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3aade688 1#! /bin/sh
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2# Embed an SPU ELF executable into a PowerPC object file.
3#
fd67aa11 4# Copyright (C) 2006-2024 Free Software Foundation, Inc.
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5#
6# This file is part of GNU Binutils.
7#
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
32866df7 10# the Free Software Foundation; either version 3 of the License, or
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11# (at your option) any later version.
12#
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.
17#
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
21# 02110-1301, USA.
22
23usage ()
24{
25 echo "Usage: embedspu [flags] symbol_name input_filename output_filename"
26 echo
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)"
32 exit 1
33}
34
35program_transform_name=
36mydir=`dirname "$0"`
37
38find_prog ()
39{
40 prog=`echo $1 | sed "$program_transform_name"`
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41 prog="$mydir/$prog"
42 test -x "$prog" && return 0
43 prog="$mydir/$1"
44 test -x "$prog" && return 0
45 prog=`echo $1 | sed "$program_transform_name"`
ece5ef60 46 which $prog > /dev/null 2> /dev/null && return 0
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47 return 1
48}
49
50SYMBOL=
51INFILE=
52OUTFILE=
53FLAGS=
54
55parse_args ()
56{
57 while test -n "$1"; do
58 case "$1" in
59 -*) FLAGS="${FLAGS} $1" ;;
60 *) if test -z "$SYMBOL"; then
61 SYMBOL="$1"
62 elif test -z "$INFILE"; then
63 INFILE="$1"
64 elif test -z "$OUTFILE"; then
65 OUTFILE="$1"
66 else
67 echo "Too many arguments!"
68 usage
69 fi ;;
70 esac
71 shift
72 done
73 if test -z "$OUTFILE"; then
74 usage
75 fi
76 if test ! -r "$INFILE"; then
77 echo "${INFILE}: File not found"
78 usage
79 fi
80}
81
82main ()
83{
84 parse_args "$@"
85
86 # Find a powerpc gcc. Support running from a combined tree build.
87 if test -x "$mydir/../gcc/xgcc"; then
88 CC="$mydir/../gcc/xgcc -B$mydir/../gcc/"
89 else
90 find_prog gcc
91 if test $? -ne 0; then
92 echo "Cannot find $prog"
93 exit 1
94 fi
95 CC="$prog"
96 fi
97
ece5ef60 98 # Find readelf. Any old readelf should do.
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99 find_prog readelf
100 if test $? -ne 0; then
101 if which readelf > /dev/null 2> /dev/null; then
102 prog=readelf
103 else
104 echo "Cannot find $prog"
105 exit 1
106 fi
107 fi
108 READELF="$prog"
109
110 # Sanity check the input file
e2bae06c 111 if test `${READELF} -h ${INFILE} | sed -n -e '/Class:.*ELF32/p' -e '/Type:.*EXEC/p' -e '/Machine:.*SPU/p' -e '/Machine:.*17/p' | sed -n '$='` != 3
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112 then
113 echo "${INFILE}: Does not appear to be an SPU executable"
114 exit 1
115 fi
116
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117 toe=`${READELF} -S ${INFILE} | sed -n -e 's, *\[ *\([0-9]*\)\] *\.toe *[PROGN]*BITS *\([0-9a-f]*\).*,\1 \2,p'`
118 toe_addr=`echo $toe | sed -n -e 's,.* ,,p'`
119 toe=`echo $toe | sed -n -e 's, .*,,p'`
cef1fe97 120 has_ea=`${READELF} -S ${INFILE} | sed -n -e 's, *\[ *\([0-9]*\)\] *\._ea *PROGBITS.*,\1,p'`
ece5ef60 121 # For loaded sections, pick off section number, address, and file offset
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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 ${sections}`
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124 # For relocation sections, pick off file offset and info (points to
125 # section where relocs apply)
daaf07b2 126 relas=`${READELF} -S ${INFILE} | sed -n -e 's, *\[ *[0-9]*\] *[^ ]* *RELA *[0-9a-f]* *0*\([0-9a-f][0-9a-f]*\).* \([0-9a-f][0-9a-f]*\) *[0-9a-f][0-9a-f]*$,\1 \2,p'`
ece5ef60 127 relas=`echo ${relas}`
88948ad0 128
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129 # Build embedded SPU image.
