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Rev | Author | Line No. | Line |
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5197 | serge | 1 | /* Compressed section support (intended for debug sections). |
6324 | serge | 2 | Copyright (C) 2008-2015 Free Software Foundation, Inc. |
5197 | serge | 3 | |
4 | This file is part of BFD, the Binary File Descriptor library. |
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5 | |||
6 | This program is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 3 of the License, or |
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9 | (at your option) any later version. |
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10 | |||
11 | This program is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | GNU General Public License for more details. |
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15 | |||
16 | You should have received a copy of the GNU General Public License |
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17 | along with this program; if not, write to the Free Software |
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18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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19 | MA 02110-1301, USA. */ |
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20 | |||
21 | #include "sysdep.h" |
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6324 | serge | 22 | #include |
5197 | serge | 23 | #include "bfd.h" |
24 | #include "libbfd.h" |
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6324 | serge | 25 | #include "safe-ctype.h" |
5197 | serge | 26 | |
6324 | serge | 27 | #define MAX_COMPRESSION_HEADER_SIZE 24 |
28 | |||
5197 | serge | 29 | static bfd_boolean |
30 | decompress_contents (bfd_byte *compressed_buffer, |
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31 | bfd_size_type compressed_size, |
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32 | bfd_byte *uncompressed_buffer, |
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33 | bfd_size_type uncompressed_size) |
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34 | { |
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35 | z_stream strm; |
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36 | int rc; |
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37 | |||
38 | /* It is possible the section consists of several compressed |
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39 | buffers concatenated together, so we uncompress in a loop. */ |
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6324 | serge | 40 | /* PR 18313: The state field in the z_stream structure is supposed |
41 | to be invisible to the user (ie us), but some compilers will |
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42 | still complain about it being used without initialisation. So |
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43 | we first zero the entire z_stream structure and then set the fields |
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44 | that we need. */ |
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45 | memset (& strm, 0, sizeof strm); |
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46 | strm.avail_in = compressed_size; |
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47 | strm.next_in = (Bytef*) compressed_buffer; |
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5197 | serge | 48 | strm.avail_out = uncompressed_size; |
49 | |||
50 | BFD_ASSERT (Z_OK == 0); |
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51 | rc = inflateInit (&strm); |
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52 | while (strm.avail_in > 0 && strm.avail_out > 0) |
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53 | { |
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54 | if (rc != Z_OK) |
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55 | break; |
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56 | strm.next_out = ((Bytef*) uncompressed_buffer |
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57 | + (uncompressed_size - strm.avail_out)); |
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58 | rc = inflate (&strm, Z_FINISH); |
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59 | if (rc != Z_STREAM_END) |
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60 | break; |
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61 | rc = inflateReset (&strm); |
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62 | } |
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63 | rc |= inflateEnd (&strm); |
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64 | return rc == Z_OK && strm.avail_out == 0; |
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65 | } |
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66 | |||
6324 | serge | 67 | /* Compress data of the size specified in @var{uncompressed_size} |
5197 | serge | 68 | and pointed to by @var{uncompressed_buffer} using zlib and store |
69 | as the contents field. This function assumes the contents |
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6324 | serge | 70 | field was allocated using bfd_malloc() or equivalent. |
5197 | serge | 71 | |
6324 | serge | 72 | Return the uncompressed size if the full section contents is |
73 | compressed successfully. Otherwise return 0. */ |
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5197 | serge | 74 | |
6324 | serge | 75 | static bfd_size_type |
76 | bfd_compress_section_contents (bfd *abfd, sec_ptr sec, |
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77 | bfd_byte *uncompressed_buffer, |
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78 | bfd_size_type uncompressed_size) |
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5197 | serge | 79 | { |
80 | uLong compressed_size; |
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6324 | serge | 81 | bfd_byte *buffer; |
