sym_count (input_bfd); | |
4056 | strings = obj_aout_external_strings (input_bfd); | |
4057 | strip = finfo->info->strip; | |
4058 | discard = finfo->info->discard; | |
4059 | outsym = finfo->output_syms; | |
4060 | ||
4061 | /* First write out a symbol for this object file, unless we are | |
4062 | discarding such symbols. */ | |
4063 | if (strip != strip_all | |
4064 | && (strip != strip_some | |
4065 | || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename, | |
4066 | false, false) != NULL) | |
4067 | && discard != discard_all) | |
4068 | { | |
4069 | bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type); | |
4070 | bfd_h_put_8 (output_bfd, 0, outsym->e_other); | |
4071 | bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc); | |
4072 | strtab_index = add_to_stringtab (output_bfd, finfo->strtab, | |
4073 | input_bfd->filename, false); | |
4074 | if (strtab_index == (bfd_size_type) -1) | |
4075 | return false; | |
4076 | PUT_WORD (output_bfd, strtab_index, outsym->e_strx); | |
4077 | PUT_WORD (output_bfd, | |
4078 | (bfd_get_section_vma (output_bfd, | |
4079 | obj_textsec (input_bfd)->output_section) | |
4080 | + obj_textsec (input_bfd)->output_offset), | |
4081 | outsym->e_value); | |
4082 | ++obj_aout_external_sym_count (output_bfd); | |
4083 | ++outsym; | |
4084 | } | |
4085 | ||
4086 | pass = false; | |
4087 | skip_next = false; | |
4088 | sym = obj_aout_external_syms (input_bfd); | |
4089 | sym_end = sym + sym_count; | |
4090 | sym_hash = obj_aout_sym_hashes (input_bfd); | |
4091 | symbol_map = finfo->symbol_map; | |
4092 | memset (symbol_map, 0, sym_count * sizeof *symbol_map); | |
4093 | for (; sym < sym_end; sym++, sym_hash++, symbol_map++) | |
4094 | { | |
4095 | const char *name; | |
4096 | int type; | |
4097 | struct aout_link_hash_entry *h; | |
4098 | boolean skip; | |
4099 | asection *symsec; | |
4100 | bfd_vma val = 0; | |
4101 | boolean copy; | |
4102 | ||
4103 | /* We set *symbol_map to 0 above for all symbols. If it has | |
4104 | already been set to -1 for this symbol, it means that we are | |
4105 | discarding it because it appears in a duplicate header file. | |
4106 | See the N_BINCL code below. */ | |
4107 | if (*symbol_map == -1) | |
4108 | continue; | |
4109 | ||
4110 | /* Initialize *symbol_map to -1, which means that the symbol was | |
4111 | not copied into the output file. We will change it later if | |
4112 | we do copy the symbol over. */ | |
4113 | *symbol_map = -1; | |
4114 | ||
4115 | type = bfd_h_get_8 (input_bfd, sym->e_type); | |
4116 | name = strings + GET_WORD (input_bfd, sym->e_strx); | |
4117 | ||
4118 | h = NULL; | |
4119 | ||
4120 | if (pass) | |
4121 | { | |
4122 | /* Pass this symbol through. It is the target of an | |
4123 | indirect or warning symbol. */ | |
4124 | val = GET_WORD (input_bfd, sym->e_value); | |
4125 | pass = false; | |
4126 | } | |
4127 | else if (skip_next) | |
4128 | { | |
4129 | /* Skip this symbol, which is the target of an indirect | |
4130 | symbol that we have changed to no longer be an indirect | |
4131 | symbol. */ | |
4132 | skip_next = false; | |
4133 | continue; | |
4134 | } | |
4135 | else | |
4136 | { | |
4137 | struct aout_link_hash_entry *hresolve; | |
4138 | ||
4139 | /* We have saved the hash table entry for this symbol, if | |
4140 | there is one. Note that we could just look it up again | |
4141 | in the hash table, provided we first check that it is an | |
0ef5a5bd | 4142 | external symbol. */ |
252b5132 RH |
4143 | h = *sym_hash; |
4144 | ||
4145 | /* Use the name from the hash table, in case the symbol was | |
4146 | wrapped. */ | |
4147 | if (h != NULL) | |
4148 | name = h->root.root.string; | |
4149 | ||
4150 | /* If this is an indirect or warning symbol, then change | |
4151 | hresolve to the base symbol. We also change *sym_hash so | |
4152 | that the relocation routines relocate against the real | |
4153 | symbol. */ | |
4154 | hresolve = h; | |
4155 | if (h != (struct aout_link_hash_entry *) NULL | |
4156 | && (h->root.type == bfd_link_hash_indirect | |
4157 | || h->root.type == bfd_link_hash_warning)) | |
4158 | { | |
4159 | hresolve = (struct aout_link_hash_entry *) h->root.u.i.link; | |
4160 | while (hresolve->root.type == bfd_link_hash_indirect | |
4161 | || hresolve->root.type == bfd_link_hash_warning) | |
4162 | hresolve = ((struct aout_link_hash_entry *) | |
4163 | hresolve->root.u.i.link); | |
4164 | *sym_hash = hresolve; | |
4165 | } | |
4166 | ||
4167 | /* If the symbol has already been written out, skip it. */ | |
4168 | if (h != (struct aout_link_hash_entry *) NULL | |
4169 | && h->root.type != bfd_link_hash_warning | |
4170 | && h->written) | |
4171 | { | |
4172 | if ((type & N_TYPE) == N_INDR | |
4173 | || type == N_WARNING) | |
4174 | skip_next = true; | |
4175 | *symbol_map = h->indx; | |
4176 | continue; | |
4177 | } | |
4178 | ||
4179 | /* See if we are stripping this symbol. */ | |
4180 | skip = false; | |
4181 | switch (strip) | |
4182 | { | |
4183 | case strip_none: | |
4184 | break; | |
4185 | case strip_debugger: | |
4186 | if ((type & N_STAB) != 0) | |
4187 | skip = true; | |
4188 | break; | |
4189 | case strip_some: | |
4190 | if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) | |
4191 | == NULL) | |
4192 | skip = true; | |
4193 | break; | |
4194 | case strip_all: | |
4195 | skip = true; | |
4196 | break; | |
4197 | } | |
4198 | if (skip) | |
4199 | { | |
4200 | if (h != (struct aout_link_hash_entry *) NULL) | |
4201 | h->written = true; | |
4202 | continue; | |
4203 | } | |
4204 | ||
4205 | /* Get the value of the symbol. */ | |
4206 | if ((type & N_TYPE) == N_TEXT | |
4207 | || type == N_WEAKT) | |
4208 | symsec = obj_textsec (input_bfd); | |
4209 | else if ((type & N_TYPE) == N_DATA | |
4210 | || type == N_WEAKD) | |
4211 | symsec = obj_datasec (input_bfd); | |
4212 | else if ((type & N_TYPE) == N_BSS | |
4213 | || type == N_WEAKB) | |
4214 | symsec = obj_bsssec (input_bfd); | |
4215 | else if ((type & N_TYPE) == N_ABS | |
4216 | || type == N_WEAKA) | |
4217 | symsec = bfd_abs_section_ptr; | |
4218 | else if (((type & N_TYPE) == N_INDR | |
4219 | && (hresolve == (struct aout_link_hash_entry *) NULL | |
4220 | || (hresolve->root.type != bfd_link_hash_defined | |
4221 | && hresolve->root.type != bfd_link_hash_defweak | |
4222 | && hresolve->root.type != bfd_link_hash_common))) | |
4223 | || type == N_WARNING) | |
4224 | { | |
4225 | /* Pass the next symbol through unchanged. The | |
4226 | condition above for indirect symbols is so that if | |
4227 | the indirect symbol was defined, we output it with | |
4228 | the correct definition so the debugger will | |
4229 | understand it. */ | |
4230 | pass = true; | |
4231 | val = GET_WORD (input_bfd, sym->e_value); | |
4232 | symsec = NULL; | |
4233 | } | |
4234 | else if ((type & N_STAB) != 0) | |
4235 | { | |
4236 | val = GET_WORD (input_bfd, sym->e_value); | |
4237 | symsec = NULL; | |
4238 | } | |
4239 | else | |
4240 | { | |
4241 | /* If we get here with an indirect symbol, it means that | |
4242 | we are outputting it with a real definition. In such | |
4243 | a case we do not want to output the next symbol, | |
4244 | which is the target of the indirection. */ | |
4245 | if ((type & N_TYPE) == N_INDR) | |
4246 | skip_next = true; | |
4247 | ||
4248 | symsec = NULL; | |
4249 | ||
4250 | /* We need to get the value from the hash table. We use | |
