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Rev | Author | Line No. | Line |
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5197 | serge | 1 | /* ELF attributes support (based on ARM EABI attributes). |
2 | Copyright 2005, 2006, 2007, 2009, 2010, 2012 |
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3 | Free Software Foundation, Inc. |
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4 | |||
5 | This file is part of BFD, the Binary File Descriptor library. |
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6 | |||
7 | This program is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU General Public License as published by |
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9 | the Free Software Foundation; either version 3 of the License, or |
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10 | (at your option) any later version. |
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11 | |||
12 | This program is distributed in the hope that it will be useful, |
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | GNU General Public License for more details. |
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16 | |||
17 | You should have received a copy of the GNU General Public License |
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18 | along with this program; if not, write to the Free Software |
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19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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20 | MA 02110-1301, USA. */ |
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21 | |||
22 | #include "sysdep.h" |
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23 | #include "bfd.h" |
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24 | #include "libiberty.h" |
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25 | #include "libbfd.h" |
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26 | #include "elf-bfd.h" |
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27 | |||
28 | /* Return the number of bytes needed by I in uleb128 format. */ |
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29 | static int |
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30 | uleb128_size (unsigned int i) |
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31 | { |
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32 | int size; |
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33 | size = 1; |
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34 | while (i >= 0x80) |
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35 | { |
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36 | i >>= 7; |
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37 | size++; |
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38 | } |
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39 | return size; |
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40 | } |
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41 | |||
42 | /* Return TRUE if the attribute has the default value (0/""). */ |
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43 | static bfd_boolean |
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44 | is_default_attr (obj_attribute *attr) |
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45 | { |
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46 | if (ATTR_TYPE_HAS_INT_VAL (attr->type) && attr->i != 0) |
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47 | return FALSE; |
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48 | if (ATTR_TYPE_HAS_STR_VAL (attr->type) && attr->s && *attr->s) |
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49 | return FALSE; |
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50 | if (ATTR_TYPE_HAS_NO_DEFAULT (attr->type)) |
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51 | return FALSE; |
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52 | |||
53 | return TRUE; |
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54 | } |
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55 | |||
56 | /* Return the size of a single attribute. */ |
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57 | static bfd_vma |
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58 | obj_attr_size (int tag, obj_attribute *attr) |
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59 | { |
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60 | bfd_vma size; |
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61 | |||
62 | if (is_default_attr (attr)) |
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63 | return 0; |
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64 | |||
65 | size = uleb128_size (tag); |
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66 | if (ATTR_TYPE_HAS_INT_VAL (attr->type)) |
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67 | size += uleb128_size (attr->i); |
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68 | if (ATTR_TYPE_HAS_STR_VAL (attr->type)) |
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69 | size += strlen ((char *)attr->s) + 1; |
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70 | return size; |
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71 | } |
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72 | |||
73 | /* Return the vendor name for a given object attributes section. */ |
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74 | static const char * |
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75 | vendor_obj_attr_name (bfd *abfd, int vendor) |
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76 | { |
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77 | return (vendor == OBJ_ATTR_PROC |
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78 | ? get_elf_backend_data (abfd)->obj_attrs_vendor |
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79 | : "gnu"); |
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80 | } |
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81 | |||
82 | /* Return the size of the object attributes section for VENDOR |
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83 | (OBJ_ATTR_PROC or OBJ_ATTR_GNU), or 0 if there are no attributes |
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84 | for that vendor to record and the vendor is OBJ_ATTR_GNU. */ |
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85 | static bfd_vma |
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86 | vendor_obj_attr_size (bfd *abfd, int vendor) |
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87 | { |
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88 | bfd_vma size; |
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89 | obj_attribute *attr; |
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90 | obj_attribute_list *list; |
