mirror of
https://github.com/switchbrew/libnx.git
synced 2025-06-21 12:32:40 +02:00
6ad0042147
- Service object moved away from sm.h and into its own file (sf/service.h) - Service object completely redesigned, but a (mostly) backwards compatible API was kept - New low level HIPC request/response code - New CMIF client-oriented code - New service IPC dispatch functions - Pointer buffer size automatically retrieved for all sessions - Removed previous manual pointer buffer size query code - SM rewritten with new IPC code - All other services are still pending IPC rewrite
364 lines
10 KiB
C
364 lines
10 KiB
C
/**
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* @file hipc.h
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* @brief Horizon Inter-Process Communication protocol
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* @author fincs
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* @author SciresM
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* @copyright libnx Authors
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*/
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#pragma once
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#include "../result.h"
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#include "../arm/tls.h"
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#include "../kernel/svc.h"
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#define HIPC_AUTO_RECV_STATIC UINT8_MAX
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#define HIPC_RESPONSE_NO_PID UINT32_MAX
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typedef struct HipcMetadata {
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u32 type;
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u32 num_send_statics;
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u32 num_send_buffers;
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u32 num_recv_buffers;
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u32 num_exch_buffers;
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u32 num_data_words;
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u32 num_recv_statics; // also accepts HIPC_AUTO_RECV_STATIC
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u32 send_pid;
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u32 num_copy_handles;
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u32 num_move_handles;
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} HipcMetadata;
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typedef struct HipcHeader {
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u32 type : 16;
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u32 num_send_statics : 4;
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u32 num_send_buffers : 4;
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u32 num_recv_buffers : 4;
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u32 num_exch_buffers : 4;
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u32 num_data_words : 10;
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u32 recv_static_mode : 4;
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u32 padding : 6;
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u32 recv_list_offset : 11; // Unused.
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u32 has_special_header : 1;
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} HipcHeader;
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typedef struct HipcSpecialHeader {
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u32 send_pid : 1;
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u32 num_copy_handles : 4;
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u32 num_move_handles : 4;
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u32 padding : 23;
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} HipcSpecialHeader;
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typedef struct HipcStaticDescriptor {
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u32 index : 6;
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u32 address_high : 6;
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u32 address_mid : 4;
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u32 size : 16;
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u32 address_low;
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} HipcStaticDescriptor;
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typedef struct HipcBufferDescriptor {
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u32 size_low;
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u32 address_low;
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u32 mode : 2;
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u32 address_high : 22;
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u32 size_high : 4;
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u32 address_mid : 4;
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} HipcBufferDescriptor;
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typedef struct HipcRecvListEntry {
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u32 address_low;
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u32 address_high : 16;
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u32 size : 16;
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} HipcRecvListEntry;
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typedef struct HipcRequest {
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HipcStaticDescriptor* send_statics;
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HipcBufferDescriptor* send_buffers;
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HipcBufferDescriptor* recv_buffers;
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HipcBufferDescriptor* exch_buffers;
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u32* data_words;
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HipcRecvListEntry* recv_list;
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Handle* copy_handles;
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Handle* move_handles;
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} HipcRequest;
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typedef struct HipcParsedRequest {
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HipcMetadata meta;
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HipcRequest data;
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u64 pid;
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} HipcParsedRequest;
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typedef struct HipcResponse {
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u64 pid;
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u32 num_statics;
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u32 num_data_words;
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u32 num_copy_handles;
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u32 num_move_handles;
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HipcStaticDescriptor* statics;
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u32* data_words;
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Handle* copy_handles;
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Handle* move_handles;
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} HipcResponse;
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typedef enum HipcBufferMode {
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HipcBufferMode_Normal = 0,
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HipcBufferMode_NonSecure = 1,
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HipcBufferMode_Invalid = 2,
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HipcBufferMode_NonDevice = 3,
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} HipcBufferMode;
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NX_CONSTEXPR HipcStaticDescriptor hipcMakeSendStatic(const void* buffer, size_t size, u8 index)
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{
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return (HipcStaticDescriptor){
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.index = index,
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.address_high = (u32)((uintptr_t)buffer >> 36),
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.address_mid = (u32)((uintptr_t)buffer >> 32),
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.size = (u32)size,
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.address_low = (u32)(uintptr_t)buffer,
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};
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}
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NX_CONSTEXPR HipcBufferDescriptor hipcMakeBuffer(const void* buffer, size_t size, HipcBufferMode mode)
