ld/genscripts_extra.sh

   1 #!/bin/sh
   2 # genscripts_extra.sh - A copy of genscripts.sh with the ability to accept
   3 #  a second optional parameter - the name of the script to run in order to
   4 #  customise the linker scripts generated for a particular emulation.
   5 #  This allows targets with large numbers of similar emulations to only
   6 #  have one script to customise them all.
   7 #
   8 # Usage: genscripts_extra.sh \
   9 #          srcdir \
  10 #          libdir \
  11 #          exec_prefix \
  12 #          host \
  13 #          target \
  14 #          target_alias \
  15 #          default_emulation \
  16 #          native_lib_dirs \
  17 #          use_sysroot \
  18 #          this_emulation
  19 # optional:
  20 #          tool_dir
  21 #          customizer_script
  22 #
  23 # Sample usage:
  24 #
  25 #   genscripts_extra.sh \
  26 #    /sources/ld \
  27 #    /usr/local/lib \
  28 #    /usr/local \
  29 #    sparc-sun-sunos4.1.3 \
  30 #    sparc-sun-sunos4.1.3 \
  31 #    sparc-sun-sunos4.1.3 \
  32 #    sun4 \
  33 #    "" \
  34 #    no \
  35 #    sun3 \
  36 #    sparc-sun-sunos4.1.3
  37 #    sparc.sh
  38 #
  39 # produces the linker scripts:
  40 #
  41 #   sun3.x       [default linker script]
  42 #   sun3.xbn     [used when the linker is invoked with "-N"]
  43 #   sun3.xn      [used when the linker is invoked with "-n"]
  44 #   sun3.xr      [used when the linker is invoked with "-r"]
  45 #   sun3.xu      [used when the linker is invoked with "-Ur"]
  46 # and maybe:
  47 #   sun3.xc      [used when the linker is invoked with "-z combreloc"]
  48 #   sun3.xsc     [used when the linker is invoked with "--shared"]
  49 #   sun3.xdc     [used when the linker is invoked with "-pie"]
  50 #
  51 # It also produced the C source file:
  52 #
  53 #   em_sun3.c
  54 #
  55 # which is then compiled into the linker.
  56 #
  57 # The linker scripts are created by running the shell script
  58 # /sources/ld/emulparams/sparc.sh to set the value of ${SCRIPT_NAME}
  59 # (and any other variables it wants to).  ${SCRIPT_NAME} is then
  60 # invoked with a variable called ${LD_FLAG} to tell it which version
  61 # of the linker script to create.
  62
  63
  64 srcdir=$1
  65 libdir=$2
  66 exec_prefix=$3
  67 host=$4
  68 target=$5
  69 target_alias=$6
  70 EMULATION_LIBPATH=$7
  71 NATIVE_LIB_DIRS=$8
  72 use_sysroot=$9
  73 shift 9
  74 EMULATION_NAME=$1
  75 TOOL_LIB=$2
  76 CUSTOMIZER_SCRIPT=$3
  77 shift
  78 # Can't use ${1:-$target_alias} here due to an Ultrix shell bug.
  79 if [ "x$TOOL_LIB" = "x" ] ; then
  80   tool_lib=${exec_prefix}/${target_alias}/lib
  81 else
  82   tool_lib=${exec_prefix}/$TOOL_LIB/lib
  83 fi
  84
  85 if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then
  86   CUSTOMIZER_SCRIPT=${EMULATION_NAME}
  87 fi
  88
  89 # Include the emulation-specific parameters:
  90 . ${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh ${EMULATION_NAME}
  91
  92 if test -d ldscripts; then
  93   true
  94 else
  95   mkdir ldscripts
  96 fi
  97
  98 # Set some flags for the emultempl scripts.  USE_LIBPATH will
  99 # be set for any libpath-using emulation; NATIVE will be set for a
 100 # libpath-using emulation where ${host} = ${target}.  NATIVE
 101 # may already have been set by the emulparams file, but that's OK
 102 # (it'll just get set to "yes" twice).
 103
 104 case " $EMULATION_LIBPATH " in
 105   *" ${EMULATION_NAME} "*)
 106     if [ "x${host}" = "x${target}" ] ; then
 107       NATIVE=yes
 108       USE_LIBPATH=yes
 109     elif [ "x${use_sysroot}" = "xyes" ] ; then
 110       USE_LIBPATH=yes
 111     fi
 112     ;;
 113 esac
 114
 115 # If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also.
 116 if test "x$NATIVE" = "xyes" ; then
 117   USE_LIBPATH=yes
 118 fi
 119
 120 # Set the library search path, for libraries named by -lfoo.
 121 # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
 122 # Otherwise, the default is set here.
 123 #
 124 # The format is the usual list of colon-separated directories.
 125 # To force a logically empty LIB_PATH, do LIBPATH=":".
 126 #
 127 # If we are using a sysroot, prefix library paths with "=" to indicate this.
 128 #
 129 # If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of
 130 # the library path with the suffix applied.
 131
 132 if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then
 133   LIB_PATH2=
 134   if [ x"$use_sysroot" != xyes ] ; then
 135     LIB_PATH2=${libdir}
 136   fi
 137   for lib in ${NATIVE_LIB_DIRS}; do
 138     # The "=" is harmless if we aren't using a sysroot, but also needless.
