blob: b876636007ff38ab701ca2ed2a4b14438b5974ff (
plain) (
tree)
|
|
#!/bin/sh
#
# allow us to do flat processing if the flag -Wl,-elf2flt or -elf2flt to
# the 'C' compiler or linker respectively
#
# uses the env. var FLTFLAGS as extra parameters to pass to elf2flt
# arguments given like -Wl,-elf2flt="-b 10000 -v" are given before FLTFLAGS
#
# Copyright (C) 2002,2003 David McCullough <davidm@snapgear.com>
# Copyright (C) 2000, Lineo. davidm@lineo.com
#
# This is Free Software, under the GNU Public Licence v2 or greater.
#
LINKER="$0.real" # the original renamed-linker
ELF2FLT="`expr $0 : '\(.*\)ld'`elf2flt"
NM="`expr $0 : '\(.*\)ld'`nm"
TOOLDIR="`dirname $0`" # let gcc find the tools for us
OBJCOPY="`expr $0 : '\(.*\)ld'`objcopy"
[ -f "$OBJCOPY" ] || OBJCOPY="$TOOLDIR/../../bin/@target_alias@-objcopy"
OBJDUMP="`expr $OBJCOPY : '\(.*\)objcopy'`objdump"
LDSCRIPTPATH="@binutils_ldscript_dir@" # and the scripts
SHARED_ID=""
NEWLDSCRIPT=""
# check TOOLDIR from prefix/bin/ or prefix/target-alias/bin/
[ -d "${LDSCRIPTPATH}" ] || LDSCRIPTPATH="${TOOLDIR}/../lib"
#
# if we have the elf2flt options, run it
#
if expr "$*" : ".*-elf2flt.*" > /dev/null
then
ARG1=
ARG2=
OFILE="a.out"
PIC=
SDIRS=
LDSCRIPT=
FINAL="yes"
FINAL_ONLY=
MOVDAT=
VERBOSE=
while [ $# -ne 0 ]
do
case "$1" in
-elf2flt) ;; # we already know this
-elf2flt*)FLTFLAGS="`expr \"$1\" : '-elf2flt=\(.*\)'` $FLTFLAGS";;
-move-rodata)
MOVDAT="y";; # Put rodata in ROM if possible
-shared-lib-id)
shift; SHARED_ID="$1";; # Shared library ID
-o) shift; OFILE="$1";; # the final outfile
-o*) OFILE="`expr \"$1\" : '-o\(.*\)'`";;
-T) shift; LDSCRIPT="$1";; # they have a linker script
-c) shift; LDSCRIPT="$1";;
-L) ARG1="$ARG1 $1" # remember search dirs
shift;
ARG1="$ARG1 $1"
SDIRS="$SDIRS -L$1"
;;
-L*) ARG1="$ARG1 $1"; SDIRS="$SDIRS $1";;
-EB) ARG1="$ARG1 $1"; SDIRS="$SDIRS $1";; # arm big endian
-relax) ;; # eat this for microblaze
-r|-Ur) FINAL="" # this is not a final link
ARG1="$ARG1 $1"
;;
-v) ARG1="$ARG1 $1"
VERBOSE="y"
;;
-m) shift; EMUL="-m $1";; # ld emulations for h8300
-m*) EMUL=$1;;
*) ARG1="$ARG1 $1"
;;
esac
shift
done
if [ "$FINAL" = "yes" ]
then
[ "$VERBOSE" = "y" ] && set -x
ARG1="$ARG1 $FINAL_ONLY"
NEWLDSCRIPT=`mktemp /tmp/flt-XXXXXX`
SEDOP=" -e s/^R_RODAT// -e /^W_RODAT/d"
OBJCOPYOP=""
if [ "$MOVDAT" ]
then
$LINKER -r -d -o "$OFILE.elf2flt" $ARG1 || exit $?
if [ "`$OBJDUMP -h "$OFILE.elf2flt" | \
egrep -A1 '[.]rodata' | grep RELOC`" ]
then
echo "warning: .rodata section contains relocations"
else
SEDOP="-e /^R_RODAT/d -e s/^W_RODAT//"
fi
fi
if [ "$SHARED_ID" ]
