1 /* Symbol table definitions for GDB.
2 Copyright 1986, 89, 91, 92, 93, 94, 95, 96, 1998
3 Free Software Foundation, Inc.
5 This file is part of GDB.
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 2 of the License, or
10 (at your option) any later version.
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.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 #if !defined (SYMTAB_H)
24 /* Some definitions and declarations to go with use of obstacks. */
27 #define obstack_chunk_alloc xmalloc
28 #define obstack_chunk_free free
31 #include "gnu-regex.h"
33 /* Don't do this; it means that if some .o's are compiled with GNU C
34 and some are not (easy to do accidentally the way we configure
35 things; also it is a pain to have to "make clean" every time you
36 want to switch compilers), then GDB dies a horrible death. */
37 /* GNU C supports enums that are bitfields. Some compilers don't. */
38 #if 0 && defined(__GNUC__) && !defined(BYTE_BITFIELD)
39 #define BYTE_BITFIELD :8;
41 #define BYTE_BITFIELD /*nothing*/
44 /* Define a structure for the information that is common to all symbol types,
45 including minimal symbols, partial symbols, and full symbols. In a
46 multilanguage environment, some language specific information may need to
47 be recorded along with each symbol.
49 These fields are ordered to encourage good packing, since we frequently
50 have tens or hundreds of thousands of these. */
52 struct general_symbol_info
54 /* Name of the symbol. This is a required field. Storage for the name is
55 allocated on the psymbol_obstack or symbol_obstack for the associated
60 /* Value of the symbol. Which member of this union to use, and what
61 it means, depends on what kind of symbol this is and its
62 SYMBOL_CLASS. See comments there for more details. All of these
63 are in host byte order (though what they point to might be in
64 target byte order, e.g. LOC_CONST_BYTES). */
68 /* The fact that this is a long not a LONGEST mainly limits the
69 range of a LOC_CONST. Since LOC_CONST_BYTES exists, I'm not
70 sure that is a big deal. */
79 /* for opaque typedef struct chain */
85 /* Since one and only one language can apply, wrap the language specific
86 information inside a union. */
90 struct cplus_specific /* For C++ */
91 /* start-sanitize-java */
93 /* end-sanitize-java */
97 struct chill_specific /* For Chill */
103 /* Record the source code language that applies to this symbol.
104 This is used to select one of the fields from the language specific
107 enum language language BYTE_BITFIELD;
109 /* Which section is this symbol in? This is an index into
110 section_offsets for this objfile. Negative means that the symbol
111 does not get relocated relative to a section.
112 Disclaimer: currently this is just used for xcoff, so don't
113 expect all symbol-reading code to set it correctly (the ELF code
114 also tries to set it correctly). */
118 /* The bfd section associated with this symbol. */
120 asection *bfd_section;
123 extern CORE_ADDR symbol_overlayed_address PARAMS((CORE_ADDR, asection *));
125 #define SYMBOL_NAME(symbol) (symbol)->ginfo.name
126 #define SYMBOL_VALUE(symbol) (symbol)->ginfo.value.ivalue
127 #define SYMBOL_VALUE_ADDRESS(symbol) (symbol)->ginfo.value.address
128 #define SYMBOL_VALUE_BYTES(symbol) (symbol)->ginfo.value.bytes
129 #define SYMBOL_BLOCK_VALUE(symbol) (symbol)->ginfo.value.block
130 #define SYMBOL_VALUE_CHAIN(symbol) (symbol)->ginfo.value.chain
131 #define SYMBOL_LANGUAGE(symbol) (symbol)->ginfo.language
132 #define SYMBOL_SECTION(symbol) (symbol)->ginfo.section
133 #define SYMBOL_BFD_SECTION(symbol) (symbol)->ginfo.bfd_section
135 #define SYMBOL_CPLUS_DEMANGLED_NAME(symbol) \
136 (symbol)->ginfo.language_specific.cplus_specific.demangled_name
138 /* Macro that initializes the language dependent portion of a symbol
139 depending upon the language for the symbol. */
141 #define SYMBOL_INIT_LANGUAGE_SPECIFIC(symbol,language) \
143 SYMBOL_LANGUAGE (symbol) = language; \
144 if (SYMBOL_LANGUAGE (symbol) == language_cplus \
145 /* start-sanitize-java */ \
146 || SYMBOL_LANGUAGE (symbol) == language_java \
147 /* end-sanitize-java */ \
150 SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = NULL; \
152 else if (SYMBOL_LANGUAGE (symbol) == language_chill) \
154 SYMBOL_CHILL_DEMANGLED_NAME (symbol) = NULL; \
158 memset (&(symbol)->ginfo.language_specific, 0, \
159 sizeof ((symbol)->ginfo.language_specific)); \
163 /* Macro that attempts to initialize the demangled name for a symbol,
164 based on the language of that symbol. If the language is set to
165 language_auto, it will attempt to find any demangling algorithm
166 that works and then set the language appropriately. If no demangling
167 of any kind is found, the language is set back to language_unknown,
168 so we can avoid doing this work again the next time we encounter
169 the symbol. Any required space to store the name is obtained from the
170 specified obstack. */
