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|
#! /bin/sh
# Embed an SPU ELF executable into a PowerPC object file.
#
# Copyright 2006, 2007 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 -W ${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
${SYMBOL}:
.int 12
.int __speelf__
.int __spetoe__
#endif
EOF
}
main "$@"
|
