mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-09-19 21:43:29 +01:00
429 lines
15 KiB
C++
429 lines
15 KiB
C++
/*
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* Copyright (c) 2018-2019 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 "ldr_capabilities.hpp"
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namespace sts::ldr {
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namespace {
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/* Types. */
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enum class CapabilityId {
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KernelFlags = 3,
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SyscallMask = 4,
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MapRange = 6,
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MapPage = 7,
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InterruptPair = 11,
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ApplicationType = 13,
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KernelVersion = 14,
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HandleTable = 15,
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DebugFlags = 16,
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Empty = 32,
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};
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constexpr CapabilityId GetCapabilityId(u32 cap) {
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return static_cast<CapabilityId>(__builtin_ctz(~cap));
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}
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template<CapabilityId id>
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class Capability {
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public:
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static constexpr u32 ValueShift = static_cast<u32>(id) + 1;
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static constexpr u32 IdMask = (1u << (ValueShift - 1)) - 1;
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private:
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u32 value;
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public:
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Capability(u32 v) : value(v) { /* ... */ }
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CapabilityId GetId() const {
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return id;
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}
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u32 GetValue() const {
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return this->value >> ValueShift;
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}
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};
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#define CAPABILITY_CLASS_NAME(id) Capability##id
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#define CAPABILITY_BASE_CLASS(id) Capability<CapabilityId::id>
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#define DEFINE_CAPABILITY_CLASS(id, member_functions) \
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class CAPABILITY_CLASS_NAME(id) : public CAPABILITY_BASE_CLASS(id) { \
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public: \
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CAPABILITY_CLASS_NAME(id)(u32 v) : CAPABILITY_BASE_CLASS(id)(v) { /* ... */ } \
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\
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static CAPABILITY_CLASS_NAME(id) Decode(u32 v) { return CAPABILITY_CLASS_NAME(id)(v); } \
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\
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member_functions \
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}
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/* Class definitions. */
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DEFINE_CAPABILITY_CLASS(KernelFlags,
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u32 GetMaximumThreadPriority() const {
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return (this->GetValue() >> 0) & 0x3F;
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}
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u32 GetMinimumThreadPriority() const {
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return (this->GetValue() >> 6) & 0x3F;
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}
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u32 GetMinimumCoreId() const {
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return (this->GetValue() >> 12) & 0xFF;
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}
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u32 GetMaximumCoreId() const {
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return (this->GetValue() >> 20) & 0xFF;
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}
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bool IsValid(const u32 *kac, size_t kac_count) const {
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for (size_t i = 0; i < kac_count; i++) {
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if (GetCapabilityId(kac[i]) == this->GetId()) {
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const auto restrict = Decode(kac[i]);
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if (this->GetMinimumThreadPriority() < restrict.GetMinimumThreadPriority() ||
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this->GetMaximumThreadPriority() > restrict.GetMaximumThreadPriority() ||
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this->GetMinimumThreadPriority() > this->GetMaximumThreadPriority()) {
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return false;
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}
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if (this->GetMinimumCoreId() < restrict.GetMinimumCoreId() ||
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this->GetMaximumCoreId() > restrict.GetMaximumCoreId() ||
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this->GetMinimumCoreId() > this->GetMaximumCoreId()) {
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return false;
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}
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return true;
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}
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}
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return false;
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}
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);
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DEFINE_CAPABILITY_CLASS(SyscallMask,
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u32 GetMask() const {
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return (this->GetValue() >> 0) & 0xFFFFFF;
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}
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u32 GetIndex() const {
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return (this->GetValue() >> 24) & 0x7;
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}
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bool IsValid(const u32 *kac, size_t kac_count) const {
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for (size_t i = 0; i < kac_count; i++) {
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if (GetCapabilityId(kac[i]) == this->GetId()) {
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const auto restrict = Decode(kac[i]);
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if (this->GetIndex() == restrict.GetIndex() && this->GetMask() == restrict.GetMask()) {
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return true;
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}
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}
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}
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return false;
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}
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);
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DEFINE_CAPABILITY_CLASS(MapRange,
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static constexpr size_t SizeMax = 0x100000;
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u32 GetAddressSize() const {
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return (this->GetValue() >> 0) & 0xFFFFFF;
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}
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u32 GetFlag() const {
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return (this->GetValue() >> 24) & 0x1;
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}
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bool IsValid(const u32 next_cap, const u32 *kac, size_t kac_count) const {
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if (GetCapabilityId(next_cap) != this->GetId()) {
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return false;
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}
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const auto next = Decode(next_cap);
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const u32 start = this->GetAddressSize();
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const u32 size = next.GetAddressSize();
