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kern: update Initialize0 for new arguments/randomization semantics

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This commit is contained in:
Michael Scire 2021-09-18 09:58:02 -07:00
parent 1cf3b24c2d
commit a33576e674
13 changed files with 160 additions and 115 deletions
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6
libraries/libmesosphere/include/mesosphere/arch/arm64/init/kern_k_init_page_table.hpp
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@ -293,7 +293,7 @@ namespace ams::kern::arch::arm64::init {
} }
/* Swap the mappings. */ /* Swap the mappings. */
const u64 attr_preserve_mask = (negative_block_size_for_mask | 0xFFFF000000000000ul) ^ ((1ul << 48) - 1); const u64 attr_preserve_mask = (block_size - 1) | 0xFFFF000000000000ul;
const size_t shift_for_contig = contig ? 4 : 0; const size_t shift_for_contig = contig ? 4 : 0;
size_t advanced_size = 0; size_t advanced_size = 0;
const u64 src_attr_val = src_saved.GetRawAttributesUnsafeForSwap() & attr_preserve_mask; const u64 src_attr_val = src_saved.GetRawAttributesUnsafeForSwap() & attr_preserve_mask;
@ -726,8 +726,8 @@ namespace ams::kern::arch::arm64::init {
m_state.end_address = address; m_state.end_address = address;
} }
ALWAYS_INLINE void InitializeFromState(uintptr_t state_val) { ALWAYS_INLINE void InitializeFromState(const State *state) {
m_state = *reinterpret_cast<State *>(state_val); m_state = *state;
} }
ALWAYS_INLINE void GetFinalState(State *out) { ALWAYS_INLINE void GetFinalState(State *out) {

8
libraries/libmesosphere/include/mesosphere/board/nintendo/nx/kern_k_system_control.hpp
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@ -16,6 +16,12 @@
#pragma once #pragma once
#include <mesosphere/kern_common.hpp> #include <mesosphere/kern_common.hpp>
namespace ams::kern {
struct InitialProcessBinaryLayout;
}
namespace ams::kern::board::nintendo::nx { namespace ams::kern::board::nintendo::nx {
class KSystemControl { class KSystemControl {
@ -25,7 +31,7 @@ namespace ams::kern::board::nintendo::nx {
/* Initialization. */ /* Initialization. */
static size_t GetIntendedMemorySize(); static size_t GetIntendedMemorySize();
static KPhysicalAddress GetKernelPhysicalBaseAddress(uintptr_t base_address); static KPhysicalAddress GetKernelPhysicalBaseAddress(uintptr_t base_address);
static KPhysicalAddress GetInitialProcessBinaryPhysicalAddress(); static void GetInitialProcessBinaryLayout(InitialProcessBinaryLayout *out);
static bool ShouldIncreaseThreadResourceLimit(); static bool ShouldIncreaseThreadResourceLimit();
static void CpuOn(u64 core_id, uintptr_t entrypoint, uintptr_t arg); static void CpuOn(u64 core_id, uintptr_t entrypoint, uintptr_t arg);
static size_t GetApplicationPoolSize(); static size_t GetApplicationPoolSize();

13
libraries/libmesosphere/include/mesosphere/kern_initial_process.hpp
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@ -29,14 +29,19 @@ namespace ams::kern {
u32 reserved; u32 reserved;
}; };
NOINLINE size_t CopyInitialProcessBinaryToKernelMemory(); struct InitialProcessBinaryLayout {
NOINLINE void CreateAndRunInitialProcesses(); uintptr_t address;
uintptr_t _08;
};
KPhysicalAddress GetInitialProcessBinaryPhysicalAddress();
void SetInitialProcessBinaryPhysicalAddress(KPhysicalAddress phys_addr);
u64 GetInitialProcessIdMin(); u64 GetInitialProcessIdMin();
u64 GetInitialProcessIdMax(); u64 GetInitialProcessIdMax();
KVirtualAddress GetInitialProcessBinaryAddress();
size_t GetInitialProcessesSecureMemorySize(); size_t GetInitialProcessesSecureMemorySize();
void LoadInitialProcessBinaryHeaderDeprecated(KPhysicalAddress pool_end); NOINLINE size_t CopyInitialProcessBinaryToKernelMemory();
NOINLINE void CreateAndRunInitialProcesses();
} }

6
libraries/libmesosphere/include/mesosphere/kern_k_memory_region.hpp
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@ -237,12 +237,6 @@ namespace ams::kern {
public: public:
NOINLINE void InsertDirectly(uintptr_t address, uintptr_t last_address, u32 attr = 0, u32 type_id = 0); NOINLINE void InsertDirectly(uintptr_t address, uintptr_t last_address, u32 attr = 0, u32 type_id = 0);
NOINLINE bool Insert(uintptr_t address, size_t size, u32 type_id, u32 new_attr = 0, u32 old_attr = 0); NOINLINE bool Insert(uintptr_t address, size_t size, u32 type_id, u32 new_attr = 0, u32 old_attr = 0);
NOINLINE KVirtualAddress GetRandomAlignedRegion(size_t size, size_t alignment, u32 type_id);
ALWAYS_INLINE KVirtualAddress GetRandomAlignedRegionWithGuard(size_t size, size_t alignment, u32 type_id, size_t guard_size) {
return this->GetRandomAlignedRegion(size + 2 * guard_size, alignment, type_id) + guard_size;
}
public: public:
/* Iterator accessors. */ /* Iterator accessors. */
iterator begin() { iterator begin() {

