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  *      from db_aout.c,v 1.20 1998/06/07 17:09:36 dfr Exp
  28  */
  29
  30 /*
  31  *      Author: David B. Golub, Carnegie Mellon University
  32  *      Date:   7/90
  33  */
  34 /*
  35  * Symbol table routines for kld maintained kernels.
  36  */
  37
  38 #include <sys/param.h>
  39 #include <sys/systm.h>
  40 #include <sys/linker.h>
  41
  42 #include <ddb/ddb.h>
  43 #include <ddb/db_sym.h>
  44
  45 #if defined(__x86_64__)
  46 vm_offset_t    ksym_start, ksym_end;
  47 #endif
  48
  49 c_db_sym_t
  50 X_db_lookup(db_symtab_t *stab, const char *symstr)
  51 {
  52         c_linker_sym_t sym;
  53
  54         if (linker_ddb_lookup(symstr, &sym) == 0)
  55             return (c_db_sym_t) sym;
  56         else
  57             return (c_db_sym_t) 0;
  58 }
  59
  60 /*
  61  * Parameters:
  62  *     diffp:   in/out
  63  */
  64 c_db_sym_t
  65 X_db_search_symbol(db_symtab_t *symtab, db_addr_t off, db_strategy_t strategy,
  66                    db_expr_t *diffp)
  67 {
  68         c_linker_sym_t sym;
  69         long diff;
  70
  71         if (linker_ddb_search_symbol((caddr_t) off, &sym, &diff) == 0) {
  72                 *diffp = (db_expr_t) diff;
  73                 return (c_db_sym_t) sym;
  74         }
  75
  76         return 0;
  77 }
  78
  79 /*
  80  * Return the name and value for a symbol.
  81  */
  82 void
  83 X_db_symbol_values(db_symtab_t *symtab, c_db_sym_t dbsym, const char **namep,
  84                    db_expr_t *valuep)
  85 {
  86         c_linker_sym_t sym = (c_linker_sym_t) dbsym;
  87         linker_symval_t symval;
  88
  89         symval.name = NULL;
  90         symval.value = NULL;
  91         linker_ddb_symbol_values(sym, &symval);
  92         if (namep)
  93             *namep = (const char*) symval.name;
  94         if (valuep)
  95             *valuep = (db_expr_t) symval.value;
  96 }
  97
  98
  99 boolean_t
 100 X_db_line_at_pc(db_symtab_t *symtab, c_db_sym_t cursym, char **filename,
 101                 int *linenum, db_expr_t off)
 102 {
 103         return FALSE;
 104 }
 105
 106 boolean_t
 107 X_db_sym_numargs(db_symtab_t *symtab, c_db_sym_t cursym, int *nargp,
 108                  char **argnamep)
 109 {
 110         return FALSE;
 111 }
 112
 113 /*
 114  * Initialization routine for a.out files.
 115  */
 116 void
 117 kdb_init(void)
 118 {
 119         db_add_symbol_table(0, 0, "kernel", 0);
 120 }