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