KProcess

class KProcess extends KSynchronizationObject and KSendableInterruptEvent;

Size : 0x270 (N3DS) / 0x268 bytes (O3DS post 8.x) / 0x260 bytes (O3DS pre 8.x). 0x4D8 bytes on ARM9. The only field that changed is the KProcessHwInfo member instance. The definition of KProcess remain identical in all cases.

The listed offsets are N3DS-only.

Offset	Type	Description
0x0	void**	Pointer to vtable
0x4	u32	Reference count
0x8	u32	Count of KThreads that sync with this object - number of nodes in the linked list below
0xC	KLinkedListNode*	Pointer to first KLinkedListNode in node list of KThreads that sync with this object
0x10	KLinkedListNode*	Pointer to last KLinkedListNode in node list of KThreads that sync with this object
0x14	KSendableInterruptEvent	Interrupt event (*this) sent to terminate the process
0x1C	KProcessHwInfo	Process hardware/context info. Used to manage segmentation, etc.
0x68	u32	Total size of all Thread Context pages owned by threads that belong to this process
0x6C	u32	Number of KThreadLocalPages used by this KProcess
0x70	KLinkedListNode*	Pointer to first KLinkedListNode in the list of KThreadLocalPages
0x74	KLinkedListNode*	Pointer to last KLinkedListNode in the list of KThreadLocalPages
0x78	u32	Unknown
0x7C	s32	Ideal processor for this process
0x80	KDebug*	KDebug object created from svc 0x60 to debug the process
0x84	KResourceLimit*	Pointer to resource limits for process.
0x88	u8	Normally 1 to indicate process is open/available. Set to 2 to indicate process is exiting/closing and 3 to indicate exited/closed.
0x89	u8	Process affinity mask
0x8A	u16	Unused, alignment
0x8C	s16	Number of threads which belong to this process.
0x8E	s16	Max number of threads which can belong to this process. This is always 0.
0x90	0x10-bytes	SVC access control mask from the exheader kernel descriptors. This is copied to the Thread Context area when creating threads, which is the actual data the SVC-handler checks for SVC-access-control.
0xA0	u32[4]	Interrupt flags- 32 interrupts per word, 4 words, 0x80 interrupts total divided evenly across 4 words
0xB0	u32	Kernel flags from the exheader kernel descriptors.
0xB4	u16	Handle table size from the exheader kernel descriptors. When this is 0, handle table is stored in WRAM.
0xB6	u16	Kernel release version field, from the exheader kernel descriptors.
0xB8	KCodeSet*	Pointer to KCodeSet instance
0xBC	u32	Process id, this always begins at 0x0 for the first process.
0xC0	s64	Process creation time as tick count
0xC8	KThread*	Pointer to the process's main thread.
0xCC	u32[4]	Interrupt enabled flags- 32 interrupts per word, 4 words, 0x80 interrupts total divided evenly across 4 words
0xDC	KProcessHandleTable	This is the data for tracking and using all of the KProcess's handles.
0x234	u32	Unused (From here up, everything is set to 0 on creation, has 0 written to it again during process creation, and is never used again.)
0x238	u64	Unused
0x240	u64	Unused
0x248	u64	Unused
0x250	u64	Unused
0x258	u64	Unused
0x260	u64	Unused
0x268	u64	Unused

KProcessHandleTable

Offset	Type	Description
0x0	HandleDescriptor*	Pointer to the process's handle table.
0x4	s16	The max number of handles that can be open at once - usually 0x200.
0x6	s16	The highest count of handles that have been open at once
0x8	HandleDescriptor*	Pointer to the next open HandleDescriptor entry in the handle table.
0xC	s16	Total handles used by this KProcess.
0xE	s16	The current number of handles in use.
0x10	KObjectMutex	Mutex
0x18	HandleDescriptor[0x28]	This small handle data table, internal to the KProcess, is only used in certain processes that don't have an external handle descriptor table in FCRAM. It is all zeros in most processes.

HandleDescriptor

Offset	Type	Description
0x0	u32	Handle info
0x4	u32	Pointer to the kernel object that the handle references.

The handle info u32 works as such:

The high byte is a remainder from the pointer to the next entry that originally occupied the handle table entry. It is unused. Byte 2 is either the class type token starting with firmware version 9.0 or the lowest byte of the char* that points to the class type name in firmware versions below 9.0. The lower halfword is the handle number of the current handle taken from the total handle count for the KProcess that owns the table.

On table creation, each entry in the handle data table is populated with a pointer to the next entry in the table. When a new handle is created, that pointer is moved into offset 0x8 of the KProcessHandleTable info struct to use for generation of the next handle.

The final handle that gets returned when a handle is created is (handle_index | (handle_total << 15)), basically they take the index into the handle data table and OR that with the total handle count << 15. This returned value is the one that gets passed back to the running application and is used to look up the HandleDescriptor entry in the table.