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91 | int i; |
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92 | const char *vendor_name = vendor_obj_attr_name (abfd, vendor); |
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93 | |||
94 | if (!vendor_name) |
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95 | return 0; |
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96 | |||
97 | attr = elf_known_obj_attributes (abfd)[vendor]; |
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98 | size = 0; |
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99 | for (i = LEAST_KNOWN_OBJ_ATTRIBUTE; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++) |
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100 | size += obj_attr_size (i, &attr[i]); |
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101 | |||
102 | for (list = elf_other_obj_attributes (abfd)[vendor]; |
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103 | list; |
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104 | list = list->next) |
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105 | size += obj_attr_size (list->tag, &list->attr); |
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106 | |||
107 | /* |
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108 | return ((size || vendor == OBJ_ATTR_PROC) |
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109 | ? size + 10 + strlen (vendor_name) |
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110 | : 0); |
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111 | } |
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112 | |||
113 | /* Return the size of the object attributes section. */ |
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114 | bfd_vma |
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115 | bfd_elf_obj_attr_size (bfd *abfd) |
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116 | { |
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117 | bfd_vma size; |
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118 | |||
119 | size = vendor_obj_attr_size (abfd, OBJ_ATTR_PROC); |
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120 | size += vendor_obj_attr_size (abfd, OBJ_ATTR_GNU); |
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121 | |||
122 | /* 'A' |
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123 | return (size ? size + 1 : 0); |
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124 | } |
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125 | |||
126 | /* Write VAL in uleb128 format to P, returning a pointer to the |
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127 | following byte. */ |
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128 | static bfd_byte * |
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129 | write_uleb128 (bfd_byte *p, unsigned int val) |
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130 | { |
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131 | bfd_byte c; |
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132 | do |
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133 | { |
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134 | c = val & 0x7f; |
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135 | val >>= 7; |
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136 | if (val) |
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137 | c |= 0x80; |
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138 | *(p++) = c; |
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139 | } |
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140 | while (val); |
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141 | return p; |
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142 | } |
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143 | |||
144 | /* Write attribute ATTR to butter P, and return a pointer to the following |
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145 | byte. */ |
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146 | static bfd_byte * |
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147 | write_obj_attribute (bfd_byte *p, int tag, obj_attribute *attr) |
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148 | { |
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149 | /* Suppress default entries. */ |
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150 | if (is_default_attr (attr)) |
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151 | return p; |
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152 | |||
153 | p = write_uleb128 (p, tag); |
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154 | if (ATTR_TYPE_HAS_INT_VAL (attr->type)) |
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155 | p = write_uleb128 (p, attr->i); |
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156 | if (ATTR_TYPE_HAS_STR_VAL (attr->type)) |
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157 | { |
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158 | int len; |
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159 | |||
160 | len = strlen (attr->s) + 1; |
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161 | memcpy (p, attr->s, len); |
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162 | p += len; |
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163 | } |
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164 | |||
165 | return p; |
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166 | } |
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167 | |||
168 | /* Write the contents of the object attributes section (length SIZE) |
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169 | for VENDOR to CONTENTS. */ |
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170 | static void |
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171 | vendor_set_obj_attr_contents (bfd *abfd, bfd_byte *contents, bfd_vma size, |
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172 | int vendor) |
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173 | { |
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174 | bfd_byte *p; |
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175 | obj_attribute *attr; |
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176 | obj_attribute_list *list; |
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177 | int i; |
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178 | const char *vendor_name = vendor_obj_attr_name (abfd, vendor); |
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179 | size_t vendor_length = strlen (vendor_name) + 1; |
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180 | |||
181 | p = contents; |
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182 | bfd_put_32 (abfd, size, p); |
