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 #          prefix \
   8 #          exec_prefix \
   9 #          host \
  10 #          target \
  11 #          target_alias \
  12 #          default_emulation \
  13 #          native_lib_dirs \
  14 #          use_sysroot \
  15 #          this_emulation \
  16 # optional:
  17 #          tool_dir \
  18 #          customizer_script
  19 #
  20 # Sample usage:
  21 #
  22 #   genscripts_extra.sh \
  23 #    /sources/ld \
  24 #    /usr/local/lib \
  25 #    /usr/local \
  26 #    /usr/local \
  27 #    sparc-sun-sunos4.1.3 \
  28 #    sparc-sun-sunos4.1.3 \
  29 #    sparc-sun-sunos4.1.3 \
  30 #    sun4 \
  31 #    "" \
  32 #    no \
  33 #    sun3 \
  34 #    sparc-sun-sunos4.1.3 \
  35 #    sparc.sh
  36 #
  37 # produces the linker scripts:
  38 #
  39 #   sun3.x       [default linker script]
  40 #   sun3.xbn     [used when the linker is invoked with "-N"]
  41 #   sun3.xn      [used when the linker is invoked with "-n"]
  42 #   sun3.xr      [used when the linker is invoked with "-r"]
  43 #   sun3.xu      [used when the linker is invoked with "-Ur"]
  44 # and maybe:
  45 #   sun3.xc      [used when the linker is invoked with "-z combreloc"]
  46 #   sun3.xsc     [used when the linker is invoked with "--shared"]
  47 #   sun3.xdc     [used when the linker is invoked with "-pie"]
  48 #
  49 # It also produced the C source file:
  50 #
  51 #   em_sun3.c
  52 #
  53 # which is then compiled into the linker.
  54 #
  55 # The linker scripts are created by running the shell script
  56 # /sources/ld/emulparams/sparc.sh to set the value of ${SCRIPT_NAME}
  57 # (and any other variables it wants to).  ${SCRIPT_NAME} is then
  58 # invoked with a variable called ${LD_FLAG} to tell it which version
  59 # of the linker script to create.
  60
  61
  62 srcdir=$1
  63 libdir=$2
  64 prefix=$3
  65 exec_prefix=$4
  66 host=$5
  67 target=$6
  68 target_alias=$7
  69 EMULATION_LIBPATH=$8
  70 NATIVE_LIB_DIRS=$9
  71 shift 9
  72 use_sysroot=$1
  73 EMULATION_NAME=$2
  74 TOOL_LIB=$3
  75 CUSTOMIZER_SCRIPT=$4
  76
  77 # Can't use ${TOOL_LIB:-$target_alias} here due to an Ultrix shell bug.
  78 if [ "x${TOOL_LIB}" = "x" ] ; then
  79   tool_lib=${exec_prefix}/${target_alias}/lib
  80 else
  81   tool_lib=${exec_prefix}/${TOOL_LIB}/lib
  82 fi
  83
  84 if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then
  85   CUSTOMIZER_SCRIPT=${EMULATION_NAME}
  86 fi
  87 CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh"
  88
  89 # Include the emulation-specific parameters:
  90 . ${CUSTOMIZER_SCRIPT} ${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${USE_LIBPATH}" = xyes ] ; then
 133   LIB_PATH2=
 134
 135   libs=${NATIVE_LIB_DIRS}
 136   if [ "x${use_sysroot}" != "xyes" ] ; then
 137     case " ${libs} " in
 138       *" ${libdir} "*) ;;
 139       *) libs="${libdir} ${libs}" ;;
 140     esac
 141     case " ${libs} " in
 142       *" ${tool_lib} "*) ;;
 143       *) libs="${tool_lib} ${libs}" ;;
 144     esac
 145   fi
 146
 147   for lib in ${libs}; do
 148     # The "=" is harmless if we aren't using a sysroot, but also needless.
 149     if [ "x${use_sysroot}" = "xyes" ] ; then
 150       lib="=${lib}"
 151     fi
 152     addsuffix=
 153     case "${LIBPATH_SUFFIX}:${lib}" in
 154       :*) ;;
 155       *:*${LIBPATH_SUFFIX}) ;;
 156       *) addsuffix=yes ;;
 157     esac
 158     if test -n "$addsuffix"; then
 159       case :${LIB_PATH}: in
 160         *:${lib}${LIBPATH_SUFFIX}:*) ;;
 161         ::) LIB_PATH=${lib}${LIBPATH_SUFFIX} ;;
 162         *) LIB_PATH=${LIB_PATH}:${lib}${LIBPATH_SUFFIX} ;;
 163       esac
 164       case :${LIB_PATH}:${LIB_PATH2}: in
 165         *:${lib}:*) ;;
 166         *::) LIB_PATH2=${lib} ;;
 167         *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
 168       esac
 169     else
 170       case :${LIB_PATH2}: in
 171         *:${lib}:*) ;;
 172         ::) LIB_PATH2=${lib} ;;
 173         *) LIB_PATH2=${LIB_PATH2}:${lib} ;;
 174       esac
 175     fi
 176   done
 177
 178   case :${LIB_PATH}:${LIB_PATH2}: in
 179     *:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;;
 180     *) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;;
 181   esac
 182 fi
 183
 184 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
 185 # sysrooted configurations and when LIBPATH=":".
