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 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 #  "" 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 EMULATION_NAME=$9
  23 shift 9
  24 # Can't use ${1:-$target_alias} here due to an Ultrix shell bug.
  25 if [ "x$1" = "x" ] ; then
  26   tool_lib=${exec_prefix}/${target_alias}/lib
  27 else
  28   tool_lib=${exec_prefix}/$1/lib
  29 fi
  30
  31 # Include the emulation-specific parameters:
  32 . ${srcdir}/emulparams/${EMULATION_NAME}.sh
  33
  34 if test -d ldscripts; then
  35   true
  36 else
  37   mkdir ldscripts
  38 fi
  39
  40 # Set the library search path, for libraries named by -lfoo.
  41 # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
  42 # Otherwise, the default is set here.
  43 #
  44 # The format is the usual list of colon-separated directories.
  45 # To force a logically empty LIB_PATH, do LIBPATH=":".
  46
  47 if [ "x${LIB_PATH}" = "x" ] ; then
  48   # Cross, or native non-default emulation not requesting LIB_PATH.
  49   LIB_PATH=
  50
  51   if [ "x${host}" = "x${target}" ] ; then
  52     case " $EMULATION_LIBPATH " in
  53       *" ${EMULATION_NAME} "*)
  54         # Native, and default or emulation requesting LIB_PATH.
  55         LIB_PATH=/lib:/usr/lib
  56         if [ -n "${NATIVE_LIB_DIRS}" ]; then
  57           LIB_PATH=${LIB_PATH}:${NATIVE_LIB_DIRS}
  58         fi
  59         if [ "${libdir}" != /usr/lib ]; then
  60           LIB_PATH=${LIB_PATH}:${libdir}
  61         fi
  62         if [ "${libdir}" != /usr/local/lib ] ; then
  63           LIB_PATH=${LIB_PATH}:/usr/local/lib
  64         fi
  65     esac
  66   fi
  67 fi
  68
  69 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib.
  70 LIB_PATH=${LIB_PATH}:${tool_lib}
  71
  72 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | tr ':' ' ' | sed -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
  73
  74 # Generate 5 or 6 script files from a master script template in
  75 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
  76 # script files is actually used depends on command line options given
  77 # to ld.  (SCRIPT_NAME was set in the emulparams_file.)
  78 #
  79 # A .x script file is the default script.
  80 # A .xr script is for linking without relocation (-r flag).
  81 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
  82 # A .xn script is for linking with -n flag (mix text and data on same page).
  83 # A .xbn script is for linking with -N flag (mix text and data on same page).
  84 # A .xs script is for generating a shared library with the --shared
  85 #   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
  86 #   emulation parameters.
  87
  88 SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
  89
  90 # Determine DATA_ALIGNMENT for the 5 variants, using
  91 # values specified in the emulparams/<emulation>.sh file or default.
  92
  93 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
  94 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
  95 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
  96 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
  97 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
  98
  99 LD_FLAG=r
 100 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
 101 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
 102 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
 103   ldscripts/${EMULATION_NAME}.xr
 104
 105 LD_FLAG=u
 106 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
 107 CONSTRUCTING=" "
 108 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
 109   ldscripts/${EMULATION_NAME}.xu
 110
 111 LD_FLAG=
 112 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 113 RELOCATING=" "
 114 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
 115   ldscripts/${EMULATION_NAME}.x
 116
 117 LD_FLAG=n
 118 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
 119 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
 120 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
 121   ldscripts/${EMULATION_NAME}.xn
 122
 123 LD_FLAG=N
 124 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
 125 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
 126   ldscripts/${EMULATION_NAME}.xbn
 127
 128 if test -n "$GENERATE_SHLIB_SCRIPT"; then
 129   LD_FLAG=shared
 130   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 131   CREATE_SHLIB=" "
 132   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 133   (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
 134     ldscripts/${EMULATION_NAME}.xs
 135 fi
 136
 137 for i in $EMULATION_LIBPATH ; do
 138   test "$i" = "$EMULATION_NAME" && COMPILE_IN=true
 139 done
 140
 141 # Generate e${EMULATION_NAME}.c.
 142 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em