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252b5132 | 1 | /* Object file "section" support for the BFD library. |
250d07de | 2 | Copyright (C) 1990-2021 Free Software Foundation, Inc. |
252b5132 RH |
3 | Written by Cygnus Support. |
4 | ||
cd123cb7 NC |
5 | This file is part of BFD, the Binary File Descriptor library. |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
252b5132 RH |
21 | |
22 | /* | |
23 | SECTION | |
24 | Sections | |
25 | ||
26 | The raw data contained within a BFD is maintained through the | |
27 | section abstraction. A single BFD may have any number of | |
28 | sections. It keeps hold of them by pointing to the first; | |
29 | each one points to the next in the list. | |
30 | ||
31 | Sections are supported in BFD in <<section.c>>. | |
32 | ||
33 | @menu | |
34 | @* Section Input:: | |
35 | @* Section Output:: | |
36 | @* typedef asection:: | |
37 | @* section prototypes:: | |
38 | @end menu | |
39 | ||
40 | INODE | |
41 | Section Input, Section Output, Sections, Sections | |
42 | SUBSECTION | |
43 | Section input | |
44 | ||
45 | When a BFD is opened for reading, the section structures are | |
46 | created and attached to the BFD. | |
47 | ||
48 | Each section has a name which describes the section in the | |
49 | outside world---for example, <<a.out>> would contain at least | |
50 | three sections, called <<.text>>, <<.data>> and <<.bss>>. | |
51 | ||
52 | Names need not be unique; for example a COFF file may have several | |
53 | sections named <<.data>>. | |
54 | ||
55 | Sometimes a BFD will contain more than the ``natural'' number of | |
56 | sections. A back end may attach other sections containing | |
57 | constructor data, or an application may add a section (using | |
58 | <<bfd_make_section>>) to the sections attached to an already open | |
59 | BFD. For example, the linker creates an extra section | |
60 | <<COMMON>> for each input file's BFD to hold information about | |
61 | common storage. | |
62 | ||
63 | The raw data is not necessarily read in when | |
64 | the section descriptor is created. Some targets may leave the | |
65 | data in place until a <<bfd_get_section_contents>> call is | |
66 | made. Other back ends may read in all the data at once. For | |
67 | example, an S-record file has to be read once to determine the | |
fdef3943 | 68 | size of the data. |
252b5132 RH |
69 | |
70 | INODE | |
71 | Section Output, typedef asection, Section Input, Sections | |
72 | ||
73 | SUBSECTION | |
74 | Section output | |
75 | ||
76 | To write a new object style BFD, the various sections to be | |
77 | written have to be created. They are attached to the BFD in | |
78 | the same way as input sections; data is written to the | |
79 | sections using <<bfd_set_section_contents>>. | |
80 | ||
81 | Any program that creates or combines sections (e.g., the assembler | |
82 | and linker) must use the <<asection>> fields <<output_section>> and | |
83 | <<output_offset>> to indicate the file sections to which each | |
84 | section must be written. (If the section is being created from | |
85 | scratch, <<output_section>> should probably point to the section | |
86 | itself and <<output_offset>> should probably be zero.) | |
87 | ||
88 | The data to be written comes from input sections attached | |
89 | (via <<output_section>> pointers) to | |
90 | the output sections. The output section structure can be | |
91 | considered a filter for the input section: the output section | |
92 | determines the vma of the output data and the name, but the | |
93 | input section determines the offset into the output section of | |
94 | the data to be written. | |
95 | ||
96 | E.g., to create a section "O", starting at 0x100, 0x123 long, | |
97 | containing two subsections, "A" at offset 0x0 (i.e., at vma | |
98 | 0x100) and "B" at offset 0x20 (i.e., at vma 0x120) the <<asection>> | |
99 | structures would look like: | |
100 | ||
101 | | section name "A" | |
102 | | output_offset 0x00 | |
103 | | size 0x20 | |
104 | | output_section -----------> section name "O" | |
105 | | | vma 0x100 | |
106 | | section name "B" | size 0x123 | |
107 | | output_offset 0x20 | | |
108 | | size 0x103 | | |
109 | | output_section --------| | |
110 | ||
252b5132 RH |
111 | SUBSECTION |
112 | Link orders | |
113 | ||
114 | The data within a section is stored in a @dfn{link_order}. | |
115 | These are much like the fixups in <<gas>>. The link_order | |
116 | abstraction allows a section to grow and shrink within itself. | |
117 | ||
118 | A link_order knows how big it is, and which is the next | |
119 | link_order and where the raw data for it is; it also points to | |
120 | a list of relocations which apply to it. | |
121 | ||
122 | The link_order is used by the linker to perform relaxing on | |
123 | final code. The compiler creates code which is as big as | |
124 | necessary to make it work without relaxing, and the user can | |
125 | select whether to relax. Sometimes relaxing takes a lot of | |
126 | time. The linker runs around the relocations to see if any | |
127 | are attached to data which can be shrunk, if so it does it on | |
128 | a link_order by link_order basis. | |
129 | ||
130 | */ | |
131 | ||
252b5132 | 132 | #include "sysdep.h" |
3db64b00 | 133 | #include "bfd.h" |
252b5132 RH |
134 | #include "libbfd.h" |
135 | #include "bfdlink.h" | |
136 | ||
137 | /* | |
138 | DOCDD | |
139 | INODE | |
140 | typedef asection, section prototypes, Section Output, Sections | |
141 | SUBSECTION | |
142 | typedef asection | |
143 | ||
144 | Here is the section structure: | |
145 | ||
146 | CODE_FRAGMENT | |
147 | . | |
198beae2 | 148 | .typedef struct bfd_section |
252b5132 | 149 | .{ |
52b219b5 AM |
150 | . {* The name of the section; the name isn't a copy, the pointer is |
151 | . the same as that passed to bfd_make_section. *} | |
52b219b5 AM |
152 | . const char *name; |
153 | . | |
154 | . {* A unique sequence number. *} | |
7292b3ac | 155 | . unsigned int id; |
252b5132 | 156 | . |
a8c4d40b L |
157 | . {* A unique section number which can be used by assembler to |
158 | . distinguish different sections with the same section name. *} | |
159 | . unsigned int section_id; | |
160 | . | |
dbb410c3 | 161 | . {* Which section in the bfd; 0..n-1 as sections are created in a bfd. *} |
7292b3ac | 162 | . unsigned int index; |
252b5132 | 163 | . |
52b219b5 | 164 | . {* The next section in the list belonging to the BFD, or NULL. *} |
198beae2 | 165 | . struct bfd_section *next; |
252b5132 | 166 | . |
5daa8fe7 L |
167 | . {* The previous section in the list belonging to the BFD, or NULL. *} |
168 | . struct bfd_section *prev; | |
169 | . | |
52b219b5 AM |
170 | . {* The field flags contains attributes of the section. Some |
171 | . flags are read in from the object file, and some are | |
172 | . synthesized from other information. *} | |
52b219b5 | 173 | . flagword flags; |
252b5132 | 174 | . |
07d6d2b8 | 175 | .#define SEC_NO_FLAGS 0x0 |
252b5132 | 176 | . |
52b219b5 AM |
177 | . {* Tells the OS to allocate space for this section when loading. |
178 | . This is clear for a section containing debug information only. *} | |
07d6d2b8 | 179 | .#define SEC_ALLOC 0x1 |
252b5132 | 180 | . |
52b219b5 AM |
181 | . {* Tells the OS to load the section from the file when loading. |
182 | . This is clear for a .bss section. *} | |
07d6d2b8 | 183 | .#define SEC_LOAD 0x2 |
252b5132 | 184 | . |
52b219b5 AM |
185 | . {* The section contains data still to be relocated, so there is |
186 | . some relocation information too. *} | |
07d6d2b8 | 187 | .#define SEC_RELOC 0x4 |
252b5132 | 188 | . |
52b219b5 | 189 | . {* A signal to the OS that the section contains read only data. *} |
07d6d2b8 | 190 | .#define SEC_READONLY 0x8 |
252b5132 | 191 | . |
52b219b5 | 192 | . {* The section contains code only. *} |
07d6d2b8 | 193 | .#define SEC_CODE 0x10 |
252b5132 | 194 | . |
52b219b5 | 195 | . {* The section contains data only. *} |
07d6d2b8 | 196 | .#define SEC_DATA 0x20 |
252b5132 | 197 | . |
52b219b5 | 198 | . {* The section will reside in ROM. *} |
07d6d2b8 | 199 | .#define SEC_ROM 0x40 |
252b5132 | 200 | . |
52b219b5 AM |
201 | . {* The section contains constructor information. This section |
202 | . type is used by the linker to create lists of constructors and | |
203 | . destructors used by <<g++>>. When a back end sees a symbol | |
204 | . which should be used in a constructor list, it creates a new | |
205 | . section for the type of name (e.g., <<__CTOR_LIST__>>), attaches | |
206 | . the symbol to it, and builds a relocation. To build the lists | |
207 | . of constructors, all the linker has to do is catenate all the | |
208 | . sections called <<__CTOR_LIST__>> and relocate the data | |
