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binutils-gdb/ld/genscripts.sh
Alan Modra 4b95cf5c0c Update copyright years
2014-03-05 22:16:15 +10:30

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#!/bin/sh
# genscripts.sh - generate the ld-emulation-target specific files
# Copyright (C) 2004-2014 Free Software Foundation, Inc.
#
# This file is part of the Gnu Linker.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GLD; see the file COPYING. If not, write to the Free
# Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
# 02110-1301, USA.
#
# Usage: genscripts_extra.sh \
# srcdir \
# libdir \
# prefix \
# exec_prefix \
# host \
# target \
# target_alias \
# default_emulation \
# native_lib_dirs \
# use_sysroot \
# enable_initfini_array \
# this_emulation \
# optional:
# tool_dir \
# customizer_script
#
# Sample usage:
#
# genscripts_extra.sh \
# /sources/ld \
# /usr/local/lib \
# /usr/local \
# /usr/local \
# sparc-sun-sunos4.1.3 \
# sparc-sun-sunos4.1.3 \
# sparc-sun-sunos4.1.3 \
# sun4 \
# "" \
# no \
# sun3 \
# sparc-sun-sunos4.1.3 \
# sparc.sh
#
# produces the linker scripts:
#
# sun3.x [default linker script]
# sun3.xbn [used when the linker is invoked with "-N"]
# sun3.xn [used when the linker is invoked with "-n"]
# sun3.xr [used when the linker is invoked with "-r"]
# sun3.xu [used when the linker is invoked with "-Ur"]
# and maybe:
# sun3.xc [used when the linker is invoked with "-z combreloc"]
# sun3.xsc [used when the linker is invoked with "--shared"]
# sun3.xdc [used when the linker is invoked with "-pie"]
# sun3.xa [used when the linker is invoked with "--enable-auto-import"]
#
# It also produced the C source file:
#
# em_sun3.c
#
# which is then compiled into the linker.
#
# The linker scripts are created by running the shell script
# /sources/ld/emulparams/sparc.sh to set the value of ${SCRIPT_NAME}
# (and any other variables it wants to). ${SCRIPT_NAME} is then
# invoked with a variable called ${LD_FLAG} to tell it which version
# of the linker script to create.
srcdir=$1
libdir=$2
prefix=$3
exec_prefix=$4
host=$5
target=$6
target_alias=$7
EMULATION_LIBPATH=$8
NATIVE_LIB_DIRS=$9
shift 9
use_sysroot=$1
ENABLE_INITFINI_ARRAY=$2
EMULATION_NAME=$3
TOOL_LIB=$4
CUSTOMIZER_SCRIPT=$5
if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then
CUSTOMIZER_SCRIPT=${EMULATION_NAME}
fi
CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh"
# Include the emulation-specific parameters:
. ${CUSTOMIZER_SCRIPT}
if test -d ldscripts; then
true
else
mkdir ldscripts
fi
# Set some flags for the emultempl scripts. USE_LIBPATH will
# be set for any libpath-using emulation; NATIVE will be set for a
# libpath-using emulation where ${host} = ${target}. NATIVE
# may already have been set by the emulparams file, but that's OK
# (it'll just get set to "yes" twice).
case " $EMULATION_LIBPATH " in
*" ${EMULATION_NAME} "*)
if [ "x${host}" = "x${target}" ] ; then
NATIVE=yes
USE_LIBPATH=yes
elif [ "x${use_sysroot}" = "xyes" ] ; then
USE_LIBPATH=yes
fi
;;