172 #define SYMBOL_INIT_DEMANGLED_NAME(symbol,obstack) \
174 char *demangled = NULL; \
175 if (SYMBOL_LANGUAGE (symbol) == language_cplus \
176 || SYMBOL_LANGUAGE (symbol) == language_auto) \
179 cplus_demangle (SYMBOL_NAME (symbol), DMGL_PARAMS | DMGL_ANSI);\
180 if (demangled != NULL) \
182 SYMBOL_LANGUAGE (symbol) = language_cplus; \
183 SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = \
184 obsavestring (demangled, strlen (demangled), (obstack)); \
189 SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = NULL; \
192 /* start-sanitize-java */ \
193 if (SYMBOL_LANGUAGE (symbol) == language_java) \
196 cplus_demangle (SYMBOL_NAME (symbol), \
197 DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA); \
198 if (demangled != NULL) \
200 SYMBOL_LANGUAGE (symbol) = language_java; \
201 SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = \
202 obsavestring (demangled, strlen (demangled), (obstack)); \
207 SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = NULL; \
210 /* end-sanitize-java */ \
211 if (demangled == NULL \
212 && (SYMBOL_LANGUAGE (symbol) == language_chill \
213 || SYMBOL_LANGUAGE (symbol) == language_auto)) \
216 chill_demangle (SYMBOL_NAME (symbol)); \
217 if (demangled != NULL) \
219 SYMBOL_LANGUAGE (symbol) = language_chill; \
220 SYMBOL_CHILL_DEMANGLED_NAME (symbol) = \
221 obsavestring (demangled, strlen (demangled), (obstack)); \
226 SYMBOL_CHILL_DEMANGLED_NAME (symbol) = NULL; \
229 if (SYMBOL_LANGUAGE (symbol) == language_auto) \
231 SYMBOL_LANGUAGE (symbol) = language_unknown; \
235 /* Macro that returns the demangled name for a symbol based on the language
236 for that symbol. If no demangled name exists, returns NULL. */
238 #define SYMBOL_DEMANGLED_NAME(symbol) \
239 (SYMBOL_LANGUAGE (symbol) == language_cplus \
240 /* start-sanitize-java */ \
241 || SYMBOL_LANGUAGE (symbol) == language_java \
242 /* end-sanitize-java */ \
243 ? SYMBOL_CPLUS_DEMANGLED_NAME (symbol) \
244 : (SYMBOL_LANGUAGE (symbol) == language_chill \
245 ? SYMBOL_CHILL_DEMANGLED_NAME (symbol) \
248 #define SYMBOL_CHILL_DEMANGLED_NAME(symbol) \
249 (symbol)->ginfo.language_specific.chill_specific.demangled_name
251 /* Macro that returns the "natural source name" of a symbol. In C++ this is
252 the "demangled" form of the name if demangle is on and the "mangled" form
253 of the name if demangle is off. In other languages this is just the
254 symbol name. The result should never be NULL. */
256 #define SYMBOL_SOURCE_NAME(symbol) \
257 (demangle && SYMBOL_DEMANGLED_NAME (symbol) != NULL \
258 ? SYMBOL_DEMANGLED_NAME (symbol) \
259 : SYMBOL_NAME (symbol))
261 /* Macro that returns the "natural assembly name" of a symbol. In C++ this is
262 the "mangled" form of the name if demangle is off, or if demangle is on and
263 asm_demangle is off. Otherwise if asm_demangle is on it is the "demangled"
264 form. In other languages this is just the symbol name. The result should
267 #define SYMBOL_LINKAGE_NAME(symbol) \
268 (demangle && asm_demangle && SYMBOL_DEMANGLED_NAME (symbol) != NULL \
269 ? SYMBOL_DEMANGLED_NAME (symbol) \
270 : SYMBOL_NAME (symbol))
272 /* Macro that tests a symbol for a match against a specified name string.
273 First test the unencoded name, then looks for and test a C++ encoded
274 name if it exists. Note that whitespace is ignored while attempting to
275 match a C++ encoded name, so that "foo::bar(int,long)" is the same as
276 "foo :: bar (int, long)".
277 Evaluates to zero if the match fails, or nonzero if it succeeds. */
279 #define SYMBOL_MATCHES_NAME(symbol, name) \
280 (STREQ (SYMBOL_NAME (symbol), (name)) \
281 || (SYMBOL_DEMANGLED_NAME (symbol) != NULL \
282 && strcmp_iw (SYMBOL_DEMANGLED_NAME (symbol), (name)) == 0))
284 /* Macro that tests a symbol for an re-match against the last compiled regular
285 expression. First test the unencoded name, then look for and test a C++
286 encoded name if it exists.
287 Evaluates to zero if the match fails, or nonzero if it succeeds. */
289 #define SYMBOL_MATCHES_REGEXP(symbol) \
290 (re_exec (SYMBOL_NAME (symbol)) != 0 \
291 || (SYMBOL_DEMANGLED_NAME (symbol) != NULL \
292 && re_exec (SYMBOL_DEMANGLED_NAME (symbol)) != 0))
294 /* Define a simple structure used to hold some very basic information about
295 all defined global symbols (text, data, bss, abs, etc). The only required
296 information is the general_symbol_info.
298 In many cases, even if a file was compiled with no special options for
299 debugging at all, as long as was not stripped it will contain sufficient
300 information to build a useful minimal symbol table using this structure.
301 Even when a file contains enough debugging information to build a full
302 symbol table, these minimal symbols are still useful for quickly mapping
303 between names and addresses, and vice versa. They are also sometimes
304 used to figure out what full symbol table entries need to be read in. */
306 struct minimal_symbol
309 /* The general symbol info required for all types of symbols.
