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252b5132 | 1 | /* Object file "section" support for the BFD library. |
d87bef3a | 2 | Copyright (C) 1990-2023 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 | . | |
57594b6a AM |
154 | . {* The next section in the list belonging to the BFD, or NULL. *} |
155 | . struct bfd_section *next; | |
156 | . | |
157 | . {* The previous section in the list belonging to the BFD, or NULL. *} | |
158 | . struct bfd_section *prev; | |
159 | . | |
52b219b5 | 160 | . {* A unique sequence number. *} |
7292b3ac | 161 | . unsigned int id; |
252b5132 | 162 | . |
a8c4d40b L |
163 | . {* A unique section number which can be used by assembler to |
164 | . distinguish different sections with the same section name. *} | |
165 | . unsigned int section_id; | |
166 | . | |
dbb410c3 | 167 | . {* Which section in the bfd; 0..n-1 as sections are created in a bfd. *} |
7292b3ac | 168 | . unsigned int index; |
252b5132 | 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 | . |
da16cc96 AM |
339 | . {* Indicate that section has the purecode flag set. *} |
340 | .#define SEC_ELF_PURECODE 0x8000000 | |
0ce398f1 | 341 | . |
ebe372c1 L |
342 | . {* When a section with this flag is being linked, then if the size of |
343 | . the input section is less than a page, it should not cross a page | |
344 | . boundary. If the size of the input section is one page or more, | |
345 | . it should be aligned on a page boundary. This is for TI | |
346 | . TMS320C54X only. *} | |
07d6d2b8 | 347 | .#define SEC_TIC54X_BLOCK 0x10000000 |
ebe372c1 L |
348 | . |
349 | . {* Conditionally link this section; do not link if there are no | |
350 | . references found to any symbol in the section. This is for TI | |
351 | . TMS320C54X only. *} | |
07d6d2b8 | 352 | .#define SEC_TIC54X_CLINK 0x20000000 |
dbb410c3 | 353 | . |
9361e630 | 354 | . {* This section contains vliw code. This is for Toshiba MeP only. *} |
07d6d2b8 | 355 | .#define SEC_MEP_VLIW 0x20000000 |
9361e630 | 356 | . |
61826503 CE |
357 | . {* All symbols, sizes and relocations in this section are octets |
358 | . instead of bytes. Required for DWARF debug sections as DWARF | |
359 | . information is organized in octets, not bytes. *} | |
360 | .#define SEC_ELF_OCTETS 0x40000000 | |
361 | . | |
156621f3 KT |
362 | . {* Indicate that section has the no read flag set. This happens |
363 | . when memory read flag isn't set. *} | |
07d6d2b8 | 364 | .#define SEC_COFF_NOREAD 0x40000000 |
156621f3 | 365 | . |
52b219b5 | 366 | . {* End of section flags. *} |
252b5132 | 367 | . |
52b219b5 | 368 | . {* Some internal packed boolean fields. *} |
252b5132 | 369 | . |
52b219b5 AM |
370 | . {* See the vma field. *} |
371 | . unsigned int user_set_vma : 1; | |
252b5132 | 372 | . |
52b219b5 AM |
373 | . {* A mark flag used by some of the linker backends. *} |
374 | . unsigned int linker_mark : 1; | |
252b5132 | 375 | . |
d1778b88 | 376 | . {* Another mark flag used by some of the linker backends. Set for |
08da05b0 | 377 | . output sections that have an input section. *} |
d1778b88 AM |
378 | . unsigned int linker_has_input : 1; |
379 | . | |
9d0a14d3 | 380 | . {* Mark flag used by some linker backends for garbage collection. *} |
52b219b5 | 381 | . unsigned int gc_mark : 1; |
252b5132 | 382 | . |
4a114e3e L |
383 | . {* Section compression status. *} |
384 | . unsigned int compress_status : 2; | |
385 | .#define COMPRESS_SECTION_NONE 0 | |
386 | .#define COMPRESS_SECTION_DONE 1 | |
2cac01e3 FS |
387 | .#define DECOMPRESS_SECTION_ZLIB 2 |
388 | .#define DECOMPRESS_SECTION_ZSTD 3 | |
4a114e3e | 389 | . |
68bfbfcc AM |
390 | . {* The following flags are used by the ELF linker. *} |
391 | . | |
392 | . {* Mark sections which have been allocated to segments. *} | |
bc67d8a6 NC |
393 | . unsigned int segment_mark : 1; |
394 | . | |
68bfbfcc AM |
395 | . {* Type of sec_info information. *} |
396 | . unsigned int sec_info_type:3; | |
dbaa2011 AM |
397 | .#define SEC_INFO_TYPE_NONE 0 |
398 | .#define SEC_INFO_TYPE_STABS 1 | |
399 | .#define SEC_INFO_TYPE_MERGE 2 | |
400 | .#define SEC_INFO_TYPE_EH_FRAME 3 | |
401 | .#define SEC_INFO_TYPE_JUST_SYMS 4 | |
5446cbdf | 402 | .#define SEC_INFO_TYPE_TARGET 5 |
2f0c68f2 | 403 | .#define SEC_INFO_TYPE_EH_FRAME_ENTRY 6 |
cf0e0a0b | 404 | .#define SEC_INFO_TYPE_SFRAME 7 |
68bfbfcc AM |
405 | . |
406 | . {* Nonzero if this section uses RELA relocations, rather than REL. *} | |
407 | . unsigned int use_rela_p:1; | |
408 | . | |
4c52953f AM |
409 | . {* Bits used by various backends. The generic code doesn't touch |
410 | . these fields. *} | |
68bfbfcc | 411 | . |
b0dddeec AM |
412 | . unsigned int sec_flg0:1; |
413 | . unsigned int sec_flg1:1; | |
414 | . unsigned int sec_flg2:1; | |
415 | . unsigned int sec_flg3:1; | |
416 | . unsigned int sec_flg4:1; | |
417 | . unsigned int sec_flg5:1; | |
68bfbfcc | 418 | . |
52b219b5 | 419 | . {* End of internal packed boolean fields. *} |
252b5132 | 420 | . |
52b219b5 AM |
421 | . {* The virtual memory address of the section - where it will be |
422 | . at run time. The symbols are relocated against this. The | |
423 | . user_set_vma flag is maintained by bfd; if it's not set, the | |
424 | . backend can assign addresses (for example, in <<a.out>>, where | |
425 | . the default address for <<.data>> is dependent on the specific | |
426 | . target and various flags). *} | |
52b219b5 | 427 | . bfd_vma vma; |
252b5132 | 428 | . |
52b219b5 AM |
429 | . {* The load address of the section - where it would be in a |
430 | . rom image; really only used for writing section header | |
b5f79c76 | 431 | . information. *} |
52b219b5 | 432 | . bfd_vma lma; |
252b5132 | 433 | . |
37b01f6a | 434 | . {* The size of the section in *octets*, as it will be output. |
52b219b5 | 435 | . Contains a value even if the section has no contents (e.g., the |
eea6121a AM |
436 | . size of <<.bss>>). *} |
437 | . bfd_size_type size; | |
438 | . | |
1a23a9e6 | 439 | . {* For input sections, the original size on disk of the section, in |
73c5c7a8 BW |
440 | . octets. This field should be set for any section whose size is |
441 | . changed by linker relaxation. It is required for sections where | |
442 | . the linker relaxation scheme doesn't cache altered section and | |
443 | . reloc contents (stabs, eh_frame, SEC_MERGE, some coff relaxing | |
444 | . targets), and thus the original size needs to be kept to read the | |
445 | . section multiple times. For output sections, rawsize holds the | |
446 | . section size calculated on a previous linker relaxation pass. *} | |