4251 | hresolve so that if we have defined an indirect | |
4252 | symbol we output the final definition. */ | |
4253 | if (h == (struct aout_link_hash_entry *) NULL) | |
4254 | { | |
4255 | switch (type & N_TYPE) | |
4256 | { | |
4257 | case N_SETT: | |
4258 | symsec = obj_textsec (input_bfd); | |
4259 | break; | |
4260 | case N_SETD: | |
4261 | symsec = obj_datasec (input_bfd); | |
4262 | break; | |
4263 | case N_SETB: | |
4264 | symsec = obj_bsssec (input_bfd); | |
4265 | break; | |
4266 | case N_SETA: | |
4267 | symsec = bfd_abs_section_ptr; | |
4268 | break; | |
4269 | default: | |
4270 | val = 0; | |
4271 | break; | |
4272 | } | |
4273 | } | |
4274 | else if (hresolve->root.type == bfd_link_hash_defined | |
4275 | || hresolve->root.type == bfd_link_hash_defweak) | |
4276 | { | |
4277 | asection *input_section; | |
4278 | asection *output_section; | |
4279 | ||
4280 | /* This case usually means a common symbol which was | |
4281 | turned into a defined symbol. */ | |
4282 | input_section = hresolve->root.u.def.section; | |
4283 | output_section = input_section->output_section; | |
4284 | BFD_ASSERT (bfd_is_abs_section (output_section) | |
4285 | || output_section->owner == output_bfd); | |
4286 | val = (hresolve->root.u.def.value | |
4287 | + bfd_get_section_vma (output_bfd, output_section) | |
4288 | + input_section->output_offset); | |
4289 | ||
4290 | /* Get the correct type based on the section. If | |
4291 | this is a constructed set, force it to be | |
4292 | globally visible. */ | |
4293 | if (type == N_SETT | |
4294 | || type == N_SETD | |
4295 | || type == N_SETB | |
4296 | || type == N_SETA) | |
4297 | type |= N_EXT; | |
4298 | ||
4299 | type &=~ N_TYPE; | |
4300 | ||
4301 | if (output_section == obj_textsec (output_bfd)) | |
4302 | type |= (hresolve->root.type == bfd_link_hash_defined | |
4303 | ? N_TEXT | |
4304 | : N_WEAKT); | |
4305 | else if (output_section == obj_datasec (output_bfd)) | |
4306 | type |= (hresolve->root.type == bfd_link_hash_defined | |
4307 | ? N_DATA | |
4308 | : N_WEAKD); | |
4309 | else if (output_section == obj_bsssec (output_bfd)) | |
4310 | type |= (hresolve->root.type == bfd_link_hash_defined | |
4311 | ? N_BSS | |
4312 | : N_WEAKB); | |
4313 | else | |
4314 | type |= (hresolve->root.type == bfd_link_hash_defined | |
4315 | ? N_ABS | |
4316 | : N_WEAKA); | |
4317 | } | |
4318 | else if (hresolve->root.type == bfd_link_hash_common) | |
4319 | val = hresolve->root.u.c.size; | |
4320 | else if (hresolve->root.type == bfd_link_hash_undefweak) | |
4321 | { | |
4322 | val = 0; | |
4323 | type = N_WEAKU; | |
4324 | } | |
4325 | else | |
4326 | val = 0; | |
4327 | } | |
4328 | if (symsec != (asection *) NULL) | |
4329 | val = (symsec->output_section->vma | |
4330 | + symsec->output_offset | |
4331 | + (GET_WORD (input_bfd, sym->e_value) | |
4332 | - symsec->vma)); | |
4333 | ||
4334 | /* If this is a global symbol set the written flag, and if | |
4335 | it is a local symbol see if we should discard it. */ | |
4336 | if (h != (struct aout_link_hash_entry *) NULL) | |
4337 | { | |
4338 | h->written = true; | |
4339 | h->indx = obj_aout_external_sym_count (output_bfd); | |
4340 | } | |
4341 | else if ((type & N_TYPE) != N_SETT | |
4342 | && (type & N_TYPE) != N_SETD | |
4343 | && (type & N_TYPE) != N_SETB | |
4344 | && (type & N_TYPE) != N_SETA) | |
4345 | { | |
4346 | switch (discard) | |
4347 | { | |
4348 | case discard_none: | |
f5fa8ca2 | 4349 | case discard_sec_merge: |
252b5132 RH |
4350 | break; |
4351 | case discard_l: | |
4352 | if ((type & N_STAB) == 0 | |
4353 | && bfd_is_local_label_name (input_bfd, name)) | |
4354 | skip = true; | |
4355 | break; | |
4356 | case discard_all: | |
4357 | skip = true; | |
4358 | break; | |
4359 | } | |
4360 | if (skip) | |
4361 | { | |
4362 | pass = false; | |
4363 | continue; | |
4364 | } | |
4365 | } | |
4366 | ||
4367 | /* An N_BINCL symbol indicates the start of the stabs | |
4368 | entries for a header file. We need to scan ahead to the | |
4369 | next N_EINCL symbol, ignoring nesting, adding up all the | |
4370 | characters in the symbol names, not including the file | |
4371 | numbers in types (the first number after an open | |
4372 | parenthesis). */ | |
4373 | if (type == N_BINCL) | |
4374 | { | |
4375 | struct external_nlist *incl_sym; | |
4376 | int nest; | |
4377 | struct aout_link_includes_entry *incl_entry; | |
4378 | struct aout_link_includes_totals *t; | |
4379 | ||
4380 | val = 0; | |
4381 | nest = 0; | |
4382 | for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++) | |
4383 | { | |
4384 | int incl_type; | |
4385 | ||
4386 | incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type); | |
4387 | if (incl_type == N_EINCL) | |
4388 | { | |
4389 | if (nest == 0) | |
4390 | break; | |
4391 | --nest; | |
4392 | } | |
4393 | else if (incl_type == N_BINCL) | |
4394 | ++nest; | |
4395 | else if (nest == 0) | |
4396 | { | |
4397 | const char *s; | |
4398 | ||
4399 | s = strings + GET_WORD (input_bfd, incl_sym->e_strx); | |
4400 | for (; *s != '\0'; s++) | |
4401 | { | |
4402 | val += *s; | |
4403 | if (*s == '(') | |
4404 | { | |
4405 | /* Skip the file number. */ | |
4406 | ++s; | |
4407 | while (isdigit ((unsigned char) *s)) | |
4408 | ++s; | |
4409 | --s; | |
4410 | } | |
4411 | } | |
4412 | } | |
4413 | } | |
4414 | ||
4415 | /* If we have already included a header file with the | |
4416 | same value, then replace this one with an N_EXCL | |
4417 | symbol. */ | |
4418 | copy = ! finfo->info->keep_memory; | |
4419 | incl_entry = aout_link_includes_lookup (&finfo->includes, | |
4420 | name, true, copy); | |
4421 | if (incl_entry == NULL) | |
4422 | return false; | |
4423 | for (t = incl_entry->totals; t != NULL; t = t->next) | |
4424 | if (t->total == val) | |
4425 | break; | |
4426 | if (t == NULL) | |
4427 | { | |
4428 | /* This is the first time we have seen this header | |
4429 | file with this set of stabs strings. */ | |
4430 | t = ((struct aout_link_includes_totals *) | |
4431 | bfd_hash_allocate (&finfo->includes.root, | |
4432 | sizeof *t)); | |
4433 | if (t == NULL) | |
4434 | return false; | |
4435 | t->total = val; | |
4436 | t->next = incl_entry->totals; | |
4437 | incl_entry->totals = t; | |
4438 | } | |
4439 | else | |
4440 | { | |
4441 | int *incl_map; | |
4442 | ||
4443 | /* This is a duplicate header file. We must change | |
4444 | it to be an N_EXCL entry, and mark all the | |
4445 | included symbols to prevent outputting them. */ | |
4446 | type = N_EXCL; | |
4447 | ||
4448 | nest = 0; | |
4449 | for (incl_sym = sym + 1, incl_map = symbol_map + 1; | |
4450 | incl_sym < sym_end; | |
4451 | incl_sym++, incl_map++) | |
4452 | { | |
4453 | int incl_type; | |
4454 | ||
4455 | incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type); | |
4456 | if (incl_type == N_EINCL) | |
4457 | { | |
4458 | if (nest == 0) | |
4459 | { | |
4460 | *incl_map = -1; | |
4461 | break; | |
4462 | } | |
4463 | --nest; | |
4464 | } | |
4465 | else if (incl_type == N_BINCL) | |
4466 | ++nest; | |
4467 | else if (nest == 0) | |
4468 | *incl_map = -1; | |
4469 | } | |
4470 | } | |
4471 | } | |
4472 | } | |
4473 | ||
4474 | /* Copy this symbol into the list of symbols we are going to | |
4475 | write out. */ | |
4476 | bfd_h_put_8 (output_bfd, type, outsym->e_type); | |
4477 | bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other), | |
4478 | outsym->e_other); | |