209 | . contained within - exactly the operations it would peform on | |
210 | . standard data. *} | |
07d6d2b8 | 211 | .#define SEC_CONSTRUCTOR 0x80 |
252b5132 | 212 | . |
52b219b5 AM |
213 | . {* The section has contents - a data section could be |
214 | . <<SEC_ALLOC>> | <<SEC_HAS_CONTENTS>>; a debug section could be | |
215 | . <<SEC_HAS_CONTENTS>> *} | |
07d6d2b8 | 216 | .#define SEC_HAS_CONTENTS 0x100 |
252b5132 | 217 | . |
52b219b5 AM |
218 | . {* An instruction to the linker to not output the section |
219 | . even if it has information which would normally be written. *} | |
07d6d2b8 | 220 | .#define SEC_NEVER_LOAD 0x200 |
252b5132 | 221 | . |
13ae64f3 | 222 | . {* The section contains thread local data. *} |
07d6d2b8 | 223 | .#define SEC_THREAD_LOCAL 0x400 |
13ae64f3 | 224 | . |
8772de11 MR |
225 | . {* The section's size is fixed. Generic linker code will not |
226 | . recalculate it and it is up to whoever has set this flag to | |
227 | . get the size right. *} | |
228 | .#define SEC_FIXED_SIZE 0x800 | |
229 | . | |
52b219b5 AM |
230 | . {* The section contains common symbols (symbols may be defined |
231 | . multiple times, the value of a symbol is the amount of | |
232 | . space it requires, and the largest symbol value is the one | |
233 | . used). Most targets have exactly one of these (which we | |
234 | . translate to bfd_com_section_ptr), but ECOFF has two. *} | |
07d6d2b8 | 235 | .#define SEC_IS_COMMON 0x1000 |
252b5132 | 236 | . |
52b219b5 AM |
237 | . {* The section contains only debugging information. For |
238 | . example, this is set for ELF .debug and .stab sections. | |
239 | . strip tests this flag to see if a section can be | |
240 | . discarded. *} | |
07d6d2b8 | 241 | .#define SEC_DEBUGGING 0x2000 |
252b5132 | 242 | . |
52b219b5 AM |
243 | . {* The contents of this section are held in memory pointed to |
244 | . by the contents field. This is checked by bfd_get_section_contents, | |
245 | . and the data is retrieved from memory if appropriate. *} | |
07d6d2b8 | 246 | .#define SEC_IN_MEMORY 0x4000 |
252b5132 | 247 | . |
52b219b5 AM |
248 | . {* The contents of this section are to be excluded by the |
249 | . linker for executable and shared objects unless those | |
250 | . objects are to be further relocated. *} | |
07d6d2b8 | 251 | .#define SEC_EXCLUDE 0x8000 |
252b5132 | 252 | . |
dbb410c3 AM |
253 | . {* The contents of this section are to be sorted based on the sum of |
254 | . the symbol and addend values specified by the associated relocation | |
255 | . entries. Entries without associated relocation entries will be | |
256 | . appended to the end of the section in an unspecified order. *} | |
07d6d2b8 | 257 | .#define SEC_SORT_ENTRIES 0x10000 |
252b5132 | 258 | . |
52b219b5 AM |
259 | . {* When linking, duplicate sections of the same name should be |
260 | . discarded, rather than being combined into a single section as | |
261 | . is usually done. This is similar to how common symbols are | |
262 | . handled. See SEC_LINK_DUPLICATES below. *} | |
07d6d2b8 | 263 | .#define SEC_LINK_ONCE 0x20000 |
252b5132 | 264 | . |
52b219b5 AM |
265 | . {* If SEC_LINK_ONCE is set, this bitfield describes how the linker |
266 | . should handle duplicate sections. *} | |
07d6d2b8 | 267 | .#define SEC_LINK_DUPLICATES 0xc0000 |
252b5132 | 268 | . |
52b219b5 AM |
269 | . {* This value for SEC_LINK_DUPLICATES means that duplicate |
270 | . sections with the same name should simply be discarded. *} | |
07d6d2b8 | 271 | .#define SEC_LINK_DUPLICATES_DISCARD 0x0 |
252b5132 | 272 | . |
52b219b5 AM |
273 | . {* This value for SEC_LINK_DUPLICATES means that the linker |
274 | . should warn if there are any duplicate sections, although | |
275 | . it should still only link one copy. *} | |
07d6d2b8 | 276 | .#define SEC_LINK_DUPLICATES_ONE_ONLY 0x40000 |
252b5132 | 277 | . |
52b219b5 AM |
278 | . {* This value for SEC_LINK_DUPLICATES means that the linker |
279 | . should warn if any duplicate sections are a different size. *} | |
f856272b | 280 | .#define SEC_LINK_DUPLICATES_SAME_SIZE 0x80000 |
252b5132 | 281 | . |
52b219b5 AM |
282 | . {* This value for SEC_LINK_DUPLICATES means that the linker |
283 | . should warn if any duplicate sections contain different | |
284 | . contents. *} | |
ebe372c1 L |
285 | .#define SEC_LINK_DUPLICATES_SAME_CONTENTS \ |
286 | . (SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE) | |
252b5132 | 287 | . |
52b219b5 AM |
288 | . {* This section was created by the linker as part of dynamic |
289 | . relocation or other arcane processing. It is skipped when | |
290 | . going through the first-pass output, trusting that someone | |
291 | . else up the line will take care of it later. *} | |
07d6d2b8 | 292 | .#define SEC_LINKER_CREATED 0x100000 |
252b5132 | 293 | . |
a8c4d40b | 294 | . {* This section contains a section ID to distinguish different |
ef4627fa | 295 | . sections with the same section name. *} |
a8c4d40b L |
296 | .#define SEC_ASSEMBLER_SECTION_ID 0x100000 |
297 | . | |
a14a5de3 AM |
298 | . {* This section should not be subject to garbage collection. |
299 | . Also set to inform the linker that this section should not be | |
300 | . listed in the link map as discarded. *} | |
07d6d2b8 | 301 | .#define SEC_KEEP 0x200000 |
252b5132 | 302 | . |
52b219b5 AM |
303 | . {* This section contains "short" data, and should be placed |
304 | . "near" the GP. *} | |
07d6d2b8 | 305 | .#define SEC_SMALL_DATA 0x400000 |
34cbe64e | 306 | . |
2dd439c5 L |
307 | . {* Attempt to merge identical entities in the section. |
308 | . Entity size is given in the entsize field. *} | |
07d6d2b8 | 309 | .#define SEC_MERGE 0x800000 |
2dd439c5 L |
310 | . |
311 | . {* If given with SEC_MERGE, entities to merge are zero terminated | |
312 | . strings where entsize specifies character size instead of fixed | |
313 | . size entries. *} | |
07d6d2b8 | 314 | .#define SEC_STRINGS 0x1000000 |
2dd439c5 | 315 | . |
dbb410c3 | 316 | . {* This section contains data about section groups. *} |
07d6d2b8 | 317 | .#define SEC_GROUP 0x2000000 |
ebe372c1 L |
318 | . |
319 | . {* The section is a COFF shared library section. This flag is | |
320 | . only for the linker. If this type of section appears in | |
321 | . the input file, the linker must copy it to the output file | |
322 | . without changing the vma or size. FIXME: Although this | |
323 | . was originally intended to be general, it really is COFF | |
324 | . specific (and the flag was renamed to indicate this). It | |
325 | . might be cleaner to have some more general mechanism to | |
326 | . allow the back end to control what the linker does with | |
327 | . sections. *} | |
07d6d2b8 | 328 | .#define SEC_COFF_SHARED_LIBRARY 0x4000000 |
ebe372c1 | 329 | . |
310fd250 L |
330 | . {* This input section should be copied to output in reverse order |
331 | . as an array of pointers. This is for ELF linker internal use | |
332 | . only. *} | |
07d6d2b8 | 333 | .#define SEC_ELF_REVERSE_COPY 0x4000000 |
310fd250 | 334 | . |
ebe372c1 L |
335 | . {* This section contains data which may be shared with other |
336 | . executables or shared objects. This is for COFF only. *} | |
07d6d2b8 | 337 | .#define SEC_COFF_SHARED 0x8000000 |
ebe372c1 | 338 | . |
0ce398f1 L |
339 | . {* This section should be compressed. This is for ELF linker |
340 | . internal use only. *} | |
07d6d2b8 | 341 | .#define SEC_ELF_COMPRESS 0x8000000 |
0ce398f1 | 342 | . |
ebe372c1 L |
343 | . {* When a section with this flag is being linked, then if the size of |
344 | . the input section is less than a page, it should not cross a page | |
345 | . boundary. If the size of the input section is one page or more, | |
346 | . it should be aligned on a page boundary. This is for TI | |
347 | . TMS320C54X only. *} | |
07d6d2b8 | 348 | .#define SEC_TIC54X_BLOCK 0x10000000 |
ebe372c1 | 349 | . |
f6fe1ccd L |
350 | . {* This section should be renamed. This is for ELF linker |
351 | . internal use only. *} | |
07d6d2b8 | 352 | .#define SEC_ELF_RENAME 0x10000000 |
f6fe1ccd | 353 | . |
ebe372c1 L |
354 | . {* Conditionally link this section; do not link if there are no |
355 | . references found to any symbol in the section. This is for TI | |
356 | . TMS320C54X only. *} | |
07d6d2b8 | 357 | .#define SEC_TIC54X_CLINK 0x20000000 |
dbb410c3 | 358 | . |
9361e630 | 359 | . {* This section contains vliw code. This is for Toshiba MeP only. *} |
07d6d2b8 | 360 | .#define SEC_MEP_VLIW 0x20000000 |
9361e630 | 361 | . |
61826503 CE |
362 | . {* All symbols, sizes and relocations in this section are octets |
363 | . instead of bytes. Required for DWARF debug sections as DWARF | |
364 | . information is organized in octets, not bytes. *} | |
365 | .#define SEC_ELF_OCTETS 0x40000000 | |
366 | . | |
156621f3 KT |
