3 # allow us to do flat processing if the flag -Wl,-elf2flt or -elf2flt to
4 # the 'C' compiler or linker respectively
6 # uses the env. var FLTFLAGS as extra parameters to pass to elf2flt
7 # arguments given like -Wl,-elf2flt="-b 10000 -v" are given before FLTFLAGS
9 # Copyright (C) 2002,2003 David McCullough <davidm@snapgear.com>
10 # Copyright (C) 2000, Lineo. davidm@lineo.com
13 LINKER="$0.real" # the original renamed-linker
14 ELF2FLT="`expr $0 : '\(.*\)ld'`elf2flt"
15 TOOLDIR="`dirname $0`" # let gcc find the tools for us
20 # if we have the elf2flt options, run it
23 if expr "$*" : ".*-elf2flt.*" > /dev/null
40 -elf2flt) ;; # we already know this
41 -elf2flt*)FLTFLAGS="`expr \"$1\" : '-elf2flt=\(.*\)'` $FLTFLAGS";;
44 MOVDAT="y";; # Put rodata in ROM if possible
47 shift; SHARED_ID="$1";; # Shared library ID
49 -o) shift; OFILE="$1";; # the final outfile
50 -o*) OFILE="`expr \"$1\" : '-o\(.*\)'`";;
52 -T) shift; LDSCRIPT="$1";; # they have a linker script
53 -c) shift; LDSCRIPT="$1";;
55 -L) ARG1="$ARG1 $1" # remember search dirs
60 -L*) ARG1="$ARG1 $1"; SDIRS="$SDIRS $1";;
62 -EB) ARG1="$ARG1 $1"; SDIRS="$SDIRS $1";; # arm big endian
64 -relax) ;; # eat this for microblaze
66 -r|-Ur) FINAL="" # this is not a final link
80 if [ "$FINAL" = "yes" ]
82 [ "$VERBOSE" = "y" ] && set -x
83 ARG1="$ARG1 $FINAL_ONLY"
84 NEWLDSCRIPT=`mktemp /tmp/flt-XXXXXX`
85 SEDOP=" -e s/^R_RODAT// -e /^W_RODAT/d"
88 $LINKER -r -d -o "$OFILE.elf2flt" $ARG1 || exit $?
89 if [ "`@target_alias@-objdump -h "$OFILE.elf2flt" | \
90 egrep -A1 '[.]rodata' | grep RELOC`" ]
92 echo "warning: .rodata section contains relocations"
94 SEDOP="-e /^R_RODAT/d -e s/^W_RODAT//"
99 # Massage the linker script into something useful. These
100 # regexps are ugly due to some bizzare shell quoting rules.
101 # SEDOP="$SEDOP -e \"s/ORIGIN = 0x0,/ORIGIN = 0x${SHARED_ID}000000,/\""
102 # SEDOP="$SEDOP -e \"s/.text 0x0 :/.text 0x${SHARED_ID}000000 :/\""
103 SEDOP="$SEDOP -e s/\\(ORIGIN.=.0\\)x0,/\\1x${SHARED_ID}000000,/"
104 SEDOP="$SEDOP -e s/\\([.]text.0\\)x0[^0-9]:/\\1x${SHARED_ID}000000:/"
106 if [ "$SHARED_ID" -gt 0 ]
108 # Non application modules enter via main not _start
109 # SEDOP="$SEDOP -e 's/ENTRY (_start)/ENTRY (main)/'"
110 SEDOP="$SEDOP -e s/\\(ENTRY.\\)(_start)/\1(lib_main)/"
113 # Provide the magic parameter that defines the library data segment pointer offset
114 ARG1="$ARG1 -defsym _current_shared_library_a5_offset_=`expr ${SHARED_ID} '*' -4 - 4`"
117 # provide a default linker script, we usually need one
118 [ -z "$LDSCRIPT" ] && LDSCRIPT="@prefix@/@target_alias@/lib/elf2flt.ld"
120 # if we can find the linker script we preprocess it, otherwise
121 # we assume the user knows what they are doing
122 if [ -f "$LDSCRIPT" ]; then
123 sed $SEDOP < "$LDSCRIPT" > "$NEWLDSCRIPT"
124 LDSCRIPT="$NEWLDSCRIPT"
125 elif [ -f "@prefix@/@target_alias@/lib/$LDSCRIPT" ]; then
126 sed $SEDOP < "@prefix@/@target_alias@/lib/$LDSCRIPT" > "$NEWLDSCRIPT"
127 LDSCRIPT="$NEWLDSCRIPT"
128 elif [ -f "@prefix@/@target_alias@/lib/ldscripts/$LDSCRIPT" ]; then
129 sed $SEDOP < "@prefix@/@target_alias@/lib/ldscripts/$LDSCRIPT" > "$NEWLDSCRIPT"
130 LDSCRIPT="$NEWLDSCRIPT"
133 if [ "@got_check@" = "no" ]
135 $LINKER $SDIRS -T $LDSCRIPT -Ur -d -o "$OFILE.elf" $ARG1 ||exit $?
136 $LINKER $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" $ARG1 ||exit $?
138 $LINKER -r -d -o "$OFILE.elf2flt" $ARG1 ||exit $?
139 $LINKER $SDIRS -T $LDSCRIPT -Ur -o "$OFILE.elf" "$OFILE.elf2flt" ||exit $?
140 $LINKER $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" "$OFILE.elf2flt" ||exit $?
141 rm -f "$OFILE.elf2flt"
143 if grep _GLOBAL_OFFSET_TABLE_ "$OFILE.gdb" > /dev/null
145 $ELF2FLT $FLTFLAGS -o "$OFILE" -p "$OFILE.gdb" "$OFILE.elf" || exit $?
147 $ELF2FLT $FLTFLAGS -o "$OFILE" -r "$OFILE.elf" || exit $?
149 rm -f "$OFILE.elf" # not needed for any reason
154 exec $LINKER -o "$OFILE" $ARG1
158 # otherwise pretend we aren't here