gold/defstd.cc

   1 // defstd.cc -- define standard symbols for gold.
   2
   3 #include "gold.h"
   4
   5 #include "symtab.h"
   6 #include "defstd.h"
   7
   8 // This is a simple file which defines the standard symbols like
   9 // "_end".
  10
  11 namespace
  12 {
  13
  14 using namespace gold;
  15
  16 const Define_symbol_in_section in_section[] =
  17 {
  18   {
  19     "__preinit_array_start",    // name
  20     ".preinit_array",           // output_section
  21     0,                          // value
  22     0,                          // size
  23     elfcpp::STT_NOTYPE,         // type
  24     elfcpp::STB_GLOBAL,         // binding
  25     elfcpp::STV_HIDDEN,         // visibility
  26     0,                          // nonvis
  27     false,                      // offset_is_from_end
  28     true                        // only_if_ref
  29   },
  30   {
  31     "__preinit_array_end",      // name
  32     ".preinit_array",           // output_section
  33     0,                          // value
  34     0,                          // size
  35     elfcpp::STT_NOTYPE,         // type
  36     elfcpp::STB_GLOBAL,         // binding
  37     elfcpp::STV_HIDDEN,         // visibility
  38     0,                          // nonvis
  39     true,                       // offset_is_from_end
  40     true                        // only_if_ref
  41   },
  42   {
  43     "__init_array_start",       // name
  44     ".init_array",              // output_section
  45     0,                          // value
  46     0,                          // size
  47     elfcpp::STT_NOTYPE,         // type
  48     elfcpp::STB_GLOBAL,         // binding
  49     elfcpp::STV_HIDDEN,         // visibility
  50     0,                          // nonvis
  51     false,                      // offset_is_from_end
  52     true                        // only_if_ref
  53   },
  54   {
  55     "__init_array_end",         // name
  56     ".init_array",              // output_section
  57     0,                          // value
  58     0,                          // size
  59     elfcpp::STT_NOTYPE,         // type
  60     elfcpp::STB_GLOBAL,         // binding
  61     elfcpp::STV_HIDDEN,         // visibility
  62     0,                          // nonvis
  63     true,                       // offset_is_from_end
  64     true                        // only_if_ref
  65   },
  66   {
  67     "__fini_array_start",       // name
  68     ".fini_array",              // output_section
  69     0,                          // value
  70     0,                          // size
  71     elfcpp::STT_NOTYPE,         // type
  72     elfcpp::STB_GLOBAL,         // binding
  73     elfcpp::STV_HIDDEN,         // visibility
  74     0,                          // nonvis
  75     false,                      // offset_is_from_end
  76     true                        // only_if_ref
  77   },
  78   {
  79     "__fini_array_end",         // name
  80     ".fini_array",              // output_section
  81     0,                          // value
  82     0,                          // size
  83     elfcpp::STT_NOTYPE,         // type
  84     elfcpp::STB_GLOBAL,         // binding
  85     elfcpp::STV_HIDDEN,         // visibility
  86     0,                          // nonvis
  87     true,                       // offset_is_from_end
  88     true                        // only_if_ref
  89   }
  90 };
  91
  92 const int in_section_count = sizeof in_section / sizeof in_section[0];
  93
  94 const Define_symbol_in_segment in_segment[] =
  95 {
  96   {
  97     "__executable_start",       // name
  98     elfcpp::PT_LOAD,            // segment_type
  99     elfcpp::PF(0),              // segment_flags_set
 100     elfcpp::PF(0),              // segment_flags_clear
 101     0,                          // value
 102     0,                          // size
 103     elfcpp::STT_NOTYPE,         // type
 104     elfcpp::STB_GLOBAL,         // binding
 105     elfcpp::STV_DEFAULT,        // visibility
 106     0,                          // nonvis
 107     Symbol::SEGMENT_START,      // offset_from_base
 108     true                        // only_if_ref
 109   },
 110   {
 111     "etext",                    // name
 112     elfcpp::PT_LOAD,            // segment_type
 113     elfcpp::PF_X,               // segment_flags_set
 114     elfcpp::PF_W,               // segment_flags_clear
 115     0,                          // value
 116     0,                          // size
 117     elfcpp::STT_NOTYPE,         // type
 118     elfcpp::STB_GLOBAL,         // binding
 119     elfcpp::STV_DEFAULT,        // visibility
 120     0,                          // nonvis
 121     Symbol::SEGMENT_END,        // offset_from_base
 122     true                        // only_if_ref
 123   },
 124   {
