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1 /* |
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2 |
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3 Copyright (C) 2000,2002,2004,2005 Silicon Graphics, Inc. All Rights Reserved. |
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4 Portions Copyright 2007 Sun Microsystems, Inc. All rights reserved. |
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5 |
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6 This program is free software; you can redistribute it and/or modify it |
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7 under the terms of version 2.1 of the GNU Lesser General Public License |
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8 as published by the Free Software Foundation. |
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9 |
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10 This program is distributed in the hope that it would be useful, but |
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11 WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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13 |
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14 Further, this software is distributed without any warranty that it is |
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15 free of the rightful claim of any third person regarding infringement |
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16 or the like. Any license provided herein, whether implied or |
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17 otherwise, applies only to this software file. Patent licenses, if |
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18 any, provided herein do not apply to combinations of this program with |
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19 other software, or any other product whatsoever. |
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20 |
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21 You should have received a copy of the GNU Lesser General Public |
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22 License along with this program; if not, write the Free Software |
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23 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston MA 02110-1301, |
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24 USA. |
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25 |
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26 Contact information: Silicon Graphics, Inc., 1500 Crittenden Lane, |
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27 Mountain View, CA 94043, or: |
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28 |
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29 http://www.sgi.com |
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30 |
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31 For further information regarding this notice, see: |
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32 |
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33 http://oss.sgi.com/projects/GenInfo/NoticeExplan |
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34 |
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35 */ |
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36 |
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37 |
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38 |
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39 #include "config.h" |
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40 #include "dwarf_incl.h" |
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41 #include "dwarf_die_deliv.h" |
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42 |
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43 int |
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44 dwarf_hasform(Dwarf_Attribute attr, |
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45 Dwarf_Half form, |
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46 Dwarf_Bool * return_bool, Dwarf_Error * error) |
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47 { |
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48 Dwarf_CU_Context cu_context; |
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49 |
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50 if (attr == NULL) { |
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51 _dwarf_error(NULL, error, DW_DLE_ATTR_NULL); |
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52 return (DW_DLV_ERROR); |
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53 } |
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54 |
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55 cu_context = attr->ar_cu_context; |
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56 if (cu_context == NULL) { |
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57 _dwarf_error(NULL, error, DW_DLE_ATTR_NO_CU_CONTEXT); |
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58 return (DW_DLV_ERROR); |
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59 } |
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60 |
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61 if (cu_context->cc_dbg == NULL) { |
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62 _dwarf_error(NULL, error, DW_DLE_ATTR_DBG_NULL); |
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63 return (DW_DLV_ERROR); |
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64 } |
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65 |
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66 *return_bool = (attr->ar_attribute_form == form); |
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67 return DW_DLV_OK; |
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68 } |
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69 |
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70 /* Not often called, we do not worry about efficiency here. |
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71 The dwarf_whatform() call does the sanity checks for us. |
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72 */ |
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73 int |
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74 dwarf_whatform_direct(Dwarf_Attribute attr, |
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75 Dwarf_Half * return_form, Dwarf_Error * error) |
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76 { |
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77 int res = dwarf_whatform(attr, return_form, error); |
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78 |
