https://sourceware.org/bugzilla/show_bug.cgi?id=20515
Bug ID: 20515
Summary: i386 ifunc and non-default symbol visibility
Product: binutils
Version: 2.28 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: amodra at gmail dot com
Target Milestone: ---
An adaptation of the existing pr19784 testcase.
cat > pr19784a.c <<\EOF
#include <stdio.h>
int bar(void);
int main(void)
{
if (bar())
printf ("PASS\n");
else
__builtin_abort ();
return 0;
}
EOF
cat > pr19784b.c <<\EOF
int foo (int x) __attribute__ ((ifunc ("resolve_foo")));
static int foo_impl(int x)
{
return x;
}
void *resolve_foo (void)
{
return (void *) foo_impl;
}
EOF
cat > pr19784c.c <<\EOF
extern int foo (int) __attribute__ ((visibility("hidden")));
int bar()
{
return foo (5) == 5;
}
EOF
gcc -m32 -c -g -O2 -fPIC pr19784a.c
gcc -m32 -c -g -O2 -fPIC pr19784b.c
gcc -m32 -c -g -O2 -fPIC pr19784c.c
gcc -m32 -shared -o libpr19784a.so pr19784b.o pr19784c.o
gcc -m32 -shared -o libpr19784b.so pr19784c.o pr19784b.o
gcc -m32 -o pr19784a pr19784a.o -Wl,--rpath=. libpr19784a.so
gcc -m32 -o pr19784b pr19784a.o -Wl,--rpath=. libpr19784b.so
./pr19784a
./pr19784b
The linker ought to issue an error rather than building invalid shared
libraries that segfault at runtime. Ditto for the pr14961 testcase.
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