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1 /* |
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2 * verneed.h - copy versioning information. |
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3 * Copyright (C) 2001 - 2006 Michael Riepe |
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4 * |
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5 * This library is free software; you can redistribute it and/or |
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6 * modify it under the terms of the GNU Library General Public |
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7 * License as published by the Free Software Foundation; either |
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8 * version 2 of the License, or (at your option) any later version. |
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9 * |
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10 * This library is distributed in the hope that it will be useful, |
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 * Library General Public License for more details. |
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14 * |
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15 * You should have received a copy of the GNU Library General Public |
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16 * License along with this library; if not, write to the Free Software |
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17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 */ |
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19 |
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20 #ifndef lint |
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21 static const char verneed_h_rcsid[] = "@(#) $Id: verneed.h,v 1.12 2006/07/27 22:40:03 michael Exp $"; |
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22 #endif /* lint */ |
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23 |
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24 #if VER_NEED_CURRENT != 1 |
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25 #error libelf currently does not support VER_NEED_CURRENT != 1 |
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26 #endif /* VER_NEED_CURRENT != 1 */ |
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27 |
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28 #if TOFILE |
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29 |
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30 static void |
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31 __store_vernaux(vernaux_ftype *dst, const vernaux_mtype *src, unsigned enc) { |
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32 if (enc == ELFDATA2LSB) { |
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33 __store_u32L(dst->vna_hash, src->vna_hash); |
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34 __store_u16L(dst->vna_flags, src->vna_flags); |
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35 __store_u16L(dst->vna_other, src->vna_other); |
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36 __store_u32L(dst->vna_name, src->vna_name); |
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37 __store_u32L(dst->vna_next, src->vna_next); |
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38 } |
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39 else { |
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40 __store_u32M(dst->vna_hash, src->vna_hash); |
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41 __store_u16M(dst->vna_flags, src->vna_flags); |
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42 __store_u16M(dst->vna_other, src->vna_other); |
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43 __store_u32M(dst->vna_name, src->vna_name); |
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44 __store_u32M(dst->vna_next, src->vna_next); |
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45 } |
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46 } |
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47 |
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48 static void |
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49 __store_verneed(verneed_ftype *dst, const verneed_mtype *src, unsigned enc) { |
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50 if (enc == ELFDATA2LSB) { |
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51 __store_u16L(dst->vn_version, src->vn_version); |
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52 __store_u16L(dst->vn_cnt, src->vn_cnt); |
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53 __store_u32L(dst->vn_file, src->vn_file); |
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54 __store_u32L(dst->vn_aux, src->vn_aux); |
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55 __store_u32L(dst->vn_next, src->vn_next); |
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56 } |
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57 else { |
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58 __store_u16M(dst->vn_version, src->vn_version); |
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59 __store_u16M(dst->vn_cnt, src->vn_cnt); |
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60 __store_u32M(dst->vn_file, src->vn_file); |
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61 __store_u32M(dst->vn_aux, src->vn_aux); |
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62 __store_u32M(dst->vn_next, src->vn_next); |
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63 } |
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64 } |
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65 |
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66 typedef vernaux_mtype vernaux_stype; |
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67 typedef vernaux_ftype vernaux_dtype; |
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68 typedef verneed_mtype verneed_stype; |
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69 typedef verneed_ftype verneed_dtype; |
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70 typedef align_mtype verneed_atype; |
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71 |
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72 #define copy_vernaux_srctotmp(d, s, e) (*(d) = *(s)) |
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73 #define copy_vernaux_tmptodst(d, s, e) __store_vernaux((d), (s), (e)) |
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74 #define copy_verneed_srctotmp(d, s, e) (*(d) = *(s)) |
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75 #define copy_verneed_tmptodst(d, s, e) __store_verneed((d), (s), (e)) |
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76 |
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77 #define translator_suffix _tof |
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78 |
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79 #else /* TOFILE */ |
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80 |
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81 static void |
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82 __load_vernaux(vernaux_mtype *dst, const vernaux_ftype *src, unsigned enc) { |
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83 if (enc == ELFDATA2LSB) { |
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84 dst->vna_hash = __load_u32L(src->vna_hash); |
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85 dst->vna_flags = __load_u16L(src->vna_flags); |
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86 dst->vna_other = __load_u16L(src->vna_other); |
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87 dst->vna_name = __load_u32L(src->vna_name); |
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88 dst->vna_next = __load_u32L(src->vna_next); |
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89 } |
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90 else { |
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91 dst->vna_hash = __load_u32M(src->vna_hash); |
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92 dst->vna_flags = __load_u16M(src->vna_flags); |
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93 dst->vna_other = __load_u16M(src->vna_other); |
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94 dst->vna_name = __load_u32M(src->vna_name); |
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95 dst->vna_next = __load_u32M(src->vna_next); |
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96 } |
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97 } |
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98 |
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99 static void |
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100 __load_verneed(verneed_mtype *dst, const verneed_ftype *src, unsigned enc) { |
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101 if (enc == ELFDATA2LSB) { |
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102 dst->vn_version = __load_u16L(src->vn_version); |
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103 dst->vn_cnt = __load_u16L(src->vn_cnt); |
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104 dst->vn_file = __load_u32L(src->vn_file); |
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105 dst->vn_aux = __load_u32L(src->vn_aux); |
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106 dst->vn_next = __load_u32L(src->vn_next); |
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107 } |
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108 else { |
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109 dst->vn_version = __load_u16M(src->vn_version); |
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110 dst->vn_cnt = __load_u16M(src->vn_cnt); |
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111 dst->vn_file = __load_u32M(src->vn_file); |
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112 dst->vn_aux = __load_u32M(src->vn_aux); |
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113 dst->vn_next = __load_u32M(src->vn_next); |
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114 } |
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115 } |
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116 |
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117 typedef vernaux_ftype vernaux_stype; |
