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Merge pull request #7698 from bunnei/mem-code-memory-updates

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Kernel Memory Updates (Part 2): SetProcessMemoryPermission, update permissions, and other minor changes.
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Mai M 2022-01-14 00:41:17 -05:00 committed by GitHub
commit 07e477f891
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 106 additions and 80 deletions
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103
src/core/hle/kernel/k_page_table.cpp
View file

@ -298,7 +298,7 @@ ResultCode KPageTable::MapProcessCode(VAddr addr, std::size_t num_pages, KMemory
return ResultSuccess;
}
ResultCode KPageTable::MapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) {
ResultCode KPageTable::MapCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
const std::size_t num_pages{size / PageSize};
@ -307,7 +307,7 @@ ResultCode KPageTable::MapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std:
KMemoryPermission perm{};
CASCADE_CODE(CheckMemoryState(&state, &perm, nullptr, nullptr, src_addr, size,
KMemoryState::All, KMemoryState::Normal, KMemoryPermission::All,
KMemoryPermission::ReadAndWrite, KMemoryAttribute::Mask,
KMemoryPermission::UserReadWrite, KMemoryAttribute::Mask,
KMemoryAttribute::None, KMemoryAttribute::IpcAndDeviceMapped));
if (IsRegionMapped(dst_addr, size)) {
@ -335,7 +335,7 @@ ResultCode KPageTable::MapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std:
return ResultSuccess;
}
ResultCode KPageTable::UnmapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) {
ResultCode KPageTable::UnmapCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) {
std::lock_guard lock{page_table_lock};
if (!size) {
@ -361,7 +361,7 @@ ResultCode KPageTable::UnmapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, st
block_manager->Update(dst_addr, num_pages, KMemoryState::Free);
block_manager->Update(src_addr, num_pages, KMemoryState::Normal,
KMemoryPermission::ReadAndWrite);
KMemoryPermission::UserReadWrite);
system.InvalidateCpuInstructionCacheRange(dst_addr, size);
@ -416,7 +416,7 @@ void KPageTable::MapPhysicalMemory(KPageLinkedList& page_linked_list, VAddr star
}
const std::size_t num_pages{std::min(src_num_pages, dst_num_pages)};
Operate(dst_addr, num_pages, KMemoryPermission::ReadAndWrite, OperationType::Map,
Operate(dst_addr, num_pages, KMemoryPermission::UserReadWrite, OperationType::Map,
map_addr);
dst_addr += num_pages * PageSize;
@ -470,7 +470,7 @@ ResultCode KPageTable::MapPhysicalMemory(VAddr addr, std::size_t size) {
const std::size_t num_pages{size / PageSize};
block_manager->Update(addr, num_pages, KMemoryState::Free, KMemoryPermission::None,
KMemoryAttribute::None, KMemoryState::Normal,
KMemoryPermission::ReadAndWrite, KMemoryAttribute::None);
KMemoryPermission::UserReadWrite, KMemoryAttribute::None);
return ResultSuccess;
}
@ -554,7 +554,7 @@ ResultCode KPageTable::Map(VAddr dst_addr, VAddr src_addr, std::size_t size) {
KMemoryState src_state{};
CASCADE_CODE(CheckMemoryState(
&src_state, nullptr, nullptr, nullptr, src_addr, size, KMemoryState::FlagCanAlias,
KMemoryState::FlagCanAlias, KMemoryPermission::All, KMemoryPermission::ReadAndWrite,
KMemoryState::FlagCanAlias, KMemoryPermission::All, KMemoryPermission::UserReadWrite,
KMemoryAttribute::Mask, KMemoryAttribute::None, KMemoryAttribute::IpcAndDeviceMapped));