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79 if (res != DW_DLV_OK) { |
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80 return res; |
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81 } |
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82 |
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83 *return_form = attr->ar_attribute_form_direct; |
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84 return (DW_DLV_OK); |
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85 } |
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86 void * |
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87 dwarf_uncompress_integer_block( |
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88 Dwarf_Debug dbg, |
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89 Dwarf_Bool unit_is_signed, |
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90 Dwarf_Small unit_length_in_bits, |
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91 void* input_block, |
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92 Dwarf_Unsigned input_length_in_bytes, |
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93 Dwarf_Unsigned* output_length_in_units_ptr, |
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94 Dwarf_Error* error |
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95 ) |
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96 { |
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97 Dwarf_Unsigned output_length_in_units; |
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98 void * output_block; |
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99 int i; |
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100 char * ptr; |
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101 int remain; |
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102 Dwarf_sfixed * array; |
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103 |
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104 if (dbg == NULL) { |
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105 _dwarf_error(NULL, error, DW_DLE_DBG_NULL); |
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106 return((void *)DW_DLV_BADADDR); |
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107 } |
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108 |
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109 if (unit_is_signed == false || |
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110 unit_length_in_bits != 32 || |
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111 input_block == NULL || |
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112 input_length_in_bytes == 0 || |
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113 output_length_in_units_ptr == NULL) { |
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114 |
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115 _dwarf_error(NULL, error, DW_DLE_BADBITC); |
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116 return ((void *) DW_DLV_BADADDR); |
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117 } |
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118 |
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119 /* At this point we assume the format is: signed 32 bit */ |
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120 |
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121 /* first uncompress everything to find the total size. */ |
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122 |
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123 output_length_in_units = 0; |
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124 remain = input_length_in_bytes; |
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125 ptr = input_block; |
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126 while (remain > 0) { |
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127 Dwarf_Signed num; |
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128 Dwarf_Word len; |
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129 num = _dwarf_decode_s_leb128((unsigned char *)ptr, &len); |
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130 ptr += len; |
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131 remain -= len; |
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132 output_length_in_units++; |
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133 } |
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134 |
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135 if (remain != 0) { |
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136 _dwarf_error(NULL, error, DW_DLE_ALLOC_FAIL); |
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137 return((void *)DW_DLV_BADADDR); |
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138 } |
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139 |
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140 /* then alloc */ |
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141 |
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142 output_block = (void *) |
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143 _dwarf_get_alloc(dbg, |
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144 DW_DLA_STRING, |
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145 output_length_in_units * (unit_length_in_bits / 8)); |
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146 if (output_block == NULL) { |
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147 _dwarf_error(dbg, error, DW_DLE_ALLOC_FAIL); |
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148 return((void*)DW_DLV_BADADDR); |
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149 } |
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150 |
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151 /* then uncompress again and copy into new buffer */ |
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152 |
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153 array = (Dwarf_sfixed *) output_block; |
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154 remain = input_length_in_bytes; |
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155 ptr = input_block; |
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156 for (i=0; i<output_length_in_units && remain>0; i++) { |
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157 Dwarf_Signed num; |
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158 Dwarf_Word len; |
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159 num = _dwarf_decode_s_leb128((unsigned char *)ptr, &len); |
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160 ptr += len; |
