ld/genscripts.sh

   1 #!/bin/sh
   2 # genscripts.sh - generate the ld-emulation-target specific files
   3 #
   4 # Usage: genscripts.sh srcdir libdir host target target_alias \
   5 # default_emulation native_lib_dirs this_emulation tool_dir
   6 #
   7 # Sample usage:
   8 # genscripts.sh /djm/ld-devo/devo/ld /usr/local/lib sparc-sun-sunos4.1.3 \
   9 # sparc-sun-sunos4.1.3 sparc-sun-sunos4.1.3 sun4 "" sun3 sparc-sun-sunos4.1.3
  10 # produces sun3.x sun3.xbn sun3.xn sun3.xr sun3.xu em_sun3.c
  11
  12 srcdir=$1
  13 libdir=$2
  14 host=$3
  15 target=$4
  16 target_alias=$5
  17 DEFAULT_EMULATION=$6
  18 NATIVE_LIB_DIRS=$7
  19 EMULATION_NAME=$8
  20 tool_lib=`echo ${libdir} | sed -e 's|/lib$||'`/${9-$target_alias}/lib
  21
  22 # Include the emulation-specific parameters:
  23 . ${srcdir}/emulparams/${EMULATION_NAME}.sh
  24
  25 if test -d ldscripts; then
  26   true
  27 else
  28   mkdir ldscripts
  29 fi
  30
  31 # Set the library search path, for libraries named by -lfoo.
  32 # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
  33 # Otherwise, the default is set here.
  34 #
  35 # The format is the usual list of colon-separated directories.
  36 # To force a logically empty LIB_PATH, do LIBPATH=":".
  37
  38 if [ "x${LIB_PATH}" = "x" ] ; then
  39   if [ "x${host}" = "x${target}" ] ; then
  40     if [ "x${DEFAULT_EMULATION}" = "x${EMULATION_NAME}" ] ; then
  41       # Native.
  42       LIB_PATH=/lib:/usr/lib
  43       if [ -n "${NATIVE_LIB_DIRS}" ]; then
  44         LIB_PATH=${LIB_PATH}:${NATIVE_LIB_DIRS}
  45       fi
  46       if [ "${libdir}" != /usr/lib ]; then
  47         LIB_PATH=${LIB_PATH}:${libdir}
  48       fi
  49       if [ "${libdir}" != /usr/local/lib ] ; then
  50         LIB_PATH=${LIB_PATH}:/usr/local/lib
  51       fi
  52     else
  53       # Native, but not default emulation.
  54       LIB_PATH=
  55     fi
  56   else
  57     # Cross.
  58     LIB_PATH=
  59   fi
  60 fi
  61
  62 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib.
  63 LIB_PATH=${LIB_PATH}:${tool_lib}
  64
  65 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | tr ':' ' ' | sed -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
  66
  67 # Generate 5 or 6 script files from a master script template in
  68 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
  69 # script files is actually used depends on command line options given
  70 # to ld.  (SCRIPT_NAME was set in the emulparams_file.)
  71 #
  72 # A .x script file is the default script.
  73 # A .xr script is for linking without relocation (-r flag).
  74 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
  75 # A .xn script is for linking with -n flag (mix text and data on same page).
  76 # A .xbn script is for linking with -N flag (mix text and data on same page).
  77 # A .xs script is for generating a shared library with the --shared
  78 #   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
  79 #   emulation parameters.
  80
  81 SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
  82
  83 # Determine DATA_ALIGNMENT for the 5 variants, using
  84 # values specified in the emulparams/<emulation>.sh file or default.
  85
  86 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
  87 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
  88 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
  89 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
  90 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
  91
  92 LD_FLAG=r
  93 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
  94 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
  95 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
  96   ldscripts/${EMULATION_NAME}.xr
  97
  98 LD_FLAG=u
  99 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
 100 CONSTRUCTING=" "
 101 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
 102   ldscripts/${EMULATION_NAME}.xu
 103
 104 LD_FLAG=
 105 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 106 RELOCATING=" "
 107 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
 108   ldscripts/${EMULATION_NAME}.x
 109
 110 LD_FLAG=n
 111 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
 112 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
 113 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
 114   ldscripts/${EMULATION_NAME}.xn
 115
 116 LD_FLAG=N
 117 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
 118 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
 119   ldscripts/${EMULATION_NAME}.xbn
 120
 121 if test -n "$GENERATE_SHLIB_SCRIPT"; then
 122   LD_FLAG=shared
 123   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 124   CREATE_SHLIB=" "
 125   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 126   (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
 127     ldscripts/${EMULATION_NAME}.xs
 128 fi
 129
 130 test "$DEFAULT_EMULATION" = "$EMULATION_NAME" && COMPILE_IN=true
 131
 132 # Generate e${EMULATION_NAME}.c.
 133 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em