mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-26 03:24:41 +08:00
28e7fd6234
Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
246 lines
8.9 KiB
C
246 lines
8.9 KiB
C
/* Minimal symbol table definitions for GDB.
|
||
|
||
Copyright (C) 2011-2013 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#ifndef MINSYMS_H
|
||
#define MINSYMS_H
|
||
|
||
/* This header declares most of the API for dealing with minimal
|
||
symbols and minimal symbol tables. A few things are declared
|
||
elsewhere; see below.
|
||
|
||
A minimal symbol is a symbol for which there is no direct debug
|
||
information. For example, for an ELF binary, minimal symbols are
|
||
created from the ELF symbol table.
|
||
|
||
For the definition of the minimal symbol structure, see struct
|
||
minimal_symbol in symtab.h.
|
||
|
||
Minimal symbols are stored in tables attached to an objfile; see
|
||
objfiles.h for details. Code should generally treat these tables
|
||
as opaque and use functions provided by minsyms.c to inspect them.
|
||
*/
|
||
|
||
/* Prepare to start collecting minimal symbols. This should be called
|
||
by a symbol reader to initialize the minimal symbol module.
|
||
Currently, minimal symbol table creation is not reentrant; it
|
||
relies on global (static) variables in minsyms.c. */
|
||
|
||
void init_minimal_symbol_collection (void);
|
||
|
||
/* Return a cleanup which is used to clean up the global state left
|
||
over by minimal symbol creation. After calling
|
||
init_minimal_symbol_collection, a symbol reader should call this
|
||
function. Then, after all minimal symbols have been read,
|
||
regardless of whether they are installed or not, the cleanup
|
||
returned by this function should be run. */
|
||
|
||
struct cleanup *make_cleanup_discard_minimal_symbols (void);
|
||
|
||
/* Record a new minimal symbol. This is the "full" entry point;
|
||
simpler convenience entry points are also provided below.
|
||
|
||
This returns a new minimal symbol. It is ok to modify the returned
|
||
minimal symbol (though generally not necessary). It is not ok,
|
||
though, to stash the pointer anywhere; as minimal symbols may be
|
||
moved after creation. The memory for the returned minimal symbol
|
||
is still owned by the minsyms.c code, and should not be freed.
|
||
|
||
Arguments are:
|
||
|
||
NAME - the symbol's name
|
||
NAME_LEN - the length of the name
|
||
COPY_NAME - if true, the minsym code must make a copy of NAME. If
|
||
false, then NAME must be NUL-terminated, and must have a lifetime
|
||
that is at least as long as OBJFILE's lifetime.
|
||
ADDRESS - the address of the symbol
|
||
MS_TYPE - the type of the symbol
|
||
SECTION - the symbol's section
|
||
BFD_SECTION - the symbol's BFD section; used to find the
|
||
appropriate obj_section for the minimal symbol. This can be NULL.
|
||
OBJFILE - the objfile associated with the minimal symbol. */
|
||
|
||
struct minimal_symbol *prim_record_minimal_symbol_full
|
||
(const char *name,
|
||
int name_len,
|
||
int copy_name,
|
||
CORE_ADDR address,
|
||
enum minimal_symbol_type ms_type,
|
||
int section,
|
||
asection *bfd_section,
|
||
struct objfile *objfile);
|
||
|
||
/* Like prim_record_minimal_symbol_full, but:
|
||
- uses strlen to compute NAME_LEN,
|
||
- passes COPY_NAME = 0,
|
||
- passes SECTION = 0,
|
||
- and passes BFD_SECTION = NULL.
|
||
|
||
This variant does not return the new symbol. */
|
||
|
||
void prim_record_minimal_symbol (const char *, CORE_ADDR,
|
||
enum minimal_symbol_type,
|
||
struct objfile *);
|
||
|
||
/* Like prim_record_minimal_symbol_full, but:
|
||
- uses strlen to compute NAME_LEN,
|
||
- passes COPY_NAME = 0. */
|
||
|
||
struct minimal_symbol *prim_record_minimal_symbol_and_info
|
||
(const char *,
|
||
CORE_ADDR,
|
||
enum minimal_symbol_type,
|
||
int section,
|
||
asection *bfd_section,
|
||
struct objfile *);
|
||
|
||
/* Install the minimal symbols that have been collected into the given
|
||
objfile. After this is called, the cleanup returned by
|
||
make_cleanup_discard_minimal_symbols should be run in order to
|
||
clean up global state. */
|
||
|
||
void install_minimal_symbols (struct objfile *);
|
||
|
||
/* Create the terminating entry of OBJFILE's minimal symbol table.