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161 remain -= len; |
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162 array[i] = num; |
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163 } |
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164 |
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165 if (remain != 0) { |
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166 dwarf_dealloc(dbg, (unsigned char *)output_block, DW_DLA_STRING); |
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167 _dwarf_error(dbg, error, DW_DLE_ALLOC_FAIL); |
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168 return((Dwarf_P_Attribute)DW_DLV_BADADDR); |
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169 } |
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170 |
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171 *output_length_in_units_ptr = output_length_in_units; |
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172 return output_block; |
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173 } |
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174 |
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175 void |
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176 dwarf_dealloc_uncompressed_block(Dwarf_Debug dbg, void * space) |
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177 { |
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178 dwarf_dealloc(dbg, space, DW_DLA_STRING); |
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179 } |
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180 |
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181 |
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182 int |
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183 dwarf_whatform(Dwarf_Attribute attr, |
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184 Dwarf_Half * return_form, Dwarf_Error * error) |
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185 { |
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186 Dwarf_CU_Context cu_context; |
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187 |
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188 if (attr == NULL) { |
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189 _dwarf_error(NULL, error, DW_DLE_ATTR_NULL); |
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190 return (DW_DLV_ERROR); |
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191 } |
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192 |
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193 cu_context = attr->ar_cu_context; |
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194 if (cu_context == NULL) { |
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195 _dwarf_error(NULL, error, DW_DLE_ATTR_NO_CU_CONTEXT); |
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196 return (DW_DLV_ERROR); |
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197 } |
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198 |
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199 if (cu_context->cc_dbg == NULL) { |
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200 _dwarf_error(NULL, error, DW_DLE_ATTR_DBG_NULL); |
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201 return (DW_DLV_ERROR); |
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202 } |
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203 |
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204 *return_form = attr->ar_attribute_form; |
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205 return (DW_DLV_OK); |
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206 } |
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207 |
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208 |
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209 /* |
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210 This function is analogous to dwarf_whatform. |
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211 It returns the attribute in attr instead of |
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212 the form. |
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213 */ |
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214 int |
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215 dwarf_whatattr(Dwarf_Attribute attr, |
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216 Dwarf_Half * return_attr, Dwarf_Error * error) |
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217 { |
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218 Dwarf_CU_Context cu_context; |
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219 |
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220 if (attr == NULL) { |
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221 _dwarf_error(NULL, error, DW_DLE_ATTR_NULL); |
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222 return (DW_DLV_ERROR); |
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223 } |
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224 |
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225 cu_context = attr->ar_cu_context; |
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226 if (cu_context == NULL) { |
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227 _dwarf_error(NULL, error, DW_DLE_ATTR_NO_CU_CONTEXT); |
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228 return (DW_DLV_ERROR); |
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229 } |
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230 |
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231 if (cu_context->cc_dbg == NULL) { |
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232 _dwarf_error(NULL, error, DW_DLE_ATTR_DBG_NULL); |
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233 return (DW_DLV_ERROR); |
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234 } |
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235 |
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236 *return_attr = (attr->ar_attribute); |
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237 return DW_DLV_OK; |
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238 } |
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239 |
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240 |
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241 /* |
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242 DW_FORM_ref_addr is considered an incorrect form |
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243 for this call because this function returns an |
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244 offset within the local CU thru the pointer. |
