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Annotation of Net2/ddb/db_sym.h, revision 1.1.1.3

1.1       root        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  [email protected]
                     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: /*
1.1.1.3 ! root       27:  * db_sym.h,v 1.2 1993/05/20 03:39:32 cgd Exp
        !            28:  *
1.1       root       29:  * HISTORY
1.1.1.3 ! root       30:  * db_sym.h,v
        !            31:  * Revision 1.2  1993/05/20  03:39:32  cgd
        !            32:  * add explicit rcs id
        !            33:  *
        !            34:  * Revision 1.1.1.1  1993/03/21  09:46:27  cgd
1.1.1.2   root       35:  * initial import of 386bsd-0.1 sources
                     36:  *
1.1       root       37:  * Revision 1.1  1992/03/25  21:45:29  pace
                     38:  * Initial revision
                     39:  *
                     40:  * Revision 2.3  91/02/05  17:07:12  mrt
                     41:  *     Changed to new Mach copyright
                     42:  *     [91/01/31  16:19:27  mrt]
                     43:  * 
                     44:  * Revision 2.2  90/08/27  21:52:39  dbg
                     45:  *     Changed type of db_sym_t to char * - it's a better type for an
                     46:  *     opaque pointer.
                     47:  *     [90/08/22            dbg]
                     48:  * 
                     49:  *     Created.
                     50:  *     [90/08/19            af]
                     51:  * 
                     52:  */
                     53: /*
                     54:  *     Author: Alessandro Forin, Carnegie Mellon University
                     55:  *     Date:   8/90
                     56:  */
                     57: 
                     58: /*
                     59:  * This module can handle multiple symbol tables
                     60:  */
                     61: typedef struct {
                     62:        char            *name;          /* symtab name */
                     63:        char            *start;         /* symtab location */
                     64:        char            *end;
                     65:        char            *private;       /* optional machdep pointer */
                     66: } db_symtab_t;
                     67: 
                     68: extern db_symtab_t     *db_last_symtab; /* where last symbol was found */
                     69: 
                     70: /*
                     71:  * Symbol representation is specific to the symtab style:
                     72:  * BSD compilers use dbx' nlist, other compilers might use
                     73:  * a different one
                     74:  */
                     75: typedef        char *          db_sym_t;       /* opaque handle on symbols */
                     76: #define        DB_SYM_NULL     ((db_sym_t)0)
                     77: 
                     78: /*
                     79:  * Non-stripped symbol tables will have duplicates, for instance
                     80:  * the same string could match a parameter name, a local var, a
                     81:  * global var, etc.
                     82:  * We are most concern with the following matches.
                     83:  */
                     84: typedef int            db_strategy_t;  /* search strategy */
                     85: 
                     86: #define        DB_STGY_ANY     0                       /* anything goes */
                     87: #define DB_STGY_XTRN   1                       /* only external symbols */
                     88: #define DB_STGY_PROC   2                       /* only procedures */
                     89: 
                     90: extern boolean_t       db_qualify_ambiguous_names;
                     91:                                        /* if TRUE, check across symbol tables
                     92:                                         * for multiple occurrences of a name.
                     93:                                         * Might slow down quite a bit */
                     94: 
                     95: /*
                     96:  * Functions exported by the symtable module
                     97:  */
                     98: extern void    db_add_symbol_table();
                     99:                                        /* extend the list of symbol tables */
                    100: 
                    101: extern int     db_value_of_name(/* char*, db_expr_t* */);
                    102:                                        /* find symbol value given name */
                    103: 
                    104: extern db_sym_t        db_search_symbol(/* db_expr_t, db_strategy_t, int* */);
                    105:                                        /* find symbol given value */
                    106: 
                    107: extern void    db_symbol_values(/* db_sym_t, char**, db_expr_t* */);
                    108:                                        /* return name and value of symbol */
                    109: 
                    110: #define db_find_sym_and_offset(val,namep,offp) \
                    111:        db_symbol_values(db_search_symbol(val,DB_STGY_ANY,offp),namep,0)
                    112:                                        /* find name&value given approx val */
                    113: 
                    114: #define db_find_xtrn_sym_and_offset(val,namep,offp)    \
                    115:        db_symbol_values(db_search_symbol(val,DB_STGY_XTRN,offp),namep,0)
                    116:                                        /* ditto, but no locals */
                    117: 
                    118: extern int     db_eqname(/* char*, char*, char */);
                    119:                                        /* strcmp, modulo leading char */
                    120: 
                    121: extern void    db_printsym(/* db_expr_t, db_strategy_t */);
                    122:                                        /* print closest symbol to a value */

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