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// 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
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