mirror of
https://github.com/autc04/Retro68.git
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242 lines
6.9 KiB
Plaintext
242 lines
6.9 KiB
Plaintext
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#!/bin/sh
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#
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# allow us to do flat processing if the flag -Wl,-elf2flt or -elf2flt to
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# the 'C' compiler or linker respectively
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#
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# uses the env. var FLTFLAGS as extra parameters to pass to elf2flt
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# arguments given like -Wl,-elf2flt="-b 10000 -v" are given before FLTFLAGS
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#
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# Copyright (C) 2002,2003 David McCullough <davidm@snapgear.com>
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# Copyright (C) 2000, Lineo. davidm@lineo.com
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#
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# This is Free Software, under the GNU Public Licence v2 or greater.
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#
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LINKER="$0.real" # the original renamed-linker
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ELF2FLT="`expr $0 : '\(.*\)ld'`elf2flt"
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NM="`expr $0 : '\(.*\)ld'`nm"
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TOOLDIR="`dirname $0`" # let gcc find the tools for us
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OBJCOPY="`expr $0 : '\(.*\)ld'`objcopy"
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[ -f "$OBJCOPY" ] || OBJCOPY="$TOOLDIR/../../bin/@target_alias@-objcopy"
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OBJDUMP="`expr $OBJCOPY : '\(.*\)objcopy'`objdump"
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LDSCRIPTPATH="@binutils_ldscript_dir@" # and the scripts
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SHARED_ID=""
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NEWLDSCRIPT=""
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WANT_SHARED=""
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# check TOOLDIR from prefix/bin/ or prefix/target-alias/bin/
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[ -d "${LDSCRIPTPATH}" ] || LDSCRIPTPATH="${TOOLDIR}/../lib"
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#
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# if we have the elf2flt options, run it
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#
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if expr "$*" : ".*-elf2flt.*" > /dev/null
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then
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ARG1=
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ARG2=
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OFILE="a.out"
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PIC=
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SDIRS=
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LDSCRIPT=
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FINAL="yes"
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FINAL_ONLY=
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MOVDAT=
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VERBOSE=
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while [ $# -ne 0 ]
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do
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case "$1" in
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-elf2flt) ;; # we already know this
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-elf2flt*)FLTFLAGS="`expr \"$1\" : '-elf2flt=\(.*\)'` $FLTFLAGS";;
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-move-rodata)
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MOVDAT="y";; # Put rodata in ROM if possible
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-s|-S|--strip-all|--strip-debug)
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;; # Ignore strip flags
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-shared-lib-id)
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shift; SHARED_ID="$1";; # Shared library ID
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-shared|-G)
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WANT_SHARED="y";; # Shared library
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-o) shift; OFILE="$1";; # the final outfile
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-o*) OFILE="`expr \"$1\" : '-o\(.*\)'`";;
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-T) shift; LDSCRIPT="$1";; # they have a linker script
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-c) shift; LDSCRIPT="$1";;
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-L) ARG1="$ARG1 $1" # remember search dirs
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shift;
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ARG1="$ARG1 $1"
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SDIRS="$SDIRS -L$1"
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;;
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-L*) ARG1="$ARG1 $1"; SDIRS="$SDIRS $1";;
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-EB) ARG1="$ARG1 $1"; SDIRS="$SDIRS $1";; # arm big endian
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-relax) ;; # eat this for microblaze
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-r|-Ur) FINAL="" # this is not a final link
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ARG1="$ARG1 $1"
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;;
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-v|--verbose)
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ARG1="$ARG1 $1"
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VERBOSE="y"
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;;
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-m) shift; EMUL="-m $1";; # ld emulations for h8300
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-m*) EMUL=$1;;
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*) ARG1="$ARG1 $1"
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;;
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esac
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shift
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done
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if [ "$WANT_SHARED" = "y" ]
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then
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if [ -z "$SHARED_ID" ]
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then
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echo "-shared used without passing a shared library ID"
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exit 1
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fi
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fi
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if [ "$FINAL" = "yes" ]
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then
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[ "$VERBOSE" = "y" ] && set -x
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ARG1="$ARG1 $FINAL_ONLY"
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NEWLDSCRIPT=`mktemp /tmp/flt-XXXXXX`
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trap 'rm -f "$NEWLDSCRIPT"' EXIT
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SEDOP=" -e s/^R_RODAT// -e /^W_RODAT/d"
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OBJCOPYOP=""
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if [ "$MOVDAT" ]
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then
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$LINKER -r -d -o "$OFILE.elf2flt" $ARG1 || exit $?
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if [ "`$OBJDUMP -h "$OFILE.elf2flt" | \
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egrep -A1 '[.]rodata' | grep RELOC`" ]
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then
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echo "warning: .rodata section contains relocations"
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else
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SEDOP="-e /^R_RODAT/d -e s/^W_RODAT//"
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fi
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fi
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if [ "$SHARED_ID" ]
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then
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# Massage the linker script into something useful. These
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# regexps are ugly due to some bizzare shell quoting rules.