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245 |
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246 DW_FORM_ref_addr is a global-offset into the debug_info section. |
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247 A DW_FORM_ref_addr cannot be returned by this interface: |
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248 see dwarf_global_formref(); |
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249 |
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250 DW_FORM_ref_addr has a value which was documented in |
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251 DWARF2 as address-size but which was always an offset |
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252 so should have always been offset size (wording |
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253 corrected in DWARF3). |
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254 |
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255 */ |
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256 int |
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257 dwarf_formref(Dwarf_Attribute attr, |
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258 Dwarf_Off * ret_offset, Dwarf_Error * error) |
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259 { |
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260 Dwarf_Debug dbg; |
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261 Dwarf_Unsigned offset; |
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262 Dwarf_CU_Context cu_context; |
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263 |
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264 |
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265 if (attr == NULL) { |
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266 _dwarf_error(NULL, error, DW_DLE_ATTR_NULL); |
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267 return (DW_DLV_ERROR); |
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268 } |
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269 |
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270 cu_context = attr->ar_cu_context; |
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271 if (cu_context == NULL) { |
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272 _dwarf_error(NULL, error, DW_DLE_ATTR_NO_CU_CONTEXT); |
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273 return (DW_DLV_ERROR); |
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274 } |
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275 |
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276 if (cu_context->cc_dbg == NULL) { |
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277 _dwarf_error(NULL, error, DW_DLE_ATTR_DBG_NULL); |
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278 return (DW_DLV_ERROR); |
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279 } |
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280 dbg = cu_context->cc_dbg; |
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281 |
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282 switch (attr->ar_attribute_form) { |
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283 |
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284 case DW_FORM_ref1: |
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285 offset = *(Dwarf_Small *) attr->ar_debug_info_ptr; |
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286 break; |
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287 |
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288 case DW_FORM_ref2: |
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289 READ_UNALIGNED(dbg, offset, Dwarf_Unsigned, |
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290 attr->ar_debug_info_ptr, sizeof(Dwarf_Half)); |
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291 break; |
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292 |
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293 case DW_FORM_ref4: |
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294 READ_UNALIGNED(dbg, offset, Dwarf_Unsigned, |
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295 attr->ar_debug_info_ptr, sizeof(Dwarf_ufixed)); |
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296 break; |
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297 |
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298 case DW_FORM_ref8: |
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299 READ_UNALIGNED(dbg, offset, Dwarf_Unsigned, |
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300 attr->ar_debug_info_ptr, sizeof(Dwarf_Unsigned)); |
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301 break; |
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302 |
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303 case DW_FORM_ref_udata: |
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304 offset = _dwarf_decode_u_leb128(attr->ar_debug_info_ptr, NULL); |
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305 break; |
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306 |
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307 default: |
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308 _dwarf_error(dbg, error, DW_DLE_BAD_REF_FORM); |
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309 return (DW_DLV_ERROR); |
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310 } |
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311 |
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312 /* Check that offset is within current cu portion of .debug_info. */ |
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313 |
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314 if (offset >= cu_context->cc_length + |
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315 cu_context->cc_length_size + cu_context->cc_extension_size) { |
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316 _dwarf_error(dbg, error, DW_DLE_ATTR_FORM_OFFSET_BAD); |
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317 return (DW_DLV_ERROR); |
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318 } |
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319 |
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320 *ret_offset = (offset); |
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321 return DW_DLV_OK; |
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322 } |
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323 |
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324 /* |
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325 Since this returns section-relative debug_info offsets, |
