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252b5132 | 1 | /* Object file "section" support for the BFD library. |
7898deda | 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
dbaa2011 | 3 | 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, |
45a466b5 | 4 | 2012, 2013 |
252b5132 RH |
5 | Free Software Foundation, Inc. |
6 | Written by Cygnus Support. | |
7 | ||
cd123cb7 NC |
8 | This file is part of BFD, the Binary File Descriptor library. |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
23 | MA 02110-1301, USA. */ | |
252b5132 RH |
24 | |
25 | /* | |
26 | SECTION | |
27 | Sections | |
28 | ||
29 | The raw data contained within a BFD is maintained through the | |
30 | section abstraction. A single BFD may have any number of | |
31 | sections. It keeps hold of them by pointing to the first; | |
32 | each one points to the next in the list. | |
33 | ||
34 | Sections are supported in BFD in <<section.c>>. | |
35 | ||
36 | @menu | |
37 | @* Section Input:: | |
38 | @* Section Output:: | |
39 | @* typedef asection:: | |
40 | @* section prototypes:: | |
41 | @end menu | |
42 | ||
43 | INODE | |
44 | Section Input, Section Output, Sections, Sections | |
45 | SUBSECTION | |
46 | Section input | |
47 | ||
48 | When a BFD is opened for reading, the section structures are | |
49 | created and attached to the BFD. | |
50 | ||
51 | Each section has a name which describes the section in the | |
52 | outside world---for example, <<a.out>> would contain at least | |
53 | three sections, called <<.text>>, <<.data>> and <<.bss>>. | |
54 | ||
55 | Names need not be unique; for example a COFF file may have several | |
56 | sections named <<.data>>. | |
57 | ||
58 | Sometimes a BFD will contain more than the ``natural'' number of | |
59 | sections. A back end may attach other sections containing | |
60 | constructor data, or an application may add a section (using | |
61 | <<bfd_make_section>>) to the sections attached to an already open | |
62 | BFD. For example, the linker creates an extra section | |
63 | <<COMMON>> for each input file's BFD to hold information about | |
64 | common storage. | |
65 | ||
66 | The raw data is not necessarily read in when | |
67 | the section descriptor is created. Some targets may leave the | |
68 | data in place until a <<bfd_get_section_contents>> call is | |
69 | made. Other back ends may read in all the data at once. For | |
70 | example, an S-record file has to be read once to determine the | |
71 | size of the data. An IEEE-695 file doesn't contain raw data in | |
72 | sections, but data and relocation expressions intermixed, so | |
73 | the data area has to be parsed to get out the data and | |
74 | relocations. | |
75 | ||
76 | INODE | |
77 | Section Output, typedef asection, Section Input, Sections | |
78 | ||
79 | SUBSECTION | |
80 | Section output | |
81 | ||
82 | To write a new object style BFD, the various sections to be | |
83 | written have to be created. They are attached to the BFD in | |
84 | the same way as input sections; data is written to the | |
85 | sections using <<bfd_set_section_contents>>. | |
86 | ||
87 | Any program that creates or combines sections (e.g., the assembler | |
88 | and linker) must use the <<asection>> fields <<output_section>> and | |
89 | <<output_offset>> to indicate the file sections to which each | |
90 | section must be written. (If the section is being created from | |
91 | scratch, <<output_section>> should probably point to the section | |
92 | itself and <<output_offset>> should probably be zero.) | |
93 | ||
94 | The data to be written comes from input sections attached | |
95 | (via <<output_section>> pointers) to | |
96 | the output sections. The output section structure can be | |
97 | considered a filter for the input section: the output section | |
98 | determines the vma of the output data and the name, but the | |
99 | input section determines the offset into the output section of | |
100 | the data to be written. | |
101 | ||
102 | E.g., to create a section "O", starting at 0x100, 0x123 long, | |
103 | containing two subsections, "A" at offset 0x0 (i.e., at vma | |
104 | 0x100) and "B" at offset 0x20 (i.e., at vma 0x120) the <<asection>> | |
105 | structures would look like: | |
106 | ||
107 | | section name "A" | |
108 | | output_offset 0x00 | |
109 | | size 0x20 | |
110 | | output_section -----------> section name "O" | |
111 | | | vma 0x100 | |
112 | | section name "B" | size 0x123 | |
113 | | output_offset 0x20 | | |
114 | | size 0x103 | | |
115 | | output_section --------| | |
116 | ||
252b5132 RH |
117 | SUBSECTION |
118 | Link orders | |
119 | ||
120 | The data within a section is stored in a @dfn{link_order}. | |
121 | These are much like the fixups in <<gas>>. The link_order | |
122 | abstraction allows a section to grow and shrink within itself. | |
123 | ||
124 | A link_order knows how big it is, and which is the next | |
125 | link_order and where the raw data for it is; it also points to | |
126 | a list of relocations which apply to it. | |
127 | ||
128 | The link_order is used by the linker to perform relaxing on | |
129 | final code. The compiler creates code which is as big as | |
130 | necessary to make it work without relaxing, and the user can | |
131 | select whether to relax. Sometimes relaxing takes a lot of | |
132 | time. The linker runs around the relocations to see if any | |
133 | are attached to data which can be shrunk, if so it does it on | |
134 | a link_order by link_order basis. | |
135 | ||
136 | */ | |
137 | ||
252b5132 | 138 | #include "sysdep.h" |
3db64b00 | 139 | #include "bfd.h" |
252b5132 RH |
140 | #include "libbfd.h" |
141 | #include "bfdlink.h" | |
142 | ||
143 | /* | |
144 | DOCDD | |
145 | INODE | |
146 | typedef asection, section prototypes, Section Output, Sections | |
147 | SUBSECTION | |
148 | typedef asection | |
149 | ||
150 | Here is the section structure: | |
151 | ||
152 | CODE_FRAGMENT | |
153 | . | |
198beae2 | 154 | .typedef struct bfd_section |
252b5132 | 155 | .{ |
52b219b5 AM |
156 | . {* The name of the section; the name isn't a copy, the pointer is |
157 | . the same as that passed to bfd_make_section. *} | |
52b219b5 AM |
158 | . const char *name; |
159 | . | |
160 | . {* A unique sequence number. *} | |
52b219b5 | 161 | . int id; |
252b5132 | 162 | . |
dbb410c3 | 163 | . {* Which section in the bfd; 0..n-1 as sections are created in a bfd. *} |
52b219b5 | 164 | . int index; |
252b5132 | 165 | . |
52b219b5 | 166 | . {* The next section in the list belonging to the BFD, or NULL. *} |
198beae2 | 167 | . struct bfd_section *next; |
252b5132 | 168 | . |
5daa8fe7 L |
169 | . {* The previous section in the list belonging to the BFD, or NULL. *} |
170 | . struct bfd_section *prev; | |
171 | . | |
52b219b5 AM |
172 | . {* The field flags contains attributes of the section. Some |
173 | . flags are read in from the object file, and some are | |
174 | . synthesized from other information. *} | |
52b219b5 | 175 | . flagword flags; |
252b5132 RH |
176 | . |
177 | .#define SEC_NO_FLAGS 0x000 | |
178 | . | |
52b219b5 AM |
179 | . {* Tells the OS to allocate space for this section when loading. |
180 | . This is clear for a section containing debug information only. *} | |
252b5132 RH |
181 | .#define SEC_ALLOC 0x001 |
182 | . | |
52b219b5 AM |
183 | . {* Tells the OS to load the section from the file when loading. |
184 | . This is clear for a .bss section. *} | |
252b5132 RH |
185 | .#define SEC_LOAD 0x002 |
186 | . | |
52b219b5 AM |
187 | . {* The section contains data still to be relocated, so there is |
188 | . some relocation information too. *} | |
252b5132 RH |
189 | .#define SEC_RELOC 0x004 |
190 | . | |
52b219b5 | 191 | . {* A signal to the OS that the section contains read only data. *} |
ebe372c1 | 192 | .#define SEC_READONLY 0x008 |
252b5132 | 193 | . |
52b219b5 | 194 | . {* The section contains code only. *} |
ebe372c1 | 195 | .#define SEC_CODE 0x010 |
252b5132 | 196 | . |
52b219b5 | 197 | . {* The section contains data only. *} |
ebe372c1 | 198 | .#define SEC_DATA 0x020 |
252b5132 | 199 | . |
52b219b5 | 200 | . {* The section will reside in ROM. *} |
ebe372c1 | 201 | .#define SEC_ROM 0x040 |
252b5132 | 202 | . |
52b219b5 AM |
203 | . {* The section contains constructor information. This section |
204 | . type is used by the linker to create lists of constructors and | |
