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5197 | serge | 1 | /* Support for the generic parts of COFF, for BFD. |
2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
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3 | 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
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4 | Free Software Foundation, Inc. |
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5 | Written by Cygnus Support. |
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6 | |||
7 | This file is part of BFD, the Binary File Descriptor library. |
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8 | |||
9 | This program is free software; you can redistribute it and/or modify |
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10 | it under the terms of the GNU General Public License as published by |
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11 | the Free Software Foundation; either version 3 of the License, or |
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12 | (at your option) any later version. |
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13 | |||
14 | This program is distributed in the hope that it will be useful, |
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15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | GNU General Public License for more details. |
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18 | |||
19 | You should have received a copy of the GNU General Public License |
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20 | along with this program; if not, write to the Free Software |
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21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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22 | MA 02110-1301, USA. */ |
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23 | |||
24 | /* Most of this hacked by Steve Chamberlain, sac@cygnus.com. |
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25 | Split out of coffcode.h by Ian Taylor, ian@cygnus.com. */ |
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26 | |||
27 | /* This file contains COFF code that is not dependent on any |
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28 | particular COFF target. There is only one version of this file in |
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29 | libbfd.a, so no target specific code may be put in here. Or, to |
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30 | put it another way, |
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31 | |||
32 | ********** DO NOT PUT TARGET SPECIFIC CODE IN THIS FILE ********** |
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33 | |||
34 | If you need to add some target specific behaviour, add a new hook |
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35 | function to bfd_coff_backend_data. |
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36 | |||
37 | Some of these functions are also called by the ECOFF routines. |
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38 | Those functions may not use any COFF specific information, such as |
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39 | coff_data (abfd). */ |
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40 | |||
41 | #include "sysdep.h" |
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42 | #include "bfd.h" |
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43 | #include "libbfd.h" |
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44 | #include "coff/internal.h" |
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45 | #include "libcoff.h" |
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46 | |||
47 | /* Take a section header read from a coff file (in HOST byte order), |
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48 | and make a BFD "section" out of it. This is used by ECOFF. */ |
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49 | |||
50 | static bfd_boolean |
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51 | make_a_section_from_file (bfd *abfd, |
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52 | struct internal_scnhdr *hdr, |
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53 | unsigned int target_index) |
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54 | { |
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55 | asection *return_section; |
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56 | char *name; |
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57 | bfd_boolean result = TRUE; |
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58 | flagword flags; |
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59 | |||
60 | name = NULL; |
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61 | |||
62 | /* Handle long section names as in PE. On reading, we want to |
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63 | accept long names if the format permits them at all, regardless |
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64 | of the current state of the flag that dictates if we would generate |
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65 | them in outputs; this construct checks if that is the case by |
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66 | attempting to set the flag, without changing its state; the call |
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67 | will fail for formats that do not support long names at all. */ |
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68 | if (bfd_coff_set_long_section_names (abfd, bfd_coff_long_section_names (abfd)) |
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69 | && hdr->s_name[0] == '/') |
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70 | { |
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71 | char buf[SCNNMLEN]; |
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72 | long strindex; |
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73 | char *p; |
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74 | const char *strings; |
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75 | |||
76 | /* Flag that this BFD uses long names, even though the format might |
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77 | expect them to be off by default. This won't directly affect the |
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78 | format of any output BFD created from this one, but the information |
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79 | can be used to decide what to do. */ |
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80 | bfd_coff_set_long_section_names (abfd, TRUE); |
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81 | memcpy (buf, hdr->s_name + 1, SCNNMLEN - 1); |
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82 | buf[SCNNMLEN - 1] = '\0'; |
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83 | strindex = strtol (buf, &p, 10); |
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84 | if (*p == '\0' && strindex >= 0) |
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85 | { |
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86 | strings = _bfd_coff_read_string_table (abfd); |
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87 | if (strings == NULL) |
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88 | return FALSE; |
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89 | /* FIXME: For extra safety, we should make sure that |
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90 | strindex does not run us past the end, but right now we |
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91 | don't know the length of the string table. */ |
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92 | strings += strindex; |
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93 | name = (char *) bfd_alloc (abfd, |
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94 | (bfd_size_type) strlen (strings) + 1 + 1); |
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95 | if (name == NULL) |
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96 | return FALSE; |
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97 | strcpy (name, strings); |
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98 | } |
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99 | } |
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100 | |||
101 | if (name == NULL) |
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102 | { |
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103 | /* Assorted wastage to null-terminate the name, thanks AT&T! */ |
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104 | name = (char *) bfd_alloc (abfd, |
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105 | (bfd_size_type) sizeof (hdr->s_name) + 1 + 1); |
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106 | if (name == NULL) |
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107 | return FALSE; |
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108 | strncpy (name, (char *) &hdr->s_name[0], sizeof (hdr->s_name)); |
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109 | name[sizeof (hdr->s_name)] = 0; |
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110 | } |
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111 | |||
112 | return_section = bfd_make_section_anyway (abfd, name); |
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113 | if (return_section == NULL) |
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114 | return FALSE; |
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115 | |||
116 | return_section->vma = hdr->s_vaddr; |
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117 | return_section->lma = hdr->s_paddr; |
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118 | return_section->size = hdr->s_size; |
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119 | return_section->filepos = hdr->s_scnptr; |
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120 | return_section->rel_filepos = hdr->s_relptr; |
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121 | return_section->reloc_count = hdr->s_nreloc; |
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122 | |||
123 | bfd_coff_set_alignment_hook (abfd, return_section, hdr); |
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124 | |||
125 | return_section->line_filepos = hdr->s_lnnoptr; |
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126 | |||
127 | return_section->lineno_count = hdr->s_nlnno; |
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128 | return_section->userdata = NULL; |
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129 | return_section->next = NULL; |
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130 | return_section->target_index = target_index; |
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131 | |||
132 | if (! bfd_coff_styp_to_sec_flags_hook (abfd, hdr, name, return_section, |
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133 | & flags)) |
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134 | result = FALSE; |
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135 | |||
136 | return_section->flags = flags; |
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137 | |||
138 | /* At least on i386-coff, the line number count for a shared library |
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139 | section must be ignored. */ |
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140 | if ((return_section->flags & SEC_COFF_SHARED_LIBRARY) != 0) |
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141 | return_section->lineno_count = 0; |
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142 | |||
143 | if (hdr->s_nreloc != 0) |
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144 | return_section->flags |= SEC_RELOC; |
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145 | /* FIXME: should this check 'hdr->s_size > 0'. */ |
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146 | if (hdr->s_scnptr != 0) |
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147 | return_section->flags |= SEC_HAS_CONTENTS; |
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148 | |||
149 | /* Compress/decompress DWARF debug sections with names: .debug_* and |
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150 | .zdebug_*, after the section flags is set. */ |
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151 | if ((flags & SEC_DEBUGGING) |
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152 | && ((name[1] == 'd' && name[6] == '_') |
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153 | || (name[1] == 'z' && name[7] == '_'))) |
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154 | { |
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155 | enum { nothing, compress, decompress } action = nothing; |
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156 | char *new_name = NULL; |
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157 | |||
158 | if (bfd_is_section_compressed (abfd, return_section)) |
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159 | { |
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160 | /* Compressed section. Check if we should decompress. */ |
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161 | if ((abfd->flags & BFD_DECOMPRESS)) |
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162 | action = decompress; |
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163 | } |
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164 | else if (!bfd_is_section_compressed (abfd, return_section)) |
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165 | { |
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166 | /* Normal section. Check if we should compress. */ |
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167 | if ((abfd->flags & BFD_COMPRESS) && return_section->size != 0) |
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168 | action = compress; |
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169 | } |
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170 | |||
171 | switch (action) |
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172 | { |
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173 | case nothing: |
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174 | break; |
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175 | case compress: |
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176 | if (!bfd_init_section_compress_status (abfd, return_section)) |
