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annotate gcc/lto/lto-coff.h @ 63:b7f97abdc517 gcc-4.6-20100522

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update gcc from gcc-4.5.0 to gcc-4.6
author ryoma <e075725@ie.u-ryukyu.ac.jp>
date Mon, 24 May 2010 12:47:05 +0900
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63
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
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1 /* LTO routines for COFF object files.
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2 Copyright 2009 Free Software Foundation, Inc.
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3 Contributed by Dave Korn.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it under
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8 the terms of the GNU General Public License as published by the Free
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9 Software Foundation; either version 3, or (at your option) any later
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10 version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #ifndef LTO_COFF_H
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22 #define LTO_COFF_H
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23
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24 /* Rather than implementing a libcoff to match libelf, or attempting to
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25 integrate libbfd into GCC, this file is a self-contained (and very
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26 minimal) COFF format object file reader/writer. The generated files
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27 will contain a COFF header, a number of COFF section headers, the
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28 section data itself, and a trailing string table for section names. */
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29
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30 /* Alignment of sections in a COFF object file.
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31
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32 The LTO writer uses zlib compression on the data that it streams into
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33 LTO sections in the output object file. Because these streams don't
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34 have any embedded size information, the section in the object file must
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35 be exactly sized to the data emitted; any trailing padding bytes will
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36 be interpreted as partial and/or corrupt compressed data.
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37
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38 This is easy enough to do on COFF targets (with binutils 2.20.1 or
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39 above) because we can specify 1-byte alignment for the LTO sections.
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40 They are then emitted precisely-sized and byte-packed into the object
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41 and the reader is happy when it parses them later. This is currently
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42 implemented in the x86/windows backed in i386_pe_asm_named_section()
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43 in config/i386/winnt.c by detecting the LTO section name prefix,
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44
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45 That would be sufficient, but for one thing. At the start of the LTO
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46 data is a header struct with (currently) a couple of version numbers and
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47 some type info; see struct lto_header in lto-streamer.h. If the sections
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48 are byte-packed, this header will not necessarily be correctly-aligned
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49 when it is read back into memory.
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50
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51 On x86 targets, which are currently the only LTO-COFF targets, misaligned
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52 memory accesses aren't problematic (okay, inefficient, but not worth
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53 worrying about two half-word memory reads per section in the context of
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54 everything else the compiler has to do at the time!), but RISC targets may
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55 fail on trying to access the header struct. In this case, it will be
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56 necessary to enable (preferably in a target-dependent fashion, but a few
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57 bytes of padding are hardly an important issue if it comes down to it) the
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58 COFF_ALIGNMENT macros below.
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59
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60 As currently implemented, this will emit padding to the necessary number
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61 of bytes after each LTO section. These bytes will constitute 'gaps' in
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62 the object file structure, as they won't be covered by any section header.
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63 This hasn't yet been tested, because no such RISC LTO-COFF target yet
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64 exists. If it causes problems further down the toolchain, it will be
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65 necessary to adapt the code to emit additional section headers for these
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66 padding bytes, but the odds are that it will "just work".