|
||
If OBJFILE->msymbols is zero, allocate a single entry from
|
||
OBJFILE->objfile_obstack; otherwise, just initialize
|
||
OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */
|
||
|
||
void terminate_minimal_symbol_table (struct objfile *objfile);
|
||
|
||
/* Sort all the minimal symbols in OBJFILE. This should be only be
|
||
called after relocating symbols; it ensures that the minimal
|
||
symbols are properly sorted by address. */
|
||
|
||
void msymbols_sort (struct objfile *objfile);
|
||
|
||
|
||
|
||
/* Compute a hash code for the string argument. */
|
||
|
||
unsigned int msymbol_hash (const char *);
|
||
|
||
/* Like msymbol_hash, but compute a hash code that is compatible with
|
||
strcmp_iw. */
|
||
|
||
unsigned int msymbol_hash_iw (const char *);
|
||
|
||
/* Compute the next hash value from previous HASH and the character C. This
|
||
is only a GDB in-memory computed value with no external files compatibility
|
||
requirements. */
|
||
|
||
#define SYMBOL_HASH_NEXT(hash, c) \
|
||
((hash) * 67 + tolower ((unsigned char) (c)) - 113)
|
||
|
||
|
||
|
||
/* Return the objfile that holds the minimal symbol SYM. Every
|
||
minimal symbols is held by some objfile; this will never return
|
||
NULL. */
|
||
|
||
struct objfile *msymbol_objfile (struct minimal_symbol *sym);
|
||
|
||
|
||
|
||
/* Look through all the current minimal symbol tables and find the
|
||
first minimal symbol that matches NAME. If OBJF is non-NULL, limit
|
||
the search to that objfile. If SFILE is non-NULL, the only file-scope
|
||
symbols considered will be from that source file (global symbols are
|
||
still preferred). Returns a pointer to the minimal symbol that
|
||
matches, or NULL if no match is found. */
|
||
|
||
struct minimal_symbol *lookup_minimal_symbol (const char *,
|
||
const char *,
|
||
struct objfile *);
|
||
|
||
/* Find the minimal symbol named NAME, and return both the minsym
|
||
struct and its objfile. This only checks the linkage name. Sets
|
||
*OBJFILE_P and returns the minimal symbol, if it is found. If it
|
||
is not found, returns NULL. */
|
||
|
||
struct minimal_symbol *lookup_minimal_symbol_and_objfile (const char *,
|
||
struct objfile **);
|
||
|
||
/* Look through all the current minimal symbol tables and find the
|
||
first minimal symbol that matches NAME and has text type. If OBJF
|
||
is non-NULL, limit the search to that objfile. Returns a pointer
|
||
to the minimal symbol that matches, or NULL if no match is found.
|
||
|
||
This function only searches the mangled (linkage) names. */
|
||
|
||
struct minimal_symbol *lookup_minimal_symbol_text (const char *,
|
||
struct objfile *);
|
||
|
||
/* Look through all the current minimal symbol tables and find the
|
||
first minimal symbol that matches NAME and is a solib trampoline.
|
||
If OBJF is non-NULL, limit the search to that objfile. Returns a
|
||
pointer to the minimal symbol that matches, or NULL if no match is
|
||
found.
|
||
|
||
This function only searches the mangled (linkage) names. */
|
||
|
||
struct minimal_symbol *lookup_minimal_symbol_solib_trampoline
|
||
(const char *,
|
||
struct objfile *);
|
||
|
||
/* Look through all the current minimal symbol tables and find the
|
||
first minimal symbol that matches NAME and PC. If OBJF is non-NULL,
|
||
limit the search to that objfile. Returns a pointer to the minimal
|
||
symbol that matches, or NULL if no match is found. */
|
||
|
||
struct minimal_symbol *lookup_minimal_symbol_by_pc_name
|
||
(CORE_ADDR, const char *, struct objfile *);
|
||
|
||
/* Search through the minimal symbol table for each objfile and find
|
||
the symbol whose address is the largest address that is still less
|
||
than or equal to PC, and which matches SECTION.
|
||
|
||
If SECTION is NULL, this uses the result of find_pc_section
|
||
instead.
|
||
|
||
Returns a pointer to the minimal symbol if such a symbol is found,
|
||
or NULL if PC is not in a suitable range. */
|
||
|
||
struct minimal_symbol *lookup_minimal_symbol_by_pc_section
|
||
(CORE_ADDR,
|
||
struct obj_section *);
|
||
|
||
/* Backward compatibility: search through the minimal symbol table
|
||
for a matching PC (no section given).
|
||
|
||
This is a wrapper that calls lookup_minimal_symbol_by_pc_section
|
||
with a NULL section argument. */
|
||
|
||
struct minimal_symbol *lookup_minimal_symbol_by_pc (CORE_ADDR);
|
||
|
||
/* Iterate over all the minimal symbols in the objfile OBJF which
|
||
match NAME. Both the ordinary and demangled names of each symbol
|
||
are considered. The caller is responsible for canonicalizing NAME,
|
||
should that need to be done.
|
||
|
||
For each matching symbol, CALLBACK is called with the symbol and
|
||
USER_DATA as arguments. */
|
||
|
||
void iterate_over_minimal_symbols (struct objfile *objf,
|
||
const char *name,
|
||
void (*callback) (struct minimal_symbol *,
|
||
void *),
|
||
void *user_data);
|
||
|
||
#endif /* MINSYMS_H */
|