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kern: implement KCodeMemory (and SVCs)

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Michael Scire 2020-07-28 15:09:07 -07:00 committed by SciresM
parent 3fb3beeaff
commit 39b22cee8c
6 changed files with 152 additions and 10 deletions
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4
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_process_page_table.hpp
View file

@ -156,8 +156,8 @@ namespace ams::kern::arch::arm64 {
return this->page_table.UnlockForTransferMemory(address, size, pg);
}
Result LockForCodeMemory(KPageGroup *out, KProcessAddress address, size_t size, KMemoryPermission perm) {
return this->page_table.LockForCodeMemory(out, address, size, perm);
Result LockForCodeMemory(KPageGroup *out, KProcessAddress address, size_t size) {
return this->page_table.LockForCodeMemory(out, address, size);
}
Result UnlockForCodeMemory(KProcessAddress address, size_t size, const KPageGroup &pg) {

29
libraries/libmesosphere/include/mesosphere/kern_k_code_memory.hpp
View file

@ -22,8 +22,35 @@ namespace ams::kern {
class KCodeMemory final : public KAutoObjectWithSlabHeapAndContainer<KCodeMemory, KAutoObjectWithList> {
MESOSPHERE_AUTOOBJECT_TRAITS(KCodeMemory, KAutoObject);
private:
TYPED_STORAGE(KPageGroup) page_group;
KProcess *owner;
KProcessAddress address;
KLightLock lock;
bool is_initialized;
bool is_owner_mapped;
bool is_mapped;
public:
/* TODO: This is a placeholder definition. */
explicit KCodeMemory() : owner(nullptr), address(Null<KProcessAddress>), is_initialized(false), is_owner_mapped(false), is_mapped(false) {
/* ... */
}
virtual ~KCodeMemory() { /* ... */ }
Result Initialize(KProcessAddress address, size_t size);
virtual void Finalize() override;
Result Map(KProcessAddress address, size_t size);
Result Unmap(KProcessAddress address, size_t size);
Result MapToOwner(KProcessAddress address, size_t size, ams::svc::MemoryPermission perm);
Result UnmapFromOwner(KProcessAddress address, size_t size);
virtual bool IsInitialized() const override { return this->is_initialized; }
static void PostDestroy(uintptr_t arg) { /* ... */ }
KProcess *GetOwner() const { return this->owner; }
KProcessAddress GetSourceAddress() { return this->address; }
size_t GetSize() const { return this->is_initialized ? GetReference(this->page_group).GetNumPages() * PageSize : 0; }
};
}

2
libraries/libmesosphere/include/mesosphere/kern_k_page_table_base.hpp
View file

@ -331,7 +331,7 @@ namespace ams::kern {
Result LockForTransferMemory(KPageGroup *out, KProcessAddress address, size_t size, KMemoryPermission perm);
Result UnlockForTransferMemory(KProcessAddress address, size_t size, const KPageGroup &pg);
Result LockForCodeMemory(KPageGroup *out, KProcessAddress address, size_t size, KMemoryPermission perm);
Result LockForCodeMemory(KPageGroup *out, KProcessAddress address, size_t size);
Result UnlockForCodeMemory(KProcessAddress address, size_t size, const KPageGroup &pg);
Result CopyMemoryFromLinearToUser(KProcessAddress dst_addr, size_t size, KProcessAddress src_addr, u32 src_state_mask, u32 src_state, KMemoryPermission src_test_perm, u32 src_attr_mask, u32 src_attr);

2
libraries/libmesosphere/source/kern_k_page_table_base.cpp
View file

@ -1981,7 +1981,7 @@ namespace ams::kern {
KMemoryAttribute_AnyLocked | KMemoryAttribute_Locked, std::addressof(pg));
}
Result KPageTableBase::LockForCodeMemory(KPageGroup *out, KProcessAddress address, size_t size, KMemoryPermission perm) {
Result KPageTableBase::LockForCodeMemory(KPageGroup *out, KProcessAddress address, size_t size) {
return this->LockMemoryAndOpen(out, nullptr, address, size,
KMemoryState_FlagCanCodeMemory, KMemoryState_FlagCanCodeMemory,
KMemoryPermission_All, KMemoryPermission_UserReadWrite,

2
libraries/libmesosphere/source/kern_k_transfer_memory.cpp
View file

@ -48,7 +48,7 @@ namespace ams::kern {
void KTransferMemory::Finalize() {
MESOSPHERE_ASSERT_THIS();
/* Unmap. */
/* Unlock. */
if (!this->is_mapped) {
const size_t size = GetReference(this->page_group).GetNumPages() * PageSize;
MESOSPHERE_R_ABORT_UNLESS(this->owner->GetPageTable().UnlockForTransferMemory(this->address, size, GetReference(this->page_group)));