4479 | bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc), | |
4480 | outsym->e_desc); | |
4481 | copy = false; | |
4482 | if (! finfo->info->keep_memory) | |
4483 | { | |
4484 | /* name points into a string table which we are going to | |
4485 | free. If there is a hash table entry, use that string. | |
4486 | Otherwise, copy name into memory. */ | |
4487 | if (h != (struct aout_link_hash_entry *) NULL) | |
4488 | name = h->root.root.string; | |
4489 | else | |
4490 | copy = true; | |
4491 | } | |
4492 | strtab_index = add_to_stringtab (output_bfd, finfo->strtab, | |
4493 | name, copy); | |
4494 | if (strtab_index == (bfd_size_type) -1) | |
4495 | return false; | |
4496 | PUT_WORD (output_bfd, strtab_index, outsym->e_strx); | |
4497 | PUT_WORD (output_bfd, val, outsym->e_value); | |
4498 | *symbol_map = obj_aout_external_sym_count (output_bfd); | |
4499 | ++obj_aout_external_sym_count (output_bfd); | |
4500 | ++outsym; | |
4501 | } | |
4502 | ||
4503 | /* Write out the output symbols we have just constructed. */ | |
4504 | if (outsym > finfo->output_syms) | |
4505 | { | |
4506 | bfd_size_type outsym_count; | |
4507 | ||
4508 | if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0) | |
4509 | return false; | |
4510 | outsym_count = outsym - finfo->output_syms; | |
4511 | if (bfd_write ((PTR) finfo->output_syms, | |
4512 | (bfd_size_type) EXTERNAL_NLIST_SIZE, | |
4513 | (bfd_size_type) outsym_count, output_bfd) | |
4514 | != outsym_count * EXTERNAL_NLIST_SIZE) | |
4515 | return false; | |
4516 | finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE; | |
4517 | } | |
4518 | ||
4519 | return true; | |
4520 | } | |
4521 | ||
4522 | /* Write out a symbol that was not associated with an a.out input | |
4523 | object. */ | |
4524 | ||
4525 | static boolean | |
4526 | aout_link_write_other_symbol (h, data) | |
4527 | struct aout_link_hash_entry *h; | |
4528 | PTR data; | |
4529 | { | |
4530 | struct aout_final_link_info *finfo = (struct aout_final_link_info *) data; | |
4531 | bfd *output_bfd; | |
4532 | int type; | |
4533 | bfd_vma val; | |
4534 | struct external_nlist outsym; | |
4535 | bfd_size_type indx; | |
4536 | ||
4537 | output_bfd = finfo->output_bfd; | |
4538 | ||
4539 | if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL) | |
4540 | { | |
4541 | if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol) | |
4542 | (output_bfd, finfo->info, h))) | |
4543 | { | |
4544 | /* FIXME: No way to handle errors. */ | |
4545 | abort (); | |
4546 | } | |
4547 | } | |
4548 | ||
4549 | if (h->written) | |
4550 | return true; | |
4551 | ||
4552 | h->written = true; | |
4553 | ||
4554 | /* An indx of -2 means the symbol must be written. */ | |
4555 | if (h->indx != -2 | |
4556 | && (finfo->info->strip == strip_all | |
4557 | || (finfo->info->strip == strip_some | |
4558 | && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string, | |
4559 | false, false) == NULL))) | |
4560 | return true; | |
4561 | ||
4562 | switch (h->root.type) | |
4563 | { | |
4564 | default: | |
4565 | abort (); | |
4566 | /* Avoid variable not initialized warnings. */ | |
4567 | return true; | |
4568 | case bfd_link_hash_new: | |
4569 | /* This can happen for set symbols when sets are not being | |
4570 | built. */ | |
4571 | return true; | |
4572 | case bfd_link_hash_undefined: | |
4573 | type = N_UNDF | N_EXT; | |
4574 | val = 0; | |
4575 | break; | |
4576 | case bfd_link_hash_defined: | |
4577 | case bfd_link_hash_defweak: | |
4578 | { | |
4579 | asection *sec; | |
4580 | ||
4581 | sec = h->root.u.def.section->output_section; | |
4582 | BFD_ASSERT (bfd_is_abs_section (sec) | |
4583 | || sec->owner == output_bfd); | |
4584 | if (sec == obj_textsec (output_bfd)) | |
4585 | type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT; | |
4586 | else if (sec == obj_datasec (output_bfd)) | |
4587 | type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD; | |
4588 | else if (sec == obj_bsssec (output_bfd)) | |
4589 | type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB; | |
4590 | else | |
4591 | type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA; | |
4592 | type |= N_EXT; | |
4593 | val = (h->root.u.def.value | |
4594 | + sec->vma | |
4595 | + h->root.u.def.section->output_offset); | |
4596 | } | |
4597 | break; | |
4598 | case bfd_link_hash_common: | |
4599 | type = N_UNDF | N_EXT; | |
4600 | val = h->root.u.c.size; | |
4601 | break; | |
4602 | case bfd_link_hash_undefweak: | |
4603 | type = N_WEAKU; | |
4604 | val = 0; | |
4605 | case bfd_link_hash_indirect: | |
4606 | case bfd_link_hash_warning: | |
4607 | /* FIXME: Ignore these for now. The circumstances under which | |
4608 | they should be written out are not clear to me. */ | |
4609 | return true; | |
4610 | } | |
4611 | ||
4612 | bfd_h_put_8 (output_bfd, type, outsym.e_type); | |
4613 | bfd_h_put_8 (output_bfd, 0, outsym.e_other); | |
4614 | bfd_h_put_16 (output_bfd, 0, outsym.e_desc); | |
4615 | indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string, | |
4616 | false); | |
4617 | if (indx == (bfd_size_type) -1) | |
4618 | { | |
4619 | /* FIXME: No way to handle errors. */ | |
4620 | abort (); | |
4621 | } | |
4622 | PUT_WORD (output_bfd, indx, outsym.e_strx); | |
4623 | PUT_WORD (output_bfd, val, outsym.e_value); | |
4624 | ||
4625 | if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0 | |
4626 | || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE, | |
4627 | (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE) | |
4628 | { | |
4629 | /* FIXME: No way to handle errors. */ | |
4630 | abort (); | |
4631 | } | |
4632 | ||
4633 | finfo->symoff += EXTERNAL_NLIST_SIZE; | |
4634 | h->indx = obj_aout_external_sym_count (output_bfd); | |
4635 | ++obj_aout_external_sym_count (output_bfd); | |
4636 | ||
4637 | return true; | |
4638 | } | |
4639 | ||
4640 | /* Link an a.out section into the output file. */ | |
4641 | ||
4642 | static boolean | |
4643 | aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr, | |
4644 | rel_size) | |
4645 | struct aout_final_link_info *finfo; | |
4646 | bfd *input_bfd; | |
4647 | asection *input_section; | |
4648 | file_ptr *reloff_ptr; | |
4649 | bfd_size_type rel_size; | |
4650 | { | |
4651 | bfd_size_type input_size; | |
4652 | PTR relocs; | |
4653 | ||
4654 | /* Get the section contents. */ | |
4655 | input_size = bfd_section_size (input_bfd, input_section); | |
4656 | if (! bfd_get_section_contents (input_bfd, input_section, | |
4657 | (PTR) finfo->contents, | |
4658 | (file_ptr) 0, input_size)) | |
4659 | return false; | |
4660 | ||
4661 | /* Read in the relocs if we haven't already done it. */ | |
4662 | if (aout_section_data (input_section) != NULL | |
4663 | && aout_section_data (input_section)->relocs != NULL) | |
4664 | relocs = aout_section_data (input_section)->relocs; | |
4665 | else | |
4666 | { | |
4667 | relocs = finfo->relocs; | |
4668 | if (rel_size > 0) | |
4669 | { | |
4670 | if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0 | |
4671 | || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size) | |
4672 | return false; | |
4673 | } | |
4674 | } | |
4675 | ||
4676 | /* Relocate the section contents. */ | |
4677 | if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE) | |
4678 | { | |
4679 | if (! aout_link_input_section_std (finfo, input_bfd, input_section, | |
4680 | (struct reloc_std_external *) relocs, | |