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const u32 end = start + size;
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if (size >= SizeMax) {
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return false;
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}
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for (size_t i = 0; i < kac_count; i++) {
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if (GetCapabilityId(kac[i]) == this->GetId()) {
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const auto restrict = Decode(kac[i]);
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i++;
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if (i >= kac_count || GetCapabilityId(kac[i]) != this->GetId()) {
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return false;
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}
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const auto restrict_next = Decode(kac[i]);
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const u32 restrict_start = restrict.GetAddressSize();
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const u32 restrict_size = restrict_next.GetAddressSize();
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const u32 restrict_end = restrict_start + restrict_size;
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if (restrict_size >= SizeMax) {
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continue;
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}
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if (this->GetFlag() == restrict.GetFlag() && next.GetFlag() == restrict_next.GetFlag()) {
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if (restrict_start <= start && start <= restrict_end && end <= restrict_end) {
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return true;
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}
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}
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}
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}
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return false;
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}
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);
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DEFINE_CAPABILITY_CLASS(MapPage,
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u32 GetAddress() const {
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return (this->GetValue() >> 0) & 0xFFFFFF;
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}
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bool IsValid(const u32 *kac, size_t kac_count) const {
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for (size_t i = 0; i < kac_count; i++) {
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if (GetCapabilityId(kac[i]) == this->GetId()) {
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const auto restrict = Decode(kac[i]);
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if (this->GetValue() == restrict.GetValue()) {
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return true;
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}
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}
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}
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return false;
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}
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);
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DEFINE_CAPABILITY_CLASS(InterruptPair,
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Result Validate(const u32 *kac, size_t kac_count) const;
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static constexpr u32 EmptyInterruptId = 0x3FF;
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u32 GetInterruptId0() const {
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return (this->GetValue() >> 0) & 0x3FF;
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}
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u32 GetInterruptId1() const {
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return (this->GetValue() >> 10) & 0x3FF;
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}
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bool IsSingleIdValid(const u32 id, const u32 *kac, size_t kac_count) const {
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for (size_t i = 0; i < kac_count; i++) {
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if (GetCapabilityId(kac[i]) == this->GetId()) {
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const auto restrict = Decode(kac[i]);
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if (restrict.GetInterruptId0() == EmptyInterruptId && restrict.GetInterruptId1() == EmptyInterruptId) {
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return true;
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}
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if (restrict.GetInterruptId0() == id || restrict.GetInterruptId1() == id) {
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return true;
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}
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}
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}
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return false;
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}
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bool IsValid(const u32 *kac, size_t kac_count) const {
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return IsSingleIdValid(this->GetInterruptId0(), kac, kac_count) && IsSingleIdValid(this->GetInterruptId1(), kac, kac_count);
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}
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);
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DEFINE_CAPABILITY_CLASS(ApplicationType,
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u32 GetApplicationType() const {
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return (this->GetValue() >> 0) & 0x3;
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}
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bool IsValid(const u32 *kac, size_t kac_count) const {
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for (size_t i = 0; i < kac_count; i++) {
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if (GetCapabilityId(kac[i]) == this->GetId()) {
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const auto restrict = Decode(kac[i]);
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return restrict.GetValue() == this->GetValue();
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}
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}
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return false;
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}
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static constexpr u32 Encode(u32 app_type) {
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return ((app_type & 3) << ValueShift) | IdMask;
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}
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);
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DEFINE_CAPABILITY_CLASS(KernelVersion,
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u32 GetMinorVersion() const {
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return (this->GetValue() >> 0) & 0xF;
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}
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u32 GetMajorVersion() const {
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/* TODO: Are upper bits unused? */
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return (this->GetValue() >> 4) & 0x1FFF;
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}
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bool IsValid(const u32 *kac, size_t kac_count) const {
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for (size_t i = 0; i < kac_count; i++) {
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if (GetCapabilityId(kac[i]) == this->GetId()) {
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const auto restrict = Decode(kac[i]);
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return restrict.GetValue() == this->GetValue();
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}
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}
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return false;
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}
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);
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DEFINE_CAPABILITY_CLASS(HandleTable,
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u32 GetSize() const {
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return (this->GetValue() >> 0) & 0x3FF;
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}
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bool IsValid(const u32 *kac, size_t kac_count) const {
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for (size_t i = 0; i < kac_count; i++) {
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if (GetCapabilityId(kac[i]) == this->GetId()) {
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const auto restrict = Decode(kac[i]);
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return this->GetSize() <= restrict.GetSize();
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}
