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${LIB_PATH}" = "x" ] ; then
  48   if [ "x${host}" = "x${target}" ] ; then
  49     case " $EMULATION_LIBPATH " in
  50       *" ${EMULATION_NAME} "*)
  51         # Native, and default or emulation requesting LIB_PATH.
  52         LIB_PATH=${libdir}
  53         for lib in ${NATIVE_LIB_DIRS}; do
  54           case :${LIB_PATH}: in
  55             *:${lib}:*) ;;
  56             *) LIB_PATH=${LIB_PATH}:${lib} ;;
  57           esac
  58         done
  59     esac
  60   fi
  61 fi
  62
  63 # Always search $(tooldir)/lib, aka /usr/local/TARGET/lib.
  64 LIB_PATH=${tool_lib}:${LIB_PATH}
  65
  66 LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
  67
  68 # Generate 5 or 6 script files from a master script template in
  69 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
  70 # script files is actually used depends on command line options given
  71 # to ld.  (SCRIPT_NAME was set in the emulparams_file.)
  72 #
  73 # A .x script file is the default script.
  74 # A .xr script is for linking without relocation (-r flag).
  75 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
  76 # A .xn script is for linking with -n flag (mix text and data on same page).
  77 # A .xbn script is for linking with -N flag (mix text and data on same page).
  78 # A .xs script is for generating a shared library with the --shared
  79 #   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
  80 #   emulation parameters.
  81 # A .xc script is for linking with -z combreloc; it is only generated if
  82 #   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
  83 #   $SCRIPT_NAME is "elf".
  84 # A .xsc script is for linking with --shared -z combreloc; it is generated
  85 #   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
  86 #   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
  87 #   parameters too.
  88
  89 if [ "x$SCRIPT_NAME" = "xelf" ]; then
  90   GENERATE_COMBRELOC_SCRIPT=yes
  91 fi
  92
  93 SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
  94
  95 # Determine DATA_ALIGNMENT for the 5 variants, using
  96 # values specified in the emulparams/<emulation>.sh file or default.
  97
  98 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
  99 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
 100 DATA_ALIGNMENT_N="${DATA_ALIGNMENT_N-${DATA_ALIGNMENT-.}}"
 101 DATA_ALIGNMENT_r="${DATA_ALIGNMENT_r-${DATA_ALIGNMENT-}}"
 102 DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
 103
 104 LD_FLAG=r
 105 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
 106 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
 107 ( echo "/* Script for ld -r: link without relocation */"
 108   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 109   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 110 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xr
 111
 112 LD_FLAG=u
 113 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
 114 CONSTRUCTING=" "
 115 ( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
 116   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 117   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 118 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xu
 119
 120 LD_FLAG=
 121 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 122 RELOCATING=" "
 123 ( echo "/* Default linker script, for normal executables */"
 124   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 125   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 126 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.x
 127
 128 LD_FLAG=n
 129 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
 130 TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
 131 ( echo "/* Script for -n: mix text and data on same page */"
 132   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 133   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 134 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xn
 135
 136 LD_FLAG=N
 137 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
 138 ( echo "/* Script for -N: mix text and data on same page; don't align data */"
 139   . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 140   . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 141 ) | sed -e '/^ *$/d;s/[         ]*$//' > ldscripts/${EMULATION_NAME}.xbn
 142
 143 if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 144   DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
 145   LD_FLAG=c
 146   COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 147   ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
 148     . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 149     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 150   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xc
 151   rm -f ${COMBRELOC}
 152   COMBRELOC=
 153 fi
 154
 155 if test -n "$GENERATE_SHLIB_SCRIPT"; then
 156   LD_FLAG=shared
 157   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
 158   CREATE_SHLIB=" "
 159   # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
 160   (
 161     echo "/* Script for ld --shared: link shared library */"
 162     . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 163     . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 164   ) | sed -e '/^ *$/d;s/[       ]*$//' > ldscripts/${EMULATION_NAME}.xs
 165   if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
 166     LD_FLAG=cshared
 167     DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
 168     COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
 169     ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
 170       . ${srcdir}/emulparams/${EMULATION_NAME}.sh
 171       . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
 172     ) | sed -e '/^ *$/d;s/[     ]*$//' > ldscripts/${EMULATION_NAME}.xsc
 173     rm -f ${COMBRELOC}
 174     COMBRELOC=
 175   fi
 176 fi
 177
 178 case " $EMULATION_LIBPATH " in
 179     *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
 180 esac
 181
 182 # Generate e${EMULATION_NAME}.c.
 183 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em