Process Manager services

PM has a separate thread that is waiting for synchronization on process handles.

When the kernel signals a process handle, it uses svcResetSignal on the process handle and then it uses svcGetProcessInfo to read out the ProcessState.

If the process moved state non-3 -> 3 it clears bit4 in process flags.

If process flags has mask 8 set:

• If new state is 2, it clears 0x20 and sets 0x10 in process flags, and signals the ProcessEventWaiter handle.
• If new state is 4, it clears 0x20 and sets 0x10 in process flags, and signals the ProcessEventWaiter handle.
• If new state is 7, it sets 0x30 in process flags, and signals the ProcessEventWaiter handle.

If process flags has mask 1 set:

• If new state is 6, it signals the ProcessEventWaiter handle.

If mask 1 is not set, it immediately does what is otherwise done by the #FinalizeDeadProcess command.

pm:bm

Cmd	Name
0	GetMaintenanceMode
1	EnableMaintenanceMode

pm:dmnt

Cmd	Name
0	#GetZero
1	#GetProcessesWithFlag4
2	#StartProcess
3	GetProcessTitleIdByPid
4	.. Returns a handle.
5	GetCrashingProcessPid
6	.. Returns a handle.

GetZero

Always returns u32 0.

GetProcessesWithFlag4

Returns an array of pids of all processes that have mask 4 set in process flags.

StartProcess

Takes a pid. Process state must be 0 or 1. Then it uses svcStartProcess(process_handle, u8, u8, u32) with args coming from ldr:pm GetProgramInfo.

After that, it sets process state to 2.

pm:info

Cmd	Name
0	GetProcessTitleIdByPid

pm:shell

Cmd	Name
0	LaunchProcess
1	TerminateProcessByPid
2	TerminateProcessByTitleID
3	GetProcessEventWaiter
4	GetProcessEventType (0=CONTINUE, 1=CRASHING, 2,3,5)
5	#FinalizeDeadProcess
6	#ClearProcessCrashedFlag
7	#NotifyBootFinished
8	#GetCrashingProcessPid

FinalizeDeadProcess

Takes a pid as input. If the process with pid has the state "dead", it unregisters the pid in fsp:pr, sm:m, and ldr:pm.

Then it removes the process from PMs internal linked-list of active processes.

ClearProcessCrashedFlag

Takes a pid as input. Clears 0x10 from process flags.

NotifyBootFinished

Launches a process with hardcoded boot2 title-id.

GetCrashingProcessPid

Loops through the internal linked-list of processes, looks for mask 0x40 set in process flags. Returns pid of first such entry.