205 | . destructors used by <<g++>>. When a back end sees a symbol | |
206 | . which should be used in a constructor list, it creates a new | |
207 | . section for the type of name (e.g., <<__CTOR_LIST__>>), attaches | |
208 | . the symbol to it, and builds a relocation. To build the lists | |
209 | . of constructors, all the linker has to do is catenate all the | |
210 | . sections called <<__CTOR_LIST__>> and relocate the data | |
211 | . contained within - exactly the operations it would peform on | |
212 | . standard data. *} | |
ebe372c1 | 213 | .#define SEC_CONSTRUCTOR 0x080 |
252b5132 | 214 | . |
52b219b5 AM |
215 | . {* The section has contents - a data section could be |
216 | . <<SEC_ALLOC>> | <<SEC_HAS_CONTENTS>>; a debug section could be | |
217 | . <<SEC_HAS_CONTENTS>> *} | |
ebe372c1 | 218 | .#define SEC_HAS_CONTENTS 0x100 |
252b5132 | 219 | . |
52b219b5 AM |
220 | . {* An instruction to the linker to not output the section |
221 | . even if it has information which would normally be written. *} | |
ebe372c1 | 222 | .#define SEC_NEVER_LOAD 0x200 |
252b5132 | 223 | . |
13ae64f3 | 224 | . {* The section contains thread local data. *} |
ebe372c1 | 225 | .#define SEC_THREAD_LOCAL 0x400 |
13ae64f3 | 226 | . |
1bd91689 AM |
227 | . {* The section has GOT references. This flag is only for the |
228 | . linker, and is currently only used by the elf32-hppa back end. | |
229 | . It will be set if global offset table references were detected | |
230 | . in this section, which indicate to the linker that the section | |
231 | . contains PIC code, and must be handled specially when doing a | |
232 | . static link. *} | |
ebe372c1 | 233 | .#define SEC_HAS_GOT_REF 0x800 |
1bd91689 | 234 | . |
52b219b5 AM |
235 | . {* The section contains common symbols (symbols may be defined |
236 | . multiple times, the value of a symbol is the amount of | |
237 | . space it requires, and the largest symbol value is the one | |
238 | . used). Most targets have exactly one of these (which we | |
239 | . translate to bfd_com_section_ptr), but ECOFF has two. *} | |
ebe372c1 | 240 | .#define SEC_IS_COMMON 0x1000 |
252b5132 | 241 | . |
52b219b5 AM |
242 | . {* The section contains only debugging information. For |
243 | . example, this is set for ELF .debug and .stab sections. | |
244 | . strip tests this flag to see if a section can be | |
245 | . discarded. *} | |
ebe372c1 | 246 | .#define SEC_DEBUGGING 0x2000 |
252b5132 | 247 | . |
52b219b5 AM |
248 | . {* The contents of this section are held in memory pointed to |
249 | . by the contents field. This is checked by bfd_get_section_contents, | |
250 | . and the data is retrieved from memory if appropriate. *} | |
ebe372c1 | 251 | .#define SEC_IN_MEMORY 0x4000 |
252b5132 | 252 | . |
52b219b5 AM |
253 | . {* The contents of this section are to be excluded by the |
254 | . linker for executable and shared objects unless those | |
255 | . objects are to be further relocated. *} | |
ebe372c1 | 256 | .#define SEC_EXCLUDE 0x8000 |
252b5132 | 257 | . |
dbb410c3 AM |
258 | . {* The contents of this section are to be sorted based on the sum of |
259 | . the symbol and addend values specified by the associated relocation | |
260 | . entries. Entries without associated relocation entries will be | |
261 | . appended to the end of the section in an unspecified order. *} | |
ebe372c1 | 262 | .#define SEC_SORT_ENTRIES 0x10000 |
252b5132 | 263 | . |
52b219b5 AM |
264 | . {* When linking, duplicate sections of the same name should be |
265 | . discarded, rather than being combined into a single section as | |
266 | . is usually done. This is similar to how common symbols are | |
267 | . handled. See SEC_LINK_DUPLICATES below. *} | |
ebe372c1 | 268 | .#define SEC_LINK_ONCE 0x20000 |
252b5132 | 269 | . |
52b219b5 AM |
270 | . {* If SEC_LINK_ONCE is set, this bitfield describes how the linker |
271 | . should handle duplicate sections. *} | |
f856272b | 272 | .#define SEC_LINK_DUPLICATES 0xc0000 |
252b5132 | 273 | . |
52b219b5 AM |
274 | . {* This value for SEC_LINK_DUPLICATES means that duplicate |
275 | . sections with the same name should simply be discarded. *} | |
252b5132 RH |
276 | .#define SEC_LINK_DUPLICATES_DISCARD 0x0 |
277 | . | |
52b219b5 AM |
278 | . {* This value for SEC_LINK_DUPLICATES means that the linker |
279 | . should warn if there are any duplicate sections, although | |
280 | . it should still only link one copy. *} | |
f856272b | 281 | .#define SEC_LINK_DUPLICATES_ONE_ONLY 0x40000 |
252b5132 | 282 | . |
52b219b5 AM |
283 | . {* This value for SEC_LINK_DUPLICATES means that the linker |
284 | . should warn if any duplicate sections are a different size. *} | |
f856272b | 285 | .#define SEC_LINK_DUPLICATES_SAME_SIZE 0x80000 |
252b5132 | 286 | . |
52b219b5 AM |
287 | . {* This value for SEC_LINK_DUPLICATES means that the linker |
288 | . should warn if any duplicate sections contain different | |
289 | . contents. *} | |
ebe372c1 L |
290 | .#define SEC_LINK_DUPLICATES_SAME_CONTENTS \ |
291 | . (SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE) | |
252b5132 | 292 | . |
52b219b5 AM |
293 | . {* This section was created by the linker as part of dynamic |
294 | . relocation or other arcane processing. It is skipped when | |
295 | . going through the first-pass output, trusting that someone | |
296 | . else up the line will take care of it later. *} | |
f856272b | 297 | .#define SEC_LINKER_CREATED 0x100000 |
252b5132 | 298 | . |
a14a5de3 AM |
299 | . {* This section should not be subject to garbage collection. |
300 | . Also set to inform the linker that this section should not be | |
301 | . listed in the link map as discarded. *} | |
f856272b | 302 | .#define SEC_KEEP 0x200000 |
252b5132 | 303 | . |
52b219b5 AM |
304 | . {* This section contains "short" data, and should be placed |
305 | . "near" the GP. *} | |
f856272b | 306 | .#define SEC_SMALL_DATA 0x400000 |
34cbe64e | 307 | . |
2dd439c5 L |
308 | . {* Attempt to merge identical entities in the section. |
309 | . Entity size is given in the entsize field. *} | |
f856272b | 310 | .#define SEC_MERGE 0x800000 |
2dd439c5 L |
311 | . |
312 | . {* If given with SEC_MERGE, entities to merge are zero terminated | |
313 | . strings where entsize specifies character size instead of fixed | |
314 | . size entries. *} | |
f856272b | 315 | .#define SEC_STRINGS 0x1000000 |
2dd439c5 | 316 | . |
dbb410c3 | 317 | . {* This section contains data about section groups. *} |
f856272b | 318 | .#define SEC_GROUP 0x2000000 |
ebe372c1 L |
319 | . |
320 | . {* The section is a COFF shared library section. This flag is | |
321 | . only for the linker. If this type of section appears in | |
322 | . the input file, the linker must copy it to the output file | |
323 | . without changing the vma or size. FIXME: Although this | |
324 | . was originally intended to be general, it really is COFF | |
325 | . specific (and the flag was renamed to indicate this). It | |
326 | . might be cleaner to have some more general mechanism to | |
327 | . allow the back end to control what the linker does with | |
328 | . sections. *} | |
f856272b | 329 | .#define SEC_COFF_SHARED_LIBRARY 0x4000000 |
ebe372c1 | 330 | . |
310fd250 L |
331 | . {* This input section should be copied to output in reverse order |
332 | . as an array of pointers. This is for ELF linker internal use | |
333 | . only. *} | |
334 | .#define SEC_ELF_REVERSE_COPY 0x4000000 | |
335 | . | |
ebe372c1 L |
336 | . {* This section contains data which may be shared with other |
337 | . executables or shared objects. This is for COFF only. *} | |
f856272b | 338 | .#define SEC_COFF_SHARED 0x8000000 |
ebe372c1 L |
339 | . |
340 | . {* When a section with this flag is being linked, then if the size of | |
341 | . the input section is less than a page, it should not cross a page | |
342 | . boundary. If the size of the input section is one page or more, | |
343 | . it should be aligned on a page boundary. This is for TI | |
344 | . TMS320C54X only. *} | |
f856272b | 345 | .#define SEC_TIC54X_BLOCK 0x10000000 |
ebe372c1 L |
346 | . |
347 | . {* Conditionally link this section; do not link if there are no | |
348 | . references found to any symbol in the section. This is for TI | |
349 | . TMS320C54X only. *} | |
f856272b | 350 | .#define SEC_TIC54X_CLINK 0x20000000 |
dbb410c3 | 351 | . |
156621f3 KT |
352 | . {* Indicate that section has the no read flag set. This happens |
