1 | /*- |
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2 | * Copyright (c) 2010 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: libdwarf_sections.c 3041 2014-05-18 15:11:03Z kaiwang27 $"); |
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30 | |
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31 | #define _SECTION_INIT_SIZE 128 |
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32 | |
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33 | int |
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34 | _dwarf_section_init(Dwarf_P_Debug dbg, Dwarf_P_Section *dsp, const char *name, |
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35 | int pseudo, Dwarf_Error *error) |
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36 | { |
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37 | Dwarf_P_Section ds; |
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38 | |
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39 | assert(dbg != NULL && dsp != NULL && name != NULL); |
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40 | |
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41 | if ((ds = calloc(1, sizeof(struct _Dwarf_P_Section))) == NULL) { |
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42 | DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY); |
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43 | return (DW_DLE_MEMORY); |
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44 | } |
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45 | |
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46 | if ((ds->ds_name = strdup(name)) == NULL) { |
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47 | free(ds); |
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48 | DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY); |
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49 | return (DW_DLE_MEMORY); |
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50 | } |
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51 | |
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52 | if (!pseudo) { |
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53 | ds->ds_cap = _SECTION_INIT_SIZE; |
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54 | if ((ds->ds_data = malloc((size_t) ds->ds_cap)) == NULL) { |
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55 | free(ds->ds_name); |
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56 | free(ds); |
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57 | DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY); |
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58 | return (DW_DLE_MEMORY); |
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59 | } |
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60 | STAILQ_INSERT_TAIL(&dbg->dbgp_seclist, ds, ds_next); |
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61 | dbg->dbgp_seccnt++; |
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62 | } |
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63 | |
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64 | *dsp = ds; |
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65 | |
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66 | return (DW_DLE_NONE); |
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67 | } |
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68 | |
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69 | void |
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70 | _dwarf_section_free(Dwarf_P_Debug dbg, Dwarf_P_Section *dsp) |
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71 | { |
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72 | Dwarf_P_Section ds, tds; |
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73 | |
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74 | assert(dbg != NULL && dsp != NULL); |
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75 | |
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76 | if (*dsp == NULL) |
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77 | return; |
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78 | |
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79 | STAILQ_FOREACH_SAFE(ds, &dbg->dbgp_seclist, ds_next, tds) { |
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80 | if (ds == *dsp) { |
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81 | STAILQ_REMOVE(&dbg->dbgp_seclist, ds, _Dwarf_P_Section, |
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82 | ds_next); |
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83 | dbg->dbgp_seccnt--; |
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84 | break; |
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85 | } |
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86 | } |
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87 | ds = *dsp; |
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88 | if (ds->ds_name) |
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89 | free(ds->ds_name); |
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90 | if (ds->ds_data) |
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91 | free(ds->ds_data); |
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92 | free(ds); |
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93 | *dsp = NULL; |
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94 | } |
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95 | |
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96 | int |
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97 | _dwarf_pro_callback(Dwarf_P_Debug dbg, char *name, int size, |
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98 | Dwarf_Unsigned type, Dwarf_Unsigned flags, Dwarf_Unsigned link, |
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99 | Dwarf_Unsigned info, Dwarf_Unsigned *symndx, int *error) |
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100 | { |
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101 | int e, ret, isymndx; |
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102 | |
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103 | assert(dbg != NULL && name != NULL && symndx != NULL); |
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104 | |
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105 | if (dbg->dbgp_func_b) |
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106 | ret = dbg->dbgp_func_b(name, size, type, flags, link, info, |
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107 | symndx, &e); |
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108 | else { |
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109 | ret = dbg->dbgp_func(name, size, type, flags, link, info, |
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110 | &isymndx, &e); |
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111 | *symndx = isymndx; |
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112 | } |
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113 | if (ret < 0) { |
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114 | if (error) |
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115 | *error = e; |
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116 | } |
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117 | |
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118 | return (ret); |
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119 | } |
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120 | |
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121 | int |
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122 | _dwarf_section_callback(Dwarf_P_Debug dbg, Dwarf_P_Section ds, |
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123 | Dwarf_Unsigned type, Dwarf_Unsigned flags, Dwarf_Unsigned link, |
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124 | Dwarf_Unsigned info, Dwarf_Error *error) |
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125 | { |
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126 | int ret, ndx; |
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127 | |
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128 | ndx = _dwarf_pro_callback(dbg, ds->ds_name, (int) ds->ds_size, |
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129 | type, flags, link, info, &ds->ds_symndx, NULL); |
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130 | if (ndx < 0) { |
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131 | ret = DW_DLE_ELF_SECT_ERR; |
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132 | DWARF_SET_ERROR(dbg, error, ret); |
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133 | return (ret); |
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134 | } |
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135 | ds->ds_ndx = ndx; |
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136 | |
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137 | return (DW_DLE_NONE); |
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138 | } |
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139 | |
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140 | int |
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141 | _dwarf_generate_sections(Dwarf_P_Debug dbg, Dwarf_Error *error) |
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142 | { |
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143 | int ret; |
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144 | |
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145 | /* Produce .debug_info section. */ |
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146 | if ((ret = _dwarf_info_gen(dbg, error)) != DW_DLE_NONE) |
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147 | return (ret); |
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148 | |
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149 | /* Produce .debug_abbrev section. */ |
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150 | if ((ret = _dwarf_abbrev_gen(dbg, error)) != DW_DLE_NONE) |
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151 | return (ret); |
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152 | |
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153 | /* Produce .debug_line section. */ |
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154 | if ((ret = _dwarf_lineno_gen(dbg, error)) != DW_DLE_NONE) |
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155 | return (ret); |
