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Rev | Author | Line No. | Line |
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5197 | serge | 1 | /* opncls.c -- open and close a BFD. |
6324 | serge | 2 | Copyright (C) 1990-2015 Free Software Foundation, Inc. |
5197 | serge | 3 | |
4 | Written by Cygnus Support. |
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5 | |||
6 | This file is part of BFD, the Binary File Descriptor library. |
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7 | |||
8 | This program is free software; you can redistribute it and/or modify |
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9 | it under the terms of the GNU General Public License as published by |
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10 | the Free Software Foundation; either version 3 of the License, or |
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11 | (at your option) any later version. |
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12 | |||
13 | This program is distributed in the hope that it will be useful, |
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14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | GNU General Public License for more details. |
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17 | |||
18 | You should have received a copy of the GNU General Public License |
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19 | along with this program; if not, write to the Free Software |
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20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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21 | MA 02110-1301, USA. */ |
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22 | |||
23 | #include "sysdep.h" |
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24 | #include "bfd.h" |
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25 | #include "objalloc.h" |
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26 | #include "libbfd.h" |
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27 | #include "libiberty.h" |
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28 | |||
29 | #ifndef S_IXUSR |
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30 | #define S_IXUSR 0100 /* Execute by owner. */ |
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31 | #endif |
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32 | #ifndef S_IXGRP |
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33 | #define S_IXGRP 0010 /* Execute by group. */ |
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34 | #endif |
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35 | #ifndef S_IXOTH |
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36 | #define S_IXOTH 0001 /* Execute by others. */ |
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37 | #endif |
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38 | |||
39 | /* Counters used to initialize the bfd identifier. */ |
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40 | |||
41 | static unsigned int bfd_id_counter = 0; |
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42 | static unsigned int bfd_reserved_id_counter = 0; |
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43 | |||
44 | /* |
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45 | CODE_FRAGMENT |
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46 | .{* Set to N to open the next N BFDs using an alternate id space. *} |
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47 | .extern unsigned int bfd_use_reserved_id; |
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48 | */ |
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49 | unsigned int bfd_use_reserved_id = 0; |
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50 | |||
51 | /* fdopen is a loser -- we should use stdio exclusively. Unfortunately |
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52 | if we do that we can't use fcntl. */ |
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53 | |||
54 | /* Return a new BFD. All BFD's are allocated through this routine. */ |
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55 | |||
56 | bfd * |
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57 | _bfd_new_bfd (void) |
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58 | { |
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59 | bfd *nbfd; |
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60 | |||
61 | nbfd = (bfd *) bfd_zmalloc (sizeof (bfd)); |
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62 | if (nbfd == NULL) |
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63 | return NULL; |
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64 | |||
65 | if (bfd_use_reserved_id) |
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66 | { |
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67 | nbfd->id = --bfd_reserved_id_counter; |
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68 | --bfd_use_reserved_id; |
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69 | } |
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70 | else |
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71 | nbfd->id = bfd_id_counter++; |
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72 | |||
73 | nbfd->memory = objalloc_create (); |
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74 | if (nbfd->memory == NULL) |
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75 | { |
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76 | bfd_set_error (bfd_error_no_memory); |
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77 | free (nbfd); |
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78 | return NULL; |
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79 | } |
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80 | |||
81 | nbfd->arch_info = &bfd_default_arch_struct; |
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82 | |||
83 | if (!bfd_hash_table_init_n (& nbfd->section_htab, bfd_section_hash_newfunc, |
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84 | sizeof (struct section_hash_entry), 13)) |
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85 | { |
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86 | free (nbfd); |
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87 | return NULL; |
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88 | } |
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89 | |||
90 | return nbfd; |
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91 | } |
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92 | |||
93 | static const struct bfd_iovec opncls_iovec; |
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94 | |||
95 | /* Allocate a new BFD as a member of archive OBFD. */ |
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96 | |||
97 | bfd * |
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98 | _bfd_new_bfd_contained_in (bfd *obfd) |
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99 | { |
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100 | bfd *nbfd; |
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101 | |||
102 | nbfd = _bfd_new_bfd (); |
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103 | if (nbfd == NULL) |
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104 | return NULL; |
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105 | nbfd->xvec = obfd->xvec; |
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106 | nbfd->iovec = obfd->iovec; |
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107 | if (obfd->iovec == &opncls_iovec) |
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108 | nbfd->iostream = obfd->iostream; |
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109 | nbfd->my_archive = obfd; |
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110 | nbfd->direction = read_direction; |
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111 | nbfd->target_defaulted = obfd->target_defaulted; |
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6324 | serge | 112 | nbfd->lto_output = obfd->lto_output; |
113 | nbfd->no_export = obfd->no_export; |
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5197 | serge | 114 | return nbfd; |
115 | } |
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116 | |||
117 | /* Delete a BFD. */ |
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118 | |||
119 | static void |
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120 | _bfd_delete_bfd (bfd *abfd) |
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121 | { |
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122 | if (abfd->memory) |
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123 | { |
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124 | bfd_hash_table_free (&abfd->section_htab); |
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125 | objalloc_free ((struct objalloc *) abfd->memory); |
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126 | } |
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127 | |||
6324 | serge | 128 | if (abfd->filename) |
129 | free ((char *) abfd->filename); |
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5197 | serge | 130 | free (abfd->arelt_data); |
131 | free (abfd); |
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132 | } |
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133 | |||
134 | /* Free objalloc memory. */ |
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135 | |||
136 | bfd_boolean |
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137 | _bfd_free_cached_info (bfd *abfd) |
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138 | { |
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139 | if (abfd->memory) |
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140 | { |
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141 | bfd_hash_table_free (&abfd->section_htab); |
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142 | objalloc_free ((struct objalloc *) abfd->memory); |