 186 if [ "x${use_sysroot}" != "xyes" ] ; then
 187   case :${LIB_PATH}: in
 188   ::: | *:${tool_lib}:*) ;;
 189   ::) LIB_PATH=${tool_lib} ;;
 190   *) LIB_PATH=${tool_lib}:${LIB_PATH} ;;
 191   esac
 192 fi
 193
 194 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
 195
 196 # We need it for testsuite.
 197 set $EMULATION_LIBPATH
 198 if [ "x$1" = "x$EMULATION_NAME" ]; then
 199     test -d tmpdir || mkdir tmpdir
 200     rm -f tmpdir/libpath.exp
 201     echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
 202 fi
 203
 204 # Generate 5 or 6 script files from a master script template in
 205 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
 206 # script files is actually used depends on command line options given
 207 # to ld.  (SCRIPT_NAME was set in the emulparams_file.)
 208 #
 209 # A .x script file is the default script.
 210 # A .xr script is for linking without relocation (-r flag).
 211 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
 212 # A .xn script is for linking with -n flag (mix text and data on same page).
 213 # A .xbn script is for linking with -N flag (mix text and data on same page).
 214 # A .xs script is for generating a shared library with the --shared
 215 #   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
 216 #   emulation parameters.
 217 # A .xc script is for linking with -z combreloc; it is only generated if
 218 #   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 219 #   $SCRIPT_NAME is "elf".
 220 # A .xsc script is for linking with --shared -z combreloc; it is generated
 221 #   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 222 #   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
 223 #   parameters too.
 224
 225 if [ "x$SCRIPT_NAME" = "xelf" ]; then
 226   GENERATE_COMBRELOC_SCRIPT=yes
 227 fi
 228
 229 SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
 230
 231 # Determine DATA_ALIGNMENT for the 5 variants, using
 232 # values specified in the emulparams/<script_to_run>.sh file or default.
 233
 234 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
 235 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
 236 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
 237 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
 238 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
 239
 240 LD_FLAG=r
 241 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
 242 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
 243 ( echo "/* Script for ld -r: link without relocation */"
 244   . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 245   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 246 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xr
 247
 248 LD_FLAG=u
 249 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
 250 CONSTRUCTING=" "
 251 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
 252   . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 253   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 254 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xu
 255
 256 LD_FLAG=
 257 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 258 RELOCATING=" "
 259 ( echo "/* Default linker script, for normal executables */"
 260   . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 261   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 262 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.x
 263
 264 LD_FLAG=n
 265 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
 266 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
 267 ( echo "/* Script for -n: mix text and data on same page */"
 268   . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 269   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 270 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xn
 271
 272 LD_FLAG=N
 273 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
 274 ( echo "/* Script for -N: mix text and data on same page; don't align data */"
 275   . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 276   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 277 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xbn
 278
 279 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 280   DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
 281   LD_FLAG=c
 282   COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 283   ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
 284     . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 285     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 286   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xc
 287   rm -f ${COMBRELOC}
 288   LD_FLAG=w
 289   RELRO_NOW=" "
 290   COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp
 291   ( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */"
 292     . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 293     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 294   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xw
 295   rm -f ${COMBRELOC}
 296   COMBRELOC=
 297   unset RELRO_NOW
 298 fi
 299
 300 if test -n "$GENERATE_SHLIB_SCRIPT"; then
 301   LD_FLAG=shared
 302   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 303   CREATE_SHLIB=" "
 304   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 305   (
 306     echo "/* Script for ld --shared: link shared library */"
 307     . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 308     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 309   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xs
 310   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 311     LD_FLAG=cshared
 312     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 313     COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp
 314     ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
 315       . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 316       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 317     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xsc
 318     rm -f ${COMBRELOC}
 319     LD_FLAG=wshared
 320     RELRO_NOW=" "
 321     COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp
 322     ( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */"
 323       . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 324       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 325     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xsw
 326     rm -f ${COMBRELOC}
 327     COMBRELOC=
 328     unset RELRO_NOW
 329   fi
 330   unset CREATE_SHLIB
 331 fi
 332
 333 if test -n "$GENERATE_PIE_SCRIPT"; then
 334   LD_FLAG=pie
 335   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 336   CREATE_PIE=" "
 337   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 338   (
 339     echo "/* Script for ld -pie: link position independent executable */"
 340     . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 341     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 342   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xd
 343   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 344     LD_FLAG=cpie
 345     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 346     COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp
 347     ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
 348       . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 349       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 350     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xdc
 351     rm -f ${COMBRELOC}
 352     LD_FLAG=wpie
 353     RELRO_NOW=" "
 354     COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp
 355     ( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */"
 356       . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 357       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 358     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xdw
 359     rm -f ${COMBRELOC}
 360     COMBRELOC=
 361     unset RELRO_NOW
 362   fi
 363   unset CREATE_PIE
 364 fi
 365
 366 case " $EMULATION_LIBPATH " in
 367     *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
 368 esac
 369
 370 # Generate e${EMULATION_NAME}.c.
 371 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em