7
libraries/libmesosphere/source/board/nintendo/nx/kern_k_system_control.cpp
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@ -346,8 +346,11 @@ namespace ams::kern::board::nintendo::nx {
} }
} }
KPhysicalAddress KSystemControl::Init::GetInitialProcessBinaryPhysicalAddress() { void KSystemControl::Init::GetInitialProcessBinaryLayout(InitialProcessBinaryLayout *out) {
return GetKernelPhysicalBaseAddress(DramPhysicalAddress) + GetIntendedMemorySize() - KTraceBufferSize - InitialProcessBinarySizeMax; *out = {
.address = GetInteger(GetKernelPhysicalBaseAddress(DramPhysicalAddress)) + GetIntendedMemorySize() - KTraceBufferSize - InitialProcessBinarySizeMax,
._08 = 0,
};
} }
bool KSystemControl::Init::ShouldIncreaseThreadResourceLimit() { bool KSystemControl::Init::ShouldIncreaseThreadResourceLimit() {

37
libraries/libmesosphere/source/kern_initial_process.cpp
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@ -25,18 +25,18 @@ namespace ams::kern {
s32 priority; s32 priority;
}; };
constinit KPhysicalAddress g_initial_process_binary_phys_addr = Null<KPhysicalAddress>;
constinit KVirtualAddress g_initial_process_binary_address = Null<KVirtualAddress>; constinit KVirtualAddress g_initial_process_binary_address = Null<KVirtualAddress>;
constinit InitialProcessBinaryHeader g_initial_process_binary_header = {}; constinit InitialProcessBinaryHeader g_initial_process_binary_header = {};
constinit size_t g_initial_process_secure_memory_size = 0; constinit size_t g_initial_process_secure_memory_size = 0;
constinit u64 g_initial_process_id_min = std::numeric_limits<u64>::max(); constinit u64 g_initial_process_id_min = std::numeric_limits<u64>::max();
constinit u64 g_initial_process_id_max = std::numeric_limits<u64>::min(); constinit u64 g_initial_process_id_max = std::numeric_limits<u64>::min();
void LoadInitialProcessBinaryHeader(KVirtualAddress virt_addr = Null<KVirtualAddress>) { void LoadInitialProcessBinaryHeader() {
if (g_initial_process_binary_header.magic != InitialProcessBinaryMagic) { if (g_initial_process_binary_header.magic != InitialProcessBinaryMagic) {
/* Get the virtual address, if it's not overridden. */ /* Get the virtual address. */
if (virt_addr == Null<KVirtualAddress>) { MESOSPHERE_INIT_ABORT_UNLESS(g_initial_process_binary_phys_addr != Null<KPhysicalAddress>);
virt_addr = GetInitialProcessBinaryAddress(); const KVirtualAddress virt_addr = KMemoryLayout::GetLinearVirtualAddress(g_initial_process_binary_phys_addr);
}
/* Copy and validate the header. */ /* Copy and validate the header. */
g_initial_process_binary_header = *GetPointer<InitialProcessBinaryHeader>(virt_addr); g_initial_process_binary_header = *GetPointer<InitialProcessBinaryHeader>(virt_addr);
@ -273,10 +273,18 @@ namespace ams::kern {
} }
} }
ALWAYS_INLINE KVirtualAddress GetInitialProcessBinaryAddress(KVirtualAddress pool_end) { }
return pool_end - InitialProcessBinarySizeMax;
}
void SetInitialProcessBinaryPhysicalAddress(KPhysicalAddress phys_addr) {
MESOSPHERE_INIT_ABORT_UNLESS(g_initial_process_binary_phys_addr == Null<KPhysicalAddress>);
g_initial_process_binary_phys_addr = phys_addr;
}
KPhysicalAddress GetInitialProcessBinaryPhysicalAddress() {
MESOSPHERE_INIT_ABORT_UNLESS(g_initial_process_binary_phys_addr != Null<KPhysicalAddress>);
return g_initial_process_binary_phys_addr;
} }
u64 GetInitialProcessIdMin() { u64 GetInitialProcessIdMin() {
@ -287,15 +295,6 @@ namespace ams::kern {
return g_initial_process_id_max; return g_initial_process_id_max;
} }
KVirtualAddress GetInitialProcessBinaryAddress() {
/* Get, validate the pool region. */
const auto *pool_region = KMemoryLayout::GetVirtualMemoryRegionTree().FindLastDerived(KMemoryRegionType_VirtualDramUserPool);
MESOSPHERE_INIT_ABORT_UNLESS(pool_region != nullptr);
MESOSPHERE_INIT_ABORT_UNLESS(pool_region->GetEndAddress() != 0);
MESOSPHERE_ABORT_UNLESS(pool_region->GetSize() >= InitialProcessBinarySizeMax);
return GetInitialProcessBinaryAddress(pool_region->GetEndAddress());
}
size_t GetInitialProcessesSecureMemorySize() { size_t GetInitialProcessesSecureMemorySize() {
LoadInitialProcessBinaryHeader(); LoadInitialProcessBinaryHeader();
@ -321,10 +320,6 @@ namespace ams::kern {
} }
} }
void LoadInitialProcessBinaryHeaderDeprecated(KPhysicalAddress pool_end) {
LoadInitialProcessBinaryHeader(GetInitialProcessBinaryAddress(KMemoryLayout::GetLinearVirtualAddress(pool_end)));
}
void CreateAndRunInitialProcesses() { void CreateAndRunInitialProcesses() {
/* Allocate space for the processes. */ /* Allocate space for the processes. */
InitialProcessInfo *infos = static_cast<InitialProcessInfo *>(__builtin_alloca(sizeof(InitialProcessInfo) * g_initial_process_binary_header.num_processes)); InitialProcessInfo *infos = static_cast<InitialProcessInfo *>(__builtin_alloca(sizeof(InitialProcessInfo) * g_initial_process_binary_header.num_processes));

