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Add NULL checks to InitializeProcessorStructures and reorder TSS allocation
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This commit is contained in:
Aiken Harris
2026-05-14 11:06:00 +02:00
parent 6b852556a5
commit 908bc87b06
2 changed files with 66 additions and 20 deletions
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43
xtoskrnl/ar/amd64/procsup.cc
View File

@@ -439,26 +439,49 @@ AR::ProcSup::InitializeProcessorStructures(IN PVOID ProcessorStructures,
Address = ROUND_UP((UINT_PTR)ProcessorStructures, MM_PAGE_SIZE) + KERNEL_STACK_SIZE;
/* Assign a space for kernel boot stack and advance */
*KernelBootStack = (PVOID)Address;
if(KernelBootStack != NULLPTR)
{
/* Return kernel boot stack address */
*KernelBootStack = (PVOID)Address;
}
Address += KERNEL_STACK_SIZE;
/* Assign a space for kernel fault stack and advance */
*KernelFaultStack = (PVOID)Address;
if(KernelFaultStack != NULