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c906108c | 1 | /* Definitions for symbol file management in GDB. |
af5f3db6 | 2 | |
6aba47ca | 3 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
7b6bb8da JB |
4 | 2002, 2003, 2004, 2007, 2008, 2009, 2010, 2011 |
5 | Free Software Foundation, Inc. | |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #if !defined (OBJFILES_H) | |
23 | #define OBJFILES_H | |
24 | ||
3956d554 | 25 | #include "gdb_obstack.h" /* For obstack internals. */ |
0df8b418 | 26 | #include "symfile.h" /* For struct psymbol_allocation_list. */ |
6c95b8df | 27 | #include "progspace.h" |
3956d554 | 28 | |
af5f3db6 | 29 | struct bcache; |
2de7ced7 | 30 | struct htab; |
5c4e30ca | 31 | struct symtab; |
4a4b3fed | 32 | struct objfile_data; |
08c0b5bc | 33 | |
c906108c SS |
34 | /* This structure maintains information on a per-objfile basis about the |
35 | "entry point" of the objfile, and the scope within which the entry point | |
36 | exists. It is possible that gdb will see more than one objfile that is | |
37 | executable, each with its own entry point. | |
38 | ||
39 | For example, for dynamically linked executables in SVR4, the dynamic linker | |
40 | code is contained within the shared C library, which is actually executable | |
41 | and is run by the kernel first when an exec is done of a user executable | |
42 | that is dynamically linked. The dynamic linker within the shared C library | |
43 | then maps in the various program segments in the user executable and jumps | |
44 | to the user executable's recorded entry point, as if the call had been made | |
45 | directly by the kernel. | |
46 | ||
73c1e0a1 AC |
47 | The traditional gdb method of using this info was to use the |
48 | recorded entry point to set the entry-file's lowpc and highpc from | |
627b3ba2 AC |
49 | the debugging information, where these values are the starting |
50 | address (inclusive) and ending address (exclusive) of the | |
51 | instruction space in the executable which correspond to the | |
0df8b418 | 52 | "startup file", i.e. crt0.o in most cases. This file is assumed to |
627b3ba2 AC |
53 | be a startup file and frames with pc's inside it are treated as |
54 | nonexistent. Setting these variables is necessary so that | |
55 | backtraces do not fly off the bottom of the stack. | |
56 | ||
57 | NOTE: cagney/2003-09-09: It turns out that this "traditional" | |
58 | method doesn't work. Corinna writes: ``It turns out that the call | |
2f72f850 | 59 | to test for "inside entry file" destroys a meaningful backtrace |
0df8b418 | 60 | under some conditions. E.g. the backtrace tests in the asm-source |
627b3ba2 AC |
61 | testcase are broken for some targets. In this test the functions |
62 | are all implemented as part of one file and the testcase is not | |
63 | necessarily linked with a start file (depending on the target). | |
64 | What happens is, that the first frame is printed normaly and | |
65 | following frames are treated as being inside the enttry file then. | |
66 | This way, only the #0 frame is printed in the backtrace output.'' | |
67 | Ref "frame.c" "NOTE: vinschen/2003-04-01". | |
c906108c SS |
68 | |
69 | Gdb also supports an alternate method to avoid running off the bottom | |
70 | of the stack. | |
71 | ||
72 | There are two frames that are "special", the frame for the function | |
73 | containing the process entry point, since it has no predecessor frame, | |
74 | and the frame for the function containing the user code entry point | |
75 | (the main() function), since all the predecessor frames are for the | |
76 | process startup code. Since we have no guarantee that the linked | |
77 | in startup modules have any debugging information that gdb can use, | |
78 | we need to avoid following frame pointers back into frames that might | |
79 | have been built in the startup code, as we might get hopelessly | |
80 | confused. However, we almost always have debugging information | |
81 | available for main(). | |
82 | ||
618ce49f AC |
83 | These variables are used to save the range of PC values which are |
84 | valid within the main() function and within the function containing | |
85 | the process entry point. If we always consider the frame for | |