4681 | rel_size, finfo->contents)) | |
4682 | return false; | |
4683 | } | |
4684 | else | |
4685 | { | |
4686 | if (! aout_link_input_section_ext (finfo, input_bfd, input_section, | |
4687 | (struct reloc_ext_external *) relocs, | |
4688 | rel_size, finfo->contents)) | |
4689 | return false; | |
4690 | } | |
4691 | ||
4692 | /* Write out the section contents. */ | |
4693 | if (! bfd_set_section_contents (finfo->output_bfd, | |
4694 | input_section->output_section, | |
4695 | (PTR) finfo->contents, | |
4696 | input_section->output_offset, | |
4697 | input_size)) | |
4698 | return false; | |
4699 | ||
4700 | /* If we are producing relocateable output, the relocs were | |
4701 | modified, and we now write them out. */ | |
4702 | if (finfo->info->relocateable && rel_size > 0) | |
4703 | { | |
4704 | if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0) | |
4705 | return false; | |
4706 | if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd) | |
4707 | != rel_size) | |
4708 | return false; | |
4709 | *reloff_ptr += rel_size; | |
4710 | ||
4711 | /* Assert that the relocs have not run into the symbols, and | |
4712 | that if these are the text relocs they have not run into the | |
4713 | data relocs. */ | |
4714 | BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) | |
4715 | && (reloff_ptr != &finfo->treloff | |
4716 | || (*reloff_ptr | |
4717 | <= obj_datasec (finfo->output_bfd)->rel_filepos))); | |
4718 | } | |
4719 | ||
4720 | return true; | |
4721 | } | |
4722 | ||
4723 | /* Get the section corresponding to a reloc index. */ | |
4724 | ||
4725 | static INLINE asection * | |
4726 | aout_reloc_index_to_section (abfd, indx) | |
4727 | bfd *abfd; | |
4728 | int indx; | |
4729 | { | |
4730 | switch (indx & N_TYPE) | |
4731 | { | |
4732 | case N_TEXT: | |
4733 | return obj_textsec (abfd); | |
4734 | case N_DATA: | |
4735 | return obj_datasec (abfd); | |
4736 | case N_BSS: | |
4737 | return obj_bsssec (abfd); | |
4738 | case N_ABS: | |
4739 | case N_UNDF: | |
4740 | return bfd_abs_section_ptr; | |
4741 | default: | |
4742 | abort (); | |
4743 | } | |
7442e600 ILT |
4744 | /*NOTREACHED*/ |
4745 | return NULL; | |
252b5132 RH |
4746 | } |
4747 | ||
4748 | /* Relocate an a.out section using standard a.out relocs. */ | |
4749 | ||
4750 | static boolean | |
4751 | aout_link_input_section_std (finfo, input_bfd, input_section, relocs, | |
4752 | rel_size, contents) | |
4753 | struct aout_final_link_info *finfo; | |
4754 | bfd *input_bfd; | |
4755 | asection *input_section; | |
4756 | struct reloc_std_external *relocs; | |
4757 | bfd_size_type rel_size; | |
4758 | bfd_byte *contents; | |
4759 | { | |
4760 | boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *, | |
4761 | bfd *, asection *, | |
4762 | struct aout_link_hash_entry *, | |
4763 | PTR, bfd_byte *, boolean *, | |
4764 | bfd_vma *)); | |
4765 | bfd *output_bfd; | |
4766 | boolean relocateable; | |
4767 | struct external_nlist *syms; | |
4768 | char *strings; | |
4769 | struct aout_link_hash_entry **sym_hashes; | |
4770 | int *symbol_map; | |
4771 | bfd_size_type reloc_count; | |
4772 | register struct reloc_std_external *rel; | |
4773 | struct reloc_std_external *rel_end; | |
4774 | ||
4775 | output_bfd = finfo->output_bfd; | |
4776 | check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; | |
4777 | ||
4778 | BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE); | |
4779 | BFD_ASSERT (input_bfd->xvec->header_byteorder | |
4780 | == output_bfd->xvec->header_byteorder); | |
4781 | ||
4782 | relocateable = finfo->info->relocateable; | |
4783 | syms = obj_aout_external_syms (input_bfd); | |
4784 | strings = obj_aout_external_strings (input_bfd); | |
4785 | sym_hashes = obj_aout_sym_hashes (input_bfd); | |
4786 | symbol_map = finfo->symbol_map; | |
4787 | ||
4788 | reloc_count = rel_size / RELOC_STD_SIZE; | |
4789 | rel = relocs; | |
4790 | rel_end = rel + reloc_count; | |
4791 | for (; rel < rel_end; rel++) | |
4792 | { | |
4793 | bfd_vma r_addr; | |
4794 | int r_index; | |
4795 | int r_extern; | |
4796 | int r_pcrel; | |
4797 | int r_baserel = 0; | |
4798 | reloc_howto_type *howto; | |
4799 | struct aout_link_hash_entry *h = NULL; | |
4800 | bfd_vma relocation; | |
4801 | bfd_reloc_status_type r; | |
4802 | ||
4803 | r_addr = GET_SWORD (input_bfd, rel->r_address); | |
4804 | ||
4805 | #ifdef MY_reloc_howto | |
4806 | howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel); | |
0ef5a5bd | 4807 | #else |
252b5132 RH |
4808 | { |
4809 | int r_jmptable; | |
4810 | int r_relative; | |
4811 | int r_length; | |
4812 | unsigned int howto_idx; | |
4813 | ||
4814 | if (bfd_header_big_endian (input_bfd)) | |
4815 | { | |
4816 | r_index = ((rel->r_index[0] << 16) | |
4817 | | (rel->r_index[1] << 8) | |
4818 | | rel->r_index[2]); | |
4819 | r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG)); | |
4820 | r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG)); | |
4821 | r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG)); | |
4822 | r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG)); | |
4823 | r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG)); | |
4824 | r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG) | |
4825 | >> RELOC_STD_BITS_LENGTH_SH_BIG); | |
4826 | } | |
4827 | else | |
4828 | { | |
4829 | r_index = ((rel->r_index[2] << 16) | |
4830 | | (rel->r_index[1] << 8) | |
4831 | | rel->r_index[0]); | |
4832 | r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); | |
4833 | r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); | |
4834 | r_baserel = (0 != (rel->r_type[0] | |
4835 | & RELOC_STD_BITS_BASEREL_LITTLE)); | |
4836 | r_jmptable= (0 != (rel->r_type[0] | |
4837 | & RELOC_STD_BITS_JMPTABLE_LITTLE)); | |
4838 | r_relative= (0 != (rel->r_type[0] | |
4839 | & RELOC_STD_BITS_RELATIVE_LITTLE)); | |
4840 | r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) | |
4841 | >> RELOC_STD_BITS_LENGTH_SH_LITTLE); | |
4842 | } | |
4843 | ||
4844 | howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel | |
4845 | + 16 * r_jmptable + 32 * r_relative); | |
4846 | BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std)); | |
4847 | howto = howto_table_std + howto_idx; | |
4848 | } | |
4849 | #endif | |
4850 | ||
4851 | if (relocateable) | |
4852 | { | |
4853 | /* We are generating a relocateable output file, and must | |
4854 | modify the reloc accordingly. */ | |
4855 | if (r_extern) | |
4856 | { | |
4857 | /* If we know the symbol this relocation is against, | |
4858 | convert it into a relocation against a section. This | |
4859 | is what the native linker does. */ | |
4860 | h = sym_hashes[r_index]; | |
4861 | if (h != (struct aout_link_hash_entry *) NULL | |
4862 | && (h->root.type == bfd_link_hash_defined | |
4863 | || h->root.type == bfd_link_hash_defweak)) | |
4864 | { | |
4865 | asection *output_section; | |
4866 | ||
4867 | /* Change the r_extern value. */ | |
4868 | if (bfd_header_big_endian (output_bfd)) | |
4869 | rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG; | |
4870 | else | |
4871 | rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE; | |
4872 | ||
4873 | /* Compute a new r_index. */ | |
4874 | output_section = h->root.u.def.section->output_section; | |
4875 | if (output_section == obj_textsec (output_bfd)) | |
4876 | r_index = N_TEXT; | |
4877 | else if (output_section == obj_datasec (output_bfd)) | |