6
libraries/libmesosphere/source/kern_k_memory_layout.board.nintendo_nx.cpp
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@ -190,12 +190,6 @@ namespace ams::kern {
static_assert(KMemoryManager::Pool_Unsafe == KMemoryManager::Pool_Application); static_assert(KMemoryManager::Pool_Unsafe == KMemoryManager::Pool_Application);
static_assert(KMemoryManager::Pool_Secure == KMemoryManager::Pool_System); static_assert(KMemoryManager::Pool_Secure == KMemoryManager::Pool_System);
/* NOTE: Beginning with 12.0.0 (and always, in mesosphere), the initial process binary is at the end of the pool region. */
/* However, this is problematic for < 5.0.0, because we require the initial process binary to be parsed in order */
/* to determine the pool sizes. Hence, we will force an initial binary load with the known pool end directly, so */
/* that we retain compatibility with lower firmware versions. */
LoadInitialProcessBinaryHeaderDeprecated(pool_end);
/* Get Secure pool size. */ /* Get Secure pool size. */
const size_t secure_pool_size = [] ALWAYS_INLINE_LAMBDA (auto target_firmware) -> size_t { const size_t secure_pool_size = [] ALWAYS_INLINE_LAMBDA (auto target_firmware) -> size_t {
constexpr size_t LegacySecureKernelSize = 8_MB; /* KPageBuffer pages, other small kernel allocations. */ constexpr size_t LegacySecureKernelSize = 8_MB; /* KPageBuffer pages, other small kernel allocations. */

37
libraries/libmesosphere/source/kern_k_memory_layout.cpp
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@ -111,43 +111,6 @@ namespace ams::kern {
return true; return true;
} }
KVirtualAddress KMemoryRegionTree::GetRandomAlignedRegion(size_t size, size_t alignment, u32 type_id) {
/* We want to find the total extents of the type id. */
const auto extents = this->GetDerivedRegionExtents(type_id);
/* Ensure that our alignment is correct. */
MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(extents.GetAddress(), alignment));
const uintptr_t first_address = extents.GetAddress();
const uintptr_t last_address = extents.GetLastAddress();
const uintptr_t first_index = first_address / alignment;
const uintptr_t last_index = last_address / alignment;
while (true) {
const uintptr_t candidate = KSystemControl::Init::GenerateRandomRange(first_index, last_index) * alignment;
/* Ensure that the candidate doesn't overflow with the size. */
if (!(candidate < candidate + size)) {
continue;
}
const uintptr_t candidate_last = candidate + size - 1;
/* Ensure that the candidate fits within the region. */
if (candidate_last > last_address) {
continue;
}
/* Locate the candidate region, and ensure it fits and has the correct type id. */
if (const auto &candidate_region = *this->Find(candidate); !(candidate_last <= candidate_region.GetLastAddress() && candidate_region.GetType() == type_id)) {
continue;
}
return candidate;
}
}
void KMemoryLayout::InitializeLinearMemoryRegionTrees() { void KMemoryLayout::InitializeLinearMemoryRegionTrees() {
/* Initialize linear trees. */ /* Initialize linear trees. */
for (auto &region : GetPhysicalMemoryRegionTree()) { for (auto &region : GetPhysicalMemoryRegionTree()) {

2
libraries/libmesosphere/source/kern_k_memory_manager.cpp
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@ -107,7 +107,7 @@ namespace ams::kern {
/* Free each region to its corresponding heap. */ /* Free each region to its corresponding heap. */
size_t reserved_sizes[MaxManagerCount] = {}; size_t reserved_sizes[MaxManagerCount] = {};
const KPhysicalAddress ini_start = KMemoryLayout::GetLinearPhysicalAddress(GetInitialProcessBinaryAddress()); const KPhysicalAddress ini_start = GetInitialProcessBinaryPhysicalAddress();
const KPhysicalAddress ini_end = ini_start + InitialProcessBinarySizeMax; const KPhysicalAddress ini_end = ini_start + InitialProcessBinarySizeMax;
const KPhysicalAddress ini_last = ini_end - 1; const KPhysicalAddress ini_last = ini_end - 1;
for (const auto &it : KMemoryLayout::GetPhysicalMemoryRegionTree()) { for (const auto &it : KMemoryLayout::GetPhysicalMemoryRegionTree()) {

