The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*
    2  * Mach Operating System
    3  * Copyright (c) 1991,1990 Carnegie Mellon University
    4  * All Rights Reserved.
    5  *
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  *
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  *
   16  * Carnegie Mellon requests users of this software to return to
   17  *
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  *
   23  * any improvements or extensions that they make and grant Carnegie the
   24  * rights to redistribute these changes.
   25  *
   26  * $FreeBSD$
   27  */
   28 
   29 #ifndef _DDB_DB_SYM_H_
   30 #define _DDB_DB_SYM_H_
   31 
   32 /*
   33  *      Author: Alessandro Forin, Carnegie Mellon University
   34  *      Date:   8/90
   35  */
   36 
   37 /*
   38  * This module can handle multiple symbol tables
   39  */
   40 typedef struct {
   41         char            *name;          /* symtab name */
   42         char            *start;         /* symtab location */
   43         char            *end;
   44         char            *private;       /* optional machdep pointer */
   45 } db_symtab_t;
   46 
   47 /*
   48  * Symbol representation is specific to the symtab style:
   49  * BSD compilers use dbx' nlist, other compilers might use
   50  * a different one
   51  */
   52 typedef char *          db_sym_t;       /* opaque handle on symbols */
   53 #define DB_SYM_NULL     ((db_sym_t)0)
   54 
   55 /*
   56  * Non-stripped symbol tables will have duplicates, for instance
   57  * the same string could match a parameter name, a local var, a
   58  * global var, etc.
   59  * We are most concern with the following matches.
   60  */
   61 typedef int             db_strategy_t;  /* search strategy */
   62 
   63 #define DB_STGY_ANY     0                       /* anything goes */
   64 #define DB_STGY_XTRN    1                       /* only external symbols */
   65 #define DB_STGY_PROC    2                       /* only procedures */
   66 
   67 /*
   68  * Functions exported by the symtable module
   69  */
   70 void            db_add_symbol_table __P((char *, char *, char *, char *));
   71                                         /* extend the list of symbol tables */
   72 
   73 db_sym_t        db_search_symbol __P((db_addr_t, db_strategy_t, db_expr_t *));
   74                                         /* find symbol given value */
   75 
   76 void            db_symbol_values __P((db_sym_t, char **, db_expr_t *));
   77                                         /* return name and value of symbol */
   78 
   79 #define db_find_sym_and_offset(val,namep,offp)  \
   80         db_symbol_values(db_search_symbol(val,DB_STGY_ANY,offp),namep,0)
   81                                         /* find name&value given approx val */
   82 
   83 #define db_find_xtrn_sym_and_offset(val,namep,offp)     \
   84         db_symbol_values(db_search_symbol(val,DB_STGY_XTRN,offp),namep,0)
   85                                         /* ditto, but no locals */
   86 
   87 int             db_eqname __P((char *, char *, int));
   88                                         /* strcmp, modulo leading char */
   89 
   90 void            db_printsym __P((db_expr_t, db_strategy_t));
   91                                         /* print closest symbol to a value */
   92 
   93 int             db_sym_numargs __P((db_sym_t, int *, char **));
   94 
   95 boolean_t       X_db_line_at_pc __P((db_symtab_t *symtab, db_sym_t cursym,
   96                                      char **filename, int *linenum,
   97                                      db_expr_t off));
   98 db_sym_t        X_db_lookup __P((db_symtab_t *stab, char *symstr));
   99 db_sym_t        X_db_search_symbol __P((db_symtab_t *symtab, db_addr_t off,
  100                                         db_strategy_t strategy,
  101                                         db_expr_t *diffp));
  102 int             X_db_sym_numargs __P((db_symtab_t *, db_sym_t, int *,
  103                                       char **));
  104 void            X_db_symbol_values __P((db_symtab_t *symtab,
  105                                         db_sym_t sym, char **namep,
  106                                         db_expr_t *valuep));
  107 
  108 #endif /* !_DDB_DB_SYM_H_ */

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