447 lines
14 KiB
Bash
Executable File
447 lines
14 KiB
Bash
Executable File
#!/bin/sh
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# genscripts.sh - generate the ld-emulation-target specific files
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# Copyright 2004, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
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#
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# This file is part of the Gnu Linker.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with GLD; see the file COPYING. If not, write to the Free
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# Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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# 02110-1301, USA.
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#
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# Usage: genscripts_extra.sh \
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# srcdir \
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# libdir \
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# prefix \
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# exec_prefix \
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# host \
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# target \
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# target_alias \
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# default_emulation \
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# native_lib_dirs \
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# use_sysroot \
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# enable_initfini_array \
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# this_emulation \
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# optional:
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# tool_dir \
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# customizer_script
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#
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# Sample usage:
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#
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# genscripts_extra.sh \
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# /sources/ld \
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# /usr/local/lib \
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# /usr/local \
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# /usr/local \
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# sparc-sun-sunos4.1.3 \
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# sparc-sun-sunos4.1.3 \
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# sparc-sun-sunos4.1.3 \
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# sun4 \
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# "" \
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# no \
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# sun3 \
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# sparc-sun-sunos4.1.3 \
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# sparc.sh
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#
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# produces the linker scripts:
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#
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# sun3.x [default linker script]
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# sun3.xbn [used when the linker is invoked with "-N"]
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# sun3.xn [used when the linker is invoked with "-n"]
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# sun3.xr [used when the linker is invoked with "-r"]
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# sun3.xu [used when the linker is invoked with "-Ur"]
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# and maybe:
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# sun3.xc [used when the linker is invoked with "-z combreloc"]
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# sun3.xsc [used when the linker is invoked with "--shared"]
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# sun3.xdc [used when the linker is invoked with "-pie"]
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# sun3.xa [used when the linker is invoked with "--enable-auto-import"]
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#
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# It also produced the C source file:
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#
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# em_sun3.c
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#
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# which is then compiled into the linker.
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#
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# The linker scripts are created by running the shell script
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# /sources/ld/emulparams/sparc.sh to set the value of ${SCRIPT_NAME}
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# (and any other variables it wants to). ${SCRIPT_NAME} is then
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# invoked with a variable called ${LD_FLAG} to tell it which version
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# of the linker script to create.
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srcdir=$1
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libdir=$2
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prefix=$3
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exec_prefix=$4
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host=$5
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target=$6
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target_alias=$7
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EMULATION_LIBPATH=$8
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NATIVE_LIB_DIRS=$9
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shift 9
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use_sysroot=$1
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ENABLE_INITFINI_ARRAY=$2
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EMULATION_NAME=$3
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TOOL_LIB=$4
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CUSTOMIZER_SCRIPT=$5
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if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then
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CUSTOMIZER_SCRIPT=${EMULATION_NAME}
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fi
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CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh"
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# Include the emulation-specific parameters:
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. ${CUSTOMIZER_SCRIPT}
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if test -d ldscripts; then
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true
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else
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mkdir ldscripts
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fi
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# Set some flags for the emultempl scripts. USE_LIBPATH will
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# be set for any libpath-using emulation; NATIVE will be set for a
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# libpath-using emulation where ${host} = ${target}. NATIVE
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# may already have been set by the emulparams file, but that's OK
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# (it'll just get set to "yes" twice).
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case " $EMULATION_LIBPATH " in
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*" ${EMULATION_NAME} "*)
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if [ "x${host}" = "x${target}" ] ; then
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NATIVE=yes
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USE_LIBPATH=yes
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elif [ "x${use_sysroot}" = "xyes" ] ; then
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USE_LIBPATH=yes
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fi
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;;
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esac
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# If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also.
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if test "x$NATIVE" = "xyes" ; then
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USE_LIBPATH=yes
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fi
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# Set the library search path, for libraries named by -lfoo.
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# If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
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# Otherwise, the default is set here.
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#
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# The format is the usual list of colon-separated directories.
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# To force a logically empty LIB_PATH, do LIBPATH=":".
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#
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# If we are using a sysroot, prefix library paths with "=" to indicate this.
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#
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# If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of
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# the library path with the suffix applied.