 139     if [ "x${use_sysroot}" = "xyes" ] ; then
 140       lib="=${lib}"
 141     fi
 142     addsuffix=
 143     case "${LIBPATH_SUFFIX}:${lib}" in
 144       :*) ;;
 145       *:*${LIBPATH_SUFFIX}) ;;
 146       *) addsuffix=yes ;;
 147     esac
 148     if test -n "$addsuffix"; then
 149       case :${LIB_PATH}: in
 150         *:${lib}${LIBPATH_SUFFIX}:*) ;;
 151         ::) LIB_PATH=${lib}${LIBPATH_SUFFIX} ;;
 152         *) LIB_PATH=${LIB_PATH}:${lib}${LIBPATH_SUFFIX} ;;
 153       esac
 154       case :${LIB_PATH}:${LIB_PATH2}: in
 155         *:${lib}:*) ;;
 156         *::) LIB_PATH2=${lib} ;;
 157         *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
 158       esac
 159     else
 160       case :${LIB_PATH2}: in
 161         *:${lib}:*) ;;
 162         ::) LIB_PATH2=${lib} ;;
 163         *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
 164       esac
 165     fi
 166   done
 167   case :${LIB_PATH}:${LIB_PATH2}: in
 168     *:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;;
 169     *) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;;
 170   esac
 171 fi
 172
 173
 174 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
 175 # sysrooted configurations and when LIBPATH=":".
 176 if [ "x${use_sysroot}" != "xyes" ] ; then
 177   case :${LIB_PATH}: in
 178   ::: | *:${tool_lib}:*) ;;
 179   ::) LIB_PATH=${tool_lib} ;;
 180   *) LIB_PATH=${tool_lib}:${LIB_PATH} ;;
 181   esac
 182 fi
 183
 184 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
 185
 186 # We need it for testsuite.
 187 case " $EMULATION_LIBPATH " in
 188   *" ${EMULATION_NAME} "*)
 189     test -d tmpdir || mkdir tmpdir
 190     test -f tmpdir/libpath.exp || \
 191     echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
 192     ;;
 193 esac
 194
 195 # Generate 5 or 6 script files from a master script template in
 196 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
 197 # script files is actually used depends on command line options given
 198 # to ld.  (SCRIPT_NAME was set in the emulparams_file.)
 199 #
 200 # A .x script file is the default script.
 201 # A .xr script is for linking without relocation (-r flag).
 202 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
 203 # A .xn script is for linking with -n flag (mix text and data on same page).
 204 # A .xbn script is for linking with -N flag (mix text and data on same page).
 205 # A .xs script is for generating a shared library with the --shared
 206 #   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
 207 #   emulation parameters.
 208 # A .xc script is for linking with -z combreloc; it is only generated if
 209 #   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 210 #   $SCRIPT_NAME is "elf".
 211 # A .xsc script is for linking with --shared -z combreloc; it is generated
 212 #   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 213 #   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
 214 #   parameters too.
 215
 216 if [ "x$SCRIPT_NAME" = "xelf" ]; then
 217   GENERATE_COMBRELOC_SCRIPT=yes
 218 fi
 219
 220 SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
 221
 222 # Determine DATA_ALIGNMENT for the 5 variants, using
 223 # values specified in the emulparams/<script_to_run>.sh file or default.
 224
 225 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
 226 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
 227 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
 228 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
 229 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
 230
 231 LD_FLAG=r
 232 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
 233 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
 234 ( echo "/* Script for ld -r: link without relocation */"
 235   . ${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh ${EMULATION_NAME}
 236   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 237 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xr
 238
 239 LD_FLAG=u
 240 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
 241 CONSTRUCTING=" "
 242 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
 243   . ${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh ${EMULATION_NAME}
 244   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 245 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xu
 246
 247 LD_FLAG=
 248 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 249 RELOCATING=" "
 250 ( echo "/* Default linker script, for normal executables */"
 251   . ${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh ${EMULATION_NAME}
 252   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 253 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.x
 254
 255 LD_FLAG=n
 256 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
 257 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
 258 ( echo "/* Script for -n: mix text and data on same page */"
 259   . ${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh ${EMULATION_NAME}
 260   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 261 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xn
 262
 263 LD_FLAG=N
 264 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
 265 ( echo "/* Script for -N: mix text and data on same page; don't align data */"
 266   . ${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh ${EMULATION_NAME}
 267   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 268 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xbn
 269
 270 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 271   DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
 272   LD_FLAG=c
 273   COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 274   ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
 275     . ${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh ${EMULATION_NAME}
 276     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 277   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xc
 278   rm -f ${COMBRELOC}
 279   COMBRELOC=
 280 fi
 281
 282 if test -n "$GENERATE_SHLIB_SCRIPT"; then
 283   LD_FLAG=shared
 284   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 285   CREATE_SHLIB=" "
 286   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 287   (
 288     echo "/* Script for ld --shared: link shared library */"
 289     . ${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh ${EMULATION_NAME}
 290     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 291   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xs
 292   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 293     LD_FLAG=cshared
 294     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 295     COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 296     ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
 297       . ${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh ${EMULATION_NAME}
 298       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 299     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xsc
 300     rm -f ${COMBRELOC}
 301     COMBRELOC=
 302   fi
 303   unset CREATE_SHLIB
 304 fi
 305
 306 if test -n "$GENERATE_PIE_SCRIPT"; then
 307   LD_FLAG=pie
 308   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 309   CREATE_PIE=" "
 310   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 311   (
 312     echo "/* Script for ld -pie: link position independent executable */"
 313     . ${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh ${EMULATION_NAME}
 314     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 315   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xd
 316   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 317     LD_FLAG=cpie
 318     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 319     COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 320     ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
 321       . ${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh ${EMULATION_NAME}
 322       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 323     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xdc
 324     rm -f ${COMBRELOC}
 325     COMBRELOC=
 326   fi
 327   unset CREATE_PIE
 328 fi
 329
 330 case " $EMULATION_LIBPATH " in
 331     *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
 332 esac
 333
 334 # Generate e${EMULATION_NAME}.c.
 335 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em