db_sym.h

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    1 /*-
    2  * SPDX-License-Identifier: MIT-CMU
    3  *
    4  * Mach Operating System
    5  * Copyright (c) 1991,1990 Carnegie Mellon University
    6  * All Rights Reserved.
    7  *
    8  * Permission to use, copy, modify and distribute this software and its
    9  * documentation is hereby granted, provided that both the copyright
   10  * notice and this permission notice appear in all copies of the
   11  * software, derivative works or modified versions, and any portions
   12  * thereof, and that both notices appear in supporting documentation.
   13  *
   14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
   15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   16  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   17  *
   18  * Carnegie Mellon requests users of this software to return to
   19  *
   20  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   21  *  School of Computer Science
   22  *  Carnegie Mellon University
   23  *  Pittsburgh PA 15213-3890
   24  *
   25  * any improvements or extensions that they make and grant Carnegie the
   26  * rights to redistribute these changes.
   27  *
   28  * $FreeBSD$
   29  */
   30 
   31 #ifndef _DDB_DB_SYM_H_
   32 #define _DDB_DB_SYM_H_
   33 
   34 /*
   35  *      Author: Alessandro Forin, Carnegie Mellon University
   36  *      Date:   8/90
   37  */
   38 
   39 /*
   40  * This module can handle multiple symbol tables
   41  */
   42 typedef struct {
   43         char            *name;          /* symtab name */
   44         char            *start;         /* symtab location */
   45         char            *end;
   46         char            *private;       /* optional machdep pointer */
   47 } db_symtab_t;
   48 
   49 /*
   50  * Symbol representation is specific to the symtab style:
   51  * BSD compilers use dbx' nlist, other compilers might use
   52  * a different one
   53  */
   54 typedef char *          db_sym_t;       /* opaque handle on symbols */
   55 typedef const char *    c_db_sym_t;     /* const opaque handle on symbols */
   56 #define DB_SYM_NULL     ((db_sym_t)0)
   57 #define C_DB_SYM_NULL   ((c_db_sym_t)0)
   58 
   59 /*
   60  * Non-stripped symbol tables will have duplicates, for instance
   61  * the same string could match a parameter name, a local var, a
   62  * global var, etc.
   63  * We are most concern with the following matches.
   64  */
   65 typedef int             db_strategy_t;  /* search strategy */
   66 
   67 #define DB_STGY_ANY     0                       /* anything goes */
   68 #define DB_STGY_XTRN    1                       /* only external symbols */
   69 #define DB_STGY_PROC    2                       /* only procedures */
   70 
   71 /*
   72  * Functions exported by the symtable module
   73  */
   74 void            db_add_symbol_table(char *, char *, char *, char *);
   75                                         /* extend the list of symbol tables */
   76 
   77 c_db_sym_t      db_search_symbol(db_addr_t, db_strategy_t, db_expr_t *);
   78                                         /* find symbol given value */
   79 
   80 void            db_symbol_values(c_db_sym_t, const char **, db_expr_t *);
   81                                         /* return name and value of symbol */
   82 
   83 #define db_find_sym_and_offset(val,namep,offp)  \
   84         db_symbol_values(db_search_symbol(val,DB_STGY_ANY,offp),namep,0)
   85                                         /* find name&value given approx val */
   86 
   87 #define db_find_xtrn_sym_and_offset(val,namep,offp)     \
   88         db_symbol_values(db_search_symbol(val,DB_STGY_XTRN,offp),namep,0)
   89                                         /* ditto, but no locals */
   90 
   91 bool            db_eqname(const char *, const char *, int);
   92                                         /* strcmp, modulo leading char */
   93 
   94 void            db_printsym(db_expr_t, db_strategy_t);
   95                                         /* print closest symbol to a value */
   96 
   97 bool            db_sym_numargs(c_db_sym_t, int *, char **);
   98 
   99 bool            X_db_line_at_pc(db_symtab_t *symtab, c_db_sym_t cursym,
  100                     char **filename, int *linenum, db_expr_t off);
  101 c_db_sym_t      X_db_lookup(db_symtab_t *stab, const char *symstr);
  102 c_db_sym_t      X_db_search_symbol(db_symtab_t *symtab, db_addr_t off,
  103                     db_strategy_t strategy, db_expr_t *diffp);
  104 bool            X_db_sym_numargs(db_symtab_t *, c_db_sym_t, int *, char **);
  105 void            X_db_symbol_values(db_symtab_t *symtab, c_db_sym_t sym,
  106                     const char **namep, db_expr_t *valuep);
  107 
  108 void            db_decode_syscall(struct thread *td, u_int number);
  109 
  110 #endif /* !_DDB_DB_SYM_H_ */

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

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