ld/genscripts.sh

   1 #!/bin/sh
   2 # genscripts.sh - generate the ld-emulation-target specific files
   3 # Copyright 2004, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
   4 #
   5 # This file is part of the Gnu Linker.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3, or (at your option)
  10 # any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with GLD; see the file COPYING.  If not, write to the Free
  19 # Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  20 # 02110-1301, USA.
  21 #
  22 # Usage: genscripts_extra.sh \
  23 #          srcdir \
  24 #          libdir \
  25 #          prefix \
  26 #          exec_prefix \
  27 #          host \
  28 #          target \
  29 #          target_alias \
  30 #          default_emulation \
  31 #          native_lib_dirs \
  32 #          use_sysroot \
  33 #          enable_initfini_array \
  34 #          this_emulation \
  35 # optional:
  36 #          tool_dir \
  37 #          customizer_script
  38 #
  39 # Sample usage:
  40 #
  41 #   genscripts_extra.sh \
  42 #    /sources/ld \
  43 #    /usr/local/lib \
  44 #    /usr/local \
  45 #    /usr/local \
  46 #    sparc-sun-sunos4.1.3 \
  47 #    sparc-sun-sunos4.1.3 \
  48 #    sparc-sun-sunos4.1.3 \
  49 #    sun4 \
  50 #    "" \
  51 #    no \
  52 #    sun3 \
  53 #    sparc-sun-sunos4.1.3 \
  54 #    sparc.sh
  55 #
  56 # produces the linker scripts:
  57 #
  58 #   sun3.x       [default linker script]
  59 #   sun3.xbn     [used when the linker is invoked with "-N"]
  60 #   sun3.xn      [used when the linker is invoked with "-n"]
  61 #   sun3.xr      [used when the linker is invoked with "-r"]
  62 #   sun3.xu      [used when the linker is invoked with "-Ur"]
  63 # and maybe:
  64 #   sun3.xc      [used when the linker is invoked with "-z combreloc"]
  65 #   sun3.xsc     [used when the linker is invoked with "--shared"]
  66 #   sun3.xdc     [used when the linker is invoked with "-pie"]
  67 #   sun3.xa      [used when the linker is invoked with "--enable-auto-import"]
  68 #
  69 # It also produced the C source file:
  70 #
  71 #   em_sun3.c
  72 #
  73 # which is then compiled into the linker.
  74 #
  75 # The linker scripts are created by running the shell script
  76 # /sources/ld/emulparams/sparc.sh to set the value of ${SCRIPT_NAME}
  77 # (and any other variables it wants to).  ${SCRIPT_NAME} is then
  78 # invoked with a variable called ${LD_FLAG} to tell it which version
  79 # of the linker script to create.
  80
  81
  82 srcdir=$1
  83 libdir=$2
  84 prefix=$3
  85 exec_prefix=$4
  86 host=$5
  87 target=$6
  88 target_alias=$7
  89 EMULATION_LIBPATH=$8
  90 NATIVE_LIB_DIRS=$9
  91 shift 9
  92 use_sysroot=$1
  93 ENABLE_INITFINI_ARRAY=$2
  94 EMULATION_NAME=$3
  95 TOOL_LIB=$4
  96 CUSTOMIZER_SCRIPT=$5
  97
  98 # Can't use ${TOOL_LIB:-$target_alias} here due to an Ultrix shell bug.
  99 if [ "x${TOOL_LIB}" = "x" ] ; then
 100   tool_lib=${exec_prefix}/${target_alias}/lib
 101 else
 102   tool_lib=${exec_prefix}/${TOOL_LIB}/lib
 103 fi
 104
 105 if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then
 106   CUSTOMIZER_SCRIPT=${EMULATION_NAME}
 107 fi
 108 CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh"
 109
 110 # Include the emulation-specific parameters:
 111 . ${CUSTOMIZER_SCRIPT}
 112
 113 if test -d ldscripts; then
 114   true
 115 else
 116   mkdir ldscripts
 117 fi
 118
 119 # Set some flags for the emultempl scripts.  USE_LIBPATH will
 120 # be set for any libpath-using emulation; NATIVE will be set for a
 121 # libpath-using emulation where ${host} = ${target}.  NATIVE
 122 # may already have been set by the emulparams file, but that's OK
 123 # (it'll just get set to "yes" twice).