eea6121a | 447 | . bfd_size_type rawsize; |
252b5132 | 448 | . |
4a114e3e L |
449 | . {* The compressed size of the section in octets. *} |
450 | . bfd_size_type compressed_size; | |
451 | . | |
52b219b5 AM |
452 | . {* If this section is going to be output, then this value is the |
453 | . offset in *bytes* into the output section of the first byte in the | |
454 | . input section (byte ==> smallest addressable unit on the | |
455 | . target). In most cases, if this was going to start at the | |
456 | . 100th octet (8-bit quantity) in the output section, this value | |
457 | . would be 100. However, if the target byte size is 16 bits | |
458 | . (bfd_octets_per_byte is "2"), this value would be 50. *} | |
52b219b5 | 459 | . bfd_vma output_offset; |
252b5132 | 460 | . |
52b219b5 | 461 | . {* The output section through which to map on output. *} |
198beae2 | 462 | . struct bfd_section *output_section; |
252b5132 | 463 | . |
52b219b5 AM |
464 | . {* If an input section, a pointer to a vector of relocation |
465 | . records for the data in this section. *} | |
52b219b5 | 466 | . struct reloc_cache_entry *relocation; |
252b5132 | 467 | . |
52b219b5 AM |
468 | . {* If an output section, a pointer to a vector of pointers to |
469 | . relocation records for the data in this section. *} | |
52b219b5 | 470 | . struct reloc_cache_entry **orelocation; |
252b5132 | 471 | . |
b5f79c76 | 472 | . {* The number of relocation records in one of the above. *} |
52b219b5 | 473 | . unsigned reloc_count; |
252b5132 | 474 | . |
57594b6a AM |
475 | . {* The alignment requirement of the section, as an exponent of 2 - |
476 | . e.g., 3 aligns to 2^3 (or 8). *} | |
477 | . unsigned int alignment_power; | |
478 | . | |
52b219b5 AM |
479 | . {* Information below is back end specific - and not always used |
480 | . or updated. *} | |
252b5132 | 481 | . |
52b219b5 | 482 | . {* File position of section data. *} |
52b219b5 | 483 | . file_ptr filepos; |
252b5132 | 484 | . |
52b219b5 | 485 | . {* File position of relocation info. *} |
52b219b5 | 486 | . file_ptr rel_filepos; |
252b5132 | 487 | . |
52b219b5 | 488 | . {* File position of line data. *} |
52b219b5 | 489 | . file_ptr line_filepos; |
252b5132 | 490 | . |
52b219b5 | 491 | . {* Pointer to data for applications. *} |
c58b9523 | 492 | . void *userdata; |
252b5132 | 493 | . |
52b219b5 AM |
494 | . {* If the SEC_IN_MEMORY flag is set, this points to the actual |
495 | . contents. *} | |
496 | . unsigned char *contents; | |
252b5132 | 497 | . |
52b219b5 | 498 | . {* Attached line number information. *} |
52b219b5 | 499 | . alent *lineno; |
252b5132 | 500 | . |
52b219b5 | 501 | . {* Number of line number records. *} |
52b219b5 | 502 | . unsigned int lineno_count; |
252b5132 | 503 | . |
2dd439c5 | 504 | . {* Entity size for merging purposes. *} |
2dd439c5 L |
505 | . unsigned int entsize; |
506 | . | |
f97b9cb8 L |
507 | . {* Points to the kept section if this section is a link-once section, |
508 | . and is discarded. *} | |
198beae2 | 509 | . struct bfd_section *kept_section; |
f97b9cb8 | 510 | . |
52b219b5 AM |
511 | . {* When a section is being output, this value changes as more |
512 | . linenumbers are written out. *} | |
52b219b5 | 513 | . file_ptr moving_line_filepos; |
252b5132 | 514 | . |
52b219b5 | 515 | . {* What the section number is in the target world. *} |
52b219b5 | 516 | . int target_index; |
252b5132 | 517 | . |
c58b9523 | 518 | . void *used_by_bfd; |
252b5132 | 519 | . |
52b219b5 AM |
520 | . {* If this is a constructor section then here is a list of the |
521 | . relocations created to relocate items within it. *} | |
52b219b5 | 522 | . struct relent_chain *constructor_chain; |
252b5132 | 523 | . |
52b219b5 | 524 | . {* The BFD which owns the section. *} |
52b219b5 | 525 | . bfd *owner; |
252b5132 | 526 | . |
b5f79c76 | 527 | . {* A symbol which points at this section only. *} |
fc0a2244 AC |
528 | . struct bfd_symbol *symbol; |
529 | . struct bfd_symbol **symbol_ptr_ptr; | |
252b5132 | 530 | . |
8423293d AM |
531 | . {* Early in the link process, map_head and map_tail are used to build |
532 | . a list of input sections attached to an output section. Later, | |
533 | . output sections use these fields for a list of bfd_link_order | |
b7d07216 L |
534 | . structs. The linked_to_symbol_name field is for ELF assembler |
535 | . internal use. *} | |
8423293d AM |
536 | . union { |
537 | . struct bfd_link_order *link_order; | |
538 | . struct bfd_section *s; | |
b7d07216 | 539 | . const char *linked_to_symbol_name; |
8423293d | 540 | . } map_head, map_tail; |
cf53a97b AM |
541 | . |
542 | . {* Points to the output section this section is already assigned to, | |
543 | . if any. This is used when support for non-contiguous memory | |
544 | . regions is enabled. *} | |
545 | . struct bfd_section *already_assigned; | |
546 | . | |
547 | . {* Explicitly specified section type, if non-zero. *} | |
548 | . unsigned int type; | |
abf874aa | 549 | . |
b5f79c76 | 550 | .} asection; |
252b5132 | 551 | . |
a48931cc AM |
552 | .static inline const char * |
553 | .bfd_section_name (const asection *sec) | |
554 | .{ | |
555 | . return sec->name; | |
556 | .} | |
557 | . | |
558 | .static inline bfd_size_type | |
559 | .bfd_section_size (const asection *sec) | |
560 | .{ | |
561 | . return sec->size; | |
562 | .} | |
563 | . | |
564 | .static inline bfd_vma | |
565 | .bfd_section_vma (const asection *sec) | |
566 | .{ | |
567 | . return sec->vma; | |
568 | .} | |
569 | . | |
570 | .static inline bfd_vma | |
571 | .bfd_section_lma (const asection *sec) | |
572 | .{ | |
573 | . return sec->lma; | |
574 | .} | |
575 | . | |
576 | .static inline unsigned int | |
577 | .bfd_section_alignment (const asection *sec) | |
578 | .{ | |
579 | . return sec->alignment_power; | |
580 | .} | |
581 | . | |
582 | .static inline flagword | |
583 | .bfd_section_flags (const asection *sec) | |
584 | .{ | |
585 | . return sec->flags; | |
586 | .} | |
587 | . | |
588 | .static inline void * | |
589 | .bfd_section_userdata (const asection *sec) | |
590 | .{ | |
591 | . return sec->userdata; | |
592 | .} | |
0a1b45a2 | 593 | .static inline bool |
a48931cc AM |
594 | .bfd_is_com_section (const asection *sec) |
595 | .{ | |
596 | . return (sec->flags & SEC_IS_COMMON) != 0; | |
597 | .} | |
598 | . | |
27b829ee NC |
599 | .{* Note: the following are provided as inline functions rather than macros |
600 | . because not all callers use the return value. A macro implementation | |
601 | . would use a comma expression, eg: "((ptr)->foo = val, TRUE)" and some | |