112
mesosphere/kernel/source/arch/arm64/init/kern_init_core.cpp
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@ -48,16 +48,6 @@ namespace ams::kern::init {
constexpr PageTableEntry KernelRwDataUncachedAttribute(PageTableEntry::Permission_KernelRW, PageTableEntry::PageAttribute_NormalMemoryNotCacheable, PageTableEntry::Shareable_InnerShareable, PageTableEntry::MappingFlag_Mapped); constexpr PageTableEntry KernelRwDataUncachedAttribute(PageTableEntry::Permission_KernelRW, PageTableEntry::PageAttribute_NormalMemoryNotCacheable, PageTableEntry::Shareable_InnerShareable, PageTableEntry::MappingFlag_Mapped);
void MapStackForCore(KInitialPageTable &page_table, KMemoryRegionType type, u32 core_id) {
constexpr size_t StackSize = PageSize;
constexpr size_t StackAlign = PageSize;
const KVirtualAddress stack_start_virt = KMemoryLayout::GetVirtualMemoryRegionTree().GetRandomAlignedRegionWithGuard(StackSize, StackAlign, KMemoryRegionType_KernelMisc, PageSize);
const KPhysicalAddress stack_start_phys = g_initial_page_allocator.Allocate(PageSize);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(stack_start_virt), StackSize, type, core_id));
page_table.Map(stack_start_virt, StackSize, stack_start_phys, KernelRwDataAttribute, g_initial_page_allocator);
}
void StoreDataCache(const void *addr, size_t size) { void StoreDataCache(const void *addr, size_t size) {
uintptr_t start = util::AlignDown(reinterpret_cast<uintptr_t>(addr), cpu::DataCacheLineSize); uintptr_t start = util::AlignDown(reinterpret_cast<uintptr_t>(addr), cpu::DataCacheLineSize);
uintptr_t end = reinterpret_cast<uintptr_t>(addr) + size; uintptr_t end = reinterpret_cast<uintptr_t>(addr) + size;
@ -121,14 +111,78 @@ namespace ams::kern::init {
StoreDataCache(g_init_arguments, sizeof(g_init_arguments)); StoreDataCache(g_init_arguments, sizeof(g_init_arguments));
} }
KVirtualAddress GetRandomAlignedRegionWithGuard(size_t size, size_t alignment, KInitialPageTable &pt, KMemoryRegionTree &tree, u32 type_id, size_t guard_size) {
/* Check that the size is valid. */
MESOSPHERE_INIT_ABORT_UNLESS(size > 0);
/* We want to find the total extents of the type id. */
const auto extents = tree.GetDerivedRegionExtents(type_id);
/* Ensure that our alignment is correct. */
MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(extents.GetAddress(), alignment));
const uintptr_t first_address = extents.GetAddress();
const uintptr_t last_address = extents.GetLastAddress();
const uintptr_t first_index = first_address / alignment;
const uintptr_t last_index = last_address / alignment;
while (true) {
const uintptr_t candidate_start = KSystemControl::Init::GenerateRandomRange(first_index, last_index) * alignment;
const uintptr_t candidate_end = candidate_start + size + guard_size;
/* Ensure that the candidate doesn't overflow with the size/guard. */
if (!(candidate_start < candidate_end) || !(candidate_start >= guard_size)) {
continue;
}
const uintptr_t candidate_last = candidate_end - 1;
/* Ensure that the candidate fits within the region. */
if (candidate_last > last_address) {
continue;
}
/* Ensure that the candidate range is free. */
if (!pt.IsFree(candidate_start, size)) {
continue;
}
/* Locate the candidate's guard start, and ensure the whole range fits/has the correct type id. */
if (const auto &candidate_region = *tree.Find(candidate_start - guard_size); !(candidate_last <= candidate_region.GetLastAddress() && candidate_region.GetType() == type_id)) {
continue;
}
return candidate_start;
}
}
KVirtualAddress GetRandomAlignedRegion(size_t size, size_t alignment, KInitialPageTable &pt, KMemoryRegionTree &tree, u32 type_id) {
return GetRandomAlignedRegionWithGuard(size, alignment, pt, tree, type_id, 0);
}
void MapStackForCore(KInitialPageTable &page_table, KMemoryRegionType type, u32 core_id) {
constexpr size_t StackSize = PageSize;
constexpr size_t StackAlign = PageSize;
const KVirtualAddress stack_start_virt = GetRandomAlignedRegionWithGuard(StackSize, StackAlign, page_table, KMemoryLayout::GetVirtualMemoryRegionTree(), KMemoryRegionType_KernelMisc, PageSize);