311 The SYMBOL_VALUE_ADDRESS contains the address that this symbol
314 struct general_symbol_info ginfo;
316 /* The info field is available for caching machine-specific information
317 so it doesn't have to rederive the info constantly (over a serial line).
318 It is initialized to zero and stays that way until target-dependent code
319 sets it. Storage for any data pointed to by this field should be allo-
320 cated on the symbol_obstack for the associated objfile.
321 The type would be "void *" except for reasons of compatibility with older
322 compilers. This field is optional.
324 Currently, the AMD 29000 tdep.c uses it to remember things it has decoded
325 from the instructions in the function header, and the MIPS-16 code uses
326 it to identify 16-bit procedures. */
330 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
331 /* Which source file is this symbol in? Only relevant for mst_file_*. */
335 /* Classification types for this symbol. These should be taken as "advisory
336 only", since if gdb can't easily figure out a classification it simply
337 selects mst_unknown. It may also have to guess when it can't figure out
338 which is a better match between two types (mst_data versus mst_bss) for
339 example. Since the minimal symbol info is sometimes derived from the
340 BFD library's view of a file, we need to live with what information bfd
343 enum minimal_symbol_type
345 mst_unknown = 0, /* Unknown type, the default */
346 mst_text, /* Generally executable instructions */
347 mst_data, /* Generally initialized data */
348 mst_bss, /* Generally uninitialized data */
349 mst_abs, /* Generally absolute (nonrelocatable) */
350 /* GDB uses mst_solib_trampoline for the start address of a shared
351 library trampoline entry. Breakpoints for shared library functions
352 are put there if the shared library is not yet loaded.
353 After the shared library is loaded, lookup_minimal_symbol will
354 prefer the minimal symbol from the shared library (usually
355 a mst_text symbol) over the mst_solib_trampoline symbol, and the
356 breakpoints will be moved to their true address in the shared
357 library via breakpoint_re_set. */
358 mst_solib_trampoline, /* Shared library trampoline code */
359 /* For the mst_file* types, the names are only guaranteed to be unique
360 within a given .o file. */
361 mst_file_text, /* Static version of mst_text */
362 mst_file_data, /* Static version of mst_data */
363 mst_file_bss /* Static version of mst_bss */
364 } type BYTE_BITFIELD;
367 #define MSYMBOL_INFO(msymbol) (msymbol)->info
368 #define MSYMBOL_TYPE(msymbol) (msymbol)->type
371 /* All of the name-scope contours of the program
372 are represented by `struct block' objects.
373 All of these objects are pointed to by the blockvector.
375 Each block represents one name scope.
376 Each lexical context has its own block.
378 The blockvector begins with some special blocks.
379 The GLOBAL_BLOCK contains all the symbols defined in this compilation
380 whose scope is the entire program linked together.
381 The STATIC_BLOCK contains all the symbols whose scope is the
382 entire compilation excluding other separate compilations.
383 Blocks starting with the FIRST_LOCAL_BLOCK are not special.
385 Each block records a range of core addresses for the code that
386 is in the scope of the block. The STATIC_BLOCK and GLOBAL_BLOCK
387 give, for the range of code, the entire range of code produced
388 by the compilation that the symbol segment belongs to.
390 The blocks appear in the blockvector
391 in order of increasing starting-address,
392 and, within that, in order of decreasing ending-address.
394 This implies that within the body of one function
395 the blocks appear in the order of a depth-first tree walk. */
399 /* Number of blocks in the list. */
401 /* The blocks themselves. */
402 struct block *block[1];
405 #define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
406 #define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
408 /* Special block numbers */
410 #define GLOBAL_BLOCK 0
411 #define STATIC_BLOCK 1
412 #define FIRST_LOCAL_BLOCK 2
417 /* Addresses in the executable code that are in this block. */
422 /* The symbol that names this block, if the block is the body of a
423 function; otherwise, zero. */
425 struct symbol *function;
427 /* The `struct block' for the containing block, or 0 if none.
429 The superblock of a top-level local block (i.e. a function in the
430 case of C) is the STATIC_BLOCK. The superblock of the
431 STATIC_BLOCK is the GLOBAL_BLOCK. */
433 struct block *superblock;
435 /* Version of GCC used to compile the function corresponding
436 to this block, or 0 if not compiled with GCC. When possible,
437 GCC should be compatible with the native compiler, or if that
438 is not feasible, the differences should be fixed during symbol
439 reading. As of 16 Apr 93, this flag is never used to distinguish
440 between gcc2 and the native compiler.
442 If there is no function corresponding to this block, this meaning
443 of this flag is undefined. */
445 unsigned char gcc_compile_flag;
447 /* Number of local symbols. */
451 /* The symbols. If some of them are arguments, then they must be
452 in the order in which we would like to print them. */
454 struct symbol *sym[1];
457 #define BLOCK_START(bl) (bl)->startaddr
458 #define BLOCK_END(bl) (bl)->endaddr
459 #define BLOCK_NSYMS(bl) (bl)->nsyms
460 #define BLOCK_SYM(bl, n) (bl)->sym[n]
461 #define BLOCK_FUNCTION(bl) (bl)->function
462 #define BLOCK_SUPERBLOCK(bl) (bl)->superblock
463 #define BLOCK_GCC_COMPILED(bl) (bl)->gcc_compile_flag
465 /* Nonzero if symbols of block BL should be sorted alphabetically.