353 | . when memory read flag isn't set. *} | |
354 | .#define SEC_COFF_NOREAD 0x40000000 | |
355 | . | |
52b219b5 | 356 | . {* End of section flags. *} |
252b5132 | 357 | . |
52b219b5 | 358 | . {* Some internal packed boolean fields. *} |
252b5132 | 359 | . |
52b219b5 AM |
360 | . {* See the vma field. *} |
361 | . unsigned int user_set_vma : 1; | |
252b5132 | 362 | . |
52b219b5 AM |
363 | . {* A mark flag used by some of the linker backends. *} |
364 | . unsigned int linker_mark : 1; | |
252b5132 | 365 | . |
d1778b88 | 366 | . {* Another mark flag used by some of the linker backends. Set for |
08da05b0 | 367 | . output sections that have an input section. *} |
d1778b88 AM |
368 | . unsigned int linker_has_input : 1; |
369 | . | |
9d0a14d3 | 370 | . {* Mark flag used by some linker backends for garbage collection. *} |
52b219b5 | 371 | . unsigned int gc_mark : 1; |
252b5132 | 372 | . |
4a114e3e L |
373 | . {* Section compression status. *} |
374 | . unsigned int compress_status : 2; | |
375 | .#define COMPRESS_SECTION_NONE 0 | |
376 | .#define COMPRESS_SECTION_DONE 1 | |
377 | .#define DECOMPRESS_SECTION_SIZED 2 | |
378 | . | |
68bfbfcc AM |
379 | . {* The following flags are used by the ELF linker. *} |
380 | . | |
381 | . {* Mark sections which have been allocated to segments. *} | |
bc67d8a6 NC |
382 | . unsigned int segment_mark : 1; |
383 | . | |
68bfbfcc AM |
384 | . {* Type of sec_info information. *} |
385 | . unsigned int sec_info_type:3; | |
dbaa2011 AM |
386 | .#define SEC_INFO_TYPE_NONE 0 |
387 | .#define SEC_INFO_TYPE_STABS 1 | |
388 | .#define SEC_INFO_TYPE_MERGE 2 | |
389 | .#define SEC_INFO_TYPE_EH_FRAME 3 | |
390 | .#define SEC_INFO_TYPE_JUST_SYMS 4 | |
68bfbfcc AM |
391 | . |
392 | . {* Nonzero if this section uses RELA relocations, rather than REL. *} | |
393 | . unsigned int use_rela_p:1; | |
394 | . | |
4c52953f AM |
395 | . {* Bits used by various backends. The generic code doesn't touch |
396 | . these fields. *} | |
68bfbfcc | 397 | . |
b0dddeec AM |
398 | . unsigned int sec_flg0:1; |
399 | . unsigned int sec_flg1:1; | |
400 | . unsigned int sec_flg2:1; | |
401 | . unsigned int sec_flg3:1; | |
402 | . unsigned int sec_flg4:1; | |
403 | . unsigned int sec_flg5:1; | |
68bfbfcc | 404 | . |
52b219b5 | 405 | . {* End of internal packed boolean fields. *} |
252b5132 | 406 | . |
52b219b5 AM |
407 | . {* The virtual memory address of the section - where it will be |
408 | . at run time. The symbols are relocated against this. The | |
409 | . user_set_vma flag is maintained by bfd; if it's not set, the | |
410 | . backend can assign addresses (for example, in <<a.out>>, where | |
411 | . the default address for <<.data>> is dependent on the specific | |
412 | . target and various flags). *} | |
52b219b5 | 413 | . bfd_vma vma; |
252b5132 | 414 | . |
52b219b5 AM |
415 | . {* The load address of the section - where it would be in a |
416 | . rom image; really only used for writing section header | |
b5f79c76 | 417 | . information. *} |
52b219b5 | 418 | . bfd_vma lma; |
252b5132 | 419 | . |
52b219b5 AM |
420 | . {* The size of the section in octets, as it will be output. |
421 | . Contains a value even if the section has no contents (e.g., the | |
eea6121a AM |
422 | . size of <<.bss>>). *} |
423 | . bfd_size_type size; | |
424 | . | |
1a23a9e6 | 425 | . {* For input sections, the original size on disk of the section, in |
73c5c7a8 BW |
426 | . octets. This field should be set for any section whose size is |
427 | . changed by linker relaxation. It is required for sections where | |
428 | . the linker relaxation scheme doesn't cache altered section and | |
429 | . reloc contents (stabs, eh_frame, SEC_MERGE, some coff relaxing | |
430 | . targets), and thus the original size needs to be kept to read the | |
431 | . section multiple times. For output sections, rawsize holds the | |
432 | . section size calculated on a previous linker relaxation pass. *} | |
eea6121a | 433 | . bfd_size_type rawsize; |
252b5132 | 434 | . |
4a114e3e L |
435 | . {* The compressed size of the section in octets. *} |
436 | . bfd_size_type compressed_size; | |
437 | . | |
7ba29e2a NC |
438 | . {* Relaxation table. *} |
439 | . struct relax_table *relax; | |
440 | . | |
441 | . {* Count of used relaxation table entries. *} | |
442 | . int relax_count; | |
443 | . | |
444 | . | |
52b219b5 AM |
445 | . {* If this section is going to be output, then this value is the |
446 | . offset in *bytes* into the output section of the first byte in the | |
447 | . input section (byte ==> smallest addressable unit on the | |
448 | . target). In most cases, if this was going to start at the | |
449 | . 100th octet (8-bit quantity) in the output section, this value | |
450 | . would be 100. However, if the target byte size is 16 bits | |
451 | . (bfd_octets_per_byte is "2"), this value would be 50. *} | |
52b219b5 | 452 | . bfd_vma output_offset; |
252b5132 | 453 | . |
52b219b5 | 454 | . {* The output section through which to map on output. *} |
198beae2 | 455 | . struct bfd_section *output_section; |
252b5132 | 456 | . |
52b219b5 AM |
457 | . {* The alignment requirement of the section, as an exponent of 2 - |
458 | . e.g., 3 aligns to 2^3 (or 8). *} | |
52b219b5 | 459 | . unsigned int alignment_power; |
252b5132 | 460 | . |
52b219b5 AM |
461 | . {* If an input section, a pointer to a vector of relocation |
462 | . records for the data in this section. *} | |
52b219b5 | 463 | . struct reloc_cache_entry *relocation; |
252b5132 | 464 | . |
52b219b5 AM |
465 | . {* If an output section, a pointer to a vector of pointers to |
466 | . relocation records for the data in this section. *} | |
52b219b5 | 467 | . struct reloc_cache_entry **orelocation; |
252b5132 | 468 | . |
b5f79c76 | 469 | . {* The number of relocation records in one of the above. *} |
52b219b5 | 470 | . unsigned reloc_count; |
252b5132 | 471 | . |
52b219b5 AM |
472 | . {* Information below is back end specific - and not always used |
473 | . or updated. *} | |
252b5132 | 474 | . |
52b219b5 | 475 | . {* File position of section data. *} |
52b219b5 | 476 | . file_ptr filepos; |
252b5132 | 477 | . |
52b219b5 | 478 | . {* File position of relocation info. *} |
52b219b5 | 479 | . file_ptr rel_filepos; |
252b5132 | 480 | . |
52b219b5 | 481 | . {* File position of line data. *} |
52b219b5 | 482 | . file_ptr line_filepos; |
252b5132 | 483 | . |
52b219b5 | 484 | . {* Pointer to data for applications. *} |
c58b9523 | 485 | . void *userdata; |
252b5132 | 486 | . |
52b219b5 AM |
487 | . {* If the SEC_IN_MEMORY flag is set, this points to the actual |
488 | . contents. *} | |
489 | . unsigned char *contents; | |
252b5132 | 490 | . |
52b219b5 | 491 | . {* Attached line number information. *} |
52b219b5 | 492 | . alent *lineno; |
252b5132 | 493 | . |
52b219b5 | 494 | . {* Number of line number records. *} |
52b219b5 | 495 | . unsigned int lineno_count; |
252b5132 | 496 | . |
2dd439c5 | 497 | . {* Entity size for merging purposes. *} |
2dd439c5 L |
498 | . unsigned int entsize; |
499 | . | |
f97b9cb8 L |
500 | . {* Points to the kept section if this section is a link-once section, |
501 | . and is discarded. *} | |
198beae2 | 502 | . struct bfd_section *kept_section; |
f97b9cb8 | 503 | . |
52b219b5 AM |
504 | . {* When a section is being output, this value changes as more |
505 | . linenumbers are written out. *} | |
52b219b5 | 506 | . file_ptr moving_line_filepos; |
252b5132 | 507 | . |
52b219b5 | 508 | . {* What the section number is in the target world. *} |
52b219b5 | 509 | . int target_index; |
252b5132 | 510 | . |
c58b9523 | 511 | . void *used_by_bfd; |
252b5132 | 512 | . |
52b219b5 AM |
513 | . {* If this is a constructor section then here is a list of the |
514 | . relocations created to relocate items within it. *} | |
52b219b5 | 515 | . struct relent_chain *constructor_chain; |
252b5132 | 516 | . |
52b219b5 | 517 | . {* The BFD which owns the section. *} |
52b219b5 | 518 | . bfd *owner; |
252b5132 | 519 | . |
b5f79c76 | 520 | . {* A symbol which points at this section only. *} |
fc0a2244 AC |
521 | . struct bfd_symbol *symbol; |
522 | . struct bfd_symbol **symbol_ptr_ptr; | |
252b5132 | 523 | . |
8423293d AM |
524 | . {* Early in the link process, map_head and map_tail are used to build |
525 | . a list of input sections attached to an output section. Later, | |
