Atmosphere/libraries/libstratosphere/source/fssrv/impl/fssrv_program_info.cpp
2022-02-21 15:17:17 -08:00

119 lines
5.2 KiB
C++

/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "fssrv_program_info.hpp"
namespace ams::fssrv::impl {
namespace {
constinit os::SdkMutex g_mutex;
constinit bool g_initialized = false;
constinit u64 g_initial_process_id_min = 0;
constinit u64 g_initial_process_id_max = 0;
constinit u64 g_current_process_id = 0;
constinit std::aligned_storage<0x80>::type g_static_buffer_for_program_info_for_initial_process;
template<typename T>
class StaticAllocatorForProgramInfoForInitialProcess : public std::allocator<T> {
public:
StaticAllocatorForProgramInfoForInitialProcess() { /* ... */ }
template<typename U>
StaticAllocatorForProgramInfoForInitialProcess(const StaticAllocatorForProgramInfoForInitialProcess<U> &) { /* ... */ }
template<typename U>
struct rebind {
using other = StaticAllocatorForProgramInfoForInitialProcess<U>;
};
[[nodiscard]] T *allocate(::std::size_t n) {
AMS_ABORT_UNLESS(sizeof(T) * n <= sizeof(g_static_buffer_for_program_info_for_initial_process));
return reinterpret_cast<T *>(std::addressof(g_static_buffer_for_program_info_for_initial_process));
}
void deallocate(T *p, ::std::size_t n) {
AMS_UNUSED(p, n);
}
};
constexpr const u32 FileAccessControlForInitialProgram[0x1C / sizeof(u32)] = {0x00000001, 0x00000000, 0x80000000, 0x0000001C, 0x00000000, 0x0000001C, 0x00000000};
constexpr const u32 FileAccessControlDescForInitialProgram[0x2C / sizeof(u32)] = {0x00000001, 0x00000000, 0x80000000, 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF};
ALWAYS_INLINE void InitializeInitialAndCurrentProcessId() {
if (AMS_UNLIKELY(!g_initialized)) {
std::scoped_lock lk(g_mutex);
if (AMS_LIKELY(!g_initialized)) {
/* Get initial process id range. */
R_ABORT_UNLESS(svc::GetSystemInfo(std::addressof(g_initial_process_id_min), svc::SystemInfoType_InitialProcessIdRange, svc::InvalidHandle, svc::InitialProcessIdRangeInfo_Minimum));
R_ABORT_UNLESS(svc::GetSystemInfo(std::addressof(g_initial_process_id_max), svc::SystemInfoType_InitialProcessIdRange, svc::InvalidHandle, svc::InitialProcessIdRangeInfo_Maximum));
AMS_ABORT_UNLESS(0 < g_initial_process_id_min);
AMS_ABORT_UNLESS(g_initial_process_id_min <= g_initial_process_id_max);
/* Get current procss id. */
R_ABORT_UNLESS(svc::GetProcessId(std::addressof(g_current_process_id), svc::PseudoHandle::CurrentProcess));
/* Set initialized. */
g_initialized = true;
}
}
}
}
std::shared_ptr<ProgramInfo> ProgramInfo::GetProgramInfoForInitialProcess() {
static constinit os::SdkMutex s_mutex;
static constinit bool s_initialized = false;
static constinit std::shared_ptr<ProgramInfo> s_initial_program_info = nullptr;
/* Ensure we've initialized the program info. */
if (AMS_UNLIKELY(!s_initialized)) {
std::scoped_lock lk(s_mutex);
if (AMS_LIKELY(!s_initialized)) {
class ProgramInfoHelper : public ProgramInfo {
public:
ProgramInfoHelper(const void *data, s64 data_size, const void *desc, s64 desc_size) : ProgramInfo(data, data_size, desc, desc_size) { /* ... */ }
};
s_initial_program_info = std::allocate_shared<ProgramInfoHelper>(StaticAllocatorForProgramInfoForInitialProcess<char>{}, FileAccessControlForInitialProgram, sizeof(FileAccessControlForInitialProgram), FileAccessControlDescForInitialProgram, sizeof(FileAccessControlDescForInitialProgram));
s_initialized = true;
}
}
return s_initial_program_info;
}
bool IsInitialProgram(u64 process_id) {
/* Initialize/sanity check. */
InitializeInitialAndCurrentProcessId();
AMS_ABORT_UNLESS(g_initial_process_id_min > 0);
/* Check process id in range. */
return g_initial_process_id_min <= process_id && process_id <= g_initial_process_id_max;
}
bool IsCurrentProcess(u64 process_id) {
/* Initialize. */
InitializeInitialAndCurrentProcessId();
return process_id == g_current_process_id;
}
}