diff options
Diffstat (limited to 'src/core/hle/kernel')
| -rw-r--r-- | src/core/hle/kernel/k_page_table.cpp | 27 | ||||
| -rw-r--r-- | src/core/hle/kernel/k_page_table.h | 1 | ||||
| -rw-r--r-- | src/core/hle/kernel/k_thread.cpp | 2 | ||||
| -rw-r--r-- | src/core/hle/kernel/svc.cpp | 32 | ||||
| -rw-r--r-- | src/core/hle/kernel/svc_wrap.h | 8 |
5 files changed, 69 insertions, 1 deletions
diff --git a/src/core/hle/kernel/k_page_table.cpp b/src/core/hle/kernel/k_page_table.cpp index 99982e5a3..f2f88c147 100644 --- a/src/core/hle/kernel/k_page_table.cpp +++ b/src/core/hle/kernel/k_page_table.cpp @@ -806,6 +806,33 @@ ResultCode KPageTable::ResetTransferMemory(VAddr addr, std::size_t size) { KMemoryAttribute::Locked, KMemoryAttribute::IpcAndDeviceMapped)); block_manager->Update(addr, size / PageSize, state, KMemoryPermission::ReadAndWrite); + return ResultSuccess; +} + +ResultCode KPageTable::SetMemoryPermission(VAddr addr, std::size_t size, + Svc::MemoryPermission svc_perm) { + const size_t num_pages = size / PageSize; + + // Lock the table. + std::lock_guard lock{page_table_lock}; + + // Verify we can change the memory permission. + KMemoryState old_state; + KMemoryPermission old_perm; + R_TRY(this->CheckMemoryState( + std::addressof(old_state), std::addressof(old_perm), nullptr, addr, size, + KMemoryState::FlagCanReprotect, KMemoryState::FlagCanReprotect, KMemoryPermission::None, + KMemoryPermission::None, KMemoryAttribute::All, KMemoryAttribute::None)); + + // Determine new perm. + const KMemoryPermission new_perm = ConvertToKMemoryPermission(svc_perm); + R_SUCCEED_IF(old_perm == new_perm); + + // Perform mapping operation. + R_TRY(Operate(addr, num_pages, new_perm, OperationType::ChangePermissions)); + + // Update the blocks. + block_manager->Update(addr, num_pages, old_state, new_perm, KMemoryAttribute::None); return ResultSuccess; } diff --git a/src/core/hle/kernel/k_page_table.h b/src/core/hle/kernel/k_page_table.h index d784aa67e..db08ea8ce 100644 --- a/src/core/hle/kernel/k_page_table.h +++ b/src/core/hle/kernel/k_page_table.h @@ -47,6 +47,7 @@ public: KMemoryInfo QueryInfo(VAddr addr); ResultCode ReserveTransferMemory(VAddr addr, std::size_t size, KMemoryPermission perm); ResultCode ResetTransferMemory(VAddr addr, std::size_t size); + ResultCode SetMemoryPermission(VAddr addr, std::size_t size, Svc::MemoryPermission perm); ResultCode SetMemoryAttribute(VAddr addr, std::size_t size, KMemoryAttribute mask, KMemoryAttribute value); ResultCode SetHeapCapacity(std::size_t new_heap_capacity); diff --git a/src/core/hle/kernel/k_thread.cpp b/src/core/hle/kernel/k_thread.cpp index 752592e2e..b8c993748 100644 --- a/src/core/hle/kernel/k_thread.cpp +++ b/src/core/hle/kernel/k_thread.cpp @@ -26,6 +26,7 @@ #include "core/hle/kernel/k_resource_limit.h" #include "core/hle/kernel/k_scheduler.h" #include "core/hle/kernel/k_scoped_scheduler_lock_and_sleep.h" +#include "core/hle/kernel/k_system_control.h" #include "core/hle/kernel/k_thread.h" #include "core/hle/kernel/k_thread_queue.h" #include "core/hle/kernel/kernel.h" @@ -50,6 +51,7 @@ static void ResetThreadContext64(Core::ARM_Interface::ThreadContext64& context, VAddr entry_point, u64 arg) { context = {}; context.cpu_registers[0] = arg; + context.cpu_registers[18] = Kernel::KSystemControl::GenerateRandomU64() | 1; context.pc = entry_point; context.sp = stack_top; // TODO(merry): Perform a hardware test to determine the below value. diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp index 37d67b72e..68cb47211 100644 --- a/src/core/hle/kernel/svc.cpp +++ b/src/core/hle/kernel/svc.cpp @@ -164,6 +164,36 @@ static ResultCode SetHeapSize32(Core::System& system, u32* heap_addr, u32 heap_s return result; } +constexpr bool IsValidSetMemoryPermission(MemoryPermission perm) { + switch (perm) { + case MemoryPermission::None: + case MemoryPermission::Read: + case MemoryPermission::ReadWrite: + return true; + default: + return false; + } +} + +static ResultCode SetMemoryPermission(Core::System& system, VAddr address, u64 size, + MemoryPermission perm) { + // Validate address / size. + R_UNLESS(Common::IsAligned(address, PageSize), ResultInvalidAddress); + R_UNLESS(Common::IsAligned(size, PageSize), ResultInvalidSize); + R_UNLESS(size > 0, ResultInvalidSize); + R_UNLESS((address < address + size), ResultInvalidCurrentMemory); + + // Validate the permission. + R_UNLESS(IsValidSetMemoryPermission(perm), ResultInvalidNewMemoryPermission); + + // Validate that the region is in range for the current process. + auto& page_table = system.Kernel().CurrentProcess()->PageTable(); + R_UNLESS(page_table.Contains(address, size), ResultInvalidCurrentMemory); + + // Set the memory attribute. + return page_table.SetMemoryPermission(address, size, perm); +} + static ResultCode SetMemoryAttribute(Core::System& system, VAddr address, u64 size, u32 mask, u32 attribute) { LOG_DEBUG(Kernel_SVC, @@ -2724,7 +2754,7 @@ static const FunctionDef SVC_Table_32[] = { static const FunctionDef SVC_Table_64[] = { {0x00, nullptr, "Unknown"}, {0x01, SvcWrap64<SetHeapSize>, "SetHeapSize"}, - {0x02, nullptr, "SetMemoryPermission"}, + {0x02, SvcWrap64<SetMemoryPermission>, "SetMemoryPermission"}, {0x03, SvcWrap64<SetMemoryAttribute>, "SetMemoryAttribute"}, {0x04, SvcWrap64<MapMemory>, "MapMemory"}, {0x05, SvcWrap64<UnmapMemory>, "UnmapMemory"}, diff --git a/src/core/hle/kernel/svc_wrap.h b/src/core/hle/kernel/svc_wrap.h index 86255fe6d..a60adfcab 100644 --- a/src/core/hle/kernel/svc_wrap.h +++ b/src/core/hle/kernel/svc_wrap.h @@ -249,6 +249,14 @@ void SvcWrap64(Core::System& system) { func(system, Param(system, 0), Param(system, 1), static_cast<u32>(Param(system, 2))).raw); } +// Used by SetMemoryPermission +template <ResultCode func(Core::System&, u64, u64, Svc::MemoryPermission)> +void SvcWrap64(Core::System& system) { + FuncReturn(system, func(system, Param(system, 0), Param(system, 1), + static_cast<Svc::MemoryPermission>(Param(system, 2))) + .raw); +} + // Used by MapSharedMemory template <ResultCode func(Core::System&, Handle, u64, u64, Svc::MemoryPermission)> void SvcWrap64(Core::System& system) { |