const KPhysicalAddress stack_start_phys = g_initial_page_allocator.Allocate(PageSize);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(stack_start_virt), StackSize, type, core_id));
page_table.Map(stack_start_virt, StackSize, stack_start_phys, KernelRwDataAttribute, g_initial_page_allocator);
}
} }
void InitializeCore(uintptr_t misc_unk_debug_phys_addr, uintptr_t initial_page_allocator_state) { void InitializeCore(uintptr_t misc_unk_debug_phys_addr, void **initial_state) {
/* Ensure our first argument is page aligned. */ /* Ensure our first argument is page aligned. */
MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(misc_unk_debug_phys_addr, PageSize)); MESOSPHERE_INIT_ABORT_UNLESS(util::IsAligned(misc_unk_debug_phys_addr, PageSize));
/* Decode the initial state. */
const auto initial_page_allocator_state = *static_cast<KInitialPageAllocator::State *>(initial_state[0]);
const auto initial_process_binary_layout = *static_cast<InitialProcessBinaryLayout *>(initial_state[1]);
/* Restore the page allocator state setup by kernel loader. */ /* Restore the page allocator state setup by kernel loader. */
g_initial_page_allocator.InitializeFromState(initial_page_allocator_state); g_initial_page_allocator.InitializeFromState(std::addressof(initial_page_allocator_state));
/* Ensure that the T1SZ is correct (and what we expect). */ /* Ensure that the T1SZ is correct (and what we expect). */
MESOSPHERE_INIT_ABORT_UNLESS((cpu::TranslationControlRegisterAccessor().GetT1Size() / arch::arm64::L1BlockSize) == arch::arm64::MaxPageTableEntries); MESOSPHERE_INIT_ABORT_UNLESS((cpu::TranslationControlRegisterAccessor().GetT1Size() / arch::arm64::L1BlockSize) == arch::arm64::MaxPageTableEntries);
@ -207,13 +261,13 @@ namespace ams::kern::init {
MESOSPHERE_INIT_ABORT_UNLESS(misc_region_size > 0); MESOSPHERE_INIT_ABORT_UNLESS(misc_region_size > 0);
/* Setup the misc region. */ /* Setup the misc region. */
const KVirtualAddress misc_region_start = KMemoryLayout::GetVirtualMemoryRegionTree().GetRandomAlignedRegion(misc_region_size, MiscRegionAlign, KMemoryRegionType_Kernel); const KVirtualAddress misc_region_start = GetRandomAlignedRegion(misc_region_size, MiscRegionAlign, init_pt, KMemoryLayout::GetVirtualMemoryRegionTree(), KMemoryRegionType_Kernel);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(misc_region_start), misc_region_size, KMemoryRegionType_KernelMisc)); MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(misc_region_start), misc_region_size, KMemoryRegionType_KernelMisc));
/* Setup the stack region. */ /* Setup the stack region. */
constexpr size_t StackRegionSize = 14_MB; constexpr size_t StackRegionSize = 14_MB;
constexpr size_t StackRegionAlign = KernelAslrAlignment; constexpr size_t StackRegionAlign = KernelAslrAlignment;
const KVirtualAddress stack_region_start = KMemoryLayout::GetVirtualMemoryRegionTree().GetRandomAlignedRegion(StackRegionSize, StackRegionAlign, KMemoryRegionType_Kernel); const KVirtualAddress stack_region_start = GetRandomAlignedRegion(StackRegionSize, StackRegionAlign, init_pt, KMemoryLayout::GetVirtualMemoryRegionTree(), KMemoryRegionType_Kernel);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(stack_region_start), StackRegionSize, KMemoryRegionType_KernelStack)); MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(stack_region_start), StackRegionSize, KMemoryRegionType_KernelStack));
/* Determine the size of the resource region. */ /* Determine the size of the resource region. */
@ -230,13 +284,13 @@ namespace ams::kern::init {
const KPhysicalAddress slab_end_phys_addr = slab_start_phys_addr + slab_region_size; const KPhysicalAddress slab_end_phys_addr = slab_start_phys_addr + slab_region_size;
constexpr size_t SlabRegionAlign = KernelAslrAlignment; constexpr size_t SlabRegionAlign = KernelAslrAlignment;
const size_t slab_region_needed_size = util::AlignUp(GetInteger(code_end_phys_addr) + slab_region_size, SlabRegionAlign) - util::AlignDown(GetInteger(code_end_phys_addr), SlabRegionAlign); const size_t slab_region_needed_size = util::AlignUp(GetInteger(code_end_phys_addr) + slab_region_size, SlabRegionAlign) - util::AlignDown(GetInteger(code_end_phys_addr), SlabRegionAlign);
