ld/genscripts.sh

   1 #!/bin/sh
   2 # genscripts.sh - generate the ld-emulation-target specific files
   3 #
   4 # Usage: genscripts.sh srcdir libdir exec_prefix \
   5 #        host target target_alias default_emulation \
   6 #        native_lib_dirs use_sysroot this_emulation tool_dir
   7 #
   8 # Sample usage:
   9 # genscripts.sh /djm/ld-devo/devo/ld /usr/local/lib /usr/local \
  10 #  sparc-sun-sunos4.1.3 sparc-sun-sunos4.1.3 sparc-sun-sunos4.1.3 sun4 \
  11 #  "" no sun3 sparc-sun-sunos4.1.3
  12 # produces sun3.x sun3.xbn sun3.xn sun3.xr sun3.xu em_sun3.c
  13
  14 srcdir=$1
  15 libdir=$2
  16 exec_prefix=$3
  17 host=$4
  18 target=$5
  19 target_alias=$6
  20 EMULATION_LIBPATH=$7
  21 NATIVE_LIB_DIRS=$8
  22 use_sysroot=$9
  23 shift 9
  24 EMULATION_NAME=$1
  25 shift
  26 # Can't use ${1:-$target_alias} here due to an Ultrix shell bug.
  27 if [ "x$1" = "x" ] ; then
  28   tool_lib=${exec_prefix}/${target_alias}/lib
  29 else
  30   tool_lib=${exec_prefix}/$1/lib
  31 fi
  32
  33 # Include the emulation-specific parameters:
  34 . ${srcdir}/emulparams/${EMULATION_NAME}.sh
  35
  36 if test -d ldscripts; then
  37   true
  38 else
  39   mkdir ldscripts
  40 fi
  41
  42 # Set some flags for the emultempl scripts.  USE_LIBPATH will
  43 # be set for any libpath-using emulation; NATIVE will be set for a
  44 # libpath-using emulation where ${host} = ${target}.  NATIVE
  45 # may already have been set by the emulparams file, but that's OK
  46 # (it'll just get set to "yes" twice).
  47
  48 case " $EMULATION_LIBPATH " in
  49   *" ${EMULATION_NAME} "*)
  50     if [ "x${host}" = "x${target}" ] ; then
  51       NATIVE=yes
  52       USE_LIBPATH=yes
  53     elif [ "x${use_sysroot}" = "xyes" ] ; then
  54       USE_LIBPATH=yes
  55     fi
  56     ;;
  57 esac
  58
  59 # If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also.
  60 if test "x$NATIVE" = "xyes" ; then
  61   USE_LIBPATH=yes
  62 fi
  63
  64 # Set the library search path, for libraries named by -lfoo.
  65 # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
  66 # Otherwise, the default is set here.
  67 #
  68 # The format is the usual list of colon-separated directories.
  69 # To force a logically empty LIB_PATH, do LIBPATH=":".
  70 #
  71 # If we are using a sysroot, prefix library paths with "=" to indicate this.
  72 #
  73 # If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of
  74 # the library path with the suffix applied.
  75
  76 if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then
  77   if [ x"$use_sysroot" != xyes ] ; then
  78     LIB_PATH=${libdir}
  79   fi
  80   LIB_PATH2=""
  81   for lib in ${NATIVE_LIB_DIRS}; do
  82     # The "=" is harmless if we aren't using a sysroot, but also needless.
