embedspu script

[Alan Modra <amodra at bigpond dot net dot au>]

More CELL support.

	* embedspu.sh: New file.
	* Makefile.am (embedspu): Add rule.
	* configure.in (BUILD_MISC): Add embedspu for powerpc-linux.
	* Makefile.in: Regenerate.
	* configure: Regenerate.

Index: binutils/Makefile.am
===================================================================
RCS file: /cvs/src/src/binutils/Makefile.am,v
retrieving revision 1.78
diff -u -p -r1.78 Makefile.am
--- binutils/Makefile.am	25 Oct 2006 06:49:20 -0000	1.78
+++ binutils/Makefile.am	11 Jan 2007 05:07:50 -0000
@@ -277,6 +277,9 @@ sysinfo.o:
 	  $(CC_FOR_BUILD) -c -I. $(AM_CFLAGS) $(CFLAGS) $(srcdir)/sysinfo.c -Wno-error ; \
 	fi
 
+embedspu: embedspu.sh
+	sed "s@^program_transform_name=@program_transform_name=$(program_transform_name)@" < $< > $@
+
 # We need these for parallel make.
 arparse.h: arparse.c
 defparse.h: defparse.c
Index: binutils/configure.in
===================================================================
RCS file: /cvs/src/src/binutils/configure.in,v
retrieving revision 1.69
diff -u -p -r1.69 configure.in
--- binutils/configure.in	8 Jan 2007 17:21:49 -0000	1.69
+++ binutils/configure.in	11 Jan 2007 05:07:56 -0000
@@ -296,6 +296,9 @@ changequote([,])dnl
 	  DLLTOOL_DEFS="$DLLTOOL_DEFS -DDLLTOOL_PPC"
 	  BUILD_WINDRES='$(WINDRES_PROG)$(EXEEXT)'
 	  ;;
+	powerpc*-*-linux* | powerpc*-*-elf*)
+	  BUILD_MISC=embedspu
+	  ;;
 	sh*-*-pe)
   	  BUILD_DLLTOOL='$(DLLTOOL_PROG)$(EXEEXT)'
 	  DLLTOOL_DEFS="$DLLTOOL_DEFS -DDLLTOOL_SH"
Index: binutils/embedspu.sh
===================================================================
RCS file: binutils/embedspu.sh
diff -N binutils/embedspu.sh
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ binutils/embedspu.sh	11 Jan 2007 06:08:00 -0000
@@ -0,0 +1,187 @@
+#! /bin/sh 
+# Embed an SPU ELF executable into a PowerPC object file.
+#
+# Copyright 2006 Free Software Foundation, Inc.
+#
+# This file is part of GNU Binutils.
+#
+# 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 2 of the License, 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 this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+# 02110-1301, USA.
+
+usage ()
+{
+  echo "Usage: embedspu [flags] symbol_name input_filename output_filename"
+  echo
+  echo "        input_filename:  SPU ELF executable to be embedded"
+  echo "        output_filename: Resulting PowerPC object file"
+  echo "        symbol_name:     Name of program handle struct to be defined"
+  echo "        flags:           GCC flags defining PowerPC object file format"
+  echo "                         (e.g. -m32 or -m64)"
+  exit 1
+}
+
+program_transform_name=
+mydir=`dirname "$0"`
+
+find_prog ()
+{
+  prog=`echo $1 | sed "$program_transform_name"`
+  which $prog > /dev/null 2> /dev/null && return 0
+  prog="$mydir/$prog"
+  test -x "$prog" && return 0
+  prog="$mydir/$1"
+  test -x "$prog" && return 0
+  prog=`echo $1 | sed "$program_transform_name"`
+  return 1
+}
+
+SYMBOL=
+INFILE=
+OUTFILE=
+FLAGS=
+
+parse_args ()
+{
+  while test -n "$1"; do
+    case "$1" in
+      -*) FLAGS="${FLAGS} $1" ;;
+      *)  if test -z "$SYMBOL"; then
+	    SYMBOL="$1"
+	  elif test -z "$INFILE"; then
+	    INFILE="$1"
+	  elif test -z "$OUTFILE"; then