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# SEDOP="$SEDOP -e \"s/ORIGIN = 0x0,/ORIGIN = 0x${SHARED_ID}000000,/\""
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# SEDOP="$SEDOP -e \"s/.text 0x0 :/.text 0x${SHARED_ID}000000 :/\""
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SEDOP="$SEDOP -e s/\\(ORIGIN.=.0\\)x0,/\\1x${SHARED_ID}000000,/"
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SEDOP="$SEDOP -e s/\\([.]text.0\\)x0[^0-9]:/\\1x${SHARED_ID}000000:/"
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if [ "$SHARED_ID" -gt 0 ]
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then
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# Non application modules enter via main not _start
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# SEDOP="$SEDOP -e 's/ENTRY (_start)/ENTRY (main)/'"
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SEDOP="$SEDOP -e s/\\(ENTRY.\\)(@SYMBOL_PREFIX@_start)/\1(lib_main)/"
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OBJCOPYOP="--localize-hidden --weaken"
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fi
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# Provide the magic parameter that defines the library data segment pointer offset
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GOT_ADJ=4
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case "@target_cpu@" in
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bfin) GOT_OFFSET="_current_shared_library_p5_offset_" GOT_ADJ=1;;
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h8300) GOT_OFFSET="__current_shared_library_er5_offset_";;
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*) GOT_OFFSET="_current_shared_library_a5_offset_";;
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esac
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ARG1="$ARG1 -defsym $GOT_OFFSET=`expr ${SHARED_ID} '*' -${GOT_ADJ} - ${GOT_ADJ}`"
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fi
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if [ "@emit_relocs@" = "1" ]
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then
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SEDOP="$SEDOP -e s/^SINGLE_LINK://"
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else
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SEDOP="$SEDOP -e /^SINGLE_LINK:/d"
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fi
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if [ "@emit_ctor_dtor@" = "1" ]
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then
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SEDOP="$SEDOP -e s/^TOR://"
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else
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SEDOP="$SEDOP -e /^TOR:/d"
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fi
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# provide a default linker script, we usually need one
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[ -z "$LDSCRIPT" ] && LDSCRIPT="${LDSCRIPTPATH}/elf2flt.ld"
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# if we can find the linker script we preprocess it, otherwise
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# we assume the user knows what they are doing
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if [ -f "$LDSCRIPT" ]; then
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sed $SEDOP < "$LDSCRIPT" > "$NEWLDSCRIPT"
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LDSCRIPT="$NEWLDSCRIPT"
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elif [ -f "${LDSCRIPTPATH}/$LDSCRIPT" ]; then
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sed $SEDOP < "${LDSCRIPTPATH}/$LDSCRIPT" > "$NEWLDSCRIPT"
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LDSCRIPT="$NEWLDSCRIPT"
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elif [ -f "${LDSCRIPTPATH}/ldscripts/$LDSCRIPT" ]; then
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sed $SEDOP < "${LDSCRIPTPATH}/ldscripts/$LDSCRIPT" > "$NEWLDSCRIPT"
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LDSCRIPT="$NEWLDSCRIPT"
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fi
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if [ "@emit_relocs@" = "1" ]
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then
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$LINKER $EMUL $SDIRS -T $LDSCRIPT -q -o "$OFILE.gdb" $ARG1 ||exit $?
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RFILE="$OFILE.gdb"
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FLTFLAGS="$FLTFLAGS -a"
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else
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if [ "@got_check@" = "0" ]
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then
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$LINKER $EMUL $SDIRS -T $LDSCRIPT -Ur -d -o "$OFILE.elf" $ARG1 ||exit $?
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$LINKER $EMUL $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" $ARG1 ||exit $?
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else
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$LINKER $EMUL -r -d -o "$OFILE.elf2flt" $ARG1 ||exit $?
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$LINKER $EMUL $SDIRS -T $LDSCRIPT -Ur -o "$OFILE.elf" "$OFILE.elf2flt" ||exit $?
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$LINKER $EMUL $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" "$OFILE.elf2flt" ||exit $?
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rm -f "$OFILE.elf2flt"
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fi
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RFILE="$OFILE.elf"
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fi
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if $NM "$OFILE.gdb" | grep _GLOBAL_OFFSET_TABLE_ > /dev/null
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then
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$ELF2FLT $FLTFLAGS -o "$OFILE" -p "$OFILE.gdb" "$RFILE" || exit $?
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else
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$ELF2FLT $FLTFLAGS -o "$OFILE" -r "$RFILE" || exit $?
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fi
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if [ "$OBJCOPYOP" ]
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then
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if $OBJCOPY $OBJCOPYOP --help > /dev/null 2>&1
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then
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$OBJCOPY $OBJCOPYOP "$OFILE.gdb" ||exit $?
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else
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case " $OBJCOPYOP " in
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*" --localize-hidden "*)
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SYMS=`mktemp /tmp/flt-XXXXXX`
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$OBJDUMP --syms "$OFILE.gdb" > "$SYMS" ||exit $?
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sed -n 's/.*\(\.hidden\|\.internal\) \(.*\)/-L \2/p' < "$SYMS" > "$SYMS.hidden" ||exit $?
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if [ -s "$SYMS.hidden" ]
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then
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xargs ${VERBOSE:+-t} $OBJCOPY "$OFILE.gdb" < "$SYMS.hidden" ||exit $?
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fi
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rm -f "$SYMS" "$SYMS.hidden"
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;;
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esac
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case " $OBJCOPYOP " in
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*" --weaken "*)
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$OBJCOPY --weaken "$OFILE.gdb" ||exit $?
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;;
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esac
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fi
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fi
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[ "$RFILE" = "$OFILE.gdb" ] || rm -f "$RFILE" # not needed for any reason
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exit 0
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fi
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exec $LINKER -o "$OFILE" $ARG1
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fi
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#
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# otherwise pretend we aren't here
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#
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exec $LINKER "$@"
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