526 | . output sections use these fields for a list of bfd_link_order | |
527 | . structs. *} | |
528 | . union { | |
529 | . struct bfd_link_order *link_order; | |
530 | . struct bfd_section *s; | |
531 | . } map_head, map_tail; | |
b5f79c76 | 532 | .} asection; |
252b5132 | 533 | . |
7ba29e2a | 534 | .{* Relax table contains information about instructions which can |
68ffbac6 | 535 | . be removed by relaxation -- replacing a long address with a |
7ba29e2a NC |
536 | . short address. *} |
537 | .struct relax_table { | |
538 | . {* Address where bytes may be deleted. *} | |
539 | . bfd_vma addr; | |
68ffbac6 | 540 | . |
7ba29e2a NC |
541 | . {* Number of bytes to be deleted. *} |
542 | . int size; | |
543 | .}; | |
544 | . | |
27b829ee NC |
545 | .{* Note: the following are provided as inline functions rather than macros |
546 | . because not all callers use the return value. A macro implementation | |
547 | . would use a comma expression, eg: "((ptr)->foo = val, TRUE)" and some | |
548 | . compilers will complain about comma expressions that have no effect. *} | |
549 | .static inline bfd_boolean | |
550 | .bfd_set_section_userdata (bfd * abfd ATTRIBUTE_UNUSED, asection * ptr, void * val) | |
551 | .{ | |
552 | . ptr->userdata = val; | |
553 | . return TRUE; | |
554 | .} | |
555 | . | |
556 | .static inline bfd_boolean | |
557 | .bfd_set_section_vma (bfd * abfd ATTRIBUTE_UNUSED, asection * ptr, bfd_vma val) | |
558 | .{ | |
559 | . ptr->vma = ptr->lma = val; | |
560 | . ptr->user_set_vma = TRUE; | |
561 | . return TRUE; | |
562 | .} | |
563 | . | |
564 | .static inline bfd_boolean | |
565 | .bfd_set_section_alignment (bfd * abfd ATTRIBUTE_UNUSED, asection * ptr, unsigned int val) | |
566 | .{ | |
567 | . ptr->alignment_power = val; | |
568 | . return TRUE; | |
569 | .} | |
570 | . | |
52b219b5 AM |
571 | .{* These sections are global, and are managed by BFD. The application |
572 | . and target back end are not permitted to change the values in | |
45dfa85a | 573 | . these sections. *} |
45a466b5 | 574 | .extern asection _bfd_std_section[4]; |
45dfa85a | 575 | . |
252b5132 RH |
576 | .#define BFD_ABS_SECTION_NAME "*ABS*" |
577 | .#define BFD_UND_SECTION_NAME "*UND*" | |
578 | .#define BFD_COM_SECTION_NAME "*COM*" | |
579 | .#define BFD_IND_SECTION_NAME "*IND*" | |
580 | . | |
b5f79c76 | 581 | .{* Pointer to the common section. *} |
45a466b5 | 582 | .#define bfd_com_section_ptr (&_bfd_std_section[0]) |
45dfa85a | 583 | .{* Pointer to the undefined section. *} |
45a466b5 | 584 | .#define bfd_und_section_ptr (&_bfd_std_section[1]) |
45dfa85a | 585 | .{* Pointer to the absolute section. *} |
45a466b5 | 586 | .#define bfd_abs_section_ptr (&_bfd_std_section[2]) |
b5f79c76 | 587 | .{* Pointer to the indirect section. *} |
45a466b5 | 588 | .#define bfd_ind_section_ptr (&_bfd_std_section[3]) |
45dfa85a AM |
589 | . |
590 | .#define bfd_is_und_section(sec) ((sec) == bfd_und_section_ptr) | |
591 | .#define bfd_is_abs_section(sec) ((sec) == bfd_abs_section_ptr) | |
252b5132 RH |
592 | .#define bfd_is_ind_section(sec) ((sec) == bfd_ind_section_ptr) |
593 | . | |
84c254c6 NC |
594 | .#define bfd_is_const_section(SEC) \ |
595 | . ( ((SEC) == bfd_abs_section_ptr) \ | |
596 | . || ((SEC) == bfd_und_section_ptr) \ | |
597 | . || ((SEC) == bfd_com_section_ptr) \ | |
598 | . || ((SEC) == bfd_ind_section_ptr)) | |
599 | . | |
9e7b37b3 AM |
600 | .{* Macros to handle insertion and deletion of a bfd's sections. These |
601 | . only handle the list pointers, ie. do not adjust section_count, | |
602 | . target_index etc. *} | |
5daa8fe7 L |
603 | .#define bfd_section_list_remove(ABFD, S) \ |
604 | . do \ | |
605 | . { \ | |
606 | . asection *_s = S; \ | |
607 | . asection *_next = _s->next; \ | |
608 | . asection *_prev = _s->prev; \ | |
609 | . if (_prev) \ | |
610 | . _prev->next = _next; \ | |
611 | . else \ | |
612 | . (ABFD)->sections = _next; \ | |
613 | . if (_next) \ | |
04dd1667 | 614 | . _next->prev = _prev; \ |
5daa8fe7 L |
615 | . else \ |
616 | . (ABFD)->section_last = _prev; \ | |
617 | . } \ | |
618 | . while (0) | |
619 | .#define bfd_section_list_append(ABFD, S) \ | |
9e7b37b3 AM |
620 | . do \ |
621 | . { \ | |
5daa8fe7 L |
622 | . asection *_s = S; \ |
623 | . bfd *_abfd = ABFD; \ | |
624 | . _s->next = NULL; \ | |
625 | . if (_abfd->section_last) \ | |
626 | . { \ | |
627 | . _s->prev = _abfd->section_last; \ | |
628 | . _abfd->section_last->next = _s; \ | |
629 | . } \ | |
630 | . else \ | |
04dd1667 AM |
631 | . { \ |
632 | . _s->prev = NULL; \ | |
633 | . _abfd->sections = _s; \ | |
634 | . } \ | |
5daa8fe7 L |
635 | . _abfd->section_last = _s; \ |
636 | . } \ | |
637 | . while (0) | |
04dd1667 AM |
638 | .#define bfd_section_list_prepend(ABFD, S) \ |
639 | . do \ | |
640 | . { \ | |
641 | . asection *_s = S; \ | |
642 | . bfd *_abfd = ABFD; \ | |
643 | . _s->prev = NULL; \ | |
644 | . if (_abfd->sections) \ | |
645 | . { \ | |
646 | . _s->next = _abfd->sections; \ | |
647 | . _abfd->sections->prev = _s; \ | |
648 | . } \ | |
649 | . else \ | |
650 | . { \ | |
651 | . _s->next = NULL; \ | |
652 | . _abfd->section_last = _s; \ | |
653 | . } \ | |
654 | . _abfd->sections = _s; \ | |
655 | . } \ | |
656 | . while (0) | |
5daa8fe7 L |
657 | .#define bfd_section_list_insert_after(ABFD, A, S) \ |
658 | . do \ | |
659 | . { \ | |
660 | . asection *_a = A; \ | |
661 | . asection *_s = S; \ | |
662 | . asection *_next = _a->next; \ | |
663 | . _s->next = _next; \ | |
664 | . _s->prev = _a; \ | |
665 | . _a->next = _s; \ | |
666 | . if (_next) \ | |
04dd1667 | 667 | . _next->prev = _s; \ |
ab82c5b9 | 668 | . else \ |
5daa8fe7 | 669 | . (ABFD)->section_last = _s; \ |
9e7b37b3 AM |
670 | . } \ |
671 | . while (0) | |
5daa8fe7 | 672 | .#define bfd_section_list_insert_before(ABFD, B, S) \ |
9e7b37b3 AM |
673 | . do \ |
674 | . { \ | |
5daa8fe7 | 675 | . asection *_b = B; \ |
9e7b37b3 | 676 | . asection *_s = S; \ |
5daa8fe7 L |
677 | . asection *_prev = _b->prev; \ |
678 | . _s->prev = _prev; \ | |
679 | . _s->next = _b; \ | |
680 | . _b->prev = _s; \ | |
681 | . if (_prev) \ | |
682 | . _prev->next = _s; \ | |
683 | . else \ | |
684 | . (ABFD)->sections = _s; \ | |
9e7b37b3 AM |
685 | . } \ |
686 | . while (0) | |
5daa8fe7 | 687 | .#define bfd_section_removed_from_list(ABFD, S) \ |
04dd1667 | 688 | . ((S)->next == NULL ? (ABFD)->section_last != (S) : (S)->next->prev != (S)) |
9e7b37b3 | 689 | . |
f592407e | 690 | .#define BFD_FAKE_SECTION(SEC, FLAGS, SYM, NAME, IDX) \ |
a4d8e49b L |
691 | . {* name, id, index, next, prev, flags, user_set_vma, *} \ |
692 | . { NAME, IDX, 0, NULL, NULL, FLAGS, 0, \ | |
693 | . \ | |
4a114e3e | 694 | . {* linker_mark, linker_has_input, gc_mark, decompress_status, *} \ |
b0dddeec | 695 | . 0, 0, 1, 0, \ |
a4d8e49b | 696 | . \ |
4a114e3e L |
697 | . {* segment_mark, sec_info_type, use_rela_p, *} \ |
698 | . 0, 0, 0, \ | |
a4d8e49b | 699 | . \ |
b0dddeec AM |
700 | . {* sec_flg0, sec_flg1, sec_flg2, sec_flg3, sec_flg4, sec_flg5, *} \ |
701 | . 0, 0, 0, 0, 0, 0, \ | |
a4d8e49b | 702 | . \ |
4a114e3e L |
703 | . {* vma, lma, size, rawsize, compressed_size, relax, relax_count, *} \ |
704 | . 0, 0, 0, 0, 0, 0, 0, \ | |
a4d8e49b | 705 | . \ |
45dfa85a AM |
706 | . {* output_offset, output_section, alignment_power, *} \ |
707 | . 0, &SEC, 0, \ | |
a4d8e49b L |
708 | . \ |
709 | . {* relocation, orelocation, reloc_count, filepos, rel_filepos, *} \ | |
710 | . NULL, NULL, 0, 0, 0, \ | |
711 | . \ | |
712 | . {* line_filepos, userdata, contents, lineno, lineno_count, *} \ | |
713 | . 0, NULL, NULL, NULL, 0, \ | |
714 | . \ | |
715 | . {* entsize, kept_section, moving_line_filepos, *} \ | |
716 | . 0, NULL, 0, \ | |
717 | . \ | |
718 | . {* target_index, used_by_bfd, constructor_chain, owner, *} \ | |
719 | . 0, NULL, NULL, NULL, \ | |
720 | . \ | |
f592407e AM |
721 | . {* symbol, symbol_ptr_ptr, *} \ |
722 | . (struct bfd_symbol *) SYM, &SEC.symbol, \ | |
a4d8e49b L |
723 | . \ |
724 | . {* map_head, map_tail *} \ | |
725 | . { NULL }, { NULL } \ | |
726 | . } | |
727 | . | |
252b5132 RH |
728 | */ |
729 | ||
22bc497d ILT |
730 | /* We use a macro to initialize the static asymbol structures because |
731 | traditional C does not permit us to initialize a union member while | |
732 | gcc warns if we don't initialize it. */ | |
733 | /* the_bfd, name, value, attr, section [, udata] */ | |
734 | #ifdef __STDC__ | |
735 | #define GLOBAL_SYM_INIT(NAME, SECTION) \ | |