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143 | |||
144 | abfd->sections = NULL; |
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145 | abfd->section_last = NULL; |
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146 | abfd->outsymbols = NULL; |
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147 | abfd->tdata.any = NULL; |
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148 | abfd->usrdata = NULL; |
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149 | abfd->memory = NULL; |
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150 | } |
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151 | |||
152 | return TRUE; |
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153 | } |
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154 | |||
155 | /* |
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156 | SECTION |
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157 | Opening and closing BFDs |
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158 | |||
159 | SUBSECTION |
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160 | Functions for opening and closing |
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161 | */ |
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162 | |||
163 | /* |
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164 | FUNCTION |
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165 | bfd_fopen |
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166 | |||
167 | SYNOPSIS |
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168 | bfd *bfd_fopen (const char *filename, const char *target, |
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169 | const char *mode, int fd); |
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170 | |||
171 | DESCRIPTION |
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172 | Open the file @var{filename} with the target @var{target}. |
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173 | Return a pointer to the created BFD. If @var{fd} is not -1, |
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174 | then < |
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175 | is used. @var{mode} is passed directly to < |
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176 | < |
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177 | |||
178 | Calls < |
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179 | that function. |
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180 | |||
181 | The new BFD is marked as cacheable iff @var{fd} is -1. |
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182 | |||
183 | If < |
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184 | are < |
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185 | < |
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186 | |||
187 | On error, @var{fd} is always closed. |
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6324 | serge | 188 | |
189 | A copy of the @var{filename} argument is stored in the newly created |
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190 | BFD. It can be accessed via the bfd_get_filename() macro. |
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5197 | serge | 191 | */ |
192 | |||
193 | bfd * |
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194 | bfd_fopen (const char *filename, const char *target, const char *mode, int fd) |
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195 | { |
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196 | bfd *nbfd; |
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197 | const bfd_target *target_vec; |
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198 | |||
199 | nbfd = _bfd_new_bfd (); |
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200 | if (nbfd == NULL) |
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201 | { |
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202 | if (fd != -1) |
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203 | close (fd); |
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204 | return NULL; |
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205 | } |
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206 | |||
207 | target_vec = bfd_find_target (target, nbfd); |
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208 | if (target_vec == NULL) |
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209 | { |
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210 | if (fd != -1) |
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211 | close (fd); |
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212 | _bfd_delete_bfd (nbfd); |
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213 | return NULL; |
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214 | } |
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215 | |||
216 | #ifdef HAVE_FDOPEN |
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217 | if (fd != -1) |
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218 | nbfd->iostream = fdopen (fd, mode); |
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219 | else |
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220 | #endif |
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221 | nbfd->iostream = real_fopen (filename, mode); |
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222 | if (nbfd->iostream == NULL) |
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223 | { |
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224 | bfd_set_error (bfd_error_system_call); |
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225 | _bfd_delete_bfd (nbfd); |
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226 | return NULL; |
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227 | } |
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228 | |||
229 | /* OK, put everything where it belongs. */ |
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230 | |||
6324 | serge | 231 | /* PR 11983: Do not cache the original filename, but |
232 | rather make a copy - the original might go away. */ |
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233 | nbfd->filename = xstrdup (filename); |
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234 | |||
5197 | serge | 235 | /* Figure out whether the user is opening the file for reading, |
236 | writing, or both, by looking at the MODE argument. */ |
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237 | if ((mode[0] == 'r' || mode[0] == 'w' || mode[0] == 'a') |
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238 | && mode[1] == '+') |
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239 | nbfd->direction = both_direction; |
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240 | else if (mode[0] == 'r') |
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241 | nbfd->direction = read_direction; |
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242 | else |
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243 | nbfd->direction = write_direction; |
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244 | |||
245 | if (! bfd_cache_init (nbfd)) |
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246 | { |
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247 | _bfd_delete_bfd (nbfd); |
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248 | return NULL; |
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249 | } |
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250 | nbfd->opened_once = TRUE; |
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251 | |||
252 | /* If we opened the file by name, mark it cacheable; we can close it |
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253 | and reopen it later. However, if a file descriptor was provided, |
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254 | then it may have been opened with special flags that make it |
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255 | unsafe to close and reopen the file. */ |
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256 | if (fd == -1) |
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257 | (void) bfd_set_cacheable (nbfd, TRUE); |
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258 | |||
259 | return nbfd; |
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260 | } |
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261 | |||
262 | /* |
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263 | FUNCTION |
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264 | bfd_openr |
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265 | |||
266 | SYNOPSIS |
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267 | bfd *bfd_openr (const char *filename, const char *target); |
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268 | |||
269 | DESCRIPTION |
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270 | Open the file @var{filename} (using < |
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271 | @var{target}. Return a pointer to the created BFD. |
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272 | |||
273 | Calls < |
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274 | that function. |
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275 | |||
276 | If < |
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277 | are < |
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278 | < |
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6324 | serge | 279 | |
280 | A copy of the @var{filename} argument is stored in the newly created |
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281 | BFD. It can be accessed via the bfd_get_filename() macro. |
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5197 | serge | 282 | */ |
283 | |||
284 | bfd * |
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285 | bfd_openr (const char *filename, const char *target) |
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286 | { |