602 | . compilers will complain about comma expressions that have no effect. *} | |
0a1b45a2 | 603 | .static inline bool |
fd361982 | 604 | .bfd_set_section_userdata (asection *sec, void *val) |
27b829ee | 605 | .{ |
fd361982 | 606 | . sec->userdata = val; |
0a1b45a2 | 607 | . return true; |
27b829ee NC |
608 | .} |
609 | . | |
0a1b45a2 | 610 | .static inline bool |
fd361982 | 611 | .bfd_set_section_vma (asection *sec, bfd_vma val) |
27b829ee | 612 | .{ |
fd361982 | 613 | . sec->vma = sec->lma = val; |
0a1b45a2 AM |
614 | . sec->user_set_vma = true; |
615 | . return true; | |
27b829ee NC |
616 | .} |
617 | . | |
0a1b45a2 | 618 | .static inline bool |
fd361982 | 619 | .bfd_set_section_lma (asection *sec, bfd_vma val) |
27b829ee | 620 | .{ |
fd361982 | 621 | . sec->lma = val; |
0a1b45a2 | 622 | . return true; |
fd361982 AM |
623 | .} |
624 | . | |
0a1b45a2 | 625 | .static inline bool |
fd361982 AM |
626 | .bfd_set_section_alignment (asection *sec, unsigned int val) |
627 | .{ | |
578a7392 AM |
628 | . if (val >= sizeof (bfd_vma) * 8 - 1) |
629 | . return false; | |
fd361982 | 630 | . sec->alignment_power = val; |
0a1b45a2 | 631 | . return true; |
27b829ee NC |
632 | .} |
633 | . | |
52b219b5 AM |
634 | .{* These sections are global, and are managed by BFD. The application |
635 | . and target back end are not permitted to change the values in | |
45dfa85a | 636 | . these sections. *} |
45a466b5 | 637 | .extern asection _bfd_std_section[4]; |
45dfa85a | 638 | . |
252b5132 RH |
639 | .#define BFD_ABS_SECTION_NAME "*ABS*" |
640 | .#define BFD_UND_SECTION_NAME "*UND*" | |
641 | .#define BFD_COM_SECTION_NAME "*COM*" | |
642 | .#define BFD_IND_SECTION_NAME "*IND*" | |
643 | . | |
b5f79c76 | 644 | .{* Pointer to the common section. *} |
45a466b5 | 645 | .#define bfd_com_section_ptr (&_bfd_std_section[0]) |
45dfa85a | 646 | .{* Pointer to the undefined section. *} |
45a466b5 | 647 | .#define bfd_und_section_ptr (&_bfd_std_section[1]) |
45dfa85a | 648 | .{* Pointer to the absolute section. *} |
45a466b5 | 649 | .#define bfd_abs_section_ptr (&_bfd_std_section[2]) |
b5f79c76 | 650 | .{* Pointer to the indirect section. *} |
45a466b5 | 651 | .#define bfd_ind_section_ptr (&_bfd_std_section[3]) |
45dfa85a | 652 | . |
0a1b45a2 | 653 | .static inline bool |
a48931cc AM |
654 | .bfd_is_und_section (const asection *sec) |
655 | .{ | |
656 | . return sec == bfd_und_section_ptr; | |
657 | .} | |
658 | . | |
0a1b45a2 | 659 | .static inline bool |
a48931cc AM |
660 | .bfd_is_abs_section (const asection *sec) |
661 | .{ | |
662 | . return sec == bfd_abs_section_ptr; | |
663 | .} | |
664 | . | |
0a1b45a2 | 665 | .static inline bool |
a48931cc AM |
666 | .bfd_is_ind_section (const asection *sec) |
667 | .{ | |
668 | . return sec == bfd_ind_section_ptr; | |
669 | .} | |
670 | . | |
0a1b45a2 | 671 | .static inline bool |
a48931cc AM |
672 | .bfd_is_const_section (const asection *sec) |
673 | .{ | |
18f97353 AM |
674 | . return (sec >= _bfd_std_section |
675 | . && sec < _bfd_std_section + (sizeof (_bfd_std_section) | |
676 | . / sizeof (_bfd_std_section[0]))); | |
a48931cc AM |
677 | .} |
678 | . | |
679 | .{* Return TRUE if input section SEC has been discarded. *} | |
0a1b45a2 | 680 | .static inline bool |
a48931cc AM |
681 | .discarded_section (const asection *sec) |
682 | .{ | |
683 | . return (!bfd_is_abs_section (sec) | |
684 | . && bfd_is_abs_section (sec->output_section) | |
685 | . && sec->sec_info_type != SEC_INFO_TYPE_MERGE | |
686 | . && sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS); | |
687 | .} | |
9e7b37b3 | 688 | . |
821e6ff6 | 689 | .#define BFD_FAKE_SECTION(SEC, SYM, NAME, IDX, FLAGS) \ |
57594b6a AM |
690 | . {* name, next, prev, id, section_id, index, flags, user_set_vma, *} \ |
691 | . { NAME, NULL, NULL, IDX, 0, 0, FLAGS, 0, \ | |
a4d8e49b | 692 | . \ |
48e81d7f | 693 | . {* linker_mark, linker_has_input, gc_mark, decompress_status, *} \ |
b0dddeec | 694 | . 0, 0, 1, 0, \ |
a4d8e49b | 695 | . \ |
48e81d7f | 696 | . {* segment_mark, sec_info_type, use_rela_p, *} \ |
4a114e3e | 697 | . 0, 0, 0, \ |
a4d8e49b | 698 | . \ |
48e81d7f | 699 | . {* sec_flg0, sec_flg1, sec_flg2, sec_flg3, sec_flg4, sec_flg5, *} \ |
b0dddeec | 700 | . 0, 0, 0, 0, 0, 0, \ |
a4d8e49b | 701 | . \ |
57594b6a | 702 | . {* vma, lma, size, rawsize, compressed_size, *} \ |
9751574e | 703 | . 0, 0, 0, 0, 0, \ |
a4d8e49b | 704 | . \ |
57594b6a AM |
705 | . {* output_offset, output_section, relocation, orelocation, *} \ |
706 | . 0, &SEC, NULL, NULL, \ | |
a4d8e49b | 707 | . \ |
57594b6a AM |
708 | . {* reloc_count, alignment_power, filepos, rel_filepos, *} \ |
709 | . 0, 0, 0, 0, \ | |
a4d8e49b | 710 | . \ |
48e81d7f | 711 | . {* line_filepos, userdata, contents, lineno, lineno_count, *} \ |
a4d8e49b L |
712 | . 0, NULL, NULL, NULL, 0, \ |
713 | . \ | |
48e81d7f AM |
714 | . {* entsize, kept_section, moving_line_filepos, *} \ |
715 | . 0, NULL, 0, \ | |
a4d8e49b | 716 | . \ |
48e81d7f | 717 | . {* target_index, used_by_bfd, constructor_chain, owner, *} \ |
a4d8e49b L |
718 | . 0, NULL, NULL, NULL, \ |
719 | . \ | |
b209b5a6 AM |
720 | . {* symbol, symbol_ptr_ptr, *} \ |
721 | . (struct bfd_symbol *) SYM, &SEC.symbol, \ | |
a4d8e49b | 722 | . \ |
c212f39d | 723 | . {* map_head, map_tail, already_assigned, type *} \ |
cf53a97b | 724 | . { NULL }, { NULL }, NULL, 0 \ |
abf874aa | 725 | . \ |
a4d8e49b L |
726 | . } |
727 | . | |
7eacd66b AM |
728 | .{* We use a macro to initialize the static asymbol structures because |
729 | . traditional C does not permit us to initialize a union member while | |
730 | . gcc warns if we don't initialize it. | |
731 | . the_bfd, name, value, attr, section [, udata] *} | |
732 | .#ifdef __STDC__ | |
733 | .#define GLOBAL_SYM_INIT(NAME, SECTION) \ | |
734 | . { 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 }} | |
735 | .#else | |
736 | .#define GLOBAL_SYM_INIT(NAME, SECTION) \ | |
737 | . { 0, NAME, 0, BSF_SECTION_SYM, SECTION } | |
738 | .#endif | |
739 | . | |
252b5132 RH |
740 | */ |
741 | ||
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) \ |
821e6ff6 | 754 | BFD_FAKE_SECTION(_bfd_std_section[IDX], &global_syms[IDX], NAME, IDX, FLAGS) |
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 | |
0a1b45a2 | 798 | bool |
f592407e | 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) | |
0a1b45a2 | 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; | |
0a1b45a2 | 811 | return true; |
f592407e AM |
812 | } |
813 | ||
7cf7fcc8 | 814 | unsigned int _bfd_section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */ |
6f20ed8a | 815 | |
f592407e AM |
