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d1bddd3c4b
2014-05-02 Cary Coutant <ccoutant@google.com> * defstd.cc (in_segment): Define __ehdr_start here... * layout.cc (Layout::finalize): ...Instead of here. Set the output segment when known. * resolve.cc (Symbol::override_base_with_special): Remember the original binding. * symtab.cc (Symbol::set_output_segment): New function. (Symbol::set_undefined): New function. * symtab.h (Symbol::is_weak_undefined): Check original undef binding. (Symbol::is_strong_undefined): New function. (Symbol::set_output_segment): New function. (Symbol::set_undefined): New function. * target-reloc.h (is_strong_undefined): Remove. (issue_undefined_symbol_error): Call Symbol::is_weak_undefined. Check for hidden undefs. (relocate_section): Call Symbol::is_strong_undefined. * testsuite/Makefile.am (ehdr_start_test_1) (ehdr_start_test_2, ehdr_start_test_3) (ehdr_start_test_4, ehdr_start_test_5): New test cases. * testsuite/Makefile.in: Regenerate. * testsuite/ehdr_start_def.cc: New source file. * testsuite/ehdr_start_test.cc: New source file. * testsuite/ehdr_start_test.t: New linker script. * testsuite/ehdr_start_test_4.sh: New shell script.
68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
// ehdr_start_test.cc -- test for __ehdr_start linker-defined symbol.
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// Copyright (C) 2014 Free Software Foundation, Inc.
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// Written by Cary Coutant <ccoutant@google.com>.
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// This file is part of gold.
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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// MA 02110-1301, USA.
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// The goal of this program is to produce as many different types of
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// relocations as we can in a stand-alone program that does not use
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// TLS. This program is compiled without optimization.
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#include "config.h"
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#include <cassert>
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#include <cstdio>
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#include "elfcpp.h"
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#ifdef EHDR_START_WEAK
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#define WEAK_ATTR __attribute__ ((weak))
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#else
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#define WEAK_ATTR
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#endif
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extern char __ehdr_start[] WEAK_ATTR;
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int
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main() {
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printf("&__ehdr_start = %p\n", &__ehdr_start);
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#ifdef EHDR_START_UNDEF
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assert(&__ehdr_start == 0);
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#else
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assert(&__ehdr_start != NULL);
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printf("ELF header: \\x%02x%c%c%c\n", __ehdr_start[0], __ehdr_start[1],
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__ehdr_start[2], __ehdr_start[3]);
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#ifdef EHDR_START_USER_DEF
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assert(__ehdr_start[0] == 'a'
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&& __ehdr_start[1] == 'b'
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&& __ehdr_start[2] == 'c'
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&& __ehdr_start[3] == 'd');
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#else
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assert(__ehdr_start[elfcpp::EI_MAG0] == elfcpp::ELFMAG0
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&& __ehdr_start[elfcpp::EI_MAG1] == elfcpp::ELFMAG1
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&& __ehdr_start[elfcpp::EI_MAG2] == elfcpp::ELFMAG2
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&& __ehdr_start[elfcpp::EI_MAG3] == elfcpp::ELFMAG3);
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#endif
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#endif
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return 0;
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}
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