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mold/test/elf/copyrel-relro.sh
Rui Ueyama e6d4154688 [ELF] Generalize tests
With this change, you can now cross compile test cases and run
them on qemu-user. Here is an example to run our test suits in
an emulated ARM32 environment.

$ CC=arm-linux-gnueabihf-gcc \
  CXX=arm-linux-gnueabihf-g++ \
  GCC=arm-linux-gnueabihf-gcc \
  GXX=arm-linux-gnueabihf-g++ \
  OBJDUMP=arm-linux-gnueabihf-objdump \
  MACHINE=arm \
  QEMU='qemu-arm -L /usr/arm-linux-gnueabihf' \
  make -j16 test
2022-04-02 16:53:41 +08:00

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#!/bin/bash
export LC_ALL=C
set -e
CC="${CC:-cc}"
CXX="${CXX:-c++}"
GCC="${GCC:-gcc}"
GXX="${GXX:-g++}"
OBJDUMP="${OBJDUMP:-objdump}"
MACHINE="${MACHINE:-$(uname -m)}"
testname=$(basename "$0" .sh)
echo -n "Testing $testname ... "
cd "$(dirname "$0")"/../..
mold="$(pwd)/mold"
t=out/test/elf/$testname
mkdir -p $t
cat <<EOF | $CC -o $t/a.o -c -xc -fno-PIE -
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
extern const char readonly[100];
extern char readwrite[100];
static int segv = 0;
static jmp_buf buf;
void handler(int sig) {
segv = 1;
longjmp(buf, 1);
}
int main() {
signal(SIGSEGV, handler);
readwrite[0] = 5;
int x = segv;
if (setjmp(buf) == 0)
*(char *)readonly = 5;
int y = segv;
printf("sigsegv %d %d\n", x, y);
}
EOF
cat <<EOF | $CC -fPIC -shared -o $t/b.so -xc -
const char readonly[100] = "abc";
char readwrite[100] = "abc";
EOF
$CC -B. $t/a.o $t/b.so -o $t/exe -no-pie
$QEMU $t/exe | grep -q '^sigsegv 0 1$'
echo OK