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183 | p += 4; |
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184 | memcpy (p, vendor_name, vendor_length); |
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185 | p += vendor_length; |
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186 | *(p++) = Tag_File; |
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187 | bfd_put_32 (abfd, size - 4 - vendor_length, p); |
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188 | p += 4; |
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189 | |||
190 | attr = elf_known_obj_attributes (abfd)[vendor]; |
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191 | for (i = LEAST_KNOWN_OBJ_ATTRIBUTE; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++) |
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192 | { |
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193 | int tag = i; |
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194 | if (get_elf_backend_data (abfd)->obj_attrs_order) |
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195 | tag = get_elf_backend_data (abfd)->obj_attrs_order (i); |
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196 | p = write_obj_attribute (p, tag, &attr[tag]); |
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197 | } |
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198 | |||
199 | for (list = elf_other_obj_attributes (abfd)[vendor]; |
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200 | list; |
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201 | list = list->next) |
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202 | p = write_obj_attribute (p, list->tag, &list->attr); |
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203 | } |
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204 | |||
205 | /* Write the contents of the object attributes section to CONTENTS. */ |
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206 | void |
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207 | bfd_elf_set_obj_attr_contents (bfd *abfd, bfd_byte *contents, bfd_vma size) |
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208 | { |
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209 | bfd_byte *p; |
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210 | int vendor; |
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211 | bfd_vma my_size; |
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212 | |||
213 | p = contents; |
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214 | *(p++) = 'A'; |
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215 | my_size = 1; |
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216 | for (vendor = OBJ_ATTR_FIRST; vendor <= OBJ_ATTR_LAST; vendor++) |
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217 | { |
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218 | bfd_vma vendor_size = vendor_obj_attr_size (abfd, vendor); |
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219 | if (vendor_size) |
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220 | vendor_set_obj_attr_contents (abfd, p, vendor_size, vendor); |
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221 | p += vendor_size; |
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222 | my_size += vendor_size; |
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223 | } |
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224 | |||
225 | if (size != my_size) |
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226 | abort (); |
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227 | } |
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228 | |||
229 | /* Allocate/find an object attribute. */ |
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230 | static obj_attribute * |
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231 | elf_new_obj_attr (bfd *abfd, int vendor, int tag) |
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232 | { |
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233 | obj_attribute *attr; |
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234 | obj_attribute_list *list; |
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235 | obj_attribute_list *p; |
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236 | obj_attribute_list **lastp; |
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237 | |||
238 | |||
239 | if (tag < NUM_KNOWN_OBJ_ATTRIBUTES) |
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240 | { |
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241 | /* Known tags are preallocated. */ |
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242 | attr = &elf_known_obj_attributes (abfd)[vendor][tag]; |
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243 | } |
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244 | else |
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245 | { |
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246 | /* Create a new tag. */ |
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247 | list = (obj_attribute_list *) |
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248 | bfd_alloc (abfd, sizeof (obj_attribute_list)); |
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249 | memset (list, 0, sizeof (obj_attribute_list)); |
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250 | list->tag = tag; |
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251 | /* Keep the tag list in order. */ |
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252 | lastp = &elf_other_obj_attributes (abfd)[vendor]; |
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253 | for (p = *lastp; p; p = p->next) |
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254 | { |
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255 | if (tag < p->tag) |
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256 | break; |
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257 | lastp = &p->next; |
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258 | } |
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259 | list->next = *lastp; |
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260 | *lastp = list; |
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261 | attr = &list->attr; |
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262 | } |
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263 | |||
264 | return attr; |
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265 | } |
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266 | |||
267 | /* Return the value of an integer object attribute. */ |
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268 | int |
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269 | bfd_elf_get_obj_attr_int (bfd *abfd, int vendor, int tag) |
