[Bug driver/81498] Support creating static PIE

["hjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81498

--- Comment #1 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Sep 12 16:30:28 2017
New Revision: 252034

URL: https://gcc.gnu.org/viewcvs?rev=252034&root=gcc&view=rev
Log:
Add -static-pie to GCC driver to create static PIE

This patch adds -static-pie to GCC driver to create static PIE.  A static
position independent executable (PIE) is similar to static executable,
but can be loaded at any address without a dynamic linker.  All linker
input files must be compiled with -fpie or -fPIE and linker must support
--no-dynamic-linker to avoid linking with dynamic linker.  "-z text" is
also needed to prevent dynamic relocations in read-only segments.

        PR driver/81498
        * common.opt (-static-pie): New alias.
        (shared): Negate static-pie.
        (-no-pie): Update help text.
        (-pie): Likewise.
        (static-pie): New option.
        * config/gnu-user.h (GNU_USER_TARGET_STARTFILE_SPEC): Add
        -static-pie support.
        (GNU_USER_TARGET_ENDFILE_SPEC): Likewise.
        (LINK_EH_SPEC): Likewise.
        (LINK_GCC_C_SEQUENCE_SPEC): Likewise.
        * config/i386/gnu-user.h (GNU_USER_TARGET_LINK_SPEC): Likewise.
        * config/i386/gnu-user64.h (GNU_USER_TARGET_LINK_SPEC): Likewise.
        * gcc.c (LINK_COMMAND_SPEC): Likewise.
        (init_gcc_specs): Likewise.
        (init_spec): Likewise.
        (display_help): Update help message for -pie.
        * doc/invoke.texi: Update -pie, -no-pie and -static.  Document
        -static-pie.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/common.opt
    trunk/gcc/config/gnu-user.h
    trunk/gcc/config/i386/gnu-user.h
    trunk/gcc/config/i386/gnu-user64.h
    trunk/gcc/doc/invoke.texi
    trunk/gcc/gcc.c