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# Paths with LIBPATH_SUFFIX
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lib_path1=
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# Paths without LIBPATH_SUFFIX
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lib_path2=
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if [ "${LIB_PATH}" != ":" ] ; then
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lib_path2=${LIB_PATH}
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fi
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# Add args to lib_path1 and lib_path2, discarding any duplicates
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append_to_lib_path()
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{
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if [ $# != 0 ]; then
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for lib in "$@"; do
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# The "=" is harmless if we aren't using a sysroot, but also needless.
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if [ "x${use_sysroot}" = "xyes" ] ; then
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lib="=${lib}"
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fi
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skip_lib=no
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if test -n "${LIBPATH_SUFFIX}"; then
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case "${lib}" in
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*${LIBPATH_SUFFIX})
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case :${lib_path1}: in
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*:${lib}:*) ;;
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::) lib_path1=${lib} ;;
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*) lib_path1=${lib_path1}:${lib} ;;
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esac ;;
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*)
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if test -n "${LIBPATH_SUFFIX_SKIP}"; then
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case "${lib}" in
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*${LIBPATH_SUFFIX_SKIP}) skip_lib=yes ;;
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esac
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fi
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if test "${skip_lib}" = "no"; then
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case :${lib_path1}: in
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*:${lib}${LIBPATH_SUFFIX}:*) ;;
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::) lib_path1=${lib}${LIBPATH_SUFFIX} ;;
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*) lib_path1=${lib_path1}:${lib}${LIBPATH_SUFFIX} ;;
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esac
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fi ;;
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esac
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fi
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if test "${skip_lib}" = "no"; then
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case :${lib_path1}:${lib_path2}: in
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*:${lib}:*) ;;
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*::) lib_path2=${lib} ;;
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*) lib_path2=${lib_path2}:${lib} ;;
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esac
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fi
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done
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fi
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}
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# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib when native
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# except when LIBPATH=":".
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if [ "${LIB_PATH}" != ":" ] ; then
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libs=
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if [ "x${TOOL_LIB}" = "x" ] ; then
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if [ "x${NATIVE}" = "xyes" ] ; then
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libs="${exec_prefix}/${target_alias}/lib"
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fi
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else
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# For multilib'ed targets, ensure both ${target_alias}/lib${LIBPATH_SUFFIX}
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# and ${TOOL_LIB}/lib${LIBPATH_SUFFIX} are in the default search path,
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# because 64bit libraries may be in both places, depending on
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# cross-development setup method (e.g.: /usr/s390x-linux/lib64
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# vs. /usr/s390-linux/lib64)
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case "${NATIVE}:${LIBPATH_SUFFIX}:${TOOL_LIB}" in
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:* | *::* | *:*:*${LIBPATH_SUFFIX}) ;;
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*) libs="${exec_prefix}/${target_alias}/lib${LIBPATH_SUFFIX}" ;;
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esac
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libs="${exec_prefix}/${TOOL_LIB}/lib ${libs}"
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fi
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append_to_lib_path ${libs}
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fi
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if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then
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libs=${NATIVE_LIB_DIRS}
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if [ "x${NATIVE}" = "xyes" ] ; then
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case " ${libs} " in
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*" ${libdir} "*) ;;
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*) libs="${libdir} ${libs}" ;;
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esac
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fi
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append_to_lib_path ${libs}
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fi
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case :${lib_path1}:${lib_path2}: in
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*:: | ::*) LIB_PATH=${lib_path1}${lib_path2} ;;
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*) LIB_PATH=${lib_path1}:${lib_path2} ;;
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esac
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LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
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# We need it for testsuite.
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set $EMULATION_LIBPATH
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if [ "x$1" = "x$EMULATION_NAME" ]; then
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test -d tmpdir || mkdir tmpdir
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rm -f tmpdir/libpath.exp
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echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
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fi
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# Generate 5 or 6 script files from a master script template in
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# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh. Which one of the 5 or 6
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# script files is actually used depends on command line options given
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# to ld. (SCRIPT_NAME was set in the emulparams_file.)
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#
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# A .x script file is the default script.
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# A .xr script is for linking without relocation (-r flag).
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# A .xu script is like .xr, but *do* create constructors (-Ur flag).
