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   for lib in ${NATIVE_LIB_DIRS}; do
  81     # The "=" is harmless if we aren't using a sysroot, but also needless.
  82     if [ "x${use_sysroot}" = "xyes" ] ; then
  83       lib="=${lib}"
  84     fi
  85     case :${LIB_PATH}: in
  86       *:${lib}:*) ;;
  87       ::) LIB_PATH=${lib} ;;
  88       *) LIB_PATH=${LIB_PATH}:${lib} ;;
  89     esac
  90   done
  91   if test -n "$LIBPATH_SUFFIX" ; then
  92     LIB_PATH=`echo ${LIB_PATH}: | sed -e s,:,${LIBPATH_SUFFIX}:,g`$LIB_PATH
  93   fi
  94 fi
  95
  96
  97 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
  98 # sysrooted configurations.
  99 if [ "x${use_sysroot}" != "xyes" ] ; then
 100   LIB_PATH=${tool_lib}:${LIB_PATH}
 101 fi
 102
 103 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
 104
 105 # Generate 5 or 6 script files from a master script template in
 106 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
 107 # script files is actually used depends on command line options given
 108 # to ld.  (SCRIPT_NAME was set in the emulparams_file.)
 109 #
 110 # A .x script file is the default script.
 111 # A .xr script is for linking without relocation (-r flag).
 112 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
 113 # A .xn script is for linking with -n flag (mix text and data on same page).
 114 # A .xbn script is for linking with -N flag (mix text and data on same page).
 115 # A .xs script is for generating a shared library with the --shared
 116 #   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
 117 #   emulation parameters.
 118 # A .xc script is for linking with -z combreloc; it is only generated if
 119 #   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 120 #   $SCRIPT_NAME is "elf".
 121 # A .xsc script is for linking with --shared -z combreloc; it is generated
 122 #   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
 123 #   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
 124 #   parameters too.
 125
 126 if [ "x$SCRIPT_NAME" = "xelf" ]; then
 127   GENERATE_COMBRELOC_SCRIPT=yes
 128 fi
 129
 130 SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
 131
 132 # Determine DATA_ALIGNMENT for the 5 variants, using
 133 # values specified in the emulparams/<emulation>.sh file or default.
 134
 135 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
 136 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
 137 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
 138 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
 139 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
 140
 141 LD_FLAG=r
 142 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
 143 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
 144 ( echo "/* Script for ld -r: link without relocation */"
 145   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 146   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 147 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xr
 148
 149 LD_FLAG=u
 150 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
 151 CONSTRUCTING=" "
 152 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
 153   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 154   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 155 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xu
 156
 157 LD_FLAG=
 158 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 159 RELOCATING=" "
 160 ( echo "/* Default linker script, for normal executables */"
 161   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 162   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 163 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.x
 164
 165 LD_FLAG=n
 166 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
 167 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
 168 ( echo "/* Script for -n: mix text and data on same page */"
 169   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 170   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 171 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xn
 172
 173 LD_FLAG=N
 174 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
 175 ( echo "/* Script for -N: mix text and data on same page; don't align data */"
 176   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 177   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 178 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xbn
 179
 180 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 181   DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
 182   LD_FLAG=c
 183   COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 184   ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
 185     . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 186     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 187   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xc
 188   rm -f ${COMBRELOC}
 189   COMBRELOC=
 190 fi
 191
 192 if test -n "$GENERATE_SHLIB_SCRIPT"; then
 193   LD_FLAG=shared
 194   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 195   CREATE_SHLIB=" "
 196   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 197   (
 198     echo "/* Script for ld --shared: link shared library */"
 199     . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 200     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 201   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xs
 202   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 203     LD_FLAG=cshared
 204     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 205     COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 206     ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
 207       . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 208       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 209     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xsc
 210     rm -f ${COMBRELOC}
 211     COMBRELOC=
 212   fi
 213 fi
 214
 215 case " $EMULATION_LIBPATH " in
 216     *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
 217 esac
 218
 219 # Generate e${EMULATION_NAME}.c.
 220 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em