123
libraries/libmesosphere/source/svc/kern_svc_code_memory.cpp
View file

@ -21,28 +21,143 @@ namespace ams::kern::svc {
namespace {
constexpr bool IsValidMapCodeMemoryPermission(ams::svc::MemoryPermission perm) {
return perm == ams::svc::MemoryPermission_ReadWrite;
}
constexpr bool IsValidMapToOwnerCodeMemoryPermission(ams::svc::MemoryPermission perm) {
return perm == ams::svc::MemoryPermission_Read || perm == ams::svc::MemoryPermission_ReadExecute;
}
constexpr bool IsValidUnmapCodeMemoryPermission(ams::svc::MemoryPermission perm) {
return perm == ams::svc::MemoryPermission_None;
}
constexpr bool IsValidUnmapFromOwnerCodeMemoryPermission(ams::svc::MemoryPermission perm) {
return perm == ams::svc::MemoryPermission_None;
}
Result CreateCodeMemory(ams::svc::Handle *out, uintptr_t address, size_t size) {
/* Validate address / size. */
R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
R_UNLESS(size > 0, svc::ResultInvalidSize());
R_UNLESS((address < address + size), svc::ResultInvalidCurrentMemory());
/* Create the code memory. */
KCodeMemory *code_mem = KCodeMemory::Create();
R_UNLESS(code_mem != nullptr, svc::ResultOutOfResource());
ON_SCOPE_EXIT { code_mem->Close(); };
/* Verify that the region is in range. */
R_UNLESS(GetCurrentProcess().GetPageTable().Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Initialize the code memory. */
R_TRY(code_mem->Initialize(address, size));
/* Register the code memory. */
R_TRY(KCodeMemory::Register(code_mem));
/* Add the code memory to the handle table. */
R_TRY(GetCurrentProcess().GetHandleTable().Add(out, code_mem));
return ResultSuccess();
}
Result ControlCodeMemory(ams::svc::Handle code_memory_handle, ams::svc::CodeMemoryOperation operation, uint64_t address, uint64_t size, ams::svc::MemoryPermission perm) {
/* Validate the address / size. */
R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
R_UNLESS(size > 0, svc::ResultInvalidSize());
R_UNLESS((address < address + size), svc::ResultInvalidCurrentMemory());
R_UNLESS(address == static_cast<uintptr_t>(address), svc::ResultInvalidCurrentMemory());
R_UNLESS(size == static_cast<size_t>(size), svc::ResultInvalidCurrentMemory());
/* Get the code memory from its handle. */
KScopedAutoObject code_mem = GetCurrentProcess().GetHandleTable().GetObject<KCodeMemory>(code_memory_handle);
R_UNLESS(code_mem.IsNotNull(), svc::ResultInvalidHandle());
/* NOTE: Here, Atmosphere extends the SVC to allow code memory operations on one's own process. */
/* This enables homebrew usage of these SVCs for JIT. */
/* R_UNLESS(code_mem->GetOwner() != GetCurrentProcessPointer(), svc::ResultInvalidHandle()); */
/* Perform the operation. */
switch (operation) {
case ams::svc::CodeMemoryOperation_Map:
{
/* Check that the region is in range. */
R_UNLESS(GetCurrentProcess().GetPageTable().CanContain(address, size, KMemoryState_CodeOut), svc::ResultInvalidMemoryRegion());
/* Check the memory permission. */
R_UNLESS(IsValidMapCodeMemoryPermission(perm), svc::ResultInvalidNewMemoryPermission());
/* Map the memory. */
R_TRY(code_mem->Map(address, size));
}
break;
case ams::svc::CodeMemoryOperation_Unmap:
{
/* Check that the region is in range. */
R_UNLESS(GetCurrentProcess().GetPageTable().CanContain(address, size, KMemoryState_CodeOut), svc::ResultInvalidMemoryRegion());
/* Check the memory permission. */
R_UNLESS(IsValidUnmapCodeMemoryPermission(perm), svc::ResultInvalidNewMemoryPermission());
/* Unmap the memory. */
R_TRY(code_mem->Unmap(address, size));
}
break;
case ams::svc::CodeMemoryOperation_MapToOwner:
{
/* Check that the region is in range. */
R_UNLESS(GetCurrentProcess().GetPageTable().CanContain(address, size, KMemoryState_GeneratedCode), svc::ResultInvalidMemoryRegion());
/* Check the memory permission. */
R_UNLESS(IsValidMapToOwnerCodeMemoryPermission(perm), svc::ResultInvalidNewMemoryPermission());
/* Map the memory to its owner. */
R_TRY(code_mem->MapToOwner(address, size, perm));
}
break;
case ams::svc::CodeMemoryOperation_UnmapFromOwner:
{
/* Check that the region is in range. */
R_UNLESS(GetCurrentProcess().GetPageTable().CanContain(address, size, KMemoryState_GeneratedCode), svc::ResultInvalidMemoryRegion());
/* Check the memory permission. */
R_UNLESS(IsValidUnmapFromOwnerCodeMemoryPermission(perm), svc::ResultInvalidNewMemoryPermission());
/* Unmap the memory from its owner. */
R_TRY(code_mem->UnmapFromOwner(address, size));
}
break;
default:
return svc::ResultInvalidEnumValue();
}
return ResultSuccess();
}
}
/* ============================= 64 ABI ============================= */
Result CreateCodeMemory64(ams::svc::Handle *out_handle, ams::svc::Address address, ams::svc::Size size) {
MESOSPHERE_PANIC("Stubbed SvcCreateCodeMemory64 was called.");
return CreateCodeMemory(out_handle, address, size);
}
Result ControlCodeMemory64(ams::svc::Handle code_memory_handle, ams::svc::CodeMemoryOperation operation, uint64_t address, uint64_t size, ams::svc::MemoryPermission perm) {
MESOSPHERE_PANIC("Stubbed SvcControlCodeMemory64 was called.");
return ControlCodeMemory(code_memory_handle, operation, address, size, perm);
}
/* ============================= 64From32 ABI ============================= */
Result CreateCodeMemory64From32(ams::svc::Handle *out_handle, ams::svc::Address address, ams::svc::Size size) {
MESOSPHERE_PANIC("Stubbed SvcCreateCodeMemory64From32 was called.");
return CreateCodeMemory(out_handle, address, size);
}
Result ControlCodeMemory64From32(ams::svc::Handle code_memory_handle, ams::svc::CodeMemoryOperation operation, uint64_t address, uint64_t size, ams::svc::MemoryPermission perm) {
MESOSPHERE_PANIC("Stubbed SvcControlCodeMemory64From32 was called.");
return ControlCodeMemory(code_memory_handle, operation, address, size, perm);
}
}