816 | /* Initializes a new section. NEWSECT->NAME is already set. */ |
817 | ||
818 | static asection * | |
819 | bfd_section_init (bfd *abfd, asection *newsect) | |
820 | { | |
7cf7fcc8 | 821 | newsect->id = _bfd_section_id; |
f592407e AM |
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 | ||
7cf7fcc8 | 828 | _bfd_section_id++; |
73e87d70 | 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 | ||
427e4066 AB |
884 | if (name == NULL) |
885 | return NULL; | |
886 | ||
0a1b45a2 | 887 | sh = section_hash_lookup (&abfd->section_htab, name, false, false); |
73e87d70 AM |
888 | if (sh != NULL) |
889 | return &sh->section; | |
252b5132 | 890 | |
252b5132 RH |
891 | return NULL; |
892 | } | |
893 | ||
90061c33 AM |
894 | /* |
895 | FUNCTION | |
896 | bfd_get_next_section_by_name | |
897 | ||
898 | SYNOPSIS | |
199af150 | 899 | asection *bfd_get_next_section_by_name (bfd *ibfd, asection *sec); |
90061c33 AM |
900 | |
901 | DESCRIPTION | |
902 | Given @var{sec} is a section returned by @code{bfd_get_section_by_name}, | |
903 | return the next most recently created section attached to the same | |
199af150 AM |
904 | BFD with the same name, or if no such section exists in the same BFD and |
905 | IBFD is non-NULL, the next section with the same name in any input | |
906 | BFD following IBFD. Return NULL on finding no section. | |
90061c33 AM |
907 | */ |
908 | ||
909 | asection * | |
199af150 | 910 | bfd_get_next_section_by_name (bfd *ibfd, asection *sec) |
90061c33 AM |
911 | { |
912 | struct section_hash_entry *sh; | |
913 | const char *name; | |
914 | unsigned long hash; | |
915 | ||
916 | sh = ((struct section_hash_entry *) | |
917 | ((char *) sec - offsetof (struct section_hash_entry, section))); | |
918 | ||
919 | hash = sh->root.hash; | |
920 | name = sec->name; | |
921 | for (sh = (struct section_hash_entry *) sh->root.next; | |
922 | sh != NULL; | |
923 | sh = (struct section_hash_entry *) sh->root.next) | |
924 | if (sh->root.hash == hash | |
925 | && strcmp (sh->root.string, name) == 0) | |
926 | return &sh->section; | |
927 | ||
199af150 AM |
928 | if (ibfd != NULL) |
929 | { | |
930 | while ((ibfd = ibfd->link.next) != NULL) | |
931 | { | |
932 | asection *s = bfd_get_section_by_name (ibfd, name); | |
933 | if (s != NULL) | |
934 | return s; | |
935 | } | |
936 | } | |
937 | ||
90061c33 AM |
938 | return NULL; |
939 | } | |
940 | ||
3d4d4302 AM |
941 | /* |
942 | FUNCTION | |
943 | bfd_get_linker_section | |
944 | ||
945 | SYNOPSIS | |
946 | asection *bfd_get_linker_section (bfd *abfd, const char *name); | |
947 | ||
948 | DESCRIPTION | |
949 | Return the linker created section attached to @var{abfd} | |
950 | named @var{name}. Return NULL if no such section exists. | |
951 | */ | |
952 | ||
953 | asection * | |
954 | bfd_get_linker_section (bfd *abfd, const char *name) | |
955 | { | |
956 | asection *sec = bfd_get_section_by_name (abfd, name); | |
957 | ||
958 | while (sec != NULL && (sec->flags & SEC_LINKER_CREATED) == 0) | |
199af150 | 959 | sec = bfd_get_next_section_by_name (NULL, sec); |
3d4d4302 AM |
960 | return sec; |
961 | } | |
962 | ||
fafe6678 L |
963 | /* |
964 | FUNCTION | |
965 | bfd_get_section_by_name_if | |
966 | ||
967 | SYNOPSIS | |
968 | asection *bfd_get_section_by_name_if | |
969 | (bfd *abfd, | |
970 | const char *name, | |
0a1b45a2 | 971 | bool (*func) (bfd *abfd, asection *sect, void *obj), |
fafe6678 L |
972 | void *obj); |
973 | ||
974 | DESCRIPTION | |
975 | Call the provided function @var{func} for each section | |
976 | attached to the BFD @var{abfd} whose name matches @var{name}, | |
977 | passing @var{obj} as an argument. The function will be called | |
978 | as if by | |
979 | ||
980 | | func (abfd, the_section, obj); | |
981 | ||
982 | It returns the first section for which @var{func} returns true, | |
983 | otherwise <<NULL>>. | |
984 | ||
985 | */ | |
986 | ||
987 | asection * | |
988 | bfd_get_section_by_name_if (bfd *abfd, const char *name, | |
0a1b45a2 | 989 | bool (*operation) (bfd *, asection *, void *), |
fafe6678 L |
990 | void *user_storage) |
991 | { | |
992 | struct section_hash_entry *sh; | |
993 | unsigned long hash; | |
994 | ||
427e4066 AB |
995 | if (name == NULL) |
996 | return NULL; | |
997 | ||
0a1b45a2 | 998 | sh = section_hash_lookup (&abfd->section_htab, name, false, false); |
fafe6678 L |
999 | if (sh == NULL) |
1000 | return NULL; | |
1001 | ||
1002 | hash = sh->root.hash; | |
2fb9328d AM |
1003 | for (; sh != NULL; sh = (struct section_hash_entry *) sh->root.next) |
1004 | if (sh->root.hash == hash | |
1005 | && strcmp (sh->root.string, name) == 0 | |
1006 | && (*operation) (abfd, &sh->section, user_storage)) | |
1007 | return &sh->section; | |
fafe6678 L |
1008 | |
1009 | return NULL; | |
1010 | } | |
1011 | ||
1bd91689 AM |
1012 | /* |
1013 | FUNCTION | |
1014 | bfd_get_unique_section_name | |
1015 | ||
1016 | SYNOPSIS | |
c58b9523 AM |
1017 | char *bfd_get_unique_section_name |
1018 | (bfd *abfd, const char *templat, int *count); | |
1bd91689 AM |
1019 | |
1020 | DESCRIPTION | |
1021 | Invent a section name that is unique in @var{abfd} by tacking | |
77cb06e9 AM |
1022 | a dot and a digit suffix onto the original @var{templat}. If |
1023 | @var{count} is non-NULL, then it specifies the first number | |
1024 | tried as a suffix to generate a unique name. The value | |
1025 | pointed to by @var{count} will be incremented in this case. | |
1bd91689 AM |
1026 | */ |
1027 | ||
1028 | char * | |
c58b9523 | 1029 | bfd_get_unique_section_name (bfd *abfd, const char *templat, int *count) |
1bd91689 AM |
1030 | { |
1031 | int num; | |
1032 | unsigned int len; | |
1033 | char *sname; | |
1034 | ||
a966dba9 | 1035 | len = strlen (templat); |
a50b1753 | 1036 | sname = (char *) bfd_malloc (len + 8); |
b3ea3584 AM |
1037 | if (sname == NULL) |
1038 | return NULL; | |
d4c88bbb | 1039 | memcpy (sname, templat, len); |
1bd91689 AM |
1040 | num = 1; |
1041 | if (count != NULL) | |
1042 | num = *count; | |
1043 | ||
1044 | do | |
1045 | { | |
1046 | /* If we have a million sections, something is badly wrong. */ | |
1047 | if (num > 999999) | |
1048 | abort (); | |
77cb06e9 | 1049 | sprintf (sname + len, ".%d", num++); |
1bd91689 | 1050 | } |
0a1b45a2 | 1051 | while (section_hash_lookup (&abfd->section_htab, sname, false, false)); |
1bd91689 AM |
1052 | |
1053 | if (count != NULL) | |
1054 | *count = num; | |
1055 | return sname; | |
1056 | } | |
1057 | ||
252b5132 RH |
1058 | /* |
1059 | FUNCTION | |
1060 | bfd_make_section_old_way | |
1061 | ||
1062 | SYNOPSIS | |