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270 | { |
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271 | obj_attribute_list *p; |
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272 | |||
273 | if (tag < NUM_KNOWN_OBJ_ATTRIBUTES) |
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274 | { |
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275 | /* Known tags are preallocated. */ |
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276 | return elf_known_obj_attributes (abfd)[vendor][tag].i; |
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277 | } |
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278 | else |
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279 | { |
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280 | for (p = elf_other_obj_attributes (abfd)[vendor]; |
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281 | p; |
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282 | p = p->next) |
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283 | { |
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284 | if (tag == p->tag) |
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285 | return p->attr.i; |
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286 | if (tag < p->tag) |
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287 | break; |
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288 | } |
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289 | return 0; |
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290 | } |
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291 | } |
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292 | |||
293 | /* Add an integer object attribute. */ |
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294 | void |
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295 | bfd_elf_add_obj_attr_int (bfd *abfd, int vendor, int tag, unsigned int i) |
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296 | { |
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297 | obj_attribute *attr; |
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298 | |||
299 | attr = elf_new_obj_attr (abfd, vendor, tag); |
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300 | attr->type = _bfd_elf_obj_attrs_arg_type (abfd, vendor, tag); |
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301 | attr->i = i; |
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302 | } |
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303 | |||
304 | /* Duplicate an object attribute string value. */ |
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305 | char * |
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306 | _bfd_elf_attr_strdup (bfd *abfd, const char * s) |
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307 | { |
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308 | char * p; |
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309 | int len; |
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310 | |||
311 | len = strlen (s) + 1; |
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312 | p = (char *) bfd_alloc (abfd, len); |
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313 | return (char *) memcpy (p, s, len); |
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314 | } |
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315 | |||
316 | /* Add a string object attribute. */ |
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317 | void |
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318 | bfd_elf_add_obj_attr_string (bfd *abfd, int vendor, int tag, const char *s) |
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319 | { |
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320 | obj_attribute *attr; |
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321 | |||
322 | attr = elf_new_obj_attr (abfd, vendor, tag); |
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323 | attr->type = _bfd_elf_obj_attrs_arg_type (abfd, vendor, tag); |
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324 | attr->s = _bfd_elf_attr_strdup (abfd, s); |
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325 | } |
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326 | |||
327 | /* Add a int+string object attribute. */ |
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328 | void |
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329 | bfd_elf_add_obj_attr_int_string (bfd *abfd, int vendor, int tag, |
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330 | unsigned int i, const char *s) |
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331 | { |
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332 | obj_attribute *attr; |
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333 | |||
334 | attr = elf_new_obj_attr (abfd, vendor, tag); |
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335 | attr->type = _bfd_elf_obj_attrs_arg_type (abfd, vendor, tag); |
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336 | attr->i = i; |
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337 | attr->s = _bfd_elf_attr_strdup (abfd, s); |
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338 | } |
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339 | |||
340 | /* Copy the object attributes from IBFD to OBFD. */ |
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341 | void |
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342 | _bfd_elf_copy_obj_attributes (bfd *ibfd, bfd *obfd) |
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343 | { |
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344 | obj_attribute *in_attr; |
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345 | obj_attribute *out_attr; |
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346 | obj_attribute_list *list; |
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347 | int i; |
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348 | int vendor; |
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349 | |||
350 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
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351 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
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352 | return; |
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353 | |||
354 | for (vendor = OBJ_ATTR_FIRST; vendor <= OBJ_ATTR_LAST; vendor++) |
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355 | { |
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356 | in_attr |
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357 | = &elf_known_obj_attributes (ibfd)[vendor][LEAST_KNOWN_OBJ_ATTRIBUTE]; |
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358 | out_attr |
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359 | = &elf_known_obj_attributes (obfd)[vendor][LEAST_KNOWN_OBJ_ATTRIBUTE]; |
