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77 lines
2.0 KiB
C++
77 lines
2.0 KiB
C++
// copy_test_relro.cc -- test copy relocs against read-only and relro symbols.
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// Copyright (C) 2016-2020 Free Software Foundation, Inc.
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// Written by Cary Coutant <ccoutant@gmail.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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#include <cassert>
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#include <stdint.h>
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#include <signal.h>
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#include <setjmp.h>
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extern int* const p;
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extern const int b[];
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extern const int* const q;
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extern const int c;
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int a = 123;
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extern const int* const cp __attribute__ ((section (".rodata"))) = &c;
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extern const int* const* const qp __attribute__ ((section (".rodata"))) = &q;
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volatile int segfaults = 0;
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sigjmp_buf jmp;
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void segv(int)
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{
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++segfaults;
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siglongjmp(jmp, 1);
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}
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int main()
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{
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assert(*p == 123);
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assert(b[0] == 100);
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assert(b[1] == 200);
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assert(b[2] == 300);
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assert(b[3] == 400);
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assert(c == 500);
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struct sigaction act;
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act.sa_handler = segv;
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sigemptyset(&act.sa_mask);
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act.sa_flags = 0;
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sigaction(SIGSEGV, &act, 0);
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assert(segfaults == 0);
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if (sigsetjmp(jmp, 1) == 0)
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*const_cast<const int **>(&p) = &c;
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assert(segfaults == 1);
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if (sigsetjmp(jmp, 1) == 0)
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*const_cast<int *>(b) = 99;
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assert(segfaults == 2);
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if (sigsetjmp(jmp, 1) == 0)
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*const_cast<int *>(cp) = c - 1;
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assert(segfaults == 3);
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if (sigsetjmp(jmp, 1) == 0)
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*const_cast<int **>(qp) = &a;
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assert(segfaults == 4);
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return 0;
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}
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