45dfa85a | 736 | { 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 }} |
22bc497d ILT |
737 | #else |
738 | #define GLOBAL_SYM_INIT(NAME, SECTION) \ | |
45dfa85a | 739 | { 0, NAME, 0, BSF_SECTION_SYM, SECTION } |
22bc497d ILT |
740 | #endif |
741 | ||
252b5132 RH |
742 | /* These symbols are global, not specific to any BFD. Therefore, anything |
743 | that tries to change them is broken, and should be repaired. */ | |
22bc497d | 744 | |
252b5132 RH |
745 | static const asymbol global_syms[] = |
746 | { | |
45dfa85a AM |
747 | GLOBAL_SYM_INIT (BFD_COM_SECTION_NAME, bfd_com_section_ptr), |
748 | GLOBAL_SYM_INIT (BFD_UND_SECTION_NAME, bfd_und_section_ptr), | |
749 | GLOBAL_SYM_INIT (BFD_ABS_SECTION_NAME, bfd_abs_section_ptr), | |
750 | GLOBAL_SYM_INIT (BFD_IND_SECTION_NAME, bfd_ind_section_ptr) | |
252b5132 RH |
751 | }; |
752 | ||
45dfa85a | 753 | #define STD_SECTION(NAME, IDX, FLAGS) \ |
45a466b5 | 754 | BFD_FAKE_SECTION(_bfd_std_section[IDX], FLAGS, &global_syms[IDX], NAME, IDX) |
252b5132 | 755 | |
45a466b5 | 756 | asection _bfd_std_section[] = { |
45dfa85a AM |
757 | STD_SECTION (BFD_COM_SECTION_NAME, 0, SEC_IS_COMMON), |
758 | STD_SECTION (BFD_UND_SECTION_NAME, 1, 0), | |
759 | STD_SECTION (BFD_ABS_SECTION_NAME, 2, 0), | |
760 | STD_SECTION (BFD_IND_SECTION_NAME, 3, 0) | |
761 | }; | |
252b5132 RH |
762 | #undef STD_SECTION |
763 | ||
73e87d70 AM |
764 | /* Initialize an entry in the section hash table. */ |
765 | ||
766 | struct bfd_hash_entry * | |
c58b9523 AM |
767 | bfd_section_hash_newfunc (struct bfd_hash_entry *entry, |
768 | struct bfd_hash_table *table, | |
769 | const char *string) | |
73e87d70 AM |
770 | { |
771 | /* Allocate the structure if it has not already been allocated by a | |
772 | subclass. */ | |
773 | if (entry == NULL) | |
774 | { | |
d45913a0 DA |
775 | entry = (struct bfd_hash_entry *) |
776 | bfd_hash_allocate (table, sizeof (struct section_hash_entry)); | |
73e87d70 AM |
777 | if (entry == NULL) |
778 | return entry; | |
779 | } | |
780 | ||
781 | /* Call the allocation method of the superclass. */ | |
782 | entry = bfd_hash_newfunc (entry, table, string); | |
783 | if (entry != NULL) | |
c58b9523 AM |
784 | memset (&((struct section_hash_entry *) entry)->section, 0, |
785 | sizeof (asection)); | |
73e87d70 AM |
786 | |
787 | return entry; | |
788 | } | |
789 | ||
790 | #define section_hash_lookup(table, string, create, copy) \ | |
791 | ((struct section_hash_entry *) \ | |
792 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
793 | ||
f592407e AM |
794 | /* Create a symbol whose only job is to point to this section. This |
795 | is useful for things like relocs which are relative to the base | |
796 | of a section. */ | |
73e87d70 | 797 | |
f592407e AM |
798 | bfd_boolean |
799 | _bfd_generic_new_section_hook (bfd *abfd, asection *newsect) | |
73e87d70 | 800 | { |
73e87d70 AM |
801 | newsect->symbol = bfd_make_empty_symbol (abfd); |
802 | if (newsect->symbol == NULL) | |
f592407e | 803 | return FALSE; |
73e87d70 AM |
804 | |
805 | newsect->symbol->name = newsect->name; | |
806 | newsect->symbol->value = 0; | |
807 | newsect->symbol->section = newsect; | |
808 | newsect->symbol->flags = BSF_SECTION_SYM; | |
809 | ||
810 | newsect->symbol_ptr_ptr = &newsect->symbol; | |
f592407e AM |
811 | return TRUE; |
812 | } | |
813 | ||
814 | /* Initializes a new section. NEWSECT->NAME is already set. */ | |
815 | ||
816 | static asection * | |
817 | bfd_section_init (bfd *abfd, asection *newsect) | |
818 | { | |
819 | static int section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */ | |
820 | ||
821 | newsect->id = section_id; | |
822 | newsect->index = abfd->section_count; | |
823 | newsect->owner = abfd; | |
73e87d70 AM |
824 | |
825 | if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect))) | |
826 | return NULL; | |
827 | ||
828 | section_id++; | |
829 | abfd->section_count++; | |
5daa8fe7 | 830 | bfd_section_list_append (abfd, newsect); |
73e87d70 AM |
831 | return newsect; |
832 | } | |
833 | ||
252b5132 RH |
834 | /* |
835 | DOCDD | |
836 | INODE | |
837 | section prototypes, , typedef asection, Sections | |
838 | SUBSECTION | |
839 | Section prototypes | |
840 | ||
841 | These are the functions exported by the section handling part of BFD. | |
842 | */ | |
843 | ||
9e7b37b3 AM |
844 | /* |
845 | FUNCTION | |
846 | bfd_section_list_clear | |
847 | ||
848 | SYNOPSIS | |
849 | void bfd_section_list_clear (bfd *); | |
850 | ||
851 | DESCRIPTION | |
852 | Clears the section list, and also resets the section count and | |
853 | hash table entries. | |
854 | */ | |
855 | ||
856 | void | |
c58b9523 | 857 | bfd_section_list_clear (bfd *abfd) |
9e7b37b3 AM |
858 | { |
859 | abfd->sections = NULL; | |
5daa8fe7 | 860 | abfd->section_last = NULL; |
9e7b37b3 | 861 | abfd->section_count = 0; |
c58b9523 | 862 | memset (abfd->section_htab.table, 0, |
9e7b37b3 | 863 | abfd->section_htab.size * sizeof (struct bfd_hash_entry *)); |
c9ba0c87 | 864 | abfd->section_htab.count = 0; |
9e7b37b3 AM |
865 | } |
866 | ||
252b5132 RH |
867 | /* |
868 | FUNCTION | |
869 | bfd_get_section_by_name | |
870 | ||
871 | SYNOPSIS | |
c58b9523 | 872 | asection *bfd_get_section_by_name (bfd *abfd, const char *name); |
252b5132 RH |
873 | |
874 | DESCRIPTION | |
90061c33 AM |
875 | Return the most recently created section attached to @var{abfd} |
876 | named @var{name}. Return NULL if no such section exists. | |
252b5132 RH |
877 | */ |
878 | ||
879 | asection * | |
c58b9523 | 880 | bfd_get_section_by_name (bfd *abfd, const char *name) |
252b5132 | 881 | { |
73e87d70 AM |
882 | struct section_hash_entry *sh; |
883 | ||
b34976b6 | 884 | sh = section_hash_lookup (&abfd->section_htab, name, FALSE, FALSE); |
73e87d70 AM |
885 | if (sh != NULL) |
886 | return &sh->section; | |
252b5132 | 887 | |
252b5132 RH |
888 | return NULL; |
889 | } | |
890 | ||
90061c33 AM |
891 | /* |
892 | FUNCTION | |
893 | bfd_get_next_section_by_name | |
894 | ||
895 | SYNOPSIS | |
896 | asection *bfd_get_next_section_by_name (asection *sec); | |
897 | ||
898 | DESCRIPTION | |
899 | Given @var{sec} is a section returned by @code{bfd_get_section_by_name}, | |
900 | return the next most recently created section attached to the same | |
901 | BFD with the same name. Return NULL if no such section exists. | |
902 | */ | |
903 | ||
904 | asection * | |
905 | bfd_get_next_section_by_name (asection *sec) | |
906 | { | |
907 | struct section_hash_entry *sh; | |
908 | const char *name; | |
909 | unsigned long hash; | |
910 | ||
911 | sh = ((struct section_hash_entry *) | |
912 | ((char *) sec - offsetof (struct section_hash_entry, section))); | |
913 | ||
914 | hash = sh->root.hash; | |
915 | name = sec->name; | |
916 | for (sh = (struct section_hash_entry *) sh->root.next; | |
917 | sh != NULL; | |
918 | sh = (struct section_hash_entry *) sh->root.next) | |
919 | if (sh->root.hash == hash | |
920 | && strcmp (sh->root.string, name) == 0) | |
921 | return &sh->section; | |
922 | ||
923 | return NULL; | |
924 | } | |
925 | ||
3d4d4302 AM |
926 | /* |
927 | FUNCTION | |
928 | bfd_get_linker_section | |
929 | ||
930 | SYNOPSIS | |
931 | asection *bfd_get_linker_section (bfd *abfd, const char *name); | |
932 | ||
933 | DESCRIPTION | |
934 | Return the linker created section attached to @var{abfd} | |
935 | named @var{name}. Return NULL if no such section exists. | |
936 | */ | |
937 | ||
938 | asection * | |
939 | bfd_get_linker_section (bfd *abfd, const char *name) | |
940 | { | |
941 | asection *sec = bfd_get_section_by_name (abfd, name); | |
942 | ||
943 | while (sec != NULL && (sec->flags & SEC_LINKER_CREATED) == 0) | |
944 | sec = bfd_get_next_section_by_name (sec); | |
945 | return sec; | |
946 | } | |
947 | ||
fafe6678 L |
948 | /* |
949 | FUNCTION | |
950 | bfd_get_section_by_name_if | |
951 | ||
952 | SYNOPSIS | |
953 | asection *bfd_get_section_by_name_if | |
954 | (bfd *abfd, | |
955 | const char *name, | |
956 | bfd_boolean (*func) (bfd *abfd, asection *sect, void *obj), | |
957 | void *obj); | |
958 | ||
959 | DESCRIPTION | |
960 | Call the provided function @var{func} for each section | |
961 | attached to the BFD @var{abfd} whose name matches @var{name}, | |
962 | passing @var{obj} as an argument. The function will be called | |
963 | as if by | |
964 | ||
965 | | func (abfd, the_section, obj); | |
966 | ||
967 | It returns the first section for which @var{func} returns true, | |
