diff options
Diffstat (limited to 'src/core/hle/kernel/svc/svc_process_memory.cpp')
-rw-r--r-- | src/core/hle/kernel/svc/svc_process_memory.cpp | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/src/core/hle/kernel/svc/svc_process_memory.cpp b/src/core/hle/kernel/svc/svc_process_memory.cpp new file mode 100644 index 000000000..b6ac43af2 --- /dev/null +++ b/src/core/hle/kernel/svc/svc_process_memory.cpp @@ -0,0 +1,274 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "core/core.h" +#include "core/hle/kernel/k_process.h" +#include "core/hle/kernel/svc.h" + +namespace Kernel::Svc { +namespace { + +constexpr bool IsValidAddressRange(VAddr address, u64 size) { + return address + size > address; +} + +constexpr bool IsValidProcessMemoryPermission(Svc::MemoryPermission perm) { + switch (perm) { + case Svc::MemoryPermission::None: + case Svc::MemoryPermission::Read: + case Svc::MemoryPermission::ReadWrite: + case Svc::MemoryPermission::ReadExecute: + return true; + default: + return false; + } +} + +} // namespace + +Result SetProcessMemoryPermission(Core::System& system, Handle process_handle, VAddr address, + u64 size, Svc::MemoryPermission perm) { + LOG_TRACE(Kernel_SVC, + "called, process_handle=0x{:X}, addr=0x{:X}, size=0x{:X}, permissions=0x{:08X}", + process_handle, address, size, perm); + + // Validate the 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); + 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); + + // Get the process from its handle. + KScopedAutoObject process = + system.CurrentProcess()->GetHandleTable().GetObject<KProcess>(process_handle); + R_UNLESS(process.IsNotNull(), ResultInvalidHandle); + + // Validate that the address is in range. + auto& page_table = process->PageTable(); + R_UNLESS(page_table.Contains(address, size), ResultInvalidCurrentMemory); + + // Set the memory permission. + return page_table.SetProcessMemoryPermission(address, size, perm); +} + +Result MapProcessMemory(Core::System& system, VAddr dst_address, Handle process_handle, + VAddr src_address, u64 size) { + LOG_TRACE(Kernel_SVC, + "called, dst_address=0x{:X}, process_handle=0x{:X}, src_address=0x{:X}, size=0x{:X}", + dst_address, process_handle, src_address, size); + + // Validate the address/size. + R_UNLESS(Common::IsAligned(dst_address, PageSize), ResultInvalidAddress); + R_UNLESS(Common::IsAligned(src_address, PageSize), ResultInvalidAddress); + R_UNLESS(Common::IsAligned(size, PageSize), ResultInvalidSize); + R_UNLESS(size > 0, ResultInvalidSize); + R_UNLESS((dst_address < dst_address + size), ResultInvalidCurrentMemory); + R_UNLESS((src_address < src_address + size), ResultInvalidCurrentMemory); + + // Get the processes. + KProcess* dst_process = system.CurrentProcess(); + KScopedAutoObject src_process = + dst_process->GetHandleTable().GetObjectWithoutPseudoHandle<KProcess>(process_handle); + R_UNLESS(src_process.IsNotNull(), ResultInvalidHandle); + + // Get the page tables. + auto& dst_pt = dst_process->PageTable(); + auto& src_pt = src_process->PageTable(); + + // Validate that the mapping is in range. + R_UNLESS(src_pt.Contains(src_address, size), ResultInvalidCurrentMemory); + R_UNLESS(dst_pt.CanContain(dst_address, size, KMemoryState::SharedCode), + ResultInvalidMemoryRegion); + + // Create a new page group. + KPageGroup pg{system.Kernel(), dst_pt.GetBlockInfoManager()}; + R_TRY(src_pt.MakeAndOpenPageGroup( + std::addressof(pg), src_address, size / PageSize, KMemoryState::FlagCanMapProcess, + KMemoryState::FlagCanMapProcess, KMemoryPermission::None, KMemoryPermission::None, + KMemoryAttribute::All, KMemoryAttribute::None)); + + // Map the group. + R_TRY(dst_pt.MapPageGroup(dst_address, pg, KMemoryState::SharedCode, + KMemoryPermission::UserReadWrite)); + + return ResultSuccess; +} + +Result UnmapProcessMemory(Core::System& system, VAddr dst_address, Handle process_handle, + VAddr src_address, u64 size) { + LOG_TRACE(Kernel_SVC, + "called, dst_address=0x{:X}, process_handle=0x{:X}, src_address=0x{:X}, size=0x{:X}", + dst_address, process_handle, src_address, size); + + // Validate the address/size. + R_UNLESS(Common::IsAligned(dst_address, PageSize), ResultInvalidAddress); + R_UNLESS(Common::IsAligned(src_address, PageSize), ResultInvalidAddress); + R_UNLESS(Common::IsAligned(size, PageSize), ResultInvalidSize); + R_UNLESS(size > 0, ResultInvalidSize); + R_UNLESS((dst_address < dst_address + size), ResultInvalidCurrentMemory); + R_UNLESS((src_address < src_address + size), ResultInvalidCurrentMemory); + + // Get the processes. + KProcess* dst_process = system.CurrentProcess(); + KScopedAutoObject src_process = + dst_process->GetHandleTable().GetObjectWithoutPseudoHandle<KProcess>(process_handle); + R_UNLESS(src_process.IsNotNull(), ResultInvalidHandle); + + // Get the page tables. + auto& dst_pt = dst_process->PageTable(); + auto& src_pt = src_process->PageTable(); + + // Validate that the mapping is in