76 lines
2 KiB
C++
76 lines
2 KiB
C++
// copy_test_relro.cc -- test copy relocs against read-only and relro symbols.
|
|
|
|
// Copyright (C) 2016-2022 Free Software Foundation, Inc.
|
|
// Written by Cary Coutant <ccoutant@gmail.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 <cassert>
|
|
#include <stdint.h>
|
|
#include <signal.h>
|
|
#include <setjmp.h>
|
|
|
|
extern int* const p;
|
|
extern const int b[];
|
|
extern const int* const q;
|
|
extern const int c;
|
|
int a = 123;
|
|
|
|
extern const int* const cp __attribute__ ((section (".rodata"))) = &c;
|
|
extern const int* const* const qp __attribute__ ((section (".rodata"))) = &q;
|
|
|
|
volatile int segfaults = 0;
|
|
sigjmp_buf jmp;
|
|
|
|
void segv(int)
|
|
{
|
|
++segfaults;
|
|
siglongjmp(jmp, 1);
|
|
}
|
|
|
|
int main()
|
|
{
|
|
assert(*p == 123);
|
|
assert(b[0] == 100);
|
|
assert(b[1] == 200);
|
|
assert(b[2] == 300);
|
|
assert(b[3] == 400);
|
|
assert(c == 500);
|
|
|
|
struct sigaction act;
|
|
act.sa_handler = segv;
|
|
sigemptyset(&act.sa_mask);
|
|
act.sa_flags = 0;
|
|
sigaction(SIGSEGV, &act, 0);
|
|
|
|
assert(segfaults == 0);
|
|
if (sigsetjmp(jmp, 1) == 0)
|
|
*const_cast<const int **>(&p) = &c;
|
|
assert(segfaults == 1);
|
|
if (sigsetjmp(jmp, 1) == 0)
|
|
*const_cast<int *>(b) = 99;
|
|
assert(segfaults == 2);
|
|
if (sigsetjmp(jmp, 1) == 0)
|
|
*const_cast<int *>(cp) = c - 1;
|
|
assert(segfaults == 3);
|
|
if (sigsetjmp(jmp, 1) == 0)
|
|
*const_cast<int **>(qp) = &a;
|
|
assert(segfaults == 4);
|
|
|
|
return 0;
|
|
}
|