sys/ddb/db_kld.c

   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  * $FreeBSD: src/sys/ddb/db_kld.c,v 1.9 2000/01/11 13:25:12 peter Exp $
  27  * $DragonFly: src/sys/ddb/db_kld.c,v 1.4 2005/12/23 21:35:44 swildner Exp $
  28  *      from db_aout.c,v 1.20 1998/06/07 17:09:36 dfr Exp
  29  */
  30
  31 /*
  32  *      Author: David B. Golub, Carnegie Mellon University
  33  *      Date:   7/90
  34  */
  35 /*
  36  * Symbol table routines for kld maintained kernels.
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/systm.h>
  41 #include <sys/linker.h>
  42
  43 #include <ddb/ddb.h>
  44 #include <ddb/db_sym.h>
  45
  46 c_db_sym_t
  47 X_db_lookup(db_symtab_t *stab, const char *symstr)
  48 {
  49         c_linker_sym_t sym;
  50
  51         if (linker_ddb_lookup(symstr, &sym) == 0)
  52             return (c_db_sym_t) sym;
  53         else
  54             return (c_db_sym_t) 0;
  55 }
  56
  57 /*
  58  * Parameters:
  59  *     diffp:   in/out
  60  */
  61 c_db_sym_t
  62 X_db_search_symbol(db_symtab_t *symtab, db_addr_t off, db_strategy_t strategy,
  63                    db_expr_t *diffp)
  64 {
  65         c_linker_sym_t sym;
  66         long diff;
  67
  68         if (linker_ddb_search_symbol((caddr_t) off, &sym, &diff) == 0) {
  69                 *diffp = (db_expr_t) diff;
  70                 return (c_db_sym_t) sym;
  71         }
  72
  73         return 0;
  74 }
  75
  76 /*
  77  * Return the name and value for a symbol.
  78  */
  79 void
  80 X_db_symbol_values(db_symtab_t *symtab, c_db_sym_t dbsym, const char **namep,
  81                    db_expr_t *valuep)
  82 {
  83         c_linker_sym_t sym = (c_linker_sym_t) dbsym;
  84         linker_symval_t symval;
  85
  86         linker_ddb_symbol_values(sym, &symval);
  87         if (namep)
  88             *namep = (const char*) symval.name;
  89         if (valuep)
  90             *valuep = (db_expr_t) symval.value;
  91 }
  92
  93
  94 boolean_t
  95 X_db_line_at_pc(db_symtab_t *symtab, c_db_sym_t cursym, char **filename,
  96                 int *linenum, db_expr_t off)
  97 {
  98         return FALSE;
  99 }
 100
 101 boolean_t
 102 X_db_sym_numargs(db_symtab_t *symtab, c_db_sym_t cursym, int *nargp,
 103                  char **argnamep)
 104 {
 105         return FALSE;
 106 }
 107
 108 /*
 109  * Initialization routine for a.out files.
 110  */
 111 void
 112 kdb_init(void)
 113 {
 114         db_add_symbol_table(0, 0, "kernel", 0);
 115 }