86 | main() as the outermost frame when debugging user code, and the | |
87 | frame for the process entry point function as the outermost frame | |
88 | when debugging startup code, then all we have to do is have | |
89 | DEPRECATED_FRAME_CHAIN_VALID return false whenever a frame's | |
90 | current PC is within the range specified by these variables. In | |
91 | essence, we set "ceilings" in the frame chain beyond which we will | |
c906108c SS |
92 | not proceed when following the frame chain back up the stack. |
93 | ||
94 | A nice side effect is that we can still debug startup code without | |
95 | running off the end of the frame chain, assuming that we have usable | |
96 | debugging information in the startup modules, and if we choose to not | |
97 | use the block at main, or can't find it for some reason, everything | |
98 | still works as before. And if we have no startup code debugging | |
99 | information but we do have usable information for main(), backtraces | |
6e4c6c91 | 100 | from user code don't go wandering off into the startup code. */ |
c906108c SS |
101 | |
102 | struct entry_info | |
c5aa993b | 103 | { |
abd0a5fa | 104 | /* The relocated value we should use for this objfile entry point. */ |
c5aa993b | 105 | CORE_ADDR entry_point; |
c906108c | 106 | |
abd0a5fa JK |
107 | /* Set to 1 iff ENTRY_POINT contains a valid value. */ |
108 | unsigned entry_point_p : 1; | |
c5aa993b | 109 | }; |
c906108c | 110 | |
f1f6aadf PA |
111 | /* Sections in an objfile. The section offsets are stored in the |
112 | OBJFILE. */ | |
c906108c | 113 | |
c5aa993b JM |
114 | struct obj_section |
115 | { | |
7be0c536 | 116 | struct bfd_section *the_bfd_section; /* BFD section pointer */ |
c906108c | 117 | |
c5aa993b JM |
118 | /* Objfile this section is part of. */ |
119 | struct objfile *objfile; | |
c906108c | 120 | |
0df8b418 | 121 | /* True if this "overlay section" is mapped into an "overlay region". */ |
c5aa993b JM |
122 | int ovly_mapped; |
123 | }; | |
c906108c | 124 | |
f1f6aadf PA |
125 | /* Relocation offset applied to S. */ |
126 | #define obj_section_offset(s) \ | |
127 | (((s)->objfile->section_offsets)->offsets[(s)->the_bfd_section->index]) | |
128 | ||
129 | /* The memory address of section S (vma + offset). */ | |
130 | #define obj_section_addr(s) \ | |
1706c199 | 131 | (bfd_get_section_vma ((s)->objfile->obfd, s->the_bfd_section) \ |
f1f6aadf PA |
132 | + obj_section_offset (s)) |
133 | ||
134 | /* The one-passed-the-end memory address of section S | |
135 | (vma + size + offset). */ | |
136 | #define obj_section_endaddr(s) \ | |
1706c199 | 137 | (bfd_get_section_vma ((s)->objfile->obfd, s->the_bfd_section) \ |
f1f6aadf PA |
138 | + bfd_get_section_size ((s)->the_bfd_section) \ |
139 | + obj_section_offset (s)) | |
c906108c | 140 | |
c906108c SS |
141 | /* The "objstats" structure provides a place for gdb to record some |
142 | interesting information about its internal state at runtime, on a | |
143 | per objfile basis, such as information about the number of symbols | |
0df8b418 | 144 | read, size of string table (if any), etc. */ |
c906108c | 145 | |
c5aa993b JM |
146 | struct objstats |
147 | { | |
148 | int n_minsyms; /* Number of minimal symbols read */ | |
149 | int n_psyms; /* Number of partial symbols read */ | |
150 | int n_syms; /* Number of full symbols read */ | |
151 | int n_stabs; /* Number of ".stabs" read (if applicable) */ | |
152 | int n_types; /* Number of types */ | |
153 | int sz_strtab; /* Size of stringtable, (if applicable) */ | |
154 | }; | |
c906108c SS |
155 | |
156 | #define OBJSTAT(objfile, expr) (objfile -> stats.expr) | |
157 | #define OBJSTATS struct objstats stats | |
a14ed312 KB |
158 | extern void print_objfile_statistics (void); |
159 | extern void print_symbol_bcache_statistics (void); | |
c906108c | 160 | |
9227b5eb | 161 | /* Number of entries in the minimal symbol hash table. */ |
375f3d86 | 162 | #define MINIMAL_SYMBOL_HASH_SIZE 2039 |
9227b5eb | 163 | |
c906108c SS |
164 | /* Master structure for keeping track of each file from which |
165 | gdb reads symbols. There are several ways these get allocated: 1. | |
166 | The main symbol file, symfile_objfile, set by the symbol-file command, | |
