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${USE_LIBPATH}" = xyes ] ; then
  77   if [ x"$use_sysroot" != xyes ] ; then
  78     LIB_PATH=${libdir}
  79   fi
  80   LIB_PATH2=""
  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=${LIB_PATH2}:${lib} ;;
 101       esac
 102     else
 103       case :${LIB_PATH}: in
 104         *:${lib}:*) ;;
 105         ::) LIB_PATH=${lib} ;;
 106         *) LIB_PATH=${LIB_PATH}:${lib} ;;
 107       esac
 108     fi
 109   done
 110   LIB_PATH=${LIB_PATH}${LIB_PATH2}
 111 fi
 112
 113
 114 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
 115 # sysrooted configurations.
 116 if [ "x${use_sysroot}" != "xyes" ] ; then
 117   LIB_PATH=${tool_lib}:${LIB_PATH}
 118 fi
 119
 120 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
 121
 122 # We need it for testsuite.
 123 case " $EMULATION_LIBPATH " in
 124   *" ${EMULATION_NAME} "*)
 125     test -d tmpdir || mkdir tmpdir
 126     rm -f tmpdir/libpath
 127     echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
 128     ;;
 129 esac
 130
 131 # Generate 5 or 6 script files from a master script template in
 132 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
 133 # script files is actually used depends on command line options given
 134 # to ld.  (SCRIPT_NAME was set in the emulparams_file.)
 135 #
 136 # A .x script file is the default script.
 137 # A .xr script is for linking without relocation (-r flag).
 138 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
 139 # A .xn script is for linking with -n flag (mix text and data on same page).
 140 # A .xbn script is for linking with -N flag (mix text and data on same page).
 141 # A .xs script is for generating a shared library with the --shared
 142 #   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
 143 #   emulation parameters.
 144 # A .xc script is for linking with -z combreloc; it is only generated if
 145 #   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 146 #   $SCRIPT_NAME is "elf".
 147 # A .xsc script is for linking with --shared -z combreloc; it is generated
 148 #   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 149 #   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
 150 #   parameters too.
 151
 152 if [ "x$SCRIPT_NAME" = "xelf" ]; then
 153   GENERATE_COMBRELOC_SCRIPT=yes
 154 fi
 155
 156 SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
 157
 158 # Determine DATA_ALIGNMENT for the 5 variants, using
 159 # values specified in the emulparams/<emulation>.sh file or default.
 160
 161 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
 162 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
 163 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
 164 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
 165 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
 166
 167 LD_FLAG=r
 168 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
 169 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
 170 ( echo "/* Script for ld -r: link without relocation */"
 171   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 172   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 173 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xr
 174
 175 LD_FLAG=u
 176 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
 177 CONSTRUCTING=" "
 178 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
 179   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 180   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 181 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xu
 182
 183 LD_FLAG=
 184 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 185 RELOCATING=" "
 186 ( echo "/* Default linker script, for normal executables */"
 187   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 188   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 189 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.x
 190
 191 LD_FLAG=n
 192 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
 193 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
 194 ( echo "/* Script for -n: mix text and data on same page */"
 195   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 196   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 197 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xn
 198
 199 LD_FLAG=N
 200 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
 201 ( echo "/* Script for -N: mix text and data on same page; don't align data */"
 202   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 203   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 204 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xbn
 205
 206 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 207   DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
 208   LD_FLAG=c
 209   COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 210   ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
 211     . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 212     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 213   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xc
 214   rm -f ${COMBRELOC}
 215   COMBRELOC=
 216 fi
 217
 218 if test -n "$GENERATE_SHLIB_SCRIPT"; then
 219   LD_FLAG=shared
 220   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 221   CREATE_SHLIB=" "
 222   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 223   (
 224     echo "/* Script for ld --shared: link shared library */"
 225     . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 226     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 227   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xs
 228   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 229     LD_FLAG=cshared
 230     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 231     COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 232     ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
 233       . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 234       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 235     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xsc
 236     rm -f ${COMBRELOC}
 237     COMBRELOC=
 238   fi
 239   unset CREATE_SHLIB
 240 fi
 241
 242 if test -n "$GENERATE_PIE_SCRIPT"; then
 243   LD_FLAG=pie
 244   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 245   CREATE_PIE=" "
 246   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 247   (
 248     echo "/* Script for ld -pie: link position independent executable */"
 249     . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 250     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 251   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xd
 252   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 253     LD_FLAG=cpie
 254     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 255     COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 256     ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
 257       . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 258       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 259     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xdc
 260     rm -f ${COMBRELOC}
 261     COMBRELOC=
 262   fi
 263   unset CREATE_PIE
 264 fi
 265
 266 case " $EMULATION_LIBPATH " in
 267     *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
 268 esac
 269
 270 # Generate e${EMULATION_NAME}.c.
 271 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em