external/bsd/elftoolchain/dist/libdwarf/dwarf_arange.c

   1 /*      $NetBSD: dwarf_arange.c,v 1.2 2014/03/09 16:58:03 christos Exp $        */
   2
   3 /*-
   4  * Copyright (c) 2009,2011 Kai Wang
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include "_libdwarf.h"
  30
  31 __RCSID("$NetBSD: dwarf_arange.c,v 1.2 2014/03/09 16:58:03 christos Exp $");
  32 ELFTC_VCSID("Id: dwarf_arange.c 2072 2011-10-27 03:26:49Z jkoshy ");
  33
  34 int
  35 dwarf_get_aranges(Dwarf_Debug dbg, Dwarf_Arange **arlist,
  36     Dwarf_Signed *ret_arange_cnt, Dwarf_Error *error)
  37 {
  38
  39         if (dbg == NULL || arlist == NULL || ret_arange_cnt == NULL) {
  40                 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
  41                 return (DW_DLV_ERROR);
  42         }
  43
  44         if (dbg->dbg_arange_cnt == 0) {
  45                 if (_dwarf_arange_init(dbg, error) != DW_DLE_NONE)
  46                         return (DW_DLV_ERROR);
  47                 if (dbg->dbg_arange_cnt == 0) {
  48                         DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
  49                         return (DW_DLV_NO_ENTRY);
  50                 }
  51         }
  52
  53         assert(dbg->dbg_arange_array != NULL);
  54
  55         *arlist = dbg->dbg_arange_array;
  56         *ret_arange_cnt = dbg->dbg_arange_cnt;
  57
  58         return (DW_DLV_OK);
  59 }
  60
  61 int
  62 dwarf_get_arange(Dwarf_Arange *arlist, Dwarf_Unsigned arange_cnt,
  63     Dwarf_Addr addr, Dwarf_Arange *ret_arange, Dwarf_Error *error)
  64 {
  65         Dwarf_Arange ar;
  66         Dwarf_Debug dbg;
  67         int i;
  68
  69         if (arlist == NULL) {
  70                 DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
  71                 return (DW_DLV_ERROR);
  72         }
  73
  74         dbg = (*arlist)->ar_as->as_cu->cu_dbg;
  75
  76         if (ret_arange == NULL || arange_cnt == 0) {
  77                 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
  78                 return (DW_DLV_ERROR);
  79         }
  80
  81         for (i = 0; (Dwarf_Unsigned)i < arange_cnt; i++) {
  82                 ar = arlist[i];
  83                 if (addr >= ar->ar_address && addr < ar->ar_address +
  84                     ar->ar_range) {
  85                         *ret_arange = ar;
  86                         return (DW_DLV_OK);
  87                 }
  88         }
  89
  90         DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
  91
  92         return (DW_DLV_NO_ENTRY);
  93 }
  94
  95 int
  96 dwarf_get_cu_die_offset(Dwarf_Arange ar, Dwarf_Off *ret_offset,
  97     Dwarf_Error *error)
  98 {
  99         Dwarf_CU cu;
 100         Dwarf_ArangeSet as;
 101
 102         if (ar == NULL) {
 103                 DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
 104                 return (DW_DLV_ERROR);
 105         }
 106
 107         as = ar->ar_as;
 108         assert(as != NULL);
 109         cu = as->as_cu;
 110         assert(cu != NULL);
 111
 112         if (ret_offset == NULL) {
 113                 DWARF_SET_ERROR(cu->cu_dbg, error, DW_DLE_ARGUMENT);
 114                 return (DW_DLV_ERROR);
 115         }
 116
 117         *ret_offset = cu->cu_1st_offset;
 118
 119         return (DW_DLV_OK);
 120 }
 121
 122 int
 123 dwarf_get_arange_cu_header_offset(Dwarf_Arange ar, Dwarf_Off *ret_offset,
 124     Dwarf_Error *error)
 125 {
 126         Dwarf_ArangeSet as;
 127
 128         if (ar == NULL) {
 129                 DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
 130                 return (DW_DLV_ERROR);
 131         }
 132
 133         as = ar->ar_as;
 134         assert(as != NULL);
 135
 136         if (ret_offset == NULL) {
 137                 DWARF_SET_ERROR(as->as_cu->cu_dbg, error, DW_DLE_ARGUMENT);
 138                 return (DW_DLV_ERROR);
 139         }
 140
 141         *ret_offset = as->as_cu_offset;
 142
 143         return (DW_DLV_OK);
 144 }
 145
 146 int
 147 dwarf_get_arange_info(Dwarf_Arange ar, Dwarf_Addr *start,
 148     Dwarf_Unsigned *length, Dwarf_Off *cu_die_offset, Dwarf_Error *error)
 149 {
 150         Dwarf_CU cu;
 151         Dwarf_ArangeSet as;
 152
 153         if (ar == NULL) {
 154                 DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
 155                 return (DW_DLV_ERROR);
 156         }
 157
 158         as = ar->ar_as;
 159         assert(as != NULL);
 160         cu = as->as_cu;
 161         assert(cu != NULL);
 162
 163         if (start == NULL || length == NULL ||
 164             cu_die_offset == NULL) {
 165                 DWARF_SET_ERROR(cu->cu_dbg, error, DW_DLE_ARGUMENT);
 166                 return (DW_DLV_ERROR);
 167         }
 168
 169         *start = ar->ar_address;
 170         *length = ar->ar_range;
 171         *cu_die_offset = cu->cu_1st_offset;
 172
 173         return (DW_DLV_OK);
 174 }