tools/calc_bss.sh

   1 #!/bin/bash
   2 # Given a list of header files, compute the bss index that results from
   3 # including them. (See prevent_bss_reordering.h for more information.)
   4
   5 TEMPC=$(mktemp -t bss.XXXXXXX.c)
   6 TEMPO=$(mktemp -t bss.XXXXXXX.o)
   7 trap "rm -f $TEMPC $TEMPO" EXIT
   8
   9 set -e
  10
  11 if [[ $# = 0 ]]; then
  12     echo "Usage: ./tools/calc_bss.sh file1.h file2.h ..." >&2
  13     exit 1
  14 fi
  15
  16 if [ -z "$QEMU_IRIX" ]; then
  17     echo "env variable QEMU_IRIX should point to the qemu-mips binary" >&2
  18     exit 1
  19 fi
  20
  21 if [ -z "$CROSS" ]; then
  22     CROSS=mips-linux-gnu-
  23 fi
  24
  25 # bss indexing starts at 3
  26 for I in {3..255}; do
  27     echo "char bss$I;" >> $TEMPC
  28 done
  29 for I in {0..2}; do
  30     echo "char bss$I;" >> $TEMPC
  31 done
  32
  33 while [[ $# -gt 0 ]]; do
  34     echo "#include \"$1\"" >> $TEMPC
  35     shift
  36 done
  37
  38 echo "char measurement;" >> $TEMPC
  39
  40 $QEMU_IRIX -silent -L $IRIX_ROOT $IRIX_ROOT/usr/bin/cc -c -non_shared -G 0 \
  41     -g -Xcpluscomm -mips2 -I $(pwd)/include/ $TEMPC -o $TEMPO
  42
  43 LINE=$(${CROSS}objdump -t $TEMPO | grep measurement | cut -d' ' -f1)
  44 NUM=$((0x$LINE - 1))
  45 echo "bss index: $NUM"