if (IsRegionMapped(dst_addr, size)) {
@ -568,13 +568,13 @@ ResultCode KPageTable::Map(VAddr dst_addr, VAddr src_addr, std::size_t size) {
{
auto block_guard = detail::ScopeExit([&] {
Operate(src_addr, num_pages, KMemoryPermission::ReadAndWrite,
Operate(src_addr, num_pages, KMemoryPermission::UserReadWrite,
OperationType::ChangePermissions);
});
CASCADE_CODE(Operate(src_addr, num_pages, KMemoryPermission::None,
OperationType::ChangePermissions));
CASCADE_CODE(MapPages(dst_addr, page_linked_list, KMemoryPermission::ReadAndWrite));
CASCADE_CODE(MapPages(dst_addr, page_linked_list, KMemoryPermission::UserReadWrite));
block_guard.Cancel();
}
@ -582,7 +582,7 @@ ResultCode KPageTable::Map(VAddr dst_addr, VAddr src_addr, std::size_t size) {
block_manager->Update(src_addr, num_pages, src_state, KMemoryPermission::None,
KMemoryAttribute::Locked);
block_manager->Update(dst_addr, num_pages, KMemoryState::Stack,
KMemoryPermission::ReadAndWrite);
KMemoryPermission::UserReadWrite);
return ResultSuccess;
}
@ -617,13 +617,13 @@ ResultCode KPageTable::Unmap(VAddr dst_addr, VAddr src_addr, std::size_t size) {
auto block_guard = detail::ScopeExit([&] { MapPages(dst_addr, dst_pages, dst_perm); });
CASCADE_CODE(Operate(dst_addr, num_pages, KMemoryPermission::None, OperationType::Unmap));
CASCADE_CODE(Operate(src_addr, num_pages, KMemoryPermission::ReadAndWrite,
CASCADE_CODE(Operate(src_addr, num_pages, KMemoryPermission::UserReadWrite,
OperationType::ChangePermissions));
block_guard.Cancel();
}
block_manager->Update(src_addr, num_pages, src_state, KMemoryPermission::ReadAndWrite);
block_manager->Update(src_addr, num_pages, src_state, KMemoryPermission::UserReadWrite);
block_manager->Update(dst_addr, num_pages, KMemoryState::Free);
return ResultSuccess;
@ -713,50 +713,61 @@ ResultCode KPageTable::UnmapPages(VAddr addr, KPageLinkedList& page_linked_list,
}
ResultCode KPageTable::SetProcessMemoryPermission(VAddr addr, std::size_t size,
KMemoryPermission perm) {
Svc::MemoryPermission svc_perm) {
const size_t num_pages = size / PageSize;
// Lock the table.
std::lock_guard lock{page_table_lock};
KMemoryState prev_state{};
KMemoryPermission prev_perm{};
// Verify we can change the memory permission.
KMemoryState old_state;
KMemoryPermission old_perm;
size_t num_allocator_blocks;
R_TRY(this->CheckMemoryState(std::addressof(old_state), std::addressof(old_perm), nullptr,
std::addressof(num_allocator_blocks), addr, size,
KMemoryState::FlagCode, KMemoryState::FlagCode,
KMemoryPermission::None, KMemoryPermission::None,
KMemoryAttribute::All, KMemoryAttribute::None));
CASCADE_CODE(CheckMemoryState(
&prev_state, &prev_perm, nullptr, nullptr, addr, size, KMemoryState::FlagCode,
KMemoryState::FlagCode, KMemoryPermission::None, KMemoryPermission::None,
KMemoryAttribute::Mask, KMemoryAttribute::None, KMemoryAttribute::IpcAndDeviceMapped));
// Determine new perm/state.
const KMemoryPermission new_perm = ConvertToKMemoryPermission(svc_perm);
KMemoryState new_state = old_state;
const bool is_w = (new_perm & KMemoryPermission::UserWrite) == KMemoryPermission::UserWrite;
const bool is_x = (new_perm & KMemoryPermission::UserExecute) == KMemoryPermission::UserExecute;
const bool was_x =
(old_perm & KMemoryPermission::UserExecute) == KMemoryPermission::UserExecute;
ASSERT(!(is_w && is_x));
KMemoryState state{prev_state};
// Ensure state is mutable if permission allows write
if ((perm & KMemoryPermission::Write) != KMemoryPermission::None) {
