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: stable/9/sys/ddb/db_sym.h 264217 2014-04-07 02:36:30Z pfg $
   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 typedef const char *    c_db_sym_t;     /* const opaque handle on symbols */
   54 #define DB_SYM_NULL     ((db_sym_t)0)
   55 #define C_DB_SYM_NULL   ((c_db_sym_t)0)
   56 
   57 /*
   58  * Non-stripped symbol tables will have duplicates, for instance
   59  * the same string could match a parameter name, a local var, a
   60  * global var, etc.
   61  * We are most concern with the following matches.
   62  */
   63 typedef int             db_strategy_t;  /* search strategy */
   64 
   65 #define DB_STGY_ANY     0                       /* anything goes */
   66 #define DB_STGY_XTRN    1                       /* only external symbols */
   67 #define DB_STGY_PROC    2                       /* only procedures */
   68 
   69 /*
   70  * Functions exported by the symtable module
   71  */
   72 void            db_add_symbol_table(char *, char *, char *, char *);
   73                                         /* extend the list of symbol tables */
   74 
   75 c_db_sym_t      db_search_symbol(db_addr_t, db_strategy_t, db_expr_t *);
   76                                         /* find symbol given value */
   77 
   78 void            db_symbol_values(c_db_sym_t, const char **, db_expr_t *);
   79                                         /* return name and value of symbol */
   80 
   81 #define db_find_sym_and_offset(val,namep,offp)  \
   82         db_symbol_values(db_search_symbol(val,DB_STGY_ANY,offp),namep,0)
   83                                         /* find name&value given approx val */
   84 
   85 #define db_find_xtrn_sym_and_offset(val,namep,offp)     \
   86         db_symbol_values(db_search_symbol(val,DB_STGY_XTRN,offp),namep,0)
   87                                         /* ditto, but no locals */
   88 
   89 int             db_eqname(const char *, const char *, int);
   90                                         /* strcmp, modulo leading char */
   91 
   92 void            db_printsym(db_expr_t, db_strategy_t);
   93                                         /* print closest symbol to a value */
   94 
   95 int             db_sym_numargs(c_db_sym_t, int *, char **);
   96 
   97 boolean_t       X_db_line_at_pc(db_symtab_t *symtab, c_db_sym_t cursym,
   98                     char **filename, int *linenum, db_expr_t off);
   99 c_db_sym_t      X_db_lookup(db_symtab_t *stab, const char *symstr);
  100 c_db_sym_t      X_db_search_symbol(db_symtab_t *symtab, db_addr_t off,
  101                     db_strategy_t strategy, db_expr_t *diffp);
  102 int             X_db_sym_numargs(db_symtab_t *, c_db_sym_t, int *, char **);
  103 void            X_db_symbol_values(db_symtab_t *symtab, c_db_sym_t sym,
  104                     const char **namep, db_expr_t *valuep);
  105 
  106 #endif /* !_DDB_DB_SYM_H_ */

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