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
12 # This is Free Software, under the GNU Public Licence v2 or greater.
15 LINKER="$0.real" # the original renamed-linker
16 ELF2FLT="`expr $0 : '\(.*\)ld'`elf2flt"
17 NM="`expr $0 : '\(.*\)ld'`nm"
18 TOOLDIR="`dirname $0`" # let gcc find the tools for us
19 OBJCOPY="`expr $0 : '\(.*\)ld'`objcopy"
20 [ -f "$OBJCOPY" ] || OBJCOPY="$TOOLDIR/../../bin/@target_alias@-objcopy"
21 OBJDUMP="`expr $OBJCOPY : '\(.*\)objcopy'`objdump"
22 LDSCRIPTPATH="@binutils_ldscript_dir@" # and the scripts
27 # check TOOLDIR from prefix/bin/ or prefix/target-alias/bin/
28 [ -d "${LDSCRIPTPATH}" ] || LDSCRIPTPATH="${TOOLDIR}/../lib"
31 # if we have the elf2flt options, run it
34 if expr "$*" : ".*-elf2flt.*" > /dev/null
51 -elf2flt) ;; # we already know this
52 -elf2flt*)FLTFLAGS="`expr \"$1\" : '-elf2flt=\(.*\)'` $FLTFLAGS";;
55 MOVDAT="y";; # Put rodata in ROM if possible
56 -s) ;; # Ignore -s (strip)
59 shift; SHARED_ID="$1";; # Shared library ID
61 WANT_SHARED="y";; # Shared library
63 -o) shift; OFILE="$1";; # the final outfile
64 -o*) OFILE="`expr \"$1\" : '-o\(.*\)'`";;
66 -T) shift; LDSCRIPT="$1";; # they have a linker script
67 -c) shift; LDSCRIPT="$1";;
69 -L) ARG1="$ARG1 $1" # remember search dirs
74 -L*) ARG1="$ARG1 $1"; SDIRS="$SDIRS $1";;
76 -EB) ARG1="$ARG1 $1"; SDIRS="$SDIRS $1";; # arm big endian
78 -relax) ;; # eat this for microblaze
80 -r|-Ur) FINAL="" # this is not a final link
88 -m) shift; EMUL="-m $1";; # ld emulations for h8300
97 if [ "$WANT_SHARED" = "y" ]
99 if [ -z "$SHARED_ID" ]
101 echo "-shared used without passing a shared library ID"
105 if [ "$FINAL" = "yes" ]
107 [ "$VERBOSE" = "y" ] && set -x
108 ARG1="$ARG1 $FINAL_ONLY"
109 NEWLDSCRIPT=`mktemp /tmp/flt-XXXXXX`
110 trap 'rm -f "$NEWLDSCRIPT"' EXIT
111 SEDOP=" -e s/^R_RODAT// -e /^W_RODAT/d"
115 $LINKER -r -d -o "$OFILE.elf2flt" $ARG1 || exit $?
116 if [ "`$OBJDUMP -h "$OFILE.elf2flt" | \
117 egrep -A1 '[.]rodata' | grep RELOC`" ]
119 echo "warning: .rodata section contains relocations"
121 SEDOP="-e /^R_RODAT/d -e s/^W_RODAT//"
126 # Massage the linker script into something useful. These
127 # regexps are ugly due to some bizzare shell quoting rules.