if (prev_state == KMemoryState::Code) {
state = KMemoryState::CodeData;
} else if (prev_state == KMemoryState::AliasCode) {
state = KMemoryState::AliasCodeData;
} else {
if (is_w) {
switch (old_state) {
case KMemoryState::Code:
new_state = KMemoryState::CodeData;
break;
case KMemoryState::AliasCode:
new_state = KMemoryState::AliasCodeData;
break;
default:
UNREACHABLE();
}
}
// Return early if there is nothing to change
if (state == prev_state && perm == prev_perm) {
return ResultSuccess;
}
// Succeed if there's nothing to do.
R_SUCCEED_IF(old_perm == new_perm && old_state == new_state);
if ((prev_perm & KMemoryPermission::Execute) != (perm & KMemoryPermission::Execute)) {
// Perform mapping operation.
const auto operation =
was_x ? OperationType::ChangePermissionsAndRefresh : OperationType::ChangePermissions;
R_TRY(Operate(addr, num_pages, new_perm, operation));
// Update the blocks.
block_manager->Update(addr, num_pages, new_state, new_perm, KMemoryAttribute::None);
// Ensure cache coherency, if we're setting pages as executable.
if (is_x) {
// Memory execution state is changing, invalidate CPU cache range
system.InvalidateCpuInstructionCacheRange(addr, size);
}
const std::size_t num_pages{size / PageSize};
const OperationType operation{(perm & KMemoryPermission::Execute) != KMemoryPermission::None
? OperationType::ChangePermissionsAndRefresh
: OperationType::ChangePermissions};
CASCADE_CODE(Operate(addr, num_pages, perm, operation));
block_manager->Update(addr, num_pages, state, perm);
return ResultSuccess;
}
@ -785,7 +796,7 @@ ResultCode KPageTable::ReserveTransferMemory(VAddr addr, std::size_t size, KMemo
&state, nullptr, &attribute, nullptr, addr, size,
KMemoryState::FlagCanTransfer | KMemoryState::FlagReferenceCounted,
KMemoryState::FlagCanTransfer | KMemoryState::FlagReferenceCounted, KMemoryPermission::All,
KMemoryPermission::ReadAndWrite, KMemoryAttribute::Mask, KMemoryAttribute::None,
KMemoryPermission::UserReadWrite, KMemoryAttribute::Mask, KMemoryAttribute::None,
KMemoryAttribute::IpcAndDeviceMapped));
block_manager->Update(addr, size / PageSize, state, perm, attribute | KMemoryAttribute::Locked);
@ -805,7 +816,7 @@ ResultCode KPageTable::ResetTransferMemory(VAddr addr, std::size_t size) {
KMemoryPermission::None, KMemoryPermission::None, KMemoryAttribute::Mask,
KMemoryAttribute::Locked, KMemoryAttribute::IpcAndDeviceMapped));
block_manager->Update(addr, size / PageSize, state, KMemoryPermission::ReadAndWrite);
block_manager->Update(addr, size / PageSize, state, KMemoryPermission::UserReadWrite);
return ResultSuccess;
}
@ -906,7 +917,7 @@ ResultCode KPageTable::SetHeapSize(VAddr* out, std::size_t size) {
R_TRY(this->CheckMemoryState(std::addressof(num_allocator_blocks),
heap_region_start + size, GetHeapSize() - size,
KMemoryState::All, KMemoryState::Normal,
KMemoryPermission::All, KMemoryPermission::ReadAndWrite,
KMemoryPermission::All, KMemoryPermission::UserReadWrite,
KMemoryAttribute::All, KMemoryAttribute::None));
// Unmap the end of the heap.
@ -981,7 +992,7 @@ ResultCode KPageTable::SetHeapSize(VAddr* out, std::size_t size) {
// Apply the memory block update.
block_manager->Update(current_heap_end, num_pages, KMemoryState::Normal,
KMemoryPermission::ReadAndWrite, KMemoryAttribute::None);
KMemoryPermission::UserReadWrite, KMemoryAttribute::None);
// Update the current heap end.
current_heap_end = heap_region_start + size;

