sm64pc/tools/calc_bss.sh
2019-08-25 00:46:40 -04:00

46 lines
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#!/bin/bash
# Given a list of header files, compute the bss index that results from
# including them. (See prevent_bss_reordering.h for more information.)
TEMPC=$(mktemp -t bss.XXXXXXX.c)
TEMPO=$(mktemp -t bss.XXXXXXX.o)
trap "rm -f $TEMPC $TEMPO" EXIT
set -e
if [[ $# = 0 ]]; then
echo "Usage: ./tools/calc_bss.sh file1.h file2.h ..." >&2
exit 1
fi
if [ -z "$QEMU_IRIX" ]; then
echo "env variable QEMU_IRIX should point to the qemu-mips binary" >&2
exit 1
fi
if [ -z "$CROSS" ]; then
CROSS=mips-linux-gnu-
fi
# bss indexing starts at 3
for I in {3..255}; do
echo "char bss$I;" >> $TEMPC
done
for I in {0..2}; do
echo "char bss$I;" >> $TEMPC
done
while [[ $# -gt 0 ]]; do
echo "#include \"$1\"" >> $TEMPC
shift
done
echo "char measurement;" >> $TEMPC
$QEMU_IRIX -silent -L $IRIX_ROOT $IRIX_ROOT/usr/bin/cc -c -non_shared -G 0 \
-g -Xcpluscomm -mips2 -I $(pwd)/include/ $TEMPC -o $TEMPO
LINE=$(${CROSS}objdump -t $TEMPO | grep measurement | cut -d' ' -f1)
NUM=$((0x$LINE - 1))
echo "bss index: $NUM"