466 Don't sort a block which corresponds to a function. If we did the
467 sorting would have to preserve the order of the symbols for the
470 #define BLOCK_SHOULD_SORT(bl) ((bl)->nsyms >= 40 && BLOCK_FUNCTION (bl) == NULL)
473 /* Represent one symbol name; a variable, constant, function or typedef. */
475 /* Different name spaces for symbols. Looking up a symbol specifies a
476 namespace and ignores symbol definitions in other name spaces. */
480 /* UNDEF_NAMESPACE is used when a namespace has not been discovered or
481 none of the following apply. This usually indicates an error either
482 in the symbol information or in gdb's handling of symbols. */
486 /* VAR_NAMESPACE is the usual namespace. In C, this contains variables,
487 function names, typedef names and enum type values. */
491 /* STRUCT_NAMESPACE is used in C to hold struct, union and enum type names.
492 Thus, if `struct foo' is used in a C program, it produces a symbol named
493 `foo' in the STRUCT_NAMESPACE. */
497 /* LABEL_NAMESPACE may be used for names of labels (for gotos);
498 currently it is not used and labels are not recorded at all. */
502 /* Searching namespaces. These overlap with VAR_NAMESPACE, providing
503 some granularity with the search_symbols function. */
505 /* Everything in VAR_NAMESPACE minus FUNCTIONS_-, TYPES_-, and
509 /* All functions -- for some reason not methods, though. */
512 /* All defined types */
515 /* All class methods -- why is this separated out? */
520 /* An address-class says where to find the value of a symbol. */
524 /* Not used; catches errors */
528 /* Value is constant int SYMBOL_VALUE, host byteorder */
532 /* Value is at fixed address SYMBOL_VALUE_ADDRESS */
536 /* Value is in register. SYMBOL_VALUE is the register number. */
540 /* It's an argument; the value is at SYMBOL_VALUE offset in arglist. */
544 /* Value address is at SYMBOL_VALUE offset in arglist. */
548 /* Value is in register number SYMBOL_VALUE. Just like LOC_REGISTER
549 except this is an argument. Probably the cleaner way to handle
550 this would be to separate address_class (which would include
551 separate ARG and LOCAL to deal with FRAME_ARGS_ADDRESS versus
552 FRAME_LOCALS_ADDRESS), and an is_argument flag.
554 For some symbol formats (stabs, for some compilers at least),
555 the compiler generates two symbols, an argument and a register.
556 In some cases we combine them to a single LOC_REGPARM in symbol
557 reading, but currently not for all cases (e.g. it's passed on the
558 stack and then loaded into a register). */
562 /* Value is in specified register. Just like LOC_REGPARM except the
563 register holds the address of the argument instead of the argument
564 itself. This is currently used for the passing of structs and unions
565 on sparc and hppa. It is also used for call by reference where the
566 address is in a register, at least by mipsread.c. */
570 /* Value is a local variable at SYMBOL_VALUE offset in stack frame. */
574 /* Value not used; definition in SYMBOL_TYPE. Symbols in the namespace
575 STRUCT_NAMESPACE all have this class. */
579 /* Value is address SYMBOL_VALUE_ADDRESS in the code */
583 /* In a symbol table, value is SYMBOL_BLOCK_VALUE of a `struct block'.
584 In a partial symbol table, SYMBOL_VALUE_ADDRESS is the start address
585 of the block. Function names have this class. */
589 /* Value is a constant byte-sequence pointed to by SYMBOL_VALUE_BYTES, in
590 target byte order. */
594 /* Value is arg at SYMBOL_VALUE offset in stack frame. Differs from
595 LOC_LOCAL in that symbol is an argument; differs from LOC_ARG in
596 that we find it in the frame (FRAME_LOCALS_ADDRESS), not in the
597 arglist (FRAME_ARGS_ADDRESS). Added for i960, which passes args
598 in regs then copies to frame. */
602 /* Value is at SYMBOL_VALUE offset from the current value of
603 register number SYMBOL_BASEREG. This exists mainly for the same
604 things that LOC_LOCAL and LOC_ARG do; but we need to do this
605 instead because on 88k DWARF gives us the offset from the
606 frame/stack pointer, rather than the offset from the "canonical
607 frame address" used by COFF, stabs, etc., and we don't know how
608 to convert between these until we start examining prologues.
610 Note that LOC_BASEREG is much less general than a DWARF expression.
611 We don't need the generality (at least not yet), and storing a general
612 DWARF expression would presumably take up more space than the existing
617 /* Same as LOC_BASEREG but it is an argument. */
621 /* Value is at fixed address, but the address of the variable has
622 to be determined from the minimal symbol table whenever the
623 variable is referenced.
624 This happens if debugging information for a global symbol is
625 emitted and the corresponding minimal symbol is defined
626 in another object file or runtime common storage.
627 The linker might even remove the minimal symbol if the global
628 symbol is never referenced, in which case the symbol remains
633 /* The variable does not actually exist in the program.
634 The value is ignored. */
639 /* Linked list of symbol's live ranges. */
645 struct range_list *next;
648 /* Linked list of aliases for a particular main/primary symbol. */
652 struct alias_list *next;
658 /* The general symbol info required for all types of symbols. */
660 struct general_symbol_info ginfo;
662 /* Data type of value */
666 /* Name space code. */
669 /* FIXME: don't conflict with C++'s namespace */
670 /* would be safer to do a global change for all namespace identifiers. */
671 #define namespace _namespace
673 namespace_enum namespace BYTE_BITFIELD;
677 enum address_class aclass BYTE_BITFIELD;
679 /* Line number of definition. FIXME: Should we really make the assumption
680 that nobody will try to debug files longer than 64K lines? What about
681 machine generated programs? */
685 /* Some symbols require an additional value to be recorded on a per-
686 symbol basis. Stash those values here. */
690 /* Used by LOC_BASEREG and LOC_BASEREG_ARG. */
696 /* Link to a list of aliases for this symbol.
