− | The IPC commands are written to the Thread Local Storage, at offset 0x80. Every IPC command sent to services starts with a u32 header code, and parameters, if any, are written after this header. If the kernel was able to dispatch the request, the server replies with an error code at TLS+0x84, and after this code there is the response data, if any. | + | The IPC commands are written to the Thread Local Storage, at offset 0x80. Every IPC command sent to services starts with a u32 header code, and parameters, if any, are written after this header. If the kernel was able to dispatch the request, the server reply will be written to TLS+0x80. Often the first word of the response data is the error code (or 0 if success). |