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5197 | serge | 1 | /* Object file "section" support for the BFD library. |
6324 | serge | 2 | Copyright (C) 1990-2015 Free Software Foundation, Inc. |
5197 | serge | 3 | Written by Cygnus Support. |
4 | |||
5 | This file is part of BFD, the Binary File Descriptor library. |
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6 | |||
7 | This program is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU General Public License as published by |
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9 | the Free Software Foundation; either version 3 of the License, or |
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10 | (at your option) any later version. |
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11 | |||
12 | This program is distributed in the hope that it will be useful, |
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | GNU General Public License for more details. |
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16 | |||
17 | You should have received a copy of the GNU General Public License |
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18 | along with this program; if not, write to the Free Software |
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19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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20 | MA 02110-1301, USA. */ |
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21 | |||
22 | /* |
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23 | SECTION |
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24 | Sections |
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25 | |||
26 | The raw data contained within a BFD is maintained through the |
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27 | section abstraction. A single BFD may have any number of |
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28 | sections. It keeps hold of them by pointing to the first; |
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29 | each one points to the next in the list. |
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30 | |||
31 | Sections are supported in BFD in < |
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32 | |||
33 | @menu |
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34 | @* Section Input:: |
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35 | @* Section Output:: |
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36 | @* typedef asection:: |
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37 | @* section prototypes:: |
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38 | @end menu |
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39 | |||
40 | INODE |
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41 | Section Input, Section Output, Sections, Sections |
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42 | SUBSECTION |
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43 | Section input |
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44 | |||
45 | When a BFD is opened for reading, the section structures are |
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46 | created and attached to the BFD. |
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47 | |||
48 | Each section has a name which describes the section in the |
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49 | outside world---for example, < |
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50 | three sections, called <<.text>>, <<.data>> and <<.bss>>. |
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51 | |||
52 | Names need not be unique; for example a COFF file may have several |
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53 | sections named <<.data>>. |
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54 | |||
55 | Sometimes a BFD will contain more than the ``natural'' number of |
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56 | sections. A back end may attach other sections containing |
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57 | constructor data, or an application may add a section (using |
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58 | < |
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59 | BFD. For example, the linker creates an extra section |
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60 | < |
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61 | common storage. |
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62 | |||
63 | The raw data is not necessarily read in when |
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64 | the section descriptor is created. Some targets may leave the |
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65 | data in place until a < |
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66 | made. Other back ends may read in all the data at once. For |
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67 | example, an S-record file has to be read once to determine the |
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68 | size of the data. An IEEE-695 file doesn't contain raw data in |
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69 | sections, but data and relocation expressions intermixed, so |
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70 | the data area has to be parsed to get out the data and |
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71 | relocations. |
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72 | |||
73 | INODE |
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74 | Section Output, typedef asection, Section Input, Sections |
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75 | |||
76 | SUBSECTION |
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77 | Section output |
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78 | |||
79 | To write a new object style BFD, the various sections to be |
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80 | written have to be created. They are attached to the BFD in |
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81 | the same way as input sections; data is written to the |
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82 | sections using < |
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83 | |||
84 | Any program that creates or combines sections (e.g., the assembler |
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85 | and linker) must use the < |
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86 | < |
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87 | section must be written. (If the section is being created from |
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88 | scratch, < |
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89 | itself and < |
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90 | |||
91 | The data to be written comes from input sections attached |
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92 | (via < |
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93 | the output sections. The output section structure can be |
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94 | considered a filter for the input section: the output section |
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95 | determines the vma of the output data and the name, but the |
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96 | input section determines the offset into the output section of |
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97 | the data to be written. |
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98 | |||
99 | E.g., to create a section "O", starting at 0x100, 0x123 long, |
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100 | containing two subsections, "A" at offset 0x0 (i.e., at vma |
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101 | 0x100) and "B" at offset 0x20 (i.e., at vma 0x120) the < |
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102 | structures would look like: |
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103 | |||
104 | | section name "A" |
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105 | | output_offset 0x00 |
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106 | | size 0x20 |
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107 | | output_section -----------> section name "O" |
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108 | | | vma 0x100 |
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109 | | section name "B" | size 0x123 |
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110 | | output_offset 0x20 | |
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111 | | size 0x103 | |
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112 | | output_section --------| |
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113 | |||
114 | SUBSECTION |
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115 | Link orders |
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116 | |||
117 | The data within a section is stored in a @dfn{link_order}. |
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118 | These are much like the fixups in < |
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119 | abstraction allows a section to grow and shrink within itself. |
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120 | |||
121 | A link_order knows how big it is, and which is the next |
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122 | link_order and where the raw data for it is; it also points to |
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123 | a list of relocations which apply to it. |
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124 | |||
125 | The link_order is used by the linker to perform relaxing on |
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126 | final code. The compiler creates code which is as big as |
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127 | necessary to make it work without relaxing, and the user can |
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128 | select whether to relax. Sometimes relaxing takes a lot of |
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129 | time. The linker runs around the relocations to see if any |
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130 | are attached to data which can be shrunk, if so it does it on |
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131 | a link_order by link_order basis. |
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132 | |||
133 | */ |
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134 | |||