697 Only a "primary/main symbol may have aliases. */
698 struct alias_list *aliases;
700 /* List of ranges where this symbol is active. This is only
701 used by alias symbols at the current time. */
702 struct range_list *ranges;
706 #define SYMBOL_NAMESPACE(symbol) (symbol)->namespace
707 #define SYMBOL_CLASS(symbol) (symbol)->aclass
708 #define SYMBOL_TYPE(symbol) (symbol)->type
709 #define SYMBOL_LINE(symbol) (symbol)->line
710 #define SYMBOL_BASEREG(symbol) (symbol)->aux_value.basereg
711 #define SYMBOL_ALIASES(symbol) (symbol)->aliases
712 #define SYMBOL_RANGES(symbol) (symbol)->ranges
714 /* A partial_symbol records the name, namespace, and address class of
715 symbols whose types we have not parsed yet. For functions, it also
716 contains their memory address, so we can find them from a PC value.
717 Each partial_symbol sits in a partial_symtab, all of which are chained
718 on a partial symtab list and which points to the corresponding
719 normal symtab once the partial_symtab has been referenced. */
721 struct partial_symbol
724 /* The general symbol info required for all types of symbols. */
726 struct general_symbol_info ginfo;
728 /* Name space code. */
730 namespace_enum namespace BYTE_BITFIELD;
732 /* Address class (for info_symbols) */
734 enum address_class aclass BYTE_BITFIELD;
738 #define PSYMBOL_NAMESPACE(psymbol) (psymbol)->namespace
739 #define PSYMBOL_CLASS(psymbol) (psymbol)->aclass
742 /* Source-file information. This describes the relation between source files,
743 ine numbers and addresses in the program text. */
747 int length; /* Number of source files described */
748 struct source *source[1]; /* Descriptions of the files */
751 /* Each item represents a line-->pc (or the reverse) mapping. This is
752 somewhat more wasteful of space than one might wish, but since only
753 the files which are actually debugged are read in to core, we don't
756 struct linetable_entry
762 /* The order of entries in the linetable is significant. They should
763 be sorted by increasing values of the pc field. If there is more than
764 one entry for a given pc, then I'm not sure what should happen (and
765 I not sure whether we currently handle it the best way).
767 Example: a C for statement generally looks like this
769 10 0x100 - for the init/test part of a for stmt.
772 10 0x400 - for the increment part of a for stmt.
780 /* Actually NITEMS elements. If you don't like this use of the
781 `struct hack', you can shove it up your ANSI (seriously, if the
782 committee tells us how to do it, we can probably go along). */
783 struct linetable_entry item[1];
786 /* All the information on one source file. */
790 char *name; /* Name of file */
791 struct linetable contents;
794 /* How to relocate the symbols from each section in a symbol file.
795 Each struct contains an array of offsets.
796 The ordering and meaning of the offsets is file-type-dependent;
797 typically it is indexed by section numbers or symbol types or
800 To give us flexibility in changing the internal representation
801 of these offsets, the ANOFFSET macro must be used to insert and
802 extract offset values in the struct. */
804 struct section_offsets
806 CORE_ADDR offsets[1]; /* As many as needed. */
809 #define ANOFFSET(secoff, whichone) (secoff->offsets[whichone])
811 /* The maximum possible size of a section_offsets table. */
813 #define SIZEOF_SECTION_OFFSETS \
814 (sizeof (struct section_offsets) \
815 + sizeof (((struct section_offsets *) 0)->offsets) * (SECT_OFF_MAX-1))
818 /* Each source file or header is represented by a struct symtab.
819 These objects are chained through the `next' field. */
824 /* Chain of all existing symtabs. */
828 /* List of all symbol scope blocks for this symtab. May be shared
829 between different symtabs (and normally is for all the symtabs
830 in a given compilation unit). */
832 struct blockvector *blockvector;
834 /* Table mapping core addresses to line numbers for this file.
835 Can be NULL if none. Never shared between different symtabs. */
837 struct linetable *linetable;
839 /* Section in objfile->section_offsets for the blockvector and
840 the linetable. Probably always SECT_OFF_TEXT. */
842 int block_line_section;
844 /* If several symtabs share a blockvector, exactly one of them
845 should be designed the primary, so that the blockvector
846 is relocated exactly once by objfile_relocate. */
850 /* Name of this source file. */
854 /* Directory in which it was compiled, or NULL if we don't know. */
858 /* This component says how to free the data we point to:
859 free_contents => do a tree walk and free each object.
860 free_nothing => do nothing; some other symtab will free
861 the data this one uses.
862 free_linetable => free just the linetable. FIXME: Is this redundant
863 with the primary field? */
867 free_nothing, free_contents, free_linetable
871 /* Pointer to one block of storage to be freed, if nonzero. */
872 /* This is IN ADDITION to the action indicated by free_code. */
876 /* Total number of lines found in source file. */
880 /* line_charpos[N] is the position of the (N-1)th line of the
881 source file. "position" means something we can lseek() to; it
882 is not guaranteed to be useful any other way. */
886 /* Language of this source file. */
888 enum language language;
890 /* String that identifies the format of the debugging information, such
891 as "stabs", "dwarf 1", "dwarf 2", "coff", etc. This is mostly useful
892 for automated testing of gdb but may also be information that is
893 useful to the user. */
897 /* String of version information. May be zero. */
901 /* Full name of file as found by searching the source path.
