mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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300 lines
13 KiB
C++
300 lines
13 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern {
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Result KCapabilities::Initialize(const u32 *caps, s32 num_caps, KProcessPageTable *page_table) {
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/* We're initializing an initial process. */
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/* Most fields have already been cleared by our constructor. */
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/* Initial processes may run on all cores. */
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this->core_mask = (1ul << cpu::NumCores) - 1;
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/* Initial processes may use any user priority they like. */
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this->priority_mask = ~0xFul;
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/* TODO: Here, Nintendo sets the kernel version to (current kernel version). */
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/* How should we handle this? Not a MESOSPHERE_TODO because it's not critical. */
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/* Parse the capabilities array. */
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return this->SetCapabilities(caps, num_caps, page_table);
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}
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Result KCapabilities::Initialize(svc::KUserPointer<const u32 *> user_caps, s32 num_caps, KProcessPageTable *page_table) {
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/* We're initializing a user process. */
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/* Most fields have already been cleared by our constructor. */
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/* Parse the user capabilities array. */
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return this->SetCapabilities(user_caps, num_caps, page_table);
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}
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Result KCapabilities::SetCorePriorityCapability(const util::BitPack32 cap) {
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/* We can't set core/priority if we've already set them. */
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R_UNLESS(this->core_mask == 0, svc::ResultInvalidArgument());
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R_UNLESS(this->priority_mask == 0, svc::ResultInvalidArgument());
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/* Validate the core/priority. */
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const auto min_core = cap.Get<CorePriority::MinimumCoreId>();
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const auto max_core = cap.Get<CorePriority::MaximumCoreId>();
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const auto max_prio = cap.Get<CorePriority::LowestThreadPriority>();
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const auto min_prio = cap.Get<CorePriority::HighestThreadPriority>();
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R_UNLESS(min_core <= max_core, svc::ResultInvalidCombination());
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R_UNLESS(min_prio <= max_prio, svc::ResultInvalidCombination());
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R_UNLESS(max_core < cpu::NumCores, svc::ResultInvalidCoreId());
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MESOSPHERE_ASSERT(max_core < BITSIZEOF(u64));
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MESOSPHERE_ASSERT(max_prio < BITSIZEOF(u64));
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/* Set core mask. */
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for (auto core_id = min_core; core_id <= max_core; core_id++) {
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this->core_mask |= (1ul << core_id);
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}
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MESOSPHERE_ASSERT((this->core_mask & ((1ul << cpu::NumCores) - 1)) == this->core_mask);
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/* Set priority mask. */
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for (auto prio = min_prio; prio <= max_prio; prio++) {
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this->priority_mask |= (1ul << prio);
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}
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/* We must have some core/priority we can use. */
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R_UNLESS(this->core_mask != 0, svc::ResultInvalidArgument());
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R_UNLESS(this->priority_mask != 0, svc::ResultInvalidArgument());
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return ResultSuccess();
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}
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Result KCapabilities::SetSyscallMaskCapability(const util::BitPack32 cap, u32 &set_svc) {
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/* Validate the index. */
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const auto mask = cap.Get<SyscallMask::Mask>();
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const auto index = cap.Get<SyscallMask::Index>();
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const u32 index_flag = (1u << index);
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R_UNLESS((set_svc & index_flag) == 0, svc::ResultInvalidCombination());
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set_svc |= index_flag;
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/* Set SVCs. */
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for (size_t i = 0; i < SyscallMask::Mask::Count; i++) {
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const u32 svc_id = SyscallMask::Mask::Count * index + i;
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if (mask & (1u << i)) {
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R_UNLESS(this->SetSvcAllowed(svc_id), svc::ResultOutOfRange());
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}
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}
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return ResultSuccess();
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}
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Result KCapabilities::MapRange(const util::BitPack32 cap, const util::BitPack32 size_cap, KProcessPageTable *page_table) {
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/* Validate reserved bits are unused. */
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R_UNLESS(size_cap.Get<MapRangeSize::Reserved>() == 0, svc::ResultOutOfRange());
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/* Get/validate address/size */
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const u64 phys_addr = cap.Get<MapRange::Address>() * PageSize;
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const size_t num_pages = size_cap.Get<MapRangeSize::Pages>();
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const size_t size = num_pages * PageSize;
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R_UNLESS(phys_addr == GetInteger(KPhysicalAddress(phys_addr)), svc::ResultInvalidAddress());
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R_UNLESS(num_pages != 0, svc::ResultInvalidSize());
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R_UNLESS(phys_addr < phys_addr + size, svc::ResultInvalidAddress());