 124
 125 case " $EMULATION_LIBPATH " in
 126   *" ${EMULATION_NAME} "*)
 127     if [ "x${host}" = "x${target}" ] ; then
 128       NATIVE=yes
 129       USE_LIBPATH=yes
 130     elif [ "x${use_sysroot}" = "xyes" ] ; then
 131       USE_LIBPATH=yes
 132     fi
 133     ;;
 134 esac
 135
 136 # If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also.
 137 if test "x$NATIVE" = "xyes" ; then
 138   USE_LIBPATH=yes
 139 fi
 140
 141 # Set the library search path, for libraries named by -lfoo.
 142 # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
 143 # Otherwise, the default is set here.
 144 #
 145 # The format is the usual list of colon-separated directories.
 146 # To force a logically empty LIB_PATH, do LIBPATH=":".
 147 #
 148 # If we are using a sysroot, prefix library paths with "=" to indicate this.
 149 #
 150 # If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of
 151 # the library path with the suffix applied.
 152
 153 if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then
 154   LIB_PATH2=
 155
 156   libs=${NATIVE_LIB_DIRS}
 157   if [ "x${use_sysroot}" != "xyes" ] ; then
 158     case " ${libs} " in
 159       *" ${libdir} "*) ;;
 160       *) libs="${libdir} ${libs}" ;;
 161     esac
 162     case " ${libs} " in
 163       *" ${tool_lib} "*) ;;
 164       *) libs="${tool_lib} ${libs}" ;;
 165     esac
 166   fi
 167
 168   for lib in ${libs}; do
 169     # The "=" is harmless if we aren't using a sysroot, but also needless.
 170     if [ "x${use_sysroot}" = "xyes" ] ; then
 171       lib="=${lib}"
 172     fi
 173     addsuffix=
 174     case "${LIBPATH_SUFFIX}:${lib}" in
 175       :*) ;;
 176       *:*${LIBPATH_SUFFIX}) ;;
 177       *) addsuffix=yes ;;
 178     esac
 179     if test -n "$addsuffix"; then
 180       case :${LIB_PATH}: in
 181         *:${lib}${LIBPATH_SUFFIX}:*) ;;
 182         ::) LIB_PATH=${lib}${LIBPATH_SUFFIX} ;;
 183         *) LIB_PATH=${LIB_PATH}:${lib}${LIBPATH_SUFFIX} ;;
 184       esac
 185       case :${LIB_PATH}:${LIB_PATH2}: in
 186         *:${lib}:*) ;;
 187         *::) LIB_PATH2=${lib} ;;
 188         *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
 189       esac
 190     else
 191       case :${LIB_PATH2}: in
 192         *:${lib}:*) ;;
 193         ::) LIB_PATH2=${lib} ;;
 194         *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
 195       esac
 196     fi
 197   done
 198
 199   case :${LIB_PATH}:${LIB_PATH2}: in
 200     *:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;;
 201     *) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;;
 202   esac
 203
 204   # For multilib'ed targets, ensure both ${target_alias}/lib${LIBPATH_SUFFIX}
 205   # and ${TOOL_LIB}/lib${LIBPATH_SUFFIX} are in the default search path, because
 206   # 64bit libraries may be in both places, depending on cross-development
 207   # setup method (e.g.: /usr/s390x-linux/lib64 vs /usr/s390-linux/lib64)
 208   case "${LIBPATH_SUFFIX}:${tool_lib}" in
 209     :*) ;;
 210     *:*${LIBPATH_SUFFIX}) ;;
 211     *)
 212       paths="${exec_prefix}/${target_alias}/lib${LIBPATH_SUFFIX}"
 213       if [ x"${TOOL_LIB}" != x ]; then
 214         paths="${paths} ${exec_prefix}/${TOOL_LIB}/lib${LIBPATH_SUFFIX}"
 215       fi
 216       for path in $paths; do
 217         case :${LIB_PATH}: in
 218           ::: | *:${path}:*) ;;
 219           *) LIB_PATH=${path}:${LIB_PATH} ;;
 220         esac
 221       done
 222     ;;
 223   esac
 224 fi
 225
 226 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
 227 # sysrooted configurations and when LIBPATH=":".
