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