167 | 2. Additional symbol files added by the add-symbol-file command, | |
168 | 3. Shared library objfiles, added by ADD_SOLIB, 4. symbol files | |
169 | for modules that were loaded when GDB attached to a remote system | |
170 | (see remote-vx.c). */ | |
171 | ||
172 | struct objfile | |
c5aa993b | 173 | { |
c906108c | 174 | |
c5aa993b JM |
175 | /* All struct objfile's are chained together by their next pointers. |
176 | The global variable "object_files" points to the first link in this | |
177 | chain. | |
c906108c | 178 | |
c5aa993b JM |
179 | FIXME: There is a problem here if the objfile is reusable, and if |
180 | multiple users are to be supported. The problem is that the objfile | |
181 | list is linked through a member of the objfile struct itself, which | |
182 | is only valid for one gdb process. The list implementation needs to | |
183 | be changed to something like: | |
c906108c | 184 | |
c5aa993b | 185 | struct list {struct list *next; struct objfile *objfile}; |
c906108c | 186 | |
c5aa993b | 187 | where the list structure is completely maintained separately within |
0df8b418 | 188 | each gdb process. */ |
c906108c | 189 | |
c5aa993b | 190 | struct objfile *next; |
c906108c | 191 | |
d31d2fc3 JK |
192 | /* The object file's name, tilde-expanded and absolute. Malloc'd; free it |
193 | if you free this struct. This pointer is never NULL. */ | |
c906108c | 194 | |
c5aa993b | 195 | char *name; |
c906108c | 196 | |
e4f6d2ec TJB |
197 | CORE_ADDR addr_low; |
198 | ||
0838fb57 DE |
199 | /* Some flag bits for this objfile. |
200 | The values are defined by OBJF_*. */ | |
c906108c | 201 | |
c5aa993b | 202 | unsigned short flags; |
c906108c | 203 | |
6c95b8df PA |
204 | /* The program space associated with this objfile. */ |
205 | ||
206 | struct program_space *pspace; | |
207 | ||
c5aa993b JM |
208 | /* Each objfile points to a linked list of symtabs derived from this file, |
209 | one symtab structure for each compilation unit (source file). Each link | |
0df8b418 | 210 | in the symtab list contains a backpointer to this objfile. */ |
c906108c | 211 | |
c5aa993b | 212 | struct symtab *symtabs; |
c906108c | 213 | |
c5aa993b JM |
214 | /* Each objfile points to a linked list of partial symtabs derived from |
215 | this file, one partial symtab structure for each compilation unit | |
0df8b418 | 216 | (source file). */ |
c906108c | 217 | |
c5aa993b | 218 | struct partial_symtab *psymtabs; |
c906108c | 219 | |
ff013f42 JK |
220 | /* Map addresses to the entries of PSYMTABS. It would be more efficient to |
221 | have a map per the whole process but ADDRMAP cannot selectively remove | |
222 | its items during FREE_OBJFILE. This mapping is already present even for | |
223 | PARTIAL_SYMTABs which still have no corresponding full SYMTABs read. */ | |
224 | ||
225 | struct addrmap *psymtabs_addrmap; | |
226 | ||
0df8b418 | 227 | /* List of freed partial symtabs, available for re-use. */ |
c906108c | 228 | |
c5aa993b | 229 | struct partial_symtab *free_psymtabs; |
c906108c | 230 | |
c5aa993b JM |
231 | /* The object file's BFD. Can be null if the objfile contains only |
232 | minimal symbols, e.g. the run time common symbols for SunOS4. */ | |
c906108c | 233 | |
c5aa993b | 234 | bfd *obfd; |
c906108c | 235 | |
5e2b427d UW |
236 | /* The gdbarch associated with the BFD. Note that this gdbarch is |
237 | determined solely from BFD information, without looking at target | |
238 | information. The gdbarch determined from a running target may | |
239 | differ from this e.g. with respect to register types and names. */ | |
240 | ||
241 | struct gdbarch *gdbarch; | |
242 | ||
c5aa993b JM |
243 | /* The modification timestamp of the object file, as of the last time |
244 | we read its symbols. */ | |
c906108c | 245 | |
c5aa993b | 246 | long mtime; |
c906108c | 247 | |
904578ed JK |
248 | /* Cached 32-bit CRC as computed by gnu_debuglink_crc32. CRC32 is valid |
249 | iff CRC32_P. */ | |
250 | unsigned long crc32; | |
251 | int crc32_p; | |
252 | ||
b99607ea | 253 | /* Obstack to hold objects that should be freed when we load a new symbol |
0df8b418 | 254 | table from this object file. */ |
b99607ea | 255 | |
b99607ea EZ |
256 | struct obstack objfile_obstack; |