c58b9523 | 1063 | asection *bfd_make_section_old_way (bfd *abfd, const char *name); |
252b5132 RH |
1064 | |
1065 | DESCRIPTION | |
1066 | Create a new empty section called @var{name} | |
1067 | and attach it to the end of the chain of sections for the | |
1068 | BFD @var{abfd}. An attempt to create a section with a name which | |
1069 | is already in use returns its pointer without changing the | |
1070 | section chain. | |
1071 | ||
1072 | It has the funny name since this is the way it used to be | |
1073 | before it was rewritten.... | |
1074 | ||
1075 | Possible errors are: | |
1076 | o <<bfd_error_invalid_operation>> - | |
1077 | If output has already started for this BFD. | |
1078 | o <<bfd_error_no_memory>> - | |
1079 | If memory allocation fails. | |
1080 | ||
1081 | */ | |
1082 | ||
252b5132 | 1083 | asection * |
c58b9523 | 1084 | bfd_make_section_old_way (bfd *abfd, const char *name) |
252b5132 | 1085 | { |
73e87d70 AM |
1086 | asection *newsect; |
1087 | ||
1088 | if (abfd->output_has_begun) | |
1089 | { | |
1090 | bfd_set_error (bfd_error_invalid_operation); | |
1091 | return NULL; | |
1092 | } | |
1093 | ||
1094 | if (strcmp (name, BFD_ABS_SECTION_NAME) == 0) | |
f592407e AM |
1095 | newsect = bfd_abs_section_ptr; |
1096 | else if (strcmp (name, BFD_COM_SECTION_NAME) == 0) | |
1097 | newsect = bfd_com_section_ptr; | |
1098 | else if (strcmp (name, BFD_UND_SECTION_NAME) == 0) | |
1099 | newsect = bfd_und_section_ptr; | |
1100 | else if (strcmp (name, BFD_IND_SECTION_NAME) == 0) | |
1101 | newsect = bfd_ind_section_ptr; | |
1102 | else | |
1103 | { | |
1104 | struct section_hash_entry *sh; | |
73e87d70 | 1105 | |
0a1b45a2 | 1106 | sh = section_hash_lookup (&abfd->section_htab, name, true, false); |
f592407e AM |
1107 | if (sh == NULL) |
1108 | return NULL; | |
73e87d70 | 1109 | |
f592407e AM |
1110 | newsect = &sh->section; |
1111 | if (newsect->name != NULL) | |
1112 | { | |
1113 | /* Section already exists. */ | |
1114 | return newsect; | |
1115 | } | |
73e87d70 | 1116 | |
f592407e AM |
1117 | newsect->name = name; |
1118 | return bfd_section_init (abfd, newsect); | |
252b5132 | 1119 | } |
73e87d70 | 1120 | |
f592407e AM |
1121 | /* Call new_section_hook when "creating" the standard abs, com, und |
1122 | and ind sections to tack on format specific section data. | |
1123 | Also, create a proper section symbol. */ | |
1124 | if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect))) | |
1125 | return NULL; | |
1126 | return newsect; | |
252b5132 RH |
1127 | } |
1128 | ||
1129 | /* | |
1130 | FUNCTION | |
3496cb2a | 1131 | bfd_make_section_anyway_with_flags |
252b5132 RH |
1132 | |
1133 | SYNOPSIS | |
3496cb2a L |
1134 | asection *bfd_make_section_anyway_with_flags |
1135 | (bfd *abfd, const char *name, flagword flags); | |
252b5132 RH |
1136 | |
1137 | DESCRIPTION | |
1138 | Create a new empty section called @var{name} and attach it to the end of | |
1139 | the chain of sections for @var{abfd}. Create a new section even if there | |
3496cb2a L |
1140 | is already a section with that name. Also set the attributes of the |
1141 | new section to the value @var{flags}. | |
252b5132 RH |
1142 | |
1143 | Return <<NULL>> and set <<bfd_error>> on error; possible errors are: | |
1144 | o <<bfd_error_invalid_operation>> - If output has already started for @var{abfd}. | |
1145 | o <<bfd_error_no_memory>> - If memory allocation fails. | |
1146 | */ | |
1147 | ||
1148 | sec_ptr | |
3496cb2a L |
1149 | bfd_make_section_anyway_with_flags (bfd *abfd, const char *name, |
1150 | flagword flags) | |
252b5132 | 1151 | { |
73e87d70 | 1152 | struct section_hash_entry *sh; |
252b5132 | 1153 | asection *newsect; |
252b5132 RH |
1154 | |
1155 | if (abfd->output_has_begun) | |
1156 | { | |
1157 | bfd_set_error (bfd_error_invalid_operation); | |
1158 | return NULL; | |
1159 | } | |
1160 | ||
0a1b45a2 | 1161 | sh = section_hash_lookup (&abfd->section_htab, name, true, false); |
73e87d70 | 1162 | if (sh == NULL) |
252b5132 RH |
1163 | return NULL; |
1164 | ||
73e87d70 AM |
1165 | newsect = &sh->section; |
1166 | if (newsect->name != NULL) | |
4d7ce4dd | 1167 | { |
72adc230 AM |
1168 | /* We are making a section of the same name. Put it in the |
1169 | section hash table. Even though we can't find it directly by a | |
1170 | hash lookup, we'll be able to find the section by traversing | |
1171 | sh->root.next quicker than looking at all the bfd sections. */ | |
1172 | struct section_hash_entry *new_sh; | |
1173 | new_sh = (struct section_hash_entry *) | |
1174 | bfd_section_hash_newfunc (NULL, &abfd->section_htab, name); | |
1175 | if (new_sh == NULL) | |
73e87d70 | 1176 | return NULL; |
72adc230 | 1177 | |
73499ab8 | 1178 | new_sh->root = sh->root; |
72adc230 AM |
1179 | sh->root.next = &new_sh->root; |
1180 | newsect = &new_sh->section; | |
252b5132 RH |
1181 | } |
1182 | ||
3496cb2a | 1183 | newsect->flags = flags; |
73e87d70 AM |
1184 | newsect->name = name; |
1185 | return bfd_section_init (abfd, newsect); | |
252b5132 RH |
1186 | } |
1187 | ||
1188 | /* | |
1189 | FUNCTION | |
3496cb2a | 1190 | bfd_make_section_anyway |
252b5132 RH |
1191 | |
1192 | SYNOPSIS | |
3496cb2a L |
1193 | asection *bfd_make_section_anyway (bfd *abfd, const char *name); |
1194 | ||
1195 | DESCRIPTION | |
1196 | Create a new empty section called @var{name} and attach it to the end of | |
1197 | the chain of sections for @var{abfd}. Create a new section even if there | |
1198 | is already a section with that name. | |
1199 | ||
1200 | Return <<NULL>> and set <<bfd_error>> on error; possible errors are: | |
1201 | o <<bfd_error_invalid_operation>> - If output has already started for @var{abfd}. | |
1202 | o <<bfd_error_no_memory>> - If memory allocation fails. | |
1203 | */ | |
1204 | ||
1205 | sec_ptr | |
1206 | bfd_make_section_anyway (bfd *abfd, const char *name) | |
1207 | { | |
1208 | return bfd_make_section_anyway_with_flags (abfd, name, 0); | |
1209 | } | |
1210 | ||
1211 | /* | |
1212 | FUNCTION | |
1213 | bfd_make_section_with_flags | |
1214 | ||
1215 | SYNOPSIS | |
1216 | asection *bfd_make_section_with_flags | |
1217 | (bfd *, const char *name, flagword flags); | |
252b5132 RH |
1218 | |
1219 | DESCRIPTION | |
1220 | Like <<bfd_make_section_anyway>>, but return <<NULL>> (without calling | |
1221 | bfd_set_error ()) without changing the section chain if there is already a | |
3496cb2a L |
1222 | section named @var{name}. Also set the attributes of the new section to |
1223 | the value @var{flags}. If there is an error, return <<NULL>> and set | |
252b5132 RH |
1224 | <<bfd_error>>. |
1225 | */ | |
1226 | ||