 228 if [ "x${use_sysroot}" != "xyes" ] ; then
 229   case :${LIB_PATH}: in
 230   ::: | *:${tool_lib}:*) ;;
 231   ::) LIB_PATH=${tool_lib} ;;
 232   *) LIB_PATH=${tool_lib}:${LIB_PATH} ;;
 233   esac
 234   # For multilib targets, search both $tool_lib dirs
 235   if [ "x${LIBPATH_SUFFIX}" != "x" ] ; then
 236     case :${LIB_PATH}: in
 237       ::: | *:${tool_lib}${LIBPATH_SUFFIX}:*) ;;
 238       ::) LIB_PATH=${tool_lib}${LIBPATH_SUFFIX} ;;
 239       *) LIB_PATH=${tool_lib}${LIBPATH_SUFFIX}:${LIB_PATH} ;;
 240     esac
 241   fi
 242 fi
 243
 244 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
 245
 246 # We need it for testsuite.
 247 set $EMULATION_LIBPATH
 248 if [ "x$1" = "x$EMULATION_NAME" ]; then
 249     test -d tmpdir || mkdir tmpdir
 250     rm -f tmpdir/libpath.exp
 251     echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
 252 fi
 253
 254 # Generate 5 or 6 script files from a master script template in
 255 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
 256 # script files is actually used depends on command line options given
 257 # to ld.  (SCRIPT_NAME was set in the emulparams_file.)
 258 #
 259 # A .x script file is the default script.
 260 # A .xr script is for linking without relocation (-r flag).
 261 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
 262 # A .xn script is for linking with -n flag (mix text and data on same page).
 263 # A .xbn script is for linking with -N flag (mix text and data on same page).
 264 # A .xs script is for generating a shared library with the --shared
 265 #   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
 266 #   emulation parameters.
 267 # A .xc script is for linking with -z combreloc; it is only generated if
 268 #   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 269 #   $SCRIPT_NAME is "elf".
 270 # A .xsc script is for linking with --shared -z combreloc; it is generated
 271 #   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 272 #   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
 273 #   parameters too.
 274
 275 if [ "x$SCRIPT_NAME" = "xelf" ]; then
 276   GENERATE_COMBRELOC_SCRIPT=yes
 277 fi
 278
 279 SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
 280
 281 # Determine DATA_ALIGNMENT for the 5 variants, using
 282 # values specified in the emulparams/<script_to_run>.sh file or default.