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287 | return bfd_fopen (filename, target, FOPEN_RB, -1); |
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288 | } |
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289 | |||
290 | /* Don't try to `optimize' this function: |
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291 | |||
292 | o - We lock using stack space so that interrupting the locking |
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293 | won't cause a storage leak. |
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294 | o - We open the file stream last, since we don't want to have to |
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295 | close it if anything goes wrong. Closing the stream means closing |
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296 | the file descriptor too, even though we didn't open it. */ |
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297 | /* |
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298 | FUNCTION |
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299 | bfd_fdopenr |
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300 | |||
301 | SYNOPSIS |
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302 | bfd *bfd_fdopenr (const char *filename, const char *target, int fd); |
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303 | |||
304 | DESCRIPTION |
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305 | < |
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306 | < |
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307 | @var{fd} supplied. |
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308 | |||
309 | When the file is later < |
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310 | be closed. If the caller desires that this file descriptor be |
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311 | cached by BFD (opened as needed, closed as needed to free |
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312 | descriptors for other opens), with the supplied @var{fd} used as |
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313 | an initial file descriptor (but subject to closure at any time), |
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314 | call bfd_set_cacheable(bfd, 1) on the returned BFD. The default |
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315 | is to assume no caching; the file descriptor will remain open |
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316 | until < |
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317 | on other files. |
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318 | |||
319 | Possible errors are < |
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320 | < |
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321 | |||
322 | On error, @var{fd} is closed. |
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6324 | serge | 323 | |
324 | A copy of the @var{filename} argument is stored in the newly created |
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325 | BFD. It can be accessed via the bfd_get_filename() macro. |
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5197 | serge | 326 | */ |
327 | |||
328 | bfd * |
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329 | bfd_fdopenr (const char *filename, const char *target, int fd) |
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330 | { |
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331 | const char *mode; |
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332 | #if defined(HAVE_FCNTL) && defined(F_GETFL) |
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333 | int fdflags; |
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334 | #endif |
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335 | |||
336 | #if ! defined(HAVE_FCNTL) || ! defined(F_GETFL) |
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337 | mode = FOPEN_RUB; /* Assume full access. */ |
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338 | #else |
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339 | fdflags = fcntl (fd, F_GETFL, NULL); |
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340 | if (fdflags == -1) |
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341 | { |
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342 | int save = errno; |
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343 | |||
344 | close (fd); |
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345 | errno = save; |
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346 | bfd_set_error (bfd_error_system_call); |
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347 | return NULL; |
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348 | } |
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349 | |||
350 | /* (O_ACCMODE) parens are to avoid Ultrix header file bug. */ |
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351 | switch (fdflags & (O_ACCMODE)) |
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352 | { |
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353 | case O_RDONLY: mode = FOPEN_RB; break; |
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354 | case O_WRONLY: mode = FOPEN_RUB; break; |
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355 | case O_RDWR: mode = FOPEN_RUB; break; |
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356 | default: abort (); |
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357 | } |
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358 | #endif |
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359 | |||
360 | return bfd_fopen (filename, target, mode, fd); |
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361 | } |
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362 | |||
363 | /* |
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364 | FUNCTION |
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365 | bfd_openstreamr |
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366 | |||
367 | SYNOPSIS |
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6324 | serge | 368 | bfd *bfd_openstreamr (const char * filename, const char * target, void * stream); |
5197 | serge | 369 | |
370 | DESCRIPTION |
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371 | |||
372 | Open a BFD for read access on an existing stdio stream. When |
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373 | the BFD is passed to < |
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6324 | serge | 374 | |
375 | A copy of the @var{filename} argument is stored in the newly created |
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376 | BFD. It can be accessed via the bfd_get_filename() macro. |
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5197 | serge | 377 | */ |
378 | |||
379 | bfd * |
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380 | bfd_openstreamr (const char *filename, const char *target, void *streamarg) |
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381 | { |
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382 | FILE *stream = (FILE *) streamarg; |
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383 | bfd *nbfd; |
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384 | const bfd_target *target_vec; |
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385 | |||
386 | nbfd = _bfd_new_bfd (); |
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387 | if (nbfd == NULL) |
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388 | return NULL; |
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389 | |||
390 | target_vec = bfd_find_target (target, nbfd); |
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391 | if (target_vec == NULL) |
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392 | { |
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393 | _bfd_delete_bfd (nbfd); |
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394 | return NULL; |
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395 | } |
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396 | |||
397 | nbfd->iostream = stream; |
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6324 | serge | 398 | /* PR 11983: Do not cache the original filename, but |
399 | rather make a copy - the original might go away. */ |
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400 | nbfd->filename = xstrdup (filename); |
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5197 | serge | 401 | nbfd->direction = read_direction; |
402 | |||
403 | if (! bfd_cache_init (nbfd)) |
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404 | { |
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405 | _bfd_delete_bfd (nbfd); |
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406 | return NULL; |
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407 | } |
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408 | |||
409 | return nbfd; |
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410 | } |
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411 | |||
412 | /* |
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413 | FUNCTION |
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414 | bfd_openr_iovec |
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415 | |||
416 | SYNOPSIS |
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417 | bfd *bfd_openr_iovec (const char *filename, const char *target, |
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418 | void *(*open_func) (struct bfd *nbfd, |
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419 | void *open_closure), |
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420 | void *open_closure, |
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421 | file_ptr (*pread_func) (struct bfd *nbfd, |
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422 | void *stream, |
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423 | void *buf, |
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424 | file_ptr nbytes, |