then
# Massage the linker script into something useful. These
# regexps are ugly due to some bizzare shell quoting rules.
# SEDOP="$SEDOP -e \"s/ORIGIN = 0x0,/ORIGIN = 0x${SHARED_ID}000000,/\""
# SEDOP="$SEDOP -e \"s/.text 0x0 :/.text 0x${SHARED_ID}000000 :/\""
SEDOP="$SEDOP -e s/\\(ORIGIN.=.0\\)x0,/\\1x${SHARED_ID}000000,/"
SEDOP="$SEDOP -e s/\\([.]text.0\\)x0[^0-9]:/\\1x${SHARED_ID}000000:/"
if [ "$SHARED_ID" -gt 0 ]
then
# Non application modules enter via main not _start
# SEDOP="$SEDOP -e 's/ENTRY (_start)/ENTRY (main)/'"
SEDOP="$SEDOP -e s/\\(ENTRY.\\)(_start)/\1(lib_main)/"
OBJCOPYOP="--localize-hidden --weaken"
fi
# Provide the magic parameter that defines the library data segment pointer offset
case "@target_cpu@" in
h8300) GOT_OFFSET="__current_shared_library_er5_offset_";;
*) GOT_OFFSET="_current_shared_library_a5_offset_";;
esac
ARG1="$ARG1 -defsym $GOT_OFFSET=`expr ${SHARED_ID} '*' -4 - 4`"
fi
if [ "@emit_relocs@" = "yes" ]
then
SEDOP="$SEDOP -e s/^SINGLE_LINK://"
else
SEDOP="$SEDOP -e /^SINGLE_LINK:/d"
fi
# provide a default linker script, we usually need one
[ -z "$LDSCRIPT" ] && LDSCRIPT="${LDSCRIPTPATH}/elf2flt.ld"
# if we can find the linker script we preprocess it, otherwise
# we assume the user knows what they are doing
if [ -f "$LDSCRIPT" ]; then
sed $SEDOP < "$LDSCRIPT" > "$NEWLDSCRIPT"
LDSCRIPT="$NEWLDSCRIPT"
elif [ -f "${LDSCRIPTPATH}/$LDSCRIPT" ]; then
sed $SEDOP < "${LDSCRIPTPATH}/$LDSCRIPT" > "$NEWLDSCRIPT"
LDSCRIPT="$NEWLDSCRIPT"
elif [ -f "${LDSCRIPTPATH}/ldscripts/$LDSCRIPT" ]; then
sed $SEDOP < "${LDSCRIPTPATH}/ldscripts/$LDSCRIPT" > "$NEWLDSCRIPT"
LDSCRIPT="$NEWLDSCRIPT"
fi
if [ "@emit_relocs@" = "yes" ]
then
$LINKER $EMUL $SDIRS -T $LDSCRIPT -q -o "$OFILE.gdb" $ARG1 ||exit $?
RFILE="$OFILE.gdb"
FLTFLAGS="$FLTFLAGS -a"
else
if [ "@got_check@" = "no" ]
then
$LINKER $EMUL $SDIRS -T $LDSCRIPT -Ur -d -o "$OFILE.elf" $ARG1 ||exit $?
$LINKER $EMUL $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" $ARG1 ||exit $?
else
$LINKER $EMUL -r -d -o "$OFILE.elf2flt" $ARG1 ||exit $?
$LINKER $EMUL $SDIRS -T $LDSCRIPT -Ur -o "$OFILE.elf" "$OFILE.elf2flt" ||exit $?
$LINKER $EMUL $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" "$OFILE.elf2flt" ||exit $?
rm -f "$OFILE.elf2flt"
fi
RFILE="$OFILE.elf"
fi
if $NM "$OFILE.gdb" | grep _GLOBAL_OFFSET_TABLE_ > /dev/null
then
$ELF2FLT $FLTFLAGS -o "$OFILE" -p "$OFILE.gdb" "$RFILE" || exit $?
else
$ELF2FLT $FLTFLAGS -o "$OFILE" -r "$RFILE" || exit $?
fi
if [ "$OBJCOPYOP" ]
then
if $OBJCOPY $OBJCOPYOP --help > /dev/null 2>&1
then
$OBJCOPY $OBJCOPYOP "$OFILE.gdb" ||exit $?
else
case " $OBJCOPYOP " in
*" --localize-hidden "*)
SYMS=`mktemp /tmp/flt-XXXXXX`
$OBJDUMP --syms "$OFILE.gdb" > "$SYMS" ||exit $?
sed -n 's/.*\(\.hidden\|\.internal\) \(.*\)/-L \2/p' < "$SYMS" > "$SYMS.hidden" ||exit $?
if [ -s "$SYMS.hidden" ]
then
xargs ${VERBOSE:+-t} $OBJCOPY "$OFILE.gdb" < "$SYMS.hidden" ||exit $?
fi
rm -f "$SYMS" "$SYMS.hidden"
;;
esac
case " $OBJCOPYOP " in
*" --weaken "*)
$OBJCOPY --weaken "$OFILE.gdb" ||exit $?
;;
esac
fi
fi
[ "$RFILE" = "$OFILE.gdb" ] || rm -f "$RFILE" # not needed for any reason
rm -f "$NEWLDSCRIPT"
exit 0
fi
exec $LINKER -o "$OFILE" $ARG1
fi
#
# otherwise pretend we aren't here
#
exec $LINKER "$@"
|