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326 this can represent all REFERENCE forms correctly |
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327 and allows all forms. |
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328 |
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329 DW_FORM_ref_addr has a value which was documented in |
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330 DWARF2 as address-size but which was always an offset |
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331 so should have always been offset size (wording |
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332 corrected in DWARF3). |
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333 |
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334 */ |
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335 int |
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336 dwarf_global_formref(Dwarf_Attribute attr, |
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337 Dwarf_Off * ret_offset, Dwarf_Error * error) |
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338 { |
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339 Dwarf_Debug dbg; |
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340 Dwarf_Unsigned offset; |
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341 Dwarf_Addr ref_addr; |
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342 Dwarf_CU_Context cu_context; |
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343 |
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344 if (attr == NULL) { |
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345 _dwarf_error(NULL, error, DW_DLE_ATTR_NULL); |
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346 return (DW_DLV_ERROR); |
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347 } |
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348 |
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349 cu_context = attr->ar_cu_context; |
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350 if (cu_context == NULL) { |
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351 _dwarf_error(NULL, error, DW_DLE_ATTR_NO_CU_CONTEXT); |
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352 return (DW_DLV_ERROR); |
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353 } |
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354 |
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355 if (cu_context->cc_dbg == NULL) { |
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356 _dwarf_error(NULL, error, DW_DLE_ATTR_DBG_NULL); |
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357 return (DW_DLV_ERROR); |
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358 } |
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359 dbg = cu_context->cc_dbg; |
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360 |
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361 switch (attr->ar_attribute_form) { |
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362 |
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363 case DW_FORM_ref1: |
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364 offset = *(Dwarf_Small *) attr->ar_debug_info_ptr; |
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365 goto fixoffset; |
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366 |
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367 case DW_FORM_ref2: |
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368 READ_UNALIGNED(dbg, offset, Dwarf_Unsigned, |
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369 attr->ar_debug_info_ptr, sizeof(Dwarf_Half)); |
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370 goto fixoffset; |
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371 |
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372 case DW_FORM_ref4: |
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373 READ_UNALIGNED(dbg, offset, Dwarf_Unsigned, |
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374 attr->ar_debug_info_ptr, sizeof(Dwarf_ufixed)); |
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375 goto fixoffset; |
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376 |
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377 case DW_FORM_ref8: |
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378 READ_UNALIGNED(dbg, offset, Dwarf_Unsigned, |
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379 attr->ar_debug_info_ptr, sizeof(Dwarf_Unsigned)); |
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380 goto fixoffset; |
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381 |
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382 case DW_FORM_ref_udata: |
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383 offset = _dwarf_decode_u_leb128(attr->ar_debug_info_ptr, NULL); |
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384 |
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385 fixoffset: /* we have a local offset, make it |
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386 global */ |
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387 |
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388 /* check legality of offset */ |
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389 if (offset >= cu_context->cc_length + |
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390 cu_context->cc_length_size + |
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391 cu_context->cc_extension_size) { |
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392 _dwarf_error(dbg, error, DW_DLE_ATTR_FORM_OFFSET_BAD); |
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393 return (DW_DLV_ERROR); |
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394 } |
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395 |
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396 /* globalize the offset */ |
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397 offset += cu_context->cc_debug_info_offset; |
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398 break; |
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399 |
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400 case DW_FORM_ref_addr: |
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401 /* This offset is defined to be debug_info global already, so |
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402 use this value unaltered. */ |
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403 READ_UNALIGNED(dbg, ref_addr, Dwarf_Addr, |
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404 attr->ar_debug_info_ptr, |
