2 # Embed an SPU ELF executable into a PowerPC object file.
4 # Copyright 2006, 2007 Free Software Foundation, Inc.
6 # This file is part of GNU Binutils.
8 # This program is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation; either version 2 of the License, or
11 # (at your option) any later version.
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program; if not, write to the Free Software
20 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
25 echo "Usage: embedspu [flags] symbol_name input_filename output_filename"
27 echo " input_filename: SPU ELF executable to be embedded"
28 echo " output_filename: Resulting PowerPC object file"
29 echo " symbol_name: Name of program handle struct to be defined"
30 echo " flags: GCC flags defining PowerPC object file format"
31 echo " (e.g. -m32 or -m64)"
35 program_transform_name=
40 prog=`echo $1 | sed "$program_transform_name"`
41 which $prog > /dev/null 2> /dev/null && return 0
43 test -x "$prog" && return 0
45 test -x "$prog" && return 0
46 prog=`echo $1 | sed "$program_transform_name"`
57 while test -n "$1"; do
59 -*) FLAGS="${FLAGS} $1" ;;
60 *) if test -z "$SYMBOL"; then
62 elif test -z "$INFILE"; then
64 elif test -z "$OUTFILE"; then
67 echo "Too many arguments!"
73 if test -z "$OUTFILE"; then
76 if test ! -r "$INFILE"; then
77 echo "${INFILE}: File not found"
86 # Find a powerpc gcc. Support running from a combined tree build.
87 if test -x "$mydir/../gcc/xgcc"; then
88 CC="$mydir/../gcc/xgcc -B$mydir/../gcc/"
91 if test $? -ne 0; then
92 echo "Cannot find $prog"
98 # Find readelf. Any old readelf should do. We only want to read syms.
100 if test $? -ne 0; then
101 if which readelf > /dev/null 2> /dev/null; then
104 echo "Cannot find $prog"
110 # Sanity check the input file
111 if ! ${READELF} -h ${INFILE} | grep 'Class:.*ELF32' >/dev/null 2>/dev/null \
112 || ! ${READELF} -h ${INFILE} | grep 'Type:.*EXEC' >/dev/null 2>/dev/null \
113 || ! ${READELF} -h ${INFILE} | egrep 'Machine:.*(SPU|17)' >/dev/null 2>/dev/null
115 echo "${INFILE}: Does not appear to be an SPU executable"
119 toe=`${READELF} -S ${INFILE} | sed -n -e 's, *\[ *\([0-9]*\)\] *\.toe *[PROGN]*BITS *\([0-9a-f]*\).*,\1 \2,p'`
120 toe_addr=`echo $toe | sed -n -e 's,.* ,,p'`
121 toe=`echo $toe | sed -n -e 's, .*,,p'`
122 sections=`${READELF} -S ${INFILE} | sed -n -e 's, *\[ *\([0-9]*\)\] *[^ ]* *PROGBITS *\([0-9a-f]*\) *\([0-9a-f]*\).*,\1 \2 \3,p'`
123 sections=`echo ${sections}`
125 # Build embedded SPU image.
126 # 1. The whole SPU ELF file is written to .rodata.speelf
127 # 2. Symbols starting with the string "_EAR_" in the SPU ELF image are
128 # special. They allow an SPU program to access corresponding symbols
129 # (ie. minus the _EAR_ prefix), in the PowerPC program. _EAR_ without
130 # a suffix is used to refer to the addrress of the SPU image in
131 # PowerPC address space. _EAR_* symbols must all be defined in .toe
132 # at 16 byte intervals, or they must be defined in other non-bss
134 # Find all _EAR_ symbols in .toe using readelf, sort by address, and
135 # write the address of the corresponding PowerPC symbol in a table
136 # built in .data.spetoe. For _EAE_ symbols not in .toe, create
137 # .reloc commands to relocate their location directly.
138 # 3. Write a struct spe_program_handle to .data.
139 # 4. Write a table of _SPUEAR_ symbols.
140 ${CC} ${FLAGS} -x assembler-with-cpp -nostartfiles -nostdlib \
141 -Wa,-mbig -Wl,-r -Wl,-x -o ${OUTFILE} - <<EOF
142 .section .rodata.speelf,"a",@progbits
147 .section .data.spetoe,"aw",@progbits
150 `${READELF} -s -W ${INFILE} | grep ' _EAR_' | sort -k 2 | awk \
152 addr = strtonum ("0x" '${toe_addr-0}'); \
153 split ("'"${sections}"'", s, " "); \
154 for (i = 1; i in s; i += 3) { \
155 sec_off[s[i]] = strtonum ("0x" s[i+2]) - strtonum ("0x" s[i+1]); \
158 $7 == "'${toe}'" && strtonum ("0x" $2) != addr { \
159 print "#error Symbol " $8 " not in 16 byte element toe array!"; \
165 print "#ifdef _LP64"; \
166 print " .quad " ($8 == "_EAR_" ? "__speelf__" : substr($8, 6)) ", 0"; \
168 print " .int 0, " ($8 == "_EAR_" ? "__speelf__" : substr($8, 6)) ", 0, 0"; \
171 $7 != "'${toe}'" && $7 in sec_off { \
172 print "#ifdef _LP64"; \
173 print " .reloc __speelf__+" strtonum ("0x" $2) + sec_off[$7] ", R_PPC64_ADDR64, " ($8 == "_EAR_" ? "__speelf__" : substr($8, 6)); \
175 print " .reloc __speelf__+" strtonum ("0x" $2) + sec_off[$7] + 4 ", R_PPC_ADDR32, " ($8 == "_EAR_" ? "__speelf__" : substr($8, 6)); \
178 $7 != "'${toe}'" && ! $7 in sec_off { \
179 print "#error Section not found for " $8; \
183 .section .data,"aw",@progbits
185 .type ${SYMBOL}, @object
186 # fill in a struct spe_program_handle
201 .size ${SYMBOL}, . - ${SYMBOL}
203 `${READELF} -s -W ${INFILE} | grep ' _SPUEAR_' | sort -k 2 | awk \
205 print " .globl '${SYMBOL}'_" substr($8, 9); \
206 print " .type '${SYMBOL}'_" substr($8, 9) ", @object"; \
207 print " .size '${SYMBOL}'_" substr($8, 9) ", 4"; \
208 print "'${SYMBOL}'_" substr($8, 9) ":"; \