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425 | file_ptr offset), |
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426 | int (*close_func) (struct bfd *nbfd, |
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427 | void *stream), |
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428 | int (*stat_func) (struct bfd *abfd, |
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429 | void *stream, |
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430 | struct stat *sb)); |
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431 | |||
432 | DESCRIPTION |
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433 | |||
434 | Create and return a BFD backed by a read-only @var{stream}. |
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435 | The @var{stream} is created using @var{open_func}, accessed using |
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436 | @var{pread_func} and destroyed using @var{close_func}. |
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437 | |||
438 | Calls < |
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439 | that function. |
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440 | |||
441 | Calls @var{open_func} (which can call < |
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442 | < |
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443 | the BFD. @var{open_func} either succeeds returning the |
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444 | non-< |
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445 | (setting < |
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446 | |||
447 | Calls @var{pread_func} to request @var{nbytes} of data from |
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448 | @var{stream} starting at @var{offset} (e.g., via a call to |
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449 | < |
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450 | number of bytes read (which can be less than @var{nbytes} when |
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451 | end-of-file), or fails returning -1 (setting < |
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452 | |||
453 | Calls @var{close_func} when the BFD is later closed using |
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454 | < |
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455 | fails returning -1 (setting < |
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456 | |||
457 | Calls @var{stat_func} to fill in a stat structure for bfd_stat, |
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458 | bfd_get_size, and bfd_get_mtime calls. @var{stat_func} returns 0 |
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459 | on success, or returns -1 on failure (setting < |
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460 | |||
461 | If < |
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462 | occurred. Possible errors are < |
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463 | < |
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464 | |||
6324 | serge | 465 | A copy of the @var{filename} argument is stored in the newly created |
466 | BFD. It can be accessed via the bfd_get_filename() macro. |
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5197 | serge | 467 | */ |
468 | |||
469 | struct opncls |
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470 | { |
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471 | void *stream; |
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472 | file_ptr (*pread) (struct bfd *abfd, void *stream, void *buf, |
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473 | file_ptr nbytes, file_ptr offset); |
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474 | int (*close) (struct bfd *abfd, void *stream); |
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475 | int (*stat) (struct bfd *abfd, void *stream, struct stat *sb); |
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476 | file_ptr where; |
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477 | }; |
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478 | |||
479 | static file_ptr |
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480 | opncls_btell (struct bfd *abfd) |
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481 | { |
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482 | struct opncls *vec = (struct opncls *) abfd->iostream; |
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483 | return vec->where; |
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484 | } |
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485 | |||
486 | static int |
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487 | opncls_bseek (struct bfd *abfd, file_ptr offset, int whence) |
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488 | { |
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489 | struct opncls *vec = (struct opncls *) abfd->iostream; |
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490 | switch (whence) |
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491 | { |
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492 | case SEEK_SET: vec->where = offset; break; |
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493 | case SEEK_CUR: vec->where += offset; break; |
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494 | case SEEK_END: return -1; |
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495 | } |
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496 | return 0; |
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497 | } |
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498 | |||
499 | static file_ptr |
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500 | opncls_bread (struct bfd *abfd, void *buf, file_ptr nbytes) |
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501 | { |
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502 | struct opncls *vec = (struct opncls *) abfd->iostream; |
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503 | file_ptr nread = (vec->pread) (abfd, vec->stream, buf, nbytes, vec->where); |
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504 | if (nread < 0) |
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505 | return nread; |
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506 | vec->where += nread; |
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507 | return nread; |
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508 | } |
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509 | |||
510 | static file_ptr |
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511 | opncls_bwrite (struct bfd *abfd ATTRIBUTE_UNUSED, |
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512 | const void *where ATTRIBUTE_UNUSED, |
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513 | file_ptr nbytes ATTRIBUTE_UNUSED) |
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514 | { |
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515 | return -1; |
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516 | } |
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517 | |||
518 | static int |
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519 | opncls_bclose (struct bfd *abfd) |
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520 | { |
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521 | struct opncls *vec = (struct opncls *) abfd->iostream; |
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522 | /* Since the VEC's memory is bound to the bfd deleting the bfd will |
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523 | free it. */ |
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524 | int status = 0; |
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525 | if (vec->close != NULL) |
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526 | status = (vec->close) (abfd, vec->stream); |
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527 | abfd->iostream = NULL; |
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528 | return status; |
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529 | } |
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530 | |||
531 | static int |
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532 | opncls_bflush (struct bfd *abfd ATTRIBUTE_UNUSED) |
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533 | { |
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534 | return 0; |
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535 | } |
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536 | |||
537 | static int |
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538 | opncls_bstat (struct bfd *abfd, struct stat *sb) |
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539 | { |
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540 | struct opncls *vec = (struct opncls *) abfd->iostream; |
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541 | |||
542 | memset (sb, 0, sizeof (*sb)); |
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543 | if (vec->stat == NULL) |
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544 | return 0; |
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545 | |||
546 | return (vec->stat) (abfd, vec->stream, sb); |
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547 | } |
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548 | |||
549 | static void * |
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550 | opncls_bmmap (struct bfd *abfd ATTRIBUTE_UNUSED, |
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551 | void *addr ATTRIBUTE_UNUSED, |
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552 | bfd_size_type len ATTRIBUTE_UNUSED, |
||
553 | int prot ATTRIBUTE_UNUSED, |
||
554 | int flags ATTRIBUTE_UNUSED, |
||
555 | file_ptr offset ATTRIBUTE_UNUSED, |
||
556 | void **map_addr ATTRIBUTE_UNUSED, |
||
557 | bfd_size_type *map_len ATTRIBUTE_UNUSED) |
||
558 | { |
||
559 | return (void *) -1; |
||
560 | } |
||
561 | |||