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177 | { |
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178 | (*_bfd_error_handler) |
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179 | (_("%B: unable to initialize compress status for section %s"), |
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180 | abfd, name); |
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181 | return FALSE; |
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182 | } |
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183 | if (name[1] != 'z') |
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184 | { |
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185 | unsigned int len = strlen (name); |
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186 | |||
187 | new_name = bfd_alloc (abfd, len + 2); |
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188 | if (new_name == NULL) |
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189 | return FALSE; |
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190 | new_name[0] = '.'; |
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191 | new_name[1] = 'z'; |
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192 | memcpy (new_name + 2, name + 1, len); |
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193 | } |
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194 | break; |
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195 | case decompress: |
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196 | if (!bfd_init_section_decompress_status (abfd, return_section)) |
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197 | { |
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198 | (*_bfd_error_handler) |
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199 | (_("%B: unable to initialize decompress status for section %s"), |
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200 | abfd, name); |
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201 | return FALSE; |
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202 | } |
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203 | if (name[1] == 'z') |
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204 | { |
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205 | unsigned int len = strlen (name); |
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206 | |||
207 | new_name = bfd_alloc (abfd, len); |
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208 | if (new_name == NULL) |
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209 | return FALSE; |
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210 | new_name[0] = '.'; |
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211 | memcpy (new_name + 1, name + 2, len - 1); |
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212 | } |
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213 | break; |
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214 | } |
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215 | if (new_name != NULL) |
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216 | bfd_rename_section (abfd, return_section, new_name); |
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217 | } |
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218 | |||
219 | return result; |
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220 | } |
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221 | |||
222 | /* Read in a COFF object and make it into a BFD. This is used by |
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223 | ECOFF as well. */ |
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224 | const bfd_target * |
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225 | coff_real_object_p (bfd *, |
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226 | unsigned, |
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227 | struct internal_filehdr *, |
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228 | struct internal_aouthdr *); |
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229 | const bfd_target * |
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230 | coff_real_object_p (bfd *abfd, |
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231 | unsigned nscns, |
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232 | struct internal_filehdr *internal_f, |
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233 | struct internal_aouthdr *internal_a) |
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234 | { |
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235 | flagword oflags = abfd->flags; |
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236 | bfd_vma ostart = bfd_get_start_address (abfd); |
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237 | void * tdata; |
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238 | void * tdata_save; |
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239 | bfd_size_type readsize; /* Length of file_info. */ |
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240 | unsigned int scnhsz; |
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241 | char *external_sections; |
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242 | |||
243 | if (!(internal_f->f_flags & F_RELFLG)) |
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244 | abfd->flags |= HAS_RELOC; |
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245 | if ((internal_f->f_flags & F_EXEC)) |
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246 | abfd->flags |= EXEC_P; |
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247 | if (!(internal_f->f_flags & F_LNNO)) |
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248 | abfd->flags |= HAS_LINENO; |
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249 | if (!(internal_f->f_flags & F_LSYMS)) |
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250 | abfd->flags |= HAS_LOCALS; |
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251 | |||
252 | /* FIXME: How can we set D_PAGED correctly? */ |
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253 | if ((internal_f->f_flags & F_EXEC) != 0) |
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254 | abfd->flags |= D_PAGED; |
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255 | |||
256 | bfd_get_symcount (abfd) = internal_f->f_nsyms; |
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257 | if (internal_f->f_nsyms) |
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258 | abfd->flags |= HAS_SYMS; |
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259 | |||
260 | if (internal_a != (struct internal_aouthdr *) NULL) |
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261 | bfd_get_start_address (abfd) = internal_a->entry; |
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262 | else |
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263 | bfd_get_start_address (abfd) = 0; |
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264 | |||
265 | /* Set up the tdata area. ECOFF uses its own routine, and overrides |
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266 | abfd->flags. */ |
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267 | tdata_save = abfd->tdata.any; |
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268 | tdata = bfd_coff_mkobject_hook (abfd, (void *) internal_f, (void *) internal_a); |
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269 | if (tdata == NULL) |
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270 | goto fail2; |
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271 | |||
272 | scnhsz = bfd_coff_scnhsz (abfd); |
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273 | readsize = (bfd_size_type) nscns * scnhsz; |
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274 | external_sections = (char *) bfd_alloc (abfd, readsize); |
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275 | if (!external_sections) |
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276 | goto fail; |
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277 | |||
278 | if (bfd_bread ((void *) external_sections, readsize, abfd) != readsize) |
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279 | goto fail; |
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280 | |||
281 | /* Set the arch/mach *before* swapping in sections; section header swapping |
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282 | may depend on arch/mach info. */ |
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283 | if (! bfd_coff_set_arch_mach_hook (abfd, (void *) internal_f)) |
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284 | goto fail; |
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285 | |||
286 | /* Now copy data as required; construct all asections etc. */ |
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287 | if (nscns != 0) |
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288 | { |
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289 | unsigned int i; |
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290 | for (i = 0; i < nscns; i++) |
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291 | { |
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292 | struct internal_scnhdr tmp; |
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293 | bfd_coff_swap_scnhdr_in (abfd, |
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294 | (void *) (external_sections + i * scnhsz), |
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295 | (void *) & tmp); |
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296 | if (! make_a_section_from_file (abfd, &tmp, i + 1)) |
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297 | goto fail; |
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298 | } |
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299 | } |
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300 | |||
301 | return abfd->xvec; |
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302 | |||
303 | fail: |
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304 | bfd_release (abfd, tdata); |
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305 | fail2: |
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306 | abfd->tdata.any = tdata_save; |
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307 | abfd->flags = oflags; |
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308 | bfd_get_start_address (abfd) = ostart; |
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309 | return (const bfd_target *) NULL; |
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310 | } |
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311 | |||
312 | /* Turn a COFF file into a BFD, but fail with bfd_error_wrong_format if it is |
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313 | not a COFF file. This is also used by ECOFF. */ |
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314 | |||
315 | const bfd_target * |
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316 | coff_object_p (bfd *abfd) |
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317 | { |
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318 | bfd_size_type filhsz; |
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319 | bfd_size_type aoutsz; |
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320 | unsigned int nscns; |
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321 | void * filehdr; |
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322 | struct internal_filehdr internal_f; |
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323 | struct internal_aouthdr internal_a; |
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324 | |||
325 | /* Figure out how much to read. */ |
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326 | filhsz = bfd_coff_filhsz (abfd); |
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327 | aoutsz = bfd_coff_aoutsz (abfd); |
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328 | |||
329 | filehdr = bfd_alloc (abfd, filhsz); |
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330 | if (filehdr == NULL) |
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331 | return NULL; |
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332 | if (bfd_bread (filehdr, filhsz, abfd) != filhsz) |
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333 | { |
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334 | if (bfd_get_error () != bfd_error_system_call) |
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335 | bfd_set_error (bfd_error_wrong_format); |
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336 | bfd_release (abfd, filehdr); |
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337 | return NULL; |
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338 | } |
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339 | bfd_coff_swap_filehdr_in (abfd, filehdr, &internal_f); |
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340 | bfd_release (abfd, filehdr); |
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341 | |||
342 | /* The XCOFF format has two sizes for the f_opthdr. SMALL_AOUTSZ |
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343 | (less than aoutsz) used in object files and AOUTSZ (equal to |
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344 | aoutsz) in executables. The bfd_coff_swap_aouthdr_in function |
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345 | expects this header to be aoutsz bytes in length, so we use that |
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346 | value in the call to bfd_alloc below. But we must be careful to |
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347 | only read in f_opthdr bytes in the call to bfd_bread. We should |
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348 | also attempt to catch corrupt or non-COFF binaries with a strange |
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349 | value for f_opthdr. */ |
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350 | if (! bfd_coff_bad_format_hook (abfd, &internal_f) |
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351 | || internal_f.f_opthdr > aoutsz) |
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352 | { |
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353 | bfd_set_error (bfd_error_wrong_format); |
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354 | return NULL; |
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355 | } |
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356 | nscns = internal_f.f_nscns; |
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357 | |||
358 | if (internal_f.f_opthdr) |