367 | . {* Indicate that section has the no read flag set. This happens |
368 | . when memory read flag isn't set. *} | |
07d6d2b8 | 369 | .#define SEC_COFF_NOREAD 0x40000000 |
156621f3 | 370 | . |
f0728ee3 | 371 | . {* Indicate that section has the purecode flag set. *} |
07d6d2b8 | 372 | .#define SEC_ELF_PURECODE 0x80000000 |
ac4c9b04 | 373 | . |
52b219b5 | 374 | . {* End of section flags. *} |
252b5132 | 375 | . |
52b219b5 | 376 | . {* Some internal packed boolean fields. *} |
252b5132 | 377 | . |
52b219b5 AM |
378 | . {* See the vma field. *} |
379 | . unsigned int user_set_vma : 1; | |
252b5132 | 380 | . |
52b219b5 AM |
381 | . {* A mark flag used by some of the linker backends. *} |
382 | . unsigned int linker_mark : 1; | |
252b5132 | 383 | . |
d1778b88 | 384 | . {* Another mark flag used by some of the linker backends. Set for |
08da05b0 | 385 | . output sections that have an input section. *} |
d1778b88 AM |
386 | . unsigned int linker_has_input : 1; |
387 | . | |
9d0a14d3 | 388 | . {* Mark flag used by some linker backends for garbage collection. *} |
52b219b5 | 389 | . unsigned int gc_mark : 1; |
252b5132 | 390 | . |
4a114e3e L |
391 | . {* Section compression status. *} |
392 | . unsigned int compress_status : 2; | |
393 | .#define COMPRESS_SECTION_NONE 0 | |
394 | .#define COMPRESS_SECTION_DONE 1 | |
395 | .#define DECOMPRESS_SECTION_SIZED 2 | |
396 | . | |
68bfbfcc AM |
397 | . {* The following flags are used by the ELF linker. *} |
398 | . | |
399 | . {* Mark sections which have been allocated to segments. *} | |
bc67d8a6 NC |
400 | . unsigned int segment_mark : 1; |
401 | . | |
68bfbfcc AM |
402 | . {* Type of sec_info information. *} |
403 | . unsigned int sec_info_type:3; | |
dbaa2011 AM |
404 | .#define SEC_INFO_TYPE_NONE 0 |
405 | .#define SEC_INFO_TYPE_STABS 1 | |
406 | .#define SEC_INFO_TYPE_MERGE 2 | |
407 | .#define SEC_INFO_TYPE_EH_FRAME 3 | |
408 | .#define SEC_INFO_TYPE_JUST_SYMS 4 | |
5446cbdf | 409 | .#define SEC_INFO_TYPE_TARGET 5 |
2f0c68f2 | 410 | .#define SEC_INFO_TYPE_EH_FRAME_ENTRY 6 |
68bfbfcc AM |
411 | . |
412 | . {* Nonzero if this section uses RELA relocations, rather than REL. *} | |
413 | . unsigned int use_rela_p:1; | |
414 | . | |
4c52953f AM |
415 | . {* Bits used by various backends. The generic code doesn't touch |
416 | . these fields. *} | |
68bfbfcc | 417 | . |
b0dddeec AM |
418 | . unsigned int sec_flg0:1; |
419 | . unsigned int sec_flg1:1; | |
420 | . unsigned int sec_flg2:1; | |
421 | . unsigned int sec_flg3:1; | |
422 | . unsigned int sec_flg4:1; | |
423 | . unsigned int sec_flg5:1; | |
68bfbfcc | 424 | . |
52b219b5 | 425 | . {* End of internal packed boolean fields. *} |
252b5132 | 426 | . |
52b219b5 AM |
427 | . {* The virtual memory address of the section - where it will be |
428 | . at run time. The symbols are relocated against this. The | |
429 | . user_set_vma flag is maintained by bfd; if it's not set, the | |
430 | . backend can assign addresses (for example, in <<a.out>>, where | |
431 | . the default address for <<.data>> is dependent on the specific | |
432 | . target and various flags). *} | |
52b219b5 | 433 | . bfd_vma vma; |
252b5132 | 434 | . |
52b219b5 AM |
435 | . {* The load address of the section - where it would be in a |
436 | . rom image; really only used for writing section header | |
b5f79c76 | 437 | . information. *} |
52b219b5 | 438 | . bfd_vma lma; |
252b5132 | 439 | . |
37b01f6a | 440 | . {* The size of the section in *octets*, as it will be output. |
52b219b5 | 441 | . Contains a value even if the section has no contents (e.g., the |
eea6121a AM |
442 | . size of <<.bss>>). *} |
443 | . bfd_size_type size; | |
444 | . | |
1a23a9e6 | 445 | . {* For input sections, the original size on disk of the section, in |
73c5c7a8 BW |
446 | . octets. This field should be set for any section whose size is |
447 | . changed by linker relaxation. It is required for sections where | |
448 | . the linker relaxation scheme doesn't cache altered section and | |
449 | . reloc contents (stabs, eh_frame, SEC_MERGE, some coff relaxing | |
450 | . targets), and thus the original size needs to be kept to read the | |
451 | . section multiple times. For output sections, rawsize holds the | |
452 | . section size calculated on a previous linker relaxation pass. *} | |
eea6121a | 453 | . bfd_size_type rawsize; |
252b5132 | 454 | . |
4a114e3e L |
455 | . {* The compressed size of the section in octets. *} |
456 | . bfd_size_type compressed_size; | |
457 | . | |
7ba29e2a NC |
458 | . {* Relaxation table. *} |
459 | . struct relax_table *relax; | |
460 | . | |
461 | . {* Count of used relaxation table entries. *} | |
462 | . int relax_count; | |
463 | . | |
464 | . | |
52b219b5 AM |
465 | . {* If this section is going to be output, then this value is the |
466 | . offset in *bytes* into the output section of the first byte in the | |
467 | . input section (byte ==> smallest addressable unit on the | |
468 | . target). In most cases, if this was going to start at the | |
469 | . 100th octet (8-bit quantity) in the output section, this value | |
470 | . would be 100. However, if the target byte size is 16 bits | |
471 | . (bfd_octets_per_byte is "2"), this value would be 50. *} | |
52b219b5 | 472 | . bfd_vma output_offset; |
252b5132 | 473 | . |
52b219b5 | 474 | . {* The output section through which to map on output. *} |
198beae2 | 475 | . struct bfd_section *output_section; |
252b5132 | 476 | . |
52b219b5 AM |
477 | . {* The alignment requirement of the section, as an exponent of 2 - |
478 | . e.g., 3 aligns to 2^3 (or 8). *} | |
52b219b5 | 479 | . unsigned int alignment_power; |
252b5132 | 480 | . |
52b219b5 AM |
481 | . {* If an input section, a pointer to a vector of relocation |
482 | . records for the data in this section. *} | |
52b219b5 | 483 | . struct reloc_cache_entry *relocation; |
252b5132 | 484 | . |
52b219b5 AM |
485 | . {* If an output section, a pointer to a vector of pointers to |
486 | . relocation records for the data in this section. *} | |
52b219b5 | 487 | . struct reloc_cache_entry **orelocation; |
252b5132 | 488 | . |
b5f79c76 | 489 | . {* The number of relocation records in one of the above. *} |
52b219b5 | 490 | . unsigned reloc_count; |
252b5132 | 491 | . |
52b219b5 AM |
492 | . {* Information below is back end specific - and not always used |
493 | . or updated. *} | |
252b5132 | 494 | . |
52b219b5 | 495 | . {* File position of section data. *} |
52b219b5 | 496 | . file_ptr filepos; |
252b5132 | 497 | . |
52b219b5 | 498 | . {* File position of relocation info. *} |
52b219b5 | 499 | . file_ptr rel_filepos; |
252b5132 | 500 | . |
52b219b5 | 501 | . {* File position of line data. *} |
52b219b5 | 502 | . file_ptr line_filepos; |
252b5132 | 503 | . |
52b219b5 | 504 | . {* Pointer to data for applications. *} |
c58b9523 | 505 | . void *userdata; |
252b5132 | 506 | . |
52b219b5 AM |
507 | . {* If the SEC_IN_MEMORY flag is set, this points to the actual |
508 | . contents. *} | |
509 | . unsigned char *contents; | |
252b5132 | 510 | . |
52b219b5 | 511 | . {* Attached line number information. *} |
52b219b5 | 512 | . alent *lineno; |
252b5132 | 513 | . |
52b219b5 | 514 | . {* Number of line number records. *} |
52b219b5 | 515 | . unsigned int lineno_count; |
252b5132 | 516 | . |
2dd439c5 | 517 | . {* Entity size for merging purposes. *} |
2dd439c5 L |
518 | . unsigned int entsize; |
519 | . | |
f97b9cb8 L |
520 | . {* Points to the kept section if this section is a link-once section, |
521 | . and is discarded. *} | |
198beae2 | 522 | . struct bfd_section *kept_section; |
f97b9cb8 | 523 | . |
52b219b5 AM |
524 | . {* When a section is being output, this value changes as more |
525 | . linenumbers are written out. *} | |
52b219b5 | 526 | . file_ptr moving_line_filepos; |
252b5132 | 527 | . |
52b219b5 | 528 | . {* What the section number is in the target world. *} |
52b219b5 | 529 | . int target_index; |
252b5132 | 530 | . |
c58b9523 | 531 | . void *used_by_bfd; |
252b5132 | 532 | . |
52b219b5 AM |
533 | . {* If this is a constructor section then here is a list of the |
534 | . relocations created to relocate items within it. *} | |
52b219b5 | 535 | . struct relent_chain *constructor_chain; |
252b5132 | 536 | . |
52b219b5 | 537 | . {* The BFD which owns the section. *} |
52b219b5 | 538 | . bfd *owner; |
252b5132 | 539 | . |
b5f79c76 | 540 | . {* A symbol which points at this section only. *} |
fc0a2244 AC |
541 | . struct bfd_symbol *symbol; |
542 | . struct bfd_symbol **symbol_ptr_ptr; | |
252b5132 | 543 | . |
8423293d AM |
544 | . {* Early in the link process, map_head and map_tail are used to build |
545 | . a list of input sections attached to an output section. Later, | |
546 | . output sections use these fields for a list of bfd_link_order | |