135 | #include "sysdep.h" |
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136 | #include "bfd.h" |
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137 | #include "libbfd.h" |
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138 | #include "bfdlink.h" |
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139 | |||
140 | /* |
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141 | DOCDD |
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142 | INODE |
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143 | typedef asection, section prototypes, Section Output, Sections |
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144 | SUBSECTION |
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145 | typedef asection |
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146 | |||
147 | Here is the section structure: |
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148 | |||
149 | CODE_FRAGMENT |
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150 | . |
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151 | .typedef struct bfd_section |
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152 | .{ |
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153 | . {* The name of the section; the name isn't a copy, the pointer is |
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154 | . the same as that passed to bfd_make_section. *} |
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155 | . const char *name; |
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156 | . |
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157 | . {* A unique sequence number. *} |
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6324 | serge | 158 | . unsigned int id; |
5197 | serge | 159 | . |
160 | . {* Which section in the bfd; 0..n-1 as sections are created in a bfd. *} |
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6324 | serge | 161 | . unsigned int index; |
5197 | serge | 162 | . |
163 | . {* The next section in the list belonging to the BFD, or NULL. *} |
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164 | . struct bfd_section *next; |
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165 | . |
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166 | . {* The previous section in the list belonging to the BFD, or NULL. *} |
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167 | . struct bfd_section *prev; |
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168 | . |
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169 | . {* The field flags contains attributes of the section. Some |
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170 | . flags are read in from the object file, and some are |
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171 | . synthesized from other information. *} |
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172 | . flagword flags; |
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173 | . |
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174 | .#define SEC_NO_FLAGS 0x000 |
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175 | . |
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176 | . {* Tells the OS to allocate space for this section when loading. |
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177 | . This is clear for a section containing debug information only. *} |
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178 | .#define SEC_ALLOC 0x001 |
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179 | . |
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180 | . {* Tells the OS to load the section from the file when loading. |
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181 | . This is clear for a .bss section. *} |
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182 | .#define SEC_LOAD 0x002 |
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183 | . |
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184 | . {* The section contains data still to be relocated, so there is |
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185 | . some relocation information too. *} |
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186 | .#define SEC_RELOC 0x004 |
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187 | . |
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188 | . {* A signal to the OS that the section contains read only data. *} |
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189 | .#define SEC_READONLY 0x008 |
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190 | . |
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191 | . {* The section contains code only. *} |
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192 | .#define SEC_CODE 0x010 |
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193 | . |
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194 | . {* The section contains data only. *} |
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195 | .#define SEC_DATA 0x020 |
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196 | . |
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197 | . {* The section will reside in ROM. *} |
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198 | .#define SEC_ROM 0x040 |
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199 | . |
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200 | . {* The section contains constructor information. This section |
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201 | . type is used by the linker to create lists of constructors and |
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202 | . destructors used by < |
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203 | . which should be used in a constructor list, it creates a new |
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204 | . section for the type of name (e.g., <<__CTOR_LIST__>>), attaches |
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205 | . the symbol to it, and builds a relocation. To build the lists |
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206 | . of constructors, all the linker has to do is catenate all the |
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207 | . sections called <<__CTOR_LIST__>> and relocate the data |
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208 | . contained within - exactly the operations it would peform on |
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209 | . standard data. *} |
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210 | .#define SEC_CONSTRUCTOR 0x080 |
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211 | . |
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212 | . {* The section has contents - a data section could be |
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213 | . < |
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214 | . < |
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215 | .#define SEC_HAS_CONTENTS 0x100 |
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216 | . |
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217 | . {* An instruction to the linker to not output the section |
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218 | . even if it has information which would normally be written. *} |
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219 | .#define SEC_NEVER_LOAD 0x200 |
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220 | . |
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221 | . {* The section contains thread local data. *} |
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222 | .#define SEC_THREAD_LOCAL 0x400 |
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223 | . |
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224 | . {* The section has GOT references. This flag is only for the |
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225 | . linker, and is currently only used by the elf32-hppa back end. |
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226 | . It will be set if global offset table references were detected |
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227 | . in this section, which indicate to the linker that the section |
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228 | . contains PIC code, and must be handled specially when doing a |
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229 | . static link. *} |
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230 | .#define SEC_HAS_GOT_REF 0x800 |
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231 | . |
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232 | . {* The section contains common symbols (symbols may be defined |
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233 | . multiple times, the value of a symbol is the amount of |
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234 | . space it requires, and the largest symbol value is the one |
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235 | . used). Most targets have exactly one of these (which we |
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236 | . translate to bfd_com_section_ptr), but ECOFF has two. *} |
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237 | .#define SEC_IS_COMMON 0x1000 |
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238 | . |
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239 | . {* The section contains only debugging information. For |
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240 | . example, this is set for ELF .debug and .stab sections. |
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241 | . strip tests this flag to see if a section can be |
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242 | . discarded. *} |
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243 | .#define SEC_DEBUGGING 0x2000 |
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244 | . |
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245 | . {* The contents of this section are held in memory pointed to |
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246 | . by the contents field. This is checked by bfd_get_section_contents, |
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247 | . and the data is retrieved from memory if appropriate. *} |
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248 | .#define SEC_IN_MEMORY 0x4000 |
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249 | . |
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250 | . {* The contents of this section are to be excluded by the |
