ld/genscripts.sh

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