binutils/embedspu.sh

   1 #! /bin/sh
   2 # Embed an SPU ELF executable into a PowerPC object file.
   3 #
   4 # Copyright 2006, 2007 Free Software Foundation, Inc.
   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
  10 # the Free Software Foundation; either version 2 of the License, or
  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
  23 usage ()
  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
  35 program_transform_name=
  36 mydir=`dirname "$0"`
  37
  38 find_prog ()
  39 {
  40   prog=`echo $1 | sed "$program_transform_name"`
  41   which $prog > /dev/null 2> /dev/null && return 0
  42   prog="$mydir/$prog"
  43   test -x "$prog" && return 0
  44   prog="$mydir/$1"
  45   test -x "$prog" && return 0
  46   prog=`echo $1 | sed "$program_transform_name"`
  47   return 1
  48 }
  49
  50 SYMBOL=
  51 INFILE=
  52 OUTFILE=
  53 FLAGS=
  54
  55 parse_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
  82 main ()
  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
  98   # Find readelf.  Any old readelf should do.  We only want to read syms.
  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
 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 ${INFILE} | egrep 'Machine:.*(SPU|17)' >/dev/null 2>/dev/null
 114   then
 115     echo "${INFILE}: Does not appear to be an SPU executable"
 116     exit 1
 117   fi
 118
 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}`
 124
 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
 133   #    sections.
 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 ${OUTFILE} - <<EOF
 142  .section .rodata.speelf,"a",@progbits
 143  .p2align 7
 144 __speelf__:
 145  .incbin "${INFILE}"
 146
 147  .section .data.spetoe,"aw",@progbits
 148  .p2align 7
 149 __spetoe__:
 150 `${READELF} -s -W ${INFILE} | grep ' _EAR_' | sort -k 2 | awk \
 151 'BEGIN { \
 152         addr = strtonum ("0x" '${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]); \
 156         } \
 157 } \
 158 $7 == "'${toe}'" && strtonum ("0x" $2) != addr { \
 159         print "#error Symbol " $8 " not in 16 byte element toe array!"; \
 160 } \
 161 $7 == "'${toe}'" { \
 162         addr = addr + 16; \
 163 } \
 164 $7 == "'${toe}'" { \
 165         print "#ifdef _LP64"; \
 166         print " .quad " ($8 == "_EAR_" ? "__speelf__" : substr($8, 6)) ", 0"; \
 167         print "#else"; \
 168         print " .int 0, " ($8 == "_EAR_" ? "__speelf__" : substr($8, 6)) ", 0, 0"; \
 169         print "#endif"; \
 170 } \
 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)); \
 174         print "#else"; \
 175         print " .reloc __speelf__+" strtonum ("0x" $2) + sec_off[$7] + 4 ", R_PPC_ADDR32, " ($8 == "_EAR_" ? "__speelf__" : substr($8, 6)); \
 176         print "#endif"; \
 177 } \
 178 $7 != "'${toe}'" && ! $7 in sec_off { \
 179         print "#error Section not found for " $8; \
 180 } \
 181 '`
 182
 183  .section .data,"aw",@progbits
 184  .globl ${SYMBOL}
 185  .type ${SYMBOL}, @object
 186 # fill in a struct spe_program_handle
 187 #ifdef _LP64
 188  .p2align 3
 189 ${SYMBOL}:
 190  .int 24
 191  .int 0
 192  .quad __speelf__
 193  .quad __spetoe__
 194 #else
 195  .p2align 2
 196 ${SYMBOL}:
 197  .int 12
 198  .int __speelf__
 199  .int __spetoe__
 200 #endif
 201  .size ${SYMBOL}, . - ${SYMBOL}
 202
 203 `${READELF} -s -W ${INFILE} | grep ' _SPUEAR_' | sort -k 2 | awk \
 204 '{ \
 205         print " .globl '${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) ":"; \
 209         print " .int " $2; \
 210 } \
 211 '`
 212 EOF
 213 }
 214
 215 main "$@"