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67
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68 */
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69
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70 #if 0
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71 #define COFF_ALIGNMENT (4)
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72 #define COFF_ALIGNMENTM1 (COFF_ALIGNMENT - 1)
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73 #define COFF_ALIGN(x) (((x) + COFF_ALIGNMENTM1) & ~COFF_ALIGNMENTM1)
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74 #else
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75 #define COFF_ALIGNMENT (1)
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76 #define COFF_ALIGN(x) (x)
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77 #endif
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78
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79 /* COFF header machine codes. */
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80
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81 #define IMAGE_FILE_MACHINE_I386 (0x014c)
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82 #define IMAGE_FILE_MACHINE_AMD64 (0x8664)
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83
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84 /* Known header magics for validation, as an array initialiser. */
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85
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86 #define COFF_KNOWN_MACHINES \
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87 { IMAGE_FILE_MACHINE_I386, \
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88 IMAGE_FILE_MACHINE_AMD64/*, ... add more here when working. */ }
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89
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90 /* COFF object file header, section and symbol flags and types. These are
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91 currently specific to PE-COFF, which is the only LTO-COFF format at the
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92 time of writing. Maintainers adding support for new COFF formats will
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93 need to make these into target macros of some kind. */
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94
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95 /* COFF header characteristics. */
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96
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97 #define IMAGE_FILE_EXECUTABLE_IMAGE (1 << 1)
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98 #define IMAGE_FILE_32BIT_MACHINE (1 << 8)
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99 #define IMAGE_FILE_SYSTEM (1 << 12)
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100 #define IMAGE_FILE_DLL (1 << 13)
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101
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102 /* Desired characteristics (for validation). */
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103
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104 #define COFF_CHARACTERISTICS \
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105 (IMAGE_FILE_32BIT_MACHINE)
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106
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107 /* Unwanted characteristics (for validation). */
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108
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109 #define COFF_NOT_CHARACTERISTICS \
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110 (IMAGE_FILE_EXECUTABLE_IMAGE | IMAGE_FILE_SYSTEM | IMAGE_FILE_DLL)
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111
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112 /* Section flags. LTO emits byte-aligned read-only loadable data sections. */
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113
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114 #define IMAGE_SCN_CNT_INITIALIZED_DATA (1 << 6)
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115 #define IMAGE_SCN_CNT_UNINITIALIZED_DATA (1 << 7)
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116 #define IMAGE_SCN_ALIGN_1BYTES (0x1 << 20)
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117 #define IMAGE_SCN_MEM_DISCARDABLE (1 << 25)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
118 #define IMAGE_SCN_MEM_SHARED (1 << 28)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
119 #define IMAGE_SCN_MEM_READ (1 << 30)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
120
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
121 #define COFF_SECTION_CHARACTERISTICS \
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
122 (IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_ALIGN_1BYTES | \
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
123 IMAGE_SCN_MEM_DISCARDABLE | IMAGE_SCN_MEM_SHARED | IMAGE_SCN_MEM_READ)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
124
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
125 /* Symbol-related constants. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
126
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
127 #define IMAGE_SYM_DEBUG (-2)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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128 #define IMAGE_SYM_TYPE_NULL (0)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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129 #define IMAGE_SYM_DTYPE_NULL (0)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
130 #define IMAGE_SYM_CLASS_STATIC (3)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
131 #define IMAGE_SYM_CLASS_FILE (103)
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diff changeset
132
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
133 #define IMAGE_SYM_TYPE \
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
134 ((IMAGE_SYM_DTYPE_NULL << 4) | IMAGE_SYM_TYPE_NULL)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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135
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
136 /* Size of a COFF symbol in bytes. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
137
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
138 #define COFF_SYMBOL_SIZE (18)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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139
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
140 /* On-disk file structures. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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141
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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142 struct Coff_header
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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143 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
144 unsigned char Machine[2];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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145 unsigned char NumberOfSections[2];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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146 unsigned char TimeDateStamp[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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147 unsigned char PointerToSymbolTable[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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148 unsigned char NumberOfSymbols[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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149 unsigned char SizeOfOptionalHeader[2];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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150 unsigned char Characteristics[2];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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151 };
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
152 typedef struct Coff_header Coff_header;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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153
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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154 struct Coff_section
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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155 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
156 unsigned char Name[8];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
157 unsigned char VirtualSize[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
158 unsigned char VirtualAddress[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
159 unsigned char SizeOfRawData[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
160 unsigned char PointerToRawData[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
161 unsigned char PointerToRelocations[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
162 unsigned char PointerToLinenumbers[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
163 unsigned char NumberOfRelocations[2];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
164 unsigned char NumberOfLinenumbers[2];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
165 unsigned char Characteristics[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
166 };
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
167 typedef struct Coff_section Coff_section;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
168
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
169 struct Coff_symbol
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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170 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