82 | bfd_size_type buffer_size; |
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83 | bfd_boolean decompress; |
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84 | int zlib_size = 0; |
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85 | int orig_compression_header_size; |
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86 | bfd_size_type orig_uncompressed_size; |
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87 | int header_size = bfd_get_compression_header_size (abfd, NULL); |
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88 | bfd_boolean compressed |
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89 | = bfd_is_section_compressed_with_header (abfd, sec, |
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90 | &orig_compression_header_size, |
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91 | &orig_uncompressed_size); |
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5197 | serge | 92 | |
6324 | serge | 93 | /* Either ELF compression header or the 12-byte, "ZLIB" + 8-byte size, |
94 | overhead in .zdebug* section. */ |
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95 | if (!header_size) |
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96 | header_size = 12; |
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5197 | serge | 97 | |
6324 | serge | 98 | if (compressed) |
99 | { |
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100 | /* We shouldn't decompress unsupported compressed section. */ |
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101 | if (orig_compression_header_size < 0) |
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102 | abort (); |
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5197 | serge | 103 | |
6324 | serge | 104 | /* Different compression schemes. Just move the compressed section |
105 | contents to the right position. */ |
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106 | if (orig_compression_header_size == 0) |
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107 | { |
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108 | /* Convert it from .zdebug* section. Get the uncompressed |
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109 | size first. We need to substract the 12-byte overhead in |
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110 | .zdebug* section. Set orig_compression_header_size to |
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111 | the 12-bye overhead. */ |
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112 | orig_compression_header_size = 12; |
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113 | zlib_size = uncompressed_size - 12; |
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114 | } |
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115 | else |
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116 | { |
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117 | /* Convert it to .zdebug* section. */ |
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118 | zlib_size = uncompressed_size - orig_compression_header_size; |
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119 | } |
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120 | |||
121 | /* Add the header size. */ |
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122 | compressed_size = zlib_size + header_size; |
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123 | } |
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124 | else |
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125 | compressed_size = compressBound (uncompressed_size) + header_size; |
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126 | |||
127 | /* Uncompress if it leads to smaller size. */ |
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128 | if (compressed && compressed_size > orig_uncompressed_size) |
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129 | { |
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130 | decompress = TRUE; |
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131 | buffer_size = orig_uncompressed_size; |
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132 | } |
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133 | else |
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134 | { |
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135 | decompress = FALSE; |
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136 | buffer_size = compressed_size; |
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137 | } |
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138 | buffer = (bfd_byte *) bfd_alloc (abfd, buffer_size); |
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139 | if (buffer == NULL) |
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140 | return 0; |
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141 | |||
142 | if (compressed) |
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143 | { |
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144 | sec->size = orig_uncompressed_size; |
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145 | if (decompress) |
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146 | { |
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147 | if (!decompress_contents (uncompressed_buffer |
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148 | + orig_compression_header_size, |
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149 | zlib_size, buffer, buffer_size)) |
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150 | { |
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151 | bfd_set_error (bfd_error_bad_value); |
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152 | bfd_release (abfd, buffer); |
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153 | return 0; |
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154 | } |
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155 | free (uncompressed_buffer); |
