ld-elf2flt.in

   1 #!/bin/sh
   2 #
   3 # allow us to do flat processing if the flag -Wl,-elf2flt or -elf2flt to
   4 # the 'C' compiler or linker respectively
   5 #
   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
   8 #
   9 # Copyright (C) 2002,2003 David McCullough <davidm@snapgear.com>
  10 # Copyright (C) 2000, Lineo. davidm@lineo.com
  11 #
  12
  13 LINKER="$0.real"            # the original renamed-linker
  14 ELF2FLT="`expr $0 : '\(.*\)ld'`elf2flt"
  15 TOOLDIR="`dirname $0`"      # let gcc find the tools for us
  16 LDSCRIPTPATH="${TOOLDIR}/../@target_alias@/lib"         # and the scripts
  17 SHARED_ID=""
  18 NEWLDSCRIPT=""
  19
  20 # check TOOLDIR from prefix/bin/ or prefix/target-alias/bin/
  21 [ -d "${TOOLDIR}/../@target_alias@/lib" ] || LDSCRIPTPATH="${TOOLDIR}/../lib"
  22
  23 #
  24 # if we have the elf2flt options, run it
  25 #
  26
  27 if expr "$*" : ".*-elf2flt.*" > /dev/null
  28 then
  29         ARG1=
  30         ARG2=
  31         OFILE="a.out"
  32         PIC=
  33         SDIRS=
  34         LDSCRIPT=
  35         FINAL="yes"
  36         FINAL_ONLY=
  37         MOVDAT=
  38         VERBOSE=
  39
  40         while [ $# -ne 0 ]
  41         do
  42                 case "$1" in
  43
  44                 -elf2flt) ;;                           # we already know this
  45                 -elf2flt*)FLTFLAGS="`expr \"$1\" : '-elf2flt=\(.*\)'` $FLTFLAGS";;
  46
  47                 -move-rodata)
  48                           MOVDAT="y";;                 # Put rodata in ROM if possible
  49
  50                 -shared-lib-id)
  51                           shift; SHARED_ID="$1";;      # Shared library ID
  52
  53                 -o)       shift; OFILE="$1";;          # the final outfile
  54                 -o*)      OFILE="`expr \"$1\" : '-o\(.*\)'`";;
  55
  56                 -T)       shift; LDSCRIPT="$1";;       # they have a linker script
  57                 -c)       shift; LDSCRIPT="$1";;
  58
  59                 -L)       ARG1="$ARG1 $1"              # remember search dirs
  60                           shift;
  61                                   ARG1="$ARG1 $1"
  62                                   SDIRS="$SDIRS -L$1"
  63                                   ;;
  64                 -L*)      ARG1="$ARG1 $1"; SDIRS="$SDIRS $1";;
  65
  66                 -EB)      ARG1="$ARG1 $1"; SDIRS="$SDIRS $1";; # arm big endian
  67
  68                 -relax)   ;;                           # eat this for microblaze
  69
  70                 -r|-Ur)   FINAL=""                     # this is not a final link
  71                           ARG1="$ARG1 $1"
  72                                   ;;
  73
  74                 -v)       ARG1="$ARG1 $1"
  75                                   VERBOSE="y"
  76                                   ;;
  77
  78                 -m)       shift; EMUL="-m $1";;        # ld emulations for h8300
  79                 -m*)      EMUL=$1;;
  80
  81                 *)        ARG1="$ARG1 $1"
  82                                   ;;
  83                 esac
  84                 shift
  85         done
  86
  87         if [ "$FINAL" = "yes" ]
  88         then
  89                 [ "$VERBOSE" = "y" ] && set -x
  90                 ARG1="$ARG1 $FINAL_ONLY"
  91                 NEWLDSCRIPT=`mktemp /tmp/flt-XXXXXX`
  92                 SEDOP=" -e s/^R_RODAT// -e /^W_RODAT/d"
  93                 if [ "$MOVDAT" ]
  94                 then
  95                         $LINKER -r -d -o "$OFILE.elf2flt" $ARG1  || exit $?
  96                         if [ "`@target_alias@-objdump -h "$OFILE.elf2flt" | \
  97                                         egrep -A1 '[.]rodata' | grep RELOC`" ]
  98                         then
  99                                 echo "warning: .rodata section contains relocations"
 100                         else
 101                                 SEDOP="-e /^R_RODAT/d -e s/^W_RODAT//"
 102                         fi
 103                 fi
 104                 if [ "$SHARED_ID" ]
 105                 then
 106                         # Massage the linker script into something useful.  These
 107                         # regexps are ugly due to some bizzare shell quoting rules.
