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${USE_LIBPATH}" = xyes ] ; then
 130   LIB_PATH2=
 131
 132   libs=${NATIVE_LIB_DIRS}
 133   if [ "x${use_sysroot}" != "xyes" ] ; then
 134     case " ${libs} " in
 135       *" ${libdir} "*) ;;
 136       *) libs="${libdir} ${libs}" ;;
 137     esac
 138     case " ${libs} " in
 139       *" ${tool_lib} "*) ;;
 140       *) libs="${tool_lib} ${libs}" ;;
 141     esac
 142   fi
 143
 144   for lib in ${libs}; do
 145     # The "=" is harmless if we aren't using a sysroot, but also needless.
 146     if [ "x${use_sysroot}" = "xyes" ] ; then
 147       lib="=${lib}"
 148     fi
 149     addsuffix=
 150     case "${LIBPATH_SUFFIX}:${lib}" in
 151       :*) ;;
 152       *:*${LIBPATH_SUFFIX}) ;;
 153       *) addsuffix=yes ;;
 154     esac
 155     if test -n "$addsuffix"; then
 156       case :${LIB_PATH}: in
 157         *:${lib}${LIBPATH_SUFFIX}:*) ;;
 158         ::) LIB_PATH=${lib}${LIBPATH_SUFFIX} ;;
 159         *) LIB_PATH=${LIB_PATH}:${lib}${LIBPATH_SUFFIX} ;;
 160       esac
 161       case :${LIB_PATH}:${LIB_PATH2}: in
 162         *:${lib}:*) ;;
 163         *::) LIB_PATH2=${lib} ;;
 164         *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
 165       esac
 166     else
 167       case :${LIB_PATH2}: in
 168         *:${lib}:*) ;;
 169         ::) LIB_PATH2=${lib} ;;
 170         *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
 171       esac
 172     fi
 173   done
 174
 175   case :${LIB_PATH}:${LIB_PATH2}: in
 176     *:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;;
 177     *) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;;
 178   esac
 179 fi
 180
 181 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
 182 # sysrooted configurations and when LIBPATH=":".
 183 if [ "x${use_sysroot}" != "xyes" ] ; then
 184   case :${LIB_PATH}: in
 185   ::: | *:${tool_lib}:*) ;;
 186   ::) LIB_PATH=${tool_lib} ;;
 187   *) LIB_PATH=${tool_lib}:${LIB_PATH} ;;
 188   esac
 189 fi
 190
 191 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
 192
 193 # We need it for testsuite.
 194 set $EMULATION_LIBPATH
 195 if [ "x$1" = "x$EMULATION_NAME" ]; then
 196     test -d tmpdir || mkdir tmpdir
 197     rm -f tmpdir/libpath.exp
 198     echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
 199 fi
 200
 201 # Generate 5 or 6 script files from a master script template in
 202 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
 203 # script files is actually used depends on command line options given
 204 # to ld.  (SCRIPT_NAME was set in the emulparams_file.)
 205 #
 206 # A .x script file is the default script.
 207 # A .xr script is for linking without relocation (-r flag).
 208 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
 209 # A .xn script is for linking with -n flag (mix text and data on same page).
 210 # A .xbn script is for linking with -N flag (mix text and data on same page).
 211 # A .xs script is for generating a shared library with the --shared
 212 #   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
 213 #   emulation parameters.
 214 # A .xc script is for linking with -z combreloc; it is only generated if
 215 #   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 216 #   $SCRIPT_NAME is "elf".
 217 # A .xsc script is for linking with --shared -z combreloc; it is generated
 218 #   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 219 #   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
 220 #   parameters too.
 221
 222 if [ "x$SCRIPT_NAME" = "xelf" ]; then
 223   GENERATE_COMBRELOC_SCRIPT=yes
 224 fi
 225
 226 SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
 227
 228 # Determine DATA_ALIGNMENT for the 5 variants, using
 229 # values specified in the emulparams/<script_to_run>.sh file or default.
 230
 231 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
 232 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
 233 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
 234 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
 235 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
 236
 237 LD_FLAG=r
 238 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
 239 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
 240 ( echo "/* Script for ld -r: link without relocation */"
 241   . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 242   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 243 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xr
 244
 245 LD_FLAG=u
 246 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
 247 CONSTRUCTING=" "
 248 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
 249   . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 250   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 251 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xu
 252
 253 LD_FLAG=
 254 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 255 RELOCATING=" "
 256 ( echo "/* Default linker script, for normal executables */"
 257   . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 258   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 259 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.x
 260
 261 LD_FLAG=n
 262 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
 263 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
 264 ( echo "/* Script for -n: mix text and data on same page */"
 265   . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 266   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 267 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xn
 268
 269 LD_FLAG=N
 270 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
 271 ( echo "/* Script for -N: mix text and data on same page; don't align data */"
 272   . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 273   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 274 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xbn
 275
 276 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 277   DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
 278   LD_FLAG=c
 279   COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 280   ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
 281     . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 282     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 283   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xc
 284   rm -f ${COMBRELOC}
 285   LD_FLAG=w
 286   RELRO_NOW=" "
 287   COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp
 288   ( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */"
 289     . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 290     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 291   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xw
 292   rm -f ${COMBRELOC}
 293   COMBRELOC=
 294   unset RELRO_NOW
 295 fi
 296
 297 if test -n "$GENERATE_SHLIB_SCRIPT"; then
 298   LD_FLAG=shared
 299   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 300   CREATE_SHLIB=" "
 301   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 302   (
 303     echo "/* Script for ld --shared: link shared library */"
 304     . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 305     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 306   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xs
 307   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 308     LD_FLAG=cshared
 309     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 310     COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp
 311     ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
 312       . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 313       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 314     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xsc
 315     rm -f ${COMBRELOC}
 316     LD_FLAG=wshared
 317     RELRO_NOW=" "
 318     COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp
 319     ( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */"
 320       . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 321       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 322     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xsw
 323     rm -f ${COMBRELOC}
 324     COMBRELOC=
 325     unset RELRO_NOW
 326   fi
 327   unset CREATE_SHLIB
 328 fi
 329
 330 if test -n "$GENERATE_PIE_SCRIPT"; then
 331   LD_FLAG=pie
 332   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 333   CREATE_PIE=" "
 334   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 335   (
 336     echo "/* Script for ld -pie: link position independent executable */"
 337     . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 338     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 339   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xd
 340   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 341     LD_FLAG=cpie
 342     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 343     COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp
 344     ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
 345       . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 346       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 347     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xdc
 348     rm -f ${COMBRELOC}
 349     LD_FLAG=wpie
 350     RELRO_NOW=" "
 351     COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp
 352     ( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */"
 353       . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 354       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 355     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xdw
 356     rm -f ${COMBRELOC}
 357     COMBRELOC=
 358     unset RELRO_NOW
 359   fi
 360   unset CREATE_PIE
 361 fi
 362
 363 case " $EMULATION_LIBPATH " in
 364     *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
 365 esac
 366
 367 # Generate e${EMULATION_NAME}.c.
 368 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em