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405 cu_context->cc_length_size); |
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406 offset = ref_addr; |
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407 break; |
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408 default: |
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409 _dwarf_error(dbg, error, DW_DLE_BAD_REF_FORM); |
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410 return (DW_DLV_ERROR); |
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411 } |
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412 |
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413 /* Check that offset is within current cu portion of .debug_info. */ |
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414 |
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415 *ret_offset = (offset); |
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416 return DW_DLV_OK; |
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417 } |
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418 |
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419 |
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420 int |
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421 dwarf_formaddr(Dwarf_Attribute attr, |
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422 Dwarf_Addr * return_addr, Dwarf_Error * error) |
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423 { |
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424 Dwarf_Debug dbg; |
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425 Dwarf_Addr ret_addr; |
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426 Dwarf_CU_Context cu_context; |
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427 |
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428 if (attr == NULL) { |
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429 _dwarf_error(NULL, error, DW_DLE_ATTR_NULL); |
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430 return (DW_DLV_ERROR); |
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431 } |
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432 |
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433 cu_context = attr->ar_cu_context; |
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434 if (cu_context == NULL) { |
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435 _dwarf_error(NULL, error, DW_DLE_ATTR_NO_CU_CONTEXT); |
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436 return (DW_DLV_ERROR); |
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437 } |
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438 |
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439 if (cu_context->cc_dbg == NULL) { |
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440 _dwarf_error(NULL, error, DW_DLE_ATTR_DBG_NULL); |
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441 return (DW_DLV_ERROR); |
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442 } |
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443 dbg = cu_context->cc_dbg; |
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444 |
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445 if (attr->ar_attribute_form == DW_FORM_addr |
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446 /* || attr->ar_attribute_form == DW_FORM_ref_addr Allowance of |
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447 DW_FORM_ref_addr was a mistake. The value returned in that |
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448 case is NOT an address it is a global debug_info offset (ie, |
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449 not CU-relative offset within the CU in debug_info). The |
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450 Dwarf document refers to it as an address (misleadingly) in |
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451 sec 6.5.4 where it describes the reference form. It is |
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452 address-sized so that the linker can easily update it, but |
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453 it is a reference inside the debug_info section. No longer |
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454 allowed. */ |
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455 ) { |
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456 |
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457 READ_UNALIGNED(dbg, ret_addr, Dwarf_Addr, |
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458 attr->ar_debug_info_ptr, dbg->de_pointer_size); |
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459 *return_addr = ret_addr; |
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460 return (DW_DLV_OK); |
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461 } |
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462 |
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463 _dwarf_error(dbg, error, DW_DLE_ATTR_FORM_BAD); |
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464 return (DW_DLV_ERROR); |
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465 } |
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466 |
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467 |
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468 int |
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469 dwarf_formflag(Dwarf_Attribute attr, |
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470 Dwarf_Bool * ret_bool, Dwarf_Error * error) |
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471 { |
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472 Dwarf_CU_Context cu_context; |
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473 |
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474 if (attr == NULL) { |
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475 _dwarf_error(NULL, error, DW_DLE_ATTR_NULL); |
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476 return (DW_DLV_ERROR); |
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477 } |
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478 |
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479 cu_context = attr->ar_cu_context; |
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480 if (cu_context == NULL) { |
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481 _dwarf_error(NULL, error, DW_DLE_ATTR_NO_CU_CONTEXT); |
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482 return (DW_DLV_ERROR); |
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483 } |
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484 |
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485 if (cu_context->cc_dbg == NULL) { |
