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|
#!/bin/sh
# genscripts.sh - generate the ld-emulation-target specific files
#
# Usage: genscripts.sh srcdir libdir exec_prefix \
# host target target_alias default_emulation \
# native_lib_dirs this_emulation tool_dir
#
# Sample usage:
# genscripts.sh /djm/ld-devo/devo/ld /usr/local/lib /usr/local \
# 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
srcdir=$1
libdir=$2
exec_prefix=$3
host=$4
target=$5
target_alias=$6
EMULATION_LIBPATH=$7
NATIVE_LIB_DIRS=$8
EMULATION_NAME=$9
shift 9
# Can't use ${1:-$target_alias} here due to an Ultrix shell bug.
if [ "x$1" = "x" ] ; then
tool_lib=${exec_prefix}/${target_alias}/lib
else
tool_lib=${exec_prefix}/$1/lib
fi
# Include the emulation-specific parameters:
. ${srcdir}/emulparams/${EMULATION_NAME}.sh
if test -d ldscripts; then
true
else
mkdir ldscripts
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 [ "x${LIB_PATH}" = "x" ] ; then
if [ "x${host}" = "x${target}" ] ; then
case " $EMULATION_LIBPATH " in
*" ${EMULATION_NAME} "*)
# Native, and default or emulation requesting LIB_PATH.
LIB_PATH=${libdir}
for lib in ${NATIVE_LIB_DIRS}; do
case :${LIB_PATH}: in
*:${lib}:*) ;;
*) LIB_PATH=${LIB_PATH}:${lib} ;;
esac
done
esac
fi
fi
# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib.
LIB_PATH=${tool_lib}:${LIB_PATH}
LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
# 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=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
# Determine DATA_ALIGNMENT for the 5 variants, using
# values specified in the emulparams/<emulation>.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 */"
. ${srcdir}/emulparams/${EMULATION_NAME}.sh
. ${srcdir}/scripttempl/${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 */"
. ${srcdir}/emulparams/${EMULATION_NAME}.sh
. ${srcdir}/scripttempl/${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 */"
. ${srcdir}/emulparams/${EMULATION_NAME}.sh
. ${srcdir}/scripttempl/${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 */"
. ${srcdir}/emulparams/${EMULATION_NAME}.sh
. ${srcdir}/scripttempl/${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 */"
. ${srcdir}/emulparams/${EMULATION_NAME}.sh
. ${srcdir}/scripttempl/${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 */"
. ${srcdir}/emulparams/${EMULATION_NAME}.sh
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xc
rm -f ${COMBRELOC}
COMBRELOC=
fi
if test -n "$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 */"
. ${srcdir}/emulparams/${EMULATION_NAME}.sh
. ${srcdir}/scripttempl/${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}.xc.tmp
( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
. ${srcdir}/emulparams/${EMULATION_NAME}.sh
. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
) | sed -e '/^ *$/d;s/[ ]*$//' > ldscripts/${EMULATION_NAME}.xsc
rm -f ${COMBRELOC}
COMBRELOC=
fi
fi
case " $EMULATION_LIBPATH " in
*" ${EMULATION_NAME} "*) COMPILE_IN=true;;
esac
# Generate e${EMULATION_NAME}.c.
. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
|