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156 | sec->contents = buffer; |
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157 | sec->compress_status = COMPRESS_SECTION_DONE; |
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158 | return orig_uncompressed_size; |
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159 | } |
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160 | else |
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161 | { |
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162 | bfd_update_compression_header (abfd, buffer, sec); |
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163 | memmove (buffer + header_size, |
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164 | uncompressed_buffer + orig_compression_header_size, |
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165 | zlib_size); |
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166 | } |
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167 | } |
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168 | else |
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169 | { |
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170 | if (compress ((Bytef*) buffer + header_size, |
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5197 | serge | 171 | &compressed_size, |
172 | (const Bytef*) uncompressed_buffer, |
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173 | uncompressed_size) != Z_OK) |
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174 | { |
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6324 | serge | 175 | bfd_release (abfd, buffer); |
5197 | serge | 176 | bfd_set_error (bfd_error_bad_value); |
6324 | serge | 177 | return 0; |
5197 | serge | 178 | } |
179 | |||
6324 | serge | 180 | compressed_size += header_size; |
181 | /* PR binutils/18087: If compression didn't make the section smaller, |
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182 | just keep it uncompressed. */ |
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183 | if (compressed_size < uncompressed_size) |
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184 | bfd_update_compression_header (abfd, buffer, sec); |
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185 | else |
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186 | { |
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187 | /* NOTE: There is a small memory leak here since |
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188 | uncompressed_buffer is malloced and won't be freed. */ |
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189 | bfd_release (abfd, buffer); |
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190 | sec->contents = uncompressed_buffer; |
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191 | sec->compress_status = COMPRESS_SECTION_NONE; |
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192 | return uncompressed_size; |
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193 | } |
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194 | } |
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5197 | serge | 195 | |
196 | free (uncompressed_buffer); |
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6324 | serge | 197 | sec->contents = buffer; |
5197 | serge | 198 | sec->size = compressed_size; |
199 | sec->compress_status = COMPRESS_SECTION_DONE; |
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200 | |||
6324 | serge | 201 | return uncompressed_size; |
5197 | serge | 202 | } |
203 | |||
204 | /* |
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205 | FUNCTION |
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206 | bfd_get_full_section_contents |
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207 | |||
208 | SYNOPSIS |
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209 | bfd_boolean bfd_get_full_section_contents |
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210 | (bfd *abfd, asection *section, bfd_byte **ptr); |
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211 | |||
212 | DESCRIPTION |
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213 | Read all data from @var{section} in BFD @var{abfd}, decompress |
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214 | if needed, and store in @var{*ptr}. If @var{*ptr} is NULL, |
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215 | return @var{*ptr} with memory malloc'd by this function. |
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216 | |||
217 | Return @code{TRUE} if the full section contents is retrieved |
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6324 | serge | 218 | successfully. If the section has no contents then this function |
219 | returns @code{TRUE} but @var{*ptr} is set to NULL. |
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5197 | serge | 220 | */ |
221 | |||
222 | bfd_boolean |
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223 | bfd_get_full_section_contents (bfd *abfd, sec_ptr sec, bfd_byte **ptr) |
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224 | { |
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225 | bfd_size_type sz; |
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226 | bfd_byte *p = *ptr; |
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227 | bfd_boolean ret; |
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228 | bfd_size_type save_size; |
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229 | bfd_size_type save_rawsize; |
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230 | bfd_byte *compressed_buffer; |
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6324 | serge | 231 | unsigned int compression_header_size; |
5197 | serge | 232 | |
233 | if (abfd->direction != write_direction && sec->rawsize != 0) |
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234 | sz = sec->rawsize; |