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156 | |
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157 | /* Produce .debug_frame section. */ |
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158 | if ((ret = _dwarf_frame_gen(dbg, error)) != DW_DLE_NONE) |
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159 | return (ret); |
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160 | |
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161 | /* Produce .debug_aranges section. */ |
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162 | if ((ret = _dwarf_arange_gen(dbg, error)) != DW_DLE_NONE) |
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163 | return (ret); |
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164 | |
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165 | /* Produce .debug_macinfo section. */ |
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166 | if ((ret = _dwarf_macinfo_gen(dbg, error)) != DW_DLE_NONE) |
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167 | return (ret); |
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168 | |
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169 | /* Produce .debug_pubnames section. */ |
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170 | if ((ret = _dwarf_nametbl_gen(dbg, ".debug_pubnames", dbg->dbgp_pubs, |
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171 | error)) != DW_DLE_NONE) |
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172 | return (ret); |
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173 | |
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174 | /* Produce .debug_weaknames section. */ |
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175 | if ((ret = _dwarf_nametbl_gen(dbg, ".debug_weaknames", dbg->dbgp_weaks, |
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176 | error)) != DW_DLE_NONE) |
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177 | return (ret); |
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178 | |
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179 | /* Produce .debug_funcnames section. */ |
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180 | if ((ret = _dwarf_nametbl_gen(dbg, ".debug_funcnames", dbg->dbgp_funcs, |
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181 | error)) != DW_DLE_NONE) |
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182 | return (ret); |
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183 | |
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184 | /* Produce .debug_typenames section. */ |
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185 | if ((ret = _dwarf_nametbl_gen(dbg, ".debug_typenames", dbg->dbgp_types, |
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186 | error)) != DW_DLE_NONE) |
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187 | return (ret); |
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188 | |
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189 | /* Produce .debug_varnames section. */ |
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190 | if ((ret = _dwarf_nametbl_gen(dbg, ".debug_varnames", dbg->dbgp_vars, |
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191 | error)) != DW_DLE_NONE) |
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192 | return (ret); |
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193 | |
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194 | /* Produce .debug_str section. */ |
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195 | if ((ret = _dwarf_strtab_gen(dbg, error)) != DW_DLE_NONE) |
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196 | return (ret); |
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197 | |
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198 | /* Finally, update and generate all relocation sections. */ |
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199 | if ((ret = _dwarf_reloc_gen(dbg, error)) != DW_DLE_NONE) |
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200 | return (ret); |
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201 | |
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202 | /* Set section/relocation iterator to the first element. */ |
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203 | dbg->dbgp_secpos = STAILQ_FIRST(&dbg->dbgp_seclist); |
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204 | dbg->dbgp_drspos = STAILQ_FIRST(&dbg->dbgp_drslist); |
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205 | |
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206 | return (DW_DLE_NONE); |
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207 | } |
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208 | |
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209 | Dwarf_Section * |
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210 | _dwarf_find_section(Dwarf_Debug dbg, const char *name) |
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211 | { |
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212 | Dwarf_Section *ds; |
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213 | Dwarf_Half i; |
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214 | |
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215 | assert(dbg != NULL && name != NULL); |
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216 | |
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217 | for (i = 0; i < dbg->dbg_seccnt; i++) { |
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218 | ds = &dbg->dbg_section[i]; |
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219 | if (ds->ds_name != NULL && !strcmp(ds->ds_name, name)) |
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220 | return (ds); |
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221 | } |
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222 | |
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223 | return (NULL); |
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224 | } |
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225 | |
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226 | Dwarf_Section * |
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227 | _dwarf_find_next_types_section(Dwarf_Debug dbg, Dwarf_Section *ds) |
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228 | { |
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229 | |
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230 | assert(dbg != NULL); |
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231 | |
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232 | if (ds == NULL) |
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233 | return (_dwarf_find_section(dbg, ".debug_types")); |
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234 | |
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235 | assert(ds->ds_name != NULL); |
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236 | |
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237 | do { |
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238 | ds++; |
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239 | if (ds->ds_name != NULL && |
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240 | !strcmp(ds->ds_name, ".debug_types")) |
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241 | return (ds); |
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242 | } while (ds->ds_name != NULL); |
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243 | |
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244 | return (NULL); |
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245 | } |
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246 | |
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247 | Dwarf_P_Section |
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248 | _dwarf_pro_find_section(Dwarf_P_Debug dbg, const char *name) |
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249 | { |
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250 | Dwarf_P_Section ds; |
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251 | |
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252 | assert(dbg != NULL && name != NULL); |
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253 | |
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254 | STAILQ_FOREACH(ds, &dbg->dbgp_seclist, ds_next) { |
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255 | if (ds->ds_name != NULL && !strcmp(ds->ds_name ,name)) |
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256 | return (ds); |
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257 | } |
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258 | |
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259 | return (NULL); |
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260 | } |
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261 | |
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262 | void |
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263 | _dwarf_section_cleanup(Dwarf_P_Debug dbg) |
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264 | { |
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265 | Dwarf_P_Section ds, tds; |
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266 | |
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267 | assert(dbg != NULL && dbg->dbg_mode == DW_DLC_WRITE); |
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268 | |
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269 | STAILQ_FOREACH_SAFE(ds, &dbg->dbgp_seclist, ds_next, tds) { |
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270 | STAILQ_REMOVE(&dbg->dbgp_seclist, ds, _Dwarf_P_Section, |
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271 | ds_next); |
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272 | if (ds->ds_name) |
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273 | free(ds->ds_name); |
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274 | if (ds->ds_data) |
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275 | free(ds->ds_data); |
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276 | free(ds); |
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277 | } |
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278 | dbg->dbgp_seccnt = 0; |
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279 | dbg->dbgp_secpos = 0; |
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280 | } |
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