257 | ||
c5aa993b | 258 | /* A byte cache where we can stash arbitrary "chunks" of bytes that |
0df8b418 | 259 | will not change. */ |
c906108c | 260 | |
0df8b418 MS |
261 | struct psymbol_bcache *psymbol_cache; /* Byte cache for partial syms. */ |
262 | struct bcache *macro_cache; /* Byte cache for macros. */ | |
263 | struct bcache *filename_cache; /* Byte cache for file names. */ | |
c906108c | 264 | |
2de7ced7 DJ |
265 | /* Hash table for mapping symbol names to demangled names. Each |
266 | entry in the hash table is actually two consecutive strings, | |
267 | both null-terminated; the first one is a mangled or linkage | |
268 | name, and the second is the demangled name or just a zero byte | |
269 | if the name doesn't demangle. */ | |
270 | struct htab *demangled_names_hash; | |
271 | ||
c5aa993b | 272 | /* Vectors of all partial symbols read in from file. The actual data |
0df8b418 | 273 | is stored in the objfile_obstack. */ |
c906108c | 274 | |
c5aa993b JM |
275 | struct psymbol_allocation_list global_psymbols; |
276 | struct psymbol_allocation_list static_psymbols; | |
c906108c | 277 | |
c5aa993b | 278 | /* Each file contains a pointer to an array of minimal symbols for all |
3e43a32a MS |
279 | global symbols that are defined within the file. The array is |
280 | terminated by a "null symbol", one that has a NULL pointer for the | |
281 | name and a zero value for the address. This makes it easy to walk | |
282 | through the array when passed a pointer to somewhere in the middle | |
283 | of it. There is also a count of the number of symbols, which does | |
284 | not include the terminating null symbol. The array itself, as well | |
285 | as all the data that it points to, should be allocated on the | |
0df8b418 | 286 | objfile_obstack for this file. */ |
c906108c | 287 | |
c5aa993b JM |
288 | struct minimal_symbol *msymbols; |
289 | int minimal_symbol_count; | |
c906108c | 290 | |
9227b5eb JB |
291 | /* This is a hash table used to index the minimal symbols by name. */ |
292 | ||
293 | struct minimal_symbol *msymbol_hash[MINIMAL_SYMBOL_HASH_SIZE]; | |
294 | ||
295 | /* This hash table is used to index the minimal symbols by their | |
296 | demangled names. */ | |
297 | ||
298 | struct minimal_symbol *msymbol_demangled_hash[MINIMAL_SYMBOL_HASH_SIZE]; | |
299 | ||
c5aa993b | 300 | /* Structure which keeps track of functions that manipulate objfile's |
0df8b418 | 301 | of the same type as this objfile. I.e. the function to read partial |
c5aa993b JM |
302 | symbols for example. Note that this structure is in statically |
303 | allocated memory, and is shared by all objfiles that use the | |
0df8b418 | 304 | object module reader of this type. */ |
c906108c | 305 | |
00b5771c | 306 | const struct sym_fns *sf; |
c906108c | 307 | |
c5aa993b | 308 | /* The per-objfile information about the entry point, the scope (file/func) |
0df8b418 | 309 | containing the entry point, and the scope of the user's main() func. */ |
c906108c | 310 | |
c5aa993b | 311 | struct entry_info ei; |
c906108c | 312 | |
c5aa993b | 313 | /* Information about stabs. Will be filled in with a dbx_symfile_info |
0df8b418 | 314 | struct by those readers that need it. */ |
0a6ddd08 AC |
315 | /* NOTE: cagney/2004-10-23: This has been replaced by per-objfile |
316 | data points implemented using "data" and "num_data" below. For | |
317 | an example of how to use this replacement, see "objfile_data" | |
318 | in "mips-tdep.c". */ | |
c906108c | 319 | |
0a6ddd08 | 320 | struct dbx_symfile_info *deprecated_sym_stab_info; |
c906108c | 321 | |
c5aa993b JM |
322 | /* Hook for information for use by the symbol reader (currently used |
323 | for information shared by sym_init and sym_read). It is | |
324 | typically a pointer to malloc'd memory. The symbol reader's finish | |
325 | function is responsible for freeing the memory thusly allocated. */ | |
0a6ddd08 AC |
326 | /* NOTE: cagney/2004-10-23: This has been replaced by per-objfile |
327 | data points implemented using "data" and "num_data" below. For | |
328 | an example of how to use this replacement, see "objfile_data" | |
329 | in "mips-tdep.c". */ | |
c906108c | 330 | |
0a6ddd08 | 331 | void *deprecated_sym_private; |
