ld/genscripts.sh

   1 #!/bin/sh
   2 # genscripts.sh - generate the ld-emulation-target specific files
   3 #
   4 # Usage: genscripts.sh srcdir libdir host_alias target_alias \
   5 # default_emulation this_emulation
   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 sun4 sun3
  10 # produces sun3.x sun3.xbn sun3.xn sun3.xr sun3.xu em_sun3.c
  11
  12 srcdir=$1
  13 libdir=$2
  14 host_alias=$3
  15 target_alias=$4
  16 DEFAULT_EMULATION=$5
  17 EMULATION_NAME=$6
  18
  19 # Include the emulation-specific parameters:
  20 . ${srcdir}/emulparams/${EMULATION_NAME}.sh
  21
  22 # Set the library search path, for libraries named by -lfoo.
  23 # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
  24 # Otherwise, the default is set here.
  25 #
  26 # The format is the usual list of colon-separated directories.
  27 # To force a logically empty LIB_PATH, do LIBPATH=":".
  28
  29 if [ "x${LIB_PATH}" = "x" ] ; then
  30    if [ "x${host_alias}" = "x${target_alias}" ] ; then
  31       # Native.
  32       LIB_PATH=/lib:/usr/lib:${libdir}
  33       if [ "${libdir}" != /usr/local/lib ] ; then
  34         LIB_PATH=${LIB_PATH}:/usr/local/lib
  35       fi
  36    else
  37       # Cross.
  38       LIB_PATH=:
  39    fi
  40 fi
  41 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | tr ':' ' ' | sed -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
  42
  43 # Generate 5 script files from a master script template in
  44 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 script files
  45 # is actually used depends on command line options given to ld.
  46 # (SCRIPT_NAME was set in the emulparams_file.)
  47 #
  48 # A .x script file is the default script.
  49 # A .xr script is for linking without relocation (-r flag).
  50 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
  51 # A .xn script is for linking with -n flag (mix text and data on same page).
  52 # A .xbn script is for linking with -N flag (mix text and data on same page).
  53
  54 SEGMENT_SIZE=${SEGMENT_SIZE-${PAGE_SIZE}}
  55
  56 # Determine DATA_ALIGNMENT for the 5 variants, using
  57 # values specified in the emulparams/<emulation>.sh file or default.
  58
  59 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
  60 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
  61 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
  62 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
  63 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
  64
  65 LD_FLAG=r
  66 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
  67 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
  68 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
  69   ldscripts/${EMULATION_NAME}.xr
  70
  71 LD_FLAG=u
  72 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
  73 CONSTRUCTING=
  74 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
  75   ldscripts/${EMULATION_NAME}.xu
  76
  77 LD_FLAG=
  78 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
  79 RELOCATING=
  80 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
  81   ldscripts/${EMULATION_NAME}.x
  82
  83 LD_FLAG=n
  84 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
  85 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
  86 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
  87   ldscripts/${EMULATION_NAME}.xn
  88
  89 LD_FLAG=N
  90 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
  91 (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
  92   ldscripts/${EMULATION_NAME}.xbn
  93
  94 # Generate em_${EMULATION_NAME}.c.
  95 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em