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251 | . linker for executable and shared objects unless those |
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252 | . objects are to be further relocated. *} |
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253 | .#define SEC_EXCLUDE 0x8000 |
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254 | . |
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255 | . {* The contents of this section are to be sorted based on the sum of |
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256 | . the symbol and addend values specified by the associated relocation |
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257 | . entries. Entries without associated relocation entries will be |
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258 | . appended to the end of the section in an unspecified order. *} |
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259 | .#define SEC_SORT_ENTRIES 0x10000 |
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260 | . |
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261 | . {* When linking, duplicate sections of the same name should be |
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262 | . discarded, rather than being combined into a single section as |
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263 | . is usually done. This is similar to how common symbols are |
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264 | . handled. See SEC_LINK_DUPLICATES below. *} |
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265 | .#define SEC_LINK_ONCE 0x20000 |
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266 | . |
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267 | . {* If SEC_LINK_ONCE is set, this bitfield describes how the linker |
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268 | . should handle duplicate sections. *} |
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269 | .#define SEC_LINK_DUPLICATES 0xc0000 |
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270 | . |
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271 | . {* This value for SEC_LINK_DUPLICATES means that duplicate |
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272 | . sections with the same name should simply be discarded. *} |
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273 | .#define SEC_LINK_DUPLICATES_DISCARD 0x0 |
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274 | . |
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275 | . {* This value for SEC_LINK_DUPLICATES means that the linker |
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276 | . should warn if there are any duplicate sections, although |
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277 | . it should still only link one copy. *} |
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278 | .#define SEC_LINK_DUPLICATES_ONE_ONLY 0x40000 |
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279 | . |
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280 | . {* This value for SEC_LINK_DUPLICATES means that the linker |
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281 | . should warn if any duplicate sections are a different size. *} |
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282 | .#define SEC_LINK_DUPLICATES_SAME_SIZE 0x80000 |
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283 | . |
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284 | . {* This value for SEC_LINK_DUPLICATES means that the linker |
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285 | . should warn if any duplicate sections contain different |
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286 | . contents. *} |
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287 | .#define SEC_LINK_DUPLICATES_SAME_CONTENTS \ |
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288 | . (SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE) |
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289 | . |
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290 | . {* This section was created by the linker as part of dynamic |
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291 | . relocation or other arcane processing. It is skipped when |
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292 | . going through the first-pass output, trusting that someone |
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293 | . else up the line will take care of it later. *} |
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294 | .#define SEC_LINKER_CREATED 0x100000 |
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295 | . |
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296 | . {* This section should not be subject to garbage collection. |
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297 | . Also set to inform the linker that this section should not be |
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298 | . listed in the link map as discarded. *} |
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299 | .#define SEC_KEEP 0x200000 |
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300 | . |
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301 | . {* This section contains "short" data, and should be placed |
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302 | . "near" the GP. *} |
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303 | .#define SEC_SMALL_DATA 0x400000 |
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304 | . |
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305 | . {* Attempt to merge identical entities in the section. |
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306 | . Entity size is given in the entsize field. *} |
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307 | .#define SEC_MERGE 0x800000 |
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308 | . |
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309 | . {* If given with SEC_MERGE, entities to merge are zero terminated |
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310 | . strings where entsize specifies character size instead of fixed |
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311 | . size entries. *} |
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312 | .#define SEC_STRINGS 0x1000000 |
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313 | . |
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314 | . {* This section contains data about section groups. *} |
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315 | .#define SEC_GROUP 0x2000000 |
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316 | . |
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317 | . {* The section is a COFF shared library section. This flag is |
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318 | . only for the linker. If this type of section appears in |
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319 | . the input file, the linker must copy it to the output file |
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320 | . without changing the vma or size. FIXME: Although this |
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321 | . was originally intended to be general, it really is COFF |
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322 | . specific (and the flag was renamed to indicate this). It |
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323 | . might be cleaner to have some more general mechanism to |
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324 | . allow the back end to control what the linker does with |
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325 | . sections. *} |
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326 | .#define SEC_COFF_SHARED_LIBRARY 0x4000000 |
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327 | . |
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328 | . {* This input section should be copied to output in reverse order |
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329 | . as an array of pointers. This is for ELF linker internal use |
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330 | . only. *} |
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331 | .#define SEC_ELF_REVERSE_COPY 0x4000000 |
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332 | . |
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333 | . {* This section contains data which may be shared with other |
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334 | . executables or shared objects. This is for COFF only. *} |
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335 | .#define SEC_COFF_SHARED 0x8000000 |
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336 | . |
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6324 | serge | 337 | . {* This section should be compressed. This is for ELF linker |
338 | . internal use only. *} |
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339 | .#define SEC_ELF_COMPRESS 0x8000000 |
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340 | . |
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5197 | serge | 341 | . {* When a section with this flag is being linked, then if the size of |
342 | . the input section is less than a page, it should not cross a page |
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343 | . boundary. If the size of the input section is one page or more, |
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344 | . it should be aligned on a page boundary. This is for TI |
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345 | . TMS320C54X only. *} |
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346 | .#define SEC_TIC54X_BLOCK 0x10000000 |
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347 | . |
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6324 | serge | 348 | . {* This section should be renamed. This is for ELF linker |
349 | . internal use only. *} |
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350 | .#define SEC_ELF_RENAME 0x10000000 |
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351 | . |
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5197 | serge | 352 | . {* Conditionally link this section; do not link if there are no |
353 | . references found to any symbol in the section. This is for TI |
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354 | . TMS320C54X only. *} |
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355 | .#define SEC_TIC54X_CLINK 0x20000000 |
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356 | . |
