db_sym.h revision 623 
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 *	$Id$
27 */
28
29/*
30 * 	Author: Alessandro Forin, Carnegie Mellon University
31 *	Date:	8/90
32 */
33
34/*
35 * This module can handle multiple symbol tables
36 */
37typedef struct {
38	char		*name;		/* symtab name */
39	char		*start;		/* symtab location */
40	char		*end;
41	char		*private;	/* optional machdep pointer */
42} db_symtab_t;
43
44extern db_symtab_t	*db_last_symtab; /* where last symbol was found */
45
46/*
47 * Symbol representation is specific to the symtab style:
48 * BSD compilers use dbx' nlist, other compilers might use
49 * a different one
50 */
51typedef	char *		db_sym_t;	/* opaque handle on symbols */
52#define	DB_SYM_NULL	((db_sym_t)0)
53
54/*
55 * Non-stripped symbol tables will have duplicates, for instance
56 * the same string could match a parameter name, a local var, a
57 * global var, etc.
58 * We are most concern with the following matches.
59 */
60typedef int		db_strategy_t;	/* search strategy */
61
62#define	DB_STGY_ANY	0			/* anything goes */
63#define DB_STGY_XTRN	1			/* only external symbols */
64#define DB_STGY_PROC	2			/* only procedures */
65
66extern boolean_t	db_qualify_ambiguous_names;
67					/* if TRUE, check across symbol tables
68					 * for multiple occurrences of a name.
69					 * Might slow down quite a bit */
70
71/*
72 * Functions exported by the symtable module
73 */
74extern void	db_add_symbol_table();
75					/* extend the list of symbol tables */
76
77extern int	db_value_of_name(/* char*, db_expr_t* */);
78					/* find symbol value given name */
79
80extern db_sym_t	db_search_symbol(/* db_expr_t, db_strategy_t, int* */);
81					/* find symbol given value */
82
83extern void	db_symbol_values(/* db_sym_t, char**, db_expr_t* */);
84					/* return name and value of symbol */
85
86#define db_find_sym_and_offset(val,namep,offp)	\
87	db_symbol_values(db_search_symbol(val,DB_STGY_ANY,offp),namep,0)
88					/* find name&value given approx val */
89
90#define db_find_xtrn_sym_and_offset(val,namep,offp)	\
91	db_symbol_values(db_search_symbol(val,DB_STGY_XTRN,offp),namep,0)
92					/* ditto, but no locals */
93
94extern int	db_eqname(/* char*, char*, char */);
95					/* strcmp, modulo leading char */
96
97extern void	db_printsym(/* db_expr_t, db_strategy_t */);
98					/* print closest symbol to a value */
99