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235 | else |
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236 | sz = sec->size; |
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237 | if (sz == 0) |
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6324 | serge | 238 | { |
239 | *ptr = NULL; |
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5197 | serge | 240 | return TRUE; |
6324 | serge | 241 | } |
5197 | serge | 242 | |
243 | switch (sec->compress_status) |
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244 | { |
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245 | case COMPRESS_SECTION_NONE: |
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246 | if (p == NULL) |
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247 | { |
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248 | p = (bfd_byte *) bfd_malloc (sz); |
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249 | if (p == NULL) |
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250 | return FALSE; |
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251 | } |
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6324 | serge | 252 | |
5197 | serge | 253 | if (!bfd_get_section_contents (abfd, sec, p, 0, sz)) |
254 | { |
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255 | if (*ptr != p) |
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256 | free (p); |
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257 | return FALSE; |
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258 | } |
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259 | *ptr = p; |
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260 | return TRUE; |
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261 | |||
262 | case DECOMPRESS_SECTION_SIZED: |
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263 | /* Read in the full compressed section contents. */ |
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264 | compressed_buffer = (bfd_byte *) bfd_malloc (sec->compressed_size); |
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265 | if (compressed_buffer == NULL) |
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266 | return FALSE; |
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267 | save_rawsize = sec->rawsize; |
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268 | save_size = sec->size; |
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269 | /* Clear rawsize, set size to compressed size and set compress_status |
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270 | to COMPRESS_SECTION_NONE. If the compressed size is bigger than |
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271 | the uncompressed size, bfd_get_section_contents will fail. */ |
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272 | sec->rawsize = 0; |
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273 | sec->size = sec->compressed_size; |
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274 | sec->compress_status = COMPRESS_SECTION_NONE; |
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275 | ret = bfd_get_section_contents (abfd, sec, compressed_buffer, |
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276 | 0, sec->compressed_size); |
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277 | /* Restore rawsize and size. */ |
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278 | sec->rawsize = save_rawsize; |
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279 | sec->size = save_size; |
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280 | sec->compress_status = DECOMPRESS_SECTION_SIZED; |
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281 | if (!ret) |
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282 | goto fail_compressed; |
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283 | |||
284 | if (p == NULL) |
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285 | p = (bfd_byte *) bfd_malloc (sz); |
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286 | if (p == NULL) |
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287 | goto fail_compressed; |
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288 | |||
6324 | serge | 289 | compression_header_size = bfd_get_compression_header_size (abfd, sec); |
290 | if (compression_header_size == 0) |
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291 | /* Set header size to the zlib header size if it is a |
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292 | SHF_COMPRESSED section. */ |
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293 | compression_header_size = 12; |
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294 | if (!decompress_contents (compressed_buffer + compression_header_size, |
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295 | sec->compressed_size, p, sz)) |
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5197 | serge | 296 | { |
297 | bfd_set_error (bfd_error_bad_value); |
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298 | if (p != *ptr) |
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299 | free (p); |
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300 | fail_compressed: |
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301 | free (compressed_buffer); |
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302 | return FALSE; |
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303 | } |
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304 | |||
305 | free (compressed_buffer); |
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306 | *ptr = p; |
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307 | return TRUE; |
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308 | |||
309 | case COMPRESS_SECTION_DONE: |
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6324 | serge | 310 | if (sec->contents == NULL) |
311 | return FALSE; |
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5197 | serge | 312 | if (p == NULL) |