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360 | for (i = LEAST_KNOWN_OBJ_ATTRIBUTE; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++) |
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361 | { |
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362 | out_attr->type = in_attr->type; |
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363 | out_attr->i = in_attr->i; |
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364 | if (in_attr->s && *in_attr->s) |
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365 | out_attr->s = _bfd_elf_attr_strdup (obfd, in_attr->s); |
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366 | in_attr++; |
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367 | out_attr++; |
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368 | } |
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369 | |||
370 | for (list = elf_other_obj_attributes (ibfd)[vendor]; |
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371 | list; |
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372 | list = list->next) |
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373 | { |
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374 | in_attr = &list->attr; |
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375 | switch (in_attr->type & (ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL)) |
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376 | { |
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377 | case ATTR_TYPE_FLAG_INT_VAL: |
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378 | bfd_elf_add_obj_attr_int (obfd, vendor, list->tag, in_attr->i); |
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379 | break; |
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380 | case ATTR_TYPE_FLAG_STR_VAL: |
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381 | bfd_elf_add_obj_attr_string (obfd, vendor, list->tag, |
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382 | in_attr->s); |
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383 | break; |
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384 | case ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL: |
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385 | bfd_elf_add_obj_attr_int_string (obfd, vendor, list->tag, |
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386 | in_attr->i, in_attr->s); |
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387 | break; |
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388 | default: |
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389 | abort (); |
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390 | } |
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391 | } |
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392 | } |
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393 | } |
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394 | |||
395 | /* Determine whether a GNU object attribute tag takes an integer, a |
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396 | string or both. */ |
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397 | static int |
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398 | gnu_obj_attrs_arg_type (int tag) |
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399 | { |
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400 | /* Except for Tag_compatibility, for GNU attributes we follow the |
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401 | same rule ARM ones > 32 follow: odd-numbered tags take strings |
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402 | and even-numbered tags take integers. In addition, tag & 2 is |
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403 | nonzero for architecture-independent tags and zero for |
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404 | architecture-dependent ones. */ |
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405 | if (tag == Tag_compatibility) |
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406 | return 3; |
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407 | else |
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408 | return (tag & 1) != 0 ? 2 : 1; |
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409 | } |
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410 | |||
411 | /* Determine what arguments an attribute tag takes. */ |
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412 | int |
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413 | _bfd_elf_obj_attrs_arg_type (bfd *abfd, int vendor, int tag) |
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414 | { |
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415 | switch (vendor) |
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416 | { |
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417 | case OBJ_ATTR_PROC: |
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418 | return get_elf_backend_data (abfd)->obj_attrs_arg_type (tag); |
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419 | break; |
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420 | case OBJ_ATTR_GNU: |
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421 | return gnu_obj_attrs_arg_type (tag); |
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422 | break; |
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423 | default: |
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424 | abort (); |
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425 | } |
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426 | } |
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427 | |||
428 | /* Parse an object attributes section. */ |
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429 | void |
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430 | _bfd_elf_parse_attributes (bfd *abfd, Elf_Internal_Shdr * hdr) |
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431 | { |
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432 | bfd_byte *contents; |
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433 | bfd_byte *p; |
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434 | bfd_vma len; |
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435 | const char *std_sec; |
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436 | |||
437 | contents = (bfd_byte *) bfd_malloc (hdr->sh_size); |
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438 | if (!contents) |
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439 | return; |
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440 | if (!bfd_get_section_contents (abfd, hdr->bfd_section, contents, 0, |
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441 | hdr->sh_size)) |
