1 | /*- |
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2 | * Copyright (c) 2009,2011 Kai Wang |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * |
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14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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24 | * SUCH DAMAGE. |
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25 | */ |
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26 | |
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27 | #include "_libdwarf.h" |
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28 | |
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29 | ELFTC_VCSID("$Id: dwarf_abbrev.c 2072 2011-10-27 03:26:49Z jkoshy $"); |
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30 | |
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31 | int |
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32 | dwarf_get_abbrev(Dwarf_Debug dbg, Dwarf_Unsigned offset, |
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33 | Dwarf_Abbrev *return_abbrev, Dwarf_Unsigned *length, |
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34 | Dwarf_Unsigned *attr_count, Dwarf_Error *error) |
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35 | { |
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36 | Dwarf_Abbrev ab; |
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37 | int ret; |
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38 | |
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39 | if (dbg == NULL || return_abbrev == NULL || length == NULL || |
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40 | attr_count == NULL) { |
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41 | DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); |
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42 | return (DW_DLV_ERROR); |
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43 | } |
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44 | |
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45 | ret = _dwarf_abbrev_parse(dbg, NULL, &offset, &ab, error); |
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46 | if (ret != DW_DLE_NONE) { |
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47 | if (ret == DW_DLE_NO_ENTRY) { |
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48 | DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); |
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49 | return (DW_DLV_NO_ENTRY); |
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50 | } else |
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51 | return (DW_DLV_ERROR); |
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52 | } |
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53 | |
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54 | *return_abbrev = ab; |
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55 | *length = ab->ab_length; |
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56 | *attr_count = ab->ab_atnum; |
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57 | |
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58 | return (DW_DLV_OK); |
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59 | } |
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60 | |
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61 | int |
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62 | dwarf_get_abbrev_tag(Dwarf_Abbrev abbrev, Dwarf_Half *return_tag, |
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63 | Dwarf_Error *error) |
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64 | { |
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65 | |
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66 | if (abbrev == NULL || return_tag == NULL) { |
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67 | DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT); |
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68 | return (DW_DLV_ERROR); |
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69 | } |
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70 | |
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71 | *return_tag = (Dwarf_Half) abbrev->ab_tag; |
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72 | |
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73 | return (DW_DLV_OK); |
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74 | } |
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75 | |
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76 | int |
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77 | dwarf_get_abbrev_code(Dwarf_Abbrev abbrev, Dwarf_Unsigned *return_code, |
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78 | Dwarf_Error *error) |
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79 | { |
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80 | |
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81 | if (abbrev == NULL || return_code == NULL) { |
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82 | DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT); |
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83 | return (DW_DLV_ERROR); |
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84 | } |
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85 | |
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86 | *return_code = abbrev->ab_entry; |
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87 | |
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88 | return (DW_DLV_OK); |
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89 | } |
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90 | |
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91 | int |
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92 | dwarf_get_abbrev_children_flag(Dwarf_Abbrev abbrev, Dwarf_Signed *return_flag, |
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93 | Dwarf_Error *error) |
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94 | { |
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95 | |
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96 | if (abbrev == NULL || return_flag == NULL) { |
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97 | DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT); |
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98 | return (DW_DLV_ERROR); |
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99 | } |
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100 | |
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101 | *return_flag = (Dwarf_Signed) abbrev->ab_children; |
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102 | |
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103 | return (DW_DLV_OK); |
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104 | } |
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105 | |
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106 | int |
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107 | dwarf_get_abbrev_entry(Dwarf_Abbrev abbrev, Dwarf_Signed ndx, |
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108 | Dwarf_Half *attr_num, Dwarf_Signed *form, Dwarf_Off *offset, |
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109 | Dwarf_Error *error) |
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110 | { |
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111 | Dwarf_AttrDef ad; |
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112 | int i; |
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113 | |
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114 | if (abbrev == NULL || attr_num == NULL || form == NULL || |
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115 | offset == NULL) { |
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116 | DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT); |
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117 | return (DW_DLV_ERROR); |
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118 | } |
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119 | |
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120 | if (ndx < 0 || (uint64_t) ndx >= abbrev->ab_atnum) { |
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121 | DWARF_SET_ERROR(NULL, error, DW_DLE_NO_ENTRY); |
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122 | return (DW_DLV_NO_ENTRY); |
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123 | } |
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124 | |
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125 | ad = STAILQ_FIRST(&abbrev->ab_attrdef); |
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126 | for (i = 0; i < ndx && ad != NULL; i++) |
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127 | ad = STAILQ_NEXT(ad, ad_next); |
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128 | |
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129 | assert(ad != NULL); |
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130 | |
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131 | *attr_num = ad->ad_attrib; |
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132 | *form = ad->ad_form; |
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133 | *offset = ad->ad_offset; |
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134 | |
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135 | return (DW_DLV_OK); |
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136 | } |
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