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{
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return (HipcBufferDescriptor){
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.size_low = (u32)size,
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.address_low = (u32)(uintptr_t)buffer,
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.mode = mode,
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.address_high = (u32)((uintptr_t)buffer >> 36),
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.size_high = (u32)(size >> 32),
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.address_mid = (u32)((uintptr_t)buffer >> 32),
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};
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}
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NX_CONSTEXPR HipcRecvListEntry hipcMakeRecvStatic(void* buffer, size_t size)
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{
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return (HipcRecvListEntry){
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.address_low = (u32)((uintptr_t)buffer),
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.address_high = (u32)((uintptr_t)buffer >> 32),
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.size = (u32)size,
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};
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}
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NX_CONSTEXPR void* hipcGetStaticAddress(const HipcStaticDescriptor* desc)
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{
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return (void*)(desc->address_low | ((uintptr_t)desc->address_mid << 32) | ((uintptr_t)desc->address_high << 36));
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}
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NX_CONSTEXPR size_t hipcGetStaticSize(const HipcStaticDescriptor* desc)
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{
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return desc->size;
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}
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NX_CONSTEXPR void* hipcGetBufferAddress(const HipcBufferDescriptor* desc)
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{
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return (void*)(desc->address_low | ((uintptr_t)desc->address_mid << 32) | ((uintptr_t)desc->address_high << 36));
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}
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NX_CONSTEXPR size_t hipcGetBufferSize(const HipcBufferDescriptor* desc)
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{
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return desc->size_low | ((size_t)desc->size_high << 32);
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}
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NX_CONSTEXPR HipcRequest hipcCalcRequestLayout(HipcMetadata meta, void* base)
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{
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// Copy handles
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Handle* copy_handles = NULL;
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if (meta.num_copy_handles) {
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copy_handles = (Handle*)base;
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base = copy_handles + meta.num_copy_handles;
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}
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// Move handles
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Handle* move_handles = NULL;
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if (meta.num_move_handles) {
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move_handles = (Handle*)base;
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base = move_handles + meta.num_move_handles;
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}
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// Send statics
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HipcStaticDescriptor* send_statics = NULL;
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if (meta.num_send_statics) {
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send_statics = (HipcStaticDescriptor*)base;
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base = send_statics + meta.num_send_statics;
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}
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// Send buffers
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HipcBufferDescriptor* send_buffers = NULL;
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if (meta.num_send_buffers) {
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send_buffers = (HipcBufferDescriptor*)base;
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base = send_buffers + meta.num_send_buffers;
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}
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// Recv buffers
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HipcBufferDescriptor* recv_buffers = NULL;
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if (meta.num_recv_buffers) {
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recv_buffers = (HipcBufferDescriptor*)base;
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base = recv_buffers + meta.num_recv_buffers;
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}
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// Exch buffers
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HipcBufferDescriptor* exch_buffers = NULL;
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if (meta.num_exch_buffers) {
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exch_buffers = (HipcBufferDescriptor*)base;
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base = exch_buffers + meta.num_exch_buffers;
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}
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// Data words
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u32* data_words = NULL;
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if (meta.num_data_words) {
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data_words = (u32*)base;
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base = data_words + meta.num_data_words;
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}
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// Recv list
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HipcRecvListEntry* recv_list = NULL;
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if (meta.num_recv_statics)
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recv_list = (HipcRecvListEntry*)base;
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return (HipcRequest){
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.send_statics = send_statics,
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.send_buffers = send_buffers,
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.recv_buffers = recv_buffers,
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.exch_buffers = exch_buffers,
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.data_words = data_words,
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.recv_list = recv_list,
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.copy_handles = copy_handles,
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.move_handles = move_handles,
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};
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}
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NX_CONSTEXPR HipcRequest hipcMakeRequest(void* base, HipcMetadata meta)
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{
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// Write message header
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bool has_special_header = meta.send_pid || meta.num_copy_handles || meta.num_move_handles;
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HipcHeader* hdr = (HipcHeader*)base;
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base = hdr+1;
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*hdr = (HipcHeader){
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.type = meta.type,
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.num_send_statics = meta.num_send_statics,
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.num_send_buffers = meta.num_send_buffers,
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.num_recv_buffers = meta.num_recv_buffers,
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.num_exch_buffers = meta.num_exch_buffers,