4878 | r_index = N_DATA; | |
4879 | else if (output_section == obj_bsssec (output_bfd)) | |
4880 | r_index = N_BSS; | |
4881 | else | |
4882 | r_index = N_ABS; | |
4883 | ||
4884 | /* Add the symbol value and the section VMA to the | |
4885 | addend stored in the contents. */ | |
4886 | relocation = (h->root.u.def.value | |
4887 | + output_section->vma | |
4888 | + h->root.u.def.section->output_offset); | |
4889 | } | |
4890 | else | |
4891 | { | |
4892 | /* We must change r_index according to the symbol | |
4893 | map. */ | |
4894 | r_index = symbol_map[r_index]; | |
4895 | ||
4896 | if (r_index == -1) | |
4897 | { | |
4898 | if (h != NULL) | |
4899 | { | |
4900 | /* We decided to strip this symbol, but it | |
4901 | turns out that we can't. Note that we | |
4902 | lose the other and desc information here. | |
4903 | I don't think that will ever matter for a | |
4904 | global symbol. */ | |
4905 | if (h->indx < 0) | |
4906 | { | |
4907 | h->indx = -2; | |
4908 | h->written = false; | |
4909 | if (! aout_link_write_other_symbol (h, | |
4910 | (PTR) finfo)) | |
4911 | return false; | |
4912 | } | |
4913 | r_index = h->indx; | |
4914 | } | |
4915 | else | |
4916 | { | |
4917 | const char *name; | |
4918 | ||
4919 | name = strings + GET_WORD (input_bfd, | |
4920 | syms[r_index].e_strx); | |
4921 | if (! ((*finfo->info->callbacks->unattached_reloc) | |
4922 | (finfo->info, name, input_bfd, input_section, | |
4923 | r_addr))) | |
4924 | return false; | |
4925 | r_index = 0; | |
4926 | } | |
4927 | } | |
4928 | ||
4929 | relocation = 0; | |
4930 | } | |
4931 | ||
4932 | /* Write out the new r_index value. */ | |
4933 | if (bfd_header_big_endian (output_bfd)) | |
4934 | { | |
4935 | rel->r_index[0] = r_index >> 16; | |
4936 | rel->r_index[1] = r_index >> 8; | |
4937 | rel->r_index[2] = r_index; | |
4938 | } | |
4939 | else | |
4940 | { | |
4941 | rel->r_index[2] = r_index >> 16; | |
4942 | rel->r_index[1] = r_index >> 8; | |
4943 | rel->r_index[0] = r_index; | |
4944 | } | |
4945 | } | |
4946 | else | |
4947 | { | |
4948 | asection *section; | |
4949 | ||
4950 | /* This is a relocation against a section. We must | |
4951 | adjust by the amount that the section moved. */ | |
4952 | section = aout_reloc_index_to_section (input_bfd, r_index); | |
4953 | relocation = (section->output_section->vma | |
4954 | + section->output_offset | |
4955 | - section->vma); | |
4956 | } | |
4957 | ||
4958 | /* Change the address of the relocation. */ | |
4959 | PUT_WORD (output_bfd, | |
4960 | r_addr + input_section->output_offset, | |
4961 | rel->r_address); | |
4962 | ||
4963 | /* Adjust a PC relative relocation by removing the reference | |
4964 | to the original address in the section and including the | |
4965 | reference to the new address. */ | |
4966 | if (r_pcrel) | |
4967 | relocation -= (input_section->output_section->vma | |
4968 | + input_section->output_offset | |
4969 | - input_section->vma); | |
4970 | ||
4971 | #ifdef MY_relocatable_reloc | |
4972 | MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr); | |
4973 | #endif | |
4974 | ||
4975 | if (relocation == 0) | |
4976 | r = bfd_reloc_ok; | |
4977 | else | |
4978 | r = MY_relocate_contents (howto, | |
4979 | input_bfd, relocation, | |
4980 | contents + r_addr); | |
4981 | } | |
4982 | else | |
4983 | { | |
4984 | boolean hundef; | |
4985 | ||
4986 | /* We are generating an executable, and must do a full | |
4987 | relocation. */ | |
4988 | hundef = false; | |
4989 | ||
4990 | if (r_extern) | |
4991 | { | |
4992 | h = sym_hashes[r_index]; | |
4993 | ||
4994 | if (h != (struct aout_link_hash_entry *) NULL | |
4995 | && (h->root.type == bfd_link_hash_defined | |
4996 | || h->root.type == bfd_link_hash_defweak)) | |
4997 | { | |
4998 | relocation = (h->root.u.def.value | |
4999 | + h->root.u.def.section->output_section->vma | |
5000 | + h->root.u.def.section->output_offset); | |
5001 | } | |
5002 | else if (h != (struct aout_link_hash_entry *) NULL | |
5003 | && h->root.type == bfd_link_hash_undefweak) | |
5004 | relocation = 0; | |
5005 | else | |
5006 | { | |
5007 | hundef = true; | |
5008 | relocation = 0; | |
5009 | } | |
5010 | } | |
5011 | else | |
5012 | { | |
5013 | asection *section; | |
5014 | ||
5015 | section = aout_reloc_index_to_section (input_bfd, r_index); | |
5016 | relocation = (section->output_section->vma | |
5017 | + section->output_offset | |
5018 | - section->vma); | |
5019 | if (r_pcrel) | |
5020 | relocation += input_section->vma; | |
5021 | } | |
5022 | ||
5023 | if (check_dynamic_reloc != NULL) | |
5024 | { | |
5025 | boolean skip; | |
5026 | ||
5027 | if (! ((*check_dynamic_reloc) | |
5028 | (finfo->info, input_bfd, input_section, h, | |
5029 | (PTR) rel, contents, &skip, &relocation))) | |
5030 | return false; | |
5031 | if (skip) | |
5032 | continue; | |
5033 | } | |
5034 | ||
5035 | /* Now warn if a global symbol is undefined. We could not | |
5036 | do this earlier, because check_dynamic_reloc might want | |
5037 | to skip this reloc. */ | |
5038 | if (hundef && ! finfo->info->shared && ! r_baserel) | |
5039 | { | |
5040 | const char *name; | |
5041 | ||
5042 | if (h != NULL) | |
5043 | name = h->root.root.string; | |
5044 | else | |
5045 | name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); | |
5046 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
5cc7c785 L |
5047 | (finfo->info, name, input_bfd, input_section, |
5048 | r_addr, true))) | |
252b5132 RH |
5049 | return false; |
5050 | } | |
5051 | ||
5052 | r = MY_final_link_relocate (howto, | |
5053 | input_bfd, input_section, | |
5054 | contents, r_addr, relocation, | |
5055 | (bfd_vma) 0); | |
5056 | } | |
5057 | ||
5058 | if (r != bfd_reloc_ok) | |
5059 | { | |
5060 | switch (r) | |
5061 | { | |
5062 | default: | |
5063 | case bfd_reloc_outofrange: | |
5064 | abort (); | |
5065 | case bfd_reloc_overflow: | |
5066 | { | |
5067 | const char *name; | |
5068 | ||
5069 | if (h != NULL) | |
5070 | name = h->root.root.string; | |
5071 | else if (r_extern) | |
5072 | name = strings + GET_WORD (input_bfd, | |
5073 | syms[r_index].e_strx); | |
5074 | else | |
5075 | { | |
5076 | asection *s; | |
5077 | ||
5078 | s = aout_reloc_index_to_section (input_bfd, r_index); | |
5079 | name = bfd_section_name (input_bfd, s); | |
5080 | } | |
5081 | if (! ((*finfo->info->callbacks->reloc_overflow) | |
5082 | (finfo->info, name, howto->name, | |
5083 | (bfd_vma) 0, input_bfd, input_section, r_addr))) | |
5084 | return false; | |
5085 | } | |
5086 | break; | |
5087 | } | |
5088 | } | |
5089 | } | |
5090 | ||
5091 | return true; | |
5092 | } | |
5093 | ||
5094 | /* Relocate an a.out section using extended a.out relocs. */ | |
5095 | ||
5096 | static boolean | |
5097 | aout_link_input_section_ext (finfo, input_bfd, input_section, relocs, | |
5098 | rel_size, contents) | |
5099 | struct aout_final_link_info *finfo; | |
5100 | bfd *input_bfd; | |
5101 | asection *input_section; | |
5102 | struct reloc_ext_external *relocs; | |
5103 | bfd_size_type rel_size; | |
5104 | bfd_byte *contents; | |
5105 | { | |
5106 | boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *, | |
5107 | bfd *, asection *, | |
5108 | struct aout_link_hash_entry *, | |
5109 | PTR, bfd_byte *, boolean *, | |
5110 | bfd_vma *)); | |
5111 | bfd *output_bfd; | |
5112 | boolean relocateable; | |
5113 | struct external_nlist *syms; | |
5114 | char *strings; | |
