r195588 - in /branches/google/gcc-4_6-mobile-vt...

[ctice at gcc dot gnu dot org]

Author: ctice
Date: Wed Jan 30 19:16:16 2013
New Revision: 195588

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195588
Log:
Change vtable verification to put vtable map variables (and
other variables we need to protect) into their own named
section (".vtable_map_vars") rather than into .relro.  This is 
to avoid changing permissions on the entiro relro segment.
Force the new section to be page-aligned and page-size-padded
through two special symbols (_vtable_map_vars_start,
vtable_map_vars_end).  Read section header out of files on disk
to find the section in memory, to change protections on it.
Using mechanism similar to crtbegin/crtend, force
_vtable_map_vars_start to be very first symbol in section; force
_vtable_map_vars_end to be very last symbol in section.  Update
driver to put out appropriate linker options.



Modified:
    branches/google/gcc-4_6-mobile-vtable-security/libstdc++-v3/configure
    branches/google/gcc-4_6-mobile-vtable-security/libstdc++-v3/libsupc++/vtv_rts.cc
    branches/google/gcc-4_6-mobile-vtable-security/libstdc++-v3/libsupc++/vtv_utils.h

Changes in other areas also in this revision:
Added:
    branches/google/gcc-4_6-mobile-vtable-security/libgcc/vtv_end.c
    branches/google/gcc-4_6-mobile-vtable-security/libgcc/vtv_start.c
Modified:
    branches/google/gcc-4_6-mobile-vtable-security/ChangeLog.vtable-security
    branches/google/gcc-4_6-mobile-vtable-security/configure
    branches/google/gcc-4_6-mobile-vtable-security/gcc/cgraph.h
    branches/google/gcc-4_6-mobile-vtable-security/gcc/config.gcc
    branches/google/gcc-4_6-mobile-vtable-security/gcc/config/gnu-user.h
    branches/google/gcc-4_6-mobile-vtable-security/gcc/config/i386/linux.h
    branches/google/gcc-4_6-mobile-vtable-security/gcc/config/i386/linux64.h
    branches/google/gcc-4_6-mobile-vtable-security/gcc/cp/g++spec.c
    branches/google/gcc-4_6-mobile-vtable-security/gcc/cp/vtable-class-hierarchy.c
    branches/google/gcc-4_6-mobile-vtable-security/gcc/tree-vtable-verify.c
    branches/google/gcc-4_6-mobile-vtable-security/gcc/varasm.c
    branches/google/gcc-4_6-mobile-vtable-security/gcc/varpool.c
    branches/google/gcc-4_6-mobile-vtable-security/libgcc/Makefile.in
    branches/google/gcc-4_6-mobile-vtable-security/libgcc/config.host