c906108c | 332 | |
0d0e1a63 MK |
333 | /* Per objfile data-pointers required by other GDB modules. */ |
334 | /* FIXME: kettenis/20030711: This mechanism could replace | |
f98dfd4b TT |
335 | deprecated_sym_stab_info and deprecated_sym_private |
336 | entirely. */ | |
0d0e1a63 MK |
337 | |
338 | void **data; | |
339 | unsigned num_data; | |
340 | ||
c5aa993b | 341 | /* Set of relocation offsets to apply to each section. |
8b92e4d5 | 342 | Currently on the objfile_obstack (which makes no sense, but I'm |
c5aa993b | 343 | not sure it's harming anything). |
c906108c | 344 | |
c5aa993b JM |
345 | These offsets indicate that all symbols (including partial and |
346 | minimal symbols) which have been read have been relocated by this | |
347 | much. Symbols which are yet to be read need to be relocated by | |
348 | it. */ | |
c906108c | 349 | |
c5aa993b JM |
350 | struct section_offsets *section_offsets; |
351 | int num_sections; | |
c906108c | 352 | |
0df8b418 | 353 | /* Indexes in the section_offsets array. These are initialized by the |
b8fbeb18 | 354 | *_symfile_offsets() family of functions (som_symfile_offsets, |
0df8b418 | 355 | xcoff_symfile_offsets, default_symfile_offsets). In theory they |
b8fbeb18 | 356 | should correspond to the section indexes used by bfd for the |
0df8b418 MS |
357 | current objfile. The exception to this for the time being is the |
358 | SOM version. */ | |
b8fbeb18 EZ |
359 | |
360 | int sect_index_text; | |
361 | int sect_index_data; | |
362 | int sect_index_bss; | |
363 | int sect_index_rodata; | |
364 | ||
96baa820 | 365 | /* These pointers are used to locate the section table, which |
5c44784c | 366 | among other things, is used to map pc addresses into sections. |
96baa820 JM |
367 | SECTIONS points to the first entry in the table, and |
368 | SECTIONS_END points to the first location past the last entry | |
369 | in the table. Currently the table is stored on the | |
8b92e4d5 | 370 | objfile_obstack (which makes no sense, but I'm not sure it's |
96baa820 | 371 | harming anything). */ |
c906108c | 372 | |
c5aa993b JM |
373 | struct obj_section |
374 | *sections, *sections_end; | |
c906108c | 375 | |
15d123c9 TG |
376 | /* GDB allows to have debug symbols in separate object files. This is |
377 | used by .gnu_debuglink, ELF build id note and Mach-O OSO. | |
378 | Although this is a tree structure, GDB only support one level | |
379 | (ie a separate debug for a separate debug is not supported). Note that | |
380 | separate debug object are in the main chain and therefore will be | |
381 | visited by ALL_OBJFILES & co iterators. Separate debug objfile always | |
382 | has a non-nul separate_debug_objfile_backlink. */ | |
383 | ||
384 | /* Link to the first separate debug object, if any. */ | |
5b5d99cf JB |
385 | struct objfile *separate_debug_objfile; |
386 | ||
387 | /* If this is a separate debug object, this is used as a link to the | |
0df8b418 | 388 | actual executable objfile. */ |
5b5d99cf | 389 | struct objfile *separate_debug_objfile_backlink; |
15d123c9 TG |
390 | |
391 | /* If this is a separate debug object, this is a link to the next one | |
392 | for the same executable objfile. */ | |
393 | struct objfile *separate_debug_objfile_link; | |
394 | ||
0df8b418 | 395 | /* Place to stash various statistics about this objfile. */ |
c5aa993b | 396 | OBJSTATS; |
5c4e30ca | 397 | |
34eaf542 TT |
398 | /* A linked list of symbols created when reading template types or |
399 | function templates. These symbols are not stored in any symbol | |
400 | table, so we have to keep them here to relocate them | |
401 | properly. */ | |
402 | struct symbol *template_symbols; | |
c5aa993b | 403 | }; |
c906108c | 404 | |
0df8b418 | 405 | /* Defines for the objfile flag word. */ |
c906108c | 406 | |
c906108c SS |
407 | /* When an object file has its functions reordered (currently Irix-5.2 |
408 | shared libraries exhibit this behaviour), we will need an expensive | |
409 | algorithm to locate a partial symtab or symtab via an address. | |
410 | To avoid this penalty for normal object files, we use this flag, | |
411 | whose setting is determined upon symbol table read in. */ | |
412 | ||
8b41ec65 | 413 | #define OBJF_REORDERED (1 << 0) /* Functions are reordered */ |
