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-rw-r--r--src/core/hle/kernel/svc/svc_memory.cpp217
1 files changed, 217 insertions, 0 deletions
diff --git a/src/core/hle/kernel/svc/svc_memory.cpp b/src/core/hle/kernel/svc/svc_memory.cpp
new file mode 100644
index 000000000..214bcd073
--- /dev/null
+++ b/src/core/hle/kernel/svc/svc_memory.cpp
@@ -0,0 +1,217 @@
+// 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 IsValidSetMemoryPermission(MemoryPermission perm) {
+ switch (perm) {
+ case MemoryPermission::None:
+ case MemoryPermission::Read:
+ case MemoryPermission::ReadWrite:
+ return true;
+ default:
+ return false;
+ }
+}
+
+// Checks if address + size is greater than the given address
+// This can return false if the size causes an overflow of a 64-bit type
+// or if the given size is zero.
+constexpr bool IsValidAddressRange(VAddr address, u64 size) {
+ return address + size > address;
+}
+
+// Helper function that performs the common sanity checks for svcMapMemory
+// and svcUnmapMemory. This is doable, as both functions perform their sanitizing
+// in the same order.
+Result MapUnmapMemorySanityChecks(const KPageTable& manager, VAddr dst_addr, VAddr src_addr,
+ u64 size) {
+ if (!Common::Is4KBAligned(dst_addr)) {
+ LOG_ERROR(Kernel_SVC, "Destination address is not aligned to 4KB, 0x{:016X}", dst_addr);
+ return ResultInvalidAddress;
+ }
+
+ if (!Common::Is4KBAligned(src_addr)) {
+ LOG_ERROR(Kernel_SVC, "Source address is not aligned to 4KB, 0x{:016X}", src_addr);
+ return ResultInvalidSize;
+ }
+
+ if (size == 0) {
+ LOG_ERROR(Kernel_SVC, "Size is 0");
+ return ResultInvalidSize;
+ }
+
+ if (!Common::Is4KBAligned(size)) {
+ LOG_ERROR(Kernel_SVC, "Size is not aligned to 4KB, 0x{:016X}", size);
+ return ResultInvalidSize;
+ }
+
+ if (!IsValidAddressRange(dst_addr, size)) {
+ LOG_ERROR(Kernel_SVC,
+ "Destination is not a valid address range, addr=0x{:016X}, size=0x{:016X}",
+ dst_addr, size);
+ return ResultInvalidCurrentMemory;
+ }
+
+ if (!IsValidAddressRange(src_addr, size)) {
+ LOG_ERROR(Kernel_SVC, "Source is not a valid address range, addr=0x{:016X}, size=0x{:016X}",
+ src_addr, size);
+ return ResultInvalidCurrentMemory;
+ }
+
+ if (!manager.IsInsideAddressSpace(src_addr, size)) {
+ LOG_ERROR(Kernel_SVC,
+ "Source is not within the address space, addr=0x{:016X}, size=0x{:016X}",
+ src_addr, size);
+ return ResultInvalidCurrentMemory;
+ }
+
+ if (manager.IsOutsideStackRegion(dst_addr, size)) {
+ LOG_ERROR(Kernel_SVC,
+ "Destination is not within the stack region, addr=0x{:016X}, size=0x{:016X}",
+ dst_addr, size);
+ return ResultInvalidMemoryRegion;
+ }
+
+ if (manager.IsInsideHeapRegion(dst_addr, size)) {
+ LOG_ERROR(Kernel_SVC,
+ "Destination does not fit within the heap region, addr=0x{:016X}, "
+ "size=0x{:016X}",
+ dst_addr, size);
+ return ResultInvalidMemoryRegion;
+ }
+
+ if (manager.IsInsideAliasRegion(dst_addr, size)) {
+ LOG_ERROR(Kernel_SVC,
+ "Destination does not fit within the map region, addr=0x{:016X}, "
+ "size=0x{:016X}",
+ dst_addr, size);
+ return ResultInvalidMemoryRegion;
+ }
+
+ return ResultSuccess;
+}
+
+} // namespace
+
+Result SetMemoryPermission(Core::System& system, VAddr address, u64 size, MemoryPermission perm) {
+ LOG_DEBUG(Kernel_SVC, "called, address=0x{:016X}, size=0x{:X}, perm=0x{:08X", address, size,
+ 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 = GetCurrentProcess(system.Kernel()).PageTable();
+ R_UNLESS(page_table.Contains(address, size), ResultInvalidCurrentMemory);
+
+ // Set the memory attribute.