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# A .xn script is for linking with -n flag (mix text and data on same page).
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# A .xbn script is for linking with -N flag (mix text and data on same page).
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# A .xs script is for generating a shared library with the --shared
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# flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
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# emulation parameters.
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# A .xc script is for linking with -z combreloc; it is only generated if
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# $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
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# $SCRIPT_NAME is "elf".
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# A .xsc script is for linking with --shared -z combreloc; it is generated
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# if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
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# $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
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# parameters too.
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if [ "x$SCRIPT_NAME" = "xelf" ]; then
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GENERATE_COMBRELOC_SCRIPT=yes
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fi
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SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
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# Determine DATA_ALIGNMENT for the 5 variants, using
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# values specified in the emulparams/<script_to_run>.sh file or default.
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DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
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DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
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DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
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DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
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DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
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LD_FLAG=r
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DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
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DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
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( echo "/* Script for ld -r: link without relocation */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xr
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LD_FLAG=u
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DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
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CONSTRUCTING=" "
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( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xu
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LD_FLAG=
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DATA_ALIGNMENT=${DATA_ALIGNMENT_}
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RELOCATING=" "
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( echo "/* Default linker script, for normal executables */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.x
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LD_FLAG=n
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DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
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( echo "/* Script for -n: mix text and data on same page */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xn
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LD_FLAG=N
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DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
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( echo "/* Script for -N: mix text and data on same page; don't align data */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xbn
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if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
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DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
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LD_FLAG=c
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COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
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( echo "/* Script for -z combreloc: combine and sort reloc sections */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc
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rm -f ${COMBRELOC}
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LD_FLAG=w
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RELRO_NOW=" "
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COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp
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( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xw
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rm -f ${COMBRELOC}
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COMBRELOC=
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unset RELRO_NOW
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fi
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if test -n "$GENERATE_SHLIB_SCRIPT"; then
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LD_FLAG=shared
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DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
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CREATE_SHLIB=" "
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(
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echo "/* Script for ld --shared: link shared library */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xs
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if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
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LD_FLAG=cshared
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DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
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COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp
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( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc
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rm -f ${COMBRELOC}
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LD_FLAG=wshared
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RELRO_NOW=" "
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COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp
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( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsw
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rm -f ${COMBRELOC}
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COMBRELOC=
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unset RELRO_NOW
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fi
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unset CREATE_SHLIB
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fi
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if test -n "$GENERATE_PIE_SCRIPT"; then
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LD_FLAG=pie
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DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
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CREATE_PIE=" "
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(
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echo "/* Script for ld -pie: link position independent executable */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xd
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if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
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LD_FLAG=cpie
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DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
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COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp
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( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdc
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rm -f ${COMBRELOC}
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LD_FLAG=wpie
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RELRO_NOW=" "
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COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp
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( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xdw
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rm -f ${COMBRELOC}
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COMBRELOC=
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unset RELRO_NOW
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fi
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unset CREATE_PIE
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fi
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if test -n "$GENERATE_AUTO_IMPORT_SCRIPT"; then
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LD_FLAG=auto_import
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DATA_ALIGNMENT=${DATA_ALIGNMENT_}
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(
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echo "/* Script for ld --enable-auto-import: Like the default script except read only data is placed into .data */"
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. ${CUSTOMIZER_SCRIPT}
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. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
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) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xa
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fi
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case "$COMPILE_IN: $EMULATION_LIBPATH " in
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:*" ${EMULATION_NAME} "*) COMPILE_IN=yes;;
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esac
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# PR ld/5652:
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# Determine if the shell has support for the variable BASH_LINENO.
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# When it is the case, it is only available inside functions.
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has_lineno()
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{
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test "x$BASH_LINENO" != "x"
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}
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# Enable accruate error source in the compiler error messages, if possible.
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if has_lineno; then
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. ${srcdir}/genscrba.sh
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else
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source_em()
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{
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. $1
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}
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fragment()
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{
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cat >> e${EMULATION_NAME}.c
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}
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fi
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# Generate e${EMULATION_NAME}.c.
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# Start with an empty file, then the sourced .em script
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# can use the "fragment" function to append.
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> e${EMULATION_NAME}.c
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source_em ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
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