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Atmosphere/emummc/source/nx/svc.h

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/**
* @file svc.h
* @brief Wrappers for kernel syscalls.
* @copyright libnx Authors
*/
#pragma once
#include "../utils/types.h"
/// Memory information structure.
typedef struct {
u64 addr; ///< Base address.
u64 size; ///< Size.
u32 type; ///< Memory type (see lower 8 bits of \ref MemoryState).
u32 attr; ///< Memory attributes (see \ref MemoryAttribute).
u32 perm; ///< Memory permissions (see \ref Permission).
u32 device_refcount; ///< Device reference count.
u32 ipc_refcount; ///< IPC reference count.
u32 padding; ///< Padding.
} MemoryInfo;
/// Memory permission bitmasks.
typedef enum {
Perm_None = 0, ///< No permissions.
Perm_R = BIT(0), ///< Read permission.
Perm_W = BIT(1), ///< Write permission.
Perm_X = BIT(2), ///< Execute permission.
Perm_Rw = Perm_R | Perm_W, ///< Read/write permissions.
Perm_Rx = Perm_R | Perm_X, ///< Read/execute permissions.
Perm_DontCare = BIT(28), ///< Don't care
} Permission;
/// Secure monitor arguments.
typedef struct {
u64 X[8]; ///< Values of X0 through X7.
} SecmonArgs;
_Static_assert(sizeof(SecmonArgs) == 0x40, "SecmonArgs definition");
#define DeviceName_SDMMC1A 19
#define DeviceName_SDMMC2A 20
#define DeviceName_SDMMC3A 21
#define DeviceName_SDMMC4A 22
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Returns a virtual address mapped to a given IO range.
* @return Result code.
* @note Syscall number 0x55.
* @warning This is a privileged syscall. Use \ref envIsSyscallHinted to check if it is available.
*/
Result svcQueryIoMapping(u64* virtaddr, u64 physaddr, u64 size);
/**
* @brief Attaches a device address space to a device.
* @return Result code.
* @note Syscall number 0x57.
* @warning This is a privileged syscall. Use \ref envIsSyscallHinted to check if it is available.
*/
Result svcAttachDeviceAddressSpace(u64 device, Handle handle);
/**
* @brief Query information about an address. Will always fetch the lowest page-aligned mapping that contains the provided address.
* @param[out] meminfo_ptr \ref MemoryInfo structure which will be filled in.
* @param[out] pageinfo Page information which will be filled in.
* @param[in] addr Address to query.
* @return Result code.
* @note Syscall number 0x06.
*/
Result svcQueryMemory(MemoryInfo* meminfo_ptr, u32 *pageinfo, u64 addr);
/**
* @brief Sets the memory permissions for the specified memory with the supplied process handle.
* @param[in] proc Process handle.
* @param[in] addr Address of the memory.
* @param[in] size Size of the memory.
* @param[in] perm Permissions (see \ref Permission).
* @return Result code.
* @remark This returns an error (0xD801) when \p perm is >0x5, hence -WX and RWX are not allowed.
* @note Syscall number 0x73.
* @warning This is a privileged syscall. Use \ref envIsSyscallHinted to check if it is available.
*/
Result svcSetProcessMemoryPermission(Handle proc, u64 addr, u64 size, u32 perm);
/**
* @brief Set the memory permissions of a (page-aligned) range of memory.
* @param[in] addr Start address of the range.
* @param[in] size Size of the range, in bytes.
* @param[in] perm Permissions (see \ref Permission).
* @return Result code.
* @remark Perm_X is not allowed. Setting write-only is not allowed either (Perm_W).
* This can be used to move back and forth between Perm_None, Perm_R and Perm_Rw.
* @note Syscall number 0x01.
*/
Result svcSetMemoryPermission(void* addr, u64 size, u32 perm);
/**
* @brief Calls a secure monitor function (TrustZone, EL3).
* @param regs Arguments to pass to the secure monitor.
* @return Return value from the secure monitor.
* @note Syscall number 0x7F.
* @warning This is a privileged syscall. Use \ref envIsSyscallHinted to check if it is available.
*/
u64 svcCallSecureMonitor(SecmonArgs* regs);
#ifdef __cplusplus
}
#endif
///@}