902 NULL if not yet known. */
906 /* Object file from which this symbol information was read. */
908 struct objfile *objfile;
912 #define BLOCKVECTOR(symtab) (symtab)->blockvector
913 #define LINETABLE(symtab) (symtab)->linetable
916 /* Each source file that has not been fully read in is represented by
917 a partial_symtab. This contains the information on where in the
918 executable the debugging symbols for a specific file are, and a
919 list of names of global symbols which are located in this file.
920 They are all chained on partial symtab lists.
922 Even after the source file has been read into a symtab, the
923 partial_symtab remains around. They are allocated on an obstack,
924 psymbol_obstack. FIXME, this is bad for dynamic linking or VxWorks-
925 style execution of a bunch of .o's. */
927 struct partial_symtab
930 /* Chain of all existing partial symtabs. */
932 struct partial_symtab *next;
934 /* Name of the source file which this partial_symtab defines */
938 /* Information about the object file from which symbols should be read. */
940 struct objfile *objfile;
942 /* Set of relocation offsets to apply to each section. */
944 struct section_offsets *section_offsets;
946 /* Range of text addresses covered by this file; texthigh is the
947 beginning of the next section. */
952 /* Array of pointers to all of the partial_symtab's which this one
953 depends on. Since this array can only be set to previous or
954 the current (?) psymtab, this dependency tree is guaranteed not
955 to have any loops. "depends on" means that symbols must be read
956 for the dependencies before being read for this psymtab; this is
957 for type references in stabs, where if foo.c includes foo.h, declarations
958 in foo.h may use type numbers defined in foo.c. For other debugging
959 formats there may be no need to use dependencies. */
961 struct partial_symtab **dependencies;
963 int number_of_dependencies;
965 /* Global symbol list. This list will be sorted after readin to
966 improve access. Binary search will be the usual method of
967 finding a symbol within it. globals_offset is an integer offset
968 within global_psymbols[]. */
973 /* Static symbol list. This list will *not* be sorted after readin;
974 to find a symbol in it, exhaustive search must be used. This is
975 reasonable because searches through this list will eventually
976 lead to either the read in of a files symbols for real (assumed
977 to take a *lot* of time; check) or an error (and we don't care
978 how long errors take). This is an offset and size within
979 static_psymbols[]. */
984 /* Pointer to symtab eventually allocated for this source file, 0 if
985 !readin or if we haven't looked for the symtab after it was readin. */
987 struct symtab *symtab;
989 /* Pointer to function which will read in the symtab corresponding to
992 void (*read_symtab) PARAMS ((struct partial_symtab *));
994 /* Information that lets read_symtab() locate the part of the symbol table
995 that this psymtab corresponds to. This information is private to the
996 format-dependent symbol reading routines. For further detail examine
997 the various symbol reading modules. Should really be (void *) but is
998 (char *) as with other such gdb variables. (FIXME) */
1000 char *read_symtab_private;
1002 /* Non-zero if the symtab corresponding to this psymtab has been readin */
1004 unsigned char readin;
1007 /* A fast way to get from a psymtab to its symtab (after the first time). */
1008 #define PSYMTAB_TO_SYMTAB(pst) \
1009 ((pst) -> symtab != NULL ? (pst) -> symtab : psymtab_to_symtab (pst))
1012 /* The virtual function table is now an array of structures which have the
1013 form { int16 offset, delta; void *pfn; }.
1015 In normal virtual function tables, OFFSET is unused.
1016 DELTA is the amount which is added to the apparent object's base
1017 address in order to point to the actual object to which the
1018 virtual function should be applied.
1019 PFN is a pointer to the virtual function.
1021 Note that this macro is g++ specific (FIXME). */
1023 #define VTBL_FNADDR_OFFSET 2
1025 /* Macro that yields non-zero value iff NAME is the prefix for C++ operator
1026 names. If you leave out the parenthesis here you will lose!
1027 Currently 'o' 'p' CPLUS_MARKER is used for both the symbol in the
1028 symbol-file and the names in gdb's symbol table.
1029 Note that this macro is g++ specific (FIXME). */
1031 #define OPNAME_PREFIX_P(NAME) \
1032 ((NAME)[0] == 'o' && (NAME)[1] == 'p' && is_cplus_marker ((NAME)[2]))
1034 /* Macro that yields non-zero value iff NAME is the prefix for C++ vtbl
1035 names. Note that this macro is g++ specific (FIXME).
