Difference between revisions of "Services"

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(Service Manager Port "srv:")
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| 0x04030082
 
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| (u32 procid, u32 wordsz, <nowiki>((wordsz<<16) | 2)</nowiki>, serviceaccesscontrol*) Register.
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| RegisterProcess (u32 procid, u32 wordsz, <nowiki>((wordsz<<16) | 2)</nowiki>, serviceaccesscontrol*).
 
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| 0x04040040
 
| 0x04040040
| (u32 procid) Unregister.
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| UnregisterProcess (u32 procid).
 
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Revision as of 01:20, 22 August 2014

Handles for services are retrieved from the service manager port, "srv:". Services are an abstraction of ports, they operate the same way except regular ports can have their handles retrieved directly from a SVC(svcConnectToPort).

Processes with PID less than or equal to the number of NATIVE_FIRM built-in modules (fs, sm, pm, pxi, ldr) have access to all services.

Service Manager Port "srv:"

Command Header Description
0x00010002 Initialize
0x00020000 GetProcSemaphore (the handle from this gets signaled when notifications for this process gets triggered)
0x00030100 RegisterService (8-byte servicename, u32 strlen, u32 flags?)
0x000400C0 UnregisterService (8-byte servicename, u32 strlen)
0x00050100 GetServiceHandle (same input as RegisterService)
0x000600c2 RegisterHandle? (8-byte servicename, u32 strlen,Handel h)
0x0007.... UnregisterHandle? (same input as UnregisterService)
0x0008.... ishandlepresent (8-byte servicename, u32 strlen,u32 flags) if flag is set it returns the handle?
0x00090040 IsRegistered This enables the specified notificationID for the current process.
0x000A.... This disable the specified notificationID for the current process (u32 ID)
0x000B0000 ReceiveNotification
0x000C0080 PublishToSubscriber
0x000D.... ?can fire notificationIDs and return the number of fired notificationID
0x000E.... returns 1 if the service is registered. 0 if not (8-byte servicename, u32 strlen)

Service Manager Process-Manager Port "srv:pm"

Command Header, prior to 7.0.0-13 Description
0x04030082 RegisterProcess (u32 procid, u32 wordsz, ((wordsz<<16) | 2), serviceaccesscontrol*).
0x04040040 UnregisterProcess (u32 procid).

The Register command registers a process with the service-manager, which includes registering the serviceaccesscontrol for the process which normally originates from the exheader.

Prior to to 7.0.0-13, the commands listed for "srv:" were also accessible under this port with the same command-headers. Starting with 7.0.0-13, the "srv:pm" port was changed to a service. With this change, commandIDs for these commands were changed. "srv:pm" was originally vulnerable, this was fixed with 7.0.0-13, see here. Originally any process could use "srv:pm", however starting with 7.0.0-13 only the built-in NATIVE_FIRM sysmodules have access to it. The only system title which uses "srv:pm" is the Process Manager.

Notifications

ID Description
0x100 This indicates that all processes must terminate: power-off, reboot, or FIRM-launch.
0x204 This indicates that the HOME button was pressed.