X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=ld%2Fgenscripts.sh;h=d78ffce3c2360fb596a864c2986267e7a3e9baa0;hb=7e976ae46d73ba3b38c95fba78385837295b0440;hp=8294af7068eafa39af5715a2788b853504bb360a;hpb=30727aa6d12fb866494020c0b62ab265a2bdcdfe;p=deliverable%2Fbinutils-gdb.git

diff --git a/ld/genscripts.sh b/ld/genscripts.sh
index 8294af7068..d78ffce3c2 100755
--- a/ld/genscripts.sh
+++ b/ld/genscripts.sh
@@ -1,26 +1,111 @@
 #!/bin/sh
 # genscripts.sh - generate the ld-emulation-target specific files
+# Copyright 2007 Free Software Foundation, Inc.
 #
-# Usage: genscripts.sh srcdir libdir host target target_alias \
-# default_emulation native_lib_dirs this_emulation tool_dir
+# This file is part of the Gnu Linker.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GLD; see the file COPYING.  If not, write to the Free
+# Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+# 02110-1301, USA.
+#
+# Usage: genscripts_extra.sh \
+#          srcdir \
+#          libdir \
+#          prefix \
+#          exec_prefix \
+#          host \
+#          target \
+#          target_alias \
+#          default_emulation \
+#          native_lib_dirs \
+#          use_sysroot \
+#          this_emulation \
+# optional:
+#          tool_dir \
+#          customizer_script
 #
 # Sample usage:
-# genscripts.sh /djm/ld-devo/devo/ld /usr/local/lib sparc-sun-sunos4.1.3 \
-# sparc-sun-sunos4.1.3 sparc-sun-sunos4.1.3 sun4 "" sun3 sparc-sun-sunos4.1.3
-# produces sun3.x sun3.xbn sun3.xn sun3.xr sun3.xu em_sun3.c
+#
+#   genscripts_extra.sh \
+#    /sources/ld \
+#    /usr/local/lib \
+#    /usr/local \
+#    /usr/local \
+#    sparc-sun-sunos4.1.3 \
+#    sparc-sun-sunos4.1.3 \
+#    sparc-sun-sunos4.1.3 \
+#    sun4 \
+#    "" \
+#    no \
+#    sun3 \
+#    sparc-sun-sunos4.1.3 \
+#    sparc.sh
+#
+# produces the linker scripts:
+#
+#   sun3.x       [default linker script]
+#   sun3.xbn     [used when the linker is invoked with "-N"]
+#   sun3.xn      [used when the linker is invoked with "-n"]
+#   sun3.xr      [used when the linker is invoked with "-r"]
+#   sun3.xu      [used when the linker is invoked with "-Ur"]
+# and maybe:
+#   sun3.xc      [used when the linker is invoked with "-z combreloc"]
+#   sun3.xsc     [used when the linker is invoked with "--shared"]
+#   sun3.xdc     [used when the linker is invoked with "-pie"]
+#
+# It also produced the C source file:
+#
+#   em_sun3.c
+#
+# which is then compiled into the linker.
+#
+# The linker scripts are created by running the shell script
+# /sources/ld/emulparams/sparc.sh to set the value of ${SCRIPT_NAME}
+# (and any other variables it wants to).  ${SCRIPT_NAME} is then
+# invoked with a variable called ${LD_FLAG} to tell it which version
+# of the linker script to create.
+
 
 srcdir=$1
 libdir=$2
-host=$3
-target=$4
-target_alias=$5
-EMULATION_LIBPATH=$6
-NATIVE_LIB_DIRS=$7
-EMULATION_NAME=$8
-tool_lib=`echo ${libdir} | sed -e 's|/lib$||'`/${9-$target_alias}/lib
+prefix=$3
+exec_prefix=$4
+host=$5
+target=$6
+target_alias=$7
+EMULATION_LIBPATH=$8
+NATIVE_LIB_DIRS=$9
+shift 9
+use_sysroot=$1
+EMULATION_NAME=$2
+TOOL_LIB=$3
+CUSTOMIZER_SCRIPT=$4
+
+# Can't use ${TOOL_LIB:-$target_alias} here due to an Ultrix shell bug.
+if [ "x${TOOL_LIB}" = "x" ] ; then
+  tool_lib=${exec_prefix}/${target_alias}/lib
+else
+  tool_lib=${exec_prefix}/${TOOL_LIB}/lib
+fi
+
+if [ "x${CUSTOMIZER_SCRIPT}" = "x" ] ; then
+  CUSTOMIZER_SCRIPT=${EMULATION_NAME}
+fi
+CUSTOMIZER_SCRIPT="${srcdir}/emulparams/${CUSTOMIZER_SCRIPT}.sh"
 
