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55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
// justsyms_1.cc -- test --just-symbols for gold
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// Copyright (C) 2008-2022 Free Software Foundation, Inc.
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// Written by Ian Lance Taylor <iant@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 Linux kernel builds an object file using a linker script, and
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// then links against that object file using the -R option. This is a
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// test for that usage.
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#include <cassert>
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#include <csignal>
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#include <cstddef>
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#include <cstdlib>
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#include <stdint.h>
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extern char justsyms_string[];
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// We expect to get a SIGSEGV.
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static void
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handle_sigsegv(int)
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{
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exit(0);
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}
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int
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main(int, char**)
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{
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// The linker script should arrange for this symbol to be exactly at
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// address 0x10000.
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assert(reinterpret_cast<uintptr_t>(justsyms_string) == 0x100);
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// However, since the file was linked with --just-symbols, we should
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// not be able to actually access the symbol.
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signal(SIGSEGV, handle_sigsegv);
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char c = justsyms_string[0];
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exit(c == '\0' ? 1 : c);
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}
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