5115 | struct aout_link_hash_entry **sym_hashes; | |
5116 | int *symbol_map; | |
5117 | bfd_size_type reloc_count; | |
5118 | register struct reloc_ext_external *rel; | |
5119 | struct reloc_ext_external *rel_end; | |
5120 | ||
5121 | output_bfd = finfo->output_bfd; | |
5122 | check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc; | |
5123 | ||
5124 | BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE); | |
5125 | BFD_ASSERT (input_bfd->xvec->header_byteorder | |
5126 | == output_bfd->xvec->header_byteorder); | |
5127 | ||
5128 | relocateable = finfo->info->relocateable; | |
5129 | syms = obj_aout_external_syms (input_bfd); | |
5130 | strings = obj_aout_external_strings (input_bfd); | |
5131 | sym_hashes = obj_aout_sym_hashes (input_bfd); | |
5132 | symbol_map = finfo->symbol_map; | |
5133 | ||
5134 | reloc_count = rel_size / RELOC_EXT_SIZE; | |
5135 | rel = relocs; | |
5136 | rel_end = rel + reloc_count; | |
5137 | for (; rel < rel_end; rel++) | |
5138 | { | |
5139 | bfd_vma r_addr; | |
5140 | int r_index; | |
5141 | int r_extern; | |
5142 | unsigned int r_type; | |
5143 | bfd_vma r_addend; | |
5144 | struct aout_link_hash_entry *h = NULL; | |
5145 | asection *r_section = NULL; | |
5146 | bfd_vma relocation; | |
5147 | ||
5148 | r_addr = GET_SWORD (input_bfd, rel->r_address); | |
5149 | ||
5150 | if (bfd_header_big_endian (input_bfd)) | |
5151 | { | |
5152 | r_index = ((rel->r_index[0] << 16) | |
5153 | | (rel->r_index[1] << 8) | |
5154 | | rel->r_index[2]); | |
5155 | r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG)); | |
5156 | r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG) | |
5157 | >> RELOC_EXT_BITS_TYPE_SH_BIG); | |
5158 | } | |
5159 | else | |
5160 | { | |
5161 | r_index = ((rel->r_index[2] << 16) | |
5162 | | (rel->r_index[1] << 8) | |
5163 | | rel->r_index[0]); | |
5164 | r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); | |
5165 | r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE) | |
5166 | >> RELOC_EXT_BITS_TYPE_SH_LITTLE); | |
5167 | } | |
5168 | ||
5169 | r_addend = GET_SWORD (input_bfd, rel->r_addend); | |
5170 | ||
5171 | BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext)); | |
5172 | ||
5173 | if (relocateable) | |
5174 | { | |
5175 | /* We are generating a relocateable output file, and must | |
5176 | modify the reloc accordingly. */ | |
5177 | if (r_extern | |
5178 | || r_type == RELOC_BASE10 | |
5179 | || r_type == RELOC_BASE13 | |
5180 | || r_type == RELOC_BASE22) | |
5181 | { | |
5182 | /* If we know the symbol this relocation is against, | |
5183 | convert it into a relocation against a section. This | |
5184 | is what the native linker does. */ | |
5185 | if (r_type == RELOC_BASE10 | |
5186 | || r_type == RELOC_BASE13 | |
5187 | || r_type == RELOC_BASE22) | |
5188 | h = NULL; | |
5189 | else | |
5190 | h = sym_hashes[r_index]; | |
5191 | if (h != (struct aout_link_hash_entry *) NULL | |
5192 | && (h->root.type == bfd_link_hash_defined | |
5193 | || h->root.type == bfd_link_hash_defweak)) | |
5194 | { | |
5195 | asection *output_section; | |
5196 | ||
5197 | /* Change the r_extern value. */ | |
5198 | if (bfd_header_big_endian (output_bfd)) | |
5199 | rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG; | |
5200 | else | |
5201 | rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE; | |
5202 | ||
5203 | /* Compute a new r_index. */ | |
5204 | output_section = h->root.u.def.section->output_section; | |
5205 | if (output_section == obj_textsec (output_bfd)) | |
5206 | r_index = N_TEXT; | |
5207 | else if (output_section == obj_datasec (output_bfd)) | |
5208 | r_index = N_DATA; | |
5209 | else if (output_section == obj_bsssec (output_bfd)) | |
5210 | r_index = N_BSS; | |
5211 | else | |
5212 | r_index = N_ABS; | |
5213 | ||
5214 | /* Add the symbol value and the section VMA to the | |
5215 | addend. */ | |
5216 | relocation = (h->root.u.def.value | |
5217 | + output_section->vma | |
5218 | + h->root.u.def.section->output_offset); | |
5219 | ||
5220 | /* Now RELOCATION is the VMA of the final | |
5221 | destination. If this is a PC relative reloc, | |
5222 | then ADDEND is the negative of the source VMA. | |
5223 | We want to set ADDEND to the difference between | |
5224 | the destination VMA and the source VMA, which | |
5225 | means we must adjust RELOCATION by the change in | |
5226 | the source VMA. This is done below. */ | |
5227 | } | |
5228 | else | |
5229 | { | |
5230 | /* We must change r_index according to the symbol | |
5231 | map. */ | |
5232 | r_index = symbol_map[r_index]; | |
5233 | ||
5234 | if (r_index == -1) | |
5235 | { | |
5236 | if (h != NULL) | |
5237 | { | |
5238 | /* We decided to strip this symbol, but it | |
5239 | turns out that we can't. Note that we | |
5240 | lose the other and desc information here. | |
5241 | I don't think that will ever matter for a | |
5242 | global symbol. */ | |
5243 | if (h->indx < 0) | |
5244 | { | |
5245 | h->indx = -2; | |
5246 | h->written = false; | |
5247 | if (! aout_link_write_other_symbol (h, | |
5248 | (PTR) finfo)) | |
5249 | return false; | |
5250 | } | |
5251 | r_index = h->indx; | |
5252 | } | |
5253 | else | |
5254 | { | |
5255 | const char *name; | |
5256 | ||
5257 | name = strings + GET_WORD (input_bfd, | |
5258 | syms[r_index].e_strx); | |
5259 | if (! ((*finfo->info->callbacks->unattached_reloc) | |
5260 | (finfo->info, name, input_bfd, input_section, | |
5261 | r_addr))) | |
5262 | return false; | |
5263 | r_index = 0; | |
5264 | } | |
5265 | } | |
5266 | ||
5267 | relocation = 0; | |
5268 | ||
5269 | /* If this is a PC relative reloc, then the addend | |
5270 | is the negative of the source VMA. We must | |
5271 | adjust it by the change in the source VMA. This | |
5272 | is done below. */ | |
5273 | } | |
5274 | ||
5275 | /* Write out the new r_index value. */ | |
5276 | if (bfd_header_big_endian (output_bfd)) | |
5277 | { | |
5278 | rel->r_index[0] = r_index >> 16; | |
5279 | rel->r_index[1] = r_index >> 8; | |
5280 | rel->r_index[2] = r_index; | |
5281 | } | |
5282 | else | |
5283 | { | |
5284 | rel->r_index[2] = r_index >> 16; | |
5285 | rel->r_index[1] = r_index >> 8; | |
5286 | rel->r_index[0] = r_index; | |
5287 | } | |
5288 | } | |
5289 | else | |
5290 | { | |
5291 | /* This is a relocation against a section. We must | |
5292 | adjust by the amount that the section moved. */ | |
5293 | r_section = aout_reloc_index_to_section (input_bfd, r_index); | |
5294 | relocation = (r_section->output_section->vma | |
5295 | + r_section->output_offset | |
5296 | - r_section->vma); | |
5297 | ||
5298 | /* If this is a PC relative reloc, then the addend is | |
5299 | the difference in VMA between the destination and the | |
5300 | source. We have just adjusted for the change in VMA | |
5301 | of the destination, so we must also adjust by the | |
5302 | change in VMA of the source. This is done below. */ | |
5303 | } | |
5304 | ||
5305 | /* As described above, we must always adjust a PC relative | |
5306 | reloc by the change in VMA of the source. However, if | |
5307 | pcrel_offset is set, then the addend does not include the | |
5308 | location within the section, in which case we don't need | |
5309 | to adjust anything. */ | |
5310 | if (howto_table_ext[r_type].pc_relative | |
5311 | && ! howto_table_ext[r_type].pcrel_offset) | |
5312 | relocation -= (input_section->output_section->vma | |