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6324 | serge | 357 | . {* This section contains vliw code. This is for Toshiba MeP only. *} |
358 | .#define SEC_MEP_VLIW 0x20000000 |
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359 | . |
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5197 | serge | 360 | . {* Indicate that section has the no read flag set. This happens |
361 | . when memory read flag isn't set. *} |
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362 | .#define SEC_COFF_NOREAD 0x40000000 |
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363 | . |
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364 | . {* End of section flags. *} |
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365 | . |
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366 | . {* Some internal packed boolean fields. *} |
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367 | . |
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368 | . {* See the vma field. *} |
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369 | . unsigned int user_set_vma : 1; |
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370 | . |
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371 | . {* A mark flag used by some of the linker backends. *} |
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372 | . unsigned int linker_mark : 1; |
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373 | . |
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374 | . {* Another mark flag used by some of the linker backends. Set for |
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375 | . output sections that have an input section. *} |
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376 | . unsigned int linker_has_input : 1; |
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377 | . |
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378 | . {* Mark flag used by some linker backends for garbage collection. *} |
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379 | . unsigned int gc_mark : 1; |
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380 | . |
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381 | . {* Section compression status. *} |
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382 | . unsigned int compress_status : 2; |
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383 | .#define COMPRESS_SECTION_NONE 0 |
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384 | .#define COMPRESS_SECTION_DONE 1 |
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385 | .#define DECOMPRESS_SECTION_SIZED 2 |
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386 | . |
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387 | . {* The following flags are used by the ELF linker. *} |
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388 | . |
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389 | . {* Mark sections which have been allocated to segments. *} |
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390 | . unsigned int segment_mark : 1; |
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391 | . |
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392 | . {* Type of sec_info information. *} |
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393 | . unsigned int sec_info_type:3; |
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394 | .#define SEC_INFO_TYPE_NONE 0 |
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395 | .#define SEC_INFO_TYPE_STABS 1 |
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396 | .#define SEC_INFO_TYPE_MERGE 2 |
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397 | .#define SEC_INFO_TYPE_EH_FRAME 3 |
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398 | .#define SEC_INFO_TYPE_JUST_SYMS 4 |
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6324 | serge | 399 | .#define SEC_INFO_TYPE_TARGET 5 |
400 | .#define SEC_INFO_TYPE_EH_FRAME_ENTRY 6 |
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5197 | serge | 401 | . |
402 | . {* Nonzero if this section uses RELA relocations, rather than REL. *} |
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403 | . unsigned int use_rela_p:1; |
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404 | . |
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405 | . {* Bits used by various backends. The generic code doesn't touch |
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406 | . these fields. *} |
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407 | . |
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408 | . unsigned int sec_flg0:1; |
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409 | . unsigned int sec_flg1:1; |
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410 | . unsigned int sec_flg2:1; |
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411 | . unsigned int sec_flg3:1; |
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412 | . unsigned int sec_flg4:1; |
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413 | . unsigned int sec_flg5:1; |
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414 | . |
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415 | . {* End of internal packed boolean fields. *} |
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416 | . |
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417 | . {* The virtual memory address of the section - where it will be |
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418 | . at run time. The symbols are relocated against this. The |
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419 | . user_set_vma flag is maintained by bfd; if it's not set, the |
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420 | . backend can assign addresses (for example, in < |
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421 | . the default address for <<.data>> is dependent on the specific |
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422 | . target and various flags). *} |
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423 | . bfd_vma vma; |
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424 | . |
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425 | . {* The load address of the section - where it would be in a |
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426 | . rom image; really only used for writing section header |
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427 | . information. *} |
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428 | . bfd_vma lma; |
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429 | . |
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430 | . {* The size of the section in octets, as it will be output. |
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431 | . Contains a value even if the section has no contents (e.g., the |
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432 | . size of <<.bss>>). *} |
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433 | . bfd_size_type size; |
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434 | . |
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435 | . {* For input sections, the original size on disk of the section, in |
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436 | . octets. This field should be set for any section whose size is |
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437 | . changed by linker relaxation. It is required for sections where |
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438 | . the linker relaxation scheme doesn't cache altered section and |
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439 | . reloc contents (stabs, eh_frame, SEC_MERGE, some coff relaxing |
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440 | . targets), and thus the original size needs to be kept to read the |
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441 | . section multiple times. For output sections, rawsize holds the |
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442 | . section size calculated on a previous linker relaxation pass. *} |
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443 | . bfd_size_type rawsize; |
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444 | . |
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445 | . {* The compressed size of the section in octets. *} |
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446 | . bfd_size_type compressed_size; |
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447 | . |
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448 | . {* Relaxation table. *} |
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449 | . struct relax_table *relax; |
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450 | . |
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451 | . {* Count of used relaxation table entries. *} |
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452 | . int relax_count; |
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453 | . |
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454 | . |
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455 | . {* If this section is going to be output, then this value is the |
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456 | . offset in *bytes* into the output section of the first byte in the |
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457 | . input section (byte ==> smallest addressable unit on the |
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458 | . target). In most cases, if this was going to start at the |
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459 | . 100th octet (8-bit quantity) in the output section, this value |
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460 | . would be 100. However, if the target byte size is 16 bits |
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461 | . (bfd_octets_per_byte is "2"), this value would be 50. *} |
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462 | . bfd_vma output_offset; |
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463 | . |
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464 | . {* The output section through which to map on output. *} |
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465 | . struct bfd_section *output_section; |
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466 | . |
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467 | . {* The alignment requirement of the section, as an exponent of 2 - |
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468 | . e.g., 3 aligns to 2^3 (or 8). *} |