esac
# If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also.
if test "x$NATIVE" = "xyes" ; then
USE_LIBPATH=yes
fi
# Set the library search path, for libraries named by -lfoo.
# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
# Otherwise, the default is set here.
#
# The format is the usual list of colon-separated directories.
# To force a logically empty LIB_PATH, do LIBPATH=":".
#
# If we are using a sysroot, prefix library paths with "=" to indicate this.
#
# If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of
# the library path with the suffix applied.
# Paths with LIBPATH_SUFFIX
lib_path1=
# Paths without LIBPATH_SUFFIX
lib_path2=
if [ "${LIB_PATH}" != ":" ] ; then
lib_path2=${LIB_PATH}
fi
# Add args to lib_path1 and lib_path2, discarding any duplicates
append_to_lib_path()
{
if [ $# != 0 ]; then
for lib in "$@"; do
# The "=" is harmless if we aren't using a sysroot, but also needless.
if [ "x${use_sysroot}" = "xyes" ] ; then
lib="=${lib}"
fi
skip_lib=no
if test -n "${LIBPATH_SUFFIX}"; then
case "${lib}" in
*${LIBPATH_SUFFIX})
case :${lib_path1}: in
*:${lib}:*) ;;
::) lib_path1=${lib} ;;
*) lib_path1=${lib_path1}:${lib} ;;
esac ;;
*)
if test -n "${LIBPATH_SUFFIX_SKIP}"; then
case "${lib}" in
*${LIBPATH_SUFFIX_SKIP}) skip_lib=yes ;;
esac
fi
if test "${skip_lib}" = "no"; then
case :${lib_path1}: in
*:${lib}${LIBPATH_SUFFIX}:*) ;;
::) lib_path1=${lib}${LIBPATH_SUFFIX} ;;
*) lib_path1=${lib_path1}:${lib}${LIBPATH_SUFFIX} ;;
esac
fi ;;
esac
fi
if test "${skip_lib}" = "no"; then
case :${lib_path1}:${lib_path2}: in
*:${lib}:*) ;;
*::) lib_path2=${lib} ;;
*) lib_path2=${lib_path2}:${lib} ;;
esac
fi
done
fi
}
# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib when native
# except when LIBPATH=":".
if [ "${LIB_PATH}" != ":" ] ; then
libs=
if [ "x${TOOL_LIB}" = "x" ] ; then
if [ "x${NATIVE}" = "xyes" ] ; then
libs="${exec_prefix}/${target_alias}/lib"
fi
else
# For multilib'ed targets, ensure both ${target_alias}/lib${LIBPATH_SUFFIX}
# and ${TOOL_LIB}/lib${LIBPATH_SUFFIX} are in the default search path,
# because 64bit libraries may be in both places, depending on
# cross-development setup method (e.g.: /usr/s390x-linux/lib64
# vs. /usr/s390-linux/lib64)
case "${NATIVE}:${LIBPATH_SUFFIX}:${TOOL_LIB}" in
:* | *::* | *:*:*${LIBPATH_SUFFIX}) ;;
*) libs="${exec_prefix}/${target_alias}/lib${LIBPATH_SUFFIX}" ;;
esac
libs="${exec_prefix}/${TOOL_LIB}/lib ${libs}"
fi
append_to_lib_path ${libs}
fi
if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then
libs=${NATIVE_LIB_DIRS}
if [ "x${NATIVE}" = "xyes" ] ; then
case " ${libs} " in
*" ${libdir} "*) ;;
*) libs="${libdir} ${libs}" ;;
esac
fi
append_to_lib_path ${libs}
fi
case :${lib_path1}:${lib_path2}: in
*:: | ::*) LIB_PATH=${lib_path1}${lib_path2} ;;
*) LIB_PATH=${lib_path1}:${lib_path2} ;;
