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Code Issues Releases Activity

kernel: svc: Implement SetProcessMemoryPermission

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- Used by Skyline modding framework
This commit is contained in:
Morph 2021-11-20 20:23:59 -05:00
parent 281437c811
commit 2726d705f8
1 changed files with 41 additions and 1 deletions
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42
src/core/hle/kernel/svc.cpp
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@ -1183,6 +1183,18 @@ constexpr bool IsValidRemoteSharedMemoryPermission(Svc::MemoryPermission perm) {
return IsValidSharedMemoryPermission(perm) || perm == Svc::MemoryPermission::DontCare;
}
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;
}
}
static ResultCode MapSharedMemory(Core::System& system, Handle shmem_handle, VAddr address,
u64 size, Svc::MemoryPermission map_perm) {
LOG_TRACE(Kernel_SVC,
@ -1262,6 +1274,34 @@ static ResultCode UnmapSharedMemory32(Core::System& system, Handle shmem_handle,
return UnmapSharedMemory(system, shmem_handle, address, size);
}
static ResultCode 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);
// 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, ConvertToKMemoryPermission(perm));
}
static ResultCode QueryProcessMemory(Core::System& system, VAddr memory_info_address,
VAddr page_info_address, Handle process_handle,
VAddr address) {
@ -2588,7 +2628,7 @@ static const FunctionDef SVC_Table_64[] = {
{0x70, nullptr, "CreatePort"},
{0x71, nullptr, "ManageNamedPort"},
{0x72, nullptr, "ConnectToPort"},
{0x73, nullptr, "SetProcessMemoryPermission"},
{0x73, SvcWrap64<SetProcessMemoryPermission>, "SetProcessMemoryPermission"},
{0x74, nullptr, "MapProcessMemory"},
{0x75, nullptr, "UnmapProcessMemory"},
{0x76, SvcWrap64<QueryProcessMemory>, "QueryProcessMemory"},