+	    OUTFILE="$1"
+	  else
+	    echo "Too many arguments!"
+	    usage
+	  fi ;;
+    esac
+    shift
+  done
+  if test -z "$OUTFILE"; then
+    usage
+  fi
+  if test ! -r "$INFILE"; then
+    echo "${INFILE}: File not found"
+    usage
+  fi
+}
+
+main ()
+{
+  parse_args "$@"
+
+  # Find a powerpc gcc.  Support running from a combined tree build.
+  if test -x "$mydir/../gcc/xgcc"; then
+    CC="$mydir/../gcc/xgcc -B$mydir/../gcc/"
+  else
+    find_prog gcc
+    if test $? -ne 0; then
+      echo "Cannot find $prog"
+      exit 1
+    fi
+    CC="$prog"
+  fi
+
+  # Find readelf.  Any old readelf should do.  We only want to read syms.
+  find_prog readelf
+  if test $? -ne 0; then
+    if which readelf > /dev/null 2> /dev/null; then
+      prog=readelf
+    else
+      echo "Cannot find $prog"
+      exit 1
+    fi
+  fi
+  READELF="$prog"
+
+  # Sanity check the input file
+  if ! ${READELF} -h ${INFILE} | grep 'Class:.*ELF32' >/dev/null 2>/dev/null \
+     || ! ${READELF} -h ${INFILE} | grep 'Type:.*EXEC' >/dev/null 2>/dev/null \
+     || ! ${READELF} -h ${INFILE} | egrep 'Machine:.*(SPU|17)' >/dev/null 2>/dev/null
+  then
+    echo "${INFILE}: Does not appear to be an SPU executable"
+    exit 1
+  fi
+
+  # Build embedded SPU image.
+  # 1. The whole SPU ELF file is written to .rodata.speelf
+  # 2. Symbols starting with the string "_EAR_" in the SPU ELF image are
+  #    special.  They allow an SPU program to access corresponding symbols
+  #    (ie. minus the _EAR_ prefix), in the PowerPC program.  _EAR_ without
+  #    a suffix is used to refer to the addrress of the SPU image in
+  #    PowerPC address space.  _EAR_* symbols must all be defined in one
+  #    section at 16 byte intervals.
+  #    Find all _EAR_ symbols using readelf, sort by address, and write
+  #    the address of the corresponding PowerPC symbol in a table built
+  #    in .data.spetoe.
+  # 3. Write a struct spe_program_handle to .data.
+  ${CC} ${FLAGS} -x assembler-with-cpp -nostartfiles -nostdlib \
+	-Wa,-mbig -Wl,-r -Wl,-x -o ${OUTFILE} - <<EOF
+ .section .rodata.speelf,"a",@progbits
+ .p2align 7
+__speelf__:
+ .incbin "${INFILE}"
+
+ .section .data.spetoe,"aw",@progbits
+ .p2align 7
+__spetoe__:
+`${READELF} -s ${INFILE} | grep ' _EAR_' | sort -k 2 | awk \
+'BEGIN { \
+  last_addr = 0; \
+  last_sym = ""; \
+} \
+last_addr != 0 && strtonum("0x" $2) != last_addr + 16 { \
+	print "#error Symbols " last_sym " and " $8 " are not 16 bytes apart!"; \
+} \
+{ last_addr = strtonum("0x" $2); \
+  last_sym = $8; \
+} \
+$8 == "_EAR_" { \
+	print "#ifdef _LP64"; \
+	print " .quad __speelf__, 0"; \
+	print "#else"; \
+	print " .int 0, __speelf__, 0, 0"; \
+	print "#endif"; \
+} \
+$8 != "_EAR_" { \
+	print "#ifdef _LP64"; \
+	print " .quad " substr($8, 6) ", 0"; \
+	print "#else"; \
+	print " .int 0, " substr($8, 6) ", 0, 0"; \
+	print "#endif"; \
+}'`
+
+ .section .data,"aw",@progbits
+ .globl ${SYMBOL}
+# fill in a struct spe_program_handle
+#ifdef _LP64
+ .p2align 3
+${SYMBOL}:
+ .int 24
+ .int 0
+ .quad __speelf__
+ .quad __spetoe__
+#else
+ .p2align 2
+${SYMBOL}:
+ .int 12
+ .int __speelf__
+ .int __spetoe__
+#endif
+EOF
+}
+
+main "$@"

-- 
Alan Modra
IBM OzLabs - Linux Technology Centre