b7d07216 L |
547 | . structs. The linked_to_symbol_name field is for ELF assembler |
548 | . internal use. *} | |
8423293d AM |
549 | . union { |
550 | . struct bfd_link_order *link_order; | |
551 | . struct bfd_section *s; | |
b7d07216 | 552 | . const char *linked_to_symbol_name; |
8423293d | 553 | . } map_head, map_tail; |
abf874aa CL |
554 | . {* Points to the output section this section is already assigned to, if any. |
555 | . This is used when support for non-contiguous memory regions is enabled. *} | |
556 | . struct bfd_section *already_assigned; | |
557 | . | |
b5f79c76 | 558 | .} asection; |
252b5132 | 559 | . |
7ba29e2a | 560 | .{* Relax table contains information about instructions which can |
68ffbac6 | 561 | . be removed by relaxation -- replacing a long address with a |
7ba29e2a NC |
562 | . short address. *} |
563 | .struct relax_table { | |
564 | . {* Address where bytes may be deleted. *} | |
565 | . bfd_vma addr; | |
68ffbac6 | 566 | . |
7ba29e2a NC |
567 | . {* Number of bytes to be deleted. *} |
568 | . int size; | |
569 | .}; | |
570 | . | |
a48931cc AM |
571 | .static inline const char * |
572 | .bfd_section_name (const asection *sec) | |
573 | .{ | |
574 | . return sec->name; | |
575 | .} | |
576 | . | |
577 | .static inline bfd_size_type | |
578 | .bfd_section_size (const asection *sec) | |
579 | .{ | |
580 | . return sec->size; | |
581 | .} | |
582 | . | |
583 | .static inline bfd_vma | |
584 | .bfd_section_vma (const asection *sec) | |
585 | .{ | |
586 | . return sec->vma; | |
587 | .} | |
588 | . | |
589 | .static inline bfd_vma | |
590 | .bfd_section_lma (const asection *sec) | |
591 | .{ | |
592 | . return sec->lma; | |
593 | .} | |
594 | . | |
595 | .static inline unsigned int | |
596 | .bfd_section_alignment (const asection *sec) | |
597 | .{ | |
598 | . return sec->alignment_power; | |
599 | .} | |
600 | . | |
601 | .static inline flagword | |
602 | .bfd_section_flags (const asection *sec) | |
603 | .{ | |
604 | . return sec->flags; | |
605 | .} | |
606 | . | |
607 | .static inline void * | |
608 | .bfd_section_userdata (const asection *sec) | |
609 | .{ | |
610 | . return sec->userdata; | |
611 | .} | |
0a1b45a2 | 612 | .static inline bool |
a48931cc AM |
613 | .bfd_is_com_section (const asection *sec) |
614 | .{ | |
615 | . return (sec->flags & SEC_IS_COMMON) != 0; | |
616 | .} | |
617 | . | |
27b829ee NC |
618 | .{* Note: the following are provided as inline functions rather than macros |
619 | . because not all callers use the return value. A macro implementation | |
620 | . would use a comma expression, eg: "((ptr)->foo = val, TRUE)" and some | |
621 | . compilers will complain about comma expressions that have no effect. *} | |
0a1b45a2 | 622 | .static inline bool |
fd361982 | 623 | .bfd_set_section_userdata (asection *sec, void *val) |
27b829ee | 624 | .{ |
fd361982 | 625 | . sec->userdata = val; |
0a1b45a2 | 626 | . return true; |
27b829ee NC |
627 | .} |
628 | . | |
0a1b45a2 | 629 | .static inline bool |
fd361982 | 630 | .bfd_set_section_vma (asection *sec, bfd_vma val) |
27b829ee | 631 | .{ |
fd361982 | 632 | . sec->vma = sec->lma = val; |
0a1b45a2 AM |
633 | . sec->user_set_vma = true; |
634 | . return true; | |
27b829ee NC |
635 | .} |
636 | . | |
0a1b45a2 | 637 | .static inline bool |
fd361982 | 638 | .bfd_set_section_lma (asection *sec, bfd_vma val) |
27b829ee | 639 | .{ |
fd361982 | 640 | . sec->lma = val; |
0a1b45a2 | 641 | . return true; |
fd361982 AM |
642 | .} |
643 | . | |
0a1b45a2 | 644 | .static inline bool |
fd361982 AM |
645 | .bfd_set_section_alignment (asection *sec, unsigned int val) |
646 | .{ | |
647 | . sec->alignment_power = val; | |
0a1b45a2 | 648 | . return true; |
27b829ee NC |
649 | .} |
650 | . | |
52b219b5 AM |
651 | .{* These sections are global, and are managed by BFD. The application |
652 | . and target back end are not permitted to change the values in | |
45dfa85a | 653 | . these sections. *} |
45a466b5 | 654 | .extern asection _bfd_std_section[4]; |
45dfa85a | 655 | . |
252b5132 RH |
656 | .#define BFD_ABS_SECTION_NAME "*ABS*" |
657 | .#define BFD_UND_SECTION_NAME "*UND*" | |
658 | .#define BFD_COM_SECTION_NAME "*COM*" | |
659 | .#define BFD_IND_SECTION_NAME "*IND*" | |
660 | . | |
b5f79c76 | 661 | .{* Pointer to the common section. *} |
45a466b5 | 662 | .#define bfd_com_section_ptr (&_bfd_std_section[0]) |
45dfa85a | 663 | .{* Pointer to the undefined section. *} |
45a466b5 | 664 | .#define bfd_und_section_ptr (&_bfd_std_section[1]) |
45dfa85a | 665 | .{* Pointer to the absolute section. *} |
45a466b5 | 666 | .#define bfd_abs_section_ptr (&_bfd_std_section[2]) |
b5f79c76 | 667 | .{* Pointer to the indirect section. *} |
45a466b5 | 668 | .#define bfd_ind_section_ptr (&_bfd_std_section[3]) |
45dfa85a | 669 | . |
0a1b45a2 | 670 | .static inline bool |
a48931cc AM |
671 | .bfd_is_und_section (const asection *sec) |
672 | .{ | |
673 | . return sec == bfd_und_section_ptr; | |
674 | .} | |
675 | . | |
0a1b45a2 | 676 | .static inline bool |
a48931cc AM |
677 | .bfd_is_abs_section (const asection *sec) |
678 | .{ | |
679 | . return sec == bfd_abs_section_ptr; | |
680 | .} | |
681 | . | |
0a1b45a2 | 682 | .static inline bool |
a48931cc AM |
683 | .bfd_is_ind_section (const asection *sec) |
684 | .{ | |
685 | . return sec == bfd_ind_section_ptr; | |
686 | .} | |
687 | . | |
0a1b45a2 | 688 | .static inline bool |
a48931cc AM |
689 | .bfd_is_const_section (const asection *sec) |
690 | .{ | |
18f97353 AM |
691 | . return (sec >= _bfd_std_section |
692 | . && sec < _bfd_std_section + (sizeof (_bfd_std_section) | |
693 | . / sizeof (_bfd_std_section[0]))); | |
a48931cc AM |
694 | .} |
695 | . | |
696 | .{* Return TRUE if input section SEC has been discarded. *} | |
0a1b45a2 | 697 | .static inline bool |
a48931cc AM |
698 | .discarded_section (const asection *sec) |
699 | .{ | |
700 | . return (!bfd_is_abs_section (sec) | |
701 | . && bfd_is_abs_section (sec->output_section) | |
702 | . && sec->sec_info_type != SEC_INFO_TYPE_MERGE | |
703 | . && sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS); | |
704 | .} | |
9e7b37b3 | 705 | . |
821e6ff6 | 706 | .#define BFD_FAKE_SECTION(SEC, SYM, NAME, IDX, FLAGS) \ |
a8c4d40b L |
707 | . {* name, id, section_id, index, next, prev, flags, user_set_vma, *} \ |
708 | . { NAME, IDX, 0, 0, NULL, NULL, FLAGS, 0, \ | |
a4d8e49b | 709 | . \ |
48e81d7f | 710 | . {* linker_mark, linker_has_input, gc_mark, decompress_status, *} \ |
b0dddeec | 711 | . 0, 0, 1, 0, \ |
a4d8e49b | 712 | . \ |
48e81d7f | 713 | . {* segment_mark, sec_info_type, use_rela_p, *} \ |
4a114e3e | 714 | . 0, 0, 0, \ |
a4d8e49b | 715 | . \ |
48e81d7f | 716 | . {* sec_flg0, sec_flg1, sec_flg2, sec_flg3, sec_flg4, sec_flg5, *} \ |
b0dddeec | 717 | . 0, 0, 0, 0, 0, 0, \ |
a4d8e49b | 718 | . \ |
48e81d7f | 719 | . {* vma, lma, size, rawsize, compressed_size, relax, relax_count, *} \ |
4a114e3e | 720 | . 0, 0, 0, 0, 0, 0, 0, \ |
a4d8e49b | 721 | . \ |
48e81d7f | 722 | . {* output_offset, output_section, alignment_power, *} \ |
45dfa85a | 723 | . 0, &SEC, 0, \ |
a4d8e49b | 724 | . \ |
48e81d7f | 725 | . {* relocation, orelocation, reloc_count, filepos, rel_filepos, *} \ |
a4d8e49b L |
726 | . NULL, NULL, 0, 0, 0, \ |
727 | . \ | |
48e81d7f | 728 | . {* line_filepos, userdata, contents, lineno, lineno_count, *} \ |
a4d8e49b L |
729 | . 0, NULL, NULL, NULL, 0, \ |
730 | . \ | |
48e81d7f AM |
731 | . {* entsize, kept_section, moving_line_filepos, *} \ |
732 | . 0, NULL, 0, \ | |
a4d8e49b | 733 | . \ |
48e81d7f | 734 | . {* target_index, used_by_bfd, constructor_chain, owner, *} \ |
a4d8e49b L |
735 | . 0, NULL, NULL, NULL, \ |
736 | . \ | |
b209b5a6 AM |
737 | . {* symbol, symbol_ptr_ptr, *} \ |
738 | . (struct bfd_symbol *) SYM, &SEC.symbol, \ | |
a4d8e49b | 739 | . \ |
48e81d7f AM |
740 | . {* map_head, map_tail, already_assigned *} \ |
741 | . { NULL }, { NULL }, NULL \ | |
abf874aa | 742 | . \ |
a4d8e49b L |
743 | . } |
744 | . | |
7eacd66b AM |
745 | .{* We use a macro to initialize the static asymbol structures because |
746 | . traditional C does not permit us to initialize a union member while | |
747 | . gcc warns if we don't initialize it. | |
748 | . the_bfd, name, value, attr, section [, udata] *} | |
749 | .#ifdef __STDC__ | |
750 | .#define GLOBAL_SYM_INIT(NAME, SECTION) \ | |
751 | . { 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 }} | |
752 | .#else | |
753 | .#define GLOBAL_SYM_INIT(NAME, SECTION) \ | |
754 | . { 0, NAME, 0, BSF_SECTION_SYM, SECTION } | |
755 | .#endif | |
756 | . | |
252b5132 RH |
757 | */ |
758 | ||
759 | /* These symbols are global, not specific to any BFD. Therefore, anything | |
760 | that tries to change them is broken, and should be repaired. */ | |
22bc497d | 761 | |
