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#!/bin/sh
#
# SPDX-License-Identifier: BSD-3-Clause
#
# Copyright © 2019 Keith Packard
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
# OF THE POSSIBILITY OF SUCH DAMAGE.
#
qemu="qemu-system-riscv32"
# select the program
elf="$1"
shift
done=0
while [ $# -gt 0 -a $done -eq 0 ]; do
case "$1" in
--stdin)
if [ $# -lt 2 ]; then
echo "Error: --stdin requires a quoted string"
exit 1
fi
stdin="$2"
shift 2
;;
--args)
if [ $# -lt 2 ]; then
echo "Error: --args requires a quoted string"
exit 1
fi
args="$2"
shift 2
;;
*)
done=1
;;
esac
done
archstring=""
# If readelf is installed, we can use the .riscv.attributes section
# in the file to determine required extensions that we need in QEMU.
# This will give us a string such as "rv64i2p0_m2p0_a2p0_f2p0_d2p0_c2p0"
if command -v readelf >/dev/null 2>/dev/null; then
# LLVM-based toolchains readelf produces different output from GNU, so
# check --version output first.
if readelf --version | grep LLVM >/dev/null; then
archstring=$(readelf --arch-specific "$elf" | grep "Value: rv" | cut -d: -f2)
else
archstring=$(readelf --arch-specific "$elf" | grep Tag_RISCV_arch | cut -d: -f2 | tr -d '"')
fi
fi
if [ -z "$archstring" ]; then
echo "Could not determine architecture for $elf, is readelf installed?" >&2
exit 1
fi
if [ "${archstring#*rv64}" != "$archstring" ]; then
qemu="qemu-system-riscv64"
cpu="rv64"
elif [ "${archstring#*rv32}" != "$archstring" ]; then
qemu="qemu-system-riscv32"
cpu="rv32"
else
echo "Unknown architecture for $elf: $archstring" >&2
exit 1
fi
options="$(echo "$archstring" | sed 's/rv[36][24]//' | sed 's/_/ /g' | sed 's/[0-9]p[0-9]\>//g')"
qemu_version="$("$qemu" --version | grep version | sed 's/.*version \([0-9][0-9.]*\).*/\1/')"
cpu="$cpu,mmu=false,pmp=false"
if [ -z "$options" ]; then
options="$(echo "$elf" | sed 's/.*rv[36][24]\([a-z]*\)_.*$/\1/' | sed 's/\(.\)/\1 /g')"
fi
for o in $options; do
# Old versions of qemu don't have new extension subsets
case "$qemu_version" in
8*|7*)
case "$o" in
zmmul)
o=m
;;
zaamo|zalrsc|zawrs)
o=a
;;
esac
;;
esac
case "$o" in
zvl*)
# qemu doesn't list zvl extensions
;;
*)
cpu="$cpu,$o=true"
;;
esac
done
# qemu enables some options by defualt; we need to explicitly
# disable them when not selected
enabled_options="i h e g m a f d c s u v zifencei zihintpause"
# Add default enabled options for newer qemu versions
case "$qemu_version" in
8.[01]*|7*)
;;
*)
enabled_options="$enabled_options zawrs zfa zihintntl"
;;
esac
for enabled in $enabled_options; do
if echo "$options" | grep -q -w $enabled; then
:
else
cpu="$cpu,$enabled=false"
fi
done
# Map lower case options to upper case for qemu version 8.1 and earlier
case "$qemu_version" in
8.[01]*|7*)
cpu="$(echo "$cpu" | sed 's/\<z/Z/g')"
;;
esac
# Set the target machine
machine=virt,accel=tcg
# Map stdio to a multiplexed character device so we can use it
# for the monitor and semihosting output
chardev=stdio,mux=on,id=stdio0
# Point the semihosting driver at our new chardev
semi=enable=on,chardev=stdio0,arg="program-name $args"
# Disable monitor
mon=none
# Disable serial
serial=none
echo $stdin | \
"$qemu" \
-chardev $chardev \
-semihosting-config "$semi" \
-monitor "$mon" \
-serial "$serial" \
-machine "$machine" \
-cpu "$cpu" \
-kernel "$elf" \
-nographic \
-bios none \
-m 2G
|