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359 | { |
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360 | void * opthdr; |
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361 | |||
362 | opthdr = bfd_alloc (abfd, aoutsz); |
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363 | if (opthdr == NULL) |
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364 | return NULL; |
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365 | if (bfd_bread (opthdr, (bfd_size_type) internal_f.f_opthdr, abfd) |
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366 | != internal_f.f_opthdr) |
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367 | { |
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368 | bfd_release (abfd, opthdr); |
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369 | return NULL; |
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370 | } |
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371 | bfd_coff_swap_aouthdr_in (abfd, opthdr, (void *) &internal_a); |
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372 | bfd_release (abfd, opthdr); |
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373 | } |
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374 | |||
375 | return coff_real_object_p (abfd, nscns, &internal_f, |
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376 | (internal_f.f_opthdr != 0 |
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377 | ? &internal_a |
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378 | : (struct internal_aouthdr *) NULL)); |
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379 | } |
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380 | |||
381 | /* Get the BFD section from a COFF symbol section number. */ |
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382 | |||
383 | asection * |
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384 | coff_section_from_bfd_index (bfd *abfd, int section_index) |
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385 | { |
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386 | struct bfd_section *answer = abfd->sections; |
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387 | |||
388 | if (section_index == N_ABS) |
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389 | return bfd_abs_section_ptr; |
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390 | if (section_index == N_UNDEF) |
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391 | return bfd_und_section_ptr; |
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392 | if (section_index == N_DEBUG) |
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393 | return bfd_abs_section_ptr; |
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394 | |||
395 | while (answer) |
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396 | { |
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397 | if (answer->target_index == section_index) |
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398 | return answer; |
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399 | answer = answer->next; |
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400 | } |
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401 | |||
402 | /* We should not reach this point, but the SCO 3.2v4 /lib/libc_s.a |
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403 | has a bad symbol table in biglitpow.o. */ |
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404 | return bfd_und_section_ptr; |
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405 | } |
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406 | |||
407 | /* Get the upper bound of a COFF symbol table. */ |
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408 | |||
409 | long |
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410 | coff_get_symtab_upper_bound (bfd *abfd) |
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411 | { |
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412 | if (!bfd_coff_slurp_symbol_table (abfd)) |
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413 | return -1; |
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414 | |||
415 | return (bfd_get_symcount (abfd) + 1) * (sizeof (coff_symbol_type *)); |
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416 | } |
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417 | |||
418 | /* Canonicalize a COFF symbol table. */ |
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419 | |||
420 | long |
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421 | coff_canonicalize_symtab (bfd *abfd, asymbol **alocation) |
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422 | { |
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423 | unsigned int counter; |
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424 | coff_symbol_type *symbase; |
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425 | coff_symbol_type **location = (coff_symbol_type **) alocation; |
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426 | |||
427 | if (!bfd_coff_slurp_symbol_table (abfd)) |
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428 | return -1; |
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429 | |||
430 | symbase = obj_symbols (abfd); |
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431 | counter = bfd_get_symcount (abfd); |
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432 | while (counter-- > 0) |
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433 | *location++ = symbase++; |
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434 | |||
435 | *location = NULL; |
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436 | |||
437 | return bfd_get_symcount (abfd); |
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438 | } |
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439 | |||
440 | /* Get the name of a symbol. The caller must pass in a buffer of size |
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441 | >= SYMNMLEN + 1. */ |
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442 | |||
443 | const char * |
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444 | _bfd_coff_internal_syment_name (bfd *abfd, |
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445 | const struct internal_syment *sym, |
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446 | char *buf) |
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447 | { |
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448 | /* FIXME: It's not clear this will work correctly if sizeof |
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449 | (_n_zeroes) != 4. */ |
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450 | if (sym->_n._n_n._n_zeroes != 0 |
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451 | || sym->_n._n_n._n_offset == 0) |
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452 | { |
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453 | memcpy (buf, sym->_n._n_name, SYMNMLEN); |
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454 | buf[SYMNMLEN] = '\0'; |
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455 | return buf; |
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456 | } |
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457 | else |
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458 | { |
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459 | const char *strings; |
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460 | |||
461 | BFD_ASSERT (sym->_n._n_n._n_offset >= STRING_SIZE_SIZE); |
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462 | strings = obj_coff_strings (abfd); |
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463 | if (strings == NULL) |
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464 | { |
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465 | strings = _bfd_coff_read_string_table (abfd); |
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466 | if (strings == NULL) |
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467 | return NULL; |
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468 | } |
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469 | return strings + sym->_n._n_n._n_offset; |
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470 | } |
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471 | } |
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472 | |||
473 | /* Read in and swap the relocs. This returns a buffer holding the |
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474 | relocs for section SEC in file ABFD. If CACHE is TRUE and |
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475 | INTERNAL_RELOCS is NULL, the relocs read in will be saved in case |
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476 | the function is called again. If EXTERNAL_RELOCS is not NULL, it |
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477 | is a buffer large enough to hold the unswapped relocs. If |
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478 | INTERNAL_RELOCS is not NULL, it is a buffer large enough to hold |
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479 | the swapped relocs. If REQUIRE_INTERNAL is TRUE, then the return |
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480 | value must be INTERNAL_RELOCS. The function returns NULL on error. */ |
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481 | |||
482 | struct internal_reloc * |
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483 | _bfd_coff_read_internal_relocs (bfd *abfd, |
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484 | asection *sec, |
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485 | bfd_boolean cache, |
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486 | bfd_byte *external_relocs, |
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487 | bfd_boolean require_internal, |
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488 | struct internal_reloc *internal_relocs) |
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489 | { |
||
490 | bfd_size_type relsz; |
||
491 | bfd_byte *free_external = NULL; |
||
492 | struct internal_reloc *free_internal = NULL; |
||
493 | bfd_byte *erel; |
||
494 | bfd_byte *erel_end; |
||
495 | struct internal_reloc *irel; |
||
496 | bfd_size_type amt; |
||
497 | |||
498 | if (sec->reloc_count == 0) |
||
499 | return internal_relocs; /* Nothing to do. */ |
||
500 | |||
501 | if (coff_section_data (abfd, sec) != NULL |
||
502 | && coff_section_data (abfd, sec)->relocs != NULL) |
||
503 | { |
||
504 | if (! require_internal) |
||
505 | return coff_section_data (abfd, sec)->relocs; |
||
506 | memcpy (internal_relocs, coff_section_data (abfd, sec)->relocs, |
||
507 | sec->reloc_count * sizeof (struct internal_reloc)); |
||
508 | return internal_relocs; |
||
509 | } |
||
510 | |||
511 | relsz = bfd_coff_relsz (abfd); |
||
512 | |||
513 | amt = sec->reloc_count * relsz; |
||
514 | if (external_relocs == NULL) |
||
515 | { |
||
516 | free_external = (bfd_byte *) bfd_malloc (amt); |
||
517 | if (free_external == NULL) |
||
518 | goto error_return; |
||
519 | external_relocs = free_external; |
||
520 | } |
||
521 | |||
522 | if (bfd_seek (abfd, sec->rel_filepos, SEEK_SET) != 0 |
||
523 | || bfd_bread (external_relocs, amt, abfd) != amt) |
||
524 | goto error_return; |
||
525 | |||
526 | if (internal_relocs == NULL) |
||
527 | { |
||
528 | amt = sec->reloc_count; |
||
529 | amt *= sizeof (struct internal_reloc); |
||
530 | free_internal = (struct internal_reloc *) bfd_malloc (amt); |
||
531 | if (free_internal == NULL) |
||
532 | goto error_return; |
||
533 | internal_relocs = free_internal; |
||
534 | } |
||
535 | |||
536 | /* Swap in the relocs. */ |
||
537 | erel = external_relocs; |
||
538 | erel_end = erel + relsz * sec->reloc_count; |
||
539 | irel = internal_relocs; |
||
540 | for (; erel < erel_end; erel += relsz, irel++) |
||
541 | bfd_coff_swap_reloc_in (abfd, (void *) erel, (void *) irel); |
||
542 | |||
543 | if (free_external != NULL) |
||
544 | { |
||
545 | free (free_external); |
||
546 | free_external = NULL; |
||
547 | } |
||
548 | |||
549 | if (cache && free_internal != NULL) |
||
550 | { |
||
551 | if (coff_section_data (abfd, sec) == NULL) |
||
552 | { |
||
553 | amt = sizeof (struct coff_section_tdata); |
||
554 | sec->used_by_bfd = bfd_zalloc (abfd, amt); |
||
555 | if (sec->used_by_bfd == NULL) |
||
556 | goto error_return; |
||
557 | coff_section_data (abfd, sec)->contents = NULL; |
||
558 | } |
||
559 | coff_section_data (abfd, sec)->relocs = free_internal; |
||
560 | } |
||
561 | |||
562 | return internal_relocs; |
||
563 | |||
564 | error_return: |
||
565 | if (free_external != NULL) |
||
566 | free (free_external); |
||
567 | if (free_internal != NULL) |
||
568 | free (free_internal); |
||
569 | return NULL; |
||
570 | } |
||
571 | |||
572 | /* Set lineno_count for the output sections of a COFF file. */ |
||
573 | |||
574 | int |
||
575 | coff_count_linenumbers (bfd *abfd) |
||
576 | { |
||
577 | unsigned int limit = bfd_get_symcount (abfd); |
||
578 | unsigned int i; |
||
579 | int total = 0; |
||
580 | asymbol **p; |
||
581 | asection *s; |
||
582 | |||
583 | if (limit == 0) |
||
584 | { |
||
585 | /* This may be from the backend linker, in which case the |
||
586 | lineno_count in the sections is correct. */ |
||
587 | for (s = abfd->sections; s != NULL; s = s->next) |
||
588 | total += s->lineno_count; |
||
589 | return total; |
||
590 | } |
||
591 | |||
592 | for (s = abfd->sections; s != NULL; s = s->next) |
||
593 | BFD_ASSERT (s->lineno_count == 0); |
||
594 | |||
595 | for (p = abfd->outsymbols, i = 0; i < limit; i++, p++) |
||
596 | { |
||
597 | asymbol *q_maybe = *p; |
||
598 | |||
599 | if (bfd_family_coff (bfd_asymbol_bfd (q_maybe))) |
||
600 | { |
||
601 | coff_symbol_type *q = coffsymbol (q_maybe); |
||
602 | |||
603 | /* The AIX 4.1 compiler can sometimes generate line numbers |
||
604 | attached to debugging symbols. We try to simply ignore |
||
605 | those here. */ |
||
606 | if (q->lineno != NULL |
||
607 | && q->symbol.section->owner != NULL) |
||
608 | { |
||
609 | /* This symbol has line numbers. Increment the owning |
||
610 | section's linenumber count. */ |
||
611 | alent *l = q->lineno; |
||
612 | |||
613 | do |
||
614 | { |
||
615 | asection * sec = q->symbol.section->output_section; |
||
616 | |||
617 | /* Do not try to update fields in read-only sections. */ |
||
618 | if (! bfd_is_const_section (sec)) |
||
619 | sec->lineno_count ++; |
||
620 | |||
621 | ++total; |
||
622 | ++l; |
||
623 | } |
||
624 | while (l->line_number != 0); |
||
625 | } |