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118 typedef vernaux_mtype vernaux_dtype; |
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119 typedef verneed_ftype verneed_stype; |
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120 typedef verneed_mtype verneed_dtype; |
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121 typedef align_ftype verneed_atype; |
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122 |
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123 #define copy_vernaux_srctotmp(d, s, e) __load_vernaux((d), (s), (e)) |
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124 #define copy_vernaux_tmptodst(d, s, e) (*(d) = *(s)) |
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125 #define copy_verneed_srctotmp(d, s, e) __load_verneed((d), (s), (e)) |
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126 #define copy_verneed_tmptodst(d, s, e) (*(d) = *(s)) |
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127 |
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128 #define translator_suffix _tom |
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129 |
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130 #endif /* TOFILE */ |
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131 |
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132 #define cat3(a,b,c) a##b##c |
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133 #define xlt3(p,e,s) cat3(p,e,s) |
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134 #define xltprefix(x) xlt3(x,_,class_suffix) |
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135 #define translator(x,e) xlt3(xltprefix(_elf_##x),e,translator_suffix) |
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136 |
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137 static size_t |
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138 xlt_verneed(unsigned char *dst, const unsigned char *src, size_t n, unsigned enc) { |
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139 size_t off; |
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140 |
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141 if (sizeof(verneed_stype) != sizeof(verneed_dtype) |
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142 || sizeof(vernaux_stype) != sizeof(vernaux_dtype)) { |
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143 /* never happens for ELF v1 and Verneed v1 */ |
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144 seterr(ERROR_UNIMPLEMENTED); |
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145 return (size_t)-1; |
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146 } |
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147 /* size translation shortcut */ |
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148 if (dst == NULL) { |
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149 return n; |
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150 } |
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151 if (src == NULL) { |
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152 seterr(ERROR_NULLBUF); |
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153 return (size_t)-1; |
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154 } |
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155 off = 0; |
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156 while (off + sizeof(verneed_stype) <= n) { |
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157 const verneed_stype *svn; |
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158 verneed_dtype *dvn; |
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159 verneed_mtype vn; |
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160 size_t acount; |
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161 size_t aoff; |
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162 |
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163 /* |
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164 * check for proper alignment |
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165 */ |
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166 if (off % sizeof(verneed_atype)) { |
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167 seterr(ERROR_VERNEED_FORMAT); |
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168 return (size_t)-1; |
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169 } |
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170 /* |
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171 * copy and check src |
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172 */ |
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173 svn = (verneed_stype*)(src + off); |
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174 dvn = (verneed_dtype*)(dst + off); |
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175 copy_verneed_srctotmp(&vn, svn, enc); |
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176 if (vn.vn_version < 1 |
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177 || vn.vn_version > VER_NEED_CURRENT) { |
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178 seterr(ERROR_VERNEED_VERSION); |
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179 return (size_t)-1; |
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180 } |
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181 if (vn.vn_cnt < 1 |
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182 || vn.vn_aux == 0) { |
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183 seterr(ERROR_VERNEED_FORMAT); |
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184 return (size_t)-1; |
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185 } |
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186 copy_verneed_tmptodst(dvn, &vn, enc); |
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187 /* |
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188 * copy aux array |
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189 */ |
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190 aoff = off + vn.vn_aux; |
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191 for (acount = 0; acount < vn.vn_cnt; acount++) { |
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192 const vernaux_stype *svna; |
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193 vernaux_dtype *dvna; |
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194 vernaux_mtype vna; |
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195 |
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196 /* |
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197 * are we still inside the buffer limits? |
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198 */ |
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199 if (aoff + sizeof(vernaux_stype) > n) { |
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200 break; |
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201 } |
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202 /* |
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203 * check for proper alignment |
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204 */ |
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205 if (aoff % sizeof(verneed_atype)) { |
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206 seterr(ERROR_VERNEED_FORMAT); |
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207 return (size_t)-1; |
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208 } |
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209 /* |
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210 * copy and check src |
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211 */ |
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212 svna = (vernaux_stype*)(src + aoff); |
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213 dvna = (vernaux_dtype*)(dst + aoff); |
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214 copy_vernaux_srctotmp(&vna, svna, enc); |
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215 copy_vernaux_tmptodst(dvna, &vna, enc); |
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216 /* |
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217 * advance to next vernaux |
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218 */ |
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219 if (vna.vna_next == 0) { |
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220 /* end of list */ |
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221 break; |
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222 } |
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223 aoff += vna.vna_next; |
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224 } |
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225 /* |
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226 * advance to next verneed |
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227 */ |
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228 if (vn.vn_next == 0) { |
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229 /* end of list */ |
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230 break; |
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231 } |
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232 off += vn.vn_next; |
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233 } |
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234 return n; |
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235 } |
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236 |
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237 size_t |
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238 translator(verneed,L11)(unsigned char *dst, const unsigned char *src, size_t n) { |
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239 return xlt_verneed(dst, src, n, ELFDATA2LSB); |
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240 } |
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241 |
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242 size_t |
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243 translator(verneed,M11)(unsigned char *dst, const unsigned char *src, size_t n) { |
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244 return xlt_verneed(dst, src, n, ELFDATA2MSB); |
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245 } |