[Bug build/28595] glibc-2.34 build fails with linker error (TLS transition from R_386_TLS_GOTIE to R_386_TLS_LE_32 against `__libc_tsd_CTYPE_B' at 0xf4 in section `.text' failed)

["jason at zx2c4 dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=28595

--- Comment #17 from Jason A. Donenfeld <jason at zx2c4 dot com> ---
I might be way off here, but...

    case R_386_TLS_GOTIE:
    case R_386_TLS_IE_32:
      /* Check transition from {IE_32,GOTIE} access model:
                subl foo@{tpoff,gontoff}(%reg1), %reg2
                movl foo@{tpoff,gontoff}(%reg1), %reg2
                addl foo@{tpoff,gontoff}(%reg1), %reg2
       */

      if (offset < 2 || (offset + 4) > sec->size)
        return false;

      val = bfd_get_8 (abfd, contents + offset - 1);
      if ((val & 0xc0) != 0x80 || (val & 7) == 4)
        return false;

      type = bfd_get_8 (abfd, contents + offset - 2);
      return type == 0x8b || type == 0x2b || type == 0x03;

It seems like it's looking at subl, movl (0x8b), and addl, but bfd does not
support the TLS_GOTIE relocation for kmovd.

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