[GOLD][PATCH] Handle 32-bit initial TLS relocations for ARM target.

[=?big5?b?RG91ZyBLd2FuICjD9q62vHcp?= <dougkwan at google dot com>]

Hi,

      This patch adds some support for initial TLS relocations for the
ARM target.  It is required for running the gold test suite on an ARM
system running Ubuntu.  It is not yet complete.  There are known
issues:

-TLS relocations in static output objects do not work.
-12-bit TLS relocations not supported.
-TLS optimization not supported.
-Additional TLS relocations defined in
http://www.lsd.ic.unicamp.br/~oliva/writeups/TLS/RFC-TLSDESC-ARM.txt
not supported.

These will be fixed or implemented later.   This patch allows most of
the tests in the test suite to build.

-Doug

2010-02-18  Doug Kwan  <dougkwan@google.com>

        * arm-reloc.def: Mark R_ARM_TLS_GD32, R_ARM_TLS_LDM32,
        R_ARM_TLS_LDO32, R_ARM_TLS_IE32 and R_ARM_TLS_LE32 are implemented.
        * arm.cc (Arm_relocation_functions): New forward declaration.
        (Target_arm::Target_arm): Initialize new data members
        got_mod_index_offset_ and tls_base_symbol_defined_.
        (Target_arm::Relocate::relocate_tls): New method.
        (Target_arm::optimize_tls_reloc, Target_arm::define_tls_base_symbol,
         Target_arm::got_mod_index_entry, Target_arm::rel_tls_desc_section):
        New methods.
        (Target_arm::Got_type): Add GOT_TYPE_TLS_NOFFSET, GOT_TYPE_OFFSET,
        GOT_TYPE_TLS_PAIR and GOT_TYPE_TLS_DESC.
        (Target_arm::got_mod_index_offset_,
        Target_arm::tls_base_symbol_defined_): New data members.
        (Target_arm::Scan::local, Target::Scan::global,
        Target_arm::Relocate::relocate): Handle 32-bit initial TLS
        relocations.

Attachment: patch-tls.txt
Description: Text document