562 | static const struct bfd_iovec opncls_iovec = { |
||
563 | &opncls_bread, &opncls_bwrite, &opncls_btell, &opncls_bseek, |
||
564 | &opncls_bclose, &opncls_bflush, &opncls_bstat, &opncls_bmmap |
||
565 | }; |
||
566 | |||
567 | bfd * |
||
568 | bfd_openr_iovec (const char *filename, const char *target, |
||
569 | void *(*open_p) (struct bfd *, void *), |
||
570 | void *open_closure, |
||
571 | file_ptr (*pread_p) (struct bfd *, void *, void *, |
||
572 | file_ptr, file_ptr), |
||
573 | int (*close_p) (struct bfd *, void *), |
||
574 | int (*stat_p) (struct bfd *, void *, struct stat *)) |
||
575 | { |
||
576 | bfd *nbfd; |
||
577 | const bfd_target *target_vec; |
||
578 | struct opncls *vec; |
||
579 | void *stream; |
||
580 | |||
581 | nbfd = _bfd_new_bfd (); |
||
582 | if (nbfd == NULL) |
||
583 | return NULL; |
||
584 | |||
585 | target_vec = bfd_find_target (target, nbfd); |
||
586 | if (target_vec == NULL) |
||
587 | { |
||
588 | _bfd_delete_bfd (nbfd); |
||
589 | return NULL; |
||
590 | } |
||
591 | |||
6324 | serge | 592 | /* PR 11983: Do not cache the original filename, but |
593 | rather make a copy - the original might go away. */ |
||
594 | nbfd->filename = xstrdup (filename); |
||
5197 | serge | 595 | nbfd->direction = read_direction; |
596 | |||
597 | /* `open_p (...)' would get expanded by an the open(2) syscall macro. */ |
||
598 | stream = (*open_p) (nbfd, open_closure); |
||
599 | if (stream == NULL) |
||
600 | { |
||
601 | _bfd_delete_bfd (nbfd); |
||
602 | return NULL; |
||
603 | } |
||
604 | |||
605 | vec = (struct opncls *) bfd_zalloc (nbfd, sizeof (struct opncls)); |
||
606 | vec->stream = stream; |
||
607 | vec->pread = pread_p; |
||
608 | vec->close = close_p; |
||
609 | vec->stat = stat_p; |
||
610 | |||
611 | nbfd->iovec = &opncls_iovec; |
||
612 | nbfd->iostream = vec; |
||
613 | |||
614 | return nbfd; |
||
615 | } |
||
616 | |||
617 | /* bfd_openw -- open for writing. |
||
618 | Returns a pointer to a freshly-allocated BFD on success, or NULL. |
||
619 | |||
620 | See comment by bfd_fdopenr before you try to modify this function. */ |
||
621 | |||
622 | /* |
||
623 | FUNCTION |
||
624 | bfd_openw |
||
625 | |||
626 | SYNOPSIS |
||
627 | bfd *bfd_openw (const char *filename, const char *target); |
||
628 | |||
629 | DESCRIPTION |
||
630 | Create a BFD, associated with file @var{filename}, using the |
||
631 | file format @var{target}, and return a pointer to it. |
||
632 | |||
633 | Possible errors are < |
||
634 | < |
||
6324 | serge | 635 | |
636 | A copy of the @var{filename} argument is stored in the newly created |
||
637 | BFD. It can be accessed via the bfd_get_filename() macro. |
||
5197 | serge | 638 | */ |
639 | |||
640 | bfd * |
||
641 | bfd_openw (const char *filename, const char *target) |
||
642 | { |
||
643 | bfd *nbfd; |
||
644 | const bfd_target *target_vec; |
||
645 | |||
646 | /* nbfd has to point to head of malloc'ed block so that bfd_close may |
||
647 | reclaim it correctly. */ |
||
648 | nbfd = _bfd_new_bfd (); |
||
649 | if (nbfd == NULL) |
||
650 | return NULL; |
||
651 | |||
652 | target_vec = bfd_find_target (target, nbfd); |
||
653 | if (target_vec == NULL) |
||
654 | { |
||
655 | _bfd_delete_bfd (nbfd); |
||
656 | return NULL; |
||
657 | } |
||
658 | |||
6324 | serge | 659 | /* PR 11983: Do not cache the original filename, but |
660 | rather make a copy - the original might go away. */ |
||
661 | nbfd->filename = xstrdup (filename); |
||
5197 | serge | 662 | nbfd->direction = write_direction; |
663 | |||
664 | if (bfd_open_file (nbfd) == NULL) |
||
665 | { |
||
666 | /* File not writeable, etc. */ |
||
667 | bfd_set_error (bfd_error_system_call); |
||
668 | _bfd_delete_bfd (nbfd); |
||
669 | return NULL; |
||
670 | } |
||
671 | |||
672 | return nbfd; |
||
673 | } |
||
674 | |||
675 | static inline void |
||
676 | _maybe_make_executable (bfd * abfd) |
||
677 | { |
||
678 | /* If the file was open for writing and is now executable, |
||
679 | make it so. */ |
||
680 | if (abfd->direction == write_direction |
||
681 | && (abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
||
682 | { |
||
683 | struct stat buf; |
||
684 | |||
685 | if (stat (abfd->filename, &buf) == 0 |
||
686 | /* Do not attempt to change non-regular files. This is |
||
687 | here especially for configure scripts and kernel builds |
||
688 | which run tests with "ld [...] -o /dev/null". */ |
||
689 | && S_ISREG(buf.st_mode)) |
||
690 | { |
||
5199 | serge | 691 | /* |
692 | unsigned int mask = umask (0); |
||
5197 | serge | 693 | |
5199 | serge | 694 | umask (mask); |
695 | chmod (abfd->filename, |
||
5197 | serge | 696 | (0777 |
697 | & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask)))); |
||
5199 | serge | 698 | */ |
5197 | serge | 699 | } |
700 | } |
||
701 | } |
||
702 | |||
703 | /* |
||
704 | |||
705 | FUNCTION |
||
706 | bfd_close |
||
707 | |||
708 | SYNOPSIS |
||
709 | bfd_boolean bfd_close (bfd *abfd); |
||
710 | |||
711 | DESCRIPTION |
||
712 | |||
713 | Close a BFD. If the BFD was open for writing, then pending |
||
714 | operations are completed and the file written out and closed. |
||
715 | If the created file is executable, then < |
||
716 | to mark it as such. |
||
717 | |||
718 | All memory attached to the BFD is released. |
||
719 | |||
720 | The file descriptor associated with the BFD is closed (even |
||
721 | if it was passed in to BFD by < |
||
722 | |||
723 | RETURNS |
||
724 | < |
||
725 | */ |
||
726 | |||
727 | |||
728 | bfd_boolean |
||
729 | bfd_close (bfd *abfd) |
||
730 | { |
||
731 | bfd_boolean ret; |
||
732 | |||
733 | if (bfd_write_p (abfd)) |
||
734 | { |
||
735 | if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd))) |
||
736 | return FALSE; |
||
737 | } |
||
738 | |||
739 | if (! BFD_SEND (abfd, _close_and_cleanup, (abfd))) |
||
740 | return FALSE; |
||
741 | |||
742 | ret = abfd->iovec->bclose (abfd) == 0; |
||
743 | |||
744 | if (ret) |
||
745 | _maybe_make_executable (abfd); |
||
746 | |||
747 | _bfd_delete_bfd (abfd); |
||
748 | |||
749 | return ret; |
||
750 | } |
||
751 | |||
752 | /* |
||
753 | FUNCTION |
||
754 | bfd_close_all_done |
||
755 | |||
756 | SYNOPSIS |
||
757 | bfd_boolean bfd_close_all_done (bfd *); |
||
758 | |||
759 | DESCRIPTION |
||
760 | Close a BFD. Differs from < |
||
761 | complete any pending operations. This routine would be used |
||
762 | if the application had just used BFD for swapping and didn't |
||
763 | want to use any of the writing code. |
||
764 | |||
765 | If the created file is executable, then < |
||
766 | to mark it as such. |
||
767 | |||
768 | All memory attached to the BFD is released. |
||
769 | |||
770 | RETURNS |
||
771 | < |
||
772 | */ |
||
773 | |||
774 | bfd_boolean |
||
775 | bfd_close_all_done (bfd *abfd) |
||
776 | { |
||
777 | bfd_boolean ret; |
||
778 | |||
779 | ret = bfd_cache_close (abfd); |
||
780 | |||
781 | if (ret) |
||
782 | _maybe_make_executable (abfd); |
||
783 | |||
784 | _bfd_delete_bfd (abfd); |
||
785 | |||
786 | return ret; |
||
787 | } |
||
788 | |||
789 | /* |
||
790 | FUNCTION |
||
791 | bfd_create |
||
792 | |||
793 | SYNOPSIS |
||
794 | bfd *bfd_create (const char *filename, bfd *templ); |
||
795 | |||
796 | DESCRIPTION |
||
797 | Create a new BFD in the manner of < |
||
798 | opening a file. The new BFD takes the target from the target |
||
799 | used by @var{templ}. The format is always set to < |
||
6324 | serge | 800 | |
801 | A copy of the @var{filename} argument is stored in the newly created |
||
802 | BFD. It can be accessed via the bfd_get_filename() macro. |
||
5197 | serge | 803 | */ |
804 | |||
805 | bfd * |
||
806 | bfd_create (const char *filename, bfd *templ) |
||
807 | { |
||
808 | bfd *nbfd; |
||
809 | |||
810 | nbfd = _bfd_new_bfd (); |
||
811 | if (nbfd == NULL) |
||
812 | return NULL; |
||
6324 | serge | 813 | /* PR 11983: Do not cache the original filename, but |
814 | rather make a copy - the original might go away. */ |
||
815 | nbfd->filename = xstrdup (filename); |
||
5197 | serge | 816 | if (templ) |
817 | nbfd->xvec = templ->xvec; |
||
818 | nbfd->direction = no_direction; |
||
819 | bfd_set_format (nbfd, bfd_object); |
||
820 | |||
821 | return nbfd; |
||
822 | } |
||
823 | |||
824 | /* |
||
825 | FUNCTION |
||
826 | bfd_make_writable |
||
827 | |||
828 | SYNOPSIS |
||
829 | bfd_boolean bfd_make_writable (bfd *abfd); |
||
830 | |||
831 | DESCRIPTION |
||
832 | Takes a BFD as created by < |
||
833 | into one like as returned by < |
||
834 | by converting the BFD to BFD_IN_MEMORY. It's assumed that |
||
835 | you will call < |
||
836 | |||
837 | RETURNS |
||
838 | < |
||
839 | */ |
||
840 | |||
841 | bfd_boolean |
||
842 | bfd_make_writable (bfd *abfd) |
||
843 | { |
||
844 | struct bfd_in_memory *bim; |
||
845 | |||
846 | if (abfd->direction != no_direction) |
||
847 | { |
||
848 | bfd_set_error (bfd_error_invalid_operation); |
||
849 | return FALSE; |
||
850 | } |
||
851 | |||
852 | bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory)); |
||
853 | if (bim == NULL) |
||
854 | return FALSE; /* bfd_error already set. */ |
||
855 | abfd->iostream = bim; |
||
856 | /* bfd_bwrite will grow these as needed. */ |
||
857 | bim->size = 0; |
||
858 | bim->buffer = 0; |
||
859 | |||
860 | abfd->flags |= BFD_IN_MEMORY; |
||
861 | abfd->iovec = &_bfd_memory_iovec; |
||
862 | abfd->origin = 0; |
||
863 | abfd->direction = write_direction; |
||
864 | abfd->where = 0; |
||
865 | |||
866 | return TRUE; |
||
867 | } |
||
868 | |||
869 | /* |
||
870 | FUNCTION |
||
871 | bfd_make_readable |
||
872 | |||
873 | SYNOPSIS |
||
874 | bfd_boolean bfd_make_readable (bfd *abfd); |
||
875 | |||
876 | DESCRIPTION |
||
877 | Takes a BFD as created by < |
||
878 | < |
||
879 | returned by < |
||
880 | contents out to the memory buffer, then reversing the |
||
881 | direction. |
||
882 | |||
883 | RETURNS |
||
884 | < |
||
885 | |||
886 | bfd_boolean |
||
887 | bfd_make_readable (bfd *abfd) |
||
888 | { |
||