1227 | asection * | |
3496cb2a L |
1228 | bfd_make_section_with_flags (bfd *abfd, const char *name, |
1229 | flagword flags) | |
252b5132 | 1230 | { |
73e87d70 AM |
1231 | struct section_hash_entry *sh; |
1232 | asection *newsect; | |
252b5132 | 1233 | |
8bdf0be1 | 1234 | if (abfd == NULL || name == NULL || abfd->output_has_begun) |
252b5132 | 1235 | { |
73e87d70 AM |
1236 | bfd_set_error (bfd_error_invalid_operation); |
1237 | return NULL; | |
252b5132 RH |
1238 | } |
1239 | ||
73e87d70 AM |
1240 | if (strcmp (name, BFD_ABS_SECTION_NAME) == 0 |
1241 | || strcmp (name, BFD_COM_SECTION_NAME) == 0 | |
1242 | || strcmp (name, BFD_UND_SECTION_NAME) == 0 | |
1243 | || strcmp (name, BFD_IND_SECTION_NAME) == 0) | |
1244 | return NULL; | |
252b5132 | 1245 | |
0a1b45a2 | 1246 | sh = section_hash_lookup (&abfd->section_htab, name, true, false); |
73e87d70 AM |
1247 | if (sh == NULL) |
1248 | return NULL; | |
1249 | ||
1250 | newsect = &sh->section; | |
1251 | if (newsect->name != NULL) | |
252b5132 | 1252 | { |
73e87d70 | 1253 | /* Section already exists. */ |
003d627e | 1254 | return NULL; |
252b5132 RH |
1255 | } |
1256 | ||
73e87d70 | 1257 | newsect->name = name; |
3496cb2a | 1258 | newsect->flags = flags; |
73e87d70 | 1259 | return bfd_section_init (abfd, newsect); |
252b5132 RH |
1260 | } |
1261 | ||
3496cb2a L |
1262 | /* |
1263 | FUNCTION | |
1264 | bfd_make_section | |
1265 | ||
1266 | SYNOPSIS | |
1267 | asection *bfd_make_section (bfd *, const char *name); | |
1268 | ||
1269 | DESCRIPTION | |
1270 | Like <<bfd_make_section_anyway>>, but return <<NULL>> (without calling | |
1271 | bfd_set_error ()) without changing the section chain if there is already a | |
1272 | section named @var{name}. If there is an error, return <<NULL>> and set | |
1273 | <<bfd_error>>. | |
1274 | */ | |
1275 | ||
1276 | asection * | |
1277 | bfd_make_section (bfd *abfd, const char *name) | |
1278 | { | |
1279 | return bfd_make_section_with_flags (abfd, name, 0); | |
1280 | } | |
1281 | ||
252b5132 RH |
1282 | /* |
1283 | FUNCTION | |
1284 | bfd_set_section_flags | |
1285 | ||
1286 | SYNOPSIS | |
0a1b45a2 | 1287 | bool bfd_set_section_flags (asection *sec, flagword flags); |
252b5132 RH |
1288 | |
1289 | DESCRIPTION | |
fd361982 AM |
1290 | Set the attributes of the section @var{sec} to the value @var{flags}. |
1291 | Return <<TRUE>> on success, <<FALSE>> on error. Possible error | |
1292 | returns are: | |
252b5132 RH |
1293 | |
1294 | o <<bfd_error_invalid_operation>> - | |
1295 | The section cannot have one or more of the attributes | |
1296 | requested. For example, a .bss section in <<a.out>> may not | |
1297 | have the <<SEC_HAS_CONTENTS>> field set. | |
1298 | ||
1299 | */ | |
1300 | ||
0a1b45a2 | 1301 | bool |
fd361982 | 1302 | bfd_set_section_flags (asection *section, flagword flags) |
252b5132 | 1303 | { |
252b5132 | 1304 | section->flags = flags; |
0a1b45a2 | 1305 | return true; |
252b5132 RH |
1306 | } |
1307 | ||
4e011fb5 AM |
1308 | /* |
1309 | FUNCTION | |
1310 | bfd_rename_section | |
1311 | ||
1312 | SYNOPSIS | |
1313 | void bfd_rename_section | |
fd361982 | 1314 | (asection *sec, const char *newname); |
4e011fb5 AM |
1315 | |
1316 | DESCRIPTION | |
fd361982 | 1317 | Rename section @var{sec} to @var{newname}. |
4e011fb5 AM |
1318 | */ |
1319 | ||
1320 | void | |
fd361982 | 1321 | bfd_rename_section (asection *sec, const char *newname) |
4e011fb5 AM |
1322 | { |
1323 | struct section_hash_entry *sh; | |
1324 | ||
1325 | sh = (struct section_hash_entry *) | |
1326 | ((char *) sec - offsetof (struct section_hash_entry, section)); | |
1327 | sh->section.name = newname; | |
fd361982 | 1328 | bfd_hash_rename (&sec->owner->section_htab, newname, &sh->root); |
4e011fb5 AM |
1329 | } |
1330 | ||
252b5132 RH |
1331 | /* |
1332 | FUNCTION | |
1333 | bfd_map_over_sections | |
1334 | ||
1335 | SYNOPSIS | |
c58b9523 AM |
1336 | void bfd_map_over_sections |
1337 | (bfd *abfd, | |
1338 | void (*func) (bfd *abfd, asection *sect, void *obj), | |
1339 | void *obj); | |
252b5132 RH |
1340 | |
1341 | DESCRIPTION | |
1342 | Call the provided function @var{func} for each section | |
1343 | attached to the BFD @var{abfd}, passing @var{obj} as an | |
1344 | argument. The function will be called as if by | |
1345 | ||
c58b9523 | 1346 | | func (abfd, the_section, obj); |
252b5132 | 1347 | |
7dee875e | 1348 | This is the preferred method for iterating over sections; an |
252b5132 RH |
1349 | alternative would be to use a loop: |
1350 | ||
c06fc9eb | 1351 | | asection *p; |
252b5132 | 1352 | | for (p = abfd->sections; p != NULL; p = p->next) |
c58b9523 | 1353 | | func (abfd, p, ...) |
252b5132 | 1354 | |
252b5132 RH |
1355 | */ |
1356 | ||
252b5132 | 1357 | void |
c58b9523 AM |
1358 | bfd_map_over_sections (bfd *abfd, |
1359 | void (*operation) (bfd *, asection *, void *), | |
1360 | void *user_storage) | |
252b5132 RH |
1361 | { |
1362 | asection *sect; | |
1363 | unsigned int i = 0; | |
1364 | ||
1365 | for (sect = abfd->sections; sect != NULL; i++, sect = sect->next) | |
1366 | (*operation) (abfd, sect, user_storage); | |
1367 | ||
1368 | if (i != abfd->section_count) /* Debugging */ | |
1369 | abort (); | |
1370 | } | |
1371 | ||
bc87dd2e L |
1372 | /* |
1373 | FUNCTION | |
1374 | bfd_sections_find_if | |
1375 | ||
1376 | SYNOPSIS | |
1377 | asection *bfd_sections_find_if | |
1378 | (bfd *abfd, | |
0a1b45a2 | 1379 | bool (*operation) (bfd *abfd, asection *sect, void *obj), |
bc87dd2e L |
1380 | void *obj); |
1381 | ||
1382 | DESCRIPTION | |
f4eae89c | 1383 | Call the provided function @var{operation} for each section |
bc87dd2e L |
1384 | attached to the BFD @var{abfd}, passing @var{obj} as an |
1385 | argument. The function will be called as if by | |
1386 | ||
f4eae89c | 1387 | | operation (abfd, the_section, obj); |
bc87dd2e | 1388 | |
f4eae89c | 1389 | It returns the first section for which @var{operation} returns true. |
bc87dd2e L |
1390 | |
1391 | */ | |
1392 | ||
1393 | asection * | |
1394 | bfd_sections_find_if (bfd *abfd, | |
0a1b45a2 | 1395 | bool (*operation) (bfd *, asection *, void *), |
bc87dd2e L |
1396 | void *user_storage) |
1397 | { | |
1398 | asection *sect; | |
1399 | ||
1400 | for (sect = abfd->sections; sect != NULL; sect = sect->next) | |
1401 | if ((*operation) (abfd, sect, user_storage)) | |
1402 | break; | |
1403 | ||
1404 | return sect; | |
1405 | } | |
1406 | ||
252b5132 RH |
1407 | /* |
1408 | FUNCTION | |
1409 | bfd_set_section_size | |
1410 | ||
1411 | SYNOPSIS | |
0a1b45a2 | 1412 | bool bfd_set_section_size (asection *sec, bfd_size_type val); |
252b5132 RH |
1413 | |
