| #!/bin/sh |
| # genscripts.sh - generate the ld-emulation-target specific files |
| # Copyright 2007 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 \ |
| # 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"] |
| # |
| # 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 |
| 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: |
| . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME} |
| |
| 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$NATIVE" = "xyes" ; then |
| USE_LIBPATH=yes |
| fi |
| |
| # Set the library search path, for libraries named by -lfoo. |
| # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used. |
| # Otherwise, the default is set here. |
| # |
| # The format is the usual list of colon-separated directories. |
| # To force a logically empty LIB_PATH, do LIBPATH=":". |
| # |
| # If we are using a sysroot, prefix library paths with "=" to indicate this. |
| # |
| # If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of |
| # the library path with the suffix applied. |
| |
| if [ "x${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 $(tooldir)/lib, aka /usr/local/TARGET/lib, except for |
| # sysrooted configurations and when LIBPATH=":". |
| if [ "x${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} | 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} ${EMULATION_NAME} |
| . ${srcdir}/scripttempl/${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} ${EMULATION_NAME} |
| . ${srcdir}/scripttempl/${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} ${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}} |
| ( 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} |
| ( 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. |
| ( |
| 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 ${COMBRELOC} |
| COMBRELOC= |
| unset RELRO_NOW |
| fi |
| unset CREATE_SHLIB |
| fi |
| |
| if test -n "$GENERATE_PIE_SCRIPT"; then |
| LD_FLAG=pie |
| DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}} |
| CREATE_PIE=" " |
| # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR. |
| ( |
| 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${EMULATION_NAME}.c. |
| # Start with an empty file, then the sourced .em script |
| # can use the "fragment" function to append. |
| > e${EMULATION_NAME}.c |
| source_em ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em |