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/* $NetBSD: db_sym.h,v 1.13 2000/05/25 19:57:36 jhawk Exp $ */
/*
* Mach Operating System
* Copyright (c) 1993,1992,1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 8/90
*/
/*
* This module can handle multiple symbol tables
*/
typedef struct {
const char *name; /* symtab name */
char *start; /* symtab location */
char *end;
char *private; /* optional machdep pointer */
} db_symtab_t;
extern db_symtab_t *db_last_symtab; /* where last symbol was found */
/*
* Symbol representation is specific to the symtab style:
* BSD compilers use dbx' nlist, other compilers might use
* a different one
*/
typedef char * db_sym_t; /* opaque handle on symbols */
#define DB_SYM_NULL ((db_sym_t)0)
/*
* Non-stripped symbol tables will have duplicates, for instance
* the same string could match a parameter name, a local var, a
* global var, etc.
* We are most concern with the following matches.
*/
typedef int db_strategy_t; /* search strategy */
#define DB_STGY_ANY 0 /* anything goes */
#define DB_STGY_XTRN 1 /* only external symbols */
#define DB_STGY_PROC 2 /* only procedures */
/*
* Internal db_forall function calling convention:
*
* (*db_forall_func)(stab, sym, name, suffix, prefix, arg);
*
* stab is the symbol table, symbol the (opaque) symbol pointer,
* name the name of the symbol, suffix a string representing
* the type, prefix an initial ignorable function prefix (e.g. "_"
* in a.out), and arg an opaque argument to be passed in.
*/
typedef void (db_forall_func_t)(db_symtab_t *, db_sym_t, char *, char *, int, void *);
void X_db_forall(db_symtab_t *,
db_forall_func_t db_forall_func, void *);
/*
* A symbol table may be in one of many formats. All symbol tables
* must be of the same format as the master kernel symbol table.
*/
typedef struct {
const char *sym_format;
boolean_t (*sym_init)(int, void *, void *, const char *);
db_sym_t (*sym_lookup)(db_symtab_t *, char *);
db_sym_t (*sym_search)(db_symtab_t *, db_addr_t, db_strategy_t,
db_expr_t *);
void (*sym_value)(db_symtab_t *, db_sym_t, char **,
db_expr_t *);
boolean_t (*sym_line_at_pc)(db_symtab_t *, db_sym_t,
char **, int *, db_expr_t);
boolean_t (*sym_numargs)(db_symtab_t *, db_sym_t, int *,
char **);
void (*sym_forall)(db_symtab_t *,
db_forall_func_t *db_forall_func, void *);
} db_symformat_t;
extern boolean_t db_qualify_ambiguous_names;
/* if TRUE, check across symbol tables
* for multiple occurrences of a name.
* Might slow down quite a bit */
extern unsigned int db_maxoff; /* like gdb's "max-symbolic-offset" */
/*
* Functions exported by the symtable module
*/
int db_add_symbol_table(char *, char *, const char *, char *);
/* extend the list of symbol tables */
void db_del_symbol_table(char *);
/* remove a symbol table from list */
boolean_t db_eqname(char *, char *, int);
/* strcmp, modulo leading char */
int db_value_of_name(char *, db_expr_t *);
/* find symbol value given name */
db_sym_t db_lookup(char *);
void db_sifting(char *, int);
/* print partially matching symbol names */
boolean_t db_symbol_is_ambiguous(db_sym_t);
db_sym_t db_search_symbol(db_addr_t, db_strategy_t, db_expr_t *);
/* find symbol given value */
void db_symbol_values(db_sym_t, char **, db_expr_t *);
/* return name and value of symbol */
#define db_find_sym_and_offset(val,namep,offp) \
db_symbol_values(db_search_symbol(val,DB_STGY_ANY,offp),namep,0)
/* find name&value given approx val */
#define db_find_xtrn_sym_and_offset(val,namep,offp) \
db_symbol_values(db_search_symbol(val,DB_STGY_XTRN,offp),namep,0)
/* ditto, but no locals */
void db_printsym(db_expr_t, db_strategy_t, int (*)(const char *, ...));
/* print closest symbol to a value */
boolean_t db_line_at_pc(db_sym_t, char **, int *, db_expr_t);
int db_sym_numargs(db_sym_t, int *, char **);
char *db_qualify(db_sym_t, const char *);
/*
* XXX - should explicitly ask for aout symbols in machine/db_machdep.h
*/
#ifndef DB_NO_AOUT
#define DB_AOUT_SYMBOLS
#endif
#ifdef DB_AOUT_SYMBOLS
extern db_symformat_t db_symformat_aout;
#endif
#ifdef DB_ELF_SYMBOLS
extern db_symformat_t db_symformat_elf;
#endif
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