 # Include the emulation-specific parameters:
-. ${srcdir}/emulparams/${EMULATION_NAME}.sh
+. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
 
 if test -d ldscripts; then
   true
@@ -28,39 +113,119 @@ else
   mkdir ldscripts
 fi
 
+# Set some flags for the emultempl scripts.  USE_LIBPATH will
+# be set for any libpath-using emulation; NATIVE will be set for a
+# libpath-using emulation where ${host} = ${target}.  NATIVE
+# may already have been set by the emulparams file, but that's OK
+# (it'll just get set to "yes" twice).
+
+case " $EMULATION_LIBPATH " in
+  *" ${EMULATION_NAME} "*)
+    if [ "x${host}" = "x${target}" ] ; then
+      NATIVE=yes
+      USE_LIBPATH=yes
+    elif [ "x${use_sysroot}" = "xyes" ] ; then
+      USE_LIBPATH=yes
+    fi
+    ;;
+esac
+
+# If the emulparams file sets NATIVE, make sure USE_LIBPATH is set also.
+if test "x$NATIVE" = "xyes" ; then
+  USE_LIBPATH=yes
+fi
+
 # Set the library search path, for libraries named by -lfoo.
 # If LIB_PATH is defined (e.g., by Makefile) and non-empty, it is used.
 # Otherwise, the default is set here.
 #
 # The format is the usual list of colon-separated directories.
 # To force a logically empty LIB_PATH, do LIBPATH=":".
+#
+# If we are using a sysroot, prefix library paths with "=" to indicate this.
+#
+# If the emulparams file set LIBPATH_SUFFIX, prepend an extra copy of
+# the library path with the suffix applied.
 
-if [ "x${LIB_PATH}" = "x" ] ; then
-  # Cross, or native non-default emulation not requesting LIB_PATH.
-  LIB_PATH=
-
-  if [ "x${host}" = "x${target}" ] ; then
-    case " $EMULATION_LIBPATH " in
-      *" ${EMULATION_NAME} "*)
-        # Native, and default or emulation requesting LIB_PATH.
-        LIB_PATH=/lib:/usr/lib
-        if [ -n "${NATIVE_LIB_DIRS}" ]; then
-	  LIB_PATH=${LIB_PATH}:${NATIVE_LIB_DIRS}
-        fi
-        if [ "${libdir}" != /usr/lib ]; then
-	  LIB_PATH=${LIB_PATH}:${libdir}
-        fi
-        if [ "${libdir}" != /usr/local/lib ] ; then
-	  LIB_PATH=${LIB_PATH}:/usr/local/lib
-        fi
+if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then
+  LIB_PATH2=
+
+  libs=${NATIVE_LIB_DIRS}
+  if [ "x${use_sysroot}" != "xyes" ] ; then
+    case " ${libs} " in
+      *" ${libdir} "*) ;;
+      *) libs="${libdir} ${libs}" ;;
+    esac
+    case " ${libs} " in
+      *" ${tool_lib} "*) ;;
+      *) libs="${tool_lib} ${libs}" ;;
     esac
   fi
+
+  for lib in ${libs}; do
+    # The "=" is harmless if we aren't using a sysroot, but also needless.
+    if [ "x${use_sysroot}" = "xyes" ] ; then
+      lib="=${lib}"
+    fi
+    addsuffix=
+    case "${LIBPATH_SUFFIX}:${lib}" in
+      :*) ;;
+      *:*${LIBPATH_SUFFIX}) ;;
+      *) addsuffix=yes ;;
+    esac
+    if test -n "$addsuffix"; then
+      case :${LIB_PATH}: in
+	*:${lib}${LIBPATH_SUFFIX}:*) ;;
+	::) LIB_PATH=${lib}${LIBPATH_SUFFIX} ;;
+	*) LIB_PATH=${LIB_PATH}:${lib}${LIBPATH_SUFFIX} ;;
+      esac
+      case :${LIB_PATH}:${LIB_PATH2}: in
+	*:${lib}:*) ;;
+	*::) LIB_PATH2=${lib} ;;
+	*) LIB_PATH2=${LIB_PATH2}:${lib} ;;
+      esac
+    else
+      case :${LIB_PATH2}: in
+	*:${lib}:*) ;;
+	::) LIB_PATH2=${lib} ;;
+	*) LIB_PATH2=${LIB_PATH2}:${lib} ;;
+      esac
+    fi
+  done
+
+  case :${LIB_PATH}:${LIB_PATH2}: in
+    *:: | ::*) LIB_PATH=${LIB_PATH}${LIB_PATH2} ;;
+    *) LIB_PATH=${LIB_PATH}:${LIB_PATH2} ;;
+  esac
 fi
 
-# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib.
-LIB_PATH=${LIB_PATH}:${tool_lib}
+# Always search $(tooldir)/lib, aka /usr/local/TARGET/lib, except for
+# sysrooted configurations and when LIBPATH=":".
+if [ "x${use_sysroot}" != "xyes" ] ; then
+  case :${LIB_PATH}: in
+  ::: | *:${tool_lib}:*) ;;
+  ::) LIB_PATH=${tool_lib} ;;
+  *) LIB_PATH=${tool_lib}:${LIB_PATH} ;;
+  esac
+  # For multilib targets, search both $tool_lib dirs
+  if [ "x${LIBPATH_SUFFIX}" != "x" ] ; then
+    case :${LIB_PATH}: in
+      ::: | *:${tool_lib}${LIBPATH_SUFFIX}:*) ;;
+      ::) LIB_PATH=${tool_lib}${LIBPATH_SUFFIX} ;;
+      *) LIB_PATH=${tool_lib}${LIBPATH_SUFFIX}:${LIB_PATH} ;;
+    esac
+  fi
+fi
 
-LIB_SEARCH_DIRS=`echo ${LIB_PATH} | tr ':' ' ' | sed -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
+LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
+
+# We need it for testsuite.
+set $EMULATION_LIBPATH
+if [ "x$1" = "x$EMULATION_NAME" ]; then
+    test -d tmpdir || mkdir tmpdir
+    rm -f tmpdir/libpath.exp
+    echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
+fi
 
 # Generate 5 or 6 script files from a master script template in
 # ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
@@ -75,11 +240,22 @@ LIB_SEARCH_DIRS=`echo ${LIB_PATH} | tr ':' ' ' | sed -e 's/\([^ ][^ ]*\)/SEARCH_
 # A .xs script is for generating a shared library with the --shared
 #   flag; it is only generated if $GENERATE_SHLIB_SCRIPT is set by the
 #   emulation parameters.
+# A .xc script is for linking with -z combreloc; it is only generated if
+#   $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
+#   $SCRIPT_NAME is "elf".
+# A .xsc script is for linking with --shared -z combreloc; it is generated
+#   if $GENERATE_COMBRELOC_SCRIPT is set by the emulation parameters or
+#   $SCRIPT_NAME is "elf" and $GENERATE_SHLIB_SCRIPT is set by the emulation
+#   parameters too.
+
+if [ "x$SCRIPT_NAME" = "xelf" ]; then
+  GENERATE_COMBRELOC_SCRIPT=yes
+fi
 
-SEGMENT_SIZE=${SEGMENT_SIZE-${TARGET_PAGE_SIZE}}
+SEGMENT_SIZE=${SEGMENT_SIZE-${MAXPAGESIZE-${TARGET_PAGE_SIZE}}}
 
 # Determine DATA_ALIGNMENT for the 5 variants, using
-# values specified in the emulparams/<emulation>.sh file or default.
+# values specified in the emulparams/<script_to_run>.sh file or default.
 
 DATA_ALIGNMENT_="${DATA_ALIGNMENT_-${DATA_ALIGNMENT-ALIGN(${SEGMENT_SIZE})}}"
 DATA_ALIGNMENT_n="${DATA_ALIGNMENT_n-${DATA_ALIGNMENT_}}"
@@ -90,44 +266,157 @@ DATA_ALIGNMENT_u="${DATA_ALIGNMENT_u-${DATA_ALIGNMENT_r}}"
 LD_FLAG=r
 DATA_ALIGNMENT=${DATA_ALIGNMENT_r}
 DEFAULT_DATA_ALIGNMENT="ALIGN(${SEGMENT_SIZE})"
-(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
-  ldscripts/${EMULATION_NAME}.xr
+( echo "/* Script for ld -r: link without relocation */"
+  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xr
 
 LD_FLAG=u
 DATA_ALIGNMENT=${DATA_ALIGNMENT_u}
 CONSTRUCTING=" "
-(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
-  ldscripts/${EMULATION_NAME}.xu
+( echo "/* Script for ld -Ur: link w/out relocation, do create constructors */"
+  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xu
 
 LD_FLAG=
 DATA_ALIGNMENT=${DATA_ALIGNMENT_}
 RELOCATING=" "
-(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
-  ldscripts/${EMULATION_NAME}.x
+( echo "/* Default linker script, for normal executables */"
+  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.x
 
 LD_FLAG=n
 DATA_ALIGNMENT=${DATA_ALIGNMENT_n}
-TEXT_START_ADDR=${NONPAGED_TEXT_START_ADDR-${TEXT_START_ADDR}}
-(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
-  ldscripts/${EMULATION_NAME}.xn
+( echo "/* Script for -n: mix text and data on same page */"
+  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xn
 
