Difference between revisions of "IOSU syscalls"

Latest revision as of 03:07, 11 February 2024

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-{{stub}}
+#REDIRECT [[IOS]]
-There are 2 types of syscalls:
-. Syscalls using undefined ARM instruction.
-. Syscalls using ARM syscall instruction.
-== Syscalls (via undefined instructions) ==
-Syscalls are invoked by way of the invalid instruction handler; syscalls take the form 0xE7F000F0 | (syscall_num << 8). (E.g. E7F000F0 is syscall 0, E7F036F0 is syscall 0x36, etc.). IOS has 0x82 available syscalls.
-(please feel free to contribute your own findings!)
-{|border=1
-|-
-! ID # !! Internal name !! Description !! Return value
-|-
-|  C || int IOS_CreateMessageQueue(u32 *ptr, u32 n_msgs)  || Create a queue at ptr, for n_msgs messages || The queue ID
-|-
-| 10 || int IOS_ReceiveMessage(int queueid, u32 *message, u32 flags) || Fetch a message from the front of a queue || 0 on success
-|-
-| 24 || void* IOS_Alloc(int heapid, u32 size) || Allocate size bytes from the specified heap || pointer to memory
-|-
-| 28 || BOOL IOS_RegisterResourceManager(const char* device, int queueid) || Registers device to the device tree, so it can be opened (from Starlet and PPC) || 0 on success
-|-
-| 2D || int IOS_Open(const char* device, int mode) || Similar to IOS_Open on PPC, except now internal to the IOS system || Returns an fd or error (negative)
-|}