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R_UNLESS(((phys_addr + size - 1) & ~PhysicalMapAllowedMask) == 0, svc::ResultInvalidAddress());
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/* Do the mapping. */
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const KMemoryPermission perm = cap.Get<MapRange::ReadOnly>() ? KMemoryPermission_UserRead : KMemoryPermission_UserReadWrite;
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if (size_cap.Get<MapRangeSize::Normal>()) {
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return page_table->MapStatic(phys_addr, size, perm);
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} else {
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return page_table->MapIo(phys_addr, size, perm);
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}
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}
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Result KCapabilities::MapIoPage(const util::BitPack32 cap, KProcessPageTable *page_table) {
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/* Get/validate address/size */
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const u64 phys_addr = cap.Get<MapIoPage::Address>() * PageSize;
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const size_t num_pages = 1;
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const size_t size = num_pages * PageSize;
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R_UNLESS(phys_addr == GetInteger(KPhysicalAddress(phys_addr)), svc::ResultInvalidAddress());
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R_UNLESS(num_pages != 0, svc::ResultInvalidSize());
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R_UNLESS(phys_addr < phys_addr + size, svc::ResultInvalidAddress());
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R_UNLESS(((phys_addr + size - 1) & ~PhysicalMapAllowedMask) == 0, svc::ResultInvalidAddress());
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/* Do the mapping. */
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return page_table->MapIo(phys_addr, size, KMemoryPermission_UserReadWrite);
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}
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Result KCapabilities::MapRegion(const util::BitPack32 cap, KProcessPageTable *page_table) {
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/* Define the allowed memory regions. */
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constexpr KMemoryRegionType MemoryRegions[] = {
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KMemoryRegionType_None,
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KMemoryRegionType_KernelTraceBuffer,
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KMemoryRegionType_OnMemoryBootImage,
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KMemoryRegionType_DTB,
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};
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/* Extract regions/read only. */
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const RegionType types[3] = { cap.Get<MapRegion::Region0>(), cap.Get<MapRegion::Region1>(), cap.Get<MapRegion::Region2>(), };
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const bool ro[3] = { cap.Get<MapRegion::ReadOnly0>(), cap.Get<MapRegion::ReadOnly1>(), cap.Get<MapRegion::ReadOnly2>(), };
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for (size_t i = 0; i < util::size(types); i++) {
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const auto type = types[i];
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const auto perm = ro[i] ? KMemoryPermission_UserRead : KMemoryPermission_UserReadWrite;
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switch (type) {
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case RegionType::None:
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break;
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case RegionType::KernelTraceBuffer:
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case RegionType::OnMemoryBootImage:
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case RegionType::DTB:
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R_TRY(page_table->MapRegion(MemoryRegions[static_cast<u32>(type)], perm));
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default:
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return svc::ResultNotFound();
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}
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}
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return ResultSuccess();
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}
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Result KCapabilities::SetInterruptPairCapability(const util::BitPack32 cap) {
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/* Extract interrupts. */
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const u32 ids[2] = { cap.Get<InterruptPair::InterruptId0>(), cap.Get<InterruptPair::InterruptId1>(), };
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for (size_t i = 0; i < util::size(ids); i++) {
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if (ids[i] != PaddingInterruptId) {
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R_UNLESS(Kernel::GetInterruptManager().IsInterruptDefined(ids[i]), svc::ResultOutOfRange());
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R_UNLESS(this->SetInterruptPermitted(ids[i]), svc::ResultOutOfRange());
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}
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}
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return ResultSuccess();
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}
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Result KCapabilities::SetProgramTypeCapability(const util::BitPack32 cap) {
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/* Validate. */
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R_UNLESS(cap.Get<ProgramType::Reserved>() == 0, svc::ResultReservedUsed());
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this->program_type = cap.Get<ProgramType::Type>();
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return ResultSuccess();
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}
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Result KCapabilities::SetKernelVersionCapability(const util::BitPack32 cap) {
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/* Ensure we haven't set our version before. */
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R_UNLESS(this->intended_kernel_version.Get<KernelVersion::MajorVersion>() == 0, svc::ResultInvalidArgument());
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/* Set, ensure that we set a valid version. */
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this->intended_kernel_version = cap;
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R_UNLESS(this->intended_kernel_version.Get<KernelVersion::MajorVersion>() != 0, svc::ResultInvalidArgument());
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return ResultSuccess();
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}
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Result KCapabilities::SetHandleTableCapability(const util::BitPack32 cap) {
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/* Validate. */
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R_UNLESS(cap.Get<HandleTable::Reserved>() == 0, svc::ResultReservedUsed());
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this->handle_table_size = cap.Get<HandleTable::Size>();