5313 | + input_section->output_offset | |
5314 | - input_section->vma); | |
5315 | ||
5316 | /* Change the addend if necessary. */ | |
5317 | if (relocation != 0) | |
5318 | PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend); | |
5319 | ||
5320 | /* Change the address of the relocation. */ | |
5321 | PUT_WORD (output_bfd, | |
5322 | r_addr + input_section->output_offset, | |
5323 | rel->r_address); | |
5324 | } | |
5325 | else | |
5326 | { | |
5327 | boolean hundef; | |
5328 | bfd_reloc_status_type r; | |
5329 | ||
5330 | /* We are generating an executable, and must do a full | |
5331 | relocation. */ | |
5332 | hundef = false; | |
5333 | ||
5334 | if (r_extern) | |
5335 | { | |
5336 | h = sym_hashes[r_index]; | |
5337 | ||
5338 | if (h != (struct aout_link_hash_entry *) NULL | |
5339 | && (h->root.type == bfd_link_hash_defined | |
5340 | || h->root.type == bfd_link_hash_defweak)) | |
5341 | { | |
5342 | relocation = (h->root.u.def.value | |
5343 | + h->root.u.def.section->output_section->vma | |
5344 | + h->root.u.def.section->output_offset); | |
5345 | } | |
5346 | else if (h != (struct aout_link_hash_entry *) NULL | |
5347 | && h->root.type == bfd_link_hash_undefweak) | |
5348 | relocation = 0; | |
5349 | else | |
5350 | { | |
5351 | hundef = true; | |
5352 | relocation = 0; | |
5353 | } | |
5354 | } | |
5355 | else if (r_type == RELOC_BASE10 | |
5356 | || r_type == RELOC_BASE13 | |
5357 | || r_type == RELOC_BASE22) | |
5358 | { | |
5359 | struct external_nlist *sym; | |
5360 | int type; | |
5361 | ||
5362 | /* For base relative relocs, r_index is always an index | |
5363 | into the symbol table, even if r_extern is 0. */ | |
5364 | sym = syms + r_index; | |
5365 | type = bfd_h_get_8 (input_bfd, sym->e_type); | |
5366 | if ((type & N_TYPE) == N_TEXT | |
5367 | || type == N_WEAKT) | |
5368 | r_section = obj_textsec (input_bfd); | |
5369 | else if ((type & N_TYPE) == N_DATA | |
5370 | || type == N_WEAKD) | |
5371 | r_section = obj_datasec (input_bfd); | |
5372 | else if ((type & N_TYPE) == N_BSS | |
5373 | || type == N_WEAKB) | |
5374 | r_section = obj_bsssec (input_bfd); | |
5375 | else if ((type & N_TYPE) == N_ABS | |
5376 | || type == N_WEAKA) | |
5377 | r_section = bfd_abs_section_ptr; | |
5378 | else | |
5379 | abort (); | |
5380 | relocation = (r_section->output_section->vma | |
5381 | + r_section->output_offset | |
5382 | + (GET_WORD (input_bfd, sym->e_value) | |
5383 | - r_section->vma)); | |
5384 | } | |
5385 | else | |
5386 | { | |
5387 | r_section = aout_reloc_index_to_section (input_bfd, r_index); | |
5388 | ||
5389 | /* If this is a PC relative reloc, then R_ADDEND is the | |
5390 | difference between the two vmas, or | |
5391 | old_dest_sec + old_dest_off - (old_src_sec + old_src_off) | |
5392 | where | |
5393 | old_dest_sec == section->vma | |
5394 | and | |
5395 | old_src_sec == input_section->vma | |
5396 | and | |
5397 | old_src_off == r_addr | |
5398 | ||
5399 | _bfd_final_link_relocate expects RELOCATION + | |
5400 | R_ADDEND to be the VMA of the destination minus | |
5401 | r_addr (the minus r_addr is because this relocation | |
5402 | is not pcrel_offset, which is a bit confusing and | |
5403 | should, perhaps, be changed), or | |
5404 | new_dest_sec | |
5405 | where | |
5406 | new_dest_sec == output_section->vma + output_offset | |
5407 | We arrange for this to happen by setting RELOCATION to | |
5408 | new_dest_sec + old_src_sec - old_dest_sec | |
5409 | ||
5410 | If this is not a PC relative reloc, then R_ADDEND is | |
5411 | simply the VMA of the destination, so we set | |
5412 | RELOCATION to the change in the destination VMA, or | |
5413 | new_dest_sec - old_dest_sec | |
5414 | */ | |
5415 | relocation = (r_section->output_section->vma | |
5416 | + r_section->output_offset | |
5417 | - r_section->vma); | |
5418 | if (howto_table_ext[r_type].pc_relative) | |
5419 | relocation += input_section->vma; | |
5420 | } | |
5421 | ||
5422 | if (check_dynamic_reloc != NULL) | |
5423 | { | |
5424 | boolean skip; | |
5425 | ||
5426 | if (! ((*check_dynamic_reloc) | |
5427 | (finfo->info, input_bfd, input_section, h, | |
5428 | (PTR) rel, contents, &skip, &relocation))) | |
5429 | return false; | |
5430 | if (skip) | |
5431 | continue; | |
5432 | } | |
5433 | ||
5434 | /* Now warn if a global symbol is undefined. We could not | |
5435 | do this earlier, because check_dynamic_reloc might want | |
5436 | to skip this reloc. */ | |
5437 | if (hundef | |
5438 | && ! finfo->info->shared | |
5439 | && r_type != RELOC_BASE10 | |
5440 | && r_type != RELOC_BASE13 | |
5441 | && r_type != RELOC_BASE22) | |
5442 | { | |
5443 | const char *name; | |
5444 | ||
5445 | if (h != NULL) | |
5446 | name = h->root.root.string; | |
5447 | else | |
5448 | name = strings + GET_WORD (input_bfd, syms[r_index].e_strx); | |
5449 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
5cc7c785 L |
5450 | (finfo->info, name, input_bfd, input_section, |
5451 | r_addr, true))) | |
252b5132 RH |
5452 | return false; |
5453 | } | |
5454 | ||
5455 | if (r_type != RELOC_SPARC_REV32) | |
5456 | r = MY_final_link_relocate (howto_table_ext + r_type, | |
5457 | input_bfd, input_section, | |
5458 | contents, r_addr, relocation, | |
5459 | r_addend); | |
5460 | else | |
5461 | { | |
5462 | bfd_vma x; | |
5463 | ||
5464 | x = bfd_get_32 (input_bfd, contents + r_addr); | |
5465 | x = x + relocation + r_addend; | |
5466 | bfd_putl32 (/*input_bfd,*/ x, contents + r_addr); | |
5467 | r = bfd_reloc_ok; | |
5468 | } | |
5469 | ||
5470 | if (r != bfd_reloc_ok) | |
5471 | { | |
5472 | switch (r) | |
5473 | { | |
5474 | default: | |
5475 | case bfd_reloc_outofrange: | |
5476 | abort (); | |
5477 | case bfd_reloc_overflow: | |
5478 | { | |
5479 | const char *name; | |
5480 | ||
5481 | if (h != NULL) | |
5482 | name = h->root.root.string; | |
5483 | else if (r_extern | |
5484 | || r_type == RELOC_BASE10 | |
5485 | || r_type == RELOC_BASE13 | |
5486 | || r_type == RELOC_BASE22) | |
5487 | name = strings + GET_WORD (input_bfd, | |
5488 | syms[r_index].e_strx); | |
5489 | else | |
5490 | { | |
5491 | asection *s; | |
5492 | ||
5493 | s = aout_reloc_index_to_section (input_bfd, r_index); | |
5494 | name = bfd_section_name (input_bfd, s); | |
5495 | } | |
5496 | if (! ((*finfo->info->callbacks->reloc_overflow) | |
5497 | (finfo->info, name, howto_table_ext[r_type].name, | |
5498 | r_addend, input_bfd, input_section, r_addr))) | |
5499 | return false; | |
5500 | } | |
5501 | break; | |
5502 | } | |
5503 | } | |
5504 | } | |
5505 | } | |
5506 | ||
5507 | return true; | |
5508 | } | |
5509 | ||
5510 | /* Handle a link order which is supposed to generate a reloc. */ | |
5511 | ||
5512 | static boolean | |
5513 | aout_link_reloc_link_order (finfo, o, p) | |
5514 | struct aout_final_link_info *finfo; | |
5515 | asection *o; | |
5516 | struct bfd_link_order *p; | |
5517 | { | |
5518 | struct bfd_link_order_reloc *pr; | |
5519 | int r_index; | |
5520 | int r_extern; | |
5521 | reloc_howto_type *howto; | |
7442e600 | 5522 | file_ptr *reloff_ptr = NULL; |
252b5132 RH |
5523 | struct reloc_std_external srel; |
5524 | struct reloc_ext_external erel; | |
5525 | PTR rel_ptr; | |
5526 | ||
5527 | pr = p->u.reloc.p; | |
5528 | ||
5529 | if (p->type == bfd_section_reloc_link_order) | |
5530 | { | |
5531 | r_extern = 0; | |
5532 | if (bfd_is_abs_section (pr->u.section)) | |
5533 | r_index = N_ABS | N_EXT; | |
