// defstd.cc -- define standard symbols for gold.
// Copyright (C) 2006-2020 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.
#include "gold.h"
#include "symtab.h"
#include "layout.h"
#include "defstd.h"
// This is a simple file which defines the standard symbols like
// "_end".
namespace
{
using namespace gold;
const Define_symbol_in_section in_section[] =
{
{
"__preinit_array_start", // name
".preinit_array", // output_section
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_HIDDEN, // visibility
0, // nonvis
false, // offset_is_from_end
true // only_if_ref
},
{
"__preinit_array_end", // name
".preinit_array", // output_section
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_HIDDEN, // visibility
0, // nonvis
true, // offset_is_from_end
true // only_if_ref
},
{
"__init_array_start", // name
".init_array", // output_section
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_HIDDEN, // visibility
0, // nonvis
false, // offset_is_from_end
true // only_if_ref
},
{
"__init_array_end", // name
".init_array", // output_section
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_HIDDEN, // visibility
0, // nonvis
true, // offset_is_from_end
true // only_if_ref
},
{
"__fini_array_start", // name
".fini_array", // output_section
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_HIDDEN, // visibility
0, // nonvis
false, // offset_is_from_end
true // only_if_ref
},
{
"__fini_array_end", // name
".fini_array", // output_section
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_HIDDEN, // visibility
0, // nonvis
true, // offset_is_from_end
true // only_if_ref
},
{
"__stack", // name
".stack", // output_section
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_DEFAULT, // visibility
0, // nonvis
false, // offset_is_from_end
true // only_if_ref
},
};
const int in_section_count = sizeof in_section / sizeof in_section[0];
const Define_symbol_in_segment in_segment[] =
{
{
"__executable_start", // name
elfcpp::PT_LOAD, // segment_type
elfcpp::PF(0), // segment_flags_set
elfcpp::PF(0), // segment_flags_clear
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_DEFAULT, // visibility
0, // nonvis
Symbol::SEGMENT_START, // offset_from_base
true // only_if_ref
},
{
"__ehdr_start", // name
elfcpp::PT_LOAD, // segment_type
elfcpp::PF(0), // segment_flags_set
elfcpp::PF(0), // segment_flags_clear
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_HIDDEN, // visibility
0, // nonvis
Symbol::SEGMENT_START, // offset_from_base
true // only_if_ref
},
{
"etext", // name
elfcpp::PT_LOAD, // segment_type
elfcpp::PF_X, // segment_flags_set
elfcpp::PF_W, // segment_flags_clear
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_DEFAULT, // visibility
0, // nonvis
Symbol::SEGMENT_END, // offset_from_base
true // only_if_ref
},
{
"_etext", // name
elfcpp::PT_LOAD, // segment_type
elfcpp::PF_X, // segment_flags_set
elfcpp::PF_W, // segment_flags_clear
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_DEFAULT, // visibility
0, // nonvis
Symbol::SEGMENT_END, // offset_from_base
true // only_if_ref
},
{
"__etext", // name
elfcpp::PT_LOAD, // segment_type
elfcpp::PF_X, // segment_flags_set
elfcpp::PF_W, // segment_flags_clear
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_DEFAULT, // visibility
0, // nonvis
Symbol::SEGMENT_END, // offset_from_base
true // only_if_ref
},
{
"_edata", // name
elfcpp::PT_LOAD, // segment_type
elfcpp::PF_W, // segment_flags_set
elfcpp::PF(0), // segment_flags_clear
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_DEFAULT, // visibility
0, // nonvis
Symbol::SEGMENT_BSS, // offset_from_base
false // only_if_ref
},
{
"edata", // name
elfcpp::PT_LOAD, // segment_type
elfcpp::PF_W, // segment_flags_set
elfcpp::PF(0), // segment_flags_clear
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_DEFAULT, // visibility
0, // nonvis
Symbol::SEGMENT_BSS, // offset_from_base
true // only_if_ref
},
{
"__bss_start", // name
elfcpp::PT_LOAD, // segment_type
elfcpp::PF_W, // segment_flags_set
elfcpp::PF(0), // segment_flags_clear
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_DEFAULT, // visibility
0, // nonvis
Symbol::SEGMENT_BSS, // offset_from_base
false // only_if_ref
},
{
"_end", // name
elfcpp::PT_LOAD, // segment_type
elfcpp::PF_W, // segment_flags_set
elfcpp::PF(0), // segment_flags_clear
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_DEFAULT, // visibility
0, // nonvis
Symbol::SEGMENT_END, // offset_from_base
false // only_if_ref
},
{
"end", // name
elfcpp::PT_LOAD, // segment_type
elfcpp::PF_W, // segment_flags_set
elfcpp::PF(0), // segment_flags_clear
0, // value
0, // size
elfcpp::STT_NOTYPE, // type
elfcpp::STB_GLOBAL, // binding
elfcpp::STV_DEFAULT, // visibility
0, // nonvis
Symbol::SEGMENT_END, // offset_from_base
true // only_if_ref
}
};
const int in_segment_count = sizeof in_segment / sizeof in_segment[0];
} // End anonymous namespace.
namespace gold
{
void
define_standard_symbols(Symbol_table* symtab, const Layout* layout)
{
bool saw_sections_clause = layout->script_options()->saw_sections_clause();
symtab->define_symbols(layout, in_section_count, in_section,
saw_sections_clause);
symtab->define_symbols(layout, in_segment_count, in_segment,
saw_sections_clause);
}
} // End namespace gold.