||
626 | } |
||
627 | } |
||
628 | |||
629 | return total; |
||
630 | } |
||
631 | |||
632 | /* Takes a bfd and a symbol, returns a pointer to the coff specific |
||
633 | area of the symbol if there is one. */ |
||
634 | |||
635 | coff_symbol_type * |
||
636 | coff_symbol_from (bfd *ignore_abfd ATTRIBUTE_UNUSED, |
||
637 | asymbol *symbol) |
||
638 | { |
||
639 | if (!bfd_family_coff (bfd_asymbol_bfd (symbol))) |
||
640 | return (coff_symbol_type *) NULL; |
||
641 | |||
642 | if (bfd_asymbol_bfd (symbol)->tdata.coff_obj_data == (coff_data_type *) NULL) |
||
643 | return (coff_symbol_type *) NULL; |
||
644 | |||
645 | return (coff_symbol_type *) symbol; |
||
646 | } |
||
647 | |||
648 | static void |
||
649 | fixup_symbol_value (bfd *abfd, |
||
650 | coff_symbol_type *coff_symbol_ptr, |
||
651 | struct internal_syment *syment) |
||
652 | { |
||
653 | /* Normalize the symbol flags. */ |
||
654 | if (coff_symbol_ptr->symbol.section |
||
655 | && bfd_is_com_section (coff_symbol_ptr->symbol.section)) |
||
656 | { |
||
657 | /* A common symbol is undefined with a value. */ |
||
658 | syment->n_scnum = N_UNDEF; |
||
659 | syment->n_value = coff_symbol_ptr->symbol.value; |
||
660 | } |
||
661 | else if ((coff_symbol_ptr->symbol.flags & BSF_DEBUGGING) != 0 |
||
662 | && (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING_RELOC) == 0) |
||
663 | { |
||
664 | syment->n_value = coff_symbol_ptr->symbol.value; |
||
665 | } |
||
666 | else if (bfd_is_und_section (coff_symbol_ptr->symbol.section)) |
||
667 | { |
||
668 | syment->n_scnum = N_UNDEF; |
||
669 | syment->n_value = 0; |
||
670 | } |
||
671 | /* FIXME: Do we need to handle the absolute section here? */ |
||
672 | else |
||
673 | { |
||
674 | if (coff_symbol_ptr->symbol.section) |
||
675 | { |
||
676 | syment->n_scnum = |
||
677 | coff_symbol_ptr->symbol.section->output_section->target_index; |
||
678 | |||
679 | syment->n_value = (coff_symbol_ptr->symbol.value |
||
680 | + coff_symbol_ptr->symbol.section->output_offset); |
||
681 | if (! obj_pe (abfd)) |
||
682 | { |
||
683 | syment->n_value += (syment->n_sclass == C_STATLAB) |
||
684 | ? coff_symbol_ptr->symbol.section->output_section->lma |
||
685 | : coff_symbol_ptr->symbol.section->output_section->vma; |
||
686 | } |
||
687 | } |
||
688 | else |
||
689 | { |
||
690 | BFD_ASSERT (0); |
||
691 | /* This can happen, but I don't know why yet (steve@cygnus.com) */ |
||
692 | syment->n_scnum = N_ABS; |
||
693 | syment->n_value = coff_symbol_ptr->symbol.value; |
||
694 | } |
||
695 | } |
||
696 | } |
||
697 | |||
698 | /* Run through all the symbols in the symbol table and work out what |
||
699 | their indexes into the symbol table will be when output. |
||
700 | |||
701 | Coff requires that each C_FILE symbol points to the next one in the |
||
702 | chain, and that the last one points to the first external symbol. We |
||
703 | do that here too. */ |
||
704 | |||
705 | bfd_boolean |
||
706 | coff_renumber_symbols (bfd *bfd_ptr, int *first_undef) |
||
707 | { |
||
708 | unsigned int symbol_count = bfd_get_symcount (bfd_ptr); |
||
709 | asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols; |
||
710 | unsigned int native_index = 0; |
||
711 | struct internal_syment *last_file = NULL; |
||
712 | unsigned int symbol_index; |
||
713 | |||
714 | /* COFF demands that undefined symbols come after all other symbols. |
||
715 | Since we don't need to impose this extra knowledge on all our |
||
716 | client programs, deal with that here. Sort the symbol table; |
||
717 | just move the undefined symbols to the end, leaving the rest |
||
718 | alone. The O'Reilly book says that defined global symbols come |
||
719 | at the end before the undefined symbols, so we do that here as |
||
720 | well. */ |
||
721 | /* @@ Do we have some condition we could test for, so we don't always |
||
722 | have to do this? I don't think relocatability is quite right, but |
||
723 | I'm not certain. [raeburn:19920508.1711EST] */ |
||
724 | { |
||
725 | asymbol **newsyms; |
||
726 | unsigned int i; |
||
727 | bfd_size_type amt; |
||
728 | |||
729 | amt = sizeof (asymbol *) * ((bfd_size_type) symbol_count + 1); |
||
730 | newsyms = (asymbol **) bfd_alloc (bfd_ptr, amt); |
||
731 | if (!newsyms) |
||
732 | return FALSE; |
||
733 | bfd_ptr->outsymbols = newsyms; |
||
734 | for (i = 0; i < symbol_count; i++) |
||
735 | if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) != 0 |
||
736 | || (!bfd_is_und_section (symbol_ptr_ptr[i]->section) |
||
737 | && !bfd_is_com_section (symbol_ptr_ptr[i]->section) |
||
738 | && ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) != 0 |
||
739 | || ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK)) |
||
740 | == 0)))) |
||
741 | *newsyms++ = symbol_ptr_ptr[i]; |
||
742 | |||
743 | for (i = 0; i < symbol_count; i++) |
||
744 | if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0 |
||
745 | && !bfd_is_und_section (symbol_ptr_ptr[i]->section) |
||
746 | && (bfd_is_com_section (symbol_ptr_ptr[i]->section) |
||
747 | || ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) == 0 |
||
748 | && ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK)) |
||
749 | != 0)))) |
||
750 | *newsyms++ = symbol_ptr_ptr[i]; |
||
751 | |||
752 | *first_undef = newsyms - bfd_ptr->outsymbols; |
||
753 | |||
754 | for (i = 0; i < symbol_count; i++) |
||
755 | if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0 |
||
756 | && bfd_is_und_section (symbol_ptr_ptr[i]->section)) |
||
757 | *newsyms++ = symbol_ptr_ptr[i]; |
||
758 | *newsyms = (asymbol *) NULL; |
||
759 | symbol_ptr_ptr = bfd_ptr->outsymbols; |
||
760 | } |
||
761 | |||
762 | for (symbol_index = 0; symbol_index < symbol_count; symbol_index++) |
||
763 | { |
||
764 | coff_symbol_type *coff_symbol_ptr = coff_symbol_from (bfd_ptr, symbol_ptr_ptr[symbol_index]); |
||
765 | symbol_ptr_ptr[symbol_index]->udata.i = symbol_index; |
||
766 | if (coff_symbol_ptr && coff_symbol_ptr->native) |
||
767 | { |
||
768 | combined_entry_type *s = coff_symbol_ptr->native; |
||
769 | int i; |
||
770 | |||
771 | if (s->u.syment.n_sclass == C_FILE) |
||
772 | { |
||
773 | if (last_file != NULL) |
||
774 | last_file->n_value = native_index; |
||
775 | last_file = &(s->u.syment); |
||
776 | } |
||
777 | else |
||
778 | /* Modify the symbol values according to their section and |
||
779 | type. */ |
||
780 | fixup_symbol_value (bfd_ptr, coff_symbol_ptr, &(s->u.syment)); |
||
781 | |||
782 | for (i = 0; i < s->u.syment.n_numaux + 1; i++) |
||
783 | s[i].offset = native_index++; |
||
784 | } |
||
785 | else |
||
786 | native_index++; |
||
787 | } |
||
788 | |||
789 | obj_conv_table_size (bfd_ptr) = native_index; |
||
790 | |||
791 | return TRUE; |
||
792 | } |
||
793 | |||
794 | /* Run thorough the symbol table again, and fix it so that all |
||
795 | pointers to entries are changed to the entries' index in the output |
||
796 | symbol table. */ |
||
797 | |||
798 | void |
||
799 | coff_mangle_symbols (bfd *bfd_ptr) |
||
800 | { |
||
801 | unsigned int symbol_count = bfd_get_symcount (bfd_ptr); |
||
802 | asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols; |
||
803 | unsigned int symbol_index; |
||
804 | |||
805 | for (symbol_index = 0; symbol_index < symbol_count; symbol_index++) |
||
806 | { |
||
807 | coff_symbol_type *coff_symbol_ptr = |
||
808 | coff_symbol_from (bfd_ptr, symbol_ptr_ptr[symbol_index]); |
||
809 | |||
810 | if (coff_symbol_ptr && coff_symbol_ptr->native) |
||
811 | { |
||
812 | int i; |
||
813 | combined_entry_type *s = coff_symbol_ptr->native; |
||
814 | |||
815 | if (s->fix_value) |
||
816 | { |
||
817 | /* FIXME: We should use a union here. */ |
||
818 | s->u.syment.n_value = |
||
819 | (bfd_hostptr_t) ((combined_entry_type *) |
||
820 | ((bfd_hostptr_t) s->u.syment.n_value))->offset; |
||
821 | s->fix_value = 0; |
||
822 | } |
||
823 | if (s->fix_line) |
||
824 | { |
||
825 | /* The value is the offset into the line number entries |
||
826 | for the symbol's section. On output, the symbol's |
||
827 | section should be N_DEBUG. */ |
||
828 | s->u.syment.n_value = |
||
829 | (coff_symbol_ptr->symbol.section->output_section->line_filepos |
||
830 | + s->u.syment.n_value * bfd_coff_linesz (bfd_ptr)); |
||
831 | coff_symbol_ptr->symbol.section = |
||
832 | coff_section_from_bfd_index (bfd_ptr, N_DEBUG); |
||
833 | BFD_ASSERT (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING); |
||
834 | } |
||
835 | for (i = 0; i < s->u.syment.n_numaux; i++) |
||
836 | { |
||
837 | combined_entry_type *a = s + i + 1; |
||
838 | if (a->fix_tag) |
||
839 | { |
||
840 | a->u.auxent.x_sym.x_tagndx.l = |
||
841 | a->u.auxent.x_sym.x_tagndx.p->offset; |
||
842 | a->fix_tag = 0; |
||
843 | } |
||
844 | if (a->fix_end) |
||
845 | { |
||
846 | a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l = |
||
847 | a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p->offset; |
||
848 | a->fix_end = 0; |
||
849 | } |
||
850 | if (a->fix_scnlen) |
||
851 | { |
||
852 | a->u.auxent.x_csect.x_scnlen.l = |
||
853 | a->u.auxent.x_csect.x_scnlen.p->offset; |
||
854 | a->fix_scnlen = 0; |
||
855 | } |
||
856 | } |
||
857 | } |
||
858 | } |
||
859 | } |
||
860 | |||
861 | static void |
||
862 | coff_fix_symbol_name (bfd *abfd, |
||
863 | asymbol *symbol, |
||
864 | combined_entry_type *native, |
||
865 | bfd_size_type *string_size_p, |
||
866 | asection **debug_string_section_p, |
||
867 | bfd_size_type *debug_string_size_p) |
||
868 | { |
||
869 | unsigned int name_length; |
||
870 | union internal_auxent *auxent; |
||
871 | char *name = (char *) (symbol->name); |
||
872 | |||
873 | if (name == NULL) |
||
874 | { |
||
875 | /* COFF symbols always have names, so we'll make one up. */ |
||
876 | symbol->name = "strange"; |
||
877 | name = (char *) symbol->name; |
||
878 | } |
||
879 | name_length = strlen (name); |
||
880 | |||
881 | if (native->u.syment.n_sclass == C_FILE |
||
882 | && native->u.syment.n_numaux > 0) |
||
883 | { |
||
884 | unsigned int filnmlen; |
||
885 | |||
886 | if (bfd_coff_force_symnames_in_strings (abfd)) |
||
887 | { |
||
888 | native->u.syment._n._n_n._n_offset = |
||
889 | (*string_size_p + STRING_SIZE_SIZE); |
||
890 | native->u.syment._n._n_n._n_zeroes = 0; |
||
891 | *string_size_p += 6; /* strlen(".file") + 1 */ |
||
892 | } |
||
893 | else |
||
894 | strncpy (native->u.syment._n._n_name, ".file", SYMNMLEN); |
||
895 | |||
896 | auxent = &(native + 1)->u.auxent; |
||
897 | |||
898 | filnmlen = bfd_coff_filnmlen (abfd); |
||
899 | |||
900 | if (bfd_coff_long_filenames (abfd)) |
||
901 | { |
||
902 | if (name_length <= filnmlen) |
||
903 | strncpy (auxent->x_file.x_fname, name, filnmlen); |
||
904 | else |
||
905 | { |
||
906 | auxent->x_file.x_n.x_offset = *string_size_p + STRING_SIZE_SIZE; |
||
907 | auxent->x_file.x_n.x_zeroes = 0; |
||
908 | *string_size_p += name_length + 1; |
||
909 | } |
||
910 | } |
||
911 | else |
||
912 | { |
||
913 | strncpy (auxent->x_file.x_fname, name, filnmlen); |
||
914 | if (name_length > filnmlen) |
||
915 | name[filnmlen] = '\0'; |
||
916 | } |
||
917 | } |
||
918 | else |
||
919 | { |
||
920 | if (name_length <= SYMNMLEN && !bfd_coff_force_symnames_in_strings (abfd)) |
||
921 | /* This name will fit into the symbol neatly. */ |
||
922 | strncpy (native->u.syment._n._n_name, symbol->name, SYMNMLEN); |
||
923 | |||
924 | else if (!bfd_coff_symname_in_debug (abfd, &native->u.syment)) |
||
925 | { |
||
926 | native->u.syment._n._n_n._n_offset = (*string_size_p |
||
927 | + STRING_SIZE_SIZE); |
||
928 | native->u.syment._n._n_n._n_zeroes = 0; |
||
929 | *string_size_p += name_length + 1; |
||
930 | } |
||
931 | else |
||
932 | { |
||
933 | file_ptr filepos; |
||
934 | bfd_byte buf[4]; |
||
935 | int prefix_len = bfd_coff_debug_string_prefix_length (abfd); |
||
936 | |||
937 | /* This name should be written into the .debug section. For |
||
938 | some reason each name is preceded by a two byte length |
||
939 | and also followed by a null byte. FIXME: We assume that |
||
940 | the .debug section has already been created, and that it |
||
941 | is large enough. */ |
||
942 | if (*debug_string_section_p == (asection *) NULL) |
||
943 | *debug_string_section_p = bfd_get_section_by_name (abfd, ".debug"); |
||
944 | filepos = bfd_tell (abfd); |
||
945 | if (prefix_len == 4) |
||
946 | bfd_put_32 (abfd, (bfd_vma) (name_length + 1), buf); |
||
947 | else |
||
948 | bfd_put_16 (abfd, (bfd_vma) (name_length + 1), buf); |
||
949 | |||
950 | if (!bfd_set_section_contents (abfd, |
||
951 | *debug_string_section_p, |
||
952 | (void *) buf, |
||
953 | (file_ptr) *debug_string_size_p, |
||
954 | (bfd_size_type) prefix_len) |
||
955 | || !bfd_set_section_contents (abfd, |
||
956 | *debug_string_section_p, |
||
957 | (void *) symbol->name, |
||
958 | (file_ptr) (*debug_string_size_p |
||
959 | + prefix_len), |
||
960 | (bfd_size_type) name_length + 1)) |
||
961 | abort (); |
||
962 | if (bfd_seek (abfd, filepos, SEEK_SET) != 0) |
||
963 | abort (); |
||
964 | native->u.syment._n._n_n._n_offset = |
||
965 | *debug_string_size_p + prefix_len; |
||
966 | native->u.syment._n._n_n._n_zeroes = 0; |
||
967 | *debug_string_size_p += name_length + 1 + prefix_len; |
||
968 | } |
||
969 | } |
||
970 | } |
||
971 | |||
972 | /* We need to keep track of the symbol index so that when we write out |
||
973 | the relocs we can get the index for a symbol. This method is a |
||
974 | hack. FIXME. */ |
||
975 | |||
976 | #define set_index(symbol, idx) ((symbol)->udata.i = (idx)) |
||
977 | |||
978 | /* Write a symbol out to a COFF file. */ |
||
979 | |||
980 | static bfd_boolean |
||
981 | coff_write_symbol (bfd *abfd, |
||
982 | asymbol *symbol, |
||
983 | combined_entry_type *native, |
||
984 | bfd_vma *written, |
||
985 | bfd_size_type *string_size_p, |
||
986 | asection **debug_string_section_p, |
||
987 | bfd_size_type *debug_string_size_p) |
||
988 | { |
||
989 | unsigned int numaux = native->u.syment.n_numaux; |
||
990 | int type = native->u.syment.n_type; |
||
991 | int n_sclass = (int) native->u.syment.n_sclass; |
||
992 | asection *output_section = symbol->section->output_section |
||
993 | ? symbol->section->output_section |
||
994 | : symbol->section; |
||
995 | void * buf; |
||
996 | bfd_size_type symesz; |
||
997 | |||
998 | if (native->u.syment.n_sclass == C_FILE) |
||
999 | symbol->flags |= BSF_DEBUGGING; |
||
1000 | |||
1001 | if (symbol->flags & BSF_DEBUGGING |
||
1002 | && bfd_is_abs_section (symbol->section)) |
||
1003 | native->u.syment.n_scnum = N_DEBUG; |
||
1004 | |||
1005 | else if (bfd_is_abs_section (symbol->section)) |