889 | if (abfd->direction != write_direction || !(abfd->flags & BFD_IN_MEMORY)) |
||
890 | { |
||
891 | bfd_set_error (bfd_error_invalid_operation); |
||
892 | return FALSE; |
||
893 | } |
||
894 | |||
895 | if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd))) |
||
896 | return FALSE; |
||
897 | |||
898 | if (! BFD_SEND (abfd, _close_and_cleanup, (abfd))) |
||
899 | return FALSE; |
||
900 | |||
901 | abfd->arch_info = &bfd_default_arch_struct; |
||
902 | |||
903 | abfd->where = 0; |
||
904 | abfd->format = bfd_unknown; |
||
905 | abfd->my_archive = NULL; |
||
906 | abfd->origin = 0; |
||
907 | abfd->opened_once = FALSE; |
||
908 | abfd->output_has_begun = FALSE; |
||
909 | abfd->section_count = 0; |
||
910 | abfd->usrdata = NULL; |
||
911 | abfd->cacheable = FALSE; |
||
912 | abfd->flags |= BFD_IN_MEMORY; |
||
913 | abfd->mtime_set = FALSE; |
||
914 | |||
915 | abfd->target_defaulted = TRUE; |
||
916 | abfd->direction = read_direction; |
||
917 | abfd->sections = 0; |
||
918 | abfd->symcount = 0; |
||
919 | abfd->outsymbols = 0; |
||
920 | abfd->tdata.any = 0; |
||
921 | |||
922 | bfd_section_list_clear (abfd); |
||
923 | bfd_check_format (abfd, bfd_object); |
||
924 | |||
925 | return TRUE; |
||
926 | } |
||
927 | |||
928 | /* |
||
929 | FUNCTION |
||
930 | bfd_alloc |
||
931 | |||
932 | SYNOPSIS |
||
933 | void *bfd_alloc (bfd *abfd, bfd_size_type wanted); |
||
934 | |||
935 | DESCRIPTION |
||
936 | Allocate a block of @var{wanted} bytes of memory attached to |
||
937 | < |
||
938 | */ |
||
939 | |||
940 | void * |
||
941 | bfd_alloc (bfd *abfd, bfd_size_type size) |
||
942 | { |
||
943 | void *ret; |
||
6324 | serge | 944 | unsigned long ul_size = (unsigned long) size; |
5197 | serge | 945 | |
6324 | serge | 946 | if (size != ul_size |
947 | /* Note - although objalloc_alloc takes an unsigned long as its |
||
948 | argument, internally the size is treated as a signed long. This can |
||
949 | lead to problems where, for example, a request to allocate -1 bytes |
||
950 | can result in just 1 byte being allocated, rather than |
||
951 | ((unsigned long) -1) bytes. Also memory checkers will often |
||
952 | complain about attempts to allocate a negative amount of memory. |
||
953 | So to stop these problems we fail if the size is negative. */ |
||
954 | || ((signed long) ul_size) < 0) |
||
5197 | serge | 955 | { |
956 | bfd_set_error (bfd_error_no_memory); |
||
957 | return NULL; |
||
958 | } |
||
959 | |||
6324 | serge | 960 | ret = objalloc_alloc ((struct objalloc *) abfd->memory, ul_size); |
5197 | serge | 961 | if (ret == NULL) |
962 | bfd_set_error (bfd_error_no_memory); |
||
963 | return ret; |
||
964 | } |
||
965 | |||
966 | /* |
||
967 | INTERNAL_FUNCTION |
||
968 | bfd_alloc2 |
||
969 | |||
970 | SYNOPSIS |
||
971 | void *bfd_alloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size); |
||
972 | |||
973 | DESCRIPTION |
||
974 | Allocate a block of @var{nmemb} elements of @var{size} bytes each |
||
975 | of memory attached to < |
||
976 | */ |
||
977 | |||
978 | void * |
||
979 | bfd_alloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size) |
||
980 | { |
||
981 | if ((nmemb | size) >= HALF_BFD_SIZE_TYPE |
||
982 | && size != 0 |
||
983 | && nmemb > ~(bfd_size_type) 0 / size) |
||
984 | { |
||
985 | bfd_set_error (bfd_error_no_memory); |
||
986 | return NULL; |
||
987 | } |
||
988 | |||
6324 | serge | 989 | return bfd_alloc (abfd, size * nmemb); |
5197 | serge | 990 | } |
991 | |||
992 | /* |
||
993 | FUNCTION |
||
994 | bfd_zalloc |
||
995 | |||
996 | SYNOPSIS |
||
997 | void *bfd_zalloc (bfd *abfd, bfd_size_type wanted); |
||
998 | |||
999 | DESCRIPTION |
||
1000 | Allocate a block of @var{wanted} bytes of zeroed memory |
||
1001 | attached to < |
||
1002 | */ |
||
1003 | |||
1004 | void * |
||
1005 | bfd_zalloc (bfd *abfd, bfd_size_type size) |
||
1006 | { |
||
1007 | void *res; |
||
1008 | |||
1009 | res = bfd_alloc (abfd, size); |
||
1010 | if (res) |
||
1011 | memset (res, 0, (size_t) size); |
||
1012 | return res; |
||
1013 | } |
||
1014 | |||
1015 | /* |
||
1016 | INTERNAL_FUNCTION |
||
1017 | bfd_zalloc2 |
||
1018 | |||
1019 | SYNOPSIS |
||
1020 | void *bfd_zalloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size); |
||
1021 | |||
1022 | DESCRIPTION |
||
1023 | Allocate a block of @var{nmemb} elements of @var{size} bytes each |
||
1024 | of zeroed memory attached to < |
||
1025 | */ |
||
1026 | |||
1027 | void * |
||
1028 | bfd_zalloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size) |
||
1029 | { |
||
1030 | void *res; |
||
1031 | |||
1032 | if ((nmemb | size) >= HALF_BFD_SIZE_TYPE |
||
1033 | && size != 0 |
||
1034 | && nmemb > ~(bfd_size_type) 0 / size) |
||
1035 | { |
||
1036 | bfd_set_error (bfd_error_no_memory); |
||
1037 | return NULL; |
||
1038 | } |
||
1039 | |||
1040 | size *= nmemb; |
||
1041 | |||
1042 | res = bfd_alloc (abfd, size); |
||
1043 | if (res) |
||
1044 | memset (res, 0, (size_t) size); |
||
1045 | return res; |
||
1046 | } |
||
1047 | |||
1048 | /* Free a block allocated for a BFD. |
||
1049 | Note: Also frees all more recently allocated blocks! */ |
||
1050 | |||
1051 | void |
||
1052 | bfd_release (bfd *abfd, void *block) |
||
1053 | { |
||
1054 | objalloc_free_block ((struct objalloc *) abfd->memory, block); |
||
1055 | } |
||
1056 | |||
1057 | |||
1058 | /* |
||
1059 | GNU Extension: separate debug-info files |
||
1060 | |||
1061 | The idea here is that a special section called .gnu_debuglink might be |
||
1062 | embedded in a binary file, which indicates that some *other* file |
||
1063 | contains the real debugging information. This special section contains a |
||
1064 | filename and CRC32 checksum, which we read and resolve to another file, |
||
1065 | if it exists. |
||
1066 | |||
1067 | This facilitates "optional" provision of debugging information, without |
||
1068 | having to provide two complete copies of every binary object (with and |
||
1069 | without debug symbols). */ |
||
1070 | |||
1071 | #define GNU_DEBUGLINK ".gnu_debuglink" |
||
1072 | #define GNU_DEBUGALTLINK ".gnu_debugaltlink" |
||
1073 | |||
1074 | /* |
||
1075 | FUNCTION |
||
1076 | bfd_calc_gnu_debuglink_crc32 |
||
1077 | |||
1078 | SYNOPSIS |
||
1079 | unsigned long bfd_calc_gnu_debuglink_crc32 |
||
1080 | (unsigned long crc, const unsigned char *buf, bfd_size_type len); |
||
1081 | |||
1082 | DESCRIPTION |
||
1083 | Computes a CRC value as used in the .gnu_debuglink section. |
||
1084 | Advances the previously computed @var{crc} value by computing |
||
1085 | and adding in the crc32 for @var{len} bytes of @var{buf}. |
||
1086 | |||
1087 | RETURNS |
||
1088 | Return the updated CRC32 value. |
||
1089 | */ |
||
1090 | |||
1091 | unsigned long |
||
1092 | bfd_calc_gnu_debuglink_crc32 (unsigned long crc, |
||
1093 | const unsigned char *buf, |
||
1094 | bfd_size_type len) |
||
1095 | { |
||
1096 | static const unsigned long crc32_table[256] = |
||
1097 | { |
||
1098 | 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, |
||
1099 | 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, |
||
1100 | 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, |
||
1101 | 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, |
||
1102 | 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, |
||
1103 | 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, |
||
1104 | 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, |
||
1105 | 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, |
||
1106 | 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, |
||
1107 | 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, |
||
1108 | 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, |
||
1109 | 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, |
||
1110 | 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, |
||
1111 | 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, |
||
1112 | 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, |
||
1113 | 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, |
||
1114 | 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, |
||
1115 | 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, |
||
1116 | 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, |
||
1117 | 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, |
||
1118 | 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, |
||
1119 | 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, |
||
1120 | 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, |
||
1121 | 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, |
||
1122 | 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, |
||
1123 | 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, |
||
1124 | 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, |
||
1125 | 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, |
||
1126 | 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, |
||
1127 | 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, |
||
1128 | 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, |
||
1129 | 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, |
||
1130 | 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, |
||
1131 | 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, |
||
1132 | 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, |
||
1133 | 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, |
||
1134 | 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, |
||
1135 | 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, |
||
1136 | 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, |
||
1137 | 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, |
||
1138 | 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, |
||
1139 | 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, |
||
1140 | 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, |
||
1141 | 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, |
||
1142 | 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, |
||
