xref: /freebsd/sys/ddb/db_sym.h (revision 62cfcf62f627e5093fb37026a6d8c98e4d2ef04c)
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 #endif /* !_DDB_DB_SYM_H_ */
109