range. + R_UNLESS(src_pt.Contains(src_address, size), ResultInvalidCurrentMemory); + R_UNLESS(dst_pt.CanContain(dst_address, size, KMemoryState::SharedCode), + ResultInvalidMemoryRegion); + + // Unmap the memory. + R_TRY(dst_pt.UnmapProcessMemory(dst_address, size, src_pt, src_address)); + + return ResultSuccess; +} + +Result MapProcessCodeMemory(Core::System& system, Handle process_handle, u64 dst_address, + u64 src_address, u64 size) { + LOG_DEBUG(Kernel_SVC, + "called. process_handle=0x{:08X}, dst_address=0x{:016X}, " + "src_address=0x{:016X}, size=0x{:016X}", + process_handle, dst_address, src_address, size); + + if (!Common::Is4KBAligned(src_address)) { + LOG_ERROR(Kernel_SVC, "src_address is not page-aligned (src_address=0x{:016X}).", + src_address); + return ResultInvalidAddress; + } + + if (!Common::Is4KBAligned(dst_address)) { + LOG_ERROR(Kernel_SVC, "dst_address is not page-aligned (dst_address=0x{:016X}).", + dst_address); + return ResultInvalidAddress; + } + + if (size == 0 || !Common::Is4KBAligned(size)) { + LOG_ERROR(Kernel_SVC, "Size is zero or not page-aligned (size=0x{:016X})", size); + return ResultInvalidSize; + } + + if (!IsValidAddressRange(dst_address, size)) { + LOG_ERROR(Kernel_SVC, + "Destination address range overflows the address space (dst_address=0x{:016X}, " + "size=0x{:016X}).", + dst_address, size); + return ResultInvalidCurrentMemory; + } + + if (!IsValidAddressRange(src_address, size)) { + LOG_ERROR(Kernel_SVC, + "Source address range overflows the address space (src_address=0x{:016X}, " + "size=0x{:016X}).", + src_address, size); + return ResultInvalidCurrentMemory; + } + + const auto& handle_table = system.Kernel().CurrentProcess()->GetHandleTable(); + KScopedAutoObject process = handle_table.GetObject<KProcess>(process_handle); + if (process.IsNull()) { + LOG_ERROR(Kernel_SVC, "Invalid process handle specified (handle=0x{:08X}).", + process_handle); + return ResultInvalidHandle; + } + + auto& page_table = process->PageTable(); + if (!page_table.IsInsideAddressSpace(src_address, size)) { + LOG_ERROR(Kernel_SVC, + "Source address range is not within the address space (src_address=0x{:016X}, " + "size=0x{:016X}).", + src_address, size); + return ResultInvalidCurrentMemory; + } + + if (!page_table.IsInsideASLRRegion(dst_address, size)) { + LOG_ERROR(Kernel_SVC, + "Destination address range is not within the ASLR region (dst_address=0x{:016X}, " + "size=0x{:016X}).", + dst_address, size); + return ResultInvalidMemoryRegion; + } + + return page_table.MapCodeMemory(dst_address, src_address, size); +} + +Result UnmapProcessCodeMemory(Core::System& system, Handle process_handle, u64 dst_address, + u64 src_address, u64 size) { + LOG_DEBUG(Kernel_SVC, + "called. process_handle=0x{:08X}, dst_address=0x{:016X}, src_address=0x{:016X}, " + "size=0x{:016X}", + process_handle, dst_address, src_address, size); + + if (!Common::Is4KBAligned(dst_address)) { + LOG_ERROR(Kernel_SVC, "dst_address is not page-aligned (dst_address=0x{:016X}).", + dst_address); + return ResultInvalidAddress; + } + + if (!Common::Is4KBAligned(src_address)) { + LOG_ERROR(Kernel_SVC, "src_address is not page-aligned (src_address=0x{:016X}).", + src_address); + return ResultInvalidAddress; + } + + if (size == 0 || !Common::Is4KBAligned(size)) { + LOG_ERROR(Kernel_SVC, "Size is zero or not page-aligned (size=0x{:016X}).", size); + return ResultInvalidSize; + } + + if (!IsValidAddressRange(dst_address, size)) { + LOG_ERROR(Kernel_SVC, + "Destination address range overflows the address space (dst_address=0x{:016X}, " + "size=0x{:016X}).", + dst_address, size); + return ResultInvalidCurrentMemory; + } + + if (!IsValidAddressRange(src_address, size)) { + LOG_ERROR(Kernel_SVC, + "Source address range overflows the address space (src_address=0x{:016X}, " + "size=0x{:016X}).", + src_address, size); + return ResultInvalidCurrentMemory; + } + + const auto& handle_table = system.Kernel().CurrentProcess()->GetHandleTable(); + KScopedAutoObject process = handle_table.GetObject<KProcess>(process_handle); + if (process.IsNull()) { + LOG_ERROR(Kernel_SVC, "Invalid process handle specified (handle=0x{:08X}).", + process_handle); + return ResultInvalidHandle; + } + + auto& page_table = process->PageTable(); + if (!page_table.IsInsideAddressSpace(src_address, size)) { + LOG_ERROR(Kernel_SVC, + "Source address range is not within the address space (src_address=0x{:016X}, " + "size=0x{:016X}).", + src_address, size); + return ResultInvalidCurrentMemory; + } + + if (!page_table.IsInsideASLRRegion(dst_address, size)) { + LOG_ERROR(Kernel_SVC, + "Destination address range is not within the ASLR region (dst_address=0x{:016X}, " + "size=0x{:016X}).", + dst_address, size); + return ResultInvalidMemoryRegion; + } + + return page_table.UnmapCodeMemory(dst_address, src_address, size, + KPageTable::ICacheInvalidationStrategy::InvalidateAll); +} + +} // namespace Kernel::Svc |