[Bug ld/13301] New: Wrong linker relaxation for TLS_LDM_CALL and TLS_GD_CALL on SPARC

[ebotcazou at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=13301

             Bug #: 13301
           Summary: Wrong linker relaxation for TLS_LDM_CALL and
                    TLS_GD_CALL on SPARC
           Product: binutils
           Version: 2.23 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: address@hidden
        ReportedBy: address@hidden
    Classification: Unclassified


This is the miscompilation of MPFR 3.1.0 on SPARC/Linux, initially filed as
  http://gcc.gnu.org/PR50683

The compiler generates at -O2 -fPIC:

    add    %l7, %l3, %l3, %tgd_add(__gmpfr_flags)
[...]
    call    __tls_get_addr, %tgd_call(__gmpfr_flags)
     mov    %l3, %o0
    ld    [%o0], %g1

and the linker turns this into:

   0x00014d14 <+504>:   add  %g7, %o0, %o0
   0x00014d18 <+508>:   mov  %l3, %o0
   0x00014d1c <+512>:   ld  [ %o0 ], %g1

so segfault on the load.  Both TLS_LDM_CALL and TLS_GD_CALL are affected.

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