7
src/core/hle/kernel/k_page_table.h
View file

@ -31,8 +31,8 @@ public:
KMemoryManager::Pool pool);
ResultCode MapProcessCode(VAddr addr, std::size_t pages_count, KMemoryState state,
KMemoryPermission perm);
ResultCode MapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
ResultCode UnmapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
ResultCode MapCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
ResultCode UnmapCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
ResultCode UnmapProcessMemory(VAddr dst_addr, std::size_t size, KPageTable& src_page_table,
VAddr src_addr);
ResultCode MapPhysicalMemory(VAddr addr, std::size_t size);
@ -43,7 +43,8 @@ public:
ResultCode MapPages(VAddr addr, KPageLinkedList& page_linked_list, KMemoryState state,
KMemoryPermission perm);
ResultCode UnmapPages(VAddr addr, KPageLinkedList& page_linked_list, KMemoryState state);
ResultCode SetProcessMemoryPermission(VAddr addr, std::size_t size, KMemoryPermission perm);
ResultCode SetProcessMemoryPermission(VAddr addr, std::size_t size,
Svc::MemoryPermission svc_perm);
KMemoryInfo QueryInfo(VAddr addr);
ResultCode ReserveTransferMemory(VAddr addr, std::size_t size, KMemoryPermission perm);
ResultCode ResetTransferMemory(VAddr addr, std::size_t size);

12
src/core/hle/kernel/k_process.cpp
View file

@ -509,7 +509,7 @@ VAddr KProcess::CreateTLSRegion() {
const VAddr tls_page_addr{page_table
->AllocateAndMapMemory(1, PageSize, true, start, size / PageSize,
KMemoryState::ThreadLocal,
KMemoryPermission::ReadAndWrite,
KMemoryPermission::UserReadWrite,
tls_map_addr)
.ValueOr(0)};
@ -541,16 +541,16 @@ void KProcess::FreeTLSRegion(VAddr tls_address) {
void KProcess::LoadModule(CodeSet code_set, VAddr base_addr) {
const auto ReprotectSegment = [&](const CodeSet::Segment& segment,
KMemoryPermission permission) {
Svc::MemoryPermission permission) {
page_table->SetProcessMemoryPermission(segment.addr + base_addr, segment.size, permission);
};
kernel.System().Memory().WriteBlock(*this, base_addr, code_set.memory.data(),
code_set.memory.size());
ReprotectSegment(code_set.CodeSegment(), KMemoryPermission::ReadAndExecute);
ReprotectSegment(code_set.RODataSegment(), KMemoryPermission::Read);
ReprotectSegment(code_set.DataSegment(), KMemoryPermission::ReadAndWrite);
ReprotectSegment(code_set.CodeSegment(), Svc::MemoryPermission::ReadExecute);
ReprotectSegment(code_set.RODataSegment(), Svc::MemoryPermission::Read);
ReprotectSegment(code_set.DataSegment(), Svc::MemoryPermission::ReadWrite);
}
bool KProcess::IsSignaled() const {
@ -587,7 +587,7 @@ ResultCode KProcess::AllocateMainThreadStack(std::size_t stack_size) {
CASCADE_RESULT(main_thread_stack_top,
page_table->AllocateAndMapMemory(
main_thread_stack_size / PageSize, PageSize, false, start, size / PageSize,
KMemoryState::Stack, KMemoryPermission::ReadAndWrite));
KMemoryState::Stack, KMemoryPermission::UserReadWrite));
main_thread_stack_top += main_thread_stack_size;

