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kern: Add special-case for InvalidateProcessDataCache on current process

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Michael Scire 2023-10-11 09:37:45 -07:00 committed by SciresM
parent 2a4d68f916
commit 3737151a2f
4 changed files with 27 additions and 1 deletions
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4
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_process_page_table.hpp
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@ -150,6 +150,10 @@ namespace ams::kern::arch::arm64 {
R_RETURN(m_page_table.InvalidateProcessDataCache(address, size));
}
Result InvalidateCurrentProcessDataCache(KProcessAddress address, size_t size) {
R_RETURN(m_page_table.InvalidateCurrentProcessDataCache(address, size));
}
Result ReadDebugMemory(void *buffer, KProcessAddress address, size_t size) {
R_RETURN(m_page_table.ReadDebugMemory(buffer, address, size));
}

1
libraries/libmesosphere/include/mesosphere/kern_k_page_table_base.hpp
View file

@ -412,6 +412,7 @@ namespace ams::kern {
Result MakeAndOpenPageGroup(KPageGroup *out, KProcessAddress address, size_t num_pages, u32 state_mask, u32 state, u32 perm_mask, u32 perm, u32 attr_mask, u32 attr);
Result InvalidateProcessDataCache(KProcessAddress address, size_t size);
Result InvalidateCurrentProcessDataCache(KProcessAddress address, size_t size);
Result ReadDebugMemory(void *buffer, KProcessAddress address, size_t size);
Result ReadDebugIoMemory(void *buffer, KProcessAddress address, size_t size, KMemoryState state);

17
libraries/libmesosphere/source/kern_k_page_table_base.cpp
View file

@ -2508,6 +2508,23 @@ namespace ams::kern {
R_SUCCEED();
}
Result KPageTableBase::InvalidateCurrentProcessDataCache(KProcessAddress address, size_t size) {
/* Check pre-condition: this is being called on the current process. */
MESOSPHERE_ASSERT(this == std::addressof(GetCurrentProcess().GetPageTable().GetBasePageTable()));
/* Check that the region is in range. */
R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());
/* Lock the table. */
KScopedLightLock lk(m_general_lock);
/* Check the memory state. */
R_TRY(this->CheckMemoryStateContiguous(address, size, KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted, KMemoryPermission_UserReadWrite, KMemoryPermission_UserReadWrite, KMemoryAttribute_Uncached, KMemoryAttribute_None));
/* Invalidate the data cache. */
R_RETURN(cpu::InvalidateDataCache(GetVoidPointer(address), size));
}
Result KPageTableBase::ReadDebugMemory(void *buffer, KProcessAddress address, size_t size) {
/* Lightly validate the region is in range. */
R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());

6
libraries/libmesosphere/source/svc/kern_svc_cache.cpp
View file

@ -102,7 +102,11 @@ namespace ams::kern::svc {
R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
/* Invalidate the cache. */
R_TRY(process->GetPageTable().InvalidateProcessDataCache(address, size));
if (process.GetPointerUnsafe() == GetCurrentProcessPointer()) {
R_TRY(process->GetPageTable().InvalidateCurrentProcessDataCache(address, size));
} else {
R_TRY(process->GetPageTable().InvalidateProcessDataCache(address, size));
}
R_SUCCEED();
}