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442 | { |
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443 | free (contents); |
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444 | return; |
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445 | } |
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446 | p = contents; |
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447 | std_sec = get_elf_backend_data (abfd)->obj_attrs_vendor; |
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448 | if (*(p++) == 'A') |
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449 | { |
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450 | len = hdr->sh_size - 1; |
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451 | while (len > 0) |
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452 | { |
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453 | int namelen; |
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454 | bfd_vma section_len; |
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455 | int vendor; |
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456 | |||
457 | section_len = bfd_get_32 (abfd, p); |
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458 | p += 4; |
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459 | if (section_len > len) |
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460 | section_len = len; |
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461 | len -= section_len; |
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462 | namelen = strlen ((char *) p) + 1; |
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463 | section_len -= namelen + 4; |
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464 | if (std_sec && strcmp ((char *) p, std_sec) == 0) |
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465 | vendor = OBJ_ATTR_PROC; |
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466 | else if (strcmp ((char *) p, "gnu") == 0) |
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467 | vendor = OBJ_ATTR_GNU; |
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468 | else |
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469 | { |
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470 | /* Other vendor section. Ignore it. */ |
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471 | p += namelen + section_len; |
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472 | continue; |
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473 | } |
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474 | |||
475 | p += namelen; |
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476 | while (section_len > 0) |
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477 | { |
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478 | int tag; |
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479 | unsigned int n; |
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480 | unsigned int val; |
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481 | bfd_vma subsection_len; |
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482 | bfd_byte *end; |
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483 | |||
484 | tag = read_unsigned_leb128 (abfd, p, &n); |
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485 | p += n; |
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486 | subsection_len = bfd_get_32 (abfd, p); |
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487 | p += 4; |
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488 | if (subsection_len > section_len) |
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489 | subsection_len = section_len; |
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490 | section_len -= subsection_len; |
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491 | subsection_len -= n + 4; |
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492 | end = p + subsection_len; |
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493 | switch (tag) |
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494 | { |
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495 | case Tag_File: |
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496 | while (p < end) |
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497 | { |
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498 | int type; |
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499 | |||
500 | tag = read_unsigned_leb128 (abfd, p, &n); |
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501 | p += n; |
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502 | type = _bfd_elf_obj_attrs_arg_type (abfd, vendor, tag); |
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503 | switch (type & (ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL)) |
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504 | { |
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505 | case ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL: |
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506 | val = read_unsigned_leb128 (abfd, p, &n); |
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507 | p += n; |
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508 | bfd_elf_add_obj_attr_int_string (abfd, vendor, tag, |
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509 | val, (char *)p); |
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510 | p += strlen ((char *)p) + 1; |
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511 | break; |
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512 | case ATTR_TYPE_FLAG_STR_VAL: |
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513 | bfd_elf_add_obj_attr_string (abfd, vendor, tag, |
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514 | (char *)p); |
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515 | p += strlen ((char *)p) + 1; |
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516 | break; |
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517 | case ATTR_TYPE_FLAG_INT_VAL: |
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518 | val = read_unsigned_leb128 (abfd, p, &n); |
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519 | p += n; |
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520 | bfd_elf_add_obj_attr_int (abfd, vendor, tag, val); |
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521 | break; |
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522 | default: |
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523 | abort (); |
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524 | } |
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525 | } |
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526 | break; |
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527 | case Tag_Section: |
||