1036 '_vt$' is the old cfront-style vtables; '_VT$' is the new
1037 style, using thunks (where '$' is really CPLUS_MARKER). */
1039 #define VTBL_PREFIX_P(NAME) \
1041 && (((NAME)[1] == 'V' && (NAME)[2] == 'T') \
1042 || ((NAME)[1] == 'v' && (NAME)[2] == 't')) \
1043 && is_cplus_marker ((NAME)[3]))
1045 /* Macro that yields non-zero value iff NAME is the prefix for C++ destructor
1046 names. Note that this macro is g++ specific (FIXME). */
1048 #define DESTRUCTOR_PREFIX_P(NAME) \
1049 ((NAME)[0] == '_' && is_cplus_marker ((NAME)[1]) && (NAME)[2] == '_')
1052 /* External variables and functions for the objects described above. */
1054 /* This symtab variable specifies the current file for printing source lines */
1056 extern struct symtab *current_source_symtab;
1058 /* This is the next line to print for listing source lines. */
1060 extern int current_source_line;
1062 /* See the comment in symfile.c about how current_objfile is used. */
1064 extern struct objfile *current_objfile;
1066 /* True if we are nested inside psymtab_to_symtab. */
1068 extern int currently_reading_symtab;
1071 extern int demangle;
1072 extern int asm_demangle;
1074 /* symtab.c lookup functions */
1076 /* lookup a symbol table by source file name */
1078 extern struct symtab *
1079 lookup_symtab PARAMS ((char *));
1081 /* lookup a symbol by name (optional block, optional symtab) */
1083 extern struct symbol *
1084 lookup_symbol PARAMS ((const char *, const struct block *,
1085 const namespace_enum, int *, struct symtab **));
1087 /* lookup a symbol by name, within a specified block */
1089 extern struct symbol *
1090 lookup_block_symbol PARAMS ((const struct block *, const char *,
1091 const namespace_enum));
1093 /* lookup a [struct, union, enum] by name, within a specified block */
1095 extern struct type *
1096 lookup_struct PARAMS ((char *, struct block *));
1098 extern struct type *
1099 lookup_union PARAMS ((char *, struct block *));
1101 extern struct type *
1102 lookup_enum PARAMS ((char *, struct block *));
1104 /* lookup the function corresponding to the block */
1106 extern struct symbol *
1107 block_function PARAMS ((struct block *));
1109 /* from blockframe.c: */
1111 /* lookup the function symbol corresponding to the address */
1113 extern struct symbol *
1114 find_pc_function PARAMS ((CORE_ADDR));
1116 /* lookup the function corresponding to the address and section */
1118 extern struct symbol *
1119 find_pc_sect_function PARAMS ((CORE_ADDR, asection *));
1121 /* lookup function from address, return name, start addr and end addr */
1124 find_pc_partial_function PARAMS ((CORE_ADDR, char **,
1125 CORE_ADDR *, CORE_ADDR *));
1128 clear_pc_function_cache PARAMS ((void));
1131 find_pc_sect_partial_function PARAMS ((CORE_ADDR, asection *,
1132 char **, CORE_ADDR *, CORE_ADDR *));
1134 /* from symtab.c: */
1136 /* lookup partial symbol table by filename */
1138 extern struct partial_symtab *
1139 lookup_partial_symtab PARAMS ((char *));
1141 /* lookup partial symbol table by address */
1143 extern struct partial_symtab *
1144 find_pc_psymtab PARAMS ((CORE_ADDR));
1146 /* lookup partial symbol table by address and section */
1148 extern struct partial_symtab *
1149 find_pc_sect_psymtab PARAMS ((CORE_ADDR, asection *));
1151 /* lookup full symbol table by address */
1153 extern struct symtab *
1154 find_pc_symtab PARAMS ((CORE_ADDR));
1156 /* lookup full symbol table by address and section */
1158 extern struct symtab *
1159 find_pc_sect_symtab PARAMS ((CORE_ADDR, asection *));
1161 /* lookup partial symbol by address */
1163 extern struct partial_symbol *
1164 find_pc_psymbol PARAMS ((struct partial_symtab *, CORE_ADDR));
1166 /* lookup partial symbol by address and section */
1168 extern struct partial_symbol *
1169 find_pc_sect_psymbol PARAMS ((struct partial_symtab *, CORE_ADDR, asection *));
1172 find_pc_line_pc_range PARAMS ((CORE_ADDR, CORE_ADDR *, CORE_ADDR *));
1175 contained_in PARAMS ((struct block *, struct block *));
1178 reread_symbols PARAMS ((void));
1180 /* Macro for name of symbol to indicate a file compiled with gcc. */
1181 #ifndef GCC_COMPILED_FLAG_SYMBOL
1182 #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled."
1185 /* Macro for name of symbol to indicate a file compiled with gcc2. */
1186 #ifndef GCC2_COMPILED_FLAG_SYMBOL
1187 #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled."
1190 /* Functions for dealing with the minimal symbol table, really a misc
1191 address<->symbol mapping for things we don't have debug symbols for. */
1193 extern void prim_record_minimal_symbol PARAMS ((const char *, CORE_ADDR,
1194 enum minimal_symbol_type,
1197 extern struct minimal_symbol *prim_record_minimal_symbol_and_info
1198 PARAMS ((const char *, CORE_ADDR,
1199 enum minimal_symbol_type,
1200 char *info, int section,
1201 asection *bfd_section,
1204 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1205 extern CORE_ADDR find_stab_function_addr PARAMS ((char *,
1206 struct partial_symtab *,
1210 extern struct minimal_symbol *
1211 lookup_minimal_symbol PARAMS ((const char *, const char *, struct objfile *));
1213 extern struct minimal_symbol *
1214 lookup_minimal_symbol_text PARAMS ((const char *, const char *, struct objfile *));
1216 struct minimal_symbol *
1217 lookup_minimal_symbol_solib_trampoline PARAMS ((const char *,
1221 extern struct minimal_symbol *
1222 lookup_minimal_symbol_by_pc PARAMS ((CORE_ADDR));
1224 extern struct minimal_symbol *
1225 lookup_minimal_symbol_by_pc_section PARAMS ((CORE_ADDR, asection *));
1227 extern struct minimal_symbol *
1228 lookup_solib_trampoline_symbol_by_pc PARAMS ((CORE_ADDR));
1231 find_solib_trampoline_target PARAMS ((CORE_ADDR));
1234 init_minimal_symbol_collection PARAMS ((void));
1237 discard_minimal_symbols PARAMS ((int));
1240 install_minimal_symbols PARAMS ((struct objfile *));
1242 /* Sort all the minimal symbols in OBJFILE. */
1244 extern void msymbols_sort PARAMS ((struct objfile *objfile));
1246 struct symtab_and_line
1248 struct symtab *symtab;
1250 /* Line number. Line numbers start at 1 and proceed through symtab->nlines.
