1 | /*- |
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2 | * Copyright (c) 2006,2008-2009,2011 Joseph Koshy |
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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 <sys/cdefs.h> |
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28 | |
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29 | #include <libelf.h> |
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30 | |
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31 | #include "_libelf.h" |
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32 | |
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33 | LIBELF_VCSID("$Id: elf_flag.c 1918 2011-09-22 10:42:06Z jkoshy $"); |
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34 | |
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35 | unsigned int |
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36 | elf_flagarhdr(Elf_Arhdr *a, Elf_Cmd c, unsigned int flags) |
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37 | { |
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38 | unsigned int r; |
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39 | |
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40 | if (a == NULL) |
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41 | return (0); |
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42 | |
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43 | if ((c != ELF_C_SET && c != ELF_C_CLR) || |
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44 | (flags & ~ELF_F_DIRTY) != 0) { |
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45 | LIBELF_SET_ERROR(ARGUMENT, 0); |
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46 | return (0); |
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47 | } |
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48 | |
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49 | if (c == ELF_C_SET) |
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50 | r = a->ar_flags |= flags; |
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51 | else |
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52 | r = a->ar_flags &= ~flags; |
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53 | |
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54 | return (r & LIBELF_F_API_MASK); |
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55 | } |
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56 | |
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57 | unsigned int |
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58 | elf_flagdata(Elf_Data *d, Elf_Cmd c, unsigned int flags) |
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59 | { |
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60 | unsigned int r; |
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61 | |
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62 | if (d == NULL) |
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63 | return (0); |
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64 | |
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65 | if ((c != ELF_C_SET && c != ELF_C_CLR) || |
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66 | (flags & ~ELF_F_DIRTY) != 0) { |
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67 | LIBELF_SET_ERROR(ARGUMENT, 0); |
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68 | return (0); |
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69 | } |
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70 | |
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71 | if (c == ELF_C_SET) |
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72 | r = d->d_flags |= flags; |
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73 | else |
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74 | r = d->d_flags &= ~flags; |
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75 | |
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76 | return (r & LIBELF_F_API_MASK); |
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77 | } |
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78 | |
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79 | unsigned int |
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80 | elf_flagehdr(Elf *e, Elf_Cmd c, unsigned int flags) |
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81 | { |
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82 | int ec; |
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83 | void *ehdr; |
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84 | |
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85 | if (e == NULL) |
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86 | return (0); |
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87 | |
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88 | if ((c != ELF_C_SET && c != ELF_C_CLR) || |
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89 | (e->e_kind != ELF_K_ELF) || (flags & ~ELF_F_DIRTY) != 0 || |
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90 | ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) { |
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91 | LIBELF_SET_ERROR(ARGUMENT, 0); |
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92 | return (0); |
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93 | } |
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94 | |
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95 | if (ec == ELFCLASS32) |
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96 | ehdr = e->e_u.e_elf.e_ehdr.e_ehdr32; |
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97 | else |
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98 | ehdr = e->e_u.e_elf.e_ehdr.e_ehdr64; |
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99 | |
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100 | if (ehdr == NULL) { |
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101 | LIBELF_SET_ERROR(SEQUENCE, 0); |
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102 | return (0); |
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103 | } |
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104 | |
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105 | return (elf_flagelf(e, c, flags)); |
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106 | } |
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107 | |
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108 | unsigned int |
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109 | elf_flagelf(Elf *e, Elf_Cmd c, unsigned int flags) |
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110 | { |
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111 | int r; |
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112 | |
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113 | if (e == NULL) |
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114 | return (0); |
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115 | |
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116 | if ((c != ELF_C_SET && c != ELF_C_CLR) || |
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117 | (e->e_kind != ELF_K_ELF) || |
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118 | (flags & ~(ELF_F_ARCHIVE | ELF_F_ARCHIVE_SYSV | |
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119 | ELF_F_DIRTY | ELF_F_LAYOUT)) != 0) { |
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120 | LIBELF_SET_ERROR(ARGUMENT, 0); |
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121 | return (0); |
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122 | } |
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123 | |
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124 | if ((flags & ELF_F_ARCHIVE_SYSV) && (flags & ELF_F_ARCHIVE) == 0) { |
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125 | LIBELF_SET_ERROR(ARGUMENT, 0); |
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126 | return (0); |
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127 | } |
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128 | |
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129 | if ((flags & ELF_F_ARCHIVE) && e->e_cmd != ELF_C_WRITE) { |
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130 | LIBELF_SET_ERROR(MODE, 0); |
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131 | return (0); |
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132 | } |
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133 | |
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134 | if (c == ELF_C_SET) |
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135 | r = e->e_flags |= flags; |
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136 | else |
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137 | r = e->e_flags &= ~flags; |
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138 | return (r & LIBELF_F_API_MASK); |
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139 | } |
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140 | |
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141 | unsigned int |
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142 | elf_flagphdr(Elf *e, Elf_Cmd c, unsigned int flags) |
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143 | { |
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144 | int ec; |
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145 | void *phdr; |
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146 | |
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147 | if (e == NULL) |
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148 | return (0); |
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149 | |
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150 | if ((c != ELF_C_SET && c != ELF_C_CLR) || |
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151 | (e->e_kind != ELF_K_ELF) || (flags & ~ELF_F_DIRTY) != 0 || |
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152 | ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) { |
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153 | LIBELF_SET_ERROR(ARGUMENT, 0); |
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154 | return (0); |
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155 | } |
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156 | |
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157 | if (ec == ELFCLASS32) |
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158 | phdr = e->e_u.e_elf.e_phdr.e_phdr32; |
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159 | else |
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160 | phdr = e->e_u.e_elf.e_phdr.e_phdr64; |
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161 | |
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162 | if (phdr == NULL) { |
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163 | LIBELF_SET_ERROR(SEQUENCE, 0); |
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164 | return (0); |
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165 | } |
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166 | |
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167 | return (elf_flagelf(e, c, flags)); |
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168 | } |
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169 | |
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170 | unsigned int |
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171 | elf_flagscn(Elf_Scn *s, Elf_Cmd c, unsigned int flags) |
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172 | { |
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173 | int r; |
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174 | |
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175 | if (s == NULL) |
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176 | return (0); |
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177 | |
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178 | if ((c != ELF_C_SET && c != ELF_C_CLR) || |
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179 | (flags & ~ELF_F_DIRTY) != 0) { |
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180 | LIBELF_SET_ERROR(ARGUMENT, 0); |
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181 | return (0); |
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182 | } |
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183 | |
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184 | if (c == ELF_C_SET) |
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185 | r = s->s_flags |= flags; |
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186 | else |
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187 | r = s->s_flags &= ~flags; |
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188 | return (r & LIBELF_F_API_MASK); |
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189 | } |
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190 | |
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191 | unsigned int |
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192 | elf_flagshdr(Elf_Scn *s, Elf_Cmd c, unsigned int flags) |
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193 | { |
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194 | return (elf_flagscn(s, c, flags)); |
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195 | } |
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