 LD_FLAG=N
 DATA_ALIGNMENT=${DATA_ALIGNMENT_N}
-(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
-  ldscripts/${EMULATION_NAME}.xbn
+( echo "/* Script for -N: mix text and data on same page; don't align data */"
+  . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+  . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xbn
+
+if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
+  DATA_ALIGNMENT=${DATA_ALIGNMENT_c-${DATA_ALIGNMENT_}}
+  LD_FLAG=c
+  COMBRELOC=ldscripts/${EMULATION_NAME}.xc.tmp
+  ( echo "/* Script for -z combreloc: combine and sort reloc sections */"
+    . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xc
+  rm -f ${COMBRELOC}
+  LD_FLAG=w
+  RELRO_NOW=" "
+  COMBRELOC=ldscripts/${EMULATION_NAME}.xw.tmp
+  ( echo "/* Script for -z combreloc -z now -z relro: combine and sort reloc sections */"
+    . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xw
+  rm -f ${COMBRELOC}
+  COMBRELOC=
+  unset RELRO_NOW
+fi
 
 if test -n "$GENERATE_SHLIB_SCRIPT"; then
   LD_FLAG=shared
   DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
   CREATE_SHLIB=" "
-  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
-  (. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc) | sed -e '/^ *$/d' > \
-    ldscripts/${EMULATION_NAME}.xs
+  (
+    echo "/* Script for ld --shared: link shared library */"
+    . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xs
+  if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
+    LD_FLAG=cshared
+    DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
+    COMBRELOC=ldscripts/${EMULATION_NAME}.xsc.tmp
+    ( echo "/* Script for --shared -z combreloc: shared library, combine & sort relocs */"
+      . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xsc
+    rm -f ${COMBRELOC}
+    LD_FLAG=wshared
+    RELRO_NOW=" "
+    COMBRELOC=ldscripts/${EMULATION_NAME}.xsw.tmp
+    ( echo "/* Script for --shared -z combreloc -z now -z relro: shared library, combine & sort relocs */"
+      . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xsw
+    rm -f ${COMBRELOC}
+    COMBRELOC=
+    unset RELRO_NOW
+  fi
+  unset CREATE_SHLIB
 fi
 
-for i in $EMULATION_LIBPATH ; do
-  test "$i" = "$EMULATION_NAME" && COMPILE_IN=true
-done
+if test -n "$GENERATE_PIE_SCRIPT"; then
+  LD_FLAG=pie
+  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
+  CREATE_PIE=" "
+  (
+    echo "/* Script for ld -pie: link position independent executable */"
+    . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+    . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+  ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xd
+  if test -n "$GENERATE_COMBRELOC_SCRIPT"; then
+    LD_FLAG=cpie
+    DATA_ALIGNMENT=${DATA_ALIGNMENT_sc-${DATA_ALIGNMENT}}
+    COMBRELOC=ldscripts/${EMULATION_NAME}.xdc.tmp
+    ( echo "/* Script for -pie -z combreloc: position independent executable, combine & sort relocs */"
+      . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xdc
+    rm -f ${COMBRELOC}
+    LD_FLAG=wpie
+    RELRO_NOW=" "
+    COMBRELOC=ldscripts/${EMULATION_NAME}.xdw.tmp
+    ( echo "/* Script for -pie -z combreloc -z now -z relro: position independent executable, combine & sort relocs */"
+      . ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+      . ${srcdir}/scripttempl/${SCRIPT_NAME}.sc
+    ) | sed -e '/^ *$/d;s/[ 	]*$//' > ldscripts/${EMULATION_NAME}.xdw
+    rm -f ${COMBRELOC}
+    COMBRELOC=
+    unset RELRO_NOW
+  fi
+  unset CREATE_PIE
+fi
+
+case " $EMULATION_LIBPATH " in
+    *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
+esac
+
+if test -n "${BASH+set}"; then
+  source_em()
+  {
+    local current_script="$em_script"
+    em_script=$1
+    . $em_script
+    em_script=$current_script
+  }
+  fragment()
+  {
+    local lineno=$[${BASH_LINENO[0]} + 1]
+    echo >> e${EMULATION_NAME}.c "#line $lineno \"$em_script\""
+    cat >> e${EMULATION_NAME}.c
+  }
+else
+  source_em()
+  {
+    . $1
+  }
+  fragment()
+  {
+    cat >> e${EMULATION_NAME}.c
+  }
+fi
 
 # Generate e${EMULATION_NAME}.c.
-. ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em
+# Start with an empty file, then the sourced .em script
+# can use the "fragment" function to append.
+> e${EMULATION_NAME}.c
+source_em ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em