252b5132 RH |
762 | static const asymbol global_syms[] = |
763 | { | |
45dfa85a AM |
764 | GLOBAL_SYM_INIT (BFD_COM_SECTION_NAME, bfd_com_section_ptr), |
765 | GLOBAL_SYM_INIT (BFD_UND_SECTION_NAME, bfd_und_section_ptr), | |
766 | GLOBAL_SYM_INIT (BFD_ABS_SECTION_NAME, bfd_abs_section_ptr), | |
767 | GLOBAL_SYM_INIT (BFD_IND_SECTION_NAME, bfd_ind_section_ptr) | |
252b5132 RH |
768 | }; |
769 | ||
45dfa85a | 770 | #define STD_SECTION(NAME, IDX, FLAGS) \ |
821e6ff6 | 771 | BFD_FAKE_SECTION(_bfd_std_section[IDX], &global_syms[IDX], NAME, IDX, FLAGS) |
252b5132 | 772 | |
45a466b5 | 773 | asection _bfd_std_section[] = { |
45dfa85a AM |
774 | STD_SECTION (BFD_COM_SECTION_NAME, 0, SEC_IS_COMMON), |
775 | STD_SECTION (BFD_UND_SECTION_NAME, 1, 0), | |
776 | STD_SECTION (BFD_ABS_SECTION_NAME, 2, 0), | |
777 | STD_SECTION (BFD_IND_SECTION_NAME, 3, 0) | |
778 | }; | |
252b5132 RH |
779 | #undef STD_SECTION |
780 | ||
73e87d70 AM |
781 | /* Initialize an entry in the section hash table. */ |
782 | ||
783 | struct bfd_hash_entry * | |
c58b9523 AM |
784 | bfd_section_hash_newfunc (struct bfd_hash_entry *entry, |
785 | struct bfd_hash_table *table, | |
786 | const char *string) | |
73e87d70 AM |
787 | { |
788 | /* Allocate the structure if it has not already been allocated by a | |
789 | subclass. */ | |
790 | if (entry == NULL) | |
791 | { | |
d45913a0 DA |
792 | entry = (struct bfd_hash_entry *) |
793 | bfd_hash_allocate (table, sizeof (struct section_hash_entry)); | |
73e87d70 AM |
794 | if (entry == NULL) |
795 | return entry; | |
796 | } | |
797 | ||
798 | /* Call the allocation method of the superclass. */ | |
799 | entry = bfd_hash_newfunc (entry, table, string); | |
800 | if (entry != NULL) | |
c58b9523 AM |
801 | memset (&((struct section_hash_entry *) entry)->section, 0, |
802 | sizeof (asection)); | |
73e87d70 AM |
803 | |
804 | return entry; | |
805 | } | |
806 | ||
807 | #define section_hash_lookup(table, string, create, copy) \ | |
808 | ((struct section_hash_entry *) \ | |
809 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
810 | ||
f592407e AM |
811 | /* Create a symbol whose only job is to point to this section. This |
812 | is useful for things like relocs which are relative to the base | |
813 | of a section. */ | |
73e87d70 | 814 | |
0a1b45a2 | 815 | bool |
f592407e | 816 | _bfd_generic_new_section_hook (bfd *abfd, asection *newsect) |
73e87d70 | 817 | { |
73e87d70 AM |
818 | newsect->symbol = bfd_make_empty_symbol (abfd); |
819 | if (newsect->symbol == NULL) | |
0a1b45a2 | 820 | return false; |
73e87d70 AM |
821 | |
822 | newsect->symbol->name = newsect->name; | |
823 | newsect->symbol->value = 0; | |
824 | newsect->symbol->section = newsect; | |
825 | newsect->symbol->flags = BSF_SECTION_SYM; | |
826 | ||
827 | newsect->symbol_ptr_ptr = &newsect->symbol; | |
0a1b45a2 | 828 | return true; |
f592407e AM |
829 | } |
830 | ||
7cf7fcc8 | 831 | unsigned int _bfd_section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */ |
6f20ed8a | 832 | |
f592407e AM |
833 | /* Initializes a new section. NEWSECT->NAME is already set. */ |
834 | ||
835 | static asection * | |
836 | bfd_section_init (bfd *abfd, asection *newsect) | |
837 | { | |
7cf7fcc8 | 838 | newsect->id = _bfd_section_id; |
f592407e AM |
839 | newsect->index = abfd->section_count; |
840 | newsect->owner = abfd; | |
73e87d70 AM |
841 | |
842 | if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect))) | |
843 | return NULL; | |
844 | ||
7cf7fcc8 | 845 | _bfd_section_id++; |
73e87d70 | 846 | abfd->section_count++; |
5daa8fe7 | 847 | bfd_section_list_append (abfd, newsect); |
73e87d70 AM |
848 | return newsect; |
849 | } | |
850 | ||
252b5132 RH |
851 | /* |
852 | DOCDD | |
853 | INODE | |
854 | section prototypes, , typedef asection, Sections | |
855 | SUBSECTION | |
856 | Section prototypes | |
857 | ||
858 | These are the functions exported by the section handling part of BFD. | |
859 | */ | |
860 | ||
9e7b37b3 AM |
861 | /* |
862 | FUNCTION | |
863 | bfd_section_list_clear | |
864 | ||
865 | SYNOPSIS | |
866 | void bfd_section_list_clear (bfd *); | |
867 | ||
868 | DESCRIPTION | |
869 | Clears the section list, and also resets the section count and | |
870 | hash table entries. | |
871 | */ | |
872 | ||
873 | void | |
c58b9523 | 874 | bfd_section_list_clear (bfd *abfd) |
9e7b37b3 AM |
875 | { |
876 | abfd->sections = NULL; | |
5daa8fe7 | 877 | abfd->section_last = NULL; |
9e7b37b3 | 878 | abfd->section_count = 0; |
c58b9523 | 879 | memset (abfd->section_htab.table, 0, |
9e7b37b3 | 880 | abfd->section_htab.size * sizeof (struct bfd_hash_entry *)); |
c9ba0c87 | 881 | abfd->section_htab.count = 0; |
9e7b37b3 AM |
882 | } |
883 | ||
252b5132 RH |
884 | /* |
885 | FUNCTION | |
886 | bfd_get_section_by_name | |
887 | ||
888 | SYNOPSIS | |
c58b9523 | 889 | asection *bfd_get_section_by_name (bfd *abfd, const char *name); |
252b5132 RH |
890 | |
891 | DESCRIPTION | |
90061c33 AM |
892 | Return the most recently created section attached to @var{abfd} |
893 | named @var{name}. Return NULL if no such section exists. | |
252b5132 RH |
894 | */ |
895 | ||
896 | asection * | |
c58b9523 | 897 | bfd_get_section_by_name (bfd *abfd, const char *name) |
252b5132 | 898 | { |
73e87d70 AM |
899 | struct section_hash_entry *sh; |
900 | ||
0a1b45a2 | 901 | sh = section_hash_lookup (&abfd->section_htab, name, false, false); |
73e87d70 AM |
902 | if (sh != NULL) |
903 | return &sh->section; | |
252b5132 | 904 | |
252b5132 RH |
905 | return NULL; |
906 | } | |
907 | ||
90061c33 AM |
908 | /* |
909 | FUNCTION | |
910 | bfd_get_next_section_by_name | |
911 | ||
912 | SYNOPSIS | |
199af150 | 913 | asection *bfd_get_next_section_by_name (bfd *ibfd, asection *sec); |
90061c33 AM |
914 | |
915 | DESCRIPTION | |
916 | Given @var{sec} is a section returned by @code{bfd_get_section_by_name}, | |
917 | return the next most recently created section attached to the same | |
199af150 AM |
918 | BFD with the same name, or if no such section exists in the same BFD and |
919 | IBFD is non-NULL, the next section with the same name in any input | |
920 | BFD following IBFD. Return NULL on finding no section. | |
90061c33 AM |
921 | */ |
922 | ||
923 | asection * | |
199af150 | 924 | bfd_get_next_section_by_name (bfd *ibfd, asection *sec) |
90061c33 AM |
925 | { |
926 | struct section_hash_entry *sh; | |
927 | const char *name; | |
928 | unsigned long hash; | |
929 | ||
930 | sh = ((struct section_hash_entry *) | |
931 | ((char *) sec - offsetof (struct section_hash_entry, section))); | |
932 | ||
933 | hash = sh->root.hash; | |
934 | name = sec->name; | |
935 | for (sh = (struct section_hash_entry *) sh->root.next; | |
936 | sh != NULL; | |
937 | sh = (struct section_hash_entry *) sh->root.next) | |
938 | if (sh->root.hash == hash | |
939 | && strcmp (sh->root.string, name) == 0) | |
940 | return &sh->section; | |
941 | ||
199af150 AM |
942 | if (ibfd != NULL) |
943 | { | |
944 | while ((ibfd = ibfd->link.next) != NULL) | |
945 | { | |
946 | asection *s = bfd_get_section_by_name (ibfd, name); | |
947 | if (s != NULL) | |
948 | return s; | |
949 | } | |
950 | } | |
951 | ||
90061c33 AM |
952 | return NULL; |
953 | } | |
954 | ||
3d4d4302 AM |
955 | /* |
956 | FUNCTION | |
957 | bfd_get_linker_section | |
958 | ||
959 | SYNOPSIS | |
960 | asection *bfd_get_linker_section (bfd *abfd, const char *name); | |
961 | ||
962 | DESCRIPTION | |
963 | Return the linker created section attached to @var{abfd} | |
964 | named @var{name}. Return NULL if no such section exists. | |
965 | */ | |
966 | ||
967 | asection * | |
968 | bfd_get_linker_section (bfd *abfd, const char *name) | |
969 | { | |
970 | asection *sec = bfd_get_section_by_name (abfd, name); | |
971 | ||
972 | while (sec != NULL && (sec->flags & SEC_LINKER_CREATED) == 0) | |
199af150 | 973 | sec = bfd_get_next_section_by_name (NULL, sec); |
3d4d4302 AM |
974 | return sec; |
975 | } | |
976 | ||
fafe6678 L |
977 | /* |
978 | FUNCTION | |
979 | bfd_get_section_by_name_if | |
980 | ||
981 | SYNOPSIS | |
982 | asection *bfd_get_section_by_name_if | |
983 | (bfd *abfd, | |
984 | const char *name, | |
0a1b45a2 | 985 | bool (*func) (bfd *abfd, asection *sect, void *obj), |
fafe6678 L |
986 | void *obj); |
987 | ||
988 | DESCRIPTION | |
989 | Call the provided function @var{func} for each section | |
990 | attached to the BFD @var{abfd} whose name matches @var{name}, | |
991 | passing @var{obj} as an argument. The function will be called | |
992 | as if by | |
993 | ||
994 | | func (abfd, the_section, obj); | |
995 | ||
996 | It returns the first section for which @var{func} returns true, | |
997 | otherwise <<NULL>>. | |
998 | ||
999 | */ | |
1000 | ||
1001 | asection * | |
1002 | bfd_get_section_by_name_if (bfd *abfd, const char *name, | |