1414 | DESCRIPTION | |
1415 | Set @var{sec} to the size @var{val}. If the operation is | |
b34976b6 | 1416 | ok, then <<TRUE>> is returned, else <<FALSE>>. |
252b5132 RH |
1417 | |
1418 | Possible error returns: | |
1419 | o <<bfd_error_invalid_operation>> - | |
1420 | Writing has started to the BFD, so setting the size is invalid. | |
1421 | ||
1422 | */ | |
1423 | ||
0a1b45a2 | 1424 | bool |
fd361982 | 1425 | bfd_set_section_size (asection *sec, bfd_size_type val) |
252b5132 RH |
1426 | { |
1427 | /* Once you've started writing to any section you cannot create or change | |
7b82c249 | 1428 | the size of any others. */ |
252b5132 | 1429 | |
fd361982 | 1430 | if (sec->owner == NULL || sec->owner->output_has_begun) |
252b5132 RH |
1431 | { |
1432 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 1433 | return false; |
252b5132 RH |
1434 | } |
1435 | ||
fd361982 | 1436 | sec->size = val; |
0a1b45a2 | 1437 | return true; |
252b5132 RH |
1438 | } |
1439 | ||
1440 | /* | |
1441 | FUNCTION | |
1442 | bfd_set_section_contents | |
1443 | ||
1444 | SYNOPSIS | |
0a1b45a2 | 1445 | bool bfd_set_section_contents |
85302095 AC |
1446 | (bfd *abfd, asection *section, const void *data, |
1447 | file_ptr offset, bfd_size_type count); | |
252b5132 | 1448 | |
252b5132 RH |
1449 | DESCRIPTION |
1450 | Sets the contents of the section @var{section} in BFD | |
c8d3f932 MW |
1451 | @var{abfd} to the data starting in memory at @var{location}. |
1452 | The data is written to the output section starting at offset | |
9a968f43 | 1453 | @var{offset} for @var{count} octets. |
252b5132 | 1454 | |
c8d3f932 MW |
1455 | Normally <<TRUE>> is returned, but <<FALSE>> is returned if |
1456 | there was an error. Possible error returns are: | |
252b5132 RH |
1457 | o <<bfd_error_no_contents>> - |
1458 | The output section does not have the <<SEC_HAS_CONTENTS>> | |
1459 | attribute, so nothing can be written to it. | |
c8d3f932 MW |
1460 | o <<bfd_error_bad_value>> - |
1461 | The section is unable to contain all of the data. | |
1462 | o <<bfd_error_invalid_operation>> - | |
1463 | The BFD is not writeable. | |
1464 | o and some more too. | |
252b5132 RH |
1465 | |
1466 | This routine is front end to the back end function | |
1467 | <<_bfd_set_section_contents>>. | |
1468 | ||
252b5132 RH |
1469 | */ |
1470 | ||
0a1b45a2 | 1471 | bool |
c58b9523 AM |
1472 | bfd_set_section_contents (bfd *abfd, |
1473 | sec_ptr section, | |
85302095 | 1474 | const void *location, |
c58b9523 AM |
1475 | file_ptr offset, |
1476 | bfd_size_type count) | |
252b5132 RH |
1477 | { |
1478 | bfd_size_type sz; | |
1479 | ||
fd361982 | 1480 | if (!(bfd_section_flags (section) & SEC_HAS_CONTENTS)) |
252b5132 RH |
1481 | { |
1482 | bfd_set_error (bfd_error_no_contents); | |
0a1b45a2 | 1483 | return false; |
252b5132 RH |
1484 | } |
1485 | ||
eea6121a | 1486 | sz = section->size; |
dc810e39 | 1487 | if ((bfd_size_type) offset > sz |
6db658c5 | 1488 | || count > sz - offset |
dc810e39 | 1489 | || count != (size_t) count) |
252b5132 | 1490 | { |
252b5132 | 1491 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 1492 | return false; |
252b5132 | 1493 | } |
252b5132 | 1494 | |
26ae6d5e | 1495 | if (!bfd_write_p (abfd)) |
252b5132 | 1496 | { |
252b5132 | 1497 | bfd_set_error (bfd_error_invalid_operation); |
0a1b45a2 | 1498 | return false; |
252b5132 RH |
1499 | } |
1500 | ||
9a951beb RH |
1501 | /* Record a copy of the data in memory if desired. */ |
1502 | if (section->contents | |
c58b9523 | 1503 | && location != section->contents + offset) |
dc810e39 | 1504 | memcpy (section->contents + offset, location, (size_t) count); |
9a951beb | 1505 | |
252b5132 RH |
1506 | if (BFD_SEND (abfd, _bfd_set_section_contents, |
1507 | (abfd, section, location, offset, count))) | |
1508 | { | |
0a1b45a2 AM |
1509 | abfd->output_has_begun = true; |
1510 | return true; | |
252b5132 RH |
1511 | } |
1512 | ||
0a1b45a2 | 1513 | return false; |
252b5132 RH |
1514 | } |
1515 | ||
1516 | /* | |
1517 | FUNCTION | |
1518 | bfd_get_section_contents | |
1519 | ||
1520 | SYNOPSIS | |
0a1b45a2 | 1521 | bool bfd_get_section_contents |
c58b9523 AM |
1522 | (bfd *abfd, asection *section, void *location, file_ptr offset, |
1523 | bfd_size_type count); | |
252b5132 RH |
1524 | |
1525 | DESCRIPTION | |
1526 | Read data from @var{section} in BFD @var{abfd} | |
1527 | into memory starting at @var{location}. The data is read at an | |
1528 | offset of @var{offset} from the start of the input section, | |
1529 | and is read for @var{count} bytes. | |
1530 | ||
1531 | If the contents of a constructor with the <<SEC_CONSTRUCTOR>> | |
1532 | flag set are requested or if the section does not have the | |
1533 | <<SEC_HAS_CONTENTS>> flag set, then the @var{location} is filled | |
b34976b6 AM |
1534 | with zeroes. If no errors occur, <<TRUE>> is returned, else |
1535 | <<FALSE>>. | |
252b5132 | 1536 | |
252b5132 | 1537 | */ |
0a1b45a2 | 1538 | bool |
c58b9523 AM |
1539 | bfd_get_section_contents (bfd *abfd, |
1540 | sec_ptr section, | |
1541 | void *location, | |
1542 | file_ptr offset, | |
1543 | bfd_size_type count) | |
252b5132 RH |
1544 | { |
1545 | bfd_size_type sz; | |
1546 | ||
1547 | if (section->flags & SEC_CONSTRUCTOR) | |
1548 | { | |
dc810e39 | 1549 | memset (location, 0, (size_t) count); |
0a1b45a2 | 1550 | return true; |
252b5132 RH |
1551 | } |
1552 | ||
20d8836e | 1553 | sz = bfd_get_section_limit_octets (abfd, section); |
dc810e39 | 1554 | if ((bfd_size_type) offset > sz |
6db658c5 | 1555 | || count > sz - offset |
dc810e39 | 1556 | || count != (size_t) count) |
252b5132 | 1557 | { |
252b5132 | 1558 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 1559 | return false; |
252b5132 | 1560 | } |
252b5132 RH |
1561 | |
1562 | if (count == 0) | |
1563 | /* Don't bother. */ | |
0a1b45a2 | 1564 | return true; |
252b5132 RH |
1565 | |
1566 | if ((section->flags & SEC_HAS_CONTENTS) == 0) | |
1567 | { | |
dc810e39 | 1568 | memset (location, 0, (size_t) count); |
0a1b45a2 | 1569 | return true; |
252b5132 RH |
1570 | } |
1571 | ||
1572 | if ((section->flags & SEC_IN_MEMORY) != 0) | |
1573 | { | |
ea882e87 NC |
1574 | if (section->contents == NULL) |
1575 | { | |
1576 | /* This can happen because of errors earlier on in the linking process. | |
1577 | We do not want to seg-fault here, so clear the flag and return an | |
1578 | error code. */ | |
1579 | section->flags &= ~ SEC_IN_MEMORY; | |
1580 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 1581 | return false; |
ea882e87 | 1582 | } |
68ffbac6 | 1583 | |
ddda4adc | 1584 | memmove (location, section->contents + offset, (size_t) count); |