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469 | . unsigned int alignment_power; |
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470 | . |
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471 | . {* If an input section, a pointer to a vector of relocation |
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472 | . records for the data in this section. *} |
||
473 | . struct reloc_cache_entry *relocation; |
||
474 | . |
||
475 | . {* If an output section, a pointer to a vector of pointers to |
||
476 | . relocation records for the data in this section. *} |
||
477 | . struct reloc_cache_entry **orelocation; |
||
478 | . |
||
479 | . {* The number of relocation records in one of the above. *} |
||
480 | . unsigned reloc_count; |
||
481 | . |
||
482 | . {* Information below is back end specific - and not always used |
||
483 | . or updated. *} |
||
484 | . |
||
485 | . {* File position of section data. *} |
||
486 | . file_ptr filepos; |
||
487 | . |
||
488 | . {* File position of relocation info. *} |
||
489 | . file_ptr rel_filepos; |
||
490 | . |
||
491 | . {* File position of line data. *} |
||
492 | . file_ptr line_filepos; |
||
493 | . |
||
494 | . {* Pointer to data for applications. *} |
||
495 | . void *userdata; |
||
496 | . |
||
497 | . {* If the SEC_IN_MEMORY flag is set, this points to the actual |
||
498 | . contents. *} |
||
499 | . unsigned char *contents; |
||
500 | . |
||
501 | . {* Attached line number information. *} |
||
502 | . alent *lineno; |
||
503 | . |
||
504 | . {* Number of line number records. *} |
||
505 | . unsigned int lineno_count; |
||
506 | . |
||
507 | . {* Entity size for merging purposes. *} |
||
508 | . unsigned int entsize; |
||
509 | . |
||
510 | . {* Points to the kept section if this section is a link-once section, |
||
511 | . and is discarded. *} |
||
512 | . struct bfd_section *kept_section; |
||
513 | . |
||
514 | . {* When a section is being output, this value changes as more |
||
515 | . linenumbers are written out. *} |
||
516 | . file_ptr moving_line_filepos; |
||
517 | . |
||
518 | . {* What the section number is in the target world. *} |
||
519 | . int target_index; |
||
520 | . |
||
521 | . void *used_by_bfd; |
||
522 | . |
||
523 | . {* If this is a constructor section then here is a list of the |
||
524 | . relocations created to relocate items within it. *} |
||
525 | . struct relent_chain *constructor_chain; |
||
526 | . |
||
527 | . {* The BFD which owns the section. *} |
||
528 | . bfd *owner; |
||
529 | . |
||
530 | . {* A symbol which points at this section only. *} |
||
531 | . struct bfd_symbol *symbol; |
||
532 | . struct bfd_symbol **symbol_ptr_ptr; |
||
533 | . |
||
534 | . {* Early in the link process, map_head and map_tail are used to build |
||
535 | . a list of input sections attached to an output section. Later, |
||
536 | . output sections use these fields for a list of bfd_link_order |
||
537 | . structs. *} |
||
538 | . union { |
||
539 | . struct bfd_link_order *link_order; |
||
540 | . struct bfd_section *s; |
||
541 | . } map_head, map_tail; |
||
542 | .} asection; |
||
543 | . |
||
544 | .{* Relax table contains information about instructions which can |
||
545 | . be removed by relaxation -- replacing a long address with a |
||
546 | . short address. *} |
||
547 | .struct relax_table { |
||
548 | . {* Address where bytes may be deleted. *} |
||
549 | . bfd_vma addr; |
||
550 | . |
||
551 | . {* Number of bytes to be deleted. *} |
||
552 | . int size; |
||
553 | .}; |
||
554 | . |
||
6324 | serge | 555 | .{* Note: the following are provided as inline functions rather than macros |
556 | . because not all callers use the return value. A macro implementation |
||
557 | . would use a comma expression, eg: "((ptr)->foo = val, TRUE)" and some |
||
558 | . compilers will complain about comma expressions that have no effect. *} |
||
559 | .static inline bfd_boolean |
||
560 | .bfd_set_section_userdata (bfd * abfd ATTRIBUTE_UNUSED, asection * ptr, void * val) |
||
561 | .{ |
||
562 | . ptr->userdata = val; |
||
563 | . return TRUE; |
||
564 | .} |
||
565 | . |
||
566 | .static inline bfd_boolean |
||
567 | .bfd_set_section_vma (bfd * abfd ATTRIBUTE_UNUSED, asection * ptr, bfd_vma val) |
||
568 | .{ |
||
569 | . ptr->vma = ptr->lma = val; |
||
570 | . ptr->user_set_vma = TRUE; |
||
571 | . return TRUE; |
||
572 | .} |
||
573 | . |
||
574 | .static inline bfd_boolean |
||
575 | .bfd_set_section_alignment (bfd * abfd ATTRIBUTE_UNUSED, asection * ptr, unsigned int val) |
||
576 | .{ |
||
577 | . ptr->alignment_power = val; |
||
578 | . return TRUE; |
||
579 | .} |
||
580 | . |
||
5197 | serge | 581 | .{* These sections are global, and are managed by BFD. The application |
582 | . and target back end are not permitted to change the values in |
||
583 | . these sections. *} |
||
584 | .extern asection _bfd_std_section[4]; |
||
585 | . |
||
586 | .#define BFD_ABS_SECTION_NAME "*ABS*" |
||
587 | .#define BFD_UND_SECTION_NAME "*UND*" |
||
588 | .#define BFD_COM_SECTION_NAME "*COM*" |
||
589 | .#define BFD_IND_SECTION_NAME "*IND*" |
||
590 | . |
||
591 | .{* Pointer to the common section. *} |
||
592 | .#define bfd_com_section_ptr (&_bfd_std_section[0]) |
||
593 | .{* Pointer to the undefined section. *} |
||
594 | .#define bfd_und_section_ptr (&_bfd_std_section[1]) |
||
595 | .{* Pointer to the absolute section. *} |
||
596 | .#define bfd_abs_section_ptr (&_bfd_std_section[2]) |
||
597 | .{* Pointer to the indirect section. *} |
||
598 | .#define bfd_ind_section_ptr (&_bfd_std_section[3]) |
||
599 | . |
||
600 | .#define bfd_is_und_section(sec) ((sec) == bfd_und_section_ptr) |
||
601 | .#define bfd_is_abs_section(sec) ((sec) == bfd_abs_section_ptr) |
||
602 | .#define bfd_is_ind_section(sec) ((sec) == bfd_ind_section_ptr) |
||
603 | . |
||
604 | .#define bfd_is_const_section(SEC) \ |
||
605 | . ( ((SEC) == bfd_abs_section_ptr) \ |
||
606 | . || ((SEC) == bfd_und_section_ptr) \ |
||
607 | . || ((SEC) == bfd_com_section_ptr) \ |
||
608 | . || ((SEC) == bfd_ind_section_ptr)) |
||
609 | . |
||
610 | .{* Macros to handle insertion and deletion of a bfd's sections. These |
||
611 | . only handle the list pointers, ie. do not adjust section_count, |
||
612 | . target_index etc. *} |
||
613 | .#define bfd_section_list_remove(ABFD, S) \ |
||
614 | . do \ |
||
615 | . { \ |
||
616 | . asection *_s = S; \ |
||
617 | . asection *_next = _s->next; \ |
||
618 | . asection *_prev = _s->prev; \ |
||
619 | . if (_prev) \ |
||
620 | . _prev->next = _next; \ |
||
621 | . else \ |
||
622 | . (ABFD)->sections = _next; \ |
||
623 | . if (_next) \ |
||
624 | . _next->prev = _prev; \ |
||
625 | . else \ |
||
626 | . (ABFD)->section_last = _prev; \ |
||
627 | . } \ |
||
628 | . while (0) |
||
629 | .#define bfd_section_list_append(ABFD, S) \ |
||
630 | . do \ |
||
631 | . { \ |
||
632 | . asection *_s = S; \ |
||
633 | . bfd *_abfd = ABFD; \ |
||
634 | . _s->next = NULL; \ |
||
635 | . if (_abfd->section_last) \ |
||
636 | . { \ |
||
637 | . _s->prev = _abfd->section_last; \ |
||
638 | . _abfd->section_last->next = _s; \ |
||
639 | . } \ |
||
640 | . else \ |
||
641 | . { \ |
||
642 | . _s->prev = NULL; \ |
||
643 | . _abfd->sections = _s; \ |
||
644 | . } \ |
||
645 | . _abfd->section_last = _s; \ |
||
646 | . } \ |
||
647 | . while (0) |
||
648 | .#define bfd_section_list_prepend(ABFD, S) \ |
||
649 | . do \ |
||
650 | . { \ |
||
651 | . asection *_s = S; \ |
||
652 | . bfd *_abfd = ABFD; \ |
||
653 | . _s->prev = NULL; \ |
||
654 | . if (_abfd->sections) \ |
||
655 | . { \ |
||
656 | . _s->next = _abfd->sections; \ |
||
657 | . _abfd->sections->prev = _s; \ |
||
658 | . } \ |
||
659 | . else \ |
||
660 | . { \ |
||
661 | . _s->next = NULL; \ |
||
662 | . _abfd->section_last = _s; \ |
||
663 | . } \ |
||
664 | . _abfd->sections = _s; \ |
||
665 | . } \ |
||
666 | . while (0) |
||
667 | .#define bfd_section_list_insert_after(ABFD, A, S) \ |
||
668 | . do \ |
||
669 | . { \ |
||
670 | . asection *_a = A; \ |
||
671 | . asection *_s = S; \ |
||
672 | . asection *_next = _a->next; \ |
||
673 | . _s->next = _next; \ |
||
674 | . _s->prev = _a; \ |
||
675 | . _a->next = _s; \ |
||
676 | . if (_next) \ |
||
677 | . _next->prev = _s; \ |
||
678 | . else \ |
||
679 | . (ABFD)->section_last = _s; \ |
||
680 | . } \ |
||
681 | . while (0) |
||
682 | .#define bfd_section_list_insert_before(ABFD, B, S) \ |
||
683 | . do \ |
||
684 | . { \ |
||
685 | . asection *_b = B; \ |
||
686 | . asection *_s = S; \ |
||
687 | . asection *_prev = _b->prev; \ |
||
688 | . _s->prev = _prev; \ |
||
689 | . _s->next = _b; \ |
||
690 | . _b->prev = _s; \ |
||
691 | . if (_prev) \ |
||
692 | . _prev->next = _s; \ |
||
693 | . else \ |
||
694 | . (ABFD)->sections = _s; \ |
||
695 | . } \ |
||
696 | . while (0) |
||
697 | .#define bfd_section_removed_from_list(ABFD, S) \ |
||
698 | . ((S)->next == NULL ? (ABFD)->section_last != (S) : (S)->next->prev != (S)) |
||
699 | . |
||
700 | .#define BFD_FAKE_SECTION(SEC, FLAGS, SYM, NAME, IDX) \ |
||
701 | . {* name, id, index, next, prev, flags, user_set_vma, *} \ |
||
702 | . { NAME, IDX, 0, NULL, NULL, FLAGS, 0, \ |
||
703 | . \ |
||
704 | . {* linker_mark, linker_has_input, gc_mark, decompress_status, *} \ |
||
705 | . 0, 0, 1, 0, \ |
||
706 | . \ |
||
707 | . {* segment_mark, sec_info_type, use_rela_p, *} \ |
||
708 | . 0, 0, 0, \ |
||
709 | . \ |
||
710 | . {* sec_flg0, sec_flg1, sec_flg2, sec_flg3, sec_flg4, sec_flg5, *} \ |
||
711 | . 0, 0, 0, 0, 0, 0, \ |
||
712 | . \ |
||
713 | . {* vma, lma, size, rawsize, compressed_size, relax, relax_count, *} \ |
||
714 | . 0, 0, 0, 0, 0, 0, 0, \ |
||
715 | . \ |
||
716 | . {* output_offset, output_section, alignment_power, *} \ |
||
717 | . 0, &SEC, 0, \ |
||
718 | . \ |
||
719 | . {* relocation, orelocation, reloc_count, filepos, rel_filepos, *} \ |
||
720 | . NULL, NULL, 0, 0, 0, \ |
||
721 | . \ |
||
722 | . {* line_filepos, userdata, contents, lineno, lineno_count, *} \ |
||
723 | . 0, NULL, NULL, NULL, 0, \ |
||
724 | . \ |
||
725 | . {* entsize, kept_section, moving_line_filepos, *} \ |
||
726 | . 0, NULL, 0, \ |
||
727 | . \ |
||
728 | . {* target_index, used_by_bfd, constructor_chain, owner, *} \ |
||
729 | . 0, NULL, NULL, NULL, \ |
||
730 | . \ |
||
731 | . {* symbol, symbol_ptr_ptr, *} \ |
||
732 | . (struct bfd_symbol *) SYM, &SEC.symbol, \ |
||
733 | . \ |
||
734 | . {* map_head, map_tail *} \ |
||
735 | . { NULL }, { NULL } \ |
||
736 | . } |
||
737 | . |
||
738 | */ |
||
739 | |||
740 | /* We use a macro to initialize the static asymbol structures because |