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.num_data_words = meta.num_data_words,
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.recv_static_mode = meta.num_recv_statics ? (meta.num_recv_statics != HIPC_AUTO_RECV_STATIC ? 2u + meta.num_recv_statics : 2u) : 0u,
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.padding = 0,
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.recv_list_offset = 0,
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.has_special_header = has_special_header,
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};
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// Write special header
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if (has_special_header) {
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HipcSpecialHeader* sphdr = (HipcSpecialHeader*)base;
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base = sphdr+1;
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*sphdr = (HipcSpecialHeader){
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.send_pid = meta.send_pid,
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.num_copy_handles = meta.num_copy_handles,
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.num_move_handles = meta.num_move_handles,
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};
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if (meta.send_pid)
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base = (u8*)base + sizeof(u64);
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}
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// Calculate layout
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return hipcCalcRequestLayout(meta, base);
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}
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#define hipcMakeRequestInline(_base,...) hipcMakeRequest((_base),(HipcMetadata){ __VA_ARGS__ })
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NX_CONSTEXPR HipcParsedRequest hipcParseRequest(void* base)
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{
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// Parse message header
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HipcHeader hdr = {};
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__builtin_memcpy(&hdr, base, sizeof(hdr));
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base = (u8*)base + sizeof(hdr);
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u32 num_recv_statics = 0;
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u64 pid = 0;
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// Parse recv static mode
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if (hdr.recv_static_mode) {
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if (hdr.recv_static_mode == 2u)
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num_recv_statics = HIPC_AUTO_RECV_STATIC;
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else if (hdr.recv_static_mode > 2u)
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num_recv_statics = hdr.recv_static_mode - 2u;
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}
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// Parse special header
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HipcSpecialHeader sphdr = {};
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if (hdr.has_special_header) {
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__builtin_memcpy(&sphdr, base, sizeof(sphdr));
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base = (u8*)base + sizeof(sphdr);
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// Read PID descriptor
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if (sphdr.send_pid) {
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pid = *(u64*)base;
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base = (u8*)base + sizeof(u64);
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}
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}
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const HipcMetadata meta = {
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.type = hdr.type,
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.num_send_statics = hdr.num_send_statics,
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.num_send_buffers = hdr.num_send_buffers,
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.num_recv_buffers = hdr.num_recv_buffers,
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.num_exch_buffers = hdr.num_exch_buffers,
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.num_data_words = hdr.num_data_words,
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.num_recv_statics = num_recv_statics,
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.send_pid = sphdr.send_pid,
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.num_copy_handles = sphdr.num_copy_handles,
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.num_move_handles = sphdr.num_move_handles,
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};
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return (HipcParsedRequest){
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.meta = meta,
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.data = hipcCalcRequestLayout(meta, base),
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.pid = pid,
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};
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}
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NX_CONSTEXPR HipcResponse hipcParseResponse(void* base)
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{
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// Parse header
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HipcHeader hdr = {};
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__builtin_memcpy(&hdr, base, sizeof(hdr));
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base = (u8*)base + sizeof(hdr);
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// Initialize response
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HipcResponse response = {};
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response.num_statics = hdr.num_send_statics;
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response.num_data_words = hdr.num_data_words;
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response.pid = HIPC_RESPONSE_NO_PID;
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// Parse special header
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if (hdr.has_special_header)
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{
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HipcSpecialHeader sphdr = {};
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__builtin_memcpy(&sphdr, base, sizeof(sphdr));
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base = (u8*)base + sizeof(sphdr);
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// Update response
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response.num_copy_handles = sphdr.num_copy_handles;
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response.num_move_handles = sphdr.num_move_handles;
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// Parse PID descriptor
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if (sphdr.send_pid) {
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response.pid = *(u64*)base;
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base = (u8*)base + sizeof(u64);
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}
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}
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// Copy handles
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response.copy_handles = (Handle*)base;
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base = response.copy_handles + response.num_copy_handles;
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// Move handles
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response.move_handles = (Handle*)base;
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base = response.move_handles + response.num_move_handles;
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// Send statics
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response.statics = (HipcStaticDescriptor*)base;
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base = response.statics + response.num_statics;
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// Data words
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response.data_words = (u32*)base;
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return response;
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}
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