||
1006 | native->u.syment.n_scnum = N_ABS; |
||
1007 | |||
1008 | else if (bfd_is_und_section (symbol->section)) |
||
1009 | native->u.syment.n_scnum = N_UNDEF; |
||
1010 | |||
1011 | else |
||
1012 | native->u.syment.n_scnum = |
||
1013 | output_section->target_index; |
||
1014 | |||
1015 | coff_fix_symbol_name (abfd, symbol, native, string_size_p, |
||
1016 | debug_string_section_p, debug_string_size_p); |
||
1017 | |||
1018 | symesz = bfd_coff_symesz (abfd); |
||
1019 | buf = bfd_alloc (abfd, symesz); |
||
1020 | if (!buf) |
||
1021 | return FALSE; |
||
1022 | bfd_coff_swap_sym_out (abfd, &native->u.syment, buf); |
||
1023 | if (bfd_bwrite (buf, symesz, abfd) != symesz) |
||
1024 | return FALSE; |
||
1025 | bfd_release (abfd, buf); |
||
1026 | |||
1027 | if (native->u.syment.n_numaux > 0) |
||
1028 | { |
||
1029 | bfd_size_type auxesz; |
||
1030 | unsigned int j; |
||
1031 | |||
1032 | auxesz = bfd_coff_auxesz (abfd); |
||
1033 | buf = bfd_alloc (abfd, auxesz); |
||
1034 | if (!buf) |
||
1035 | return FALSE; |
||
1036 | for (j = 0; j < native->u.syment.n_numaux; j++) |
||
1037 | { |
||
1038 | bfd_coff_swap_aux_out (abfd, |
||
1039 | &((native + j + 1)->u.auxent), |
||
1040 | type, n_sclass, (int) j, |
||
1041 | native->u.syment.n_numaux, |
||
1042 | buf); |
||
1043 | if (bfd_bwrite (buf, auxesz, abfd) != auxesz) |
||
1044 | return FALSE; |
||
1045 | } |
||
1046 | bfd_release (abfd, buf); |
||
1047 | } |
||
1048 | |||
1049 | /* Store the index for use when we write out the relocs. */ |
||
1050 | set_index (symbol, *written); |
||
1051 | |||
1052 | *written += numaux + 1; |
||
1053 | return TRUE; |
||
1054 | } |
||
1055 | |||
1056 | /* Write out a symbol to a COFF file that does not come from a COFF |
||
1057 | file originally. This symbol may have been created by the linker, |
||
1058 | or we may be linking a non COFF file to a COFF file. */ |
||
1059 | |||
1060 | bfd_boolean |
||
1061 | coff_write_alien_symbol (bfd *abfd, |
||
1062 | asymbol *symbol, |
||
1063 | struct internal_syment *isym, |
||
1064 | bfd_vma *written, |
||
1065 | bfd_size_type *string_size_p, |
||
1066 | asection **debug_string_section_p, |
||
1067 | bfd_size_type *debug_string_size_p) |
||
1068 | { |
||
1069 | combined_entry_type *native; |
||
1070 | combined_entry_type dummy[2]; |
||
1071 | asection *output_section = symbol->section->output_section |
||
1072 | ? symbol->section->output_section |
||
1073 | : symbol->section; |
||
1074 | struct bfd_link_info *link_info = coff_data (abfd)->link_info; |
||
1075 | bfd_boolean ret; |
||
1076 | |||
1077 | if ((!link_info || link_info->strip_discarded) |
||
1078 | && !bfd_is_abs_section (symbol->section) |
||
1079 | && symbol->section->output_section == bfd_abs_section_ptr) |
||
1080 | { |
||
1081 | symbol->name = ""; |
||
1082 | if (isym != NULL) |
||
1083 | memset (isym, 0, sizeof(*isym)); |
||
1084 | return TRUE; |
||
1085 | } |
||
1086 | native = dummy; |
||
1087 | native->u.syment.n_type = T_NULL; |
||
1088 | native->u.syment.n_flags = 0; |
||
1089 | native->u.syment.n_numaux = 0; |
||
1090 | if (bfd_is_und_section (symbol->section)) |
||
1091 | { |
||
1092 | native->u.syment.n_scnum = N_UNDEF; |
||
1093 | native->u.syment.n_value = symbol->value; |
||
1094 | } |
||
1095 | else if (bfd_is_com_section (symbol->section)) |
||
1096 | { |
||
1097 | native->u.syment.n_scnum = N_UNDEF; |
||
1098 | native->u.syment.n_value = symbol->value; |
||
1099 | } |
||
1100 | else if (symbol->flags & BSF_FILE) |
||
1101 | { |
||
1102 | native->u.syment.n_scnum = N_DEBUG; |
||
1103 | native->u.syment.n_numaux = 1; |
||
1104 | } |
||
1105 | else if (symbol->flags & BSF_DEBUGGING) |
||
1106 | { |
||
1107 | /* There isn't much point to writing out a debugging symbol |
||
1108 | unless we are prepared to convert it into COFF debugging |
||
1109 | format. So, we just ignore them. We must clobber the symbol |
||
1110 | name to keep it from being put in the string table. */ |
||
1111 | symbol->name = ""; |
||
1112 | if (isym != NULL) |
||
1113 | memset (isym, 0, sizeof(*isym)); |
||
1114 | return TRUE; |
||
1115 | } |
||
1116 | else |
||
1117 | { |
||
1118 | native->u.syment.n_scnum = output_section->target_index; |
||
1119 | native->u.syment.n_value = (symbol->value |
||
1120 | + symbol->section->output_offset); |
||
1121 | if (! obj_pe (abfd)) |
||
1122 | native->u.syment.n_value += output_section->vma; |
||
1123 | |||
1124 | /* Copy the any flags from the file header into the symbol. |
||
1125 | FIXME: Why? */ |
||
1126 | { |
||
1127 | coff_symbol_type *c = coff_symbol_from (abfd, symbol); |
||
1128 | if (c != (coff_symbol_type *) NULL) |
||
1129 | native->u.syment.n_flags = bfd_asymbol_bfd (&c->symbol)->flags; |
||
1130 | } |
||
1131 | } |
||
1132 | |||
1133 | native->u.syment.n_type = 0; |
||
1134 | if (symbol->flags & BSF_FILE) |
||
1135 | native->u.syment.n_sclass = C_FILE; |
||
1136 | else if (symbol->flags & BSF_LOCAL) |
||
1137 | native->u.syment.n_sclass = C_STAT; |
||
1138 | else if (symbol->flags & BSF_WEAK) |
||
1139 | native->u.syment.n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT; |
||
1140 | else |
||
1141 | native->u.syment.n_sclass = C_EXT; |
||
1142 | |||
1143 | ret = coff_write_symbol (abfd, symbol, native, written, string_size_p, |
||
1144 | debug_string_section_p, debug_string_size_p); |
||
1145 | if (isym != NULL) |
||
1146 | *isym = native->u.syment; |
||
1147 | return ret; |
||
1148 | } |
||
1149 | |||
1150 | /* Write a native symbol to a COFF file. */ |
||
1151 | |||
1152 | static bfd_boolean |
||
1153 | coff_write_native_symbol (bfd *abfd, |
||
1154 | coff_symbol_type *symbol, |
||
1155 | bfd_vma *written, |
||
1156 | bfd_size_type *string_size_p, |
||
1157 | asection **debug_string_section_p, |
||
1158 | bfd_size_type *debug_string_size_p) |
||
1159 | { |
||
1160 | combined_entry_type *native = symbol->native; |
||
1161 | alent *lineno = symbol->lineno; |
||
1162 | struct bfd_link_info *link_info = coff_data (abfd)->link_info; |
||
1163 | |||
1164 | if ((!link_info || link_info->strip_discarded) |
||
1165 | && !bfd_is_abs_section (symbol->symbol.section) |
||
1166 | && symbol->symbol.section->output_section == bfd_abs_section_ptr) |
||
1167 | { |
||
1168 | symbol->symbol.name = ""; |
||
1169 | return TRUE; |
||
1170 | } |
||
1171 | |||
1172 | /* If this symbol has an associated line number, we must store the |
||
1173 | symbol index in the line number field. We also tag the auxent to |
||
1174 | point to the right place in the lineno table. */ |
||
1175 | if (lineno && !symbol->done_lineno && symbol->symbol.section->owner != NULL) |
||
1176 | { |
||
1177 | unsigned int count = 0; |
||
1178 | |||
1179 | lineno[count].u.offset = *written; |
||
1180 | if (native->u.syment.n_numaux) |
||
1181 | { |
||
1182 | union internal_auxent *a = &((native + 1)->u.auxent); |
||
1183 | |||
1184 | a->x_sym.x_fcnary.x_fcn.x_lnnoptr = |
||
1185 | symbol->symbol.section->output_section->moving_line_filepos; |
||
1186 | } |
||
1187 | |||
1188 | /* Count and relocate all other linenumbers. */ |
||
1189 | count++; |
||
1190 | while (lineno[count].line_number != 0) |
||
1191 | { |
||
1192 | lineno[count].u.offset += |
||
1193 | (symbol->symbol.section->output_section->vma |
||
1194 | + symbol->symbol.section->output_offset); |
||
1195 | count++; |
||
1196 | } |
||
1197 | symbol->done_lineno = TRUE; |
||
1198 | |||
1199 | if (! bfd_is_const_section (symbol->symbol.section->output_section)) |
||
1200 | symbol->symbol.section->output_section->moving_line_filepos += |
||
1201 | count * bfd_coff_linesz (abfd); |
||
1202 | } |
||
1203 | |||
1204 | return coff_write_symbol (abfd, &(symbol->symbol), native, written, |
||
1205 | string_size_p, debug_string_section_p, |
||
1206 | debug_string_size_p); |
||
1207 | } |
||
1208 | |||
1209 | static void |
||
1210 | null_error_handler (const char * fmt ATTRIBUTE_UNUSED, ...) |
||
1211 | { |
||
1212 | } |
||
1213 | |||
1214 | /* Write out the COFF symbols. */ |
||
1215 | |||
1216 | bfd_boolean |
||
1217 | coff_write_symbols (bfd *abfd) |
||
1218 | { |
||
1219 | bfd_size_type string_size; |
||
1220 | asection *debug_string_section; |
||
1221 | bfd_size_type debug_string_size; |
||
1222 | unsigned int i; |
||
1223 | unsigned int limit = bfd_get_symcount (abfd); |
||
1224 | bfd_vma written = 0; |
||
1225 | asymbol **p; |
||
1226 | |||
1227 | string_size = 0; |
||
1228 | debug_string_section = NULL; |
||
1229 | debug_string_size = 0; |
||
1230 | |||
1231 | /* If this target supports long section names, they must be put into |
||
1232 | the string table. This is supported by PE. This code must |
||
1233 | handle section names just as they are handled in |
||
1234 | coff_write_object_contents. */ |
||
1235 | if (bfd_coff_long_section_names (abfd)) |
||
1236 | { |
||
1237 | asection *o; |
||
1238 | |||
1239 | for (o = abfd->sections; o != NULL; o = o->next) |
||
1240 | { |
||
1241 | size_t len; |
||
1242 | |||
1243 | len = strlen (o->name); |
||
1244 | if (len > SCNNMLEN) |
||
1245 | string_size += len + 1; |
||
1246 | } |
||
1247 | } |
||
1248 | |||
1249 | /* Seek to the right place. */ |
||
1250 | if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0) |
||
1251 | return FALSE; |
||
1252 | |||
1253 | /* Output all the symbols we have. */ |
||
1254 | written = 0; |
||
1255 | for (p = abfd->outsymbols, i = 0; i < limit; i++, p++) |
||
1256 | { |
||
1257 | asymbol *symbol = *p; |
||
1258 | coff_symbol_type *c_symbol = coff_symbol_from (abfd, symbol); |
||
1259 | |||
1260 | if (c_symbol == (coff_symbol_type *) NULL |
||
1261 | || c_symbol->native == (combined_entry_type *) NULL) |
||
1262 | { |
||
1263 | if (!coff_write_alien_symbol (abfd, symbol, NULL, &written, |
||
1264 | &string_size, &debug_string_section, |
||
1265 | &debug_string_size)) |
||
1266 | return FALSE; |
||
1267 | } |
||
1268 | else |
||
1269 | { |
||
1270 | if (coff_backend_info (abfd)->_bfd_coff_classify_symbol != NULL) |
||
1271 | { |
||
1272 | bfd_error_handler_type current_error_handler; |
||
1273 | enum coff_symbol_classification sym_class; |
||
1274 | unsigned char *n_sclass; |
||
1275 | |||
1276 | /* Suppress error reporting by bfd_coff_classify_symbol. |
||
1277 | Error messages can be generated when we are processing a local |
||
1278 | symbol which has no associated section and we do not have to |
||
1279 | worry about this, all we need to know is that it is local. */ |
||
1280 | current_error_handler = bfd_set_error_handler (null_error_handler); |
||
1281 | sym_class = bfd_coff_classify_symbol (abfd, |
||
1282 | &c_symbol->native->u.syment); |
||
1283 | (void) bfd_set_error_handler (current_error_handler); |
||
1284 | |||
1285 | n_sclass = &c_symbol->native->u.syment.n_sclass; |
||
1286 | |||
1287 | /* If the symbol class has been changed (eg objcopy/ld script/etc) |
||
1288 | we cannot retain the existing sclass from the original symbol. |
||
1289 | Weak symbols only have one valid sclass, so just set it always. |
||
1290 | If it is not local class and should be, set it C_STAT. |
||
1291 | If it is global and not classified as global, or if it is |
||
1292 | weak (which is also classified as global), set it C_EXT. */ |
||
1293 | |||
1294 | if (symbol->flags & BSF_WEAK) |
||
1295 | *n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT; |
||
1296 | else if (symbol->flags & BSF_LOCAL && sym_class != COFF_SYMBOL_LOCAL) |
||
1297 | *n_sclass = C_STAT; |
||
1298 | else if (symbol->flags & BSF_GLOBAL |
||
1299 | && (sym_class != COFF_SYMBOL_GLOBAL |
||
1300 | #ifdef COFF_WITH_PE |
||
1301 | || *n_sclass == C_NT_WEAK |
||
1302 | #endif |
||
1303 | || *n_sclass == C_WEAKEXT)) |
||
1304 | c_symbol->native->u.syment.n_sclass = C_EXT; |
||
1305 | } |
||
1306 | |||
1307 | if (!coff_write_native_symbol (abfd, c_symbol, &written, |
||
1308 | &string_size, &debug_string_section, |
||
1309 | &debug_string_size)) |
||
1310 | return FALSE; |
||
1311 | } |
||
1312 | } |
||
1313 | |||
1314 | obj_raw_syment_count (abfd) = written; |
||
1315 | |||
1316 | /* Now write out strings. */ |
||
1317 | if (string_size != 0) |
||
1318 | { |
||
1319 | unsigned int size = string_size + STRING_SIZE_SIZE; |
||
1320 | bfd_byte buffer[STRING_SIZE_SIZE]; |
||
1321 | |||
1322 | #if STRING_SIZE_SIZE == 4 |
||
1323 | H_PUT_32 (abfd, size, buffer); |
||
1324 | #else |
||
1325 | #error Change H_PUT_32 |
||
1326 | #endif |
||
1327 | if (bfd_bwrite ((void *) buffer, (bfd_size_type) sizeof (buffer), abfd) |
||
1328 | != sizeof (buffer)) |
||
1329 | return FALSE; |
||
1330 | |||
1331 | /* Handle long section names. This code must handle section |
||
1332 | names just as they are handled in coff_write_object_contents. */ |
||
1333 | if (bfd_coff_long_section_names (abfd)) |
||
1334 | { |
||
1335 | asection *o; |
||
1336 | |||
1337 | for (o = abfd->sections; o != NULL; o = o->next) |
||
1338 | { |
||
1339 | size_t len; |
||
1340 | |||
1341 | len = strlen (o->name); |
||
1342 | if (len > SCNNMLEN) |
||
1343 | { |
||
1344 | if (bfd_bwrite (o->name, (bfd_size_type) (len + 1), abfd) |
||
1345 | != len + 1) |
||
1346 | return FALSE; |
||
1347 | } |
||
1348 | } |
||
1349 | } |
||
1350 | |||
1351 | for (p = abfd->outsymbols, i = 0; |
||
1352 | i < limit; |
||
1353 | i++, p++) |
||
1354 | { |
||
1355 | asymbol *q = *p; |
||
1356 | size_t name_length = strlen (q->name); |
||
1357 | coff_symbol_type *c_symbol = coff_symbol_from (abfd, q); |
||
1358 | size_t maxlen; |
||
1359 | |||
1360 | /* Figure out whether the symbol name should go in the string |
||
1361 | table. Symbol names that are short enough are stored |
||
1362 | directly in the syment structure. File names permit a |
||
1363 | different, longer, length in the syment structure. On |
||
1364 | XCOFF, some symbol names are stored in the .debug section |
||
1365 | rather than in the string table. */ |
||
1366 | |||
1367 | if (c_symbol == NULL |
||
1368 | || c_symbol->native == NULL) |
||
1369 | /* This is not a COFF symbol, so it certainly is not a |
||
1370 | file name, nor does it go in the .debug section. */ |
||
1371 | maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN; |
||
1372 | |||
1373 | else if (bfd_coff_symname_in_debug (abfd, |
||
1374 | &c_symbol->native->u.syment)) |
||
1375 | /* This symbol name is in the XCOFF .debug section. |
||
1376 | Don't write it into the string table. */ |
||
1377 | maxlen = name_length; |
||
1378 | |||
1379 | else if (c_symbol->native->u.syment.n_sclass == C_FILE |
||
1380 | && c_symbol->native->u.syment.n_numaux > 0) |
||
1381 | { |
||
1382 | if (bfd_coff_force_symnames_in_strings (abfd)) |
||
1383 | { |
||