128 # SEDOP="$SEDOP -e \"s/ORIGIN = 0x0,/ORIGIN = 0x${SHARED_ID}000000,/\""
129 # SEDOP="$SEDOP -e \"s/.text 0x0 :/.text 0x${SHARED_ID}000000 :/\""
130 SEDOP="$SEDOP -e s/\\(ORIGIN.=.0\\)x0,/\\1x${SHARED_ID}000000,/"
131 SEDOP="$SEDOP -e s/\\([.]text.0\\)x0[^0-9]:/\\1x${SHARED_ID}000000:/"
133 if [ "$SHARED_ID" -gt 0 ]
135 # Non application modules enter via main not _start
136 # SEDOP="$SEDOP -e 's/ENTRY (_start)/ENTRY (main)/'"
137 SEDOP="$SEDOP -e s/\\(ENTRY.\\)(@SYMBOL_PREFIX@_start)/\1(lib_main)/"
138 OBJCOPYOP="--localize-hidden --weaken"
141 # Provide the magic parameter that defines the library data segment pointer offset
143 case "@target_cpu@" in
144 bfin) GOT_OFFSET="_current_shared_library_p5_offset_" GOT_ADJ=1;;
145 h8300) GOT_OFFSET="__current_shared_library_er5_offset_";;
146 *) GOT_OFFSET="_current_shared_library_a5_offset_";;
148 ARG1="$ARG1 -defsym $GOT_OFFSET=`expr ${SHARED_ID} '*' -${GOT_ADJ} - ${GOT_ADJ}`"
150 if [ "@emit_relocs@" = "yes" ]
152 SEDOP="$SEDOP -e s/^SINGLE_LINK://"
154 SEDOP="$SEDOP -e /^SINGLE_LINK:/d"
156 if [ "@emit_ctor_dtor@" = "yes" ]
158 SEDOP="$SEDOP -e s/^TOR://"
160 SEDOP="$SEDOP -e /^TOR:/d"
163 # provide a default linker script, we usually need one
164 [ -z "$LDSCRIPT" ] && LDSCRIPT="${LDSCRIPTPATH}/elf2flt.ld"
166 # if we can find the linker script we preprocess it, otherwise
167 # we assume the user knows what they are doing
168 if [ -f "$LDSCRIPT" ]; then
169 sed $SEDOP < "$LDSCRIPT" > "$NEWLDSCRIPT"
170 LDSCRIPT="$NEWLDSCRIPT"
171 elif [ -f "${LDSCRIPTPATH}/$LDSCRIPT" ]; then
172 sed $SEDOP < "${LDSCRIPTPATH}/$LDSCRIPT" > "$NEWLDSCRIPT"
173 LDSCRIPT="$NEWLDSCRIPT"
174 elif [ -f "${LDSCRIPTPATH}/ldscripts/$LDSCRIPT" ]; then
175 sed $SEDOP < "${LDSCRIPTPATH}/ldscripts/$LDSCRIPT" > "$NEWLDSCRIPT"
176 LDSCRIPT="$NEWLDSCRIPT"
179 if [ "@emit_relocs@" = "yes" ]
181 $LINKER $EMUL $SDIRS -T $LDSCRIPT -q -o "$OFILE.gdb" $ARG1 ||exit $?
183 FLTFLAGS="$FLTFLAGS -a"
185 if [ "@got_check@" = "no" ]
187 $LINKER $EMUL $SDIRS -T $LDSCRIPT -Ur -d -o "$OFILE.elf" $ARG1 ||exit $?
188 $LINKER $EMUL $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" $ARG1 ||exit $?
190 $LINKER $EMUL -r -d -o "$OFILE.elf2flt" $ARG1 ||exit $?
191 $LINKER $EMUL $SDIRS -T $LDSCRIPT -Ur -o "$OFILE.elf" "$OFILE.elf2flt" ||exit $?
192 $LINKER $EMUL $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" "$OFILE.elf2flt" ||exit $?
193 rm -f "$OFILE.elf2flt"
197 if $NM "$OFILE.gdb" | grep _GLOBAL_OFFSET_TABLE_ > /dev/null
199 $ELF2FLT $FLTFLAGS -o "$OFILE" -p "$OFILE.gdb" "$RFILE" || exit $?
201 $ELF2FLT $FLTFLAGS -o "$OFILE" -r "$RFILE" || exit $?
205 if $OBJCOPY $OBJCOPYOP --help > /dev/null 2>&1
207 $OBJCOPY $OBJCOPYOP "$OFILE.gdb" ||exit $?
209 case " $OBJCOPYOP " in
210 *" --localize-hidden "*)
211 SYMS=`mktemp /tmp/flt-XXXXXX`
212 $OBJDUMP --syms "$OFILE.gdb" > "$SYMS" ||exit $?
213 sed -n 's/.*\(\.hidden\|\.internal\) \(.*\)/-L \2/p' < "$SYMS" > "$SYMS.hidden" ||exit $?
214 if [ -s "$SYMS.hidden" ]
216 xargs ${VERBOSE:+-t} $OBJCOPY "$OFILE.gdb" < "$SYMS.hidden" ||exit $?
218 rm -f "$SYMS" "$SYMS.hidden"
221 case " $OBJCOPYOP " in
223 $OBJCOPY --weaken "$OFILE.gdb" ||exit $?
228 [ "$RFILE" = "$OFILE.gdb" ] || rm -f "$RFILE" # not needed for any reason
232 exec $LINKER -o "$OFILE" $ARG1
236 # otherwise pretend we aren't here