scripts/run-mips

#!/bin/sh
#
# SPDX-License-Identifier: BSD-3-Clause
#
# Copyright © 2020 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
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# OF THE POSSIBILITY OF SUCH DAMAGE.
#

dir="$(dirname "$0")"

# select the program
elf="$1"
shift

qemu="qemu-system-mips"

if file "$elf" | grep -q LSB; then
    qemu="qemu-system-mipsel"
fi

cpu=24Kf

# 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

cmdline="program-name"
input=""
done=0

while [ "$done" != "1" ]; do
    case "$1" in
        --)
            shift
            done=1
            ;;
        -s|"")
            done=1
            ;;
        *)
            cmdline="$cmdline $1"
            case "$input" in
                "")
                    input="$1"
                    ;;
                *)
                    input="$input $1"
                    ;;
            esac
            shift
            ;;
    esac
done

semi=enable=on,chardev=stdio0,arg="$cmdline"

# Point the monitor at the new chardev too

mon=none

# Disable the serial port

serial=none

echo "$input" | $qemu \
  -chardev $chardev \
  -semihosting-config "$semi" \
  -machine malta \
  -cpu $cpu \
  -serial null \
  -serial null \
  -serial "$serial" \
  -monitor "$mon" \
  -net none \
  -nographic \
  -kernel "$elf" "$@"