130 # 1. The whole SPU ELF file is written to .rodata.speelf
131 # 2. Symbols starting with the string "_EAR_" in the SPU ELF image are
132 # special. They allow an SPU program to access corresponding symbols
133 # (ie. minus the _EAR_ prefix), in the PowerPC program. _EAR_ without
134 # a suffix is used to refer to the addrress of the SPU image in
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135 # PowerPC address space. _EAR_* symbols must all be defined in .toe
136 # at 16 byte intervals, or they must be defined in other non-bss
137 # sections.
138 # Find all _EAR_ symbols in .toe using readelf, sort by address, and
139 # write the address of the corresponding PowerPC symbol in a table
8374f9d4 140 # built in .data.spetoe. For _EAR_ symbols not in .toe, create
88948ad0 141 # .reloc commands to relocate their location directly.
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142 # 3. Look for R_SPU_PPU32 and R_SPU_PPU64 relocations in the SPU ELF image
143 # and create .reloc commands for them.
144 # 4. Write a struct spe_program_handle to .data.
145 # 5. Write a table of _SPUEAR_ symbols.
669a9a2a 146 ${CC} ${FLAGS} -x assembler-with-cpp -nostartfiles -nostdlib \
c67d8df7 147 -Wa,-mbig -Wa,-noexecstack -Wl,-r -Wl,-x -o ${OUTFILE} - <<EOF
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148 .section .data.spetoe,"aw",@progbits
149 .p2align 7
150__spetoe__:
41160f02 151`${READELF} -s -W ${INFILE} | grep ' _EAR_' | sort -k 2 | awk \
669a9a2a 152'BEGIN { \
cef1fe97 153 addr = strtonum ("0x" "'${toe_addr:-0}'"); \
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154 split ("'"${sections}"'", s, " "); \
155 for (i = 1; i in s; i += 3) { \
156 sec_off[s[i]] = strtonum ("0x" s[i+2]) - strtonum ("0x" s[i+1]); \
157 } \
669a9a2a 158} \
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159$7 == "'${toe}'" && strtonum ("0x" $2) != addr { \
160 print "#error Symbol " $8 " not in 16 byte element toe array!"; \
669a9a2a 161} \
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162$7 == "'${toe}'" { \
163 addr = addr + 16; \
669a9a2a 164} \
88948ad0 165$7 == "'${toe}'" { \
669a9a2a 166 print "#ifdef _LP64"; \
88948ad0 167 print " .quad " ($8 == "_EAR_" ? "__speelf__" : substr($8, 6)) ", 0"; \
669a9a2a 168 print "#else"; \
88948ad0 169 print " .int 0, " ($8 == "_EAR_" ? "__speelf__" : substr($8, 6)) ", 0, 0"; \
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170 print "#endif"; \
171} \
88948ad0 172$7 != "'${toe}'" && $7 in sec_off { \
669a9a2a 173 print "#ifdef _LP64"; \
88948ad0 174 print " .reloc __speelf__+" strtonum ("0x" $2) + sec_off[$7] ", R_PPC64_ADDR64, " ($8 == "_EAR_" ? "__speelf__" : substr($8, 6)); \
669a9a2a 175 print "#else"; \
88948ad0 176 print " .reloc __speelf__+" strtonum ("0x" $2) + sec_off[$7] + 4 ", R_PPC_ADDR32, " ($8 == "_EAR_" ? "__speelf__" : substr($8, 6)); \
669a9a2a 177 print "#endif"; \
3ba20bde 178 if (!donedef) { print "#define HAS_RELOCS 1"; donedef = 1; }; \
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179} \
180$7 != "'${toe}'" && ! $7 in sec_off { \
181 print "#error Section not found for " $8; \
