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