FreeBSD/Linux Kernel Cross Reference
sys/ddb/db_sym.h

     /*      $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
     */
    
    #ifndef _DDB_DB_SYM_H_
    #define _DDB_DB_SYM_H_
    
    #include <sys/stdint.h>
    #include <sys/exec_elf.h>
    
    /*
     * 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)(Elf_Sym *, char *, char *, int, void *);
    
    extern unsigned int db_maxoff;          /* like gdb's "max-symbolic-offset" */
    
    int db_eqname(char *, char *, int);
                                            /* strcmp, modulo leading char */
    
    Elf_Sym * db_symbol_by_name(char *, db_expr_t *);
                                            /* find symbol value given name */
    
    Elf_Sym * db_search_symbol(vaddr_t, db_strategy_t, db_expr_t *);
                                            /* find symbol given value */
    
    void db_symbol_values(Elf_Sym *, 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,NULL)
                                            /* 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,NULL)
                                            /* ditto, but no locals */
    
    void db_printsym(db_expr_t, db_strategy_t, int (*)(const char *, ...));
                                            /* print closest symbol to a value */
    
    int db_elf_sym_init(int, void *, void *, const char *);
    Elf_Sym * db_elf_sym_search(vaddr_t, db_strategy_t, db_expr_t *);
    int db_elf_line_at_pc(Elf_Sym *, char **, int *, db_expr_t);
    void db_elf_sym_forall(db_forall_func_t db_forall_func, void *);
    
    bool db_dwarf_line_at_pc(const char *, size_t, uintptr_t,
        const char **, const char **, int *);
    
    int                      db_ctf_func_numargs(Elf_Sym *);
    
    #endif /* _DDB_DB_SYM_H_ */

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