18
src/core/hle/kernel/physical_core.cpp
View file

@ -16,17 +16,25 @@ namespace Kernel {
PhysicalCore::PhysicalCore(std::size_t core_index_, Core::System& system_, KScheduler& scheduler_,
Core::CPUInterrupts& interrupts_)
: core_index{core_index_}, system{system_}, scheduler{scheduler_},
interrupts{interrupts_}, guard{std::make_unique<Common::SpinLock>()} {}
interrupts{interrupts_}, guard{std::make_unique<Common::SpinLock>()} {
#ifdef ARCHITECTURE_x86_64
// TODO(bunnei): Initialization relies on a core being available. We may later replace this with
// a 32-bit instance of Dynarmic. This should be abstracted out to a CPU manager.
auto& kernel = system.Kernel();
arm_interface = std::make_unique<Core::ARM_Dynarmic_64>(
system, interrupts, kernel.IsMulticore(), kernel.GetExclusiveMonitor(), core_index);
#else
#error Platform not supported yet.
#endif
}
PhysicalCore::~PhysicalCore() = default;
void PhysicalCore::Initialize([[maybe_unused]] bool is_64_bit) {
#ifdef ARCHITECTURE_x86_64
auto& kernel = system.Kernel();
if (is_64_bit) {
arm_interface = std::make_unique<Core::ARM_Dynarmic_64>(
system, interrupts, kernel.IsMulticore(), kernel.GetExclusiveMonitor(), core_index);
} else {
if (!is_64_bit) {
// We already initialized a 64-bit core, replace with a 32-bit one.
arm_interface = std::make_unique<Core::ARM_Dynarmic_32>(
system, interrupts, kernel.IsMulticore(), kernel.GetExclusiveMonitor(), core_index);
}

8
src/core/hle/kernel/svc.cpp
View file

@ -1309,6 +1309,8 @@ static ResultCode SetProcessMemoryPermission(Core::System& system, Handle proces
R_UNLESS(Common::IsAligned(size, PageSize), ResultInvalidSize);
R_UNLESS(size > 0, ResultInvalidSize);
R_UNLESS((address < address + size), ResultInvalidCurrentMemory);
R_UNLESS(address == static_cast<uintptr_t>(address), ResultInvalidCurrentMemory);
R_UNLESS(size == static_cast<size_t>(size), ResultInvalidCurrentMemory);
// Validate the memory permission.
R_UNLESS(IsValidProcessMemoryPermission(perm), ResultInvalidNewMemoryPermission);
@ -1323,7 +1325,7 @@ static ResultCode SetProcessMemoryPermission(Core::System& system, Handle proces
R_UNLESS(page_table.Contains(address, size), ResultInvalidCurrentMemory);
// Set the memory permission.
return page_table.SetProcessMemoryPermission(address, size, ConvertToKMemoryPermission(perm));
return page_table.SetProcessMemoryPermission(address, size, perm);
}
static ResultCode MapProcessMemory(Core::System& system, VAddr dst_address, Handle process_handle,
@ -1626,7 +1628,7 @@ static ResultCode MapProcessCodeMemory(Core::System& system, Handle process_hand
return ResultInvalidMemoryRegion;
}
return page_table.MapProcessCodeMemory(dst_address, src_address, size);
return page_table.MapCodeMemory(dst_address, src_address, size);
}
static ResultCode UnmapProcessCodeMemory(Core::System& system, Handle process_handle,
@ -1694,7 +1696,7 @@ static ResultCode UnmapProcessCodeMemory(Core::System& system, Handle process_ha
return ResultInvalidMemoryRegion;
}
return page_table.UnmapProcessCodeMemory(dst_address, src_address, size);
return page_table.UnmapCodeMemory(dst_address, src_address, size);
}
/// Exits the current process