968 | otherwise <<NULL>>. | |
969 | ||
970 | */ | |
971 | ||
972 | asection * | |
973 | bfd_get_section_by_name_if (bfd *abfd, const char *name, | |
974 | bfd_boolean (*operation) (bfd *, | |
975 | asection *, | |
976 | void *), | |
977 | void *user_storage) | |
978 | { | |
979 | struct section_hash_entry *sh; | |
980 | unsigned long hash; | |
981 | ||
982 | sh = section_hash_lookup (&abfd->section_htab, name, FALSE, FALSE); | |
983 | if (sh == NULL) | |
984 | return NULL; | |
985 | ||
986 | hash = sh->root.hash; | |
987 | do | |
988 | { | |
989 | if ((*operation) (abfd, &sh->section, user_storage)) | |
990 | return &sh->section; | |
991 | sh = (struct section_hash_entry *) sh->root.next; | |
992 | } | |
993 | while (sh != NULL && sh->root.hash == hash | |
994 | && strcmp (sh->root.string, name) == 0); | |
995 | ||
996 | return NULL; | |
997 | } | |
998 | ||
1bd91689 AM |
999 | /* |
1000 | FUNCTION | |
1001 | bfd_get_unique_section_name | |
1002 | ||
1003 | SYNOPSIS | |
c58b9523 AM |
1004 | char *bfd_get_unique_section_name |
1005 | (bfd *abfd, const char *templat, int *count); | |
1bd91689 AM |
1006 | |
1007 | DESCRIPTION | |
1008 | Invent a section name that is unique in @var{abfd} by tacking | |
77cb06e9 AM |
1009 | a dot and a digit suffix onto the original @var{templat}. If |
1010 | @var{count} is non-NULL, then it specifies the first number | |
1011 | tried as a suffix to generate a unique name. The value | |
1012 | pointed to by @var{count} will be incremented in this case. | |
1bd91689 AM |
1013 | */ |
1014 | ||
1015 | char * | |
c58b9523 | 1016 | bfd_get_unique_section_name (bfd *abfd, const char *templat, int *count) |
1bd91689 AM |
1017 | { |
1018 | int num; | |
1019 | unsigned int len; | |
1020 | char *sname; | |
1021 | ||
a966dba9 | 1022 | len = strlen (templat); |
a50b1753 | 1023 | sname = (char *) bfd_malloc (len + 8); |
b3ea3584 AM |
1024 | if (sname == NULL) |
1025 | return NULL; | |
d4c88bbb | 1026 | memcpy (sname, templat, len); |
1bd91689 AM |
1027 | num = 1; |
1028 | if (count != NULL) | |
1029 | num = *count; | |
1030 | ||
1031 | do | |
1032 | { | |
1033 | /* If we have a million sections, something is badly wrong. */ | |
1034 | if (num > 999999) | |
1035 | abort (); | |
77cb06e9 | 1036 | sprintf (sname + len, ".%d", num++); |
1bd91689 | 1037 | } |
b34976b6 | 1038 | while (section_hash_lookup (&abfd->section_htab, sname, FALSE, FALSE)); |
1bd91689 AM |
1039 | |
1040 | if (count != NULL) | |
1041 | *count = num; | |
1042 | return sname; | |
1043 | } | |
1044 | ||
252b5132 RH |
1045 | /* |
1046 | FUNCTION | |
1047 | bfd_make_section_old_way | |
1048 | ||
1049 | SYNOPSIS | |
c58b9523 | 1050 | asection *bfd_make_section_old_way (bfd *abfd, const char *name); |
252b5132 RH |
1051 | |
1052 | DESCRIPTION | |
1053 | Create a new empty section called @var{name} | |
1054 | and attach it to the end of the chain of sections for the | |
1055 | BFD @var{abfd}. An attempt to create a section with a name which | |
1056 | is already in use returns its pointer without changing the | |
1057 | section chain. | |
1058 | ||
1059 | It has the funny name since this is the way it used to be | |
1060 | before it was rewritten.... | |
1061 | ||
1062 | Possible errors are: | |
1063 | o <<bfd_error_invalid_operation>> - | |
1064 | If output has already started for this BFD. | |
1065 | o <<bfd_error_no_memory>> - | |
1066 | If memory allocation fails. | |
1067 | ||
1068 | */ | |
1069 | ||
252b5132 | 1070 | asection * |
c58b9523 | 1071 | bfd_make_section_old_way (bfd *abfd, const char *name) |
252b5132 | 1072 | { |
73e87d70 AM |
1073 | asection *newsect; |
1074 | ||
1075 | if (abfd->output_has_begun) | |
1076 | { | |
1077 | bfd_set_error (bfd_error_invalid_operation); | |
1078 | return NULL; | |
1079 | } | |
1080 | ||
1081 | if (strcmp (name, BFD_ABS_SECTION_NAME) == 0) | |
f592407e AM |
1082 | newsect = bfd_abs_section_ptr; |
1083 | else if (strcmp (name, BFD_COM_SECTION_NAME) == 0) | |
1084 | newsect = bfd_com_section_ptr; | |
1085 | else if (strcmp (name, BFD_UND_SECTION_NAME) == 0) | |
1086 | newsect = bfd_und_section_ptr; | |
1087 | else if (strcmp (name, BFD_IND_SECTION_NAME) == 0) | |
1088 | newsect = bfd_ind_section_ptr; | |
1089 | else | |
1090 | { | |
1091 | struct section_hash_entry *sh; | |
73e87d70 | 1092 | |
f592407e AM |
1093 | sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE); |
1094 | if (sh == NULL) | |
1095 | return NULL; | |
73e87d70 | 1096 | |
f592407e AM |
1097 | newsect = &sh->section; |
1098 | if (newsect->name != NULL) | |
1099 | { | |
1100 | /* Section already exists. */ | |
1101 | return newsect; | |
1102 | } | |
73e87d70 | 1103 | |
f592407e AM |
1104 | newsect->name = name; |
1105 | return bfd_section_init (abfd, newsect); | |
252b5132 | 1106 | } |
73e87d70 | 1107 | |
f592407e AM |
1108 | /* Call new_section_hook when "creating" the standard abs, com, und |
1109 | and ind sections to tack on format specific section data. | |
1110 | Also, create a proper section symbol. */ | |
1111 | if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect))) | |
1112 | return NULL; | |
1113 | return newsect; | |
252b5132 RH |
1114 | } |
1115 | ||
1116 | /* | |
1117 | FUNCTION | |
3496cb2a | 1118 | bfd_make_section_anyway_with_flags |
252b5132 RH |
1119 | |
1120 | SYNOPSIS | |
3496cb2a L |
1121 | asection *bfd_make_section_anyway_with_flags |
1122 | (bfd *abfd, const char *name, flagword flags); | |
252b5132 RH |
1123 | |
1124 | DESCRIPTION | |
1125 | Create a new empty section called @var{name} and attach it to the end of | |
1126 | the chain of sections for @var{abfd}. Create a new section even if there | |
3496cb2a L |
1127 | is already a section with that name. Also set the attributes of the |
1128 | new section to the value @var{flags}. | |
252b5132 RH |
1129 | |
1130 | Return <<NULL>> and set <<bfd_error>> on error; possible errors are: | |
1131 | o <<bfd_error_invalid_operation>> - If output has already started for @var{abfd}. | |
1132 | o <<bfd_error_no_memory>> - If memory allocation fails. | |
1133 | */ | |
1134 | ||
1135 | sec_ptr | |
3496cb2a L |
1136 | bfd_make_section_anyway_with_flags (bfd *abfd, const char *name, |
1137 | flagword flags) | |
252b5132 | 1138 | { |
73e87d70 | 1139 | struct section_hash_entry *sh; |
252b5132 | 1140 | asection *newsect; |
252b5132 RH |
1141 | |
1142 | if (abfd->output_has_begun) | |
1143 | { | |
1144 | bfd_set_error (bfd_error_invalid_operation); | |
1145 | return NULL; | |
1146 | } | |
1147 | ||
b34976b6 | 1148 | sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE); |
73e87d70 | 1149 | if (sh == NULL) |
252b5132 RH |
1150 | return NULL; |
1151 | ||
73e87d70 AM |
1152 | newsect = &sh->section; |
1153 | if (newsect->name != NULL) | |
4d7ce4dd | 1154 | { |
72adc230 AM |
1155 | /* We are making a section of the same name. Put it in the |
1156 | section hash table. Even though we can't find it directly by a | |
1157 | hash lookup, we'll be able to find the section by traversing | |
1158 | sh->root.next quicker than looking at all the bfd sections. */ | |
1159 | struct section_hash_entry *new_sh; | |
1160 | new_sh = (struct section_hash_entry *) | |
1161 | bfd_section_hash_newfunc (NULL, &abfd->section_htab, name); | |
1162 | if (new_sh == NULL) | |
73e87d70 | 1163 | return NULL; |
72adc230 | 1164 | |
73499ab8 | 1165 | new_sh->root = sh->root; |
72adc230 AM |
1166 | sh->root.next = &new_sh->root; |
1167 | newsect = &new_sh->section; | |
252b5132 RH |
1168 | } |
1169 | ||
3496cb2a | 1170 | newsect->flags = flags; |
73e87d70 AM |
1171 | newsect->name = name; |
1172 | return bfd_section_init (abfd, newsect); | |
252b5132 RH |
1173 | } |
1174 | ||
1175 | /* | |
1176 | FUNCTION | |
3496cb2a | 1177 | bfd_make_section_anyway |
252b5132 RH |
1178 | |
1179 | SYNOPSIS | |
3496cb2a L |
1180 | asection *bfd_make_section_anyway (bfd *abfd, const char *name); |
1181 | ||
1182 | DESCRIPTION | |
1183 | Create a new empty section called @var{name} and attach it to the end of | |
1184 | the chain of sections for @var{abfd}. Create a new section even if there | |
1185 | is already a section with that name. | |
1186 | ||
1187 | Return <<NULL>> and set <<bfd_error>> on error; possible errors are: | |
1188 | o <<bfd_error_invalid_operation>> - If output has already started for @var{abfd}. | |
1189 | o <<bfd_error_no_memory>> - If memory allocation fails. | |
1190 | */ | |
1191 | ||