313 | { |
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314 | p = (bfd_byte *) bfd_malloc (sz); |
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315 | if (p == NULL) |
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316 | return FALSE; |
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317 | *ptr = p; |
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318 | } |
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6324 | serge | 319 | /* PR 17512; file: 5bc29788. */ |
320 | if (p != sec->contents) |
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5197 | serge | 321 | memcpy (p, sec->contents, sz); |
322 | return TRUE; |
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323 | |||
324 | default: |
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325 | abort (); |
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326 | } |
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327 | } |
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328 | |||
329 | /* |
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330 | FUNCTION |
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331 | bfd_cache_section_contents |
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332 | |||
333 | SYNOPSIS |
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334 | void bfd_cache_section_contents |
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335 | (asection *sec, void *contents); |
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336 | |||
337 | DESCRIPTION |
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338 | Stash @var(contents) so any following reads of @var(sec) do |
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339 | not need to decompress again. |
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340 | */ |
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341 | |||
342 | void |
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343 | bfd_cache_section_contents (asection *sec, void *contents) |
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344 | { |
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345 | if (sec->compress_status == DECOMPRESS_SECTION_SIZED) |
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346 | sec->compress_status = COMPRESS_SECTION_DONE; |
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347 | sec->contents = contents; |
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348 | sec->flags |= SEC_IN_MEMORY; |
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349 | } |
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350 | |||
351 | /* |
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352 | FUNCTION |
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6324 | serge | 353 | bfd_is_section_compressed_with_header |
5197 | serge | 354 | |
355 | SYNOPSIS |
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6324 | serge | 356 | bfd_boolean bfd_is_section_compressed_with_header |
357 | (bfd *abfd, asection *section, |
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358 | int *compression_header_size_p, |
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359 | bfd_size_type *uncompressed_size_p); |
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5197 | serge | 360 | |
361 | DESCRIPTION |
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6324 | serge | 362 | Return @code{TRUE} if @var{section} is compressed. Compression |
363 | header size is returned in @var{compression_header_size_p} and |
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364 | uncompressed size is returned in @var{uncompressed_size_p}. If |
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365 | compression is unsupported, compression header size is returned |
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366 | with -1 and uncompressed size is returned with 0. |
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5197 | serge | 367 | */ |
368 | |||
369 | bfd_boolean |
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6324 | serge | 370 | bfd_is_section_compressed_with_header (bfd *abfd, sec_ptr sec, |
371 | int *compression_header_size_p, |
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372 | bfd_size_type *uncompressed_size_p) |
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5197 | serge | 373 | { |
6324 | serge | 374 | bfd_byte header[MAX_COMPRESSION_HEADER_SIZE]; |
375 | int compression_header_size; |
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376 | int header_size; |
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5197 | serge | 377 | unsigned int saved = sec->compress_status; |
378 | bfd_boolean compressed; |
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379 | |||
6324 | serge | 380 | compression_header_size = bfd_get_compression_header_size (abfd, sec); |
381 | if (compression_header_size > MAX_COMPRESSION_HEADER_SIZE) |
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382 | abort (); |
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383 | header_size = compression_header_size ? compression_header_size : 12; |
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384 | |||
5197 | serge | 385 | /* Don't decompress the section. */ |
386 | sec->compress_status = COMPRESS_SECTION_NONE; |
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387 | |||
6324 | serge | 388 | /* Read the header. */ |
389 | if (bfd_get_section_contents (abfd, sec, header, 0, header_size)) |
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390 | { |
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391 | if (compression_header_size == 0) |
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392 | /* In this case, it should be "ZLIB" followed by the uncompressed |
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393 | section size, 8 bytes in big-endian order. */ |
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394 | compressed = CONST_STRNEQ ((char*) header , "ZLIB"); |
