xt-sys/exectos
xt-sys/exectos
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Take care about blink first, otherwise BlPhysicalListToVirtual() fails to properly map single-element linked list
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This commit is contained in:
Rafal Kupiec 2024-05-16 22:17:40 +02:00
parent f74a5521ba
commit 058649036f
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
1 changed files with 11 additions and 11 deletions
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22
xtldr/memory.c
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@ -659,16 +659,6 @@ BlPhysicalListToVirtual(IN PXTBL_PAGE_MAPPING PageMap,
NextEntry = ListEntry->Flink;
/* Convert the address of this element to VirtualAddress */
if(ListEntry->Flink == ListHead)
{
/* Convert list head */
ListEntry->Flink = ListHead->Flink->Blink;
}
else
{
/* Convert list entry */
ListEntry->Flink = BlPhysicalAddressToVirtual(ListEntry->Flink, (PVOID)PhysicalBase, VirtualBase);
}
if(ListEntry->Blink == ListHead)
{
/* Find virtual address of list head */
@ -679,14 +669,24 @@ BlPhysicalListToVirtual(IN PXTBL_PAGE_MAPPING PageMap,
/* Convert list entry */
ListEntry->Blink = BlPhysicalAddressToVirtual(ListEntry->Blink, (PVOID)PhysicalBase, VirtualBase);
}
if(ListEntry->Flink == ListHead)
{
/* Convert list head */
ListEntry->Flink = ListHead->Flink->Blink;
}
else
{
/* Convert list entry */
ListEntry->Flink = BlPhysicalAddressToVirtual(ListEntry->Flink, (PVOID)PhysicalBase, VirtualBase);
}
/* Get to the next element*/
ListEntry = NextEntry;
}
/* Convert list head */
ListHead->Flink = BlPhysicalAddressToVirtual(ListHead->Flink, (PVOID)PhysicalBase, VirtualBase);
ListHead->Blink = BlPhysicalAddressToVirtual(ListHead->Blink, (PVOID)PhysicalBase, VirtualBase);
ListHead->Flink = BlPhysicalAddressToVirtual(ListHead->Flink, (PVOID)PhysicalBase, VirtualBase);
/* Return success */
return STATUS_EFI_SUCCESS;