On Fri, Mar 2, 2012 at 9:36 PM, H.J. Lu <hongjiu...@intel.com> wrote:
> X86-64 linker optimizes TLS_MODEL_INITIAL_EXEC to TLS_MODEL_LOCAL_EXEC > by checking > > movq foo@gottpoff(%rip), %reg > > and > > addq foo@gottpoff(%rip), %reg > > It uses the REX prefix to avoid the last byte of the previous > instruction. With 32bit Pmode, we may not have the REX prefix and > the last byte of the previous instruction may be an offset, which > may look like a REX prefix. IE->LE optimization will generate corrupted > binary. This patch makes sure we always output an REX pfrefix for > UNSPEC_GOTNTPOFF. OK for trunk? No, please implement this using UNSPEC in the same way as tls_initial_exec_64_sun implements Sun linker quirk. Uros.
