X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=ld%2Fgenscripts.sh;h=4c7226ad6b0ce9acd19956a62e34e39cbedef746;hb=c9e214e571d08fa968a53210682a14060261b91c;hp=a6a0e2e40280bbe9385fa0e069116800d068b323;hpb=ff76a7dbf3f970aa7d3138d74035938d0d3ab306;p=binutils-gdb.git

diff --git a/ld/genscripts.sh b/ld/genscripts.sh
index a6a0e2e4028..4c7226ad6b0 100755
--- a/ld/genscripts.sh
+++ b/ld/genscripts.sh
@@ -1,18 +1,118 @@
-# genscripts.sh
-# This shell script does the work of generating the ld-emulation-target
-# specific information from a specific file of paramaters.
-# Usage: genscripts.sh srcdir libdir host_alias target_alias emulation_name
+#!/bin/sh
+# genscripts.sh - generate the ld-emulation-target specific files
+#
+# Usage: genscripts_extra.sh \
+#          srcdir \
+#          libdir \
+#          exec_prefix \
+#          host \
+#          target \
+#          target_alias \
+#          default_emulation \
+#          native_lib_dirs \
+#          use_sysroot \
+#          this_emulation \
+# optional:
+#          tool_dir \
+#          customizer_script
+#
 # Sample usage:
-# genscripts.sh /offsite/djm/work/devo/ld /usr/local/lib sparc-sun-sunos4.1.3 sparc-sun-sunos4.1.3 sun3.sh
-# produces sun3.x sun3.xbn sun3.xn sun3.xr sun3.xu em_sun3.c
+#
+#   genscripts_extra.sh \
+#    /sources/ld \
+#    /usr/local/lib \
+#    /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_alias=$3
-target_alias=$4
+exec_prefix=$3
+host=$4
+target=$5
+target_alias=$6
+EMULATION_LIBPATH=$7
+NATIVE_LIB_DIRS=$8
+use_sysroot=$9
+shift 9
+EMULATION_NAME=$1
+TOOL_LIB=$2
+CUSTOMIZER_SCRIPT=$3
+
+# 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/$5
+. ${CUSTOMIZER_SCRIPT} ${EMULATION_NAME}
+
+if test -d ldscripts; then
+  true
+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.
@@ -20,35 +120,104 @@ target_alias=$4
 #
 # 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${LIB_PATH}" = "x" ] ; then
-   if [ "x${host_alias}" = "x${target_alias}" ] ; then
-      # Native.
-      LIB_PATH=/lib:/usr/lib:${libdir}
-      if [ "${libdir}" != /usr/local/lib ] ; then
-        LIB_PATH=${LIB_PATH}:/usr/local/lib
-      fi
-   else
-      # Cross.
-      LIB_PATH=
-   fi
+if [ "x${LIB_PATH}" = "x" ] && [ "x${USE_LIBPATH}" = xyes ] ; then
+  LIB_PATH2=
+  if [ x"$use_sysroot" != xyes ] ; then
+    LIB_PATH2=${libdir}
+  fi
+  for lib in ${NATIVE_LIB_DIRS}; do
+    # The "=" is harmless if we aren't using a sysroot, but also needless.
+    if [ "x${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
-LIB_SEARCH_DIRS=`echo ${LIB_PATH} | tr ':' ' ' | sed -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\1);/g'`
 
-# Generate 5 script files from a master script template in
-# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 script files
-# is actually used depends on command line options given to ld.
+
+# 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
+fi
+
+LIB_SEARCH_DIRS=`echo ${LIB_PATH} | sed -e 's/:/ /g' -e 's/\([^ ][^ ]*\)/SEARCH_DIR(\\"\1\\");/g'`
+
+# We need it for testsuite.
+case " $EMULATION_LIBPATH " in
+  *" ${EMULATION_NAME} "*)
+    test -d tmpdir || mkdir tmpdir
+    test -f tmpdir/libpath.exp || \
+    echo "set libpath \"${LIB_PATH}\"" | sed -e 's/:/ /g' > tmpdir/libpath.exp
+    ;;
+esac
+
+# Generate 5 or 6 script files from a master script template in
+# ${srcdir}/scripttempl/${SCRIPT_NAME}.sh.  Which one of the 5 or 6
+# script files is actually used depends on command line options given
+# to ld.  (SCRIPT_NAME was set in the emulparams_file.)
 #
 # A .x script file is the default script.
 # A .xr script is for linking without relocation (-r flag).
 # A .xu script is like .xr, but *do* create constructors (-Ur flag).
 # A .xn script is for linking with -n flag (mix text and data on same page).
 # A .xbn script is for linking with -N flag (mix text and data on same page).
+# 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.
 
-SEGMENT_SIZE=${SEGMENT_SIZE-${PAGE_SIZE}}
+if [ "x$SCRIPT_NAME" = "xelf" ]; then
+  GENERATE_COMBRELOC_SCRIPT=yes
+fi
+
+SEGMENT_SIZE=${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-${DATA_ALIGNMENT_}}"
@@ -59,35 +228,105 @@ DATA_ALIGNMENT_u="${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
+CONSTRUCTING=" "
+( 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
+RELOCATING=" "
+( 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 ${COMBRELOC}
+  COMBRELOC=
+fi
+
+if test -n "$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.
+  (
+    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}.xc.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 ${COMBRELOC}
+    COMBRELOC=
+  fi
+  unset CREATE_SHLIB
+fi
+
+if test -n "$GENERATE_PIE_SCRIPT"; then
+  LD_FLAG=pie
+  DATA_ALIGNMENT=${DATA_ALIGNMENT_s-${DATA_ALIGNMENT_}}
+  CREATE_PIE=" "
+  # Note that TEXT_START_ADDR is set to NONPAGED_TEXT_START_ADDR.
+  (
+    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}.xc.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}
+    COMBRELOC=
+  fi
+  unset CREATE_PIE
+fi
 
-#sed -e s/"<ldtarget>"/${EMULATION_NAME}/g -e s/"<arch>"/${ARCH}/g \
-# -e s/"<target>"/${EMULATION_NAME}/g -e s/"<target_name>"/${OUTPUT_FORMAT}/g \
-# <${srcdir}/${TEMPLATE_NAME-ldtemplate} >em_${EMULATION_NAME}.c
+case " $EMULATION_LIBPATH " in
+    *" ${EMULATION_NAME} "*) COMPILE_IN=true;;
+esac
 
-# Generate em_${EMULATION_NAME}.c.
+# Generate e${EMULATION_NAME}.c.
 . ${srcdir}/emultempl/${TEMPLATE_NAME-generic}.em