2026-07-28 14:35:14 +08:00
|
|
|
|
#!/bin/sh
|
|
|
|
|
|
#
|
|
|
|
|
|
# init — Linux guest init script for UTSM dual-kernel Linux compat layer.
|
|
|
|
|
|
#
|
|
|
|
|
|
# Boot sequence:
|
|
|
|
|
|
# 1. Mount essential filesystems
|
|
|
|
|
|
# 2. Load UTSM driver (built-in, /dev/utsm auto-created)
|
|
|
|
|
|
# 3. Start utsm_exec_daemon (background)
|
|
|
|
|
|
# 4. Daemon sends EXEC_READY, then HLT (park) → linux_launch() returns to UTSM
|
|
|
|
|
|
# 5. UTSM proceeds to load DSK; Linux guest stays parked until shell
|
|
|
|
|
|
# invokes `linux <prog>` which triggers vmresume.
|
|
|
|
|
|
#
|
|
|
|
|
|
# The daemon runs forever, parking between requests. This init script
|
|
|
|
|
|
# should NOT exit (would panic the kernel); it sleeps indefinitely after
|
|
|
|
|
|
# starting the daemon so the kernel has a runnable init task.
|
|
|
|
|
|
|
|
|
|
|
|
PATH=/bin:/sbin:/usr/bin:/usr/sbin
|
|
|
|
|
|
export PATH
|
|
|
|
|
|
|
|
|
|
|
|
# Mount essential filesystems
|
|
|
|
|
|
mount -t proc none /proc 2>/dev/null
|
|
|
|
|
|
mount -t sysfs none /sys 2>/dev/null
|
|
|
|
|
|
mount -t devtmpfs none /dev 2>/dev/null
|
|
|
|
|
|
|
|
|
|
|
|
echo "[utsm-linux] init started"
|
|
|
|
|
|
echo "[utsm-linux] kernel: $(uname -r)"
|
|
|
|
|
|
|
|
|
|
|
|
# Verify /dev/utsm exists (driver is built-in, should be auto-created)
|
|
|
|
|
|
if [ ! -e /dev/utsm ]; then
|
|
|
|
|
|
echo "[utsm-linux] WARNING: /dev/utsm not found — UTSM driver not loaded"
|
|
|
|
|
|
fi
|
|
|
|
|
|
|
|
|
|
|
|
# Start the exec daemon in the background.
|
|
|
|
|
|
# The daemon sends EXEC_READY then HLTs (parks the guest).
|
|
|
|
|
|
# UTSM's linux_launch() returns after this first HLT.
|
2026-07-28 21:11:10 +08:00
|
|
|
|
if [ -x /bin/utsm_exec_daemon ]; then
|
|
|
|
|
|
echo "[utsm-linux] starting utsm_exec_daemon..."
|
|
|
|
|
|
/bin/utsm_exec_daemon &
|
|
|
|
|
|
DAEMON_PID=$!
|
|
|
|
|
|
echo "[utsm-linux] daemon PID=$DAEMON_PID"
|
|
|
|
|
|
else
|
|
|
|
|
|
# 无 daemon（第一阶段 bring-up 冒烟测试构建）：
|
|
|
|
|
|
# 直接在 ttyS0 上起交互 shell，验证 console 输入输出。
|
|
|
|
|
|
# 注意：此模式下 guest 不会 park，UTSM linux_launch() 不返回，
|
|
|
|
|
|
# 仅用于验证"Linux guest 进入 shell 提示符、可执行 uname -a"。
|
|
|
|
|
|
echo "[utsm-linux] WARNING: no daemon, starting interactive debug shell on ttyS0"
|
|
|
|
|
|
exec /bin/setsid /bin/cttyhack /bin/sh
|
|
|
|
|
|
fi
|
2026-07-28 14:35:14 +08:00
|
|
|
|
|
|
|
|
|
|
# init must not exit — sleep forever to keep the kernel happy.
|
|
|
|
|
|
# The daemon handles all UTSM exec requests; init just keeps the
|
|
|
|
|
|
# root task alive so the kernel doesn't panic.
|
|
|
|
|
|
echo "[utsm-linux] init: daemon running, entering idle hold"
|
|
|
|
|
|
while true; do
|
|
|
|
|
|
sleep 3600
|
|
|
|
|
|
done
|