 125     "_etext",                   // name
 126     elfcpp::PT_LOAD,            // segment_type
 127     elfcpp::PF_X,               // segment_flags_set
 128     elfcpp::PF_W,               // segment_flags_clear
 129     0,                          // value
 130     0,                          // size
 131     elfcpp::STT_NOTYPE,         // type
 132     elfcpp::STB_GLOBAL,         // binding
 133     elfcpp::STV_DEFAULT,        // visibility
 134     0,                          // nonvis
 135     Symbol::SEGMENT_END,        // offset_from_base
 136     true                        // only_if_ref
 137   },
 138   {
 139     "__etext",                  // name
 140     elfcpp::PT_LOAD,            // segment_type
 141     elfcpp::PF_X,               // segment_flags_set
 142     elfcpp::PF_W,               // segment_flags_clear
 143     0,                          // value
 144     0,                          // size
 145     elfcpp::STT_NOTYPE,         // type
 146     elfcpp::STB_GLOBAL,         // binding
 147     elfcpp::STV_DEFAULT,        // visibility
 148     0,                          // nonvis
 149     Symbol::SEGMENT_END,        // offset_from_base
 150     true                        // only_if_ref
 151   },
 152   {
 153     "_edata",                   // name
 154     elfcpp::PT_LOAD,            // segment_type
 155     elfcpp::PF_W,               // segment_flags_set
 156     elfcpp::PF(0),              // segment_flags_clear
 157     0,                          // value
 158     0,                          // size
 159     elfcpp::STT_NOTYPE,         // type
 160     elfcpp::STB_GLOBAL,         // binding
 161     elfcpp::STV_DEFAULT,        // visibility
 162     0,                          // nonvis
 163     Symbol::SEGMENT_BSS,        // offset_from_base
 164     false                       // only_if_ref
 165   },
 166   {
 167     "edata",                    // name
 168     elfcpp::PT_LOAD,            // segment_type
 169     elfcpp::PF_W,               // segment_flags_set
 170     elfcpp::PF(0),              // segment_flags_clear
 171     0,                          // value
 172     0,                          // size
 173     elfcpp::STT_NOTYPE,         // type
 174     elfcpp::STB_GLOBAL,         // binding
 175     elfcpp::STV_DEFAULT,        // visibility
 176     0,                          // nonvis
 177     Symbol::SEGMENT_BSS,        // offset_from_base
 178     true                        // only_if_ref
 179   },
 180   {
 181     "__bss_start",              // name
 182     elfcpp::PT_LOAD,            // segment_type
 183     elfcpp::PF_W,               // segment_flags_set
 184     elfcpp::PF(0),              // segment_flags_clear
 185     0,                          // value
 186     0,                          // size
 187     elfcpp::STT_NOTYPE,         // type
 188     elfcpp::STB_GLOBAL,         // binding
 189     elfcpp::STV_DEFAULT,        // visibility
 190     0,                          // nonvis
 191     Symbol::SEGMENT_BSS,        // offset_from_base
 192     false                       // only_if_ref
 193   },
 194   {
 195     "_end",                     // name
 196     elfcpp::PT_LOAD,            // segment_type
 197     elfcpp::PF_W,               // segment_flags_set
 198     elfcpp::PF(0),              // segment_flags_clear
 199     0,                          // value
 200     0,                          // size
 201     elfcpp::STT_NOTYPE,         // type
 202     elfcpp::STB_GLOBAL,         // binding
 203     elfcpp::STV_DEFAULT,        // visibility
 204     0,                          // nonvis
 205     Symbol::SEGMENT_END,        // offset_from_base
 206     false                       // only_if_ref
 207   },
 208   {
 209     "end",                      // name
 210     elfcpp::PT_LOAD,            // segment_type
 211     elfcpp::PF_W,               // segment_flags_set
 212     elfcpp::PF(0),              // segment_flags_clear
 213     0,                          // value
 214     0,                          // size
 215     elfcpp::STT_NOTYPE,         // type
 216     elfcpp::STB_GLOBAL,         // binding
 217     elfcpp::STV_DEFAULT,        // visibility
 218     0,                          // nonvis
 219     Symbol::SEGMENT_END,        // offset_from_base
 220     false                       // only_if_ref
 221   }
 222 };
 223
 224 const int in_segment_count = sizeof in_segment / sizeof in_segment[0];
 225
 226 } // End anonymous namespace.
 227
 228 namespace gold
 229 {
 230
 231 void
 232 define_standard_symbols(Symbol_table* symtab, const Layout* layout,
 233                         Target* target)
 234 {
 235   symtab->define_symbols(layout, target, in_section_count, in_section);
 236   symtab->define_symbols(layout, target, in_segment_count, in_segment);
 237 }
 238
 239 } // End namespace gold.