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395 | else |
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396 | compressed = TRUE; |
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397 | } |
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398 | else |
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399 | compressed = FALSE; |
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5197 | serge | 400 | |
6324 | serge | 401 | *uncompressed_size_p = sec->size; |
402 | if (compressed) |
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403 | { |
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404 | if (compression_header_size != 0) |
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405 | { |
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406 | if (!bfd_check_compression_header (abfd, header, sec, |
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407 | uncompressed_size_p)) |
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408 | compression_header_size = -1; |
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409 | } |
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410 | /* Check for the pathalogical case of a debug string section that |
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411 | contains the string ZLIB.... as the first entry. We assume that |
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412 | no uncompressed .debug_str section would ever be big enough to |
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413 | have the first byte of its (big-endian) size be non-zero. */ |
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414 | else if (strcmp (sec->name, ".debug_str") == 0 |
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415 | && ISPRINT (header[4])) |
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416 | compressed = FALSE; |
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417 | else |
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418 | *uncompressed_size_p = bfd_getb64 (header + 4); |
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419 | } |
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420 | |||
5197 | serge | 421 | /* Restore compress_status. */ |
422 | sec->compress_status = saved; |
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6324 | serge | 423 | *compression_header_size_p = compression_header_size; |
5197 | serge | 424 | return compressed; |
425 | } |
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426 | |||
427 | /* |
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428 | FUNCTION |
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6324 | serge | 429 | bfd_is_section_compressed |
430 | |||
431 | SYNOPSIS |
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432 | bfd_boolean bfd_is_section_compressed |
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433 | (bfd *abfd, asection *section); |
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434 | |||
435 | DESCRIPTION |
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436 | Return @code{TRUE} if @var{section} is compressed. |
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437 | */ |
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438 | |||
439 | bfd_boolean |
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440 | bfd_is_section_compressed (bfd *abfd, sec_ptr sec) |
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441 | { |
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442 | int compression_header_size; |
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443 | bfd_size_type uncompressed_size; |
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444 | return (bfd_is_section_compressed_with_header (abfd, sec, |
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445 | &compression_header_size, |
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446 | &uncompressed_size) |
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447 | && compression_header_size >= 0 |
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448 | && uncompressed_size > 0); |
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449 | } |
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450 | |||
451 | /* |
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452 | FUNCTION |
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5197 | serge | 453 | bfd_init_section_decompress_status |
454 | |||
455 | SYNOPSIS |
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456 | bfd_boolean bfd_init_section_decompress_status |
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457 | (bfd *abfd, asection *section); |
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458 | |||
459 | DESCRIPTION |
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460 | Record compressed section size, update section size with |
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461 | decompressed size and set compress_status to |
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462 | DECOMPRESS_SECTION_SIZED. |
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463 | |||
464 | Return @code{FALSE} if the section is not a valid compressed |
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6324 | serge | 465 | section. Otherwise, return @code{TRUE}. |
5197 | serge | 466 | */ |
467 | |||
468 | bfd_boolean |
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6324 | serge | 469 | bfd_init_section_decompress_status (bfd *abfd, sec_ptr sec) |
5197 | serge | 470 | { |
6324 | serge | 471 | bfd_byte header[MAX_COMPRESSION_HEADER_SIZE]; |
472 | int compression_header_size; |
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473 | int header_size; |
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5197 | serge | 474 | bfd_size_type uncompressed_size; |
475 | |||
6324 | serge | 476 | compression_header_size = bfd_get_compression_header_size (abfd, sec); |