0a1b45a2 | 1003 | bool (*operation) (bfd *, asection *, void *), |
fafe6678 L |
1004 | void *user_storage) |
1005 | { | |
1006 | struct section_hash_entry *sh; | |
1007 | unsigned long hash; | |
1008 | ||
0a1b45a2 | 1009 | sh = section_hash_lookup (&abfd->section_htab, name, false, false); |
fafe6678 L |
1010 | if (sh == NULL) |
1011 | return NULL; | |
1012 | ||
1013 | hash = sh->root.hash; | |
2fb9328d AM |
1014 | for (; sh != NULL; sh = (struct section_hash_entry *) sh->root.next) |
1015 | if (sh->root.hash == hash | |
1016 | && strcmp (sh->root.string, name) == 0 | |
1017 | && (*operation) (abfd, &sh->section, user_storage)) | |
1018 | return &sh->section; | |
fafe6678 L |
1019 | |
1020 | return NULL; | |
1021 | } | |
1022 | ||
1bd91689 AM |
1023 | /* |
1024 | FUNCTION | |
1025 | bfd_get_unique_section_name | |
1026 | ||
1027 | SYNOPSIS | |
c58b9523 AM |
1028 | char *bfd_get_unique_section_name |
1029 | (bfd *abfd, const char *templat, int *count); | |
1bd91689 AM |
1030 | |
1031 | DESCRIPTION | |
1032 | Invent a section name that is unique in @var{abfd} by tacking | |
77cb06e9 AM |
1033 | a dot and a digit suffix onto the original @var{templat}. If |
1034 | @var{count} is non-NULL, then it specifies the first number | |
1035 | tried as a suffix to generate a unique name. The value | |
1036 | pointed to by @var{count} will be incremented in this case. | |
1bd91689 AM |
1037 | */ |
1038 | ||
1039 | char * | |
c58b9523 | 1040 | bfd_get_unique_section_name (bfd *abfd, const char *templat, int *count) |
1bd91689 AM |
1041 | { |
1042 | int num; | |
1043 | unsigned int len; | |
1044 | char *sname; | |
1045 | ||
a966dba9 | 1046 | len = strlen (templat); |
a50b1753 | 1047 | sname = (char *) bfd_malloc (len + 8); |
b3ea3584 AM |
1048 | if (sname == NULL) |
1049 | return NULL; | |
d4c88bbb | 1050 | memcpy (sname, templat, len); |
1bd91689 AM |
1051 | num = 1; |
1052 | if (count != NULL) | |
1053 | num = *count; | |
1054 | ||
1055 | do | |
1056 | { | |
1057 | /* If we have a million sections, something is badly wrong. */ | |
1058 | if (num > 999999) | |
1059 | abort (); | |
77cb06e9 | 1060 | sprintf (sname + len, ".%d", num++); |
1bd91689 | 1061 | } |
0a1b45a2 | 1062 | while (section_hash_lookup (&abfd->section_htab, sname, false, false)); |
1bd91689 AM |
1063 | |
1064 | if (count != NULL) | |
1065 | *count = num; | |
1066 | return sname; | |
1067 | } | |
1068 | ||
252b5132 RH |
1069 | /* |
1070 | FUNCTION | |
1071 | bfd_make_section_old_way | |
1072 | ||
1073 | SYNOPSIS | |
c58b9523 | 1074 | asection *bfd_make_section_old_way (bfd *abfd, const char *name); |
252b5132 RH |
1075 | |
1076 | DESCRIPTION | |
1077 | Create a new empty section called @var{name} | |
1078 | and attach it to the end of the chain of sections for the | |
1079 | BFD @var{abfd}. An attempt to create a section with a name which | |
1080 | is already in use returns its pointer without changing the | |
1081 | section chain. | |
1082 | ||
1083 | It has the funny name since this is the way it used to be | |
1084 | before it was rewritten.... | |
1085 | ||
1086 | Possible errors are: | |
1087 | o <<bfd_error_invalid_operation>> - | |
1088 | If output has already started for this BFD. | |
1089 | o <<bfd_error_no_memory>> - | |
1090 | If memory allocation fails. | |
1091 | ||
1092 | */ | |
1093 | ||
252b5132 | 1094 | asection * |
c58b9523 | 1095 | bfd_make_section_old_way (bfd *abfd, const char *name) |
252b5132 | 1096 | { |
73e87d70 AM |
1097 | asection *newsect; |
1098 | ||
1099 | if (abfd->output_has_begun) | |
1100 | { | |
1101 | bfd_set_error (bfd_error_invalid_operation); | |
1102 | return NULL; | |
1103 | } | |
1104 | ||
1105 | if (strcmp (name, BFD_ABS_SECTION_NAME) == 0) | |
f592407e AM |
1106 | newsect = bfd_abs_section_ptr; |
1107 | else if (strcmp (name, BFD_COM_SECTION_NAME) == 0) | |
1108 | newsect = bfd_com_section_ptr; | |
1109 | else if (strcmp (name, BFD_UND_SECTION_NAME) == 0) | |
1110 | newsect = bfd_und_section_ptr; | |
1111 | else if (strcmp (name, BFD_IND_SECTION_NAME) == 0) | |
1112 | newsect = bfd_ind_section_ptr; | |
1113 | else | |
1114 | { | |
1115 | struct section_hash_entry *sh; | |
73e87d70 | 1116 | |
0a1b45a2 | 1117 | sh = section_hash_lookup (&abfd->section_htab, name, true, false); |
f592407e AM |
1118 | if (sh == NULL) |
1119 | return NULL; | |
73e87d70 | 1120 | |
f592407e AM |
1121 | newsect = &sh->section; |
1122 | if (newsect->name != NULL) | |
1123 | { | |
1124 | /* Section already exists. */ | |
1125 | return newsect; | |
1126 | } | |
73e87d70 | 1127 | |
f592407e AM |
1128 | newsect->name = name; |
1129 | return bfd_section_init (abfd, newsect); | |
252b5132 | 1130 | } |
73e87d70 | 1131 | |
f592407e AM |
1132 | /* Call new_section_hook when "creating" the standard abs, com, und |
1133 | and ind sections to tack on format specific section data. | |
1134 | Also, create a proper section symbol. */ | |
1135 | if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect))) | |
1136 | return NULL; | |
1137 | return newsect; | |
252b5132 RH |
1138 | } |
1139 | ||
1140 | /* | |
1141 | FUNCTION | |
3496cb2a | 1142 | bfd_make_section_anyway_with_flags |
252b5132 RH |
1143 | |
1144 | SYNOPSIS | |
3496cb2a L |
1145 | asection *bfd_make_section_anyway_with_flags |
1146 | (bfd *abfd, const char *name, flagword flags); | |
252b5132 RH |
1147 | |
1148 | DESCRIPTION | |
1149 | Create a new empty section called @var{name} and attach it to the end of | |
1150 | the chain of sections for @var{abfd}. Create a new section even if there | |
3496cb2a L |
1151 | is already a section with that name. Also set the attributes of the |
1152 | new section to the value @var{flags}. | |
252b5132 RH |
1153 | |
1154 | Return <<NULL>> and set <<bfd_error>> on error; possible errors are: | |
1155 | o <<bfd_error_invalid_operation>> - If output has already started for @var{abfd}. | |
1156 | o <<bfd_error_no_memory>> - If memory allocation fails. | |
1157 | */ | |
1158 | ||
1159 | sec_ptr | |
3496cb2a L |
1160 | bfd_make_section_anyway_with_flags (bfd *abfd, const char *name, |
1161 | flagword flags) | |
252b5132 | 1162 | { |
73e87d70 | 1163 | struct section_hash_entry *sh; |
252b5132 | 1164 | asection *newsect; |
252b5132 RH |
1165 | |
1166 | if (abfd->output_has_begun) | |
1167 | { | |
1168 | bfd_set_error (bfd_error_invalid_operation); | |
1169 | return NULL; | |
1170 | } | |
1171 | ||
0a1b45a2 | 1172 | sh = section_hash_lookup (&abfd->section_htab, name, true, false); |
73e87d70 | 1173 | if (sh == NULL) |
252b5132 RH |
1174 | return NULL; |
1175 | ||
73e87d70 AM |
1176 | newsect = &sh->section; |
1177 | if (newsect->name != NULL) | |
4d7ce4dd | 1178 | { |
72adc230 AM |
1179 | /* We are making a section of the same name. Put it in the |
1180 | section hash table. Even though we can't find it directly by a | |
1181 | hash lookup, we'll be able to find the section by traversing | |
1182 | sh->root.next quicker than looking at all the bfd sections. */ | |
1183 | struct section_hash_entry *new_sh; | |
1184 | new_sh = (struct section_hash_entry *) | |
1185 | bfd_section_hash_newfunc (NULL, &abfd->section_htab, name); | |
1186 | if (new_sh == NULL) | |
73e87d70 | 1187 | return NULL; |
72adc230 | 1188 | |
73499ab8 | 1189 | new_sh->root = sh->root; |
72adc230 AM |
1190 | sh->root.next = &new_sh->root; |
1191 | newsect = &new_sh->section; | |
252b5132 RH |
1192 | } |
1193 | ||
3496cb2a | 1194 | newsect->flags = flags; |
73e87d70 AM |
1195 | newsect->name = name; |
1196 | return bfd_section_init (abfd, newsect); | |
252b5132 RH |
1197 | } |
1198 | ||
1199 | /* | |
1200 | FUNCTION | |
3496cb2a | 1201 | bfd_make_section_anyway |
252b5132 RH |
1202 | |
1203 | SYNOPSIS | |
3496cb2a L |
1204 | asection *bfd_make_section_anyway (bfd *abfd, const char *name); |
1205 | ||
1206 | DESCRIPTION | |
1207 | Create a new empty section called @var{name} and attach it to the end of | |
1208 | the chain of sections for @var{abfd}. Create a new section even if there | |
1209 | is already a section with that name. | |
1210 | ||
1211 | Return <<NULL>> and set <<bfd_error>> on error; possible errors are: | |
1212 | o <<bfd_error_invalid_operation>> - If output has already started for @var{abfd}. | |
1213 | o <<bfd_error_no_memory>> - If memory allocation fails. | |
1214 | */ | |
1215 | ||
1216 | sec_ptr | |
1217 | bfd_make_section_anyway (bfd *abfd, const char *name) | |
1218 | { | |
1219 | return bfd_make_section_anyway_with_flags (abfd, name, 0); | |
1220 | } | |
1221 | ||
1222 | /* | |
1223 | FUNCTION | |
1224 | bfd_make_section_with_flags | |
1225 | ||
1226 | SYNOPSIS | |
1227 | asection *bfd_make_section_with_flags | |
1228 | (bfd *, const char *name, flagword flags); | |
252b5132 RH |
1229 | |
1230 | DESCRIPTION | |