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486 _dwarf_error(NULL, error, DW_DLE_ATTR_DBG_NULL); |
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487 return (DW_DLV_ERROR); |
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488 } |
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489 |
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490 if (attr->ar_attribute_form == DW_FORM_flag) { |
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491 *ret_bool = (*(Dwarf_Small *) attr->ar_debug_info_ptr != 0); |
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492 return (DW_DLV_OK); |
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493 } |
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494 _dwarf_error(cu_context->cc_dbg, error, DW_DLE_ATTR_FORM_BAD); |
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495 return (DW_DLV_ERROR); |
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496 } |
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497 |
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498 |
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499 int |
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500 dwarf_formudata(Dwarf_Attribute attr, |
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501 Dwarf_Unsigned * return_uval, Dwarf_Error * error) |
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502 { |
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503 Dwarf_Unsigned ret_value; |
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504 Dwarf_Debug dbg; |
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505 Dwarf_CU_Context cu_context; |
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506 |
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507 if (attr == NULL) { |
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508 _dwarf_error(NULL, error, DW_DLE_ATTR_NULL); |
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509 return (DW_DLV_ERROR); |
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510 } |
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511 |
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512 |
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513 cu_context = attr->ar_cu_context; |
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514 if (cu_context == NULL) { |
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515 _dwarf_error(NULL, error, DW_DLE_ATTR_NO_CU_CONTEXT); |
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516 return (DW_DLV_ERROR); |
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517 } |
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518 |
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519 dbg = cu_context->cc_dbg; |
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520 if (dbg == NULL) { |
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521 _dwarf_error(NULL, error, DW_DLE_ATTR_DBG_NULL); |
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522 return (DW_DLV_ERROR); |
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523 } |
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524 |
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525 switch (attr->ar_attribute_form) { |
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526 |
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527 case DW_FORM_data1: |
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528 READ_UNALIGNED(dbg, ret_value, Dwarf_Unsigned, |
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529 attr->ar_debug_info_ptr, sizeof(Dwarf_Small)); |
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530 *return_uval = ret_value; |
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531 return DW_DLV_OK; |
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532 |
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533 /* READ_UNALIGNED does the right thing as it reads |
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534 the right number bits and generates host order. |
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535 So we can just assign to *return_uval. */ |
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536 case DW_FORM_data2:{ |
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537 READ_UNALIGNED(dbg, ret_value, Dwarf_Unsigned, |
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538 attr->ar_debug_info_ptr, sizeof(Dwarf_Half)); |
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539 *return_uval = ret_value; |
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540 return DW_DLV_OK; |
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541 } |
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542 |
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543 case DW_FORM_data4:{ |
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544 READ_UNALIGNED(dbg, ret_value, Dwarf_Unsigned, |
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545 attr->ar_debug_info_ptr, |
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546 sizeof(Dwarf_ufixed)); |
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547 *return_uval = ret_value; |
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548 return DW_DLV_OK; |
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549 } |
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550 |
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551 case DW_FORM_data8:{ |
|
552 READ_UNALIGNED(dbg, ret_value, Dwarf_Unsigned, |
|
553 attr->ar_debug_info_ptr, |
|
554 sizeof(Dwarf_Unsigned)); |
|
555 *return_uval = ret_value; |
|
556 return DW_DLV_OK; |
|
557 } |
|
558 |
|
559 case DW_FORM_udata: |
|
560 ret_value = |
|
561 (_dwarf_decode_u_leb128(attr->ar_debug_info_ptr, NULL)); |
|
562 *return_uval = ret_value; |
|
563 return DW_DLV_OK; |
|
564 |
|
565 |
|
566 /* see bug 583450. We do not allow reading sdata from a udata |
|
567 value. Caller can retry, calling sdata */ |
|
568 |
|
569 |
|
570 default: |
|
571 break; |
|
572 } |
|
573 _dwarf_error(dbg, error, DW_DLE_ATTR_FORM_BAD); |
|
574 return (DW_DLV_ERROR); |
|
575 } |
|
576 |
|
577 |
|
578 int |
|
579 dwarf_formsdata(Dwarf_Attribute attr, |
|
580 Dwarf_Signed * return_sval, Dwarf_Error * error) |
|
581 { |
|
582 Dwarf_Signed ret_value; |
|
583 Dwarf_Debug dbg; |
|
584 Dwarf_CU_Context cu_context; |
|
585 |
|
586 if (attr == NULL) { |
|
587 _dwarf_error(NULL, error, DW_DLE_ATTR_NULL); |
|
588 return (DW_DLV_ERROR); |
|
589 } |
|
590 |
|
591 cu_context = attr->ar_cu_context; |
|
592 if (cu_context == NULL) { |
|
593 _dwarf_error(NULL, error, DW_DLE_ATTR_NO_CU_CONTEXT); |
|
594 return (DW_DLV_ERROR); |
|
595 } |
|
596 |
|