 108                         #    SEDOP="$SEDOP -e \"s/ORIGIN = 0x0,/ORIGIN = 0x${SHARED_ID}000000,/\""
 109                         #    SEDOP="$SEDOP -e \"s/.text 0x0 :/.text 0x${SHARED_ID}000000 :/\""
 110                         SEDOP="$SEDOP -e s/\\(ORIGIN.=.0\\)x0,/\\1x${SHARED_ID}000000,/"
 111                         SEDOP="$SEDOP -e s/\\([.]text.0\\)x0[^0-9]:/\\1x${SHARED_ID}000000:/"
 112
 113                         if [ "$SHARED_ID" -gt 0 ]
 114                         then
 115                                 # Non application modules enter via main not _start
 116                                 #    SEDOP="$SEDOP -e 's/ENTRY (_start)/ENTRY (main)/'"
 117                                 SEDOP="$SEDOP -e s/\\(ENTRY.\\)(_start)/\1(lib_main)/"
 118                         fi
 119
 120                         # Provide the magic parameter that defines the library data segment pointer offset
 121                         case "@target_cpu@" in
 122                             h8300) GOT_OFFSET="__current_shared_library_er5_offset_";;
 123                             *)     GOT_OFFSET="_current_shared_library_a5_offset_";;
 124                         esac
 125                         ARG1="$ARG1 -defsym $GOT_OFFSET=`expr ${SHARED_ID} '*' -4 - 4`"
 126                 fi
 127
 128                 # provide a default linker script, we usually need one
 129                 [ -z "$LDSCRIPT" ] && LDSCRIPT="${LDSCRIPTPATH}/elf2flt.ld"
 130
 131                 # if we can find the linker script we preprocess it,  otherwise
 132                 # we assume the user knows what they are doing
 133                 if [ -f "$LDSCRIPT" ]; then
 134                         sed $SEDOP < "$LDSCRIPT" > "$NEWLDSCRIPT"
 135                         LDSCRIPT="$NEWLDSCRIPT"
 136                 elif [ -f "${LDSCRIPTPATH}/$LDSCRIPT" ]; then
 137                         sed $SEDOP < "${LDSCRIPTPATH}/$LDSCRIPT" > "$NEWLDSCRIPT"
 138                         LDSCRIPT="$NEWLDSCRIPT"
 139                 elif [ -f "${LDSCRIPTPATH}/ldscripts/$LDSCRIPT" ]; then
 140                         sed $SEDOP < "${LDSCRIPTPATH}/ldscripts/$LDSCRIPT" > "$NEWLDSCRIPT"
 141                         LDSCRIPT="$NEWLDSCRIPT"
 142                 fi
 143
 144                 if [ "@got_check@" = "no" ]
 145                 then
 146                  $LINKER $EMUL $SDIRS -T $LDSCRIPT -Ur -d -o "$OFILE.elf" $ARG1         ||exit $?
 147                  $LINKER $EMUL $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" $ARG1                ||exit $?
 148                 else
 149                  $LINKER $EMUL -r -d -o "$OFILE.elf2flt" $ARG1                          ||exit $?
 150                  $LINKER $EMUL $SDIRS -T $LDSCRIPT -Ur -o "$OFILE.elf" "$OFILE.elf2flt" ||exit $?
 151                  $LINKER $EMUL $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" "$OFILE.elf2flt"     ||exit $?
 152                  rm -f "$OFILE.elf2flt"
 153                 fi
 154                 if grep _GLOBAL_OFFSET_TABLE_ "$OFILE.gdb" > /dev/null
 155                 then
 156                         $ELF2FLT $FLTFLAGS -o "$OFILE" -p "$OFILE.gdb" "$OFILE.elf" || exit $?
 157                 else
 158                         $ELF2FLT $FLTFLAGS -o "$OFILE" -r "$OFILE.elf" || exit $?
 159                 fi
 160                 rm -f "$OFILE.elf"  # not needed for any reason
 161                 rm -f "$NEWLDSCRIPT"
 162                 exit 0
 163         fi
 164
 165         exec $LINKER -o "$OFILE" $ARG1
 166 fi
 167
 168 #
 169 # otherwise pretend we aren't here
 170 #
 171
 172 exec $LINKER "$@"