[Bug ld/21661] New: Ld failed to hide versioned common symbol

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=21661

            Bug ID: 21661
           Summary: Ld failed to hide versioned common symbol
           Product: binutils
           Version: 2.29 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

When hiding a versioned common symbol, the wrong address is used:

address@hidden xxx]$ cat foo.c
char *foo;

#ifdef COMPAT
asm (".symver foo,address@hidden");
#endif

void
check (char **p)
{
  if (p != &foo)
    __builtin_abort ();
}
address@hidden xxx]$ cat main.c 
extern void check ();
extern char *foo;

int
main ()
{
  check (&foo);
  return 0;
}
address@hidden xxx]$ cat foo.v
VERS.1 {
  global:
    foo;
};
address@hidden xxx]$ make
gcc -g -fPIC -c -o foo1.o foo.c
./ld -o foo1.so -shared foo1.o --version-script foo.v -soname=foo.so
gcc -g -fPIC -DCOMPAT -c -o foo2.o foo.c
./ld -o foo2.so -shared foo2.o --version-script foo.v -soname=foo.so
gcc -g   -c -o main.o main.c
gcc -o x main.o foo1.so -Wl,-R,.
readelf -sW foo1.so | grep foo
     5: 0000000000201020     8 OBJECT  GLOBAL DEFAULT   14 foo@@VERS.1
    21: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS foo.c
    29: 0000000000201020     8 OBJECT  GLOBAL DEFAULT   14 foo
readelf -sW foo2.so | grep foo
     2: 0000000000201020     8 OBJECT  GLOBAL DEFAULT   12 address@hidden
    19: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS foo.c
    22: 0000000000201028     8 OBJECT  LOCAL  DEFAULT   12 foo

foo should have the same address as address@hidden

    25: 0000000000201020     8 OBJECT  GLOBAL DEFAULT   12 address@hidden
ln -sf foo1.so foo.so
./x
ln -sf foo2.so foo.so
./x
Makefile:7: recipe for target 'all' failed
make: *** [all] Aborted (core dumped)
address@hidden xxx]$

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