||
741 | traditional C does not permit us to initialize a union member while |
||
742 | gcc warns if we don't initialize it. */ |
||
743 | /* the_bfd, name, value, attr, section [, udata] */ |
||
744 | #ifdef __STDC__ |
||
745 | #define GLOBAL_SYM_INIT(NAME, SECTION) \ |
||
746 | { 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 }} |
||
747 | #else |
||
748 | #define GLOBAL_SYM_INIT(NAME, SECTION) \ |
||
749 | { 0, NAME, 0, BSF_SECTION_SYM, SECTION } |
||
750 | #endif |
||
751 | |||
752 | /* These symbols are global, not specific to any BFD. Therefore, anything |
||
753 | that tries to change them is broken, and should be repaired. */ |
||
754 | |||
755 | static const asymbol global_syms[] = |
||
756 | { |
||
757 | GLOBAL_SYM_INIT (BFD_COM_SECTION_NAME, bfd_com_section_ptr), |
||
758 | GLOBAL_SYM_INIT (BFD_UND_SECTION_NAME, bfd_und_section_ptr), |
||
759 | GLOBAL_SYM_INIT (BFD_ABS_SECTION_NAME, bfd_abs_section_ptr), |
||
760 | GLOBAL_SYM_INIT (BFD_IND_SECTION_NAME, bfd_ind_section_ptr) |
||
761 | }; |
||
762 | |||
763 | #define STD_SECTION(NAME, IDX, FLAGS) \ |
||
764 | BFD_FAKE_SECTION(_bfd_std_section[IDX], FLAGS, &global_syms[IDX], NAME, IDX) |
||
765 | |||
766 | asection _bfd_std_section[] = { |
||
767 | STD_SECTION (BFD_COM_SECTION_NAME, 0, SEC_IS_COMMON), |
||
768 | STD_SECTION (BFD_UND_SECTION_NAME, 1, 0), |
||
769 | STD_SECTION (BFD_ABS_SECTION_NAME, 2, 0), |
||
770 | STD_SECTION (BFD_IND_SECTION_NAME, 3, 0) |
||
771 | }; |
||
772 | #undef STD_SECTION |
||
773 | |||
774 | /* Initialize an entry in the section hash table. */ |
||
775 | |||
776 | struct bfd_hash_entry * |
||
777 | bfd_section_hash_newfunc (struct bfd_hash_entry *entry, |
||
778 | struct bfd_hash_table *table, |
||
779 | const char *string) |
||
780 | { |
||
781 | /* Allocate the structure if it has not already been allocated by a |
||
782 | subclass. */ |
||
783 | if (entry == NULL) |
||
784 | { |
||
785 | entry = (struct bfd_hash_entry *) |
||
786 | bfd_hash_allocate (table, sizeof (struct section_hash_entry)); |
||
787 | if (entry == NULL) |
||
788 | return entry; |
||
789 | } |
||
790 | |||
791 | /* Call the allocation method of the superclass. */ |
||
792 | entry = bfd_hash_newfunc (entry, table, string); |
||
793 | if (entry != NULL) |
||
794 | memset (&((struct section_hash_entry *) entry)->section, 0, |
||
795 | sizeof (asection)); |
||
796 | |||
797 | return entry; |
||
798 | } |
||
799 | |||
800 | #define section_hash_lookup(table, string, create, copy) \ |
||
801 | ((struct section_hash_entry *) \ |
||
802 | bfd_hash_lookup ((table), (string), (create), (copy))) |
||
803 | |||
804 | /* Create a symbol whose only job is to point to this section. This |
||
805 | is useful for things like relocs which are relative to the base |
||
806 | of a section. */ |
||
807 | |||
808 | bfd_boolean |
||
809 | _bfd_generic_new_section_hook (bfd *abfd, asection *newsect) |
||
810 | { |
||
811 | newsect->symbol = bfd_make_empty_symbol (abfd); |
||
812 | if (newsect->symbol == NULL) |
||
813 | return FALSE; |
||
814 | |||
815 | newsect->symbol->name = newsect->name; |
||
816 | newsect->symbol->value = 0; |
||
817 | newsect->symbol->section = newsect; |
||
818 | newsect->symbol->flags = BSF_SECTION_SYM; |
||
819 | |||
820 | newsect->symbol_ptr_ptr = &newsect->symbol; |
||
821 | return TRUE; |
||
822 | } |
||
823 | |||
6324 | serge | 824 | static unsigned int section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */ |
825 | |||
5197 | serge | 826 | /* Initializes a new section. NEWSECT->NAME is already set. */ |
827 | |||
828 | static asection * |
||
829 | bfd_section_init (bfd *abfd, asection *newsect) |
||
830 | { |
||
831 | newsect->id = section_id; |
||
832 | newsect->index = abfd->section_count; |
||
833 | newsect->owner = abfd; |
||
834 | |||
835 | if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect))) |
||
836 | return NULL; |
||
837 | |||
838 | section_id++; |
||
839 | abfd->section_count++; |
||
840 | bfd_section_list_append (abfd, newsect); |
||
841 | return newsect; |
||
842 | } |
||
843 | |||
844 | /* |
||
845 | DOCDD |
||
846 | INODE |
||
847 | section prototypes, , typedef asection, Sections |
||
848 | SUBSECTION |
||
849 | Section prototypes |
||
850 | |||
851 | These are the functions exported by the section handling part of BFD. |
||
852 | */ |
||
853 | |||
854 | /* |
||
855 | FUNCTION |
||
856 | bfd_section_list_clear |
||
857 | |||
858 | SYNOPSIS |
||
859 | void bfd_section_list_clear (bfd *); |
||
860 | |||
861 | DESCRIPTION |
||
862 | Clears the section list, and also resets the section count and |
||
863 | hash table entries. |
||
864 | */ |
||
865 | |||
866 | void |
||
867 | bfd_section_list_clear (bfd *abfd) |
||
868 | { |
||
869 | abfd->sections = NULL; |
||
870 | abfd->section_last = NULL; |
||
871 | abfd->section_count = 0; |
||
872 | memset (abfd->section_htab.table, 0, |
||
873 | abfd->section_htab.size * sizeof (struct bfd_hash_entry *)); |
||
874 | abfd->section_htab.count = 0; |
||
875 | } |
||
876 | |||
877 | /* |
||
878 | FUNCTION |
||
879 | bfd_get_section_by_name |
||
880 | |||
881 | SYNOPSIS |
||
882 | asection *bfd_get_section_by_name (bfd *abfd, const char *name); |
||
883 | |||
884 | DESCRIPTION |
||
885 | Return the most recently created section attached to @var{abfd} |
||
886 | named @var{name}. Return NULL if no such section exists. |
||
887 | */ |
||
888 | |||
889 | asection * |
||
890 | bfd_get_section_by_name (bfd *abfd, const char *name) |
||
891 | { |
||
892 | struct section_hash_entry *sh; |
||
893 | |||
894 | sh = section_hash_lookup (&abfd->section_htab, name, FALSE, FALSE); |
||
895 | if (sh != NULL) |
||
896 | return &sh->section; |
||
897 | |||
898 | return NULL; |
||
899 | } |
||
900 | |||
901 | /* |
||
902 | FUNCTION |
||
903 | bfd_get_next_section_by_name |
||
904 | |||
905 | SYNOPSIS |
||
6324 | serge | 906 | asection *bfd_get_next_section_by_name (bfd *ibfd, asection *sec); |
5197 | serge | 907 | |
908 | DESCRIPTION |
||
909 | Given @var{sec} is a section returned by @code{bfd_get_section_by_name}, |
||
910 | return the next most recently created section attached to the same |
||
6324 | serge | 911 | BFD with the same name, or if no such section exists in the same BFD and |
912 | IBFD is non-NULL, the next section with the same name in any input |
||
913 | BFD following IBFD. Return NULL on finding no section. |
||
5197 | serge | 914 | */ |
915 | |||
916 | asection * |
||
6324 | serge | 917 | bfd_get_next_section_by_name (bfd *ibfd, asection *sec) |
5197 | serge | 918 | { |
919 | struct section_hash_entry *sh; |
||
920 | const char *name; |
||
921 | unsigned long hash; |
||
922 | |||
923 | sh = ((struct section_hash_entry *) |
||
924 | ((char *) sec - offsetof (struct section_hash_entry, section))); |
||
925 | |||
926 | hash = sh->root.hash; |
||
927 | name = sec->name; |
||
928 | for (sh = (struct section_hash_entry *) sh->root.next; |
||
929 | sh != NULL; |
||
930 | sh = (struct section_hash_entry *) sh->root.next) |
||
931 | if (sh->root.hash == hash |
||
932 | && strcmp (sh->root.string, name) == 0) |
||
933 | return &sh->section; |
||
934 | |||
6324 | serge | 935 | if (ibfd != NULL) |
936 | { |
||
937 | while ((ibfd = ibfd->link.next) != NULL) |
||
938 | { |
||
939 | asection *s = bfd_get_section_by_name (ibfd, name); |
||
940 | if (s != NULL) |
||
941 | return s; |
||
942 | } |
||
943 | } |
||
944 | |||
5197 | serge | 945 | return NULL; |
946 | } |
||
947 | |||
948 | /* |
||
949 | FUNCTION |
||
950 | bfd_get_linker_section |
||
951 | |||
952 | SYNOPSIS |
||
953 | asection *bfd_get_linker_section (bfd *abfd, const char *name); |
||
954 | |||
955 | DESCRIPTION |
||
956 | Return the linker created section attached to @var{abfd} |
||
957 | named @var{name}. Return NULL if no such section exists. |
||
958 | */ |
||
959 | |||
960 | asection * |
||
961 | bfd_get_linker_section (bfd *abfd, const char *name) |
||
962 | { |
||
963 | asection *sec = bfd_get_section_by_name (abfd, name); |
||
964 | |||
965 | while (sec != NULL && (sec->flags & SEC_LINKER_CREATED) == 0) |
||
6324 | serge | 966 | sec = bfd_get_next_section_by_name (NULL, sec); |
5197 | serge | 967 | return sec; |
968 | } |
||
969 | |||
970 | /* |
||
971 | FUNCTION |
||
972 | bfd_get_section_by_name_if |
||
973 | |||
974 | SYNOPSIS |
||
975 | asection *bfd_get_section_by_name_if |
||
976 | (bfd *abfd, |
||
977 | const char *name, |
||
978 | bfd_boolean (*func) (bfd *abfd, asection *sect, void *obj), |
||
979 | void *obj); |
||
980 | |||
981 | DESCRIPTION |
||
982 | Call the provided function @var{func} for each section |
||
983 | attached to the BFD @var{abfd} whose name matches @var{name}, |
||
984 | passing @var{obj} as an argument. The function will be called |
||
985 | as if by |
||
986 | |||
987 | | func (abfd, the_section, obj); |
||
988 | |||
989 | It returns the first section for which @var{func} returns true, |
||
990 | otherwise < |
||
991 | |||
992 | */ |
||
993 | |||
994 | asection * |
||
995 | bfd_get_section_by_name_if (bfd *abfd, const char *name, |
||
996 | bfd_boolean (*operation) (bfd *, |
||
997 | asection *, |
||
998 | void *), |
||
999 | void *user_storage) |
||
1000 | { |
||
1001 | struct section_hash_entry *sh; |
||
1002 | unsigned long hash; |
||
1003 | |||
1004 | sh = section_hash_lookup (&abfd->section_htab, name, FALSE, FALSE); |
||
1005 | if (sh == NULL) |
||
1006 | return NULL; |
||
1007 | |||
1008 | hash = sh->root.hash; |
||
6324 | serge | 1009 | for (; sh != NULL; sh = (struct section_hash_entry *) sh->root.next) |
1010 | if (sh->root.hash == hash |
||
1011 | && strcmp (sh->root.string, name) == 0 |
||
1012 | && (*operation) (abfd, &sh->section, user_storage)) |
||
5197 | serge | 1013 | return &sh->section; |
1014 | |||
1015 | return NULL; |
||
1016 | } |
||
1017 | |||
1018 | /* |
||
1019 | FUNCTION |
||
1020 | bfd_get_unique_section_name |
||
1021 | |||
1022 | SYNOPSIS |
||
1023 | char *bfd_get_unique_section_name |
||
1024 | (bfd *abfd, const char *templat, int *count); |
||
1025 | |||
1026 | DESCRIPTION |
||
1027 | Invent a section name that is unique in @var{abfd} by tacking |
||
1028 | a dot and a digit suffix onto the original @var{templat}. If |
||
1029 | @var{count} is non-NULL, then it specifies the first number |
||
1030 | tried as a suffix to generate a unique name. The value |
||
1031 | pointed to by @var{count} will be incremented in this case. |
||
1032 | */ |
||
1033 | |||
1034 | char * |
||
1035 | bfd_get_unique_section_name (bfd *abfd, const char *templat, int *count) |
||
1036 | { |
||
1037 | int num; |
