ld/genscripts.sh

   1 # genscripts.sh
   2 # This shell script does the work of generating the ld-emulation-target
   3 # specific information from a specific file of paramaters.
   4 # Usage: genscripts.sh srcdir libdir host_alias target_alias emulation_name
   5 # Sample usage:
   6 # genscripts.sh /offsite/djm/work/devo/ld /usr/local/lib sparc-sun-sunos4.1.3 sparc-sun-sunos4.1.3 sun3.sh
   7 # produces sun3.x sun3.xbn sun3.xn sun3.xr sun3.xu em_sun3.c
   8
   9 srcdir=$1
  10 libdir=$2
  11 host_alias=$3
  12 target_alias=$4
  13
  14 # Include the emulation-specific parameters:
  15 . ${srcdir}/emulparams/$5
  16
  17 # Set the library search path, for libraries named by -lfoo.
  18 # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
  19 # Otherwise, the default is set here.
  20 #
  21 # The format is the usual list of colon-separated directories.
  22 # To force a logically empty LIB_PATH, do LIBPATH=":".
  23
  24 if [ "x${LIB_PATH}" = "x" ] ; then
  25    if [ "x${host_alias}" = "x${target_alias}" ] ; then
  26       # Native.
  27       LIB_PATH=/lib:/usr/lib:${libdir}
  28       if [ "${libdir}" != /usr/local/lib ] ; then
  29         LIB_PATH=${LIB_PATH}:/usr/local/lib
  30       fi
  31    else
  32       # Cross.
  33       LIB_PATH=
  34    fi
  35 fi
  36 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | tr ':' ' ' | sed -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
  37
  38 # Generate 5 script files from a master script template in
  39 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 script files
  40 # is actually used depends on command line options given to ld.
  41 #
  42 # A .x script file is the default script.
  43 # A .xr script is for linking without relocation (-r flag).
  44 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
  45 # A .xn script is for linking with -n flag (mix text and data on same page).
  46 # A .xbn script is for linking with -N flag (mix text and data on same page).
  47
  48 SEGMENT_SIZE=${SEGMENT_SIZE-${PAGE_SIZE}}
  49
  50 # Determine DATA_ALIGNMENT for the 5 variants, using
  51 # values specified in the emulparams/<emulation>.sh file or default.
  52
  53 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
  54 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
  55 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
  56 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
  57 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
  58
  59 LD_FLAG=r
  60 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
  61 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
  62 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
  63   ldscripts/${EMULATION_NAME}.xr
  64
  65 LD_FLAG=u
  66 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
  67 CONSTRUCTING=
  68 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
  69   ldscripts/${EMULATION_NAME}.xu
  70
  71 LD_FLAG=
  72 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
  73 RELOCATING=
  74 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
  75   ldscripts/${EMULATION_NAME}.x
  76
  77 LD_FLAG=n
  78 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
  79 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
  80 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
  81   ldscripts/${EMULATION_NAME}.xn
  82
  83 LD_FLAG=N
  84 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
  85 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
  86   ldscripts/${EMULATION_NAME}.xbn
  87
  88 #sed -e s/"<ldtarget>"/${EMULATION_NAME}/g -e s/"<arch>"/${ARCH}/g \
  89 # -e s/"<target>"/${EMULATION_NAME}/g -e s/"<target_name>"/${OUTPUT_FORMAT}/g \
  90 # <${srcdir}/${TEMPLATE_NAME-ldtemplate} >em_${EMULATION_NAME}.c
  91
  92 # Generate em_${EMULATION_NAME}.c.
  93 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em