[Bug dynamic-link/17711] New: copy relocations against protected symbols don't work

["hjl.tools at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17711

            Bug ID: 17711
           Summary: copy relocations against protected symbols don't work
           Product: glibc
           Version: 2.21
            Status: NEW
          Severity: normal
          Priority: P2
         Component: dynamic-link
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com

On Linux/x86-64, I got

[hjl@gnu-tools-1 pr15228]$ cat x.c 
extern int a;

extern void bar (void);

int main()
{
  bar ();
  if (a != 30)
    __builtin_abort();
  return 0;
}
[hjl@gnu-tools-1 pr15228]$ cat bar.c 
int a;

__attribute__((visibility("protected"))) int a;

void
bar ()
{
  a = 30;
}
[hjl@gnu-tools-1 pr15228]$ make all
gcc  -B/bin/    -c -o x.o x.c
gcc  -B/bin/ -fPIC   -c -o bar.o bar.c
./ld -shared -o libbar.so bar.o
gcc  -B/bin/  -o x x.o libbar.so -Wl,-rpath,.
./x
make: *** [all] Aborted (core dumped)
[hjl@gnu-tools-1 pr15228]$ 

Should it be disallowed by linker?

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