171 unsigned char Name[8];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
172 unsigned char Value[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
173 unsigned char SectionNumber[2];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
174 unsigned char Type[2];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
175 unsigned char StorageClass[1];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
176 unsigned char NumberOfAuxSymbols[1];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
177 };
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
178 typedef struct Coff_symbol Coff_symbol;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
179
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
180 struct Coff_aux_sym_file
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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181 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
182 unsigned char FileName[18];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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183 };
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
184 typedef struct Coff_aux_sym_file Coff_aux_sym_file;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
185
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
186 struct Coff_aux_sym_section
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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187 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
188 unsigned char Length[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
189 unsigned char NumberOfRelocations[2];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
190 unsigned char NumberOfLineNumbers[2];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
191 unsigned char Checksum[4];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
192 unsigned char Number[2];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
193 unsigned char Selection[1];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
194 unsigned char Unused[3];
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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195 };
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
196 typedef struct Coff_aux_sym_section Coff_aux_sym_section;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
197
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
198 /* Accessor macros for the above structures. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
199
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
200 #define COFF_GET(struc,memb) \
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
201 ((COFFENDIAN ? get_be : get_le) (&(struc)->memb[0], sizeof ((struc)->memb)))
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
202
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
203 #define COFF_PUT(struc,memb,val) \
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
204 ((COFFENDIAN ? put_be : put_le) (&(struc)->memb[0], sizeof ((struc)->memb), val))
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
205
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
206 #define COFF_PUT_NDXSZ(struc,memb,val,ndx,sz) \
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
207 ((COFFENDIAN ? put_be : put_le) (&(struc)->memb[ndx], sz, val))
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
208
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
209 /* In-memory file structures. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
210
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
211 /* Forward declared structs. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
212
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
213 struct lto_coff_data;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
214 struct lto_coff_section;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
215 struct lto_coff_file;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
216
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
217 /* Section data in output files is made of these. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
218
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
219 struct lto_coff_data
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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220 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
221 /* Pointer to data block. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
222 void *d_buf;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
223
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
224 /* Size of data block. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
225 ssize_t d_size;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
226
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
227 /* Next data block for this section. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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228 struct lto_coff_data *next;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
229 };
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
230 typedef struct lto_coff_data lto_coff_data;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
231
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
232 /* This struct tracks the data for a section. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
233
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
234 struct lto_coff_section
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
235 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
236 /* Singly-linked list of section's data blocks. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
237 lto_coff_data *data_chain;
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diff changeset
238
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
239 /* Offset in string table of name. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
240 size_t strtab_offs;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff changeset
241
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
242 /* Section type: 0 = real, 1 = dummy. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
243 size_t type;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
244
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
245 /* Section name. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
246 const char *name;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
247
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
248 #if COFF_ALIGNMENT > 1
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
249 /* Number of trailing padding bytes needed. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
250 ssize_t pad_needed;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
251 #endif
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
252
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
253 /* Raw section header data. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
254 Coff_section coffsec;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
255
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
256 /* Next section for this file. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
257 struct lto_coff_section *next;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
258 };
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
259 typedef struct lto_coff_section lto_coff_section;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
260
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
261 /* A COFF file. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
262
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
263 struct lto_coff_file
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
264 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
265 /* The base information. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
266 lto_file base;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
267
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
268 /* Common file members: */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
269
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
270 /* The system file descriptor for the file. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
271 int fd;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
272
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
273 /* The file's overall header. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
274 Coff_header coffhdr;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
275
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
276 /* All sections in a singly-linked list. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
277 lto_coff_section *section_chain;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
278
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
279 /* Readable file members: */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
280
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
281 /* File total size. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
282 off_t file_size;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
283
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
284 /* String table file offset, relative to base.offset. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
285 off_t strtab_offs;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
286
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
287 /* Writable file members: */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
288
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
289 /* The currently active section. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
290 lto_coff_section *scn;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
291
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
292 /* The output stream for section header names. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
