ld/genscripts.sh

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