#!/bin/sh
# genscripts.sh - generate the ld-emulation-target specific files
+# Copyright 2007 Free Software Foundation, Inc.
#
-# Usage: genscripts.sh srcdir libdir host target target_alias \
-# default_emulation native_lib_dirs this_emulation tool_dir
+# 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 \
+# this_emulation \
+# optional:
+# tool_dir \
+# customizer_script
#
# Sample usage:
-# genscripts.sh /djm/ld-devo/devo/ld /usr/local/lib sparc-sun-sunos4.1.3 \
-# sparc-sun-sunos4.1.3 sparc-sun-sunos4.1.3 sun4 "" sun3 sparc-sun-sunos4.1.3
-# produces sun3.x sun3.xbn sun3.xn sun3.xr sun3.xu em_sun3.c
+#
+# 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"]
+#
+# 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
-host=$3
-target=$4
-target_alias=$5
-EMULATION_LIBPATH=$6
-NATIVE_LIB_DIRS=$7
-EMULATION_NAME=$8
-tool_lib=`echo ${libdir} | sed -e 's|/lib$||'`/${9-$target_alias}/lib
+prefix=$3
+exec_prefix=$4
+host=$5
+target=$6
+target_alias=$7
+EMULATION_LIBPATH=$8
+NATIVE_LIB_DIRS=$9
+shift 9
+use_sysroot=$1
+EMULATION_NAME=$2
+TOOL_LIB=$3
+CUSTOMIZER_SCRIPT=$4
+
+# Can't use ${TOOL_LIB:-$target_alias} here due to an Ultrix shell bug.
+if [ "x${TOOL_LIB}" = "x" ] ; then
+ tool_lib=${exec_prefix}/${target_alias}/lib
+else
+ tool_lib=${exec_prefix}/${TOOL_LIB}/lib
+fi
+
+if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then
+ CUSTOMIZER_SCRIPT=${EMULATION_NAME}
+fi
+CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh"
# Include the emulation-specific parameters:
-. ${srcdir}/emulparams/${EMULATION_NAME}.sh
+. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
if test -d ldscripts; then
true
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$NATIVE" = "xyes" ; then
+ USE_LIBPATH=yes
+fi
+
# Set the library search path, for libraries named by -lfoo.
# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
# Otherwise, the default is set here.
#
# The format is the usual list of colon-separated directories.
# To force a logically empty LIB_PATH, do LIBPATH=":".
+#
+# If we are using a sysroot, prefix library paths with "=" to indicate this.
+#
+# If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of
+# the library path with the suffix applied.
-if [ "x${LIB_PATH}" = "x" ] ; then
- # Cross, or native non-default emulation not requesting LIB_PATH.
- LIB_PATH=
-
- if [ "x${host}" = "x${target}" ] ; then
- case " $EMULATION_LIBPATH " in
- *" ${EMULATION_NAME} "*)
- # Native, and default or emulation requesting LIB_PATH.
- LIB_PATH=/lib:/usr/lib
- if [ -n "${NATIVE_LIB_DIRS}" ]; then
- LIB_PATH=${LIB_PATH}:${NATIVE_LIB_DIRS}
- fi
- if [ "${libdir}" != /usr/lib ]; then
- LIB_PATH=${LIB_PATH}:${libdir}
- fi
- if [ "${libdir}" != /usr/local/lib ] ; then
- LIB_PATH=${LIB_PATH}:/usr/local/lib
- fi
+if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then
+ LIB_PATH2=
+
+ libs=${NATIVE_LIB_DIRS}
+ if [ "x${use_sysroot}" != "xyes" ] ; then
+ case " ${libs} " in
+ *" ${libdir} "*) ;;
+ *) libs="${libdir} ${libs}" ;;
+ esac
+ case " ${libs} " in
+ *" ${tool_lib} "*) ;;
+ *) libs="${tool_lib} ${libs}" ;;
esac
fi
+
+ for lib in ${libs}; do
+ # The "=" is harmless if we aren't using a sysroot, but also needless.