1251 0 is never a valid line number; it is used to indicate that line number
1252 information is not available. */
1259 #define INIT_SAL(sal) { \
1260 (sal)->symtab = 0; \
1261 (sal)->section = 0; \
1267 struct symtabs_and_lines
1269 struct symtab_and_line *sals;
1273 /* Given a pc value, return line number it is in. Second arg nonzero means
1274 if pc is on the boundary use the previous statement's line number. */
1276 extern struct symtab_and_line
1277 find_pc_line PARAMS ((CORE_ADDR, int));
1279 /* Same function, but specify a section as well as an address */
1281 extern struct symtab_and_line
1282 find_pc_sect_line PARAMS ((CORE_ADDR, asection *, int));
1284 /* Given an address, return the nearest symbol at or below it in memory.
1285 Optionally return the symtab it's from through 2nd arg, and the
1286 address in inferior memory of the symbol through 3rd arg. */
1288 extern struct symbol *
1289 find_addr_symbol PARAMS ((CORE_ADDR, struct symtab **, CORE_ADDR *));
1291 /* Given a symtab and line number, return the pc there. */
1294 find_line_pc PARAMS ((struct symtab *, int, CORE_ADDR *));
1297 find_line_pc_range PARAMS ((struct symtab_and_line,
1298 CORE_ADDR *, CORE_ADDR *));
1301 resolve_sal_pc PARAMS ((struct symtab_and_line *));
1303 /* Given a string, return the line specified by it. For commands like "list"
1304 and "breakpoint". */
1306 extern struct symtabs_and_lines
1307 decode_line_spec PARAMS ((char *, int));
1309 extern struct symtabs_and_lines
1310 decode_line_spec_1 PARAMS ((char *, int));
1312 extern struct symtabs_and_lines
1313 decode_line_1 PARAMS ((char **, int, struct symtab *, int, char ***));
1315 #if MAINTENANCE_CMDS
1320 maintenance_print_symbols PARAMS ((char *, int));
1323 maintenance_print_psymbols PARAMS ((char *, int));
1326 maintenance_print_msymbols PARAMS ((char *, int));
1329 maintenance_print_objfiles PARAMS ((char *, int));
1332 maintenance_check_symtabs PARAMS ((char *, int));
1337 maintenance_print_statistics PARAMS ((char *, int));
1342 free_symtab PARAMS ((struct symtab *));
1344 /* Symbol-reading stuff in symfile.c and solib.c. */
1346 extern struct symtab *
1347 psymtab_to_symtab PARAMS ((struct partial_symtab *));
1350 clear_solib PARAMS ((void));
1352 extern struct objfile *
1353 symbol_file_add PARAMS ((char *, int, CORE_ADDR, int, int, int));
1358 identify_source_line PARAMS ((struct symtab *, int, int, CORE_ADDR));
1361 print_source_lines PARAMS ((struct symtab *, int, int, int));
1364 forget_cached_source_info PARAMS ((void));
1367 select_source_symtab PARAMS ((struct symtab *));
1369 extern char **make_symbol_completion_list PARAMS ((char *, char *));
1371 extern void _initialize_source PARAMS ((void));
1375 extern struct partial_symtab *
1376 find_main_psymtab PARAMS ((void));
1380 extern struct blockvector *
1381 blockvector_for_pc PARAMS ((CORE_ADDR, int *));
1383 extern struct blockvector *
1384 blockvector_for_pc_sect PARAMS ((CORE_ADDR, asection *, int *,
1390 clear_symtab_users PARAMS ((void));
1392 extern enum language
1393 deduce_language_from_filename PARAMS ((char *));
1398 in_prologue PARAMS ((CORE_ADDR pc, CORE_ADDR func_start));
1400 extern struct symbol *
1401 fixup_symbol_section PARAMS ((struct symbol *, struct objfile *));
1403 /* Symbol searching */
1405 /* When using search_symbols, a list of the following structs is returned.
1406 Callers must free the search list using free_symbol_search! */
1407 struct symbol_search
1409 /* The block in which the match was found. Could be, for example,
1410 STATIC_BLOCK or GLOBAL_BLOCK. */
1413 /* Information describing what was found.
1415 If symtab abd symbol are NOT NULL, then information was found
1417 struct symtab *symtab;
1418 struct symbol *symbol;
1420 /* If msymbol is non-null, then a match was made on something for
1421 which only minimal_symbols exist. */
1422 struct minimal_symbol *msymbol;
1424 /* A link to the next match, or NULL for the end. */
1425 struct symbol_search *next;
1428 extern void search_symbols PARAMS ((char *, namespace_enum, int, char **, struct symbol_search **));
1429 extern void free_search_symbols PARAMS ((struct symbol_search *));
1431 #endif /* !defined(SYMTAB_H) */