1384 | if (bfd_bwrite (".file", (bfd_size_type) 6, abfd) != 6) |
||
1385 | return FALSE; |
||
1386 | } |
||
1387 | maxlen = bfd_coff_filnmlen (abfd); |
||
1388 | } |
||
1389 | else |
||
1390 | maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN; |
||
1391 | |||
1392 | if (name_length > maxlen) |
||
1393 | { |
||
1394 | if (bfd_bwrite ((void *) (q->name), (bfd_size_type) name_length + 1, |
||
1395 | abfd) != name_length + 1) |
||
1396 | return FALSE; |
||
1397 | } |
||
1398 | } |
||
1399 | } |
||
1400 | else |
||
1401 | { |
||
1402 | /* We would normally not write anything here, but we'll write |
||
1403 | out 4 so that any stupid coff reader which tries to read the |
||
1404 | string table even when there isn't one won't croak. */ |
||
1405 | unsigned int size = STRING_SIZE_SIZE; |
||
1406 | bfd_byte buffer[STRING_SIZE_SIZE]; |
||
1407 | |||
1408 | #if STRING_SIZE_SIZE == 4 |
||
1409 | H_PUT_32 (abfd, size, buffer); |
||
1410 | #else |
||
1411 | #error Change H_PUT_32 |
||
1412 | #endif |
||
1413 | if (bfd_bwrite ((void *) buffer, (bfd_size_type) STRING_SIZE_SIZE, abfd) |
||
1414 | != STRING_SIZE_SIZE) |
||
1415 | return FALSE; |
||
1416 | } |
||
1417 | |||
1418 | /* Make sure the .debug section was created to be the correct size. |
||
1419 | We should create it ourselves on the fly, but we don't because |
||
1420 | BFD won't let us write to any section until we know how large all |
||
1421 | the sections are. We could still do it by making another pass |
||
1422 | over the symbols. FIXME. */ |
||
1423 | BFD_ASSERT (debug_string_size == 0 |
||
1424 | || (debug_string_section != (asection *) NULL |
||
1425 | && (BFD_ALIGN (debug_string_size, |
||
1426 | 1 << debug_string_section->alignment_power) |
||
1427 | == debug_string_section->size))); |
||
1428 | |||
1429 | return TRUE; |
||
1430 | } |
||
1431 | |||
1432 | bfd_boolean |
||
1433 | coff_write_linenumbers (bfd *abfd) |
||
1434 | { |
||
1435 | asection *s; |
||
1436 | bfd_size_type linesz; |
||
1437 | void * buff; |
||
1438 | |||
1439 | linesz = bfd_coff_linesz (abfd); |
||
1440 | buff = bfd_alloc (abfd, linesz); |
||
1441 | if (!buff) |
||
1442 | return FALSE; |
||
1443 | for (s = abfd->sections; s != (asection *) NULL; s = s->next) |
||
1444 | { |
||
1445 | if (s->lineno_count) |
||
1446 | { |
||
1447 | asymbol **q = abfd->outsymbols; |
||
1448 | if (bfd_seek (abfd, s->line_filepos, SEEK_SET) != 0) |
||
1449 | return FALSE; |
||
1450 | /* Find all the linenumbers in this section. */ |
||
1451 | while (*q) |
||
1452 | { |
||
1453 | asymbol *p = *q; |
||
1454 | if (p->section->output_section == s) |
||
1455 | { |
||
1456 | alent *l = |
||
1457 | BFD_SEND (bfd_asymbol_bfd (p), _get_lineno, |
||
1458 | (bfd_asymbol_bfd (p), p)); |
||
1459 | if (l) |
||
1460 | { |
||
1461 | /* Found a linenumber entry, output. */ |
||
1462 | struct internal_lineno out; |
||
1463 | memset ((void *) & out, 0, sizeof (out)); |
||
1464 | out.l_lnno = 0; |
||
1465 | out.l_addr.l_symndx = l->u.offset; |
||
1466 | bfd_coff_swap_lineno_out (abfd, &out, buff); |
||
1467 | if (bfd_bwrite (buff, (bfd_size_type) linesz, abfd) |
||
1468 | != linesz) |
||
1469 | return FALSE; |
||
1470 | l++; |
||
1471 | while (l->line_number) |
||
1472 | { |
||
1473 | out.l_lnno = l->line_number; |
||
1474 | out.l_addr.l_symndx = l->u.offset; |
||
1475 | bfd_coff_swap_lineno_out (abfd, &out, buff); |
||
1476 | if (bfd_bwrite (buff, (bfd_size_type) linesz, abfd) |
||
1477 | != linesz) |
||
1478 | return FALSE; |
||
1479 | l++; |
||
1480 | } |
||
1481 | } |
||
1482 | } |
||
1483 | q++; |
||
1484 | } |
||
1485 | } |
||
1486 | } |
||
1487 | bfd_release (abfd, buff); |
||
1488 | return TRUE; |
||
1489 | } |
||
1490 | |||
1491 | alent * |
||
1492 | coff_get_lineno (bfd *ignore_abfd ATTRIBUTE_UNUSED, asymbol *symbol) |
||
1493 | { |
||
1494 | return coffsymbol (symbol)->lineno; |
||
1495 | } |
||
1496 | |||
1497 | /* This function transforms the offsets into the symbol table into |
||
1498 | pointers to syments. */ |
||
1499 | |||
1500 | static void |
||
1501 | coff_pointerize_aux (bfd *abfd, |
||
1502 | combined_entry_type *table_base, |
||
1503 | combined_entry_type *symbol, |
||
1504 | unsigned int indaux, |
||
1505 | combined_entry_type *auxent) |
||
1506 | { |
||
1507 | unsigned int type = symbol->u.syment.n_type; |
||
1508 | unsigned int n_sclass = symbol->u.syment.n_sclass; |
||
1509 | |||
1510 | if (coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook) |
||
1511 | { |
||
1512 | if ((*coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook) |
||
1513 | (abfd, table_base, symbol, indaux, auxent)) |
||
1514 | return; |
||
1515 | } |
||
1516 | |||
1517 | /* Don't bother if this is a file or a section. */ |
||
1518 | if (n_sclass == C_STAT && type == T_NULL) |
||
1519 | return; |
||
1520 | if (n_sclass == C_FILE) |
||
1521 | return; |
||
1522 | |||
1523 | /* Otherwise patch up. */ |
||
1524 | #define N_TMASK coff_data (abfd)->local_n_tmask |
||
1525 | #define N_BTSHFT coff_data (abfd)->local_n_btshft |
||
1526 | |||
1527 | if ((ISFCN (type) || ISTAG (n_sclass) || n_sclass == C_BLOCK |
||
1528 | || n_sclass == C_FCN) |
||
1529 | && auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l > 0) |
||
1530 | { |
||
1531 | auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p = |
||
1532 | table_base + auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l; |
||
1533 | auxent->fix_end = 1; |
||
1534 | } |
||
1535 | /* A negative tagndx is meaningless, but the SCO 3.2v4 cc can |
||
1536 | generate one, so we must be careful to ignore it. */ |
||
1537 | if (auxent->u.auxent.x_sym.x_tagndx.l > 0) |
||
1538 | { |
||
1539 | auxent->u.auxent.x_sym.x_tagndx.p = |
||
1540 | table_base + auxent->u.auxent.x_sym.x_tagndx.l; |
||
1541 | auxent->fix_tag = 1; |
||
1542 | } |
||
1543 | } |
||
1544 | |||
1545 | /* Allocate space for the ".debug" section, and read it. |
||
1546 | We did not read the debug section until now, because |
||
1547 | we didn't want to go to the trouble until someone needed it. */ |
||
1548 | |||
1549 | static char * |
||
1550 | build_debug_section (bfd *abfd) |
||
1551 | { |
||
1552 | char *debug_section; |
||
1553 | file_ptr position; |
||
1554 | bfd_size_type sec_size; |
||
1555 | |||
1556 | asection *sect = bfd_get_section_by_name (abfd, ".debug"); |
||
1557 | |||
1558 | if (!sect) |
||
1559 | { |
||
1560 | bfd_set_error (bfd_error_no_debug_section); |
||
1561 | return NULL; |
||
1562 | } |
||
1563 | |||
1564 | sec_size = sect->size; |
||
1565 | debug_section = (char *) bfd_alloc (abfd, sec_size); |
||
1566 | if (debug_section == NULL) |
||
1567 | return NULL; |
||
1568 | |||
1569 | /* Seek to the beginning of the `.debug' section and read it. |
||
1570 | Save the current position first; it is needed by our caller. |
||
1571 | Then read debug section and reset the file pointer. */ |
||
1572 | |||
1573 | position = bfd_tell (abfd); |
||
1574 | if (bfd_seek (abfd, sect->filepos, SEEK_SET) != 0 |
||
1575 | || bfd_bread (debug_section, sec_size, abfd) != sec_size |
||
1576 | || bfd_seek (abfd, position, SEEK_SET) != 0) |
||
1577 | return NULL; |
||
1578 | return debug_section; |
||
1579 | } |
||
1580 | |||
1581 | /* Return a pointer to a malloc'd copy of 'name'. 'name' may not be |
||
1582 | \0-terminated, but will not exceed 'maxlen' characters. The copy *will* |
||
1583 | be \0-terminated. */ |
||
1584 | |||
1585 | static char * |
||
1586 | copy_name (bfd *abfd, char *name, size_t maxlen) |
||
1587 | { |
||
1588 | size_t len; |
||
1589 | char *newname; |
||
1590 | |||
1591 | for (len = 0; len < maxlen; ++len) |
||
1592 | if (name[len] == '\0') |
||
1593 | break; |
||
1594 | |||
1595 | if ((newname = (char *) bfd_alloc (abfd, (bfd_size_type) len + 1)) == NULL) |
||
1596 | return NULL; |
||
1597 | |||
1598 | strncpy (newname, name, len); |
||
1599 | newname[len] = '\0'; |
||
1600 | return newname; |
||
1601 | } |
||
1602 | |||
1603 | /* Read in the external symbols. */ |
||
1604 | |||
1605 | bfd_boolean |
||
1606 | _bfd_coff_get_external_symbols (bfd *abfd) |
||
1607 | { |
||
1608 | bfd_size_type symesz; |
||
1609 | bfd_size_type size; |
||
1610 | void * syms; |
||
1611 | |||
1612 | if (obj_coff_external_syms (abfd) != NULL) |
||
1613 | return TRUE; |
||
1614 | |||
1615 | symesz = bfd_coff_symesz (abfd); |
||
1616 | |||
1617 | size = obj_raw_syment_count (abfd) * symesz; |
||
1618 | if (size == 0) |
||
1619 | return TRUE; |
||
1620 | |||
1621 | syms = bfd_malloc (size); |
||
1622 | if (syms == NULL) |
||
1623 | return FALSE; |
||
1624 | |||
1625 | if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 |
||
1626 | || bfd_bread (syms, size, abfd) != size) |
||
1627 | { |
||
1628 | if (syms != NULL) |
||
1629 | free (syms); |
||
1630 | return FALSE; |
||
1631 | } |
||
1632 | |||
1633 | obj_coff_external_syms (abfd) = syms; |
||
1634 | |||
1635 | return TRUE; |
||
1636 | } |
||
1637 | |||
1638 | /* Read in the external strings. The strings are not loaded until |
||
1639 | they are needed. This is because we have no simple way of |
||
1640 | detecting a missing string table in an archive. */ |
||
1641 | |||
1642 | const char * |
||
1643 | _bfd_coff_read_string_table (bfd *abfd) |
||
1644 | { |
||
1645 | char extstrsize[STRING_SIZE_SIZE]; |
||
1646 | bfd_size_type strsize; |
||
1647 | char *strings; |
||
1648 | file_ptr pos; |
||
1649 | |||
1650 | if (obj_coff_strings (abfd) != NULL) |
||
1651 | return obj_coff_strings (abfd); |
||
1652 | |||
1653 | if (obj_sym_filepos (abfd) == 0) |
||
1654 | { |
||
1655 | bfd_set_error (bfd_error_no_symbols); |
||
1656 | return NULL; |
||
1657 | } |
||
1658 | |||
1659 | pos = obj_sym_filepos (abfd); |
||
1660 | pos += obj_raw_syment_count (abfd) * bfd_coff_symesz (abfd); |
||
1661 | if (bfd_seek (abfd, pos, SEEK_SET) != 0) |
||
1662 | return NULL; |
||
1663 | |||
1664 | if (bfd_bread (extstrsize, (bfd_size_type) sizeof extstrsize, abfd) |
||
1665 | != sizeof extstrsize) |
||
1666 | { |
||
1667 | if (bfd_get_error () != bfd_error_file_truncated) |
||
1668 | return NULL; |
||
1669 | |||
1670 | /* There is no string table. */ |
||
1671 | strsize = STRING_SIZE_SIZE; |
||
1672 | } |
||
1673 | else |
||
1674 | { |
||
1675 | #if STRING_SIZE_SIZE == 4 |
||
1676 | strsize = H_GET_32 (abfd, extstrsize); |
||
1677 | #else |
||
1678 | #error Change H_GET_32 |
||
1679 | #endif |
||
1680 | } |
||
1681 | |||
1682 | if (strsize < STRING_SIZE_SIZE) |
||
1683 | { |
||
1684 | (*_bfd_error_handler) |
||
1685 | (_("%B: bad string table size %lu"), abfd, (unsigned long) strsize); |
||
1686 | bfd_set_error (bfd_error_bad_value); |
||
1687 | return NULL; |
||
1688 | } |
||
1689 | |||
1690 | strings = (char *) bfd_malloc (strsize); |
||
1691 | if (strings == NULL) |
||
1692 | return NULL; |
||
1693 | |||
1694 | if (bfd_bread (strings + STRING_SIZE_SIZE, strsize - STRING_SIZE_SIZE, abfd) |
||
1695 | != strsize - STRING_SIZE_SIZE) |
||
1696 | { |
||
1697 | free (strings); |
||
1698 | return NULL; |
||
1699 | } |
||
1700 | |||
1701 | obj_coff_strings (abfd) = strings; |
||
1702 | |||
1703 | return strings; |
||
1704 | } |
||
1705 | |||
1706 | /* Free up the external symbols and strings read from a COFF file. */ |
||
1707 | |||
1708 | bfd_boolean |
||
1709 | _bfd_coff_free_symbols (bfd *abfd) |
||
1710 | { |
||
1711 | if (obj_coff_external_syms (abfd) != NULL |
||
1712 | && ! obj_coff_keep_syms (abfd)) |
||
1713 | { |
||
1714 | free (obj_coff_external_syms (abfd)); |
||
1715 | obj_coff_external_syms (abfd) = NULL; |
||
1716 | } |
||
1717 | if (obj_coff_strings (abfd) != NULL |
||
1718 | && ! obj_coff_keep_strings (abfd)) |
||
1719 | { |
||
1720 | free (obj_coff_strings (abfd)); |
||
1721 | obj_coff_strings (abfd) = NULL; |
||
1722 | } |
||
1723 | return TRUE; |
||
1724 | } |
||
1725 | |||
1726 | /* Read a symbol table into freshly bfd_allocated memory, swap it, and |
||
1727 | knit the symbol names into a normalized form. By normalized here I |
||
1728 | mean that all symbols have an n_offset pointer that points to a null- |
||
1729 | terminated string. */ |
||
1730 | |||
1731 | combined_entry_type * |
||
1732 | coff_get_normalized_symtab (bfd *abfd) |
||
1733 | { |
||
1734 | combined_entry_type *internal; |
||
1735 | combined_entry_type *internal_ptr; |
||
1736 | combined_entry_type *symbol_ptr; |
||
1737 | combined_entry_type *internal_end; |
||
1738 | size_t symesz; |
||
1739 | char *raw_src; |
||
1740 | char *raw_end; |
||
1741 | const char *string_table = NULL; |
||
1742 | char *debug_section = NULL; |
||
1743 | bfd_size_type size; |
||
1744 | |||
1745 | if (obj_raw_syments (abfd) != NULL) |
||
1746 | return obj_raw_syments (abfd); |
||
1747 | |||
1748 | size = obj_raw_syment_count (abfd) * sizeof (combined_entry_type); |
||
1749 | internal = (combined_entry_type *) bfd_zalloc (abfd, size); |
||
1750 | if (internal == NULL && size != 0) |
||
1751 | return NULL; |
||
1752 | internal_end = internal + obj_raw_syment_count (abfd); |
||
1753 | |||
1754 | if (! _bfd_coff_get_external_symbols (abfd)) |
||
1755 | return NULL; |
||
1756 | |||
1757 | raw_src = (char *) obj_coff_external_syms (abfd); |
||
1758 | |||
1759 | /* Mark the end of the symbols. */ |
||
1760 | symesz = bfd_coff_symesz (abfd); |
||
1761 | raw_end = (char *) raw_src + obj_raw_syment_count (abfd) * symesz; |
||
1762 | |||
1763 | /* FIXME SOMEDAY. A string table size of zero is very weird, but |
||
1764 | probably possible. If one shows up, it will probably kill us. */ |
||
1765 | |||
1766 | /* Swap all the raw entries. */ |
||
1767 | for (internal_ptr = internal; |
||
1768 | raw_src < raw_end; |
||
1769 | raw_src += symesz, internal_ptr++) |
||
1770 | { |
||
1771 | |||
1772 | unsigned int i; |
||
1773 | bfd_coff_swap_sym_in (abfd, (void *) raw_src, |
||
1774 | (void *) & internal_ptr->u.syment); |
||
1775 | symbol_ptr = internal_ptr; |
||
1776 | |||
1777 | for (i = 0; |
||
1778 | i < symbol_ptr->u.syment.n_numaux; |
||
1779 | i++) |
||
1780 | { |
||
1781 | internal_ptr++; |
||
1782 | raw_src += symesz; |
||
1783 | bfd_coff_swap_aux_in (abfd, (void *) raw_src, |
||
1784 | symbol_ptr->u.syment.n_type, |
||
1785 | symbol_ptr->u.syment.n_sclass, |
||
1786 | (int) i, symbol_ptr->u.syment.n_numaux, |
||
1787 | &(internal_ptr->u.auxent)); |
||
1788 | coff_pointerize_aux (abfd, internal, symbol_ptr, i, |
||
1789 | internal_ptr); |
||
1790 | } |
||
1791 | } |
||
1792 | |||
1793 | /* Free the raw symbols, but not the strings (if we have them). */ |
||
1794 | obj_coff_keep_strings (abfd) = TRUE; |
||
1795 | if (! _bfd_coff_free_symbols (abfd)) |
||
1796 | return NULL; |
||
1797 | |||
1798 | for (internal_ptr = internal; internal_ptr < internal_end; |