+ if [ "x${use_sysroot}" = "xyes" ] ; then
+ lib="=${lib}"
+ fi
+ addsuffix=
+ case "${LIBPATH_SUFFIX}:${lib}" in
+ :*) ;;
+ *:*${LIBPATH_SUFFIX}) ;;
+ *) addsuffix=yes ;;
+ esac
+ if test -n "$addsuffix"; then
+ case :${LIB_PATH}: in
+ *:${lib}${LIBPATH_SUFFIX}:*) ;;
+ ::) LIB_PATH=${lib}${LIBPATH_SUFFIX} ;;
+ *) LIB_PATH=${LIB_PATH}:${lib}${LIBPATH_SUFFIX} ;;
+ esac
+ case :${LIB_PATH}:${LIB_PATH2}: in
+ *:${lib}:*) ;;
+ *::) LIB_PATH2=${lib} ;;
+ *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
+ esac
+ else
+ case :${LIB_PATH2}: in
+ *:${lib}:*) ;;
+ ::) LIB_PATH2=${lib} ;;
+ *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
+ esac
+ fi
+ done
+
+ case :${LIB_PATH}:${LIB_PATH2}: in
+ *:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;;
+ *) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;;
+ esac
fi
-# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib.
-LIB_PATH=${LIB_PATH}:${tool_lib}
+# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
+# sysrooted configurations and when LIBPATH=":".
+if [ "x${use_sysroot}" != "xyes" ] ; then
+ case :${LIB_PATH}: in
+ ::: | *:${tool_lib}:*) ;;
+ ::) LIB_PATH=${tool_lib} ;;
+ *) LIB_PATH=${tool_lib}:${LIB_PATH} ;;
+ esac
+ # For multilib targets, search both $tool_lib dirs
+ if [ "x${LIBPATH_SUFFIX}" != "x" ] ; then
+ case :${LIB_PATH}: in
+ ::: | *:${tool_lib}${LIBPATH_SUFFIX}:*) ;;
+ ::) LIB_PATH=${tool_lib}${LIBPATH_SUFFIX} ;;
+ *) LIB_PATH=${tool_lib}${LIBPATH_SUFFIX}:${LIB_PATH} ;;
+ esac
+ fi
+fi
-LIB_SEARCH_DIRS=`echo ${LIB_PATH} | tr ':' ' ' | sed -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
+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
# 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=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
+SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
# Determine DATA_ALIGNMENT for the 5 variants, using
-# values specified in the emulparams/<emulation>.sh file or default.
+# values specified in the emulparams/<script_to_run>.sh file or default.
DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
LD_FLAG=r
DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
-(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
- ldscripts/${EMULATION_NAME}.xr
+( echo "/* Script for ld -r: link without relocation */"
+ . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr
LD_FLAG=u
DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
CONSTRUCTING=" "
-(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
- ldscripts/${EMULATION_NAME}.xu
+( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
+ . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu
LD_FLAG=
DATA_ALIGNMENT=${DATA_ALIGNMENT_}
RELOCATING=" "
-(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
- ldscripts/${EMULATION_NAME}.x
+( echo "/* Default linker script, for normal executables */"
+ . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x
LD_FLAG=n
DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
-TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
-(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
- ldscripts/${EMULATION_NAME}.xn
+( echo "/* Script for -n: mix text and data on same page */"
+ . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn
LD_FLAG=N
DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
-(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
- ldscripts/${EMULATION_NAME}.xbn
+( echo "/* Script for -N: mix text and data on same page; don't align data */"
+ . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${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} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${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} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${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=" "
- # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
- (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
- ldscripts/${EMULATION_NAME}.xs
+ (
+ echo "/* Script for ld --shared: link shared library */"
+ . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${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} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${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} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+ ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsw
+ rm -f ${COMBRELOC}
+ COMBRELOC=
+ unset RELRO_NOW
+ fi
+ unset CREATE_SHLIB
fi
-for i in $EMULATION_LIBPATH ; do
- test "$i" = "$EMULATION_NAME" && COMPILE_IN=true
-done
+if test -n "$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} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${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} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${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} ${EMULATION_NAME}
+ . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+ ) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdw
+ rm -f ${COMBRELOC}
+ COMBRELOC=
+ unset RELRO_NOW
+ fi
+ unset CREATE_PIE
+fi
+
+case " $EMULATION_LIBPATH " in
+ *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
+esac
+
+if test -n "${BASH+set}"; then
+ source_em()
+ {
+ local current_script="$em_script"
+ em_script=$1
+ . $em_script
+ em_script=$current_script
+ }
+ fragment()
+ {
+ local lineno=$[${BASH_LINENO[0]} + 1]
+ echo >> e${EMULATION_NAME}.c "#line $lineno \"$em_script\""
+ cat >> e${EMULATION_NAME}.c
+ }
+else
+ source_em()
+ {
+ . $1
+ }
+ fragment()
+ {
+ cat >> e${EMULATION_NAME}.c
+ }
+fi
# Generate e${EMULATION_NAME}.c.
-. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
+# 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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