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mold/test/elf/ifunc-export.sh
2021-10-12 18:32:20 +09:00

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730 B
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#!/bin/bash
set -e
cd $(dirname $0)
mold=`pwd`/../../mold
echo -n "Testing $(basename -s .sh $0) ... "
t=$(pwd)/../../out/test/elf/$(basename -s .sh $0)
mkdir -p $t
# Skip if libc is musl because musl does not support GNU FUNC
echo 'int main() {}' | cc -o $t/exe -xc -
ldd $t/exe | grep -q ld-musl && { echo OK; exit; }
cat <<EOF | cc -c -fPIC -o $t/a.o -xc -
#include <stdio.h>
__attribute__((ifunc("resolve_foobar")))
void foobar(void);
void real_foobar(void) {
printf("Hello world\n");
}
typedef void Func();
Func *resolve_foobar(void) {
return real_foobar;
}
EOF
clang -fuse-ld=$mold -shared -o $t/b.so $t/a.o
readelf --dyn-syms $t/b.so | grep -Pq '(IFUNC|<OS specific>: 10)\s+GLOBAL DEFAULT \d+ foobar'
echo OK