1192 | sec_ptr | |
1193 | bfd_make_section_anyway (bfd *abfd, const char *name) | |
1194 | { | |
1195 | return bfd_make_section_anyway_with_flags (abfd, name, 0); | |
1196 | } | |
1197 | ||
1198 | /* | |
1199 | FUNCTION | |
1200 | bfd_make_section_with_flags | |
1201 | ||
1202 | SYNOPSIS | |
1203 | asection *bfd_make_section_with_flags | |
1204 | (bfd *, const char *name, flagword flags); | |
252b5132 RH |
1205 | |
1206 | DESCRIPTION | |
1207 | Like <<bfd_make_section_anyway>>, but return <<NULL>> (without calling | |
1208 | bfd_set_error ()) without changing the section chain if there is already a | |
3496cb2a L |
1209 | section named @var{name}. Also set the attributes of the new section to |
1210 | the value @var{flags}. If there is an error, return <<NULL>> and set | |
252b5132 RH |
1211 | <<bfd_error>>. |
1212 | */ | |
1213 | ||
1214 | asection * | |
3496cb2a L |
1215 | bfd_make_section_with_flags (bfd *abfd, const char *name, |
1216 | flagword flags) | |
252b5132 | 1217 | { |
73e87d70 AM |
1218 | struct section_hash_entry *sh; |
1219 | asection *newsect; | |
252b5132 | 1220 | |
73e87d70 | 1221 | if (abfd->output_has_begun) |
252b5132 | 1222 | { |
73e87d70 AM |
1223 | bfd_set_error (bfd_error_invalid_operation); |
1224 | return NULL; | |
252b5132 RH |
1225 | } |
1226 | ||
73e87d70 AM |
1227 | if (strcmp (name, BFD_ABS_SECTION_NAME) == 0 |
1228 | || strcmp (name, BFD_COM_SECTION_NAME) == 0 | |
1229 | || strcmp (name, BFD_UND_SECTION_NAME) == 0 | |
1230 | || strcmp (name, BFD_IND_SECTION_NAME) == 0) | |
1231 | return NULL; | |
252b5132 | 1232 | |
b34976b6 | 1233 | sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE); |
73e87d70 AM |
1234 | if (sh == NULL) |
1235 | return NULL; | |
1236 | ||
1237 | newsect = &sh->section; | |
1238 | if (newsect->name != NULL) | |
252b5132 | 1239 | { |
73e87d70 | 1240 | /* Section already exists. */ |
003d627e | 1241 | return NULL; |
252b5132 RH |
1242 | } |
1243 | ||
73e87d70 | 1244 | newsect->name = name; |
3496cb2a | 1245 | newsect->flags = flags; |
73e87d70 | 1246 | return bfd_section_init (abfd, newsect); |
252b5132 RH |
1247 | } |
1248 | ||
3496cb2a L |
1249 | /* |
1250 | FUNCTION | |
1251 | bfd_make_section | |
1252 | ||
1253 | SYNOPSIS | |
1254 | asection *bfd_make_section (bfd *, const char *name); | |
1255 | ||
1256 | DESCRIPTION | |
1257 | Like <<bfd_make_section_anyway>>, but return <<NULL>> (without calling | |
1258 | bfd_set_error ()) without changing the section chain if there is already a | |
1259 | section named @var{name}. If there is an error, return <<NULL>> and set | |
1260 | <<bfd_error>>. | |
1261 | */ | |
1262 | ||
1263 | asection * | |
1264 | bfd_make_section (bfd *abfd, const char *name) | |
1265 | { | |
1266 | return bfd_make_section_with_flags (abfd, name, 0); | |
1267 | } | |
1268 | ||
252b5132 RH |
1269 | /* |
1270 | FUNCTION | |
1271 | bfd_set_section_flags | |
1272 | ||
1273 | SYNOPSIS | |
c58b9523 AM |
1274 | bfd_boolean bfd_set_section_flags |
1275 | (bfd *abfd, asection *sec, flagword flags); | |
252b5132 RH |
1276 | |
1277 | DESCRIPTION | |
1278 | Set the attributes of the section @var{sec} in the BFD | |
b34976b6 AM |
1279 | @var{abfd} to the value @var{flags}. Return <<TRUE>> on success, |
1280 | <<FALSE>> on error. Possible error returns are: | |
252b5132 RH |
1281 | |
1282 | o <<bfd_error_invalid_operation>> - | |
1283 | The section cannot have one or more of the attributes | |
1284 | requested. For example, a .bss section in <<a.out>> may not | |
1285 | have the <<SEC_HAS_CONTENTS>> field set. | |
1286 | ||
1287 | */ | |
1288 | ||
b34976b6 | 1289 | bfd_boolean |
c58b9523 AM |
1290 | bfd_set_section_flags (bfd *abfd ATTRIBUTE_UNUSED, |
1291 | sec_ptr section, | |
1292 | flagword flags) | |
252b5132 | 1293 | { |
252b5132 | 1294 | section->flags = flags; |
b34976b6 | 1295 | return TRUE; |
252b5132 RH |
1296 | } |
1297 | ||
4e011fb5 AM |
1298 | /* |
1299 | FUNCTION | |
1300 | bfd_rename_section | |
1301 | ||
1302 | SYNOPSIS | |
1303 | void bfd_rename_section | |
1304 | (bfd *abfd, asection *sec, const char *newname); | |
1305 | ||
1306 | DESCRIPTION | |
1307 | Rename section @var{sec} in @var{abfd} to @var{newname}. | |
1308 | */ | |
1309 | ||
1310 | void | |
1311 | bfd_rename_section (bfd *abfd, sec_ptr sec, const char *newname) | |
1312 | { | |
1313 | struct section_hash_entry *sh; | |
1314 | ||
1315 | sh = (struct section_hash_entry *) | |
1316 | ((char *) sec - offsetof (struct section_hash_entry, section)); | |
1317 | sh->section.name = newname; | |
1318 | bfd_hash_rename (&abfd->section_htab, newname, &sh->root); | |
1319 | } | |
1320 | ||
252b5132 RH |
1321 | /* |
1322 | FUNCTION | |
1323 | bfd_map_over_sections | |
1324 | ||
1325 | SYNOPSIS | |
c58b9523 AM |
1326 | void bfd_map_over_sections |
1327 | (bfd *abfd, | |
1328 | void (*func) (bfd *abfd, asection *sect, void *obj), | |
1329 | void *obj); | |
252b5132 RH |
1330 | |
1331 | DESCRIPTION | |
1332 | Call the provided function @var{func} for each section | |
1333 | attached to the BFD @var{abfd}, passing @var{obj} as an | |
1334 | argument. The function will be called as if by | |
1335 | ||
c58b9523 | 1336 | | func (abfd, the_section, obj); |
252b5132 | 1337 | |
7dee875e | 1338 | This is the preferred method for iterating over sections; an |
252b5132 RH |
1339 | alternative would be to use a loop: |
1340 | ||
c06fc9eb | 1341 | | asection *p; |
252b5132 | 1342 | | for (p = abfd->sections; p != NULL; p = p->next) |
c58b9523 | 1343 | | func (abfd, p, ...) |
252b5132 | 1344 | |
252b5132 RH |
1345 | */ |
1346 | ||
252b5132 | 1347 | void |
c58b9523 AM |
1348 | bfd_map_over_sections (bfd *abfd, |
1349 | void (*operation) (bfd *, asection *, void *), | |
1350 | void *user_storage) | |
252b5132 RH |
1351 | { |
1352 | asection *sect; | |
1353 | unsigned int i = 0; | |
1354 | ||
1355 | for (sect = abfd->sections; sect != NULL; i++, sect = sect->next) | |
1356 | (*operation) (abfd, sect, user_storage); | |
1357 | ||
1358 | if (i != abfd->section_count) /* Debugging */ | |
1359 | abort (); | |
1360 | } | |
1361 | ||
bc87dd2e L |
1362 | /* |
1363 | FUNCTION | |
1364 | bfd_sections_find_if | |
1365 | ||
1366 | SYNOPSIS | |
1367 | asection *bfd_sections_find_if | |
1368 | (bfd *abfd, | |
f4eae89c | 1369 | bfd_boolean (*operation) (bfd *abfd, asection *sect, void *obj), |
bc87dd2e L |
1370 | void *obj); |
1371 | ||
1372 | DESCRIPTION | |
f4eae89c | 1373 | Call the provided function @var{operation} for each section |
bc87dd2e L |
1374 | attached to the BFD @var{abfd}, passing @var{obj} as an |
1375 | argument. The function will be called as if by | |
1376 | ||
f4eae89c | 1377 | | operation (abfd, the_section, obj); |
bc87dd2e | 1378 | |
f4eae89c | 1379 | It returns the first section for which @var{operation} returns true. |
bc87dd2e L |
1380 | |
1381 | */ | |
1382 | ||
1383 | asection * | |
1384 | bfd_sections_find_if (bfd *abfd, | |
1385 | bfd_boolean (*operation) (bfd *, asection *, void *), | |
1386 | void *user_storage) | |
1387 | { | |
1388 | asection *sect; | |
1389 | ||
1390 | for (sect = abfd->sections; sect != NULL; sect = sect->next) | |
1391 | if ((*operation) (abfd, sect, user_storage)) | |
1392 | break; | |
1393 | ||
1394 | return sect; | |
1395 | } | |
1396 | ||
252b5132 RH |
1397 | /* |
1398 | FUNCTION | |
1399 | bfd_set_section_size | |
1400 | ||
1401 | SYNOPSIS | |
c58b9523 AM |
1402 | bfd_boolean bfd_set_section_size |
1403 | (bfd *abfd, asection *sec, bfd_size_type val); | |
252b5132 RH |
1404 | |
1405 | DESCRIPTION | |
1406 | Set @var{sec} to the size @var{val}. If the operation is | |
b34976b6 | 1407 | ok, then <<TRUE>> is returned, else <<FALSE>>. |
252b5132 RH |
1408 | |
1409 | Possible error returns: | |
1410 | o <<bfd_error_invalid_operation>> - | |
1411 | Writing has started to the BFD, so setting the size is invalid. | |
1412 | ||
1413 | */ | |
1414 | ||
b34976b6 | 1415 | bfd_boolean |
c58b9523 | 1416 | bfd_set_section_size (bfd *abfd, sec_ptr ptr, bfd_size_type val) |
252b5132 RH |
1417 | { |
1418 | /* Once you've started writing to any section you cannot create or change | |
7b82c249 | 1419 | the size of any others. */ |
252b5132 RH |
1420 | |
1421 | if (abfd->output_has_begun) | |
1422 | { | |
1423 | bfd_set_error (bfd_error_invalid_operation); | |
b34976b6 | 1424 | return FALSE; |
252b5132 RH |
1425 | } |
1426 | ||
eea6121a | 1427 | ptr->size = val; |
b34976b6 | 1428 | return TRUE; |