+ return page_table.SetMemoryPermission(address, size, perm);
+}
+
+Result SetMemoryAttribute(Core::System& system, VAddr address, u64 size, u32 mask, u32 attr) {
+ LOG_DEBUG(Kernel_SVC,
+ "called, address=0x{:016X}, size=0x{:X}, mask=0x{:08X}, attribute=0x{:08X}", address,
+ size, mask, attr);
+
+ // 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 attribute and mask.
+ constexpr u32 SupportedMask = static_cast<u32>(MemoryAttribute::Uncached);
+ R_UNLESS((mask | attr) == mask, ResultInvalidCombination);
+ R_UNLESS((mask | attr | SupportedMask) == SupportedMask, ResultInvalidCombination);
+
+ // Validate that the region is in range for the current process.
+ auto& page_table{GetCurrentProcess(system.Kernel()).PageTable()};
+ R_UNLESS(page_table.Contains(address, size), ResultInvalidCurrentMemory);
+
+ // Set the memory attribute.
+ return page_table.SetMemoryAttribute(address, size, mask, attr);
+}
+
+/// Maps a memory range into a different range.
+Result MapMemory(Core::System& system, VAddr dst_addr, VAddr src_addr, u64 size) {
+ LOG_TRACE(Kernel_SVC, "called, dst_addr=0x{:X}, src_addr=0x{:X}, size=0x{:X}", dst_addr,
+ src_addr, size);
+
+ auto& page_table{GetCurrentProcess(system.Kernel()).PageTable()};
+
+ if (const Result result{MapUnmapMemorySanityChecks(page_table, dst_addr, src_addr, size)};
+ result.IsError()) {
+ return result;
+ }
+
+ return page_table.MapMemory(dst_addr, src_addr, size);
+}
+
+/// Unmaps a region that was previously mapped with svcMapMemory
+Result UnmapMemory(Core::System& system, VAddr dst_addr, VAddr src_addr, u64 size) {
+ LOG_TRACE(Kernel_SVC, "called, dst_addr=0x{:X}, src_addr=0x{:X}, size=0x{:X}", dst_addr,
+ src_addr, size);
+
+ auto& page_table{GetCurrentProcess(system.Kernel()).PageTable()};
+
+ if (const Result result{MapUnmapMemorySanityChecks(page_table, dst_addr, src_addr, size)};
+ result.IsError()) {
+ return result;
+ }
+
+ return page_table.UnmapMemory(dst_addr, src_addr, size);
+}
+
+Result SetMemoryPermission64(Core::System& system, uint64_t address, uint64_t size,
+ MemoryPermission perm) {
+ R_RETURN(SetMemoryPermission(system, address, size, perm));
+}
+
+Result SetMemoryAttribute64(Core::System& system, uint64_t address, uint64_t size, uint32_t mask,
+ uint32_t attr) {
+ R_RETURN(SetMemoryAttribute(system, address, size, mask, attr));
+}
+
+Result MapMemory64(Core::System& system, uint64_t dst_address, uint64_t src_address,
+ uint64_t size) {
+ R_RETURN(MapMemory(system, dst_address, src_address, size));
+}
+
+Result UnmapMemory64(Core::System& system, uint64_t dst_address, uint64_t src_address,
+ uint64_t size) {
+ R_RETURN(UnmapMemory(system, dst_address, src_address, size));
+}
+
+Result SetMemoryPermission64From32(Core::System& system, uint32_t address, uint32_t size,
+ MemoryPermission perm) {
+ R_RETURN(SetMemoryPermission(system, address, size, perm));
+}
+
+Result SetMemoryAttribute64From32(Core::System& system, uint32_t address, uint32_t size,
+ uint32_t mask, uint32_t attr) {
+ R_RETURN(SetMemoryAttribute(system, address, size, mask, attr));
+}
+
+Result MapMemory64From32(Core::System& system, uint32_t dst_address, uint32_t src_address,
+ uint32_t size) {
+ R_RETURN(MapMemory(system, dst_address, src_address, size));
+}
+
+Result UnmapMemory64From32(Core::System& system, uint32_t dst_address, uint32_t src_address,
+ uint32_t size) {
+ R_RETURN(UnmapMemory(system, dst_address, src_address, size));
+}
+
+} // namespace Kernel::Svc
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-20 15:52:39 +0200