1231 | Like <<bfd_make_section_anyway>>, but return <<NULL>> (without calling | |
1232 | bfd_set_error ()) without changing the section chain if there is already a | |
3496cb2a L |
1233 | section named @var{name}. Also set the attributes of the new section to |
1234 | the value @var{flags}. If there is an error, return <<NULL>> and set | |
252b5132 RH |
1235 | <<bfd_error>>. |
1236 | */ | |
1237 | ||
1238 | asection * | |
3496cb2a L |
1239 | bfd_make_section_with_flags (bfd *abfd, const char *name, |
1240 | flagword flags) | |
252b5132 | 1241 | { |
73e87d70 AM |
1242 | struct section_hash_entry *sh; |
1243 | asection *newsect; | |
252b5132 | 1244 | |
8bdf0be1 | 1245 | if (abfd == NULL || name == NULL || abfd->output_has_begun) |
252b5132 | 1246 | { |
73e87d70 AM |
1247 | bfd_set_error (bfd_error_invalid_operation); |
1248 | return NULL; | |
252b5132 RH |
1249 | } |
1250 | ||
73e87d70 AM |
1251 | if (strcmp (name, BFD_ABS_SECTION_NAME) == 0 |
1252 | || strcmp (name, BFD_COM_SECTION_NAME) == 0 | |
1253 | || strcmp (name, BFD_UND_SECTION_NAME) == 0 | |
1254 | || strcmp (name, BFD_IND_SECTION_NAME) == 0) | |
1255 | return NULL; | |
252b5132 | 1256 | |
0a1b45a2 | 1257 | sh = section_hash_lookup (&abfd->section_htab, name, true, false); |
73e87d70 AM |
1258 | if (sh == NULL) |
1259 | return NULL; | |
1260 | ||
1261 | newsect = &sh->section; | |
1262 | if (newsect->name != NULL) | |
252b5132 | 1263 | { |
73e87d70 | 1264 | /* Section already exists. */ |
003d627e | 1265 | return NULL; |
252b5132 RH |
1266 | } |
1267 | ||
73e87d70 | 1268 | newsect->name = name; |
3496cb2a | 1269 | newsect->flags = flags; |
73e87d70 | 1270 | return bfd_section_init (abfd, newsect); |
252b5132 RH |
1271 | } |
1272 | ||
3496cb2a L |
1273 | /* |
1274 | FUNCTION | |
1275 | bfd_make_section | |
1276 | ||
1277 | SYNOPSIS | |
1278 | asection *bfd_make_section (bfd *, const char *name); | |
1279 | ||
1280 | DESCRIPTION | |
1281 | Like <<bfd_make_section_anyway>>, but return <<NULL>> (without calling | |
1282 | bfd_set_error ()) without changing the section chain if there is already a | |
1283 | section named @var{name}. If there is an error, return <<NULL>> and set | |
1284 | <<bfd_error>>. | |
1285 | */ | |
1286 | ||
1287 | asection * | |
1288 | bfd_make_section (bfd *abfd, const char *name) | |
1289 | { | |
1290 | return bfd_make_section_with_flags (abfd, name, 0); | |
1291 | } | |
1292 | ||
252b5132 RH |
1293 | /* |
1294 | FUNCTION | |
1295 | bfd_set_section_flags | |
1296 | ||
1297 | SYNOPSIS | |
0a1b45a2 | 1298 | bool bfd_set_section_flags (asection *sec, flagword flags); |
252b5132 RH |
1299 | |
1300 | DESCRIPTION | |
fd361982 AM |
1301 | Set the attributes of the section @var{sec} to the value @var{flags}. |
1302 | Return <<TRUE>> on success, <<FALSE>> on error. Possible error | |
1303 | returns are: | |
252b5132 RH |
1304 | |
1305 | o <<bfd_error_invalid_operation>> - | |
1306 | The section cannot have one or more of the attributes | |
1307 | requested. For example, a .bss section in <<a.out>> may not | |
1308 | have the <<SEC_HAS_CONTENTS>> field set. | |
1309 | ||
1310 | */ | |
1311 | ||
0a1b45a2 | 1312 | bool |
fd361982 | 1313 | bfd_set_section_flags (asection *section, flagword flags) |
252b5132 | 1314 | { |
252b5132 | 1315 | section->flags = flags; |
0a1b45a2 | 1316 | return true; |
252b5132 RH |
1317 | } |
1318 | ||
4e011fb5 AM |
1319 | /* |
1320 | FUNCTION | |
1321 | bfd_rename_section | |
1322 | ||
1323 | SYNOPSIS | |
1324 | void bfd_rename_section | |
fd361982 | 1325 | (asection *sec, const char *newname); |
4e011fb5 AM |
1326 | |
1327 | DESCRIPTION | |
fd361982 | 1328 | Rename section @var{sec} to @var{newname}. |
4e011fb5 AM |
1329 | */ |
1330 | ||
1331 | void | |
fd361982 | 1332 | bfd_rename_section (asection *sec, const char *newname) |
4e011fb5 AM |
1333 | { |
1334 | struct section_hash_entry *sh; | |
1335 | ||
1336 | sh = (struct section_hash_entry *) | |
1337 | ((char *) sec - offsetof (struct section_hash_entry, section)); | |
1338 | sh->section.name = newname; | |
fd361982 | 1339 | bfd_hash_rename (&sec->owner->section_htab, newname, &sh->root); |
4e011fb5 AM |
1340 | } |
1341 | ||
252b5132 RH |
1342 | /* |
1343 | FUNCTION | |
1344 | bfd_map_over_sections | |
1345 | ||
1346 | SYNOPSIS | |
c58b9523 AM |
1347 | void bfd_map_over_sections |
1348 | (bfd *abfd, | |
1349 | void (*func) (bfd *abfd, asection *sect, void *obj), | |
1350 | void *obj); | |
252b5132 RH |
1351 | |
1352 | DESCRIPTION | |
1353 | Call the provided function @var{func} for each section | |
1354 | attached to the BFD @var{abfd}, passing @var{obj} as an | |
1355 | argument. The function will be called as if by | |
1356 | ||
c58b9523 | 1357 | | func (abfd, the_section, obj); |
252b5132 | 1358 | |
7dee875e | 1359 | This is the preferred method for iterating over sections; an |
252b5132 RH |
1360 | alternative would be to use a loop: |
1361 | ||
c06fc9eb | 1362 | | asection *p; |
252b5132 | 1363 | | for (p = abfd->sections; p != NULL; p = p->next) |
c58b9523 | 1364 | | func (abfd, p, ...) |
252b5132 | 1365 | |
252b5132 RH |
1366 | */ |
1367 | ||
252b5132 | 1368 | void |
c58b9523 AM |
1369 | bfd_map_over_sections (bfd *abfd, |
1370 | void (*operation) (bfd *, asection *, void *), | |
1371 | void *user_storage) | |
252b5132 RH |
1372 | { |
1373 | asection *sect; | |
1374 | unsigned int i = 0; | |
1375 | ||
1376 | for (sect = abfd->sections; sect != NULL; i++, sect = sect->next) | |
1377 | (*operation) (abfd, sect, user_storage); | |
1378 | ||
1379 | if (i != abfd->section_count) /* Debugging */ | |
1380 | abort (); | |
1381 | } | |
1382 | ||
bc87dd2e L |
1383 | /* |
1384 | FUNCTION | |
1385 | bfd_sections_find_if | |
1386 | ||
1387 | SYNOPSIS | |
1388 | asection *bfd_sections_find_if | |
1389 | (bfd *abfd, | |
0a1b45a2 | 1390 | bool (*operation) (bfd *abfd, asection *sect, void *obj), |
bc87dd2e L |
1391 | void *obj); |
1392 | ||
1393 | DESCRIPTION | |
f4eae89c | 1394 | Call the provided function @var{operation} for each section |
bc87dd2e L |
1395 | attached to the BFD @var{abfd}, passing @var{obj} as an |
1396 | argument. The function will be called as if by | |
1397 | ||
f4eae89c | 1398 | | operation (abfd, the_section, obj); |
bc87dd2e | 1399 | |
f4eae89c | 1400 | It returns the first section for which @var{operation} returns true. |
bc87dd2e L |
1401 | |
1402 | */ | |
1403 | ||
1404 | asection * | |
1405 | bfd_sections_find_if (bfd *abfd, | |
0a1b45a2 | 1406 | bool (*operation) (bfd *, asection *, void *), |
bc87dd2e L |
1407 | void *user_storage) |
1408 | { | |
1409 | asection *sect; | |
1410 | ||
1411 | for (sect = abfd->sections; sect != NULL; sect = sect->next) | |
1412 | if ((*operation) (abfd, sect, user_storage)) | |
1413 | break; | |
1414 | ||
1415 | return sect; | |
1416 | } | |
1417 | ||
252b5132 RH |
1418 | /* |
1419 | FUNCTION | |
1420 | bfd_set_section_size | |
1421 | ||
1422 | SYNOPSIS | |
0a1b45a2 | 1423 | bool bfd_set_section_size (asection *sec, bfd_size_type val); |
252b5132 RH |
1424 | |
1425 | DESCRIPTION | |
1426 | Set @var{sec} to the size @var{val}. If the operation is | |
b34976b6 | 1427 | ok, then <<TRUE>> is returned, else <<FALSE>>. |
252b5132 RH |
1428 | |
1429 | Possible error returns: | |
1430 | o <<bfd_error_invalid_operation>> - | |
1431 | Writing has started to the BFD, so setting the size is invalid. | |
1432 | ||
1433 | */ | |
1434 | ||
0a1b45a2 | 1435 | bool |
fd361982 | 1436 | bfd_set_section_size (asection *sec, bfd_size_type val) |
252b5132 RH |
1437 | { |
1438 | /* Once you've started writing to any section you cannot create or change | |
7b82c249 | 1439 | the size of any others. */ |
252b5132 | 1440 | |
fd361982 | 1441 | if (sec->owner == NULL || sec->owner->output_has_begun) |
252b5132 RH |
1442 | { |
1443 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 1444 | return false; |
252b5132 RH |
1445 | } |
1446 | ||
fd361982 | 1447 | sec->size = val; |
0a1b45a2 | 1448 | return true; |
252b5132 RH |
1449 | } |
1450 | ||
1451 | /* | |
1452 | FUNCTION | |
1453 | bfd_set_section_contents | |
1454 | ||
1455 | SYNOPSIS | |
0a1b45a2 | 1456 | bool bfd_set_section_contents |
85302095 AC |
1457 | (bfd *abfd, asection *section, const void *data, |
1458 | file_ptr offset, bfd_size_type count); | |
252b5132 | 1459 | |
252b5132 RH |
1460 | DESCRIPTION |
1461 | Sets the contents of the section @var{section} in BFD | |
c8d3f932 MW |
1462 | @var{abfd} to the data starting in memory at @var{location}. |
1463 | The data is written to the output section starting at offset | |
9a968f43 | 1464 | @var{offset} for @var{count} octets. |
252b5132 | 1465 | |
c8d3f932 MW |
1466 | Normally <<TRUE>> is returned, but <<FALSE>> is returned if |
1467 | there was an error. Possible error returns are: | |
252b5132 RH |
1468 | o <<bfd_error_no_contents>> - |