c5aa993b | 414 | |
2df3850c | 415 | /* Distinguish between an objfile for a shared library and a "vanilla" |
0df8b418 | 416 | objfile. (If not set, the objfile may still actually be a solib. |
2df3850c JM |
417 | This can happen if the user created the objfile by using the |
418 | add-symbol-file command. GDB doesn't in that situation actually | |
419 | check whether the file is a solib. Rather, the target's | |
420 | implementation of the solib interface is responsible for setting | |
421 | this flag when noticing solibs used by an inferior.) */ | |
c906108c | 422 | |
8b41ec65 | 423 | #define OBJF_SHARED (1 << 1) /* From a shared library */ |
c906108c | 424 | |
0df8b418 | 425 | /* User requested that this objfile be read in it's entirety. */ |
2acceee2 | 426 | |
8b41ec65 | 427 | #define OBJF_READNOW (1 << 2) /* Immediate full read */ |
2acceee2 | 428 | |
2df3850c JM |
429 | /* This objfile was created because the user explicitly caused it |
430 | (e.g., used the add-symbol-file command). This bit offers a way | |
431 | for run_command to remove old objfile entries which are no longer | |
432 | valid (i.e., are associated with an old inferior), but to preserve | |
433 | ones that the user explicitly loaded via the add-symbol-file | |
0df8b418 | 434 | command. */ |
2df3850c | 435 | |
8b41ec65 | 436 | #define OBJF_USERLOADED (1 << 3) /* User loaded */ |
2df3850c | 437 | |
b11896a5 TT |
438 | /* Set if we have tried to read partial symtabs for this objfile. |
439 | This is used to allow lazy reading of partial symtabs. */ | |
440 | ||
441 | #define OBJF_PSYMTABS_READ (1 << 4) | |
442 | ||
0838fb57 DE |
443 | /* Set if this is the main symbol file |
444 | (as opposed to symbol file for dynamically loaded code). */ | |
445 | ||
446 | #define OBJF_MAINLINE (1 << 5) | |
447 | ||
c906108c | 448 | /* The object file that contains the runtime common minimal symbols |
0df8b418 | 449 | for SunOS4. Note that this objfile has no associated BFD. */ |
c906108c SS |
450 | |
451 | extern struct objfile *rt_common_objfile; | |
452 | ||
c906108c SS |
453 | /* Declarations for functions defined in objfiles.c */ |
454 | ||
a14ed312 | 455 | extern struct objfile *allocate_objfile (bfd *, int); |
c906108c | 456 | |
5e2b427d UW |
457 | extern struct gdbarch *get_objfile_arch (struct objfile *); |
458 | ||
9ab9195f EZ |
459 | extern void init_entry_point_info (struct objfile *); |
460 | ||
abd0a5fa JK |
461 | extern int entry_point_address_query (CORE_ADDR *entry_p); |
462 | ||
9ab9195f EZ |
463 | extern CORE_ADDR entry_point_address (void); |
464 | ||
a14ed312 | 465 | extern int build_objfile_section_table (struct objfile *); |
c906108c | 466 | |
15831452 JB |
467 | extern void terminate_minimal_symbol_table (struct objfile *objfile); |
468 | ||
15d123c9 TG |
469 | extern struct objfile *objfile_separate_debug_iterate (const struct objfile *, |
470 | const struct objfile *); | |
471 | ||
5b5d99cf JB |
472 | extern void put_objfile_before (struct objfile *, struct objfile *); |
473 | ||
a14ed312 | 474 | extern void objfile_to_front (struct objfile *); |
c906108c | 475 | |
15d123c9 TG |
476 | extern void add_separate_debug_objfile (struct objfile *, struct objfile *); |
477 | ||
a14ed312 | 478 | extern void unlink_objfile (struct objfile *); |
c906108c | 479 | |
a14ed312 | 480 | extern void free_objfile (struct objfile *); |
c906108c | 481 | |
15d123c9 TG |
482 | extern void free_objfile_separate_debug (struct objfile *); |
483 | ||
74b7792f AC |
484 | extern struct cleanup *make_cleanup_free_objfile (struct objfile *); |
485 | ||
a14ed312 | 486 | extern void free_all_objfiles (void); |
c906108c | 487 | |
a14ed312 | 488 | extern void objfile_relocate (struct objfile *, struct section_offsets *); |
c906108c | 489 | |
55333a84 DE |
490 | extern int objfile_has_partial_symbols (struct objfile *objfile); |
491 | ||
492 | extern int objfile_has_full_symbols (struct objfile *objfile); | |
493 | ||
e361b228 TG |
494 | extern int objfile_has_symbols (struct objfile *objfile); |
495 | ||
a14ed312 | 496 | extern int have_partial_symbols (void); |
c906108c | 497 | |
a14ed312 | 498 | extern int have_full_symbols (void); |
c906108c | 499 | |
bb272892 PP |
