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mold/test/elf/ifunc-export.sh
2022-09-29 20:02:33 +08:00

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#!/bin/bash
export LC_ALL=C
set -e
CC="${TEST_CC:-cc}"
CXX="${TEST_CXX:-c++}"
GCC="${TEST_GCC:-gcc}"
GXX="${TEST_GXX:-g++}"
MACHINE="${MACHINE:-$(uname -m)}"
testname=$(basename "$0" .sh)
echo -n "Testing $testname ... "
t=out/test/elf/$MACHINE/$testname
mkdir -p $t
# IFUNC is not supported on RISC-V yet
[ $MACHINE = riscv32 ] && { echo skipped; exit; }
[ $MACHINE = riscv64 ] && { echo skipped; exit; }
# Skip if libc is musl because musl does not support GNU FUNC
ldd --help 2>&1 | grep -q musl && { echo skipped; 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
$CC -B. -shared -o $t/b.so $t/a.o
readelf --dyn-syms $t/b.so | grep -Eq '(IFUNC|<OS specific>: 10)\s+GLOBAL DEFAULT .* foobar'
echo OK