||
1038 | unsigned int len; |
||
1039 | char *sname; |
||
1040 | |||
1041 | len = strlen (templat); |
||
1042 | sname = (char *) bfd_malloc (len + 8); |
||
1043 | if (sname == NULL) |
||
1044 | return NULL; |
||
1045 | memcpy (sname, templat, len); |
||
1046 | num = 1; |
||
1047 | if (count != NULL) |
||
1048 | num = *count; |
||
1049 | |||
1050 | do |
||
1051 | { |
||
1052 | /* If we have a million sections, something is badly wrong. */ |
||
1053 | if (num > 999999) |
||
1054 | abort (); |
||
1055 | sprintf (sname + len, ".%d", num++); |
||
1056 | } |
||
1057 | while (section_hash_lookup (&abfd->section_htab, sname, FALSE, FALSE)); |
||
1058 | |||
1059 | if (count != NULL) |
||
1060 | *count = num; |
||
1061 | return sname; |
||
1062 | } |
||
1063 | |||
1064 | /* |
||
1065 | FUNCTION |
||
1066 | bfd_make_section_old_way |
||
1067 | |||
1068 | SYNOPSIS |
||
1069 | asection *bfd_make_section_old_way (bfd *abfd, const char *name); |
||
1070 | |||
1071 | DESCRIPTION |
||
1072 | Create a new empty section called @var{name} |
||
1073 | and attach it to the end of the chain of sections for the |
||
1074 | BFD @var{abfd}. An attempt to create a section with a name which |
||
1075 | is already in use returns its pointer without changing the |
||
1076 | section chain. |
||
1077 | |||
1078 | It has the funny name since this is the way it used to be |
||
1079 | before it was rewritten.... |
||
1080 | |||
1081 | Possible errors are: |
||
1082 | o < |
||
1083 | If output has already started for this BFD. |
||
1084 | o < |
||
1085 | If memory allocation fails. |
||
1086 | |||
1087 | */ |
||
1088 | |||
1089 | asection * |
||
1090 | bfd_make_section_old_way (bfd *abfd, const char *name) |
||
1091 | { |
||
1092 | asection *newsect; |
||
1093 | |||
1094 | if (abfd->output_has_begun) |
||
1095 | { |
||
1096 | bfd_set_error (bfd_error_invalid_operation); |
||
1097 | return NULL; |
||
1098 | } |
||
1099 | |||
1100 | if (strcmp (name, BFD_ABS_SECTION_NAME) == 0) |
||
1101 | newsect = bfd_abs_section_ptr; |
||
1102 | else if (strcmp (name, BFD_COM_SECTION_NAME) == 0) |
||
1103 | newsect = bfd_com_section_ptr; |
||
1104 | else if (strcmp (name, BFD_UND_SECTION_NAME) == 0) |
||
1105 | newsect = bfd_und_section_ptr; |
||
1106 | else if (strcmp (name, BFD_IND_SECTION_NAME) == 0) |
||
1107 | newsect = bfd_ind_section_ptr; |
||
1108 | else |
||
1109 | { |
||
1110 | struct section_hash_entry *sh; |
||
1111 | |||
1112 | sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE); |
||
1113 | if (sh == NULL) |
||
1114 | return NULL; |
||
1115 | |||
1116 | newsect = &sh->section; |
||
1117 | if (newsect->name != NULL) |
||
1118 | { |
||
1119 | /* Section already exists. */ |
||
1120 | return newsect; |
||
1121 | } |
||
1122 | |||
1123 | newsect->name = name; |
||
1124 | return bfd_section_init (abfd, newsect); |
||
1125 | } |
||
1126 | |||
1127 | /* Call new_section_hook when "creating" the standard abs, com, und |
||
1128 | and ind sections to tack on format specific section data. |
||
1129 | Also, create a proper section symbol. */ |
||
1130 | if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect))) |
||
1131 | return NULL; |
||
1132 | return newsect; |
||
1133 | } |
||
1134 | |||
1135 | /* |
||
1136 | FUNCTION |
||
1137 | bfd_make_section_anyway_with_flags |
||
1138 | |||
1139 | SYNOPSIS |
||
1140 | asection *bfd_make_section_anyway_with_flags |
||
1141 | (bfd *abfd, const char *name, flagword flags); |
||
1142 | |||
1143 | DESCRIPTION |
||
1144 | Create a new empty section called @var{name} and attach it to the end of |
||
1145 | the chain of sections for @var{abfd}. Create a new section even if there |
||
1146 | is already a section with that name. Also set the attributes of the |
||
1147 | new section to the value @var{flags}. |
||
1148 | |||
1149 | Return < |
||
1150 | o < |
||
1151 | o < |
||
1152 | */ |
||
1153 | |||
1154 | sec_ptr |
||
1155 | bfd_make_section_anyway_with_flags (bfd *abfd, const char *name, |
||
1156 | flagword flags) |
||
1157 | { |
||
1158 | struct section_hash_entry *sh; |
||
1159 | asection *newsect; |
||
1160 | |||
1161 | if (abfd->output_has_begun) |
||
1162 | { |
||
1163 | bfd_set_error (bfd_error_invalid_operation); |
||
1164 | return NULL; |
||
1165 | } |
||
1166 | |||
1167 | sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE); |
||
1168 | if (sh == NULL) |
||
1169 | return NULL; |
||
1170 | |||
1171 | newsect = &sh->section; |
||
1172 | if (newsect->name != NULL) |
||
1173 | { |
||
1174 | /* We are making a section of the same name. Put it in the |
||
1175 | section hash table. Even though we can't find it directly by a |
||
1176 | hash lookup, we'll be able to find the section by traversing |
||
1177 | sh->root.next quicker than looking at all the bfd sections. */ |
||
1178 | struct section_hash_entry *new_sh; |
||
1179 | new_sh = (struct section_hash_entry *) |
||
1180 | bfd_section_hash_newfunc (NULL, &abfd->section_htab, name); |
||
1181 | if (new_sh == NULL) |
||
1182 | return NULL; |
||
1183 | |||
1184 | new_sh->root = sh->root; |
||
1185 | sh->root.next = &new_sh->root; |
||
1186 | newsect = &new_sh->section; |
||
1187 | } |
||
1188 | |||
1189 | newsect->flags = flags; |
||
1190 | newsect->name = name; |
||
1191 | return bfd_section_init (abfd, newsect); |
||
1192 | } |
||
1193 | |||
1194 | /* |
||
1195 | FUNCTION |
||
1196 | bfd_make_section_anyway |
||
1197 | |||
1198 | SYNOPSIS |
||
1199 | asection *bfd_make_section_anyway (bfd *abfd, const char *name); |
||
1200 | |||
1201 | DESCRIPTION |
||
1202 | Create a new empty section called @var{name} and attach it to the end of |
||
1203 | the chain of sections for @var{abfd}. Create a new section even if there |
||
1204 | is already a section with that name. |
||
1205 | |||
1206 | Return < |
||
1207 | o < |
||
1208 | o < |
||
1209 | */ |
||
1210 | |||
1211 | sec_ptr |
||
1212 | bfd_make_section_anyway (bfd *abfd, const char *name) |
||
1213 | { |
||
1214 | return bfd_make_section_anyway_with_flags (abfd, name, 0); |
||
1215 | } |
||
1216 | |||
1217 | /* |
||
1218 | FUNCTION |
||
1219 | bfd_make_section_with_flags |
||
1220 | |||
1221 | SYNOPSIS |
||
1222 | asection *bfd_make_section_with_flags |
||
1223 | (bfd *, const char *name, flagword flags); |
||
1224 | |||
1225 | DESCRIPTION |
||
1226 | Like < |
||
1227 | bfd_set_error ()) without changing the section chain if there is already a |
||
1228 | section named @var{name}. Also set the attributes of the new section to |
||
1229 | the value @var{flags}. If there is an error, return < |
||
1230 | < |
||
1231 | */ |
||
1232 | |||
1233 | asection * |
||
1234 | bfd_make_section_with_flags (bfd *abfd, const char *name, |
||
1235 | flagword flags) |
||
1236 | { |
||
1237 | struct section_hash_entry *sh; |
||
1238 | asection *newsect; |
||
1239 | |||
1240 | if (abfd->output_has_begun) |
||
1241 | { |
||
1242 | bfd_set_error (bfd_error_invalid_operation); |
||
1243 | return NULL; |
||
1244 | } |
||
1245 | |||
1246 | if (strcmp (name, BFD_ABS_SECTION_NAME) == 0 |
||
1247 | || strcmp (name, BFD_COM_SECTION_NAME) == 0 |
||
1248 | || strcmp (name, BFD_UND_SECTION_NAME) == 0 |
||
1249 | || strcmp (name, BFD_IND_SECTION_NAME) == 0) |
||
1250 | return NULL; |
||
1251 | |||
1252 | sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE); |
||
1253 | if (sh == NULL) |
||
1254 | return NULL; |
||
1255 | |||
1256 | newsect = &sh->section; |
||
1257 | if (newsect->name != NULL) |
||
1258 | { |
||
1259 | /* Section already exists. */ |
||
1260 | return NULL; |
||
1261 | } |
||
1262 | |||
1263 | newsect->name = name; |
||
1264 | newsect->flags = flags; |
||
1265 | return bfd_section_init (abfd, newsect); |
||
1266 | } |
||
1267 | |||
1268 | /* |
||
1269 | FUNCTION |
||
1270 | bfd_make_section |
||
1271 | |||
1272 | SYNOPSIS |
||
1273 | asection *bfd_make_section (bfd *, const char *name); |
||
1274 | |||
1275 | DESCRIPTION |
||
1276 | Like < |
||
1277 | bfd_set_error ()) without changing the section chain if there is already a |
||
1278 | section named @var{name}. If there is an error, return < |
||
1279 | < |
||
1280 | */ |
||
1281 | |||
1282 | asection * |
||
1283 | bfd_make_section (bfd *abfd, const char *name) |
||
1284 | { |
||
1285 | return bfd_make_section_with_flags (abfd, name, 0); |
||
1286 | } |
||
1287 | |||
1288 | /* |
||
1289 | FUNCTION |
||
6324 | serge | 1290 | bfd_get_next_section_id |
1291 | |||
1292 | SYNOPSIS |
||
1293 | int bfd_get_next_section_id (void); |
||
1294 | |||
1295 | DESCRIPTION |
||
1296 | Returns the id that the next section created will have. |
||
1297 | */ |
||
1298 | |||
1299 | int |
||
1300 | bfd_get_next_section_id (void) |
||
1301 | { |
||
1302 | return section_id; |
||
1303 | } |
||
1304 | |||
1305 | /* |
||
1306 | FUNCTION |
||
5197 | serge | 1307 | bfd_set_section_flags |
1308 | |||
1309 | SYNOPSIS |
||
1310 | bfd_boolean bfd_set_section_flags |
||
1311 | (bfd *abfd, asection *sec, flagword flags); |
||
1312 | |||
1313 | DESCRIPTION |
||
1314 | Set the attributes of the section @var{sec} in the BFD |
||
1315 | @var{abfd} to the value @var{flags}. Return < |
||
1316 | < |
||
1317 | |||
1318 | o < |
||
1319 | The section cannot have one or more of the attributes |
||
1320 | requested. For example, a .bss section in < |
||
1321 | have the < |
||
1322 | |||
1323 | */ |
||
1324 | |||
1325 | bfd_boolean |
||
1326 | bfd_set_section_flags (bfd *abfd ATTRIBUTE_UNUSED, |
||
1327 | sec_ptr section, |
||
1328 | flagword flags) |
||
1329 | { |
||
1330 | section->flags = flags; |
||
1331 | return TRUE; |
||
1332 | } |
||
1333 | |||
1334 | /* |
||
1335 | FUNCTION |
||
1336 | bfd_rename_section |
||
1337 | |||
1338 | SYNOPSIS |
||
1339 | void bfd_rename_section |
||
1340 | (bfd *abfd, asection *sec, const char *newname); |
||
1341 | |||
1342 | DESCRIPTION |
||
1343 | Rename section @var{sec} in @var{abfd} to @var{newname}. |
||
1344 | */ |
||
1345 | |||
1346 | void |
||
1347 | bfd_rename_section (bfd *abfd, sec_ptr sec, const char *newname) |
||
1348 | { |
||
1349 | struct section_hash_entry *sh; |
||
1350 | |||
1351 | sh = (struct section_hash_entry *) |
||
1352 | ((char *) sec - offsetof (struct section_hash_entry, section)); |
||
1353 | sh->section.name = newname; |
||
1354 | bfd_hash_rename (&abfd->section_htab, newname, &sh->root); |
||
1355 | } |
||
1356 | |||
1357 | /* |
||
1358 | FUNCTION |
||
1359 | bfd_map_over_sections |
||
1360 | |||
1361 | SYNOPSIS |
||
1362 | void bfd_map_over_sections |
||
1363 | (bfd *abfd, |
||
1364 | void (*func) (bfd *abfd, asection *sect, void *obj), |
||
1365 | void *obj); |
||
1366 | |||
1367 | DESCRIPTION |
||