38
src/core/hle/service/ldr/ldr.cpp
View file

@ -14,6 +14,7 @@
#include "core/hle/kernel/k_page_table.h"
#include "core/hle/kernel/k_system_control.h"
#include "core/hle/kernel/svc_results.h"
#include "core/hle/kernel/svc_types.h"
#include "core/hle/service/ldr/ldr.h"
#include "core/hle/service/service.h"
#include "core/loader/nro.h"
@ -325,7 +326,7 @@ public:
for (std::size_t retry = 0; retry < MAXIMUM_MAP_RETRIES; retry++) {
auto& page_table{process->PageTable()};
const VAddr addr{GetRandomMapRegion(page_table, size)};
const ResultCode result{page_table.MapProcessCodeMemory(addr, baseAddress, size)};
const ResultCode result{page_table.MapCodeMemory(addr, baseAddress, size)};
if (result == Kernel::ResultInvalidCurrentMemory) {
continue;
@ -351,12 +352,12 @@ public:
if (bss_size) {
auto block_guard = detail::ScopeExit([&] {
page_table.UnmapProcessCodeMemory(addr + nro_size, bss_addr, bss_size);
page_table.UnmapProcessCodeMemory(addr, nro_addr, nro_size);
page_table.UnmapCodeMemory(addr + nro_size, bss_addr, bss_size);
page_table.UnmapCodeMemory(addr, nro_addr, nro_size);
});
const ResultCode result{
page_table.MapProcessCodeMemory(addr + nro_size, bss_addr, bss_size)};
page_table.MapCodeMemory(addr + nro_size, bss_addr, bss_size)};
if (result == Kernel::ResultInvalidCurrentMemory) {
continue;
@ -397,12 +398,12 @@ public:
nro_header.segment_headers[DATA_INDEX].memory_size);
CASCADE_CODE(process->PageTable().SetProcessMemoryPermission(
text_start, ro_start - text_start, Kernel::KMemoryPermission::ReadAndExecute));
text_start, ro_start - text_start, Kernel::Svc::MemoryPermission::ReadExecute));
CASCADE_CODE(process->PageTable().SetProcessMemoryPermission(
ro_start, data_start - ro_start, Kernel::KMemoryPermission::Read));
ro_start, data_start - ro_start, Kernel::Svc::MemoryPermission::Read));
return process->PageTable().SetProcessMemoryPermission(
data_start, bss_end_addr - data_start, Kernel::KMemoryPermission::ReadAndWrite);
data_start, bss_end_addr - data_start, Kernel::Svc::MemoryPermission::ReadWrite);
}
void LoadModule(Kernel::HLERequestContext& ctx) {
@ -530,16 +531,19 @@ public:
ResultCode UnmapNro(const NROInfo& info) {
// Each region must be unmapped separately to validate memory state
auto& page_table{system.CurrentProcess()->PageTable()};
CASCADE_CODE(page_table.UnmapProcessCodeMemory(info.nro_address + info.text_size +
info.ro_size + info.data_size,
info.bss_address, info.bss_size));
CASCADE_CODE(page_table.UnmapProcessCodeMemory(
info.nro_address + info.text_size + info.ro_size,
info.src_addr + info.text_size + info.ro_size, info.data_size));
CASCADE_CODE(page_table.UnmapProcessCodeMemory(
info.nro_address + info.text_size, info.src_addr + info.text_size, info.ro_size));
CASCADE_CODE(
page_table.UnmapProcessCodeMemory(info.nro_address, info.src_addr, info.text_size));
if (info.bss_size != 0) {
CASCADE_CODE(page_table.UnmapCodeMemory(info.nro_address + info.text_size +
info.ro_size + info.data_size,
info.bss_address, info.bss_size));
}
CASCADE_CODE(page_table.UnmapCodeMemory(info.nro_address + info.text_size + info.ro_size,
info.src_addr + info.text_size + info.ro_size,
info.data_size));
CASCADE_CODE(page_table.UnmapCodeMemory(info.nro_address + info.text_size,
info.src_addr + info.text_size, info.ro_size));
CASCADE_CODE(page_table.UnmapCodeMemory(info.nro_address, info.src_addr, info.text_size));
return ResultSuccess;
}