const KVirtualAddress slab_region_start = KMemoryLayout::GetVirtualMemoryRegionTree().GetRandomAlignedRegion(slab_region_needed_size, SlabRegionAlign, KMemoryRegionType_Kernel) + (GetInteger(code_end_phys_addr) % SlabRegionAlign); const KVirtualAddress slab_region_start = GetRandomAlignedRegion(slab_region_needed_size, SlabRegionAlign, init_pt, KMemoryLayout::GetVirtualMemoryRegionTree(), KMemoryRegionType_Kernel) + (GetInteger(code_end_phys_addr) % SlabRegionAlign);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(slab_region_start), slab_region_size, KMemoryRegionType_KernelSlab)); MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(slab_region_start), slab_region_size, KMemoryRegionType_KernelSlab));
/* Setup the temp region. */ /* Setup the temp region. */
constexpr size_t TempRegionSize = 128_MB; constexpr size_t TempRegionSize = 128_MB;
constexpr size_t TempRegionAlign = KernelAslrAlignment; constexpr size_t TempRegionAlign = KernelAslrAlignment;
const KVirtualAddress temp_region_start = KMemoryLayout::GetVirtualMemoryRegionTree().GetRandomAlignedRegion(TempRegionSize, TempRegionAlign, KMemoryRegionType_Kernel); const KVirtualAddress temp_region_start = GetRandomAlignedRegion(TempRegionSize, TempRegionAlign, init_pt, KMemoryLayout::GetVirtualMemoryRegionTree(), KMemoryRegionType_Kernel);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(temp_region_start), TempRegionSize, KMemoryRegionType_KernelTemp)); MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(temp_region_start), TempRegionSize, KMemoryRegionType_KernelTemp));
/* Automatically map in devices that have auto-map attributes, from largest region to smallest region. */ /* Automatically map in devices that have auto-map attributes, from largest region to smallest region. */
@ -282,7 +336,7 @@ namespace ams::kern::init {
const size_t map_size = util::AlignUp(largest->GetEndAddress(), PageSize) - GetInteger(map_phys_addr); const size_t map_size = util::AlignUp(largest->GetEndAddress(), PageSize) - GetInteger(map_phys_addr);
const size_t min_align = std::min<size_t>(util::GetAlignment(map_size), util::GetAlignment(GetInteger(map_phys_addr))); const size_t min_align = std::min<size_t>(util::GetAlignment(map_size), util::GetAlignment(GetInteger(map_phys_addr)));
const size_t map_align = min_align >= KernelAslrAlignment ? KernelAslrAlignment : PageSize; const size_t map_align = min_align >= KernelAslrAlignment ? KernelAslrAlignment : PageSize;
const KVirtualAddress map_virt_addr = KMemoryLayout::GetVirtualMemoryRegionTree().GetRandomAlignedRegionWithGuard(map_size, map_align, KMemoryRegionType_KernelMisc, map_align); const KVirtualAddress map_virt_addr = GetRandomAlignedRegionWithGuard(map_size, map_align, init_pt, KMemoryLayout::GetVirtualMemoryRegionTree(), KMemoryRegionType_KernelMisc, PageSize);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(map_virt_addr), map_size, KMemoryRegionType_KernelMiscMappedDevice)); MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(map_virt_addr), map_size, KMemoryRegionType_KernelMiscMappedDevice));
largest->SetPairAddress(GetInteger(map_virt_addr) + largest->GetAddress() - GetInteger(map_phys_addr)); largest->SetPairAddress(GetInteger(map_virt_addr) + largest->GetAddress() - GetInteger(map_phys_addr));
@ -338,7 +392,7 @@ namespace ams::kern::init {
const size_t map_size = util::AlignUp(largest->GetEndAddress(), PageSize) - GetInteger(map_phys_addr); const size_t map_size = util::AlignUp(largest->GetEndAddress(), PageSize) - GetInteger(map_phys_addr);
const size_t min_align = std::min<size_t>(util::GetAlignment(map_size), util::GetAlignment(GetInteger(map_phys_addr))); const size_t min_align = std::min<size_t>(util::GetAlignment(map_size), util::GetAlignment(GetInteger(map_phys_addr)));
const size_t map_align = min_align >= KernelAslrAlignment ? KernelAslrAlignment : PageSize; const size_t map_align = min_align >= KernelAslrAlignment ? KernelAslrAlignment : PageSize;
