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kern: Add special-case for InvalidateProcessDataCache on current process
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2a4d68f916
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3737151a2f
4 changed files with 27 additions and 1 deletions
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@ -150,6 +150,10 @@ namespace ams::kern::arch::arm64 {
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R_RETURN(m_page_table.InvalidateProcessDataCache(address, size));
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}
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Result InvalidateCurrentProcessDataCache(KProcessAddress address, size_t size) {
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R_RETURN(m_page_table.InvalidateCurrentProcessDataCache(address, size));
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}
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Result ReadDebugMemory(void *buffer, KProcessAddress address, size_t size) {
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R_RETURN(m_page_table.ReadDebugMemory(buffer, address, size));
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}
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@ -412,6 +412,7 @@ namespace ams::kern {
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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);
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Result InvalidateProcessDataCache(KProcessAddress address, size_t size);
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Result InvalidateCurrentProcessDataCache(KProcessAddress address, size_t size);
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Result ReadDebugMemory(void *buffer, KProcessAddress address, size_t size);
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Result ReadDebugIoMemory(void *buffer, KProcessAddress address, size_t size, KMemoryState state);
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@ -2508,6 +2508,23 @@ namespace ams::kern {
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R_SUCCEED();
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}
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Result KPageTableBase::InvalidateCurrentProcessDataCache(KProcessAddress address, size_t size) {
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/* Check pre-condition: this is being called on the current process. */
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MESOSPHERE_ASSERT(this == std::addressof(GetCurrentProcess().GetPageTable().GetBasePageTable()));
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/* Check that the region is in range. */
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R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());
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/* Lock the table. */
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KScopedLightLock lk(m_general_lock);
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/* Check the memory state. */
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R_TRY(this->CheckMemoryStateContiguous(address, size, KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted, KMemoryPermission_UserReadWrite, KMemoryPermission_UserReadWrite, KMemoryAttribute_Uncached, KMemoryAttribute_None));
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/* Invalidate the data cache. */
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R_RETURN(cpu::InvalidateDataCache(GetVoidPointer(address), size));
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}
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Result KPageTableBase::ReadDebugMemory(void *buffer, KProcessAddress address, size_t size) {
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/* Lightly validate the region is in range. */
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R_UNLESS(this->Contains(address, size), svc::ResultInvalidCurrentMemory());
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@ -102,7 +102,11 @@ namespace ams::kern::svc {
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R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
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/* Invalidate the cache. */
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R_TRY(process->GetPageTable().InvalidateProcessDataCache(address, size));
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if (process.GetPointerUnsafe() == GetCurrentProcessPointer()) {
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R_TRY(process->GetPageTable().InvalidateCurrentProcessDataCache(address, size));
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} else {
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R_TRY(process->GetPageTable().InvalidateProcessDataCache(address, size));
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}
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R_SUCCEED();
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}
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