https://git.reactos.org/?p=reactos.git;a=commitdiff;h=9095dbf5a5e877fae5a62554d6a774adf35cb672
commit 9095dbf5a5e877fae5a62554d6a774adf35cb672 Author: Timo Kreuzer <[email protected]> AuthorDate: Sat Feb 10 22:45:45 2018 +0100 Commit: Timo Kreuzer <[email protected]> CommitDate: Sun Nov 1 09:32:27 2020 +0100 [NTOS:MM:X64] Implement MmCreatePageFileMapping and MmDeletePageFileMapping --- ntoskrnl/mm/amd64/page.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 47 insertions(+), 2 deletions(-) diff --git a/ntoskrnl/mm/amd64/page.c b/ntoskrnl/mm/amd64/page.c index 0559de76b88..6b311fb34da 100644 --- a/ntoskrnl/mm/amd64/page.c +++ b/ntoskrnl/mm/amd64/page.c @@ -462,7 +462,23 @@ NTAPI MmDeletePageFileMapping(PEPROCESS Process, PVOID Address, SWAPENTRY* SwapEntry) { - UNIMPLEMENTED; + PMMPTE Pte; + + Pte = MiGetPteForProcess(Process, Address, FALSE); + if (Pte == NULL) + { + *SwapEntry = 0; + return; + } + + if (Pte->u.Trans.Valid || !Pte->u.Trans.Transition) + { + DPRINT1("Pte %x (want not 1 and 0x800)\n", Pte); + KeBugCheck(MEMORY_MANAGEMENT); + } + + *SwapEntry = Pte->u.Long >> 1; + MI_ERASE_PTE(Pte); } NTSTATUS @@ -471,7 +487,36 @@ MmCreatePageFileMapping(PEPROCESS Process, PVOID Address, SWAPENTRY SwapEntry) { - UNIMPLEMENTED; + PMMPTE Pte; + MMPTE PteValue; + + if (Process == NULL && Address < MmSystemRangeStart) + { + DPRINT1("No process\n"); + KeBugCheck(MEMORY_MANAGEMENT); + } + if (Process != NULL && Address >= MmSystemRangeStart) + { + DPRINT1("Setting kernel address with process context\n"); + KeBugCheck(MEMORY_MANAGEMENT); + } + + if (SwapEntry & (1ull << 63)) + { + KeBugCheck(MEMORY_MANAGEMENT); + } + + /* Allocate a PTE */ + Pte = MiGetPteForProcess(Process, Address, TRUE); + if (Pte == NULL) + { + return STATUS_UNSUCCESSFUL; + } + + NT_ASSERT(Pte->u.Long == 0); + PteValue.u.Long = SwapEntry << 1; + MI_WRITE_INVALID_PTE(Pte, PteValue); + return STATUS_UNSUCCESSFUL; }