5534 | else | |
5535 | { | |
5536 | BFD_ASSERT (pr->u.section->owner == finfo->output_bfd); | |
5537 | r_index = pr->u.section->target_index; | |
5538 | } | |
5539 | } | |
5540 | else | |
5541 | { | |
5542 | struct aout_link_hash_entry *h; | |
5543 | ||
5544 | BFD_ASSERT (p->type == bfd_symbol_reloc_link_order); | |
5545 | r_extern = 1; | |
5546 | h = ((struct aout_link_hash_entry *) | |
5547 | bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info, | |
5548 | pr->u.name, false, false, true)); | |
5549 | if (h != (struct aout_link_hash_entry *) NULL | |
5550 | && h->indx >= 0) | |
5551 | r_index = h->indx; | |
5552 | else if (h != NULL) | |
5553 | { | |
5554 | /* We decided to strip this symbol, but it turns out that we | |
5555 | can't. Note that we lose the other and desc information | |
5556 | here. I don't think that will ever matter for a global | |
5557 | symbol. */ | |
5558 | h->indx = -2; | |
5559 | h->written = false; | |
5560 | if (! aout_link_write_other_symbol (h, (PTR) finfo)) | |
5561 | return false; | |
5562 | r_index = h->indx; | |
5563 | } | |
5564 | else | |
5565 | { | |
5566 | if (! ((*finfo->info->callbacks->unattached_reloc) | |
5567 | (finfo->info, pr->u.name, (bfd *) NULL, | |
5568 | (asection *) NULL, (bfd_vma) 0))) | |
5569 | return false; | |
5570 | r_index = 0; | |
5571 | } | |
5572 | } | |
5573 | ||
5574 | howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc); | |
5575 | if (howto == 0) | |
5576 | { | |
5577 | bfd_set_error (bfd_error_bad_value); | |
5578 | return false; | |
5579 | } | |
5580 | ||
5581 | if (o == obj_textsec (finfo->output_bfd)) | |
5582 | reloff_ptr = &finfo->treloff; | |
5583 | else if (o == obj_datasec (finfo->output_bfd)) | |
5584 | reloff_ptr = &finfo->dreloff; | |
5585 | else | |
5586 | abort (); | |
5587 | ||
5588 | if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE) | |
5589 | { | |
5590 | #ifdef MY_put_reloc | |
5591 | MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto, | |
5592 | &srel); | |
5593 | #else | |
5594 | { | |
5595 | int r_pcrel; | |
5596 | int r_baserel; | |
5597 | int r_jmptable; | |
5598 | int r_relative; | |
5599 | int r_length; | |
5600 | ||
5601 | r_pcrel = howto->pc_relative; | |
5602 | r_baserel = (howto->type & 8) != 0; | |
5603 | r_jmptable = (howto->type & 16) != 0; | |
5604 | r_relative = (howto->type & 32) != 0; | |
5605 | r_length = howto->size; | |
5606 | ||
5607 | PUT_WORD (finfo->output_bfd, p->offset, srel.r_address); | |
5608 | if (bfd_header_big_endian (finfo->output_bfd)) | |
5609 | { | |
5610 | srel.r_index[0] = r_index >> 16; | |
5611 | srel.r_index[1] = r_index >> 8; | |
5612 | srel.r_index[2] = r_index; | |
5613 | srel.r_type[0] = | |
5614 | ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0) | |
5615 | | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0) | |
5616 | | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0) | |
5617 | | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0) | |
5618 | | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0) | |
5619 | | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG)); | |
5620 | } | |
5621 | else | |
5622 | { | |
5623 | srel.r_index[2] = r_index >> 16; | |
5624 | srel.r_index[1] = r_index >> 8; | |
5625 | srel.r_index[0] = r_index; | |
5626 | srel.r_type[0] = | |
5627 | ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0) | |
5628 | | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0) | |
5629 | | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0) | |
5630 | | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0) | |
5631 | | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0) | |
5632 | | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)); | |
5633 | } | |
5634 | } | |
5635 | #endif | |
5636 | rel_ptr = (PTR) &srel; | |
5637 | ||
5638 | /* We have to write the addend into the object file, since | |
5639 | standard a.out relocs are in place. It would be more | |
5640 | reliable if we had the current contents of the file here, | |
5641 | rather than assuming zeroes, but we can't read the file since | |
5642 | it was opened using bfd_openw. */ | |
5643 | if (pr->addend != 0) | |
5644 | { | |
5645 | bfd_size_type size; | |
5646 | bfd_reloc_status_type r; | |
5647 | bfd_byte *buf; | |
5648 | boolean ok; | |
5649 | ||
5650 | size = bfd_get_reloc_size (howto); | |
5651 | buf = (bfd_byte *) bfd_zmalloc (size); | |
5652 | if (buf == (bfd_byte *) NULL) | |
5653 | return false; | |
5654 | r = MY_relocate_contents (howto, finfo->output_bfd, | |
5655 | pr->addend, buf); | |
5656 | switch (r) | |
5657 | { | |
5658 | case bfd_reloc_ok: | |
5659 | break; | |
5660 | default: | |
5661 | case bfd_reloc_outofrange: | |
5662 | abort (); | |
5663 | case bfd_reloc_overflow: | |
5664 | if (! ((*finfo->info->callbacks->reloc_overflow) | |
5665 | (finfo->info, | |
5666 | (p->type == bfd_section_reloc_link_order | |
5667 | ? bfd_section_name (finfo->output_bfd, | |
5668 | pr->u.section) | |
5669 | : pr->u.name), | |
5670 | howto->name, pr->addend, (bfd *) NULL, | |
5671 | (asection *) NULL, (bfd_vma) 0))) | |
5672 | { | |
5673 | free (buf); | |
5674 | return false; | |
5675 | } | |
5676 | break; | |
5677 | } | |
5678 | ok = bfd_set_section_contents (finfo->output_bfd, o, | |
5679 | (PTR) buf, | |
5680 | (file_ptr) p->offset, | |
5681 | size); | |
5682 | free (buf); | |
5683 | if (! ok) | |
5684 | return false; | |
5685 | } | |
5686 | } | |
5687 | else | |
5688 | { | |
1642229e HPN |
5689 | #ifdef MY_put_ext_reloc |
5690 | MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset, | |
5691 | howto, &erel, pr->addend); | |
5692 | #else | |
252b5132 RH |
5693 | PUT_WORD (finfo->output_bfd, p->offset, erel.r_address); |
5694 | ||
5695 | if (bfd_header_big_endian (finfo->output_bfd)) | |
5696 | { | |
5697 | erel.r_index[0] = r_index >> 16; | |
5698 | erel.r_index[1] = r_index >> 8; | |
5699 | erel.r_index[2] = r_index; | |
5700 | erel.r_type[0] = | |
5701 | ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0) | |
5702 | | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG)); | |
5703 | } | |
5704 | else | |
5705 | { | |
5706 | erel.r_index[2] = r_index >> 16; | |
5707 | erel.r_index[1] = r_index >> 8; | |
5708 | erel.r_index[0] = r_index; | |
5709 | erel.r_type[0] = | |
5710 | (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) | |
5711 | | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE); | |
5712 | } | |
5713 | ||
5714 | PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend); | |
1642229e | 5715 | #endif /* MY_put_ext_reloc */ |
252b5132 RH |
5716 | |
5717 | rel_ptr = (PTR) &erel; | |
5718 | } | |
5719 | ||
5720 | if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0 | |
5721 | || (bfd_write (rel_ptr, (bfd_size_type) 1, | |
5722 | obj_reloc_entry_size (finfo->output_bfd), | |
5723 | finfo->output_bfd) | |
5724 | != obj_reloc_entry_size (finfo->output_bfd))) | |
5725 | return false; | |
5726 | ||
5727 | *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd); | |
5728 | ||
5729 | /* Assert that the relocs have not run into the symbols, and that n | |
5730 | the text relocs have not run into the data relocs. */ | |
5731 | BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd) | |
5732 | && (reloff_ptr != &finfo->treloff | |
5733 | || (*reloff_ptr | |
5734 | <= obj_datasec (finfo->output_bfd)->rel_filepos))); | |
5735 | ||
5736 | return true; | |
5737 | } |