  83     if [ "x${use_sysroot}" = "xyes" ] ; then
  84       lib="=${lib}"
  85     fi
  86     addsuffix=
  87     case "${LIBPATH_SUFFIX}:${lib}" in
  88       :*) ;;
  89       *:*${LIBPATH_SUFFIX}) ;;
  90       *) addsuffix=yes ;;
  91     esac
  92     if test -n "$addsuffix"; then
  93       case :${LIB_PATH}: in
  94         *:${lib}${LIBPATH_SUFFIX}:*) ;;
  95         ::) LIB_PATH=${lib}${LIBPATH_SUFFIX} ;;
  96         *) LIB_PATH=${LIB_PATH}:${lib}${LIBPATH_SUFFIX} ;;
  97       esac
  98       case :${LIB_PATH}${LIB_PATH2}: in
  99         *:${lib}:*) ;;
 100         *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
 101       esac
 102     else
 103       case :${LIB_PATH}: in
 104         *:${lib}:*) ;;
 105         ::) LIB_PATH=${lib} ;;
 106         *) LIB_PATH=${LIB_PATH}:${lib} ;;
 107       esac
 108     fi
 109   done
 110   LIB_PATH=${LIB_PATH}${LIB_PATH2}
 111 fi
 112
 113
 114 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
 115 # sysrooted configurations.
 116 if [ "x${use_sysroot}" != "xyes" ] ; then
 117   LIB_PATH=${tool_lib}:${LIB_PATH}
 118 fi
 119
 120 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
 121
 122 # Generate 5 or 6 script files from a master script template in
 123 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
 124 # script files is actually used depends on command line options given
 125 # to ld.  (SCRIPT_NAME was set in the emulparams_file.)
 126 #
 127 # A .x script file is the default script.
 128 # A .xr script is for linking without relocation (-r flag).
 129 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
 130 # A .xn script is for linking with -n flag (mix text and data on same page).
 131 # A .xbn script is for linking with -N flag (mix text and data on same page).
 132 # A .xs script is for generating a shared library with the --shared
 133 #   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
 134 #   emulation parameters.
 135 # A .xc script is for linking with -z combreloc; it is only generated if
 136 #   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 137 #   $SCRIPT_NAME is "elf".
 138 # A .xsc script is for linking with --shared -z combreloc; it is generated
 139 #   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 140 #   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
 141 #   parameters too.
 142
 143 if [ "x$SCRIPT_NAME" = "xelf" ]; then
 144   GENERATE_COMBRELOC_SCRIPT=yes
 145 fi
 146
 147 SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
 148
 149 # Determine DATA_ALIGNMENT for the 5 variants, using
 150 # values specified in the emulparams/<emulation>.sh file or default.
 151
 152 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
 153 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
 154 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
 155 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
 156 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
 157
 158 LD_FLAG=r
 159 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
 160 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
 161 ( echo "/* Script for ld -r: link without relocation */"
 162   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 163   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 164 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xr
 165
 166 LD_FLAG=u
 167 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
 168 CONSTRUCTING=" "
 169 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
 170   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 171   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 172 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xu
 173
 174 LD_FLAG=
 175 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 176 RELOCATING=" "
 177 ( echo "/* Default linker script, for normal executables */"
 178   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 179   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 180 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.x
 181
 182 LD_FLAG=n
 183 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
 184 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
 185 ( echo "/* Script for -n: mix text and data on same page */"
 186   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 187   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 188 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xn
 189
 190 LD_FLAG=N
 191 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
 192 ( echo "/* Script for -N: mix text and data on same page; don't align data */"
 193   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 194   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 195 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xbn
 196
 197 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 198   DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
 199   LD_FLAG=c
 200   COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 201   ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
 202     . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 203     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 204   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xc
 205   rm -f ${COMBRELOC}
 206   COMBRELOC=
 207 fi
 208
 209 if test -n "$GENERATE_SHLIB_SCRIPT"; then
 210   LD_FLAG=shared
 211   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 212   CREATE_SHLIB=" "
 213   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 214   (
 215     echo "/* Script for ld --shared: link shared library */"
 216     . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 217     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 218   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xs
 219   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 220     LD_FLAG=cshared
 221     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 222     COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 223     ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
 224       . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 225       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 226     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xsc
 227     rm -f ${COMBRELOC}
 228     COMBRELOC=
 229   fi
 230 fi
 231
 232 case " $EMULATION_LIBPATH " in
 233     *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
 234 esac
 235
 236 # Generate e${EMULATION_NAME}.c.
 237 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em