500 | extern void objfiles_changed (void); |
501 | ||
c906108c SS |
502 | /* This operation deletes all objfile entries that represent solibs that |
503 | weren't explicitly loaded by the user, via e.g., the add-symbol-file | |
0df8b418 MS |
504 | command. */ |
505 | ||
a14ed312 | 506 | extern void objfile_purge_solibs (void); |
c906108c SS |
507 | |
508 | /* Functions for dealing with the minimal symbol table, really a misc | |
509 | address<->symbol mapping for things we don't have debug symbols for. */ | |
510 | ||
a14ed312 | 511 | extern int have_minimal_symbols (void); |
c906108c | 512 | |
a14ed312 | 513 | extern struct obj_section *find_pc_section (CORE_ADDR pc); |
c906108c | 514 | |
a14ed312 | 515 | extern int in_plt_section (CORE_ADDR, char *); |
c906108c | 516 | |
0d0e1a63 MK |
517 | /* Keep a registry of per-objfile data-pointers required by other GDB |
518 | modules. */ | |
519 | ||
c1bd65d0 | 520 | /* Allocate an entry in the per-objfile registry. */ |
0d0e1a63 | 521 | extern const struct objfile_data *register_objfile_data (void); |
c1bd65d0 DE |
522 | |
523 | /* Allocate an entry in the per-objfile registry. | |
524 | SAVE and FREE are called when clearing objfile data. | |
525 | First all registered SAVE functions are called. | |
526 | Then all registered FREE functions are called. | |
527 | Either or both of SAVE, FREE may be NULL. */ | |
60c5725c | 528 | extern const struct objfile_data *register_objfile_data_with_cleanup |
c1bd65d0 DE |
529 | (void (*save) (struct objfile *, void *), |
530 | void (*free) (struct objfile *, void *)); | |
531 | ||
7b097ae3 | 532 | extern void clear_objfile_data (struct objfile *objfile); |
0d0e1a63 MK |
533 | extern void set_objfile_data (struct objfile *objfile, |
534 | const struct objfile_data *data, void *value); | |
535 | extern void *objfile_data (struct objfile *objfile, | |
536 | const struct objfile_data *data); | |
e3c69974 | 537 | |
3db741ef | 538 | extern struct bfd *gdb_bfd_ref (struct bfd *abfd); |
e3c69974 | 539 | extern void gdb_bfd_unref (struct bfd *abfd); |
516ba659 | 540 | extern int gdb_bfd_close_or_warn (struct bfd *abfd); |
0d0e1a63 MK |
541 | \f |
542 | ||
6c95b8df PA |
543 | /* Traverse all object files in the current program space. |
544 | ALL_OBJFILES_SAFE works even if you delete the objfile during the | |
545 | traversal. */ | |
546 | ||
547 | /* Traverse all object files in program space SS. */ | |
c906108c | 548 | |
6c95b8df PA |
549 | #define ALL_PSPACE_OBJFILES(ss, obj) \ |
550 | for ((obj) = ss->objfiles; (obj) != NULL; (obj) = (obj)->next) \ | |
c906108c | 551 | |
6c95b8df PA |
552 | #define ALL_PSPACE_OBJFILES_SAFE(ss, obj, nxt) \ |
553 | for ((obj) = ss->objfiles; \ | |
554 | (obj) != NULL? ((nxt)=(obj)->next,1) :0; \ | |
555 | (obj) = (nxt)) | |
556 | ||
557 | #define ALL_OBJFILES(obj) \ | |
558 | for ((obj) = current_program_space->objfiles; \ | |
559 | (obj) != NULL; \ | |
560 | (obj) = (obj)->next) | |
561 | ||
562 | #define ALL_OBJFILES_SAFE(obj,nxt) \ | |
563 | for ((obj) = current_program_space->objfiles; \ | |
c906108c SS |
564 | (obj) != NULL? ((nxt)=(obj)->next,1) :0; \ |
565 | (obj) = (nxt)) | |
566 | ||
567 | /* Traverse all symtabs in one objfile. */ | |
568 | ||
569 | #define ALL_OBJFILE_SYMTABS(objfile, s) \ | |
570 | for ((s) = (objfile) -> symtabs; (s) != NULL; (s) = (s) -> next) | |
571 | ||
c906108c SS |
572 | /* Traverse all minimal symbols in one objfile. */ |
573 | ||
574 | #define ALL_OBJFILE_MSYMBOLS(objfile, m) \ | |
3567439c | 575 | for ((m) = (objfile) -> msymbols; SYMBOL_LINKAGE_NAME(m) != NULL; (m)++) |
c906108c | 576 | |
6c95b8df PA |
577 | /* Traverse all symtabs in all objfiles in the current symbol |
578 | space. */ | |
c906108c SS |
579 | |
580 | #define ALL_SYMTABS(objfile, s) \ | |
581 | ALL_OBJFILES (objfile) \ | |
582 | ALL_OBJFILE_SYMTABS (objfile, s) | |
583 | ||
6c95b8df PA |
584 | #define ALL_PSPACE_SYMTABS(ss, objfile, s) \ |
585 | ALL_PSPACE_OBJFILES (ss, objfile) \ | |
586 | ALL_OBJFILE_SYMTABS (objfile, s) | |
587 | ||
588 | /* Traverse all symtabs in all objfiles in the current program space, | |
589 | skipping included files (which share a blockvector with their | |
590 | primary symtab). */ | |
11309657 DJ |
591 | |
