git: gcc44, crtstuff: Provide -fPIE support

[John Marino <marino@xxxxxxxxxxxxxxxxxxxxxxx>]

commit e101389cdfc0ee127faf5259925a47b42b692580
Author: John Marino <draco@marino.st>
Date:   Sat Apr 9 15:14:25 2011 +0200

    gcc44, crtstuff: Provide -fPIE support
    
    Properly support Position Independent Executables (PIE) generation by
    linking PIE binaries with specially-built Scrt1.o instead of crt1.o.
    The latter is built without the -fPIC flag.
    
    For the i386 version, gcc-2 code was first purged, and then the new
    assembly was placed in a separate file.  All data extracted by the
    assembler stub as explicit parameters.  The hidden _start1 symbol is used
    as an interface between the assembly and C code.
    
    The CFLAGS -fkeep-inline-functions was removed as it was legacy FreeBSD
    code that has been long since removed.  The CFLAGS -elf was removed as
    all DragonFly targets are elf.  The LDFLAGS -elf was removed because it
    was getting interpreted as "-entry=lf" by ld.  LDFLAGS weren't even used
    before this commit so it's always been completely extraneous.
    
    For x86_64, the no-omit-frame-pointer flag was added during the build of
    crt1.o.  For the builtin gcc function __builtin_frame_address to work, all
    call frames need to save the frame pointer.  In particular, this is
    important for the upper frame that should terminate the chain.

Summary of changes:
 contrib/gcc-4.4/gcc/config/dragonfly.h |   15 ++-
 lib/csu/i386/Makefile.csu              |   31 +++++--
 lib/csu/i386/crt1.c                    |  147 --------------------------------
 lib/csu/i386/crt1_c.c                  |   96 +++++++++++++++++++++
 lib/csu/i386/crt1_s.S                  |   49 +++++++++++
 lib/csu/x86_64/Makefile.csu            |    6 +-
 6 files changed, 182 insertions(+), 162 deletions(-)
 delete mode 100644 lib/csu/i386/crt1.c
 create mode 100644 lib/csu/i386/crt1_c.c
 create mode 100644 lib/csu/i386/crt1_s.S

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/e101389cdfc0ee127faf5259925a47b42b692580


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