182} \
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183'`
184`test -z "${relas}" || ${READELF} -r -W ${INFILE} | awk \
185'BEGIN { \
186 split ("'"${sections}"'", s, " "); \
187 for (i = 1; i in s; i += 3) { \
188 sec_off[s[i]] = strtonum ("0x" s[i+2]) - strtonum ("0x" s[i+1]); \
189 } \
190 split ("'"${relas}"'", s, " "); \
191 for (i = 1; i in s; i += 2) { \
192 rela[s[i]] = strtonum (s[i+1]); \
193 } \
194} \
195/^Relocation section/ { \
196 sec = substr($6, 3); \
197} \
198$3 ~ /R_SPU_PPU/ { \
199 print "#ifdef _LP64"; \
73545089 200 print " .reloc __speelf__+" strtonum ("0x" $1) + sec_off[rela[sec]] ", R_PPC64_ADDR" substr($3, 10) ", " ($5 != "" ? $5 "+0x" $7 : "__speelf__ + 0x" $4); \
ece5ef60 201 print "#else"; \
73545089 202 print " .reloc __speelf__+" strtonum ("0x" $1) + sec_off[rela[sec]] + (substr($3, 10) == "64" ? 4 : 0)", R_PPC_ADDR32, " ($5 != "" ? $5 "+0x" $7 : "__speelf__ + 0x" $4); \
ece5ef60 203 print "#endif"; \
3ba20bde 204 if (!donedef) { print "#define HAS_RELOCS 1"; donedef = 1; }; \
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205} \
206$3 ~ /unrecognized:/ { \
207 print "#ifdef _LP64"; \
73545089 208 print " .reloc __speelf__+" strtonum ("0x" $1) + sec_off[rela[sec]] ", R_PPC64_ADDR" ($4 == "f" ? "64" : "32") ", " ($6 != "" ? $6 "+0x" $8 : "__speelf__ + 0x" $5); \
ece5ef60 209 print "#else"; \
73545089 210 print " .reloc __speelf__+" strtonum ("0x" $1) + sec_off[rela[sec]] + ($4 == "f" ? 4 : 0)", R_PPC_ADDR32, " ($6 != "" ? $6 "+0x" $8 : "__speelf__ + 0x" $5); \
ece5ef60 211 print "#endif"; \
3ba20bde 212 if (!donedef) { print "#define HAS_RELOCS 1"; donedef = 1; }; \
ece5ef60 213} \
88948ad0 214'`
cef1fe97 215#if ${has_ea:-0}
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216 .section .data.speelf,"aw",@progbits
217#elif defined (HAS_RELOCS) && (defined (__PIC__) || defined (__PIE__))
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218 .section .data.rel.ro.speelf,"a",@progbits
219#else
220 .section .rodata.speelf,"a",@progbits
221#endif
222 .p2align 7
223__speelf__:
224 .incbin "${INFILE}"
669a9a2a 225
8374f9d4 226 .section .data.spehandle,"aw",@progbits
669a9a2a 227 .globl ${SYMBOL}
11d5fa89 228 .type ${SYMBOL}, @object
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229# fill in a struct spe_program_handle
230#ifdef _LP64
231 .p2align 3
232${SYMBOL}:
233 .int 24
234 .int 0
235 .quad __speelf__
236 .quad __spetoe__
237#else
238 .p2align 2
239${SYMBOL}:
240 .int 12
241 .int __speelf__
242 .int __spetoe__
243#endif
11d5fa89 244 .size ${SYMBOL}, . - ${SYMBOL}
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245
246`${READELF} -s -W ${INFILE} | grep ' _SPUEAR_' | sort -k 2 | awk \
247'{ \
248 print " .globl '${SYMBOL}'_" substr($8, 9); \
249 print " .type '${SYMBOL}'_" substr($8, 9) ", @object"; \
250 print " .size '${SYMBOL}'_" substr($8, 9) ", 4"; \
251 print "'${SYMBOL}'_" substr($8, 9) ":"; \
dbdca70b 252 print " .int 0x" $2; \
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253} \
254'`
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255EOF
256}
257
258main "$@"