293 struct lto_output_stream *shstrtab_stream;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
294
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
295 /* Linked list of data which must be freed *after* the file has been
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
296 closed. This is an annoying limitation of libelf. Which has been
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
297 faithfully reproduced here. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
298 struct lto_char_ptr_base *data;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
299 };
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
300 typedef struct lto_coff_file lto_coff_file;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
301
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
302 /* Data hunk iterator. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
303
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
304 #define COFF_FOR_ALL_DATA(sec,var) \
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
305 for (var = sec->data_chain; var; var = var->next)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
306
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
307 /* Section list iterator. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
308
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
309 #define COFF_FOR_ALL_SECTIONS(file,var) \
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
310 for (var = file->section_chain; var; var = var->next)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
311
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
312 /* Very simple endian-ness layer. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
313
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
314 #ifndef COFFENDIAN
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
315 #define COFFENDIAN (BYTES_BIG_ENDIAN)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
316 #endif
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
317
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
318 static inline unsigned int
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
319 get_2_le (const unsigned char *ptr)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
320 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
321 return ptr[0] | (ptr[1] << 8);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
322 }
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
323
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
324 static inline unsigned int
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
325 get_4_le (const unsigned char *ptr)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
326 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
327 return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
328 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
329
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
330 static inline unsigned int
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
331 get_2_be (const unsigned char *ptr)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
332 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
333 return ptr[1] | (ptr[0] << 8);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
334 }
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
335
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
336 static inline unsigned int
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
337 get_4_be (const unsigned char *ptr)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
338 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
339 return ptr[3] | (ptr[2] << 8) | (ptr[1] << 16) | (ptr[0] << 24);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
340 }
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
341
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
342 static inline unsigned int
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
343 get_be (const unsigned char *ptr, size_t size)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
344 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
345 gcc_assert (size == 4 || size == 2);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
346 return (size == 2) ? get_2_be (ptr) : get_4_be (ptr);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
347 }
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
348
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
349 static inline unsigned int
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
350 get_le (const unsigned char *ptr, size_t size)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
351 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
352 gcc_assert (size == 4 || size == 2);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
353 return (size == 2) ? get_2_le (ptr) : get_4_le (ptr);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
354 }
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
355
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
356 static inline void
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
357 put_2_le (unsigned char *ptr, unsigned int data)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
358 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
359 ptr[0] = data & 0xff;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
360 ptr[1] = (data >> 8) & 0xff;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
361 }
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
362
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
363 static inline void
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
364 put_4_le (unsigned char *ptr, unsigned int data)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
365 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
366 ptr[0] = data & 0xff;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
367 ptr[1] = (data >> 8) & 0xff;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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368 ptr[2] = (data >> 16) & 0xff;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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369 ptr[3] = (data >> 24) & 0xff;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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370 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
371
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
372 static inline void
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
373 put_2_be (unsigned char *ptr, unsigned int data)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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374 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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375 ptr[1] = data & 0xff;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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376 ptr[0] = (data >> 8) & 0xff;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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377 }
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
378
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
379 static inline void
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
380 put_4_be (unsigned char *ptr, unsigned int data)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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381 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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382 ptr[3] = data & 0xff;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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383 ptr[2] = (data >> 8) & 0xff;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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384 ptr[1] = (data >> 16) & 0xff;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
385 ptr[0] = (data >> 24) & 0xff;
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
386 }
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
387
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
388 static inline void
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
389 put_le (unsigned char *ptr, size_t size, unsigned int data)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
390 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
391 gcc_assert (size == 4 || size == 2);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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392 (void) (size == 2 ? put_2_le : put_4_le) (ptr, data);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
393 }
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
394
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
395 static inline void
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
396 put_be (unsigned char *ptr, size_t size, unsigned int data)
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
397 {
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
398 gcc_assert (size == 4 || size == 2);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
399 (void) (size == 2 ? put_2_be : put_4_be) (ptr, data);
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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400 }
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
401
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
402 /* We use this for putting the string table size. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
403
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
404 #define COFF_PUT4(ptr, data) \
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
405 ((COFFENDIAN ? put_4_be : put_4_le) (ptr, data))
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
406
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
407
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff changeset
408 #endif /* LTO_COFF_H */