1469 | The output section does not have the <<SEC_HAS_CONTENTS>> | |
1470 | attribute, so nothing can be written to it. | |
c8d3f932 MW |
1471 | o <<bfd_error_bad_value>> - |
1472 | The section is unable to contain all of the data. | |
1473 | o <<bfd_error_invalid_operation>> - | |
1474 | The BFD is not writeable. | |
1475 | o and some more too. | |
252b5132 RH |
1476 | |
1477 | This routine is front end to the back end function | |
1478 | <<_bfd_set_section_contents>>. | |
1479 | ||
252b5132 RH |
1480 | */ |
1481 | ||
0a1b45a2 | 1482 | bool |
c58b9523 AM |
1483 | bfd_set_section_contents (bfd *abfd, |
1484 | sec_ptr section, | |
85302095 | 1485 | const void *location, |
c58b9523 AM |
1486 | file_ptr offset, |
1487 | bfd_size_type count) | |
252b5132 RH |
1488 | { |
1489 | bfd_size_type sz; | |
1490 | ||
fd361982 | 1491 | if (!(bfd_section_flags (section) & SEC_HAS_CONTENTS)) |
252b5132 RH |
1492 | { |
1493 | bfd_set_error (bfd_error_no_contents); | |
0a1b45a2 | 1494 | return false; |
252b5132 RH |
1495 | } |
1496 | ||
eea6121a | 1497 | sz = section->size; |
dc810e39 | 1498 | if ((bfd_size_type) offset > sz |
6db658c5 | 1499 | || count > sz - offset |
dc810e39 | 1500 | || count != (size_t) count) |
252b5132 | 1501 | { |
252b5132 | 1502 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 1503 | return false; |
252b5132 | 1504 | } |
252b5132 | 1505 | |
26ae6d5e | 1506 | if (!bfd_write_p (abfd)) |
252b5132 | 1507 | { |
252b5132 | 1508 | bfd_set_error (bfd_error_invalid_operation); |
0a1b45a2 | 1509 | return false; |
252b5132 RH |
1510 | } |
1511 | ||
9a951beb RH |
1512 | /* Record a copy of the data in memory if desired. */ |
1513 | if (section->contents | |
c58b9523 | 1514 | && location != section->contents + offset) |
dc810e39 | 1515 | memcpy (section->contents + offset, location, (size_t) count); |
9a951beb | 1516 | |
252b5132 RH |
1517 | if (BFD_SEND (abfd, _bfd_set_section_contents, |
1518 | (abfd, section, location, offset, count))) | |
1519 | { | |
0a1b45a2 AM |
1520 | abfd->output_has_begun = true; |
1521 | return true; | |
252b5132 RH |
1522 | } |
1523 | ||
0a1b45a2 | 1524 | return false; |
252b5132 RH |
1525 | } |
1526 | ||
1527 | /* | |
1528 | FUNCTION | |
1529 | bfd_get_section_contents | |
1530 | ||
1531 | SYNOPSIS | |
0a1b45a2 | 1532 | bool bfd_get_section_contents |
c58b9523 AM |
1533 | (bfd *abfd, asection *section, void *location, file_ptr offset, |
1534 | bfd_size_type count); | |
252b5132 RH |
1535 | |
1536 | DESCRIPTION | |
1537 | Read data from @var{section} in BFD @var{abfd} | |
1538 | into memory starting at @var{location}. The data is read at an | |
1539 | offset of @var{offset} from the start of the input section, | |
1540 | and is read for @var{count} bytes. | |
1541 | ||
1542 | If the contents of a constructor with the <<SEC_CONSTRUCTOR>> | |
1543 | flag set are requested or if the section does not have the | |
1544 | <<SEC_HAS_CONTENTS>> flag set, then the @var{location} is filled | |
b34976b6 AM |
1545 | with zeroes. If no errors occur, <<TRUE>> is returned, else |
1546 | <<FALSE>>. | |
252b5132 | 1547 | |
252b5132 | 1548 | */ |
0a1b45a2 | 1549 | bool |
c58b9523 AM |
1550 | bfd_get_section_contents (bfd *abfd, |
1551 | sec_ptr section, | |
1552 | void *location, | |
1553 | file_ptr offset, | |
1554 | bfd_size_type count) | |
252b5132 RH |
1555 | { |
1556 | bfd_size_type sz; | |
1557 | ||
1558 | if (section->flags & SEC_CONSTRUCTOR) | |
1559 | { | |
dc810e39 | 1560 | memset (location, 0, (size_t) count); |
0a1b45a2 | 1561 | return true; |
252b5132 RH |
1562 | } |
1563 | ||
e57278ef AM |
1564 | if (abfd->direction != write_direction && section->rawsize != 0) |
1565 | sz = section->rawsize; | |
1566 | else | |
1567 | sz = section->size; | |
dc810e39 | 1568 | if ((bfd_size_type) offset > sz |
6db658c5 | 1569 | || count > sz - offset |
dc810e39 | 1570 | || count != (size_t) count) |
252b5132 | 1571 | { |
252b5132 | 1572 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 1573 | return false; |
252b5132 | 1574 | } |
252b5132 RH |
1575 | |
1576 | if (count == 0) | |
1577 | /* Don't bother. */ | |
0a1b45a2 | 1578 | return true; |
252b5132 RH |
1579 | |
1580 | if ((section->flags & SEC_HAS_CONTENTS) == 0) | |
1581 | { | |
dc810e39 | 1582 | memset (location, 0, (size_t) count); |
0a1b45a2 | 1583 | return true; |
252b5132 RH |
1584 | } |
1585 | ||
1586 | if ((section->flags & SEC_IN_MEMORY) != 0) | |
1587 | { | |
ea882e87 NC |
1588 | if (section->contents == NULL) |
1589 | { | |
1590 | /* This can happen because of errors earlier on in the linking process. | |
1591 | We do not want to seg-fault here, so clear the flag and return an | |
1592 | error code. */ | |
1593 | section->flags &= ~ SEC_IN_MEMORY; | |
1594 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 1595 | return false; |
ea882e87 | 1596 | } |
68ffbac6 | 1597 | |
ddda4adc | 1598 | memmove (location, section->contents + offset, (size_t) count); |
0a1b45a2 | 1599 | return true; |
252b5132 RH |
1600 | } |
1601 | ||
1602 | return BFD_SEND (abfd, _bfd_get_section_contents, | |
1603 | (abfd, section, location, offset, count)); | |
1604 | } | |
1605 | ||
eea6121a AM |
1606 | /* |
1607 | FUNCTION | |
1608 | bfd_malloc_and_get_section | |
1609 | ||
1610 | SYNOPSIS | |
0a1b45a2 | 1611 | bool bfd_malloc_and_get_section |
eea6121a AM |
1612 | (bfd *abfd, asection *section, bfd_byte **buf); |
1613 | ||
1614 | DESCRIPTION | |
1615 | Read all data from @var{section} in BFD @var{abfd} | |
1616 | into a buffer, *@var{buf}, malloc'd by this function. | |
1617 | */ | |
1618 | ||
0a1b45a2 | 1619 | bool |
eea6121a AM |
1620 | bfd_malloc_and_get_section (bfd *abfd, sec_ptr sec, bfd_byte **buf) |
1621 | { | |
4a114e3e L |
1622 | *buf = NULL; |
1623 | return bfd_get_full_section_contents (abfd, sec, buf); | |
eea6121a | 1624 | } |
252b5132 RH |
1625 | /* |
1626 | FUNCTION | |
1627 | bfd_copy_private_section_data | |
1628 | ||
1629 | SYNOPSIS | |
0a1b45a2 | 1630 | bool bfd_copy_private_section_data |
c58b9523 | 1631 | (bfd *ibfd, asection *isec, bfd *obfd, asection *osec); |
252b5132 RH |
1632 | |
1633 | DESCRIPTION | |
1634 | Copy private section information from @var{isec} in the BFD | |
1635 | @var{ibfd} to the section @var{osec} in the BFD @var{obfd}. | |
b34976b6 | 1636 | Return <<TRUE>> on success, <<FALSE>> on error. Possible error |
252b5132 RH |
1637 | returns are: |
1638 | ||
1639 | o <<bfd_error_no_memory>> - | |
1640 | Not enough memory exists to create private data for @var{osec}. | |
1641 | ||
1642 | .#define bfd_copy_private_section_data(ibfd, isection, obfd, osection) \ | |
07d6d2b8 AM |
1643 | . BFD_SEND (obfd, _bfd_copy_private_section_data, \ |
1644 | . (ibfd, isection, obfd, osection)) | |
252b5132 RH |
1645 | */ |
1646 | ||
72adc230 AM |
1647 | /* |
1648 | FUNCTION | |
1649 | bfd_generic_is_group_section | |
1650 | ||
1651 | SYNOPSIS | |
0a1b45a2 | 1652 | bool bfd_generic_is_group_section (bfd *, const asection *sec); |
72adc230 AM |
1653 | |
1654 | DESCRIPTION | |
1655 | Returns TRUE if @var{sec} is a member of a group. | |
1656 | */ | |
1657 | ||
0a1b45a2 | 1658 | bool |
72adc230 AM |
1659 | bfd_generic_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, |
1660 | const asection *sec ATTRIBUTE_UNUSED) | |
1661 | { | |
0a1b45a2 | 1662 | return false; |
72adc230 AM |
1663 | } |
1664 | ||
cb7f4b29 AM |
1665 | /* |
1666 | FUNCTION | |
1667 | bfd_generic_group_name | |
1668 | ||
1669 | SYNOPSIS | |
1670 | const char *bfd_generic_group_name (bfd *, const asection *sec); | |
1671 | ||
1672 | DESCRIPTION | |
1673 | Returns group name if @var{sec} is a member of a group. | |
1674 | */ | |
1675 | ||
1676 | const char * | |
1677 | bfd_generic_group_name (bfd *abfd ATTRIBUTE_UNUSED, | |
1678 | const asection *sec ATTRIBUTE_UNUSED) | |
1679 | { | |
1680 | return NULL; | |
1681 | } | |
1682 | ||
b885599b AM |
1683 | /* |
1684 | FUNCTION | |
e61463e1 | 1685 | bfd_generic_discard_group |
b885599b AM |
1686 | |
1687 | SYNOPSIS | |
0a1b45a2 | 1688 | bool bfd_generic_discard_group (bfd *abfd, asection *group); |
b885599b AM |
1689 | |
1690 | DESCRIPTION | |
1691 | Remove all members of @var{group} from the output. | |
1692 | */ | |
1693 | ||
0a1b45a2 | 1694 | bool |
c58b9523 AM |
1695 | bfd_generic_discard_group (bfd *abfd ATTRIBUTE_UNUSED, |
1696 | asection *group ATTRIBUTE_UNUSED) | |
b885599b | 1697 | { |
0a1b45a2 | 1698 | return true; |
b885599b | 1699 | } |
d00dd7dc | 1700 | |
0a1b45a2 | 1701 | bool |
d00dd7dc AM |
1702 | _bfd_nowrite_set_section_contents (bfd *abfd, |
1703 | sec_ptr section ATTRIBUTE_UNUSED, | |
1704 | const void *location ATTRIBUTE_UNUSED, | |
1705 | file_ptr offset ATTRIBUTE_UNUSED, | |
1706 | bfd_size_type count ATTRIBUTE_UNUSED) | |
1707 | { | |
1708 | return _bfd_bool_bfd_false_error (abfd); | |
1709 | } |