const KVirtualAddress map_virt_addr = KMemoryLayout::GetVirtualMemoryRegionTree().GetRandomAlignedRegionWithGuard(map_size, map_align, KMemoryRegionType_KernelMisc, map_align); const KVirtualAddress map_virt_addr = GetRandomAlignedRegionWithGuard(map_size, map_align, init_pt, KMemoryLayout::GetVirtualMemoryRegionTree(), KMemoryRegionType_KernelMisc, PageSize);
MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(map_virt_addr), map_size, KMemoryRegionType_KernelMiscUnknownDebug)); MESOSPHERE_INIT_ABORT_UNLESS(KMemoryLayout::GetVirtualMemoryRegionTree().Insert(GetInteger(map_virt_addr), map_size, KMemoryRegionType_KernelMiscUnknownDebug));
largest->SetPairAddress(GetInteger(map_virt_addr) + largest->GetAddress() - GetInteger(map_phys_addr)); largest->SetPairAddress(GetInteger(map_virt_addr) + largest->GetAddress() - GetInteger(map_phys_addr));
@ -388,7 +442,7 @@ namespace ams::kern::init {
constexpr size_t LinearRegionAlign = 1_GB; constexpr size_t LinearRegionAlign = 1_GB;
const KPhysicalAddress aligned_linear_phys_start = util::AlignDown(linear_extents.GetAddress(), LinearRegionAlign); const KPhysicalAddress aligned_linear_phys_start = util::AlignDown(linear_extents.GetAddress(), LinearRegionAlign);
const size_t linear_region_size = util::AlignUp(linear_extents.GetEndAddress(), LinearRegionAlign) - GetInteger(aligned_linear_phys_start); const size_t linear_region_size = util::AlignUp(linear_extents.GetEndAddress(), LinearRegionAlign) - GetInteger(aligned_linear_phys_start);
const KVirtualAddress linear_region_start = KMemoryLayout::GetVirtualMemoryRegionTree().GetRandomAlignedRegionWithGuard(linear_region_size, LinearRegionAlign, KMemoryRegionType_None, LinearRegionAlign); const KVirtualAddress linear_region_start = GetRandomAlignedRegionWithGuard(linear_region_size, LinearRegionAlign, init_pt, KMemoryLayout::GetVirtualMemoryRegionTree(), KMemoryRegionType_None, LinearRegionAlign);
const uintptr_t linear_region_phys_to_virt_diff = GetInteger(linear_region_start) - GetInteger(aligned_linear_phys_start); const uintptr_t linear_region_phys_to_virt_diff = GetInteger(linear_region_start) - GetInteger(aligned_linear_phys_start);
@ -471,9 +525,29 @@ namespace ams::kern::init {
/* Set the linear memory offsets, to enable conversion between physical and virtual addresses. */ /* Set the linear memory offsets, to enable conversion between physical and virtual addresses. */
KMemoryLayout::InitializeLinearMemoryAddresses(aligned_linear_phys_start, linear_region_start); KMemoryLayout::InitializeLinearMemoryAddresses(aligned_linear_phys_start, linear_region_start);
/* Set the initial process binary physical address. */
/* NOTE: Nintendo does this after pool partition setup, but it's a requirement that we do it before */
/* to retain compatibility with < 5.0.0. */
const KPhysicalAddress ini_address = initial_process_binary_layout.address;
MESOSPHERE_INIT_ABORT_UNLESS(ini_address != Null<KPhysicalAddress>);
SetInitialProcessBinaryPhysicalAddress(ini_address);
/* Setup all other memory regions needed to arrange the pool partitions. */ /* Setup all other memory regions needed to arrange the pool partitions. */
SetupPoolPartitionMemoryRegions(); SetupPoolPartitionMemoryRegions();
/* Validate the initial process binary address. */
{
const KMemoryRegion *ini_region = KMemoryLayout::Find(ini_address);
/* Check that the region is non-kernel dram. */
MESOSPHERE_INIT_ABORT_UNLESS(ini_region->IsDerivedFrom(KMemoryRegionType_DramUserPool));
/* Check that the region contains the ini. */
MESOSPHERE_INIT_ABORT_UNLESS(ini_region->GetAddress() <= GetInteger(ini_address));
MESOSPHERE_INIT_ABORT_UNLESS(GetInteger(ini_address) + InitialProcessBinarySizeMax <= ini_region->GetEndAddress());
MESOSPHERE_INIT_ABORT_UNLESS(ini_region->GetEndAddress() != 0);
}
/* Cache all linear regions in their own trees for faster access, later. */ /* Cache all linear regions in their own trees for faster access, later. */
KMemoryLayout::InitializeLinearMemoryRegionTrees(); KMemoryLayout::InitializeLinearMemoryRegionTrees();