1143 | 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, |
||
1144 | 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, |
||
1145 | 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, |
||
1146 | 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, |
||
1147 | 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, |
||
1148 | 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, |
||
1149 | 0x2d02ef8d |
||
1150 | }; |
||
1151 | const unsigned char *end; |
||
1152 | |||
1153 | crc = ~crc & 0xffffffff; |
||
1154 | for (end = buf + len; buf < end; ++ buf) |
||
1155 | crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8); |
||
1156 | return ~crc & 0xffffffff; |
||
1157 | } |
||
1158 | |||
1159 | |||
1160 | /* |
||
1161 | FUNCTION |
||
1162 | bfd_get_debug_link_info |
||
1163 | |||
1164 | SYNOPSIS |
||
1165 | char *bfd_get_debug_link_info (bfd *abfd, unsigned long *crc32_out); |
||
1166 | |||
1167 | DESCRIPTION |
||
6324 | serge | 1168 | Fetch the filename and CRC32 value for any separate debuginfo |
5197 | serge | 1169 | associated with @var{abfd}. Return NULL if no such info found, |
1170 | otherwise return filename and update @var{crc32_out}. The |
||
1171 | returned filename is allocated with @code{malloc}; freeing it |
||
1172 | is the responsibility of the caller. |
||
1173 | */ |
||
1174 | |||
1175 | char * |
||
1176 | bfd_get_debug_link_info (bfd *abfd, unsigned long *crc32_out) |
||
1177 | { |
||
1178 | asection *sect; |
||
1179 | unsigned long crc32; |
||
1180 | bfd_byte *contents; |
||
6324 | serge | 1181 | unsigned int crc_offset; |
5197 | serge | 1182 | char *name; |
1183 | |||
1184 | BFD_ASSERT (abfd); |
||
1185 | BFD_ASSERT (crc32_out); |
||
1186 | |||
1187 | sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK); |
||
1188 | |||
1189 | if (sect == NULL) |
||
1190 | return NULL; |
||
1191 | |||
1192 | if (!bfd_malloc_and_get_section (abfd, sect, &contents)) |
||
1193 | { |
||
1194 | if (contents != NULL) |
||
1195 | free (contents); |
||
1196 | return NULL; |
||
1197 | } |
||
1198 | |||
6324 | serge | 1199 | /* CRC value is stored after the filename, aligned up to 4 bytes. */ |
5197 | serge | 1200 | name = (char *) contents; |
6324 | serge | 1201 | /* PR 17597: avoid reading off the end of the buffer. */ |
1202 | crc_offset = strnlen (name, bfd_get_section_size (sect)) + 1; |
||
5197 | serge | 1203 | crc_offset = (crc_offset + 3) & ~3; |
6324 | serge | 1204 | if (crc_offset >= bfd_get_section_size (sect)) |
1205 | return NULL; |
||
5197 | serge | 1206 | |
1207 | crc32 = bfd_get_32 (abfd, contents + crc_offset); |
||
1208 | |||
1209 | *crc32_out = crc32; |
||
1210 | return name; |
||
1211 | } |
||
1212 | |||
1213 | /* |
||
1214 | FUNCTION |
||
1215 | bfd_get_alt_debug_link_info |
||
1216 | |||
1217 | SYNOPSIS |
||
6324 | serge | 1218 | char *bfd_get_alt_debug_link_info (bfd * abfd, |
1219 | bfd_size_type *buildid_len, |
||
1220 | bfd_byte **buildid_out); |
||
5197 | serge | 1221 | |
1222 | DESCRIPTION |
||
1223 | Fetch the filename and BuildID value for any alternate debuginfo |
||
1224 | associated with @var{abfd}. Return NULL if no such info found, |
||
6324 | serge | 1225 | otherwise return filename and update @var{buildid_len} and |
1226 | @var{buildid_out}. The returned filename and build_id are |
||
1227 | allocated with @code{malloc}; freeing them is the |
||
1228 | responsibility of the caller. |
||
5197 | serge | 1229 | */ |
1230 | |||
1231 | char * |
||
6324 | serge | 1232 | bfd_get_alt_debug_link_info (bfd * abfd, bfd_size_type *buildid_len, |
1233 | bfd_byte **buildid_out) |
||
5197 | serge | 1234 | { |
1235 | asection *sect; |
||
1236 | bfd_byte *contents; |
||
6324 | serge | 1237 | unsigned int buildid_offset; |
5197 | serge | 1238 | char *name; |
1239 | |||
1240 | BFD_ASSERT (abfd); |
||
6324 | serge | 1241 | BFD_ASSERT (buildid_len); |
5197 | serge | 1242 | BFD_ASSERT (buildid_out); |
1243 | |||
1244 | sect = bfd_get_section_by_name (abfd, GNU_DEBUGALTLINK); |
||
1245 | |||
1246 | if (sect == NULL) |
||
1247 | return NULL; |
||
1248 | |||
1249 | if (!bfd_malloc_and_get_section (abfd, sect, & contents)) |
||
1250 | { |
||
1251 | if (contents != NULL) |
||
1252 | free (contents); |
||
1253 | return NULL; |
||
1254 | } |
||
1255 | |||
6324 | serge | 1256 | /* BuildID value is stored after the filename. */ |
5197 | serge | 1257 | name = (char *) contents; |
6324 | serge | 1258 | buildid_offset = strnlen (name, bfd_get_section_size (sect)) + 1; |
1259 | if (buildid_offset >= bfd_get_section_size (sect)) |
||
1260 | return NULL; |
||
5197 | serge | 1261 | |
6324 | serge | 1262 | *buildid_len = bfd_get_section_size (sect) - buildid_offset; |
1263 | *buildid_out = bfd_malloc (*buildid_len); |
||
1264 | memcpy (*buildid_out, contents + buildid_offset, *buildid_len); |
||
5197 | serge | 1265 | |
1266 | return name; |
||
1267 | } |
||
1268 | |||
1269 | /* |
||
1270 | INTERNAL_FUNCTION |
||
1271 | separate_debug_file_exists |
||
1272 | |||
1273 | SYNOPSIS |
||
1274 | bfd_boolean separate_debug_file_exists |
||
1275 | (char *name, unsigned long crc32); |
||
1276 | |||
1277 | DESCRIPTION |
||
1278 | Checks to see if @var{name} is a file and if its contents |
||
1279 | match @var{crc32}. |
||
1280 | */ |
||
1281 | |||
1282 | static bfd_boolean |
||
1283 | separate_debug_file_exists (const char *name, const unsigned long crc) |
||
1284 | { |
||
1285 | static unsigned char buffer [8 * 1024]; |
||
1286 | unsigned long file_crc = 0; |
||
1287 | FILE *f; |
||
1288 | bfd_size_type count; |
||
1289 | |||
1290 | BFD_ASSERT (name); |
||
1291 | |||
1292 | f = real_fopen (name, FOPEN_RB); |
||
1293 | if (f == NULL) |
||
1294 | return FALSE; |
||
1295 | |||
1296 | while ((count = fread (buffer, 1, sizeof (buffer), f)) > 0) |
||
1297 | file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count); |
||
1298 | |||
1299 | fclose (f); |
||
1300 | |||
1301 | return crc == file_crc; |
||
1302 | } |
||
1303 | |||
1304 | /* |
||
1305 | INTERNAL_FUNCTION |
||
1306 | separate_alt_debug_file_exists |
||
1307 | |||
1308 | SYNOPSIS |
||
1309 | bfd_boolean separate_alt_debug_file_exists |
||
1310 | (char *name, unsigned long crc32); |
||
1311 | |||
1312 | DESCRIPTION |
||
1313 | Checks to see if @var{name} is a file and if its BuildID |
||
1314 | matches @var{buildid}. |
||
1315 | */ |
||
1316 | |||
1317 | static bfd_boolean |
||
1318 | separate_alt_debug_file_exists (const char *name, |
||
1319 | const unsigned long buildid ATTRIBUTE_UNUSED) |
||
1320 | { |
||
1321 | FILE *f; |
||
1322 | |||
1323 | BFD_ASSERT (name); |
||
1324 | |||
1325 | f = real_fopen (name, FOPEN_RB); |
||
1326 | if (f == NULL) |
||
1327 | return FALSE; |
||
1328 | |||
1329 | /* FIXME: Add code to check buildid. */ |
||
1330 | |||
1331 | fclose (f); |
||
1332 | |||
1333 | return TRUE; |
||
1334 | } |
||
1335 | |||
1336 | /* |
||
1337 | INTERNAL_FUNCTION |
||
1338 | find_separate_debug_file |
||
1339 | |||
1340 | SYNOPSIS |
||
1341 | char *find_separate_debug_file (bfd *abfd); |
||
1342 | |||
1343 | DESCRIPTION |
||
1344 | Searches @var{abfd} for a section called @var{section_name} which |
||
1345 | is expected to contain a reference to a file containing separate |
||
1346 | debugging information. The function scans various locations in |
||
1347 | the filesystem, including the file tree rooted at |
||
1348 | @var{debug_file_directory}, and returns the first matching |
||
1349 | filename that it finds. If @var{check_crc} is TRUE then the |
||
1350 | contents of the file must also match the CRC value contained in |
||
1351 | @var{section_name}. Returns NULL if no valid file could be found. |
||
1352 | */ |
||
1353 | |||
1354 | typedef char * (* get_func_type) (bfd *, unsigned long *); |
||
1355 | typedef bfd_boolean (* check_func_type) (const char *, const unsigned long); |
||
1356 | |||
1357 | static char * |
||
1358 | find_separate_debug_file (bfd * abfd, |
||
1359 | const char * debug_file_directory, |
||
1360 | get_func_type get_func, |
||
1361 | check_func_type check_func) |
||
1362 | { |
||
1363 | char *base; |
||
1364 | char *dir; |
||
1365 | char *debugfile; |
||
1366 | char *canon_dir; |
||
1367 | unsigned long crc32; |
||
1368 | size_t dirlen; |
||
1369 | size_t canon_dirlen; |
||
1370 | |||
1371 | BFD_ASSERT (abfd); |
||
1372 | if (debug_file_directory == NULL) |
||
1373 | debug_file_directory = "."; |
||
1374 | |||
1375 | /* BFD may have been opened from a stream. */ |
||
1376 | if (abfd->filename == NULL) |
||
1377 | { |
||
1378 | bfd_set_error (bfd_error_invalid_operation); |
||
1379 | return NULL; |
||
1380 | } |
||
1381 | |||
1382 | base = get_func (abfd, & crc32); |
||
1383 | |||
1384 | if (base == NULL) |
||
1385 | return NULL; |
||
1386 | |||
1387 | if (base[0] == '\0') |
||
1388 | { |
||
1389 | free (base); |
||
1390 | bfd_set_error (bfd_error_no_debug_section); |
||
1391 | return NULL; |
||
1392 | } |
||
1393 | |||
1394 | for (dirlen = strlen (abfd->filename); dirlen > 0; dirlen--) |
||
1395 | if (IS_DIR_SEPARATOR (abfd->filename[dirlen - 1])) |
||
1396 | break; |
||
1397 | |||
1398 | dir = (char *) bfd_malloc (dirlen + 1); |
||
1399 | if (dir == NULL) |
||
1400 | { |
||
1401 | free (base); |
||
1402 | return NULL; |
||
1403 | } |
||
1404 | memcpy (dir, abfd->filename, dirlen); |
||
1405 | dir[dirlen] = '\0'; |
||
1406 | |||
1407 | /* Compute the canonical name of the bfd object with all symbolic links |
||
1408 | resolved, for use in the global debugfile directory. */ |
||
1409 | canon_dir = lrealpath (abfd->filename); |
||
1410 | for (canon_dirlen = strlen (canon_dir); canon_dirlen > 0; canon_dirlen--) |
||
1411 | if (IS_DIR_SEPARATOR (canon_dir[canon_dirlen - 1])) |
||
1412 | break; |
||
1413 | canon_dir[canon_dirlen] = '\0'; |
||
1414 | |||
1415 | debugfile = (char *) |
||
1416 | bfd_malloc (strlen (debug_file_directory) + 1 |
||
1417 | + (canon_dirlen > dirlen ? canon_dirlen : dirlen) |
||
1418 | + strlen (".debug/") |
||
1419 | + strlen (base) |
||
1420 | + 1); |
||
1421 | if (debugfile == NULL) |