597 dbg = cu_context->cc_dbg; |
|
598 if (dbg == NULL) { |
|
599 _dwarf_error(NULL, error, DW_DLE_ATTR_DBG_NULL); |
|
600 return (DW_DLV_ERROR); |
|
601 } |
|
602 |
|
603 switch (attr->ar_attribute_form) { |
|
604 |
|
605 case DW_FORM_data1: |
|
606 *return_sval = (*(Dwarf_Sbyte *) attr->ar_debug_info_ptr); |
|
607 return DW_DLV_OK; |
|
608 |
|
609 /* READ_UNALIGNED does not sign extend. |
|
610 So we have to use a cast to get the |
|
611 value sign extended in the right way for each case. */ |
|
612 case DW_FORM_data2:{ |
|
613 READ_UNALIGNED(dbg, ret_value, Dwarf_Signed, |
|
614 attr->ar_debug_info_ptr, |
|
615 sizeof(Dwarf_Shalf)); |
|
616 *return_sval = (Dwarf_Shalf) ret_value; |
|
617 return DW_DLV_OK; |
|
618 |
|
619 } |
|
620 |
|
621 case DW_FORM_data4:{ |
|
622 READ_UNALIGNED(dbg, ret_value, Dwarf_Signed, |
|
623 attr->ar_debug_info_ptr, |
|
624 sizeof(Dwarf_sfixed)); |
|
625 *return_sval = (Dwarf_sfixed) ret_value; |
|
626 return DW_DLV_OK; |
|
627 } |
|
628 |
|
629 case DW_FORM_data8:{ |
|
630 READ_UNALIGNED(dbg, ret_value, Dwarf_Signed, |
|
631 attr->ar_debug_info_ptr, |
|
632 sizeof(Dwarf_Signed)); |
|
633 *return_sval = (Dwarf_Signed) ret_value; |
|
634 return DW_DLV_OK; |
|
635 } |
|
636 |
|
637 case DW_FORM_sdata: |
|
638 ret_value = |
|
639 (_dwarf_decode_s_leb128(attr->ar_debug_info_ptr, NULL)); |
|
640 *return_sval = ret_value; |
|
641 return DW_DLV_OK; |
|
642 |
|
643 |
|
644 /* see bug 583450. We do not allow reading sdata from a udata |
|
645 value. Caller can retry, calling sdata */ |
|
646 |
|
647 |
|
648 default: |
|
649 break; |
|
650 } |
|
651 _dwarf_error(dbg, error, DW_DLE_ATTR_FORM_BAD); |
|
652 return (DW_DLV_ERROR); |
|
653 } |
|
654 |
|
655 |
|
656 int |
|
657 dwarf_formblock(Dwarf_Attribute attr, |
|
658 Dwarf_Block ** return_block, Dwarf_Error * error) |
|
659 { |
|
660 Dwarf_CU_Context cu_context; |
|
661 Dwarf_Debug dbg; |
|
662 Dwarf_Unsigned length; |
|
663 Dwarf_Small *data; |
|
664 Dwarf_Word leb128_length; |
|
665 Dwarf_Block *ret_block; |
|
666 |
|
667 if (attr == NULL) { |
|
668 _dwarf_error(NULL, error, DW_DLE_ATTR_NULL); |
|
669 return (DW_DLV_ERROR); |
|
670 } |
|
671 |
|
672 cu_context = attr->ar_cu_context; |
|
673 if (cu_context == NULL) { |
|
674 _dwarf_error(NULL, error, DW_DLE_ATTR_NO_CU_CONTEXT); |
|
675 return (DW_DLV_ERROR); |
|
676 } |
|
677 |
|
678 if (cu_context->cc_dbg == NULL) { |
|
679 _dwarf_error(NULL, error, DW_DLE_ATTR_DBG_NULL); |
|
680 return (DW_DLV_ERROR); |
|
681 } |
|
682 dbg = cu_context->cc_dbg; |
|
683 |
|
684 switch (attr->ar_attribute_form) { |
|
685 |
|
686 case DW_FORM_block1: |
|
687 length = *(Dwarf_Small *) attr->ar_debug_info_ptr; |
|
688 data = attr->ar_debug_info_ptr + sizeof(Dwarf_Small); |
|
689 break; |
|
690 |
|
691 case DW_FORM_block2: |
|
692 READ_UNALIGNED(dbg, length, Dwarf_Unsigned, |
|
693 attr->ar_debug_info_ptr, sizeof(Dwarf_Half)); |
|
694 data = attr->ar_debug_info_ptr + sizeof(Dwarf_Half); |
|
695 break; |
|
696 |
|
697 case DW_FORM_block4: |
|
698 READ_UNALIGNED(dbg, length, Dwarf_Unsigned, |
|
699 attr->ar_debug_info_ptr, sizeof(Dwarf_ufixed)); |
|
700 data = attr->ar_debug_info_ptr + sizeof(Dwarf_ufixed); |
|
701 break; |
|
702 |
|
703 case DW_FORM_block: |
|
704 length = _dwarf_decode_u_leb128(attr->ar_debug_info_ptr, |
|
705 &leb128_length); |
|
706 data = attr->ar_debug_info_ptr + leb128_length; |
|
707 break; |
|
708 |
|
709 default: |
|
710 _dwarf_error(cu_context->cc_dbg, error, DW_DLE_ATTR_FORM_BAD); |
|
711 return (DW_DLV_ERROR); |
|
712 } |
|
713 |
|
714 /* Check that block lies within current cu in .debug_info. */ |
|
715 if (attr->ar_debug_info_ptr + length >= |
|
716 dbg->de_debug_info + cu_context->cc_debug_info_offset + |
|
717 cu_context->cc_length + cu_context->cc_length_size + |
|
718 cu_context->cc_extension_size) { |
|
719 _dwarf_error(dbg, error, DW_DLE_ATTR_FORM_SIZE_BAD); |
|
720 return (DW_DLV_ERROR); |
|
721 } |
|
722 |
|
723 ret_block = (Dwarf_Block *) _dwarf_get_alloc(dbg, DW_DLA_BLOCK, 1); |
|
724 if (ret_block == NULL) { |
|
725 _dwarf_error(dbg, error, DW_DLE_ALLOC_FAIL); |
|
726 return (DW_DLV_ERROR); |
|
727 } |
|
728 |
|
729 ret_block->bl_len = length; |
|
730 ret_block->bl_data = (Dwarf_Ptr) data; |
|
731 ret_block->bl_from_loclist = 0; |
|
732 ret_block->bl_section_offset = data - dbg->de_debug_info; |
|
733 |
|
734 |
|
735 *return_block = ret_block; |
|
736 return (DW_DLV_OK); |
|
737 } |
|
738 |
|
739 |
|
740 /* Contrary to long standing documentation, |
|
741 The string pointer returned thru return_str must |
|
742 never have dwarf_dealloc() applied to it. |
|
743 Documentation fixed July 2005. |
|
744 */ |
|
745 int |
|
746 dwarf_formstring(Dwarf_Attribute attr, |
|
747 char **return_str, Dwarf_Error * error) |
|
748 { |
|
749 Dwarf_CU_Context cu_context; |
|
750 Dwarf_Debug dbg; |
|
751 Dwarf_Unsigned offset; |
|
752 int res; |
|
753 |
|
754 if (attr == NULL) { |
|
755 _dwarf_error(NULL, error, DW_DLE_ATTR_NULL); |
|
756 return (DW_DLV_ERROR); |
|
757 } |
|
758 |
|
759 cu_context = attr->ar_cu_context; |
|
760 if (cu_context == NULL) { |
|
761 _dwarf_error(NULL, error, DW_DLE_ATTR_NO_CU_CONTEXT); |
|
762 return (DW_DLV_ERROR); |
|
763 } |
|
764 |
|
765 if (cu_context->cc_dbg == NULL) { |
|
766 _dwarf_error(NULL, error, DW_DLE_ATTR_DBG_NULL); |
|
767 return (DW_DLV_ERROR); |
|
768 } |
|
769 dbg = cu_context->cc_dbg; |
|
770 |
|
771 if (attr->ar_attribute_form == DW_FORM_string) { |
|
772 |
|
773 void *begin = attr->ar_debug_info_ptr; |
|
774 |
|
775 if (0 == dbg->de_assume_string_in_bounds) { |
|
776 /* Check that string lies within current cu in .debug_info. |
|
777 */ |
|
778 void *end = dbg->de_debug_info + |
|
779 cu_context->cc_debug_info_offset + |
|
780 cu_context->cc_length + cu_context->cc_length_size + |
|
781 cu_context->cc_extension_size; |
|
782 if (0 == _dwarf_string_valid(begin, end)) { |
|
783 _dwarf_error(dbg, error, DW_DLE_ATTR_FORM_SIZE_BAD); |
|
784 return (DW_DLV_ERROR); |
|
785 } |
|
786 } |
|
787 *return_str = (char *) (begin); |
|
788 return DW_DLV_OK; |
|
789 } |
|
790 |
|
791 if (attr->ar_attribute_form == DW_FORM_strp) { |
|
792 READ_UNALIGNED(dbg, offset, Dwarf_Unsigned, |
|
793 attr->ar_debug_info_ptr, |
|
794 cu_context->cc_length_size); |
|
795 |
|
796 res = |
|
797 _dwarf_load_section(dbg, |
|
798 dbg->de_debug_str_index, |
|
799 &dbg->de_debug_str, error); |
|
800 if (res != DW_DLV_OK) { |
|
801 return res; |
|
802 } |
|
803 |
|
804 *return_str = (char *) (dbg->de_debug_str + offset); |
|
805 return DW_DLV_OK; |
|
806 } |
|
807 |
|
808 _dwarf_error(dbg, error, DW_DLE_ATTR_FORM_BAD); |
|
809 return (DW_DLV_ERROR); |
|
810 } |