||
1799 | internal_ptr++) |
||
1800 | { |
||
1801 | if (internal_ptr->u.syment.n_sclass == C_FILE |
||
1802 | && internal_ptr->u.syment.n_numaux > 0) |
||
1803 | { |
||
1804 | /* Make a file symbol point to the name in the auxent, since |
||
1805 | the text ".file" is redundant. */ |
||
1806 | if ((internal_ptr + 1)->u.auxent.x_file.x_n.x_zeroes == 0) |
||
1807 | { |
||
1808 | /* The filename is a long one, point into the string table. */ |
||
1809 | if (string_table == NULL) |
||
1810 | { |
||
1811 | string_table = _bfd_coff_read_string_table (abfd); |
||
1812 | if (string_table == NULL) |
||
1813 | return NULL; |
||
1814 | } |
||
1815 | |||
1816 | internal_ptr->u.syment._n._n_n._n_offset = |
||
1817 | ((bfd_hostptr_t) |
||
1818 | (string_table |
||
1819 | + (internal_ptr + 1)->u.auxent.x_file.x_n.x_offset)); |
||
1820 | } |
||
1821 | else |
||
1822 | { |
||
1823 | /* Ordinary short filename, put into memory anyway. The |
||
1824 | Microsoft PE tools sometimes store a filename in |
||
1825 | multiple AUX entries. */ |
||
1826 | if (internal_ptr->u.syment.n_numaux > 1 |
||
1827 | && coff_data (abfd)->pe) |
||
1828 | internal_ptr->u.syment._n._n_n._n_offset = |
||
1829 | ((bfd_hostptr_t) |
||
1830 | copy_name (abfd, |
||
1831 | (internal_ptr + 1)->u.auxent.x_file.x_fname, |
||
1832 | internal_ptr->u.syment.n_numaux * symesz)); |
||
1833 | else |
||
1834 | internal_ptr->u.syment._n._n_n._n_offset = |
||
1835 | ((bfd_hostptr_t) |
||
1836 | copy_name (abfd, |
||
1837 | (internal_ptr + 1)->u.auxent.x_file.x_fname, |
||
1838 | (size_t) bfd_coff_filnmlen (abfd))); |
||
1839 | } |
||
1840 | } |
||
1841 | else |
||
1842 | { |
||
1843 | if (internal_ptr->u.syment._n._n_n._n_zeroes != 0) |
||
1844 | { |
||
1845 | /* This is a "short" name. Make it long. */ |
||
1846 | size_t i; |
||
1847 | char *newstring; |
||
1848 | |||
1849 | /* Find the length of this string without walking into memory |
||
1850 | that isn't ours. */ |
||
1851 | for (i = 0; i < 8; ++i) |
||
1852 | if (internal_ptr->u.syment._n._n_name[i] == '\0') |
||
1853 | break; |
||
1854 | |||
1855 | newstring = (char *) bfd_zalloc (abfd, (bfd_size_type) (i + 1)); |
||
1856 | if (newstring == NULL) |
||
1857 | return NULL; |
||
1858 | strncpy (newstring, internal_ptr->u.syment._n._n_name, i); |
||
1859 | internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) newstring; |
||
1860 | internal_ptr->u.syment._n._n_n._n_zeroes = 0; |
||
1861 | } |
||
1862 | else if (internal_ptr->u.syment._n._n_n._n_offset == 0) |
||
1863 | internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) ""; |
||
1864 | else if (!bfd_coff_symname_in_debug (abfd, &internal_ptr->u.syment)) |
||
1865 | { |
||
1866 | /* Long name already. Point symbol at the string in the |
||
1867 | table. */ |
||
1868 | if (string_table == NULL) |
||
1869 | { |
||
1870 | string_table = _bfd_coff_read_string_table (abfd); |
||
1871 | if (string_table == NULL) |
||
1872 | return NULL; |
||
1873 | } |
||
1874 | internal_ptr->u.syment._n._n_n._n_offset = |
||
1875 | ((bfd_hostptr_t) |
||
1876 | (string_table |
||
1877 | + internal_ptr->u.syment._n._n_n._n_offset)); |
||
1878 | } |
||
1879 | else |
||
1880 | { |
||
1881 | /* Long name in debug section. Very similar. */ |
||
1882 | if (debug_section == NULL) |
||
1883 | debug_section = build_debug_section (abfd); |
||
1884 | internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) |
||
1885 | (debug_section + internal_ptr->u.syment._n._n_n._n_offset); |
||
1886 | } |
||
1887 | } |
||
1888 | internal_ptr += internal_ptr->u.syment.n_numaux; |
||
1889 | } |
||
1890 | |||
1891 | obj_raw_syments (abfd) = internal; |
||
1892 | BFD_ASSERT (obj_raw_syment_count (abfd) |
||
1893 | == (unsigned int) (internal_ptr - internal)); |
||
1894 | |||
1895 | return internal; |
||
1896 | } |
||
1897 | |||
1898 | long |
||
1899 | coff_get_reloc_upper_bound (bfd *abfd, sec_ptr asect) |
||
1900 | { |
||
1901 | if (bfd_get_format (abfd) != bfd_object) |
||
1902 | { |
||
1903 | bfd_set_error (bfd_error_invalid_operation); |
||
1904 | return -1; |
||
1905 | } |
||
1906 | return (asect->reloc_count + 1) * sizeof (arelent *); |
||
1907 | } |
||
1908 | |||
1909 | asymbol * |
||
1910 | coff_make_empty_symbol (bfd *abfd) |
||
1911 | { |
||
1912 | bfd_size_type amt = sizeof (coff_symbol_type); |
||
1913 | coff_symbol_type *new_symbol = (coff_symbol_type *) bfd_zalloc (abfd, amt); |
||
1914 | |||
1915 | if (new_symbol == NULL) |
||
1916 | return NULL; |
||
1917 | new_symbol->symbol.section = 0; |
||
1918 | new_symbol->native = 0; |
||
1919 | new_symbol->lineno = NULL; |
||
1920 | new_symbol->done_lineno = FALSE; |
||
1921 | new_symbol->symbol.the_bfd = abfd; |
||
1922 | |||
1923 | return & new_symbol->symbol; |
||
1924 | } |
||
1925 | |||
1926 | /* Make a debugging symbol. */ |
||
1927 | |||
1928 | asymbol * |
||
1929 | coff_bfd_make_debug_symbol (bfd *abfd, |
||
1930 | void * ptr ATTRIBUTE_UNUSED, |
||
1931 | unsigned long sz ATTRIBUTE_UNUSED) |
||
1932 | { |
||
1933 | bfd_size_type amt = sizeof (coff_symbol_type); |
||
1934 | coff_symbol_type *new_symbol = (coff_symbol_type *) bfd_alloc (abfd, amt); |
||
1935 | |||
1936 | if (new_symbol == NULL) |
||
1937 | return NULL; |
||
1938 | /* @@ The 10 is a guess at a plausible maximum number of aux entries |
||
1939 | (but shouldn't be a constant). */ |
||
1940 | amt = sizeof (combined_entry_type) * 10; |
||
1941 | new_symbol->native = (combined_entry_type *) bfd_zalloc (abfd, amt); |
||
1942 | if (!new_symbol->native) |
||
1943 | return NULL; |
||
1944 | new_symbol->symbol.section = bfd_abs_section_ptr; |
||
1945 | new_symbol->symbol.flags = BSF_DEBUGGING; |
||
1946 | new_symbol->lineno = NULL; |
||
1947 | new_symbol->done_lineno = FALSE; |
||
1948 | new_symbol->symbol.the_bfd = abfd; |
||
1949 | |||
1950 | return & new_symbol->symbol; |
||
1951 | } |
||
1952 | |||
1953 | void |
||
1954 | coff_get_symbol_info (bfd *abfd, asymbol *symbol, symbol_info *ret) |
||
1955 | { |
||
1956 | bfd_symbol_info (symbol, ret); |
||
1957 | |||
1958 | if (coffsymbol (symbol)->native != NULL |
||
1959 | && coffsymbol (symbol)->native->fix_value) |
||
1960 | ret->value = coffsymbol (symbol)->native->u.syment.n_value - |
||
1961 | (bfd_hostptr_t) obj_raw_syments (abfd); |
||
1962 | } |
||
1963 | |||
1964 | /* Return the COFF syment for a symbol. */ |
||
1965 | |||
1966 | bfd_boolean |
||
1967 | bfd_coff_get_syment (bfd *abfd, |
||
1968 | asymbol *symbol, |
||
1969 | struct internal_syment *psyment) |
||
1970 | { |
||
1971 | coff_symbol_type *csym; |
||
1972 | |||
1973 | csym = coff_symbol_from (abfd, symbol); |
||
1974 | if (csym == NULL || csym->native == NULL) |
||
1975 | { |
||
1976 | bfd_set_error (bfd_error_invalid_operation); |
||
1977 | return FALSE; |
||
1978 | } |
||
1979 | |||
1980 | *psyment = csym->native->u.syment; |
||
1981 | |||
1982 | if (csym->native->fix_value) |
||
1983 | psyment->n_value = psyment->n_value - |
||
1984 | (bfd_hostptr_t) obj_raw_syments (abfd); |
||
1985 | |||
1986 | /* FIXME: We should handle fix_line here. */ |
||
1987 | |||
1988 | return TRUE; |
||
1989 | } |
||
1990 | |||
1991 | /* Return the COFF auxent for a symbol. */ |
||
1992 | |||
1993 | bfd_boolean |
||
1994 | bfd_coff_get_auxent (bfd *abfd, |
||
1995 | asymbol *symbol, |
||
1996 | int indx, |
||
1997 | union internal_auxent *pauxent) |
||
1998 | { |
||
1999 | coff_symbol_type *csym; |
||
2000 | combined_entry_type *ent; |
||
2001 | |||
2002 | csym = coff_symbol_from (abfd, symbol); |
||
2003 | |||
2004 | if (csym == NULL |
||
2005 | || csym->native == NULL |
||
2006 | || indx >= csym->native->u.syment.n_numaux) |
||
2007 | { |
||
2008 | bfd_set_error (bfd_error_invalid_operation); |
||
2009 | return FALSE; |
||
2010 | } |
||
2011 | |||
2012 | ent = csym->native + indx + 1; |
||
2013 | |||
2014 | *pauxent = ent->u.auxent; |
||
2015 | |||
2016 | if (ent->fix_tag) |
||
2017 | pauxent->x_sym.x_tagndx.l = |
||
2018 | ((combined_entry_type *) pauxent->x_sym.x_tagndx.p |
||
2019 | - obj_raw_syments (abfd)); |
||
2020 | |||
2021 | if (ent->fix_end) |
||
2022 | pauxent->x_sym.x_fcnary.x_fcn.x_endndx.l = |
||
2023 | ((combined_entry_type *) pauxent->x_sym.x_fcnary.x_fcn.x_endndx.p |
||
2024 | - obj_raw_syments (abfd)); |
||
2025 | |||
2026 | if (ent->fix_scnlen) |
||
2027 | pauxent->x_csect.x_scnlen.l = |
||
2028 | ((combined_entry_type *) pauxent->x_csect.x_scnlen.p |
||
2029 | - obj_raw_syments (abfd)); |
||
2030 | |||
2031 | return TRUE; |
||
2032 | } |
||
2033 | |||
2034 | /* Print out information about COFF symbol. */ |
||
2035 | |||
2036 | void |
||
2037 | coff_print_symbol (bfd *abfd, |
||
2038 | void * filep, |
||
2039 | asymbol *symbol, |
||
2040 | bfd_print_symbol_type how) |
||
2041 | { |
||
2042 | FILE * file = (FILE *) filep; |
||
2043 | |||
2044 | switch (how) |
||
2045 | { |
||
2046 | case bfd_print_symbol_name: |
||
2047 | fprintf (file, "%s", symbol->name); |
||
2048 | break; |
||
2049 | |||
2050 | case bfd_print_symbol_more: |
||
2051 | fprintf (file, "coff %s %s", |
||
2052 | coffsymbol (symbol)->native ? "n" : "g", |
||
2053 | coffsymbol (symbol)->lineno ? "l" : " "); |
||
2054 | break; |
||
2055 | |||
2056 | case bfd_print_symbol_all: |
||
2057 | if (coffsymbol (symbol)->native) |
||
2058 | { |
||
2059 | bfd_vma val; |
||
2060 | unsigned int aux; |
||
2061 | combined_entry_type *combined = coffsymbol (symbol)->native; |
||
2062 | combined_entry_type *root = obj_raw_syments (abfd); |
||
2063 | struct lineno_cache_entry *l = coffsymbol (symbol)->lineno; |
||
2064 | |||
2065 | fprintf (file, "[%3ld]", (long) (combined - root)); |
||
2066 | |||
2067 | if (! combined->fix_value) |
||
2068 | val = (bfd_vma) combined->u.syment.n_value; |
||
2069 | else |
||
2070 | val = combined->u.syment.n_value - (bfd_hostptr_t) root; |
||
2071 | |||
2072 | fprintf (file, "(sec %2d)(fl 0x%02x)(ty %3x)(scl %3d) (nx %d) 0x", |
||
2073 | combined->u.syment.n_scnum, |
||
2074 | combined->u.syment.n_flags, |
||
2075 | combined->u.syment.n_type, |
||
2076 | combined->u.syment.n_sclass, |
||
2077 | combined->u.syment.n_numaux); |
||
2078 | bfd_fprintf_vma (abfd, file, val); |
||
2079 | fprintf (file, " %s", symbol->name); |
||
2080 | |||
2081 | for (aux = 0; aux < combined->u.syment.n_numaux; aux++) |
||
2082 | { |
||
2083 | combined_entry_type *auxp = combined + aux + 1; |
||
2084 | long tagndx; |
||
2085 | |||
2086 | if (auxp->fix_tag) |
||
2087 | tagndx = auxp->u.auxent.x_sym.x_tagndx.p - root; |
||
2088 | else |
||
2089 | tagndx = auxp->u.auxent.x_sym.x_tagndx.l; |
||
2090 | |||
2091 | fprintf (file, "\n"); |
||
2092 | |||
2093 | if (bfd_coff_print_aux (abfd, file, root, combined, auxp, aux)) |
||
2094 | continue; |
||
2095 | |||
2096 | switch (combined->u.syment.n_sclass) |
||
2097 | { |
||
2098 | case C_FILE: |
||
2099 | fprintf (file, "File "); |
||
2100 | break; |
||
2101 | |||
2102 | case C_STAT: |
||
2103 | if (combined->u.syment.n_type == T_NULL) |
||
2104 | /* Probably a section symbol ? */ |
||
2105 | { |
||
2106 | fprintf (file, "AUX scnlen 0x%lx nreloc %d nlnno %d", |
||
2107 | (unsigned long) auxp->u.auxent.x_scn.x_scnlen, |
||
2108 | auxp->u.auxent.x_scn.x_nreloc, |
||
2109 | auxp->u.auxent.x_scn.x_nlinno); |
||
2110 | if (auxp->u.auxent.x_scn.x_checksum != 0 |
||
2111 | || auxp->u.auxent.x_scn.x_associated != 0 |
||
2112 | || auxp->u.auxent.x_scn.x_comdat != 0) |
||
2113 | fprintf (file, " checksum 0x%lx assoc %d comdat %d", |
||
2114 | auxp->u.auxent.x_scn.x_checksum, |
||
2115 | auxp->u.auxent.x_scn.x_associated, |
||
2116 | auxp->u.auxent.x_scn.x_comdat); |
||
2117 | break; |
||
2118 | } |
||
2119 | /* Otherwise fall through. */ |
||
2120 | case C_EXT: |
||
2121 | case C_AIX_WEAKEXT: |
||
2122 | if (ISFCN (combined->u.syment.n_type)) |
||
2123 | { |
||
2124 | long next, llnos; |
||
2125 | |||
2126 | if (auxp->fix_end) |
||
2127 | next = (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p |
||
2128 | - root); |
||
2129 | else |
||
2130 | next = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l; |
||
2131 | llnos = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_lnnoptr; |
||
2132 | fprintf (file, |
||
2133 | "AUX tagndx %ld ttlsiz 0x%lx lnnos %ld next %ld", |
||
2134 | tagndx, |
||
2135 | (unsigned long) auxp->u.auxent.x_sym.x_misc.x_fsize, |
||
2136 | llnos, next); |
||
2137 | break; |
||
2138 | } |
||
2139 | /* Otherwise fall through. */ |
||
2140 | default: |
||
2141 | fprintf (file, "AUX lnno %d size 0x%x tagndx %ld", |
||
2142 | auxp->u.auxent.x_sym.x_misc.x_lnsz.x_lnno, |
||
2143 | auxp->u.auxent.x_sym.x_misc.x_lnsz.x_size, |
||
2144 | tagndx); |
||
2145 | if (auxp->fix_end) |
||
2146 | fprintf (file, " endndx %ld", |
||
2147 | ((long) |
||
2148 | (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p |
||
2149 | - root))); |
||
2150 | break; |
||
2151 | } |
||
2152 | } |
||
2153 | |||
2154 | if (l) |
||
2155 | { |
||
2156 | fprintf (file, "\n%s :", l->u.sym->name); |
||
2157 | l++; |
||
2158 | while (l->line_number) |
||
2159 | { |
||
2160 | fprintf (file, "\n%4d : ", l->line_number); |
||
2161 | bfd_fprintf_vma (abfd, file, l->u.offset + symbol->section->vma); |
||
2162 | l++; |
||
2163 | } |
||
2164 | } |
||
2165 | } |
||
2166 | else |
||
2167 | { |
||
2168 | bfd_print_symbol_vandf (abfd, (void *) file, symbol); |
||
2169 | fprintf (file, " %-5s %s %s %s", |
||
2170 | symbol->section->name, |
||
2171 | coffsymbol (symbol)->native ? "n" : "g", |
||
2172 | coffsymbol (symbol)->lineno ? "l" : " ", |
||
2173 | symbol->name); |
||
2174 | } |
||
2175 | } |
||
2176 | } |
||
2177 | |||
2178 | /* Return whether a symbol name implies a local symbol. In COFF, |
||
2179 | local symbols generally start with ``.L''. Most targets use this |
||
2180 | function for the is_local_label_name entry point, but some may |
||
2181 | override it. */ |
||
2182 | |||
2183 | bfd_boolean |
||
2184 | _bfd_coff_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, |
||
2185 | const char *name) |
||
2186 | { |
||
2187 | return name[0] == '.' && name[1] == 'L'; |
||
2188 | } |
||
2189 | |||
2190 | /* Provided a BFD, a section and an offset (in bytes, not octets) into the |
||
2191 | section, calculate and return the name of the source file and the line |
||
2192 | nearest to the wanted location. */ |
||
2193 | |||
2194 | bfd_boolean |
||
2195 | coff_find_nearest_line_with_names (bfd *abfd, |
||
2196 | const struct dwarf_debug_section *debug_sections, |
||
2197 | asection *section, |
||
2198 | asymbol **symbols, |
||
2199 | bfd_vma offset, |
||
2200 | const char **filename_ptr, |
||
2201 | const char **functionname_ptr, |
||
