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Code Issues Releases Activity

hle: kernel: k_page_table: Update SetProcessMemoryPermission.

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This commit is contained in:
bunnei 2022-01-09 02:17:17 -08:00
parent 6ac44f3bdc
commit 49a0e4330e
6 changed files with 67 additions and 44 deletions
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71
src/core/hle/kernel/k_page_table.cpp
View file

@ -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;
}

3
src/core/hle/kernel/k_page_table.h
View file

@ -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);

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

@ -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::UserReadWrite);
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 {

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);
}

4
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,

7
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"
@ -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::UserReadWrite);
data_start, bss_end_addr - data_start, Kernel::Svc::MemoryPermission::ReadWrite);
}
void LoadModule(Kernel::HLERequestContext& ctx) {