Annotation of sys/ddb/db_sym.h, Revision 1.1.1.1
1.1 nbrk 1: /* $NetBSD: db_sym.h,v 1.13 2000/05/25 19:57:36 jhawk Exp $ */
2:
3: /*
4: * Mach Operating System
5: * Copyright (c) 1993,1992,1991,1990 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 "AS IS"
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 Mellon
26: * the rights to redistribute these changes.
27: *
28: * Author: Alessandro Forin, Carnegie Mellon University
29: * Date: 8/90
30: */
31:
32: /*
33: * This module can handle multiple symbol tables
34: */
35: typedef struct {
36: const char *name; /* symtab name */
37: char *start; /* symtab location */
38: char *end;
39: char *private; /* optional machdep pointer */
40: } db_symtab_t;
41:
42: extern db_symtab_t *db_last_symtab; /* where last symbol was found */
43:
44: /*
45: * Symbol representation is specific to the symtab style:
46: * BSD compilers use dbx' nlist, other compilers might use
47: * a different one
48: */
49: typedef char * db_sym_t; /* opaque handle on symbols */
50: #define DB_SYM_NULL ((db_sym_t)0)
51:
52: /*
53: * Non-stripped symbol tables will have duplicates, for instance
54: * the same string could match a parameter name, a local var, a
55: * global var, etc.
56: * We are most concern with the following matches.
57: */
58: typedef int db_strategy_t; /* search strategy */
59:
60: #define DB_STGY_ANY 0 /* anything goes */
61: #define DB_STGY_XTRN 1 /* only external symbols */
62: #define DB_STGY_PROC 2 /* only procedures */
63:
64:
65: /*
66: * Internal db_forall function calling convention:
67: *
68: * (*db_forall_func)(stab, sym, name, suffix, prefix, arg);
69: *
70: * stab is the symbol table, symbol the (opaque) symbol pointer,
71: * name the name of the symbol, suffix a string representing
72: * the type, prefix an initial ignorable function prefix (e.g. "_"
73: * in a.out), and arg an opaque argument to be passed in.
74: */
75: typedef void (db_forall_func_t)(db_symtab_t *, db_sym_t, char *, char *, int, void *);
76:
77: void X_db_forall(db_symtab_t *,
78: db_forall_func_t db_forall_func, void *);
79:
80: /*
81: * A symbol table may be in one of many formats. All symbol tables
82: * must be of the same format as the master kernel symbol table.
83: */
84: typedef struct {
85: const char *sym_format;
86: boolean_t (*sym_init)(int, void *, void *, const char *);
87: db_sym_t (*sym_lookup)(db_symtab_t *, char *);
88: db_sym_t (*sym_search)(db_symtab_t *, db_addr_t, db_strategy_t,
89: db_expr_t *);
90: void (*sym_value)(db_symtab_t *, db_sym_t, char **,
91: db_expr_t *);
92: boolean_t (*sym_line_at_pc)(db_symtab_t *, db_sym_t,
93: char **, int *, db_expr_t);
94: boolean_t (*sym_numargs)(db_symtab_t *, db_sym_t, int *,
95: char **);
96: void (*sym_forall)(db_symtab_t *,
97: db_forall_func_t *db_forall_func, void *);
98: } db_symformat_t;
99:
100: extern boolean_t db_qualify_ambiguous_names;
101: /* if TRUE, check across symbol tables
102: * for multiple occurrences of a name.
103: * Might slow down quite a bit */
104:
105: extern unsigned int db_maxoff; /* like gdb's "max-symbolic-offset" */
106: /*
107: * Functions exported by the symtable module
108: */
109: int db_add_symbol_table(char *, char *, const char *, char *);
110: /* extend the list of symbol tables */
111:
112: void db_del_symbol_table(char *);
113: /* remove a symbol table from list */
114:
115: boolean_t db_eqname(char *, char *, int);
116: /* strcmp, modulo leading char */
117:
118: int db_value_of_name(char *, db_expr_t *);
119: /* find symbol value given name */
120:
121: db_sym_t db_lookup(char *);
122:
123: void db_sifting(char *, int);
124: /* print partially matching symbol names */
125:
126: boolean_t db_symbol_is_ambiguous(db_sym_t);
127:
128: db_sym_t db_search_symbol(db_addr_t, db_strategy_t, db_expr_t *);
129: /* find symbol given value */
130:
131: void db_symbol_values(db_sym_t, char **, db_expr_t *);
132: /* return name and value of symbol */
133:
134: #define db_find_sym_and_offset(val,namep,offp) \
135: db_symbol_values(db_search_symbol(val,DB_STGY_ANY,offp),namep,0)
136: /* find name&value given approx val */
137:
138: #define db_find_xtrn_sym_and_offset(val,namep,offp) \
139: db_symbol_values(db_search_symbol(val,DB_STGY_XTRN,offp),namep,0)
140: /* ditto, but no locals */
141:
142: void db_printsym(db_expr_t, db_strategy_t, int (*)(const char *, ...));
143: /* print closest symbol to a value */
144:
145: boolean_t db_line_at_pc(db_sym_t, char **, int *, db_expr_t);
146:
147: int db_sym_numargs(db_sym_t, int *, char **);
148: char *db_qualify(db_sym_t, const char *);
149:
150: #ifdef DB_AOUT_SYMBOLS
151: extern db_symformat_t db_symformat_aout;
152: #endif
153: #ifdef DB_ELF_SYMBOLS
154: extern db_symformat_t db_symformat_elf;
155: #endif
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