2202 | unsigned int *line_ptr) |
||
2203 | { |
||
2204 | bfd_boolean found; |
||
2205 | unsigned int i; |
||
2206 | unsigned int line_base; |
||
2207 | coff_data_type *cof = coff_data (abfd); |
||
2208 | /* Run through the raw syments if available. */ |
||
2209 | combined_entry_type *p; |
||
2210 | combined_entry_type *pend; |
||
2211 | alent *l; |
||
2212 | struct coff_section_tdata *sec_data; |
||
2213 | bfd_size_type amt; |
||
2214 | |||
2215 | /* Before looking through the symbol table, try to use a .stab |
||
2216 | section to find the information. */ |
||
2217 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
||
2218 | &found, filename_ptr, |
||
2219 | functionname_ptr, line_ptr, |
||
2220 | &coff_data(abfd)->line_info)) |
||
2221 | return FALSE; |
||
2222 | |||
2223 | if (found) |
||
2224 | return TRUE; |
||
2225 | |||
2226 | /* Also try examining DWARF2 debugging information. */ |
||
2227 | if (_bfd_dwarf2_find_nearest_line (abfd, debug_sections, |
||
2228 | section, symbols, offset, |
||
2229 | filename_ptr, functionname_ptr, |
||
2230 | line_ptr, NULL, 0, |
||
2231 | &coff_data(abfd)->dwarf2_find_line_info)) |
||
2232 | return TRUE; |
||
2233 | |||
2234 | *filename_ptr = 0; |
||
2235 | *functionname_ptr = 0; |
||
2236 | *line_ptr = 0; |
||
2237 | |||
2238 | /* Don't try and find line numbers in a non coff file. */ |
||
2239 | if (!bfd_family_coff (abfd)) |
||
2240 | return FALSE; |
||
2241 | |||
2242 | if (cof == NULL) |
||
2243 | return FALSE; |
||
2244 | |||
2245 | /* Find the first C_FILE symbol. */ |
||
2246 | p = cof->raw_syments; |
||
2247 | if (!p) |
||
2248 | return FALSE; |
||
2249 | |||
2250 | pend = p + cof->raw_syment_count; |
||
2251 | while (p < pend) |
||
2252 | { |
||
2253 | if (p->u.syment.n_sclass == C_FILE) |
||
2254 | break; |
||
2255 | p += 1 + p->u.syment.n_numaux; |
||
2256 | } |
||
2257 | |||
2258 | if (p < pend) |
||
2259 | { |
||
2260 | bfd_vma sec_vma; |
||
2261 | bfd_vma maxdiff; |
||
2262 | |||
2263 | /* Look through the C_FILE symbols to find the best one. */ |
||
2264 | sec_vma = bfd_get_section_vma (abfd, section); |
||
2265 | *filename_ptr = (char *) p->u.syment._n._n_n._n_offset; |
||
2266 | maxdiff = (bfd_vma) 0 - (bfd_vma) 1; |
||
2267 | while (1) |
||
2268 | { |
||
2269 | bfd_vma file_addr; |
||
2270 | combined_entry_type *p2; |
||
2271 | |||
2272 | for (p2 = p + 1 + p->u.syment.n_numaux; |
||
2273 | p2 < pend; |
||
2274 | p2 += 1 + p2->u.syment.n_numaux) |
||
2275 | { |
||
2276 | if (p2->u.syment.n_scnum > 0 |
||
2277 | && (section |
||
2278 | == coff_section_from_bfd_index (abfd, |
||
2279 | p2->u.syment.n_scnum))) |
||
2280 | break; |
||
2281 | if (p2->u.syment.n_sclass == C_FILE) |
||
2282 | { |
||
2283 | p2 = pend; |
||
2284 | break; |
||
2285 | } |
||
2286 | } |
||
2287 | |||
2288 | file_addr = (bfd_vma) p2->u.syment.n_value; |
||
2289 | /* PR 11512: Include the section address of the function name symbol. */ |
||
2290 | if (p2->u.syment.n_scnum > 0) |
||
2291 | file_addr += coff_section_from_bfd_index (abfd, |
||
2292 | p2->u.syment.n_scnum)->vma; |
||
2293 | /* We use <= MAXDIFF here so that if we get a zero length |
||
2294 | file, we actually use the next file entry. */ |
||
2295 | if (p2 < pend |
||
2296 | && offset + sec_vma >= file_addr |
||
2297 | && offset + sec_vma - file_addr <= maxdiff) |
||
2298 | { |
||
2299 | *filename_ptr = (char *) p->u.syment._n._n_n._n_offset; |
||
2300 | maxdiff = offset + sec_vma - p2->u.syment.n_value; |
||
2301 | } |
||
2302 | |||
2303 | /* Avoid endless loops on erroneous files by ensuring that |
||
2304 | we always move forward in the file. */ |
||
2305 | if (p >= cof->raw_syments + p->u.syment.n_value) |
||
2306 | break; |
||
2307 | |||
2308 | p = cof->raw_syments + p->u.syment.n_value; |
||
2309 | if (p > pend || p->u.syment.n_sclass != C_FILE) |
||
2310 | break; |
||
2311 | } |
||
2312 | } |
||
2313 | |||
2314 | /* Now wander though the raw linenumbers of the section. */ |
||
2315 | /* If we have been called on this section before, and the offset we |
||
2316 | want is further down then we can prime the lookup loop. */ |
||
2317 | sec_data = coff_section_data (abfd, section); |
||
2318 | if (sec_data != NULL |
||
2319 | && sec_data->i > 0 |
||
2320 | && offset >= sec_data->offset) |
||
2321 | { |
||
2322 | i = sec_data->i; |
||
2323 | *functionname_ptr = sec_data->function; |
||
2324 | line_base = sec_data->line_base; |
||
2325 | } |
||
2326 | else |
||
2327 | { |
||
2328 | i = 0; |
||
2329 | line_base = 0; |
||
2330 | } |
||
2331 | |||
2332 | if (section->lineno != NULL) |
||
2333 | { |
||
2334 | bfd_vma last_value = 0; |
||
2335 | |||
2336 | l = §ion->lineno[i]; |
||
2337 | |||
2338 | for (; i < section->lineno_count; i++) |
||
2339 | { |
||
2340 | if (l->line_number == 0) |
||
2341 | { |
||
2342 | /* Get the symbol this line number points at. */ |
||
2343 | coff_symbol_type *coff = (coff_symbol_type *) (l->u.sym); |
||
2344 | if (coff->symbol.value > offset) |
||
2345 | break; |
||
2346 | *functionname_ptr = coff->symbol.name; |
||
2347 | last_value = coff->symbol.value; |
||
2348 | if (coff->native) |
||
2349 | { |
||
2350 | combined_entry_type *s = coff->native; |
||
2351 | s = s + 1 + s->u.syment.n_numaux; |
||
2352 | |||
2353 | /* In XCOFF a debugging symbol can follow the |
||
2354 | function symbol. */ |
||
2355 | if (s->u.syment.n_scnum == N_DEBUG) |
||
2356 | s = s + 1 + s->u.syment.n_numaux; |
||
2357 | |||
2358 | /* S should now point to the .bf of the function. */ |
||
2359 | if (s->u.syment.n_numaux) |
||
2360 | { |
||
2361 | /* The linenumber is stored in the auxent. */ |
||
2362 | union internal_auxent *a = &((s + 1)->u.auxent); |
||
2363 | line_base = a->x_sym.x_misc.x_lnsz.x_lnno; |
||
2364 | *line_ptr = line_base; |
||
2365 | } |
||
2366 | } |
||
2367 | } |
||
2368 | else |
||
2369 | { |
||
2370 | if (l->u.offset > offset) |
||
2371 | break; |
||
2372 | *line_ptr = l->line_number + line_base - 1; |
||
2373 | } |
||
2374 | l++; |
||
2375 | } |
||
2376 | |||
2377 | /* If we fell off the end of the loop, then assume that this |
||
2378 | symbol has no line number info. Otherwise, symbols with no |
||
2379 | line number info get reported with the line number of the |
||
2380 | last line of the last symbol which does have line number |
||
2381 | info. We use 0x100 as a slop to account for cases where the |
||
2382 | last line has executable code. */ |
||
2383 | if (i >= section->lineno_count |
||
2384 | && last_value != 0 |
||
2385 | && offset - last_value > 0x100) |
||
2386 | { |
||
2387 | *functionname_ptr = NULL; |
||
2388 | *line_ptr = 0; |
||
2389 | } |
||
2390 | } |
||
2391 | |||
2392 | /* Cache the results for the next call. */ |
||
2393 | if (sec_data == NULL && section->owner == abfd) |
||
2394 | { |
||
2395 | amt = sizeof (struct coff_section_tdata); |
||
2396 | section->used_by_bfd = bfd_zalloc (abfd, amt); |
||
2397 | sec_data = (struct coff_section_tdata *) section->used_by_bfd; |
||
2398 | } |
||
2399 | if (sec_data != NULL) |
||
2400 | { |
||
2401 | sec_data->offset = offset; |
||
2402 | sec_data->i = i - 1; |
||
2403 | sec_data->function = *functionname_ptr; |
||
2404 | sec_data->line_base = line_base; |
||
2405 | } |
||
2406 | |||
2407 | return TRUE; |
||
2408 | } |
||
2409 | |||
2410 | bfd_boolean |
||
2411 | coff_find_nearest_line (bfd *abfd, |
||
2412 | asection *section, |
||
2413 | asymbol **symbols, |
||
2414 | bfd_vma offset, |
||
2415 | const char **filename_ptr, |
||
2416 | const char **functionname_ptr, |
||
2417 | unsigned int *line_ptr) |
||
2418 | { |
||
2419 | return coff_find_nearest_line_with_names (abfd, dwarf_debug_sections, |
||
2420 | section, symbols, offset, |
||
2421 | filename_ptr, functionname_ptr, |
||
2422 | line_ptr); |
||
2423 | } |
||
2424 | |||
2425 | bfd_boolean |
||
2426 | coff_find_nearest_line_discriminator (bfd *abfd, |
||
2427 | asection *section, |
||
2428 | asymbol **symbols, |
||
2429 | bfd_vma offset, |
||
2430 | const char **filename_ptr, |
||
2431 | const char **functionname_ptr, |
||
2432 | unsigned int *line_ptr, |
||
2433 | unsigned int *discriminator) |
||
2434 | { |
||
2435 | *discriminator = 0; |
||
2436 | return coff_find_nearest_line_with_names (abfd, dwarf_debug_sections, |
||
2437 | section, symbols, offset, |
||
2438 | filename_ptr, functionname_ptr, |
||
2439 | line_ptr); |
||
2440 | } |
||
2441 | |||
2442 | |||
2443 | bfd_boolean |
||
2444 | coff_find_inliner_info (bfd *abfd, |
||
2445 | const char **filename_ptr, |
||
2446 | const char **functionname_ptr, |
||
2447 | unsigned int *line_ptr) |
||
2448 | { |
||
2449 | bfd_boolean found; |
||
2450 | |||
2451 | found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr, |
||
2452 | functionname_ptr, line_ptr, |
||
2453 | &coff_data(abfd)->dwarf2_find_line_info); |
||
2454 | return (found); |
||
2455 | } |
||
2456 | |||
2457 | int |
||
2458 | coff_sizeof_headers (bfd *abfd, struct bfd_link_info *info) |
||
2459 | { |
||
2460 | size_t size; |
||
2461 | |||
2462 | if (!info->relocatable) |
||
2463 | size = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd); |
||
2464 | else |
||
2465 | size = bfd_coff_filhsz (abfd); |
||
2466 | |||
2467 | size += abfd->section_count * bfd_coff_scnhsz (abfd); |
||
2468 | return size; |
||
2469 | } |
||
2470 | |||
2471 | /* Change the class of a coff symbol held by BFD. */ |
||
2472 | |||
2473 | bfd_boolean |
||
2474 | bfd_coff_set_symbol_class (bfd * abfd, |
||
2475 | asymbol * symbol, |
||
2476 | unsigned int symbol_class) |
||
2477 | { |
||
2478 | coff_symbol_type * csym; |
||
2479 | |||
2480 | csym = coff_symbol_from (abfd, symbol); |
||
2481 | if (csym == NULL) |
||
2482 | { |
||
2483 | bfd_set_error (bfd_error_invalid_operation); |
||
2484 | return FALSE; |
||
2485 | } |
||
2486 | else if (csym->native == NULL) |
||
2487 | { |
||
2488 | /* This is an alien symbol which no native coff backend data. |
||
2489 | We cheat here by creating a fake native entry for it and |
||
2490 | then filling in the class. This code is based on that in |
||
2491 | coff_write_alien_symbol(). */ |
||
2492 | |||
2493 | combined_entry_type * native; |
||
2494 | bfd_size_type amt = sizeof (* native); |
||
2495 | |||
2496 | native = (combined_entry_type *) bfd_zalloc (abfd, amt); |
||
2497 | if (native == NULL) |
||
2498 | return FALSE; |
||
2499 | |||
2500 | native->u.syment.n_type = T_NULL; |
||
2501 | native->u.syment.n_sclass = symbol_class; |
||
2502 | |||
2503 | if (bfd_is_und_section (symbol->section)) |
||
2504 | { |
||
2505 | native->u.syment.n_scnum = N_UNDEF; |
||
2506 | native->u.syment.n_value = symbol->value; |
||
2507 | } |
||
2508 | else if (bfd_is_com_section (symbol->section)) |
||
2509 | { |
||
2510 | native->u.syment.n_scnum = N_UNDEF; |
||
2511 | native->u.syment.n_value = symbol->value; |
||
2512 | } |
||
2513 | else |
||
2514 | { |
||
2515 | native->u.syment.n_scnum = |
||
2516 | symbol->section->output_section->target_index; |
||
2517 | native->u.syment.n_value = (symbol->value |
||
2518 | + symbol->section->output_offset); |
||
2519 | if (! obj_pe (abfd)) |
||
2520 | native->u.syment.n_value += symbol->section->output_section->vma; |
||
2521 | |||
2522 | /* Copy the any flags from the file header into the symbol. |
||
2523 | FIXME: Why? */ |
||
2524 | native->u.syment.n_flags = bfd_asymbol_bfd (& csym->symbol)->flags; |
||
2525 | } |
||
2526 | |||
2527 | csym->native = native; |
||
2528 | } |
||
2529 | else |
||
2530 | csym->native->u.syment.n_sclass = symbol_class; |
||
2531 | |||
2532 | return TRUE; |
||
2533 | } |
||
2534 | |||
2535 | struct coff_comdat_info * |
||
2536 | bfd_coff_get_comdat_section (bfd *abfd, struct bfd_section *sec) |
||
2537 | { |
||
2538 | if (bfd_get_flavour (abfd) == bfd_target_coff_flavour |
||
2539 | && coff_section_data (abfd, sec) != NULL) |
||
2540 | return coff_section_data (abfd, sec)->comdat; |
||
2541 | else |
||
2542 | return NULL; |
||
2543 | } |
||
2544 | |||
2545 | bfd_boolean |
||
2546 | _bfd_coff_section_already_linked (bfd *abfd, |
||
2547 | asection *sec, |
||
2548 | struct bfd_link_info *info) |
||
2549 | { |
||
2550 | flagword flags; |
||
2551 | const char *name, *key; |
||
2552 | struct bfd_section_already_linked *l; |
||
2553 | struct bfd_section_already_linked_hash_entry *already_linked_list; |
||
2554 | struct coff_comdat_info *s_comdat; |
||
2555 | |||
2556 | flags = sec->flags; |
||
2557 | if ((flags & SEC_LINK_ONCE) == 0) |
||
2558 | return FALSE; |
||
2559 | |||
2560 | /* The COFF backend linker doesn't support group sections. */ |
||
2561 | if ((flags & SEC_GROUP) != 0) |
||
2562 | return FALSE; |
||
2563 | |||
2564 | name = bfd_get_section_name (abfd, sec); |
||
2565 | s_comdat = bfd_coff_get_comdat_section (abfd, sec); |
||
2566 | |||
2567 | if (s_comdat != NULL) |
||
2568 | key = s_comdat->name; |
||
2569 | else |
||
2570 | { |
||
2571 | if (CONST_STRNEQ (name, ".gnu.linkonce.") |
||
2572 | && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
||
2573 | key++; |
||
2574 | else |
||
2575 | /* FIXME: gcc as of 2011-09 emits sections like .text$ |
||
2576 | .xdata$ |
||
2577 | comdat key. Should these all match the LTO IR key? */ |
||
2578 | key = name; |
||
2579 | } |
||
2580 | |||
2581 | already_linked_list = bfd_section_already_linked_table_lookup (key); |
||
2582 | |||
2583 | for (l = already_linked_list->entry; l != NULL; l = l->next) |
||
2584 | { |
||
2585 | struct coff_comdat_info *l_comdat; |
||
2586 | |||
2587 | l_comdat = bfd_coff_get_comdat_section (l->sec->owner, l->sec); |
||
2588 | |||
2589 | /* The section names must match, and both sections must be |
||
2590 | comdat and have the same comdat name, or both sections must |
||
2591 | be non-comdat. LTO IR plugin sections are an exception. They |
||
2592 | are always named .gnu.linkonce.t. |
||
2593 | and match any comdat section with comdat name of |
||
2594 | any linkonce section with the same suffix, ie. |
||
2595 | .gnu.linkonce.*. |
||
2596 | if (((s_comdat != NULL) == (l_comdat != NULL) |
||
2597 | && strcmp (name, l->sec->name) == 0) |
||
2598 | || (l->sec->owner->flags & BFD_PLUGIN) != 0) |
||
2599 | { |
||
2600 | /* The section has already been linked. See if we should |
||
2601 | issue a warning. */ |
||
2602 | return _bfd_handle_already_linked (sec, l, info); |
||
2603 | } |
||
2604 | } |
||
2605 | |||
2606 | /* This is the first section with this name. Record it. */ |
||
2607 | if (!bfd_section_already_linked_table_insert (already_linked_list, sec)) |
||
2608 | info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
||
2609 | return FALSE; |
||
2610 | }>=>>=>>>>>>>>>>>><>>>>=>=>>>>>>>>>>> |