252b5132 RH |
1429 | } |
1430 | ||
1431 | /* | |
1432 | FUNCTION | |
1433 | bfd_set_section_contents | |
1434 | ||
1435 | SYNOPSIS | |
c58b9523 | 1436 | bfd_boolean bfd_set_section_contents |
85302095 AC |
1437 | (bfd *abfd, asection *section, const void *data, |
1438 | file_ptr offset, bfd_size_type count); | |
252b5132 | 1439 | |
252b5132 RH |
1440 | DESCRIPTION |
1441 | Sets the contents of the section @var{section} in BFD | |
1442 | @var{abfd} to the data starting in memory at @var{data}. The | |
1443 | data is written to the output section starting at offset | |
9a968f43 | 1444 | @var{offset} for @var{count} octets. |
252b5132 | 1445 | |
b34976b6 | 1446 | Normally <<TRUE>> is returned, else <<FALSE>>. Possible error |
252b5132 RH |
1447 | returns are: |
1448 | o <<bfd_error_no_contents>> - | |
1449 | The output section does not have the <<SEC_HAS_CONTENTS>> | |
1450 | attribute, so nothing can be written to it. | |
1451 | o and some more too | |
1452 | ||
1453 | This routine is front end to the back end function | |
1454 | <<_bfd_set_section_contents>>. | |
1455 | ||
252b5132 RH |
1456 | */ |
1457 | ||
b34976b6 | 1458 | bfd_boolean |
c58b9523 AM |
1459 | bfd_set_section_contents (bfd *abfd, |
1460 | sec_ptr section, | |
85302095 | 1461 | const void *location, |
c58b9523 AM |
1462 | file_ptr offset, |
1463 | bfd_size_type count) | |
252b5132 RH |
1464 | { |
1465 | bfd_size_type sz; | |
1466 | ||
1467 | if (!(bfd_get_section_flags (abfd, section) & SEC_HAS_CONTENTS)) | |
1468 | { | |
1469 | bfd_set_error (bfd_error_no_contents); | |
b34976b6 | 1470 | return FALSE; |
252b5132 RH |
1471 | } |
1472 | ||
eea6121a | 1473 | sz = section->size; |
dc810e39 AM |
1474 | if ((bfd_size_type) offset > sz |
1475 | || count > sz | |
1476 | || offset + count > sz | |
1477 | || count != (size_t) count) | |
252b5132 | 1478 | { |
252b5132 | 1479 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 1480 | return FALSE; |
252b5132 | 1481 | } |
252b5132 | 1482 | |
26ae6d5e | 1483 | if (!bfd_write_p (abfd)) |
252b5132 | 1484 | { |
252b5132 | 1485 | bfd_set_error (bfd_error_invalid_operation); |
b34976b6 | 1486 | return FALSE; |
252b5132 RH |
1487 | } |
1488 | ||
9a951beb RH |
1489 | /* Record a copy of the data in memory if desired. */ |
1490 | if (section->contents | |
c58b9523 | 1491 | && location != section->contents + offset) |
dc810e39 | 1492 | memcpy (section->contents + offset, location, (size_t) count); |
9a951beb | 1493 | |
252b5132 RH |
1494 | if (BFD_SEND (abfd, _bfd_set_section_contents, |
1495 | (abfd, section, location, offset, count))) | |
1496 | { | |
b34976b6 AM |
1497 | abfd->output_has_begun = TRUE; |
1498 | return TRUE; | |
252b5132 RH |
1499 | } |
1500 | ||
b34976b6 | 1501 | return FALSE; |
252b5132 RH |
1502 | } |
1503 | ||
1504 | /* | |
1505 | FUNCTION | |
1506 | bfd_get_section_contents | |
1507 | ||
1508 | SYNOPSIS | |
c58b9523 AM |
1509 | bfd_boolean bfd_get_section_contents |
1510 | (bfd *abfd, asection *section, void *location, file_ptr offset, | |
1511 | bfd_size_type count); | |
252b5132 RH |
1512 | |
1513 | DESCRIPTION | |
1514 | Read data from @var{section} in BFD @var{abfd} | |
1515 | into memory starting at @var{location}. The data is read at an | |
1516 | offset of @var{offset} from the start of the input section, | |
1517 | and is read for @var{count} bytes. | |
1518 | ||
1519 | If the contents of a constructor with the <<SEC_CONSTRUCTOR>> | |
1520 | flag set are requested or if the section does not have the | |
1521 | <<SEC_HAS_CONTENTS>> flag set, then the @var{location} is filled | |
b34976b6 AM |
1522 | with zeroes. If no errors occur, <<TRUE>> is returned, else |
1523 | <<FALSE>>. | |
252b5132 | 1524 | |
252b5132 | 1525 | */ |
b34976b6 | 1526 | bfd_boolean |
c58b9523 AM |
1527 | bfd_get_section_contents (bfd *abfd, |
1528 | sec_ptr section, | |
1529 | void *location, | |
1530 | file_ptr offset, | |
1531 | bfd_size_type count) | |
252b5132 RH |
1532 | { |
1533 | bfd_size_type sz; | |
1534 | ||
1535 | if (section->flags & SEC_CONSTRUCTOR) | |
1536 | { | |
dc810e39 | 1537 | memset (location, 0, (size_t) count); |
b34976b6 | 1538 | return TRUE; |
252b5132 RH |
1539 | } |
1540 | ||
e57278ef AM |
1541 | if (abfd->direction != write_direction && section->rawsize != 0) |
1542 | sz = section->rawsize; | |
1543 | else | |
1544 | sz = section->size; | |
dc810e39 AM |
1545 | if ((bfd_size_type) offset > sz |
1546 | || count > sz | |
1547 | || offset + count > sz | |
1548 | || count != (size_t) count) | |
252b5132 | 1549 | { |
252b5132 | 1550 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 1551 | return FALSE; |
252b5132 | 1552 | } |
252b5132 RH |
1553 | |
1554 | if (count == 0) | |
1555 | /* Don't bother. */ | |
b34976b6 | 1556 | return TRUE; |
252b5132 RH |
1557 | |
1558 | if ((section->flags & SEC_HAS_CONTENTS) == 0) | |
1559 | { | |
dc810e39 | 1560 | memset (location, 0, (size_t) count); |
b34976b6 | 1561 | return TRUE; |
252b5132 RH |
1562 | } |
1563 | ||
1564 | if ((section->flags & SEC_IN_MEMORY) != 0) | |
1565 | { | |
ea882e87 NC |
1566 | if (section->contents == NULL) |
1567 | { | |
1568 | /* This can happen because of errors earlier on in the linking process. | |
1569 | We do not want to seg-fault here, so clear the flag and return an | |
1570 | error code. */ | |
1571 | section->flags &= ~ SEC_IN_MEMORY; | |
1572 | bfd_set_error (bfd_error_invalid_operation); | |
1573 | return FALSE; | |
1574 | } | |
68ffbac6 | 1575 | |
ddda4adc | 1576 | memmove (location, section->contents + offset, (size_t) count); |
b34976b6 | 1577 | return TRUE; |
252b5132 RH |
1578 | } |
1579 | ||
1580 | return BFD_SEND (abfd, _bfd_get_section_contents, | |
1581 | (abfd, section, location, offset, count)); | |
1582 | } | |
1583 | ||
eea6121a AM |
1584 | /* |
1585 | FUNCTION | |
1586 | bfd_malloc_and_get_section | |
1587 | ||
1588 | SYNOPSIS | |
1589 | bfd_boolean bfd_malloc_and_get_section | |
1590 | (bfd *abfd, asection *section, bfd_byte **buf); | |
1591 | ||
1592 | DESCRIPTION | |
1593 | Read all data from @var{section} in BFD @var{abfd} | |
1594 | into a buffer, *@var{buf}, malloc'd by this function. | |
1595 | */ | |
1596 | ||
1597 | bfd_boolean | |
1598 | bfd_malloc_and_get_section (bfd *abfd, sec_ptr sec, bfd_byte **buf) | |
1599 | { | |
4a114e3e L |
1600 | *buf = NULL; |
1601 | return bfd_get_full_section_contents (abfd, sec, buf); | |
eea6121a | 1602 | } |
252b5132 RH |
1603 | /* |
1604 | FUNCTION | |
1605 | bfd_copy_private_section_data | |
1606 | ||
1607 | SYNOPSIS | |
c58b9523 AM |
1608 | bfd_boolean bfd_copy_private_section_data |
1609 | (bfd *ibfd, asection *isec, bfd *obfd, asection *osec); | |
252b5132 RH |
1610 | |
1611 | DESCRIPTION | |
1612 | Copy private section information from @var{isec} in the BFD | |
1613 | @var{ibfd} to the section @var{osec} in the BFD @var{obfd}. | |
b34976b6 | 1614 | Return <<TRUE>> on success, <<FALSE>> on error. Possible error |
252b5132 RH |
1615 | returns are: |
1616 | ||
1617 | o <<bfd_error_no_memory>> - | |
1618 | Not enough memory exists to create private data for @var{osec}. | |
1619 | ||
1620 | .#define bfd_copy_private_section_data(ibfd, isection, obfd, osection) \ | |
1621 | . BFD_SEND (obfd, _bfd_copy_private_section_data, \ | |
1622 | . (ibfd, isection, obfd, osection)) | |
1623 | */ | |
1624 | ||
72adc230 AM |
1625 | /* |
1626 | FUNCTION | |
1627 | bfd_generic_is_group_section | |
1628 | ||
1629 | SYNOPSIS | |
1630 | bfd_boolean bfd_generic_is_group_section (bfd *, const asection *sec); | |
1631 | ||
1632 | DESCRIPTION | |
1633 | Returns TRUE if @var{sec} is a member of a group. | |
1634 | */ | |
1635 | ||
1636 | bfd_boolean | |
1637 | bfd_generic_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, | |
1638 | const asection *sec ATTRIBUTE_UNUSED) | |
1639 | { | |
1640 | return FALSE; | |
1641 | } | |
1642 | ||
b885599b AM |
1643 | /* |
1644 | FUNCTION | |
e61463e1 | 1645 | bfd_generic_discard_group |
b885599b AM |
1646 | |
1647 | SYNOPSIS | |
b34976b6 | 1648 | bfd_boolean bfd_generic_discard_group (bfd *abfd, asection *group); |
b885599b AM |
1649 | |
1650 | DESCRIPTION | |
1651 | Remove all members of @var{group} from the output. | |
1652 | */ | |
1653 | ||
b34976b6 | 1654 | bfd_boolean |
c58b9523 AM |
1655 | bfd_generic_discard_group (bfd *abfd ATTRIBUTE_UNUSED, |
1656 | asection *group ATTRIBUTE_UNUSED) | |
b885599b | 1657 | { |
b34976b6 | 1658 | return TRUE; |
b885599b | 1659 | } |