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return ResultSuccess();
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}
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Result KCapabilities::SetDebugFlagsCapability(const util::BitPack32 cap) {
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/* Validate. */
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R_UNLESS(cap.Get<DebugFlags::Reserved>() == 0, svc::ResultReservedUsed());
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this->debug_capabilities.Set<DebugFlags::AllowDebug>(cap.Get<DebugFlags::AllowDebug>());
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this->debug_capabilities.Set<DebugFlags::ForceDebug>(cap.Get<DebugFlags::ForceDebug>());
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return ResultSuccess();
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}
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Result KCapabilities::SetCapability(const util::BitPack32 cap, u32 &set_flags, u32 &set_svc, KProcessPageTable *page_table) {
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/* Validate this is a capability we can act on. */
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const auto type = GetCapabilityType(cap);
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R_UNLESS(type != CapabilityType::Invalid, svc::ResultInvalidArgument());
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/* If the type is padding, we have no work to do. */
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R_SUCCEED_IF(type == CapabilityType::Padding);
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/* Check that we haven't already processed this capability. */
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const auto flag = GetCapabilityFlag(type);
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R_UNLESS(((set_flags & InitializeOnceFlags) & flag) == 0, svc::ResultInvalidCombination());
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set_flags |= flag;
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/* Process the capability. */
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switch (type) {
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case CapabilityType::CorePriority: return this->SetCorePriorityCapability(cap);
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case CapabilityType::SyscallMask: return this->SetSyscallMaskCapability(cap, set_svc);
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case CapabilityType::MapIoPage: return this->MapIoPage(cap, page_table);
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case CapabilityType::MapRegion: return this->MapRegion(cap, page_table);
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case CapabilityType::InterruptPair: return this->SetInterruptPairCapability(cap);
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case CapabilityType::ProgramType: return this->SetProgramTypeCapability(cap);
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case CapabilityType::KernelVersion: return this->SetKernelVersionCapability(cap);
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case CapabilityType::HandleTable: return this->SetHandleTableCapability(cap);
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case CapabilityType::DebugFlags: return this->SetDebugFlagsCapability(cap);
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default: return svc::ResultInvalidArgument();
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}
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}
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Result KCapabilities::SetCapabilities(const u32 *caps, s32 num_caps, KProcessPageTable *page_table) {
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u32 set_flags = 0, set_svc = 0;
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for (s32 i = 0; i < num_caps; i++) {
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const util::BitPack32 cap = { caps[i] };
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if (GetCapabilityType(cap) == CapabilityType::MapRange) {
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/* Check that the pair cap exists. */
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R_UNLESS((++i) < num_caps, svc::ResultInvalidCombination());
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/* Check the pair cap is a map range cap. */
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const util::BitPack32 size_cap = { caps[i] };
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R_UNLESS(GetCapabilityType(size_cap) == CapabilityType::MapRange, svc::ResultInvalidCombination());
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/* Map the range. */
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R_TRY(this->MapRange(cap, size_cap, page_table));
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} else {
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R_TRY(this->SetCapability(cap, set_flags, set_svc, page_table));
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}
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}
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return ResultSuccess();
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}
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Result KCapabilities::SetCapabilities(svc::KUserPointer<const u32 *> user_caps, s32 num_caps, KProcessPageTable *page_table) {
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u32 set_flags = 0, set_svc = 0;
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for (s32 i = 0; i < num_caps; i++) {
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/* Read the cap from userspace. */
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u32 cap0;
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R_TRY(user_caps.CopyArrayElementTo(std::addressof(cap0), i));
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const util::BitPack32 cap = { cap0 };
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if (GetCapabilityType(cap) == CapabilityType::MapRange) {
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/* Check that the pair cap exists. */
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R_UNLESS((++i) < num_caps, svc::ResultInvalidCombination());
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/* Read the second cap from userspace. */
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u32 cap1;
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R_TRY(user_caps.CopyArrayElementTo(std::addressof(cap1), i));
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/* Check the pair cap is a map range cap. */
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const util::BitPack32 size_cap = { cap1 };
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R_UNLESS(GetCapabilityType(size_cap) == CapabilityType::MapRange, svc::ResultInvalidCombination());
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/* Map the range. */
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R_TRY(this->MapRange(cap, size_cap, page_table));
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} else {
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R_TRY(this->SetCapability(cap, set_flags, set_svc, page_table));
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}
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}
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return ResultSuccess();
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}
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}
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