6
mesosphere/kernel/source/arch/arm64/init/start.s
View File

@ -124,10 +124,10 @@ core0_el1:
/* At this point kernelldr has been invoked, and we are relocated at a random virtual address. */ /* At this point kernelldr has been invoked, and we are relocated at a random virtual address. */
/* Next thing to do is to set up our memory management and slabheaps -- all the other core initialization. */ /* Next thing to do is to set up our memory management and slabheaps -- all the other core initialization. */
/* Call ams::kern::init::InitializeCore(uintptr_t, uintptr_t) */ /* Call ams::kern::init::InitializeCore(uintptr_t, void **) */
mov x1, x0 /* Kernelldr returns a KInitialPageAllocator state for the kernel to re-use. */ mov x1, x0 /* Kernelldr returns a state object for the kernel to re-use. */
mov x0, xzr /* Official kernel always passes zero, when this is non-zero the address is mapped. */ mov x0, xzr /* Official kernel always passes zero, when this is non-zero the address is mapped. */
bl _ZN3ams4kern4init14InitializeCoreEmm bl _ZN3ams4kern4init14InitializeCoreEmPPv
/* Get the init arguments for core 0. */ /* Get the init arguments for core 0. */
mov x0, xzr mov x0, xzr

6
mesosphere/kernel_ldr/source/arch/arm64/start.s
View File

@ -110,10 +110,10 @@ _main:
str x0, [sp, #0x20] str x0, [sp, #0x20]
/* Call ams::kern::init::loader::GetFinalPageAllocatorState() */ /* Call ams::kern::init::loader::GetFinalState() */
bl _ZN3ams4kern4init6loader26GetFinalPageAllocatorStateEv bl _ZN3ams4kern4init6loader13GetFinalStateEv
/* X0 is now the saved state for the page allocator. */ /* X0 is now the saved state. */
/* We will return this to the kernel. */ /* We will return this to the kernel. */
/* Return to the newly-relocated kernel. */ /* Return to the newly-relocated kernel. */

29
mesosphere/kernel_ldr/source/kern_init_loader.cpp
View File

@ -42,9 +42,12 @@ namespace ams::kern::init::loader {
static_assert(InitialPageTableRegionSizeMax < KernelPageTableHeapSize + KernelInitialPageHeapSize); static_assert(InitialPageTableRegionSizeMax < KernelPageTableHeapSize + KernelInitialPageHeapSize);
/* Global Allocator. */ /* Global Allocator. */
KInitialPageAllocator g_initial_page_allocator; constinit KInitialPageAllocator g_initial_page_allocator;
KInitialPageAllocator::State g_final_page_allocator_state; constinit KInitialPageAllocator::State g_final_page_allocator_state;
constinit InitialProcessBinaryLayout g_initial_process_binary_layout;
constinit void *g_final_state[2];
void RelocateKernelPhysically(uintptr_t &base_address, KernelLayout *&layout) { void RelocateKernelPhysically(uintptr_t &base_address, KernelLayout *&layout) {
KPhysicalAddress correct_base = KSystemControl::Init::GetKernelPhysicalBaseAddress(base_address); KPhysicalAddress correct_base = KSystemControl::Init::GetKernelPhysicalBaseAddress(base_address);
@ -159,19 +162,21 @@ namespace ams::kern::init::loader {
/* Determine the size of the resource region. */ /* Determine the size of the resource region. */
const size_t resource_region_size = KMemoryLayout::GetResourceRegionSizeForInit(); const size_t resource_region_size = KMemoryLayout::GetResourceRegionSizeForInit();
const uintptr_t resource_end_address = base_address + resource_offset + resource_region_size;
/* Setup the INI1 header in memory for the kernel. */ /* Setup the INI1 header in memory for the kernel. */
const uintptr_t resource_end_address = base_address + resource_offset + resource_region_size; KSystemControl::Init::GetInitialProcessBinaryLayout(std::addressof(g_initial_process_binary_layout));
const uintptr_t ini_load_address = GetInteger(KSystemControl::Init::GetInitialProcessBinaryPhysicalAddress()); MESOSPHERE_INIT_ABORT_UNLESS(g_initial_process_binary_layout.address != 0);
if (ini_base_address != ini_load_address) {
if (ini_base_address != g_initial_process_binary_layout.address) {
/* The INI is not at the correct address, so we need to relocate it. */ /* The INI is not at the correct address, so we need to relocate it. */
const InitialProcessBinaryHeader *ini_header = reinterpret_cast<const InitialProcessBinaryHeader *>(ini_base_address); const InitialProcessBinaryHeader *ini_header = reinterpret_cast<const InitialProcessBinaryHeader *>(ini_base_address);
if (ini_header->magic == InitialProcessBinaryMagic && ini_header->size <= InitialProcessBinarySizeMax) { if (ini_header->magic == InitialProcessBinaryMagic && ini_header->size <= InitialProcessBinarySizeMax) {
/* INI is valid, relocate it. */ /* INI is valid, relocate it. */
std::memmove(reinterpret_cast<void *>(ini_load_address), ini_header, ini_header->size); std::memmove(reinterpret_cast<void *>(g_initial_process_binary_layout.address), ini_header, ini_header->size);
} else { } else {
/* INI is invalid. Make the destination header invalid. */ /* INI is invalid. Make the destination header invalid. */
std::memset(reinterpret_cast<void *>(ini_load_address), 0, sizeof(InitialProcessBinaryHeader)); std::memset(reinterpret_cast<void *>(g_initial_process_binary_layout.address), 0, sizeof(InitialProcessBinaryHeader));
} }
} }
@ -225,9 +230,15 @@ namespace ams::kern::init::loader {
return g_initial_page_allocator.Allocate(PageSize) + PageSize; return g_initial_page_allocator.Allocate(PageSize) + PageSize;
} }
uintptr_t GetFinalPageAllocatorState() { void **GetFinalState() {
/* Get final page allocator state. */
g_initial_page_allocator.GetFinalState(std::addressof(g_final_page_allocator_state)); g_initial_page_allocator.GetFinalState(std::addressof(g_final_page_allocator_state));
return reinterpret_cast<uintptr_t>(std::addressof(g_final_page_allocator_state));
/* Setup final kernel loader state. */
g_final_state[0] = std::addressof(g_final_page_allocator_state);
g_final_state[1] = std::addressof(g_initial_process_binary_layout);
return g_final_state;
} }
} }