[Bug ld/6480] New: tls-model global-dynamic w/o @PLT leading to binutils assertion failure

[edwintorok at gmail dot com]

I get a binutils assertion failure when compiling the testcase below (with
either gcc 4.2 or gcc 4.3)

$ gcc gd.c
/usr/bin/ld: BFD (GNU Binutils for Debian) 2.18.0.20080103 assertion fail
../../bfd/elf64-x86-64.c:2548
/usr/bin/ld: BFD (GNU Binutils for Debian) 2.18.0.20080103 assertion fail
../../bfd/elf64-x86-64.c:2548
/usr/bin/ld: BFD (GNU Binutils for Debian) 2.18.0.20080103 assertion fail
../../bfd/elf64-x86-64.c:2548

gcc generates 'call __tls_get_addr'. If I replace it with 'call
address@hidden' I no longer get this assertion failure:

$ gcc gd.c -S -o gd.s
$ sed -i 's/__tls_get_addr/address@hidden/' gd.s
$ as gd.s -o gd.o && gcc gd.o

This is the testcase:

int f(void *a){
  static __thread __attribute__((tls_model ("global-dynamic"))) int i = 1;
  i++;
  return i;
}
int main()
{
        return f(0);
}

System info:
$ uname -a
Linux lightspeed2 2.6.25-rc8 #5 Tue Apr 8 21:16:47 EEST 2008 x86_64 GNU/Linux

$ gcc -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.2
--program-suffix=-4.2 --enable-clocale=gnu --enable-libstdcxx-debug
--enable-objc-gc --enable-mpfr --disable-libmudflap --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.2.3 (Debian 4.2.3-4)

$ gcc-4.3 -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure linux gnu
Thread model: posix
gcc version 4.3.1 20080401 (prerelease) (Debian 4.3.0-3)

$ ld -v
GNU ld (GNU Binutils for Debian) 2.18.0.20080103

-- 
           Summary: tls-model global-dynamic w/o @PLT leading to binutils
                    assertion failure
           Product: binutils
           Version: 2.18
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: edwintorok at gmail dot com
                CC: bug-binutils at gnu dot org
 GCC build triplet: x86_64-linux-gnu
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


http://sourceware.org/bugzilla/show_bug.cgi?id=6480

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