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}
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return false;
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}
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);
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DEFINE_CAPABILITY_CLASS(DebugFlags,
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bool GetAllowDebug() const {
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return ((this->GetValue() >> 0) & 1) != 0;
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}
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bool GetForceDebug() const {
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return ((this->GetValue() >> 1) & 1) != 0;
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}
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bool IsValid(const u32 *kac, size_t kac_count) const {
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for (size_t i = 0; i < kac_count; i++) {
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if (GetCapabilityId(kac[i]) == this->GetId()) {
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const auto restrict = Decode(kac[i]);
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return (restrict.GetValue() & this->GetValue()) == this->GetValue();
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}
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}
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return false;
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}
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static constexpr u32 Encode(bool allow_debug, bool force_debug) {
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const u32 desc = (static_cast<u32>(force_debug) << 1) | (static_cast<u32>(allow_debug) << 0);
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return (desc << ValueShift) | IdMask;
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}
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);
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}
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/* Capabilities API. */
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Result ValidateCapabilities(const void *acid_kac, size_t acid_kac_size, const void *aci_kac, size_t aci_kac_size) {
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const u32 *acid_caps = reinterpret_cast<const u32 *>(acid_kac);
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const u32 *aci_caps = reinterpret_cast<const u32 *>(aci_kac);
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const size_t num_acid_caps = acid_kac_size / sizeof(*acid_caps);
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const size_t num_aci_caps = aci_kac_size / sizeof(*aci_caps);
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for (size_t i = 0; i < num_aci_caps; i++) {
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const u32 cur_cap = aci_caps[i];
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const auto id = GetCapabilityId(cur_cap);
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#define VALIDATE_CASE(id) \
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case CapabilityId::id: \
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if (!Capability##id::Decode(cur_cap).IsValid(acid_caps, num_acid_caps)) { \
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return ResultLoaderInvalidCapability##id; \
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} \
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break
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switch (id) {
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VALIDATE_CASE(KernelFlags);
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VALIDATE_CASE(SyscallMask);
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VALIDATE_CASE(MapPage);
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VALIDATE_CASE(InterruptPair);
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VALIDATE_CASE(ApplicationType);
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VALIDATE_CASE(KernelVersion);
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VALIDATE_CASE(HandleTable);
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VALIDATE_CASE(DebugFlags);
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case CapabilityId::MapRange:
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{
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/* Map Range needs extra logic because there it involves two sequential caps. */
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i++;
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if (i >= num_aci_caps || !CapabilityMapRange::Decode(cur_cap).IsValid(aci_caps[i], acid_caps, num_acid_caps)) {
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return ResultLoaderInvalidCapabilityMapRange;
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}
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}
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break;
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default:
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if (id != CapabilityId::Empty) {
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return ResultLoaderUnknownCapability;
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}
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break;
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}
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#undef VALIDATE_CASE
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}
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return ResultSuccess;
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}
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u16 GetProgramInfoFlags(const void *kac, size_t kac_size) {
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const u32 *caps = reinterpret_cast<const u32 *>(kac);
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const size_t num_caps = kac_size / sizeof(*caps);
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u16 flags = 0;
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for (size_t i = 0; i < num_caps; i++) {
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const u32 cur_cap = caps[i];
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switch (GetCapabilityId(cur_cap)) {
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case CapabilityId::ApplicationType:
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{
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const auto app_type = CapabilityApplicationType::Decode(cur_cap).GetApplicationType() & ProgramInfoFlag_ApplicationTypeMask;
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if (app_type != ProgramInfoFlag_InvalidType) {
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flags |= app_type;
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}
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}
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break;
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case CapabilityId::DebugFlags:
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if (CapabilityDebugFlags::Decode(cur_cap).GetAllowDebug()) {
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flags |= ProgramInfoFlag_AllowDebug;
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}
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break;
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default:
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break;
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}
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}
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return flags;
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}
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void SetProgramInfoFlags(u16 flags, void *kac, size_t kac_size) {
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u32 *caps = reinterpret_cast<u32 *>(kac);
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const size_t num_caps = kac_size / sizeof(*caps);
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for (size_t i = 0; i < num_caps; i++) {
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const u32 cur_cap = caps[i];
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switch (GetCapabilityId(cur_cap)) {
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case CapabilityId::ApplicationType:
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caps[i] = CapabilityApplicationType::Encode(flags & ProgramInfoFlag_ApplicationTypeMask);
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break;
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case CapabilityId::DebugFlags:
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caps[i] = CapabilityDebugFlags::Encode((flags & ProgramInfoFlag_AllowDebug) != 0, CapabilityDebugFlags::Decode(cur_cap).GetForceDebug());
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break;
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default:
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break;
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}
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}
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}
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}
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