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 # A .xc script is for linking with -z combreloc; it is only generated if
  88 #   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
  89 #   $SCRIPT_NAME is "elf".
  90 # A .xsc script is for linking with --shared -z combreloc; it is generated
  91 #   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
  92 #   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
  93 #   parameters too.
  94
  95 if [ "x$SCRIPT_NAME" = "xelf" ]; then
  96   GENERATE_COMBRELOC_SCRIPT=yes
  97 fi
  98
  99 SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
 100
 101 # Determine DATA_ALIGNMENT for the 5 variants, using
 102 # values specified in the emulparams/<emulation>.sh file or default.
 103
 104 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
 105 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
 106 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
 107 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
 108 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
 109
 110 LD_FLAG=r
 111 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
 112 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
 113 ( echo "/* Script for ld -r: link without relocation */"
 114   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 115   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 116 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xr
 117
 118 LD_FLAG=u
 119 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
 120 CONSTRUCTING=" "
 121 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
 122   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 123   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 124 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xu
 125
 126 LD_FLAG=
 127 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 128 RELOCATING=" "
 129 ( echo "/* Default linker script, for normal executables */"
 130   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 131   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 132 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.x
 133
 134 LD_FLAG=n
 135 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
 136 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
 137 ( echo "/* Script for -n: mix text and data on same page */"
 138   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 139   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 140 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xn
 141
 142 LD_FLAG=N
 143 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
 144 ( echo "/* Script for -N: mix text and data on same page; don't align data */"
 145   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 146   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 147 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xbn
 148
 149 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 150   DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
 151   LD_FLAG=c
 152   COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 153   ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
 154     . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 155     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 156   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xc
 157   rm -f ${COMBRELOC}
 158   COMBRELOC=
 159 fi
 160
 161 if test -n "$GENERATE_SHLIB_SCRIPT"; then
 162   LD_FLAG=shared
 163   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 164   CREATE_SHLIB=" "
 165   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 166   (
 167     echo "/* Script for ld --shared: link shared library */"
 168     . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 169     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 170   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xs
 171   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 172     LD_FLAG=cshared
 173     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 174     COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 175     ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
 176       . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 177       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 178     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xsc
 179     rm -f ${COMBRELOC}
 180     COMBRELOC=
 181   fi
 182 fi
 183
 184 for i in $EMULATION_LIBPATH ; do
 185   test "$i" = "$EMULATION_NAME" && COMPILE_IN=true
 186 done
 187
 188 # Generate e${EMULATION_NAME}.c.
 189 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em