0a1b45a2 | 1585 | return true; |
252b5132 RH |
1586 | } |
1587 | ||
1588 | return BFD_SEND (abfd, _bfd_get_section_contents, | |
1589 | (abfd, section, location, offset, count)); | |
1590 | } | |
1591 | ||
eea6121a AM |
1592 | /* |
1593 | FUNCTION | |
1594 | bfd_malloc_and_get_section | |
1595 | ||
1596 | SYNOPSIS | |
0a1b45a2 | 1597 | bool bfd_malloc_and_get_section |
eea6121a AM |
1598 | (bfd *abfd, asection *section, bfd_byte **buf); |
1599 | ||
1600 | DESCRIPTION | |
1601 | Read all data from @var{section} in BFD @var{abfd} | |
1602 | into a buffer, *@var{buf}, malloc'd by this function. | |
1603 | */ | |
1604 | ||
0a1b45a2 | 1605 | bool |
eea6121a AM |
1606 | bfd_malloc_and_get_section (bfd *abfd, sec_ptr sec, bfd_byte **buf) |
1607 | { | |
4a114e3e L |
1608 | *buf = NULL; |
1609 | return bfd_get_full_section_contents (abfd, sec, buf); | |
eea6121a | 1610 | } |
252b5132 RH |
1611 | /* |
1612 | FUNCTION | |
1613 | bfd_copy_private_section_data | |
1614 | ||
1615 | SYNOPSIS | |
0a1b45a2 | 1616 | bool bfd_copy_private_section_data |
c58b9523 | 1617 | (bfd *ibfd, asection *isec, bfd *obfd, asection *osec); |
252b5132 RH |
1618 | |
1619 | DESCRIPTION | |
1620 | Copy private section information from @var{isec} in the BFD | |
1621 | @var{ibfd} to the section @var{osec} in the BFD @var{obfd}. | |
b34976b6 | 1622 | Return <<TRUE>> on success, <<FALSE>> on error. Possible error |
252b5132 RH |
1623 | returns are: |
1624 | ||
1625 | o <<bfd_error_no_memory>> - | |
1626 | Not enough memory exists to create private data for @var{osec}. | |
1627 | ||
1628 | .#define bfd_copy_private_section_data(ibfd, isection, obfd, osection) \ | |
07d6d2b8 AM |
1629 | . BFD_SEND (obfd, _bfd_copy_private_section_data, \ |
1630 | . (ibfd, isection, obfd, osection)) | |
252b5132 RH |
1631 | */ |
1632 | ||
72adc230 AM |
1633 | /* |
1634 | FUNCTION | |
1635 | bfd_generic_is_group_section | |
1636 | ||
1637 | SYNOPSIS | |
0a1b45a2 | 1638 | bool bfd_generic_is_group_section (bfd *, const asection *sec); |
72adc230 AM |
1639 | |
1640 | DESCRIPTION | |
1641 | Returns TRUE if @var{sec} is a member of a group. | |
1642 | */ | |
1643 | ||
0a1b45a2 | 1644 | bool |
72adc230 AM |
1645 | bfd_generic_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, |
1646 | const asection *sec ATTRIBUTE_UNUSED) | |
1647 | { | |
0a1b45a2 | 1648 | return false; |
72adc230 AM |
1649 | } |
1650 | ||
cb7f4b29 AM |
1651 | /* |
1652 | FUNCTION | |
1653 | bfd_generic_group_name | |
1654 | ||
1655 | SYNOPSIS | |
1656 | const char *bfd_generic_group_name (bfd *, const asection *sec); | |
1657 | ||
1658 | DESCRIPTION | |
1659 | Returns group name if @var{sec} is a member of a group. | |
1660 | */ | |
1661 | ||
1662 | const char * | |
1663 | bfd_generic_group_name (bfd *abfd ATTRIBUTE_UNUSED, | |
1664 | const asection *sec ATTRIBUTE_UNUSED) | |
1665 | { | |
1666 | return NULL; | |
1667 | } | |
1668 | ||
b885599b AM |
1669 | /* |
1670 | FUNCTION | |
e61463e1 | 1671 | bfd_generic_discard_group |
b885599b AM |
1672 | |
1673 | SYNOPSIS | |
0a1b45a2 | 1674 | bool bfd_generic_discard_group (bfd *abfd, asection *group); |
b885599b AM |
1675 | |
1676 | DESCRIPTION | |
1677 | Remove all members of @var{group} from the output. | |
1678 | */ | |
1679 | ||
0a1b45a2 | 1680 | bool |
c58b9523 AM |
1681 | bfd_generic_discard_group (bfd *abfd ATTRIBUTE_UNUSED, |
1682 | asection *group ATTRIBUTE_UNUSED) | |
b885599b | 1683 | { |
0a1b45a2 | 1684 | return true; |
b885599b | 1685 | } |
d00dd7dc | 1686 | |
0a1b45a2 | 1687 | bool |
d00dd7dc AM |
1688 | _bfd_nowrite_set_section_contents (bfd *abfd, |
1689 | sec_ptr section ATTRIBUTE_UNUSED, | |
1690 | const void *location ATTRIBUTE_UNUSED, | |
1691 | file_ptr offset ATTRIBUTE_UNUSED, | |
1692 | bfd_size_type count ATTRIBUTE_UNUSED) | |
1693 | { | |
1694 | return _bfd_bool_bfd_false_error (abfd); | |
1695 | } | |
f7502dfe AM |
1696 | |
1697 | /* | |
1698 | INTERNAL_FUNCTION | |
1699 | _bfd_section_size_insane | |
1700 | ||
1701 | SYNOPSIS | |
1702 | bool _bfd_section_size_insane (bfd *abfd, asection *sec); | |
1703 | ||
1704 | DESCRIPTION | |
1705 | Returns true if the given section has a size that indicates | |
1706 | it cannot be read from file. Return false if the size is OK | |
1707 | *or* this function can't say one way or the other. | |
1708 | ||
1709 | */ | |
1710 | ||
1711 | bool | |
1712 | _bfd_section_size_insane (bfd *abfd, asection *sec) | |
1713 | { | |
1714 | bfd_size_type size = bfd_get_section_limit_octets (abfd, sec); | |
1715 | if (size == 0) | |
1716 | return false; | |
1717 | ||
1718 | if ((bfd_section_flags (sec) & SEC_IN_MEMORY) != 0 | |
1719 | /* PR 24753: Linker created sections can be larger than | |
1720 | the file size, eg if they are being used to hold stubs. */ | |
1721 | || (bfd_section_flags (sec) & SEC_LINKER_CREATED) != 0 | |
1722 | /* PR 24753: Sections which have no content should also be | |
1723 | excluded as they contain no size on disk. */ | |
1724 | || (bfd_section_flags (sec) & SEC_HAS_CONTENTS) == 0 | |
1725 | /* The MMO file format supports its own special compression | |
1726 | technique, but it uses COMPRESS_SECTION_NONE when loading | |
1727 | a section's contents. */ | |
1728 | || bfd_get_flavour (abfd) == bfd_target_mmo_flavour) | |
1729 | return false; | |
1730 | ||
1731 | ufile_ptr filesize = bfd_get_file_size (abfd); | |
1732 | if (filesize == 0) | |
1733 | return false; | |
1734 | ||
1735 | if (sec->compress_status == DECOMPRESS_SECTION_ZSTD | |
1736 | || sec->compress_status == DECOMPRESS_SECTION_ZLIB) | |
1737 | { | |
1738 | /* PR26946, PR28834: Sanity check compress header uncompressed | |
1739 | size against the original file size, and check that the | |
1740 | compressed section can be read from file. We choose an | |
1741 | arbitrary uncompressed size of 10x the file size, rather than | |
1742 | a compress ratio. The reason being that compiling | |
1743 | "int aaa..a;" with "a" repeated enough times can result in | |
1744 | compression ratios without limit for .debug_str, whereas such | |
1745 | a file will usually also have the enormous symbol | |
1746 | uncompressed in .symtab. */ | |
1747 | if (size / 10 > filesize) | |
1748 | { | |
1749 | bfd_set_error (bfd_error_bad_value); | |
1750 | return true; | |
1751 | } | |
1752 | size = sec->compressed_size; | |
1753 | } | |
1754 | ||
1755 | if ((ufile_ptr) sec->filepos > filesize || size > filesize - sec->filepos) | |
1756 | { | |
1757 | bfd_set_error (bfd_error_file_truncated); | |
1758 | return true; | |
1759 | } | |
1760 | return false; | |
1761 | } |