592 | #define ALL_PRIMARY_SYMTABS(objfile, s) \ | |
593 | ALL_OBJFILES (objfile) \ | |
594 | ALL_OBJFILE_SYMTABS (objfile, s) \ | |
595 | if ((s)->primary) | |
596 | ||
6c95b8df PA |
597 | #define ALL_PSPACE_PRIMARY_SYMTABS(pspace, objfile, s) \ |
598 | ALL_PSPACE_OBJFILES (ss, objfile) \ | |
599 | ALL_OBJFILE_SYMTABS (objfile, s) \ | |
600 | if ((s)->primary) | |
601 | ||
6c95b8df PA |
602 | /* Traverse all minimal symbols in all objfiles in the current symbol |
603 | space. */ | |
c906108c SS |
604 | |
605 | #define ALL_MSYMBOLS(objfile, m) \ | |
606 | ALL_OBJFILES (objfile) \ | |
15831452 | 607 | ALL_OBJFILE_MSYMBOLS (objfile, m) |
c906108c SS |
608 | |
609 | #define ALL_OBJFILE_OSECTIONS(objfile, osect) \ | |
610 | for (osect = objfile->sections; osect < objfile->sections_end; osect++) | |
611 | ||
96a8853a PA |
612 | /* Traverse all obj_sections in all objfiles in the current program |
613 | space. | |
614 | ||
615 | Note that this detects a "break" in the inner loop, and exits | |
616 | immediately from the outer loop as well, thus, client code doesn't | |
617 | need to know that this is implemented with a double for. The extra | |
618 | hair is to make sure that a "break;" stops the outer loop iterating | |
619 | as well, and both OBJFILE and OSECT are left unmodified: | |
620 | ||
621 | - The outer loop learns about the inner loop's end condition, and | |
622 | stops iterating if it detects the inner loop didn't reach its | |
623 | end. In other words, the outer loop keeps going only if the | |
624 | inner loop reached its end cleanly [(osect) == | |
625 | (objfile)->sections_end]. | |
626 | ||
627 | - OSECT is initialized in the outer loop initialization | |
628 | expressions, such as if the inner loop has reached its end, so | |
629 | the check mentioned above succeeds the first time. | |
630 | ||
631 | - The trick to not clearing OBJFILE on a "break;" is, in the outer | |
632 | loop's loop expression, advance OBJFILE, but iff the inner loop | |
633 | reached its end. If not, there was a "break;", so leave OBJFILE | |
634 | as is; the outer loop's conditional will break immediately as | |
0df8b418 | 635 | well (as OSECT will be different from OBJFILE->sections_end). */ |
96a8853a PA |
636 | |
637 | #define ALL_OBJSECTIONS(objfile, osect) \ | |
638 | for ((objfile) = current_program_space->objfiles, \ | |
639 | (objfile) != NULL ? ((osect) = (objfile)->sections_end) : 0; \ | |
640 | (objfile) != NULL \ | |
641 | && (osect) == (objfile)->sections_end; \ | |
642 | ((osect) == (objfile)->sections_end \ | |
643 | ? ((objfile) = (objfile)->next, \ | |
644 | (objfile) != NULL ? (osect) = (objfile)->sections_end : 0) \ | |
645 | : 0)) \ | |
646 | for ((osect) = (objfile)->sections; \ | |
647 | (osect) < (objfile)->sections_end; \ | |
648 | (osect)++) | |
c906108c | 649 | |
b8fbeb18 | 650 | #define SECT_OFF_DATA(objfile) \ |
8e65ff28 | 651 | ((objfile->sect_index_data == -1) \ |
3e43a32a MS |
652 | ? (internal_error (__FILE__, __LINE__, \ |
653 | _("sect_index_data not initialized")), -1) \ | |
8e65ff28 | 654 | : objfile->sect_index_data) |
b8fbeb18 EZ |
655 | |
656 | #define SECT_OFF_RODATA(objfile) \ | |
8e65ff28 | 657 | ((objfile->sect_index_rodata == -1) \ |
3e43a32a MS |
658 | ? (internal_error (__FILE__, __LINE__, \ |
659 | _("sect_index_rodata not initialized")), -1) \ | |
8e65ff28 | 660 | : objfile->sect_index_rodata) |
b8fbeb18 EZ |
661 | |
662 | #define SECT_OFF_TEXT(objfile) \ | |
8e65ff28 | 663 | ((objfile->sect_index_text == -1) \ |
3e43a32a MS |
664 | ? (internal_error (__FILE__, __LINE__, \ |
665 | _("sect_index_text not initialized")), -1) \ | |
8e65ff28 | 666 | : objfile->sect_index_text) |
b8fbeb18 | 667 | |
a4c8257b | 668 | /* Sometimes the .bss section is missing from the objfile, so we don't |
0df8b418 MS |
669 | want to die here. Let the users of SECT_OFF_BSS deal with an |
670 | uninitialized section index. */ | |
a4c8257b | 671 | #define SECT_OFF_BSS(objfile) (objfile)->sect_index_bss |
b8fbeb18 | 672 | |
c14c28ba PP |
673 | /* Answer whether there is more than one object file loaded. */ |
674 | ||
675 | #define MULTI_OBJFILE_P() (object_files && object_files->next) | |
676 | ||
c5aa993b | 677 | #endif /* !defined (OBJFILES_H) */ |