esac
LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
# We need it for testsuite.
set $EMULATION_LIBPATH
if [ "x$1" = "x$EMULATION_NAME" ]; then
test -d tmpdir || mkdir tmpdir
rm -f tmpdir/libpath.exp
echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
fi
# Generate 5 or 6 script files from a master script template in
# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh. Which one of the 5 or 6
# script files is actually used depends on command line options given
# to ld. (SCRIPT_NAME was set in the emulparams_file.)
#
# A .x script file is the default script.
# A .xr script is for linking without relocation (-r flag).
# A .xu script is like .xr, but *do* create constructors (-Ur flag).
# A .xn script is for linking with -n flag (mix text and data on same page).
# A .xbn script is for linking with -N flag (mix text and data on same page).
# A .xs script is for generating a shared library with the --shared
# flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
# emulation parameters.
# A .xc script is for linking with -z combreloc; it is only generated if
# $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
# $SCRIPT_NAME is "elf".
# A .xsc script is for linking with --shared -z combreloc; it is generated
# if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
# $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
# parameters too.
if [ "x$SCRIPT_NAME" = "xelf" ]; then
GENERATE_COMBRELOC_SCRIPT=yes
fi
SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
# Determine DATA_ALIGNMENT for the 5 variants, using
# values specified in the emulparams/<script_to_run>.sh file or default.
DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
LD_FLAG=r
DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
( echo "/* Script for ld -r: link without relocation */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr
LD_FLAG=u
DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
CONSTRUCTING=" "
( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu
LD_FLAG=
DATA_ALIGNMENT=${DATA_ALIGNMENT_}
RELOCATING=" "
( echo "/* Default linker script, for normal executables */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x
LD_FLAG=n
DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
( echo "/* Script for -n: mix text and data on same page */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn
LD_FLAG=N
DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
( echo "/* Script for -N: mix text and data on same page; don't align data */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xbn
if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
LD_FLAG=c
COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
( echo "/* Script for -z combreloc: combine and sort reloc sections */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc
rm -f ${COMBRELOC}
LD_FLAG=w
RELRO_NOW=" "
COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp
( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xw
rm -f ${COMBRELOC}
COMBRELOC=
unset RELRO_NOW
fi
if test -n "$GENERATE_SHLIB_SCRIPT"; then
LD_FLAG=shared
DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
CREATE_SHLIB=" "
(
echo "/* Script for ld --shared: link shared library */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xs
if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
LD_FLAG=cshared
DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp
( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc
rm -f ${COMBRELOC}
LD_FLAG=wshared
RELRO_NOW=" "
COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp
( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsw
rm -f ${COMBRELOC}
COMBRELOC=
unset RELRO_NOW
fi
unset CREATE_SHLIB
fi
if test -n "$GENERATE_PIE_SCRIPT"; then
LD_FLAG=pie
DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
CREATE_PIE=" "
(
echo "/* Script for ld -pie: link position independent executable */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xd
if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
LD_FLAG=cpie
DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp
( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdc
rm -f ${COMBRELOC}
LD_FLAG=wpie
RELRO_NOW=" "
COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp
( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdw
rm -f ${COMBRELOC}
COMBRELOC=
unset RELRO_NOW
fi
unset CREATE_PIE
fi
if test -n "$GENERATE_AUTO_IMPORT_SCRIPT"; then
LD_FLAG=auto_import
DATA_ALIGNMENT=${DATA_ALIGNMENT_}
(
echo "/* Script for ld --enable-auto-import: Like the default script except read only data is placed into .data */"
. ${CUSTOMIZER_SCRIPT}
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xa
fi
case "$COMPILE_IN: $EMULATION_LIBPATH " in
:*" ${EMULATION_NAME} "*) COMPILE_IN=yes;;
esac
# PR ld/5652:
# Determine if the shell has support for the variable BASH_LINENO.
# When it is the case, it is only available inside functions.
has_lineno()
{
test "x$BASH_LINENO" != "x"
}
# Enable accruate error source in the compiler error messages, if possible.
if has_lineno; then
. ${srcdir}/genscrba.sh
else
source_em()
{
. $1
}
fragment()
{
cat >> e${EMULATION_NAME}.c
}
fi
# Generate e${EMULATION_NAME}.c.
# Start with an empty file, then the sourced .em script
# can use the "fragment" function to append.
> e${EMULATION_NAME}.c
source_em ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
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