1368 | Call the provided function @var{func} for each section |
||
1369 | attached to the BFD @var{abfd}, passing @var{obj} as an |
||
1370 | argument. The function will be called as if by |
||
1371 | |||
1372 | | func (abfd, the_section, obj); |
||
1373 | |||
1374 | This is the preferred method for iterating over sections; an |
||
1375 | alternative would be to use a loop: |
||
1376 | |||
1377 | | asection *p; |
||
1378 | | for (p = abfd->sections; p != NULL; p = p->next) |
||
1379 | | func (abfd, p, ...) |
||
1380 | |||
1381 | */ |
||
1382 | |||
1383 | void |
||
1384 | bfd_map_over_sections (bfd *abfd, |
||
1385 | void (*operation) (bfd *, asection *, void *), |
||
1386 | void *user_storage) |
||
1387 | { |
||
1388 | asection *sect; |
||
1389 | unsigned int i = 0; |
||
1390 | |||
1391 | for (sect = abfd->sections; sect != NULL; i++, sect = sect->next) |
||
1392 | (*operation) (abfd, sect, user_storage); |
||
1393 | |||
1394 | if (i != abfd->section_count) /* Debugging */ |
||
1395 | abort (); |
||
1396 | } |
||
1397 | |||
1398 | /* |
||
1399 | FUNCTION |
||
1400 | bfd_sections_find_if |
||
1401 | |||
1402 | SYNOPSIS |
||
1403 | asection *bfd_sections_find_if |
||
1404 | (bfd *abfd, |
||
1405 | bfd_boolean (*operation) (bfd *abfd, asection *sect, void *obj), |
||
1406 | void *obj); |
||
1407 | |||
1408 | DESCRIPTION |
||
1409 | Call the provided function @var{operation} for each section |
||
1410 | attached to the BFD @var{abfd}, passing @var{obj} as an |
||
1411 | argument. The function will be called as if by |
||
1412 | |||
1413 | | operation (abfd, the_section, obj); |
||
1414 | |||
1415 | It returns the first section for which @var{operation} returns true. |
||
1416 | |||
1417 | */ |
||
1418 | |||
1419 | asection * |
||
1420 | bfd_sections_find_if (bfd *abfd, |
||
1421 | bfd_boolean (*operation) (bfd *, asection *, void *), |
||
1422 | void *user_storage) |
||
1423 | { |
||
1424 | asection *sect; |
||
1425 | |||
1426 | for (sect = abfd->sections; sect != NULL; sect = sect->next) |
||
1427 | if ((*operation) (abfd, sect, user_storage)) |
||
1428 | break; |
||
1429 | |||
1430 | return sect; |
||
1431 | } |
||
1432 | |||
1433 | /* |
||
1434 | FUNCTION |
||
1435 | bfd_set_section_size |
||
1436 | |||
1437 | SYNOPSIS |
||
1438 | bfd_boolean bfd_set_section_size |
||
1439 | (bfd *abfd, asection *sec, bfd_size_type val); |
||
1440 | |||
1441 | DESCRIPTION |
||
1442 | Set @var{sec} to the size @var{val}. If the operation is |
||
1443 | ok, then < |
||
1444 | |||
1445 | Possible error returns: |
||
1446 | o < |
||
1447 | Writing has started to the BFD, so setting the size is invalid. |
||
1448 | |||
1449 | */ |
||
1450 | |||
1451 | bfd_boolean |
||
1452 | bfd_set_section_size (bfd *abfd, sec_ptr ptr, bfd_size_type val) |
||
1453 | { |
||
1454 | /* Once you've started writing to any section you cannot create or change |
||
1455 | the size of any others. */ |
||
1456 | |||
1457 | if (abfd->output_has_begun) |
||
1458 | { |
||
1459 | bfd_set_error (bfd_error_invalid_operation); |
||
1460 | return FALSE; |
||
1461 | } |
||
1462 | |||
1463 | ptr->size = val; |
||
1464 | return TRUE; |
||
1465 | } |
||
1466 | |||
1467 | /* |
||
1468 | FUNCTION |
||
1469 | bfd_set_section_contents |
||
1470 | |||
1471 | SYNOPSIS |
||
1472 | bfd_boolean bfd_set_section_contents |
||
1473 | (bfd *abfd, asection *section, const void *data, |
||
1474 | file_ptr offset, bfd_size_type count); |
||
1475 | |||
1476 | DESCRIPTION |
||
1477 | Sets the contents of the section @var{section} in BFD |
||
1478 | @var{abfd} to the data starting in memory at @var{data}. The |
||
1479 | data is written to the output section starting at offset |
||
1480 | @var{offset} for @var{count} octets. |
||
1481 | |||
1482 | Normally < |
||
1483 | returns are: |
||
1484 | o < |
||
1485 | The output section does not have the < |
||
1486 | attribute, so nothing can be written to it. |
||
1487 | o and some more too |
||
1488 | |||
1489 | This routine is front end to the back end function |
||
1490 | <<_bfd_set_section_contents>>. |
||
1491 | |||
1492 | */ |
||
1493 | |||
1494 | bfd_boolean |
||
1495 | bfd_set_section_contents (bfd *abfd, |
||
1496 | sec_ptr section, |
||
1497 | const void *location, |
||
1498 | file_ptr offset, |
||
1499 | bfd_size_type count) |
||
1500 | { |
||
1501 | bfd_size_type sz; |
||
1502 | |||
1503 | if (!(bfd_get_section_flags (abfd, section) & SEC_HAS_CONTENTS)) |
||
1504 | { |
||
1505 | bfd_set_error (bfd_error_no_contents); |
||
1506 | return FALSE; |
||
1507 | } |
||
1508 | |||
1509 | sz = section->size; |
||
1510 | if ((bfd_size_type) offset > sz |
||
1511 | || count > sz |
||
1512 | || offset + count > sz |
||
1513 | || count != (size_t) count) |
||
1514 | { |
||
1515 | bfd_set_error (bfd_error_bad_value); |
||
1516 | return FALSE; |
||
1517 | } |
||
1518 | |||
1519 | if (!bfd_write_p (abfd)) |
||
1520 | { |
||
1521 | bfd_set_error (bfd_error_invalid_operation); |
||
1522 | return FALSE; |
||
1523 | } |
||
1524 | |||
1525 | /* Record a copy of the data in memory if desired. */ |
||
1526 | if (section->contents |
||
1527 | && location != section->contents + offset) |
||
1528 | memcpy (section->contents + offset, location, (size_t) count); |
||
1529 | |||
1530 | if (BFD_SEND (abfd, _bfd_set_section_contents, |
||
1531 | (abfd, section, location, offset, count))) |
||
1532 | { |
||
1533 | abfd->output_has_begun = TRUE; |
||
1534 | return TRUE; |
||
1535 | } |
||
1536 | |||
1537 | return FALSE; |
||
1538 | } |
||
1539 | |||
1540 | /* |
||
1541 | FUNCTION |
||
1542 | bfd_get_section_contents |
||
1543 | |||
1544 | SYNOPSIS |
||
1545 | bfd_boolean bfd_get_section_contents |
||
1546 | (bfd *abfd, asection *section, void *location, file_ptr offset, |
||
1547 | bfd_size_type count); |
||
1548 | |||
1549 | DESCRIPTION |
||
1550 | Read data from @var{section} in BFD @var{abfd} |
||
1551 | into memory starting at @var{location}. The data is read at an |
||
1552 | offset of @var{offset} from the start of the input section, |
||
1553 | and is read for @var{count} bytes. |
||
1554 | |||
1555 | If the contents of a constructor with the < |
||
1556 | flag set are requested or if the section does not have the |
||
1557 | < |
||
1558 | with zeroes. If no errors occur, < |
||
1559 | < |
||
1560 | |||
1561 | */ |
||
1562 | bfd_boolean |
||
1563 | bfd_get_section_contents (bfd *abfd, |
||
1564 | sec_ptr section, |
||
1565 | void *location, |
||
1566 | file_ptr offset, |
||
1567 | bfd_size_type count) |
||
1568 | { |
||
1569 | bfd_size_type sz; |
||
1570 | |||
1571 | if (section->flags & SEC_CONSTRUCTOR) |
||
1572 | { |
||
1573 | memset (location, 0, (size_t) count); |
||
1574 | return TRUE; |
||
1575 | } |
||
1576 | |||
1577 | if (abfd->direction != write_direction && section->rawsize != 0) |
||
1578 | sz = section->rawsize; |
||
1579 | else |
||
1580 | sz = section->size; |
||
1581 | if ((bfd_size_type) offset > sz |
||
1582 | || count > sz |
||
1583 | || offset + count > sz |
||
1584 | || count != (size_t) count) |
||
1585 | { |
||
1586 | bfd_set_error (bfd_error_bad_value); |
||
1587 | return FALSE; |
||
1588 | } |
||
1589 | |||
1590 | if (count == 0) |
||
1591 | /* Don't bother. */ |
||
1592 | return TRUE; |
||
1593 | |||
1594 | if ((section->flags & SEC_HAS_CONTENTS) == 0) |
||
1595 | { |
||
1596 | memset (location, 0, (size_t) count); |
||
1597 | return TRUE; |
||
1598 | } |
||
1599 | |||
1600 | if ((section->flags & SEC_IN_MEMORY) != 0) |
||
1601 | { |
||
1602 | if (section->contents == NULL) |
||
1603 | { |
||
1604 | /* This can happen because of errors earlier on in the linking process. |
||
1605 | We do not want to seg-fault here, so clear the flag and return an |
||
1606 | error code. */ |
||
1607 | section->flags &= ~ SEC_IN_MEMORY; |
||
1608 | bfd_set_error (bfd_error_invalid_operation); |
||
1609 | return FALSE; |
||
1610 | } |
||
1611 | |||
1612 | memmove (location, section->contents + offset, (size_t) count); |
||
1613 | return TRUE; |
||
1614 | } |
||
1615 | |||
1616 | return BFD_SEND (abfd, _bfd_get_section_contents, |
||
1617 | (abfd, section, location, offset, count)); |
||
1618 | } |
||
1619 | |||
1620 | /* |
||
1621 | FUNCTION |
||
1622 | bfd_malloc_and_get_section |
||
1623 | |||
1624 | SYNOPSIS |
||
1625 | bfd_boolean bfd_malloc_and_get_section |
||
1626 | (bfd *abfd, asection *section, bfd_byte **buf); |
||
1627 | |||
1628 | DESCRIPTION |
||
1629 | Read all data from @var{section} in BFD @var{abfd} |
||
1630 | into a buffer, *@var{buf}, malloc'd by this function. |
||
1631 | */ |
||
1632 | |||
1633 | bfd_boolean |
||
1634 | bfd_malloc_and_get_section (bfd *abfd, sec_ptr sec, bfd_byte **buf) |
||
1635 | { |
||
1636 | *buf = NULL; |
||
1637 | return bfd_get_full_section_contents (abfd, sec, buf); |
||
1638 | } |
||
1639 | /* |
||
1640 | FUNCTION |
||
1641 | bfd_copy_private_section_data |
||
1642 | |||
1643 | SYNOPSIS |
||
1644 | bfd_boolean bfd_copy_private_section_data |
||
1645 | (bfd *ibfd, asection *isec, bfd *obfd, asection *osec); |
||
1646 | |||
1647 | DESCRIPTION |
||
1648 | Copy private section information from @var{isec} in the BFD |
||
1649 | @var{ibfd} to the section @var{osec} in the BFD @var{obfd}. |
||
1650 | Return < |
||
1651 | returns are: |
||
1652 | |||
1653 | o < |
||
1654 | Not enough memory exists to create private data for @var{osec}. |
||
1655 | |||
1656 | .#define bfd_copy_private_section_data(ibfd, isection, obfd, osection) \ |
||
1657 | . BFD_SEND (obfd, _bfd_copy_private_section_data, \ |
||
1658 | . (ibfd, isection, obfd, osection)) |
||
1659 | */ |
||
1660 | |||
1661 | /* |
||
1662 | FUNCTION |
||
1663 | bfd_generic_is_group_section |
||
1664 | |||
1665 | SYNOPSIS |
||
1666 | bfd_boolean bfd_generic_is_group_section (bfd *, const asection *sec); |
||
1667 | |||
1668 | DESCRIPTION |
||
1669 | Returns TRUE if @var{sec} is a member of a group. |
||
1670 | */ |
||
1671 | |||
1672 | bfd_boolean |
||
1673 | bfd_generic_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, |
||
1674 | const asection *sec ATTRIBUTE_UNUSED) |
||
1675 | { |
||
1676 | return FALSE; |
||
1677 | } |
||
1678 | |||
1679 | /* |
||
1680 | FUNCTION |
||
1681 | bfd_generic_discard_group |
||
1682 | |||
1683 | SYNOPSIS |
||
1684 | bfd_boolean bfd_generic_discard_group (bfd *abfd, asection *group); |
||
1685 | |||
1686 | DESCRIPTION |
||
1687 | Remove all members of @var{group} from the output. |
||
1688 | */ |
||
1689 | |||
1690 | bfd_boolean |
||
1691 | bfd_generic_discard_group (bfd *abfd ATTRIBUTE_UNUSED, |
||
1692 | asection *group ATTRIBUTE_UNUSED) |
||
1693 | { |
||
1694 | return TRUE; |
||
1695 | } |