 283
 284 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
 285 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
 286 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
 287 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
 288 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
 289
 290 LD_FLAG=r
 291 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
 292 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
 293 ( echo "/* Script for ld -r: link without relocation */"
 294   . ${CUSTOMIZER_SCRIPT}
 295   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 296 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xr
 297
 298 LD_FLAG=u
 299 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
 300 CONSTRUCTING=" "
 301 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
 302   . ${CUSTOMIZER_SCRIPT}
 303   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 304 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xu
 305
 306 LD_FLAG=
 307 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 308 RELOCATING=" "
 309 ( echo "/* Default linker script, for normal executables */"
 310   . ${CUSTOMIZER_SCRIPT}
 311   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 312 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.x
 313
 314 LD_FLAG=n
 315 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
 316 ( echo "/* Script for -n: mix text and data on same page */"
 317   . ${CUSTOMIZER_SCRIPT}
 318   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 319 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xn
 320
 321 LD_FLAG=N
 322 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
 323 ( echo "/* Script for -N: mix text and data on same page; don't align data */"
 324   . ${CUSTOMIZER_SCRIPT}
 325   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 326 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xbn
 327
 328 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 329   DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
 330   LD_FLAG=c
 331   COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 332   ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
 333     . ${CUSTOMIZER_SCRIPT}
 334     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 335   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xc
 336   rm -f ${COMBRELOC}
 337   LD_FLAG=w
 338   RELRO_NOW=" "
 339   COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp
 340   ( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */"
 341     . ${CUSTOMIZER_SCRIPT}
 342     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 343   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xw
 344   rm -f ${COMBRELOC}
 345   COMBRELOC=
 346   unset RELRO_NOW
 347 fi
 348
 349 if test -n "$GENERATE_SHLIB_SCRIPT"; then
 350   LD_FLAG=shared
 351   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 352   CREATE_SHLIB=" "
 353   (
 354     echo "/* Script for ld --shared: link shared library */"
 355     . ${CUSTOMIZER_SCRIPT}
 356     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 357   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xs
 358   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 359     LD_FLAG=cshared
 360     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 361     COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp
 362     ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
 363       . ${CUSTOMIZER_SCRIPT}
 364       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 365     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xsc
 366     rm -f ${COMBRELOC}
 367     LD_FLAG=wshared
 368     RELRO_NOW=" "
 369     COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp
 370     ( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */"
 371       . ${CUSTOMIZER_SCRIPT}
 372       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 373     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xsw
 374     rm -f ${COMBRELOC}
 375     COMBRELOC=
 376     unset RELRO_NOW
 377   fi
 378   unset CREATE_SHLIB
 379 fi
 380
 381 if test -n "$GENERATE_PIE_SCRIPT"; then
 382   LD_FLAG=pie
 383   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 384   CREATE_PIE=" "
 385   (
 386     echo "/* Script for ld -pie: link position independent executable */"
 387     . ${CUSTOMIZER_SCRIPT}
 388     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 389   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xd
 390   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 391     LD_FLAG=cpie
 392     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 393     COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp
 394     ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
 395       . ${CUSTOMIZER_SCRIPT}
 396       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 397     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xdc
 398     rm -f ${COMBRELOC}
 399     LD_FLAG=wpie
 400     RELRO_NOW=" "
 401     COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp
 402     ( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */"
 403       . ${CUSTOMIZER_SCRIPT}
 404       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 405     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xdw
 406     rm -f ${COMBRELOC}
 407     COMBRELOC=
 408     unset RELRO_NOW
 409   fi
 410   unset CREATE_PIE
 411 fi
 412
 413 if test -n "$GENERATE_AUTO_IMPORT_SCRIPT"; then
 414   LD_FLAG=auto_import
 415   DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 416   (
 417     echo "/* Script for ld --enable-auto-import: Like the default script except read only data is placed into .data  */"
 418     . ${CUSTOMIZER_SCRIPT}
 419     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 420   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xa
 421 fi
 422
 423 case " $EMULATION_LIBPATH " in
 424     *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
 425 esac
 426
 427 # PR ld/5652:
 428 # Determine if the shell has support for the variable BASH_LINENO.
 429 # When it is the case, it is only available inside functions.
 430 has_lineno()
 431 {
 432   test "x$BASH_LINENO" != "x"
 433 }
 434
 435 # Enable accruate error source in the compiler error messages, if possible.
 436 if has_lineno; then
 437   . ${srcdir}/genscrba.sh
 438 else
 439   source_em()
 440   {
 441     . $1
 442   }
 443   fragment()
 444   {
 445     cat >> e${EMULATION_NAME}.c
 446   }
 447 fi
 448
 449 # Generate e${EMULATION_NAME}.c.
 450 # Start with an empty file, then the sourced .em script
 451 # can use the "fragment" function to append.
 452 > e${EMULATION_NAME}.c
 453 source_em ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em