528 | case Tag_Symbol: |
||
529 | /* Don't have anywhere convenient to attach these. |
||
530 | Fall through for now. */ |
||
531 | default: |
||
532 | /* Ignore things we don't kow about. */ |
||
533 | p += subsection_len; |
||
534 | subsection_len = 0; |
||
535 | break; |
||
536 | } |
||
537 | } |
||
538 | } |
||
539 | } |
||
540 | free (contents); |
||
541 | } |
||
542 | |||
543 | /* Merge common object attributes from IBFD into OBFD. Raise an error |
||
544 | if there are conflicting attributes. Any processor-specific |
||
545 | attributes have already been merged. This must be called from the |
||
546 | bfd_elfNN_bfd_merge_private_bfd_data hook for each individual |
||
547 | target, along with any target-specific merging. Because there are |
||
548 | no common attributes other than Tag_compatibility at present, and |
||
549 | non-"gnu" Tag_compatibility is not expected in "gnu" sections, this |
||
550 | is not presently called for targets without their own |
||
551 | attributes. */ |
||
552 | |||
553 | bfd_boolean |
||
554 | _bfd_elf_merge_object_attributes (bfd *ibfd, bfd *obfd) |
||
555 | { |
||
556 | obj_attribute *in_attr; |
||
557 | obj_attribute *out_attr; |
||
558 | int vendor; |
||
559 | |||
560 | /* The only common attribute is currently Tag_compatibility, |
||
561 | accepted in both processor and "gnu" sections. */ |
||
562 | for (vendor = OBJ_ATTR_FIRST; vendor <= OBJ_ATTR_LAST; vendor++) |
||
563 | { |
||
564 | /* Handle Tag_compatibility. The tags are only compatible if the flags |
||
565 | are identical and, if the flags are '1', the strings are identical. |
||
566 | If the flags are non-zero, then we can only use the string "gnu". */ |
||
567 | in_attr = &elf_known_obj_attributes (ibfd)[vendor][Tag_compatibility]; |
||
568 | out_attr = &elf_known_obj_attributes (obfd)[vendor][Tag_compatibility]; |
||
569 | |||
570 | if (in_attr->i > 0 && strcmp (in_attr->s, "gnu") != 0) |
||
571 | { |
||
572 | _bfd_error_handler |
||
573 | (_("error: %B: Object has vendor-specific contents that " |
||
574 | "must be processed by the '%s' toolchain"), |
||
575 | ibfd, in_attr->s); |
||
576 | return FALSE; |
||
577 | } |
||
578 | |||
579 | if (in_attr->i != out_attr->i |
||
580 | || (in_attr->i != 0 && strcmp (in_attr->s, out_attr->s) != 0)) |
||
581 | { |
||
582 | _bfd_error_handler (_("error: %B: Object tag '%d, %s' is " |
||
583 | "incompatible with tag '%d, %s'"), |
||
584 | ibfd, |
||
585 | in_attr->i, in_attr->s ? in_attr->s : "", |
||
586 | out_attr->i, out_attr->s ? out_attr->s : ""); |
||
587 | return FALSE; |
||
588 | } |
||
589 | } |
||
590 | |||
591 | return TRUE; |
||
592 | } |
||
593 | |||
594 | /* Merge an unknown processor-specific attribute TAG, within the range |
||
595 | of known attributes, from IBFD into OBFD; return TRUE if the link |
||
596 | is OK, FALSE if it must fail. */ |
||
597 | |||
598 | bfd_boolean |
||
599 | _bfd_elf_merge_unknown_attribute_low (bfd *ibfd, bfd *obfd, int tag) |
||
600 | { |
||
601 | obj_attribute *in_attr; |
||
602 | obj_attribute *out_attr; |
||
603 | bfd *err_bfd = NULL; |
||
604 | bfd_boolean result = TRUE; |
||
605 | |||
606 | in_attr = elf_known_obj_attributes_proc (ibfd); |
||
607 | out_attr = elf_known_obj_attributes_proc (obfd); |
||
608 | |||
609 | if (out_attr[tag].i != 0 || out_attr[tag].s != NULL) |
||
610 | err_bfd = obfd; |
||
611 | else if (in_attr[tag].i != 0 || in_attr[tag].s != NULL) |
||
612 | err_bfd = ibfd; |
||
613 | |||
614 | if (err_bfd != NULL) |
||
615 | result |
||
616 | = get_elf_backend_data (err_bfd)->obj_attrs_handle_unknown (err_bfd, tag); |
||
617 | |||
618 | /* Only pass on attributes that match in both inputs. */ |
||
619 | if (in_attr[tag].i != out_attr[tag].i |
||
620 | || (in_attr[tag].s == NULL) != (out_attr[tag].s == NULL) |
||
621 | || (in_attr[tag].s != NULL && out_attr[tag].s != NULL |
||
622 | && strcmp (in_attr[tag].s, out_attr[tag].s) != 0)) |
||
623 | { |
||
624 | out_attr[tag].i = 0; |
||
625 | out_attr[tag].s = NULL; |
||
626 | } |
||
627 | |||
628 | return result; |
||
629 | } |
||
630 | |||
631 | /* Merge the lists of unknown processor-specific attributes, outside |
||
632 | the known range, from IBFD into OBFD; return TRUE if the link is |
||
633 | OK, FALSE if it must fail. */ |
||
634 | |||
635 | bfd_boolean |
||
636 | _bfd_elf_merge_unknown_attribute_list (bfd *ibfd, bfd *obfd) |
||
637 | { |
||
638 | obj_attribute_list *in_list; |
||
639 | obj_attribute_list *out_list; |
||
640 | obj_attribute_list **out_listp; |
||
641 | bfd_boolean result = TRUE; |
||
642 | |||
643 | in_list = elf_other_obj_attributes_proc (ibfd); |
||
644 | out_listp = &elf_other_obj_attributes_proc (obfd); |
||
645 | out_list = *out_listp; |
||
646 | |||
647 | for (; in_list || out_list; ) |
||
648 | { |
||
649 | bfd *err_bfd = NULL; |
||
650 | int err_tag = 0; |
||
651 | |||
652 | /* The tags for each list are in numerical order. */ |
||
653 | /* If the tags are equal, then merge. */ |
||
654 | if (out_list && (!in_list || in_list->tag > out_list->tag)) |
||
655 | { |
||
656 | /* This attribute only exists in obfd. We can't merge, and we don't |
||
657 | know what the tag means, so delete it. */ |
||
658 | err_bfd = obfd; |
||
659 | err_tag = out_list->tag; |
||
660 | *out_listp = out_list->next; |
||
661 | out_list = *out_listp; |
||
662 | } |
||
663 | else if (in_list && (!out_list || in_list->tag < out_list->tag)) |
||
664 | { |
||
665 | /* This attribute only exists in ibfd. We can't merge, and we don't |
||
666 | know what the tag means, so ignore it. */ |
||
667 | err_bfd = ibfd; |
||
668 | err_tag = in_list->tag; |
||
669 | in_list = in_list->next; |
||
670 | } |
||
671 | else /* The tags are equal. */ |
||
672 | { |
||
673 | /* As present, all attributes in the list are unknown, and |
||
674 | therefore can't be merged meaningfully. */ |
||
675 | err_bfd = obfd; |
||
676 | err_tag = out_list->tag; |
||
677 | |||
678 | /* Only pass on attributes that match in both inputs. */ |
||
679 | if (in_list->attr.i != out_list->attr.i |
||
680 | || (in_list->attr.s == NULL) != (out_list->attr.s == NULL) |
||
681 | || (in_list->attr.s && out_list->attr.s |
||
682 | && strcmp (in_list->attr.s, out_list->attr.s) != 0)) |
||
683 | { |
||
684 | /* No match. Delete the attribute. */ |
||
685 | *out_listp = out_list->next; |
||
686 | out_list = *out_listp; |
||
687 | } |
||
688 | else |
||
689 | { |
||
690 | /* Matched. Keep the attribute and move to the next. */ |
||
691 | out_list = out_list->next; |
||
692 | in_list = in_list->next; |
||
693 | } |
||
694 | } |
||
695 | |||
696 | if (err_bfd) |
||
697 | result = result |
||
698 | && get_elf_backend_data (err_bfd)->obj_attrs_handle_unknown (err_bfd, |
||
699 | err_tag); |
||
700 | } |
||
701 | |||
702 | return result; |
||
703 | }>=>>>=>>>>>=>>> |