477 | if (compression_header_size > MAX_COMPRESSION_HEADER_SIZE) |
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478 | abort (); |
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479 | header_size = compression_header_size ? compression_header_size : 12; |
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480 | |||
481 | /* Read the header. */ |
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5197 | serge | 482 | if (sec->rawsize != 0 |
483 | || sec->contents != NULL |
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484 | || sec->compress_status != COMPRESS_SECTION_NONE |
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6324 | serge | 485 | || !bfd_get_section_contents (abfd, sec, header, 0, header_size)) |
5197 | serge | 486 | { |
487 | bfd_set_error (bfd_error_invalid_operation); |
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488 | return FALSE; |
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489 | } |
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490 | |||
6324 | serge | 491 | if (compression_header_size == 0) |
5197 | serge | 492 | { |
6324 | serge | 493 | /* In this case, it should be "ZLIB" followed by the uncompressed |
494 | section size, 8 bytes in big-endian order. */ |
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495 | if (! CONST_STRNEQ ((char*) header, "ZLIB")) |
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496 | { |
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5197 | serge | 497 | bfd_set_error (bfd_error_wrong_format); |
498 | return FALSE; |
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499 | } |
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6324 | serge | 500 | uncompressed_size = bfd_getb64 (header + 4); |
501 | } |
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502 | else if (!bfd_check_compression_header (abfd, header, sec, |
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503 | &uncompressed_size)) |
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504 | { |
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505 | bfd_set_error (bfd_error_wrong_format); |
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506 | return FALSE; |
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507 | } |
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5197 | serge | 508 | |
509 | sec->compressed_size = sec->size; |
||
510 | sec->size = uncompressed_size; |
||
511 | sec->compress_status = DECOMPRESS_SECTION_SIZED; |
||
512 | |||
513 | return TRUE; |
||
514 | } |
||
515 | |||
516 | /* |
||
517 | FUNCTION |
||
518 | bfd_init_section_compress_status |
||
519 | |||
520 | SYNOPSIS |
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521 | bfd_boolean bfd_init_section_compress_status |
||
522 | (bfd *abfd, asection *section); |
||
523 | |||
524 | DESCRIPTION |
||
525 | If open for read, compress section, update section size with |
||
526 | compressed size and set compress_status to COMPRESS_SECTION_DONE. |
||
527 | |||
528 | Return @code{FALSE} if the section is not a valid compressed |
||
6324 | serge | 529 | section. Otherwise, return @code{TRUE}. |
5197 | serge | 530 | */ |
531 | |||
532 | bfd_boolean |
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6324 | serge | 533 | bfd_init_section_compress_status (bfd *abfd, sec_ptr sec) |
5197 | serge | 534 | { |
535 | bfd_size_type uncompressed_size; |
||
536 | bfd_byte *uncompressed_buffer; |
||
537 | bfd_boolean ret; |
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538 | |||
539 | /* Error if not opened for read. */ |
||
540 | if (abfd->direction != read_direction |
||
541 | || sec->size == 0 |
||
542 | || sec->rawsize != 0 |
||
543 | || sec->contents != NULL |
||
544 | || sec->compress_status != COMPRESS_SECTION_NONE) |
||
545 | { |
||
546 | bfd_set_error (bfd_error_invalid_operation); |
||
547 | return FALSE; |
||
548 | } |
||
549 | |||
550 | /* Read in the full section contents and compress it. */ |
||
551 | uncompressed_size = sec->size; |
||
552 | uncompressed_buffer = (bfd_byte *) bfd_malloc (uncompressed_size); |
||
553 | if (!bfd_get_section_contents (abfd, sec, uncompressed_buffer, |
||
554 | 0, uncompressed_size)) |
||
555 | ret = FALSE; |
||
556 | else |
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6324 | serge | 557 | { |
558 | uncompressed_size = bfd_compress_section_contents (abfd, sec, |
||
5197 | serge | 559 | uncompressed_buffer, |
560 | uncompressed_size); |
||
6324 | serge | 561 | ret = uncompressed_size != 0; |
562 | } |
||
5197 | serge | 563 | |
564 | return ret; |
||
565 | } |
||
6324 | serge | 566 | |
567 | /* |
||
568 | FUNCTION |
||
569 | bfd_compress_section |
||
570 | |||
571 | SYNOPSIS |
||
572 | bfd_boolean bfd_compress_section |
||
573 | (bfd *abfd, asection *section, bfd_byte *uncompressed_buffer); |
||
574 | |||
575 | DESCRIPTION |
||
576 | If open for write, compress section, update section size with |
||
577 | compressed size and set compress_status to COMPRESS_SECTION_DONE. |
||
578 | |||
579 | Return @code{FALSE} if compression fail. Otherwise, return |
||
580 | @code{TRUE}. |
||
581 | */ |
||
582 | |||
583 | bfd_boolean |
||
584 | bfd_compress_section (bfd *abfd, sec_ptr sec, bfd_byte *uncompressed_buffer) |
||
585 | { |
||
586 | bfd_size_type uncompressed_size = sec->size; |
||
587 | |||
588 | /* Error if not opened for write. */ |
||
589 | if (abfd->direction != write_direction |
||
590 | || uncompressed_size == 0 |
||
591 | || uncompressed_buffer == NULL |
||
592 | || sec->contents != NULL |
||
593 | || sec->compressed_size != 0 |
||
594 | || sec->compress_status != COMPRESS_SECTION_NONE) |
||
595 | { |
||
596 | bfd_set_error (bfd_error_invalid_operation); |
||
597 | return FALSE; |
||
598 | } |
||
599 | |||
600 | /* Compress it. */ |
||
601 | return bfd_compress_section_contents (abfd, sec, uncompressed_buffer, |
||
602 | uncompressed_size) != 0; |
||
603 | }>> |