||
1422 | goto found; /* Actually this returns NULL. */ |
||
1423 | |||
1424 | /* First try in the same directory as the original file: */ |
||
1425 | strcpy (debugfile, dir); |
||
1426 | strcat (debugfile, base); |
||
1427 | |||
1428 | if (check_func (debugfile, crc32)) |
||
1429 | goto found; |
||
1430 | |||
1431 | /* Then try in a subdirectory called .debug. */ |
||
1432 | strcpy (debugfile, dir); |
||
1433 | strcat (debugfile, ".debug/"); |
||
1434 | strcat (debugfile, base); |
||
1435 | |||
1436 | if (check_func (debugfile, crc32)) |
||
1437 | goto found; |
||
1438 | |||
1439 | /* Then try in the global debugfile directory. */ |
||
1440 | strcpy (debugfile, debug_file_directory); |
||
1441 | dirlen = strlen (debug_file_directory) - 1; |
||
1442 | if (dirlen > 0 |
||
1443 | && debug_file_directory[dirlen] != '/' |
||
1444 | && canon_dir[0] != '/') |
||
1445 | strcat (debugfile, "/"); |
||
1446 | strcat (debugfile, canon_dir); |
||
1447 | strcat (debugfile, base); |
||
1448 | |||
1449 | if (check_func (debugfile, crc32)) |
||
1450 | goto found; |
||
1451 | |||
1452 | /* Failed to find the file. */ |
||
1453 | free (debugfile); |
||
1454 | debugfile = NULL; |
||
1455 | |||
1456 | found: |
||
1457 | free (base); |
||
1458 | free (dir); |
||
1459 | free (canon_dir); |
||
1460 | return debugfile; |
||
1461 | } |
||
1462 | |||
1463 | |||
1464 | /* |
||
1465 | FUNCTION |
||
1466 | bfd_follow_gnu_debuglink |
||
1467 | |||
1468 | SYNOPSIS |
||
1469 | char *bfd_follow_gnu_debuglink (bfd *abfd, const char *dir); |
||
1470 | |||
1471 | DESCRIPTION |
||
1472 | |||
1473 | Takes a BFD and searches it for a .gnu_debuglink section. If this |
||
1474 | section is found, it examines the section for the name and checksum |
||
1475 | of a '.debug' file containing auxiliary debugging information. It |
||
1476 | then searches the filesystem for this .debug file in some standard |
||
1477 | locations, including the directory tree rooted at @var{dir}, and if |
||
1478 | found returns the full filename. |
||
1479 | |||
1480 | If @var{dir} is NULL, it will search a default path configured into |
||
1481 | libbfd at build time. [XXX this feature is not currently |
||
1482 | implemented]. |
||
1483 | |||
1484 | RETURNS |
||
1485 | < |
||
1486 | otherwise a pointer to a heap-allocated string containing the |
||
1487 | filename. The caller is responsible for freeing this string. |
||
1488 | */ |
||
1489 | |||
1490 | char * |
||
1491 | bfd_follow_gnu_debuglink (bfd *abfd, const char *dir) |
||
1492 | { |
||
1493 | return find_separate_debug_file (abfd, dir, |
||
1494 | bfd_get_debug_link_info, |
||
1495 | separate_debug_file_exists); |
||
1496 | } |
||
1497 | |||
6324 | serge | 1498 | /* Helper for bfd_follow_gnu_debugaltlink. It just pretends to return |
1499 | a CRC. .gnu_debugaltlink supplies a build-id, which is different, |
||
1500 | but this is ok because separate_alt_debug_file_exists ignores the |
||
1501 | CRC anyway. */ |
||
1502 | |||
1503 | static char * |
||
1504 | get_alt_debug_link_info_shim (bfd * abfd, unsigned long *crc32_out) |
||
1505 | { |
||
1506 | bfd_size_type len; |
||
1507 | bfd_byte *buildid = NULL; |
||
1508 | char *result = bfd_get_alt_debug_link_info (abfd, &len, &buildid); |
||
1509 | |||
1510 | *crc32_out = 0; |
||
1511 | free (buildid); |
||
1512 | |||
1513 | return result; |
||
1514 | } |
||
1515 | |||
5197 | serge | 1516 | /* |
1517 | FUNCTION |
||
1518 | bfd_follow_gnu_debugaltlink |
||
1519 | |||
1520 | SYNOPSIS |
||
1521 | char *bfd_follow_gnu_debugaltlink (bfd *abfd, const char *dir); |
||
1522 | |||
1523 | DESCRIPTION |
||
1524 | |||
1525 | Takes a BFD and searches it for a .gnu_debugaltlink section. If this |
||
1526 | section is found, it examines the section for the name of a file |
||
1527 | containing auxiliary debugging information. It then searches the |
||
1528 | filesystem for this file in a set of standard locations, including |
||
1529 | the directory tree rooted at @var{dir}, and if found returns the |
||
1530 | full filename. |
||
1531 | |||
1532 | If @var{dir} is NULL, it will search a default path configured into |
||
1533 | libbfd at build time. [FIXME: This feature is not currently |
||
1534 | implemented]. |
||
1535 | |||
1536 | RETURNS |
||
1537 | < |
||
1538 | otherwise a pointer to a heap-allocated string containing the |
||
1539 | filename. The caller is responsible for freeing this string. |
||
1540 | */ |
||
1541 | |||
1542 | char * |
||
1543 | bfd_follow_gnu_debugaltlink (bfd *abfd, const char *dir) |
||
1544 | { |
||
1545 | return find_separate_debug_file (abfd, dir, |
||
6324 | serge | 1546 | get_alt_debug_link_info_shim, |
5197 | serge | 1547 | separate_alt_debug_file_exists); |
1548 | } |
||
1549 | |||
1550 | /* |
||
1551 | FUNCTION |
||
1552 | bfd_create_gnu_debuglink_section |
||
1553 | |||
1554 | SYNOPSIS |
||
1555 | struct bfd_section *bfd_create_gnu_debuglink_section |
||
1556 | (bfd *abfd, const char *filename); |
||
1557 | |||
1558 | DESCRIPTION |
||
1559 | |||
1560 | Takes a @var{BFD} and adds a .gnu_debuglink section to it. The section is sized |
||
1561 | to be big enough to contain a link to the specified @var{filename}. |
||
1562 | |||
1563 | RETURNS |
||
1564 | A pointer to the new section is returned if all is ok. Otherwise < |
||
1565 | returned and bfd_error is set. |
||
1566 | */ |
||
1567 | |||
1568 | asection * |
||
1569 | bfd_create_gnu_debuglink_section (bfd *abfd, const char *filename) |
||
1570 | { |
||
1571 | asection *sect; |
||
1572 | bfd_size_type debuglink_size; |
||
1573 | flagword flags; |
||
1574 | |||
1575 | if (abfd == NULL || filename == NULL) |
||
1576 | { |
||
1577 | bfd_set_error (bfd_error_invalid_operation); |
||
1578 | return NULL; |
||
1579 | } |
||
1580 | |||
1581 | /* Strip off any path components in filename. */ |
||
1582 | filename = lbasename (filename); |
||
1583 | |||
1584 | sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK); |
||
1585 | if (sect) |
||
1586 | { |
||
1587 | /* Section already exists. */ |
||
1588 | bfd_set_error (bfd_error_invalid_operation); |
||
1589 | return NULL; |
||
1590 | } |
||
1591 | |||
1592 | flags = SEC_HAS_CONTENTS | SEC_READONLY | SEC_DEBUGGING; |
||
1593 | sect = bfd_make_section_with_flags (abfd, GNU_DEBUGLINK, flags); |
||
1594 | if (sect == NULL) |
||
1595 | return NULL; |
||
1596 | |||
1597 | debuglink_size = strlen (filename) + 1; |
||
1598 | debuglink_size += 3; |
||
1599 | debuglink_size &= ~3; |
||
1600 | debuglink_size += 4; |
||
1601 | |||
1602 | if (! bfd_set_section_size (abfd, sect, debuglink_size)) |
||
1603 | /* XXX Should we delete the section from the bfd ? */ |
||
1604 | return NULL; |
||
1605 | |||
1606 | return sect; |
||
1607 | } |
||
1608 | |||
1609 | |||
1610 | /* |
||
1611 | FUNCTION |
||
1612 | bfd_fill_in_gnu_debuglink_section |
||
1613 | |||
1614 | SYNOPSIS |
||
1615 | bfd_boolean bfd_fill_in_gnu_debuglink_section |
||
1616 | (bfd *abfd, struct bfd_section *sect, const char *filename); |
||
1617 | |||
1618 | DESCRIPTION |
||
1619 | |||
1620 | Takes a @var{BFD} and containing a .gnu_debuglink section @var{SECT} |
||
1621 | and fills in the contents of the section to contain a link to the |
||
1622 | specified @var{filename}. The filename should be relative to the |
||
1623 | current directory. |
||
1624 | |||
1625 | RETURNS |
||
1626 | < |
||
1627 | and bfd_error is set. |
||
1628 | */ |
||
1629 | |||
1630 | bfd_boolean |
||
1631 | bfd_fill_in_gnu_debuglink_section (bfd *abfd, |
||
1632 | struct bfd_section *sect, |
||
1633 | const char *filename) |
||
1634 | { |
||
1635 | bfd_size_type debuglink_size; |
||
1636 | unsigned long crc32; |
||
1637 | char * contents; |
||
1638 | bfd_size_type crc_offset; |
||
1639 | FILE * handle; |
||
1640 | static unsigned char buffer[8 * 1024]; |
||
1641 | size_t count; |
||
1642 | size_t filelen; |
||
1643 | |||
1644 | if (abfd == NULL || sect == NULL || filename == NULL) |
||
1645 | { |
||
1646 | bfd_set_error (bfd_error_invalid_operation); |
||
1647 | return FALSE; |
||
1648 | } |
||
1649 | |||
1650 | /* Make sure that we can read the file. |
||
1651 | XXX - Should we attempt to locate the debug info file using the same |
||
1652 | algorithm as gdb ? At the moment, since we are creating the |
||
1653 | .gnu_debuglink section, we insist upon the user providing us with a |
||
1654 | correct-for-section-creation-time path, but this need not conform to |
||
1655 | the gdb location algorithm. */ |
||
1656 | handle = real_fopen (filename, FOPEN_RB); |
||
1657 | if (handle == NULL) |
||
1658 | { |
||
1659 | bfd_set_error (bfd_error_system_call); |
||
1660 | return FALSE; |
||
1661 | } |
||
1662 | |||
1663 | crc32 = 0; |
||
1664 | while ((count = fread (buffer, 1, sizeof buffer, handle)) > 0) |
||
1665 | crc32 = bfd_calc_gnu_debuglink_crc32 (crc32, buffer, count); |
||
1666 | fclose (handle); |
||
1667 | |||
1668 | /* Strip off any path components in filename, |
||
1669 | now that we no longer need them. */ |
||
1670 | filename = lbasename (filename); |
||
1671 | |||
1672 | filelen = strlen (filename); |
||
1673 | debuglink_size = filelen + 1; |
||
1674 | debuglink_size += 3; |
||
1675 | debuglink_size &= ~3; |
||
1676 | debuglink_size += 4; |
||
1677 | |||
1678 | contents = (char *) bfd_malloc (debuglink_size); |
||
1679 | if (contents == NULL) |
||
1680 | { |
||
1681 | /* XXX Should we delete the section from the bfd ? */ |
||
1682 | return FALSE; |
||
1683 | } |
||
1684 | |||
1685 | crc_offset = debuglink_size - 4; |
||
1686 | memcpy (contents, filename, filelen); |
||
1687 | memset (contents + filelen, 0, crc_offset - filelen); |
||
1688 | |||
1689 | bfd_put_32 (abfd, crc32, contents + crc_offset); |
||
1690 | |||
1691 | if (! bfd_set_section_contents (abfd, sect, contents, 0, debuglink_size)) |
||
1692 | { |
||
1693 | /* XXX Should we delete the section from the bfd ? */ |
||
1694 | free (contents); |
||
1695 | return FALSE; |
||
1696 | } |
||
1697 | |||
1698 | return TRUE; |
||
1699 | } |