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@ -4,13 +4,10 @@ |
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{ config, lib, pkgs, ... }: |
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with lib; |
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with import ../../lib/qemu-flags.nix { inherit pkgs; }; |
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let |
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kernel = config.boot.kernelPackages.kernel; |
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# FIXME: figure out a common place for this instead of copy pasting |
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serialDevice = if pkgs.stdenv.isi686 || pkgs.stdenv.isx86_64 then "ttyS0" |
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else if pkgs.stdenv.isArm || pkgs.stdenv.isAarch64 then "ttyAMA0" |
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else throw "Unknown QEMU serial device for system '${pkgs.stdenv.system}'"; |
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in |
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{ |
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@ -28,8 +25,8 @@ in |
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systemd.services.backdoor = |
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{ wantedBy = [ "multi-user.target" ]; |
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requires = [ "dev-hvc0.device" "dev-${serialDevice}.device" ]; |
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after = [ "dev-hvc0.device" "dev-${serialDevice}.device" ]; |
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requires = [ "dev-hvc0.device" "dev-${qemuSerialDevice}.device" ]; |
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after = [ "dev-hvc0.device" "dev-${qemuSerialDevice}.device" ]; |
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script = |
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'' |
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export USER=root |
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@ -46,7 +43,7 @@ in |
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cd /tmp |
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exec < /dev/hvc0 > /dev/hvc0 |
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while ! exec 2> /dev/${serialDevice}; do sleep 0.1; done |
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while ! exec 2> /dev/${qemuSerialDevice}; do sleep 0.1; done |
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echo "connecting to host..." >&2 |
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stty -F /dev/hvc0 raw -echo # prevent nl -> cr/nl conversion |
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echo |
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@ -55,10 +52,10 @@ in |
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serviceConfig.KillSignal = "SIGHUP"; |
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}; |
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# Prevent agetty from being instantiated on ${serialDevice}, since it |
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# interferes with the backdoor (writes to ${serialDevice} will randomly fail |
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# Prevent agetty from being instantiated on the serial device, since it |
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# interferes with the backdoor (writes to it will randomly fail |
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# with EIO). Likewise for hvc0. |
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systemd.services."serial-getty@${serialDevice}".enable = false; |
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systemd.services."serial-getty@${qemuSerialDevice}".enable = false; |
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systemd.services."serial-getty@hvc0".enable = false; |
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boot.initrd.preDeviceCommands = |
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@ -94,7 +91,7 @@ in |
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# Panic if an error occurs in stage 1 (rather than waiting for |
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# user intervention). |
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boot.kernelParams = |
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[ "console=${serialDevice}" "panic=1" "boot.panic_on_fail" ]; |
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[ "console=${qemuSerialDevice}" "panic=1" "boot.panic_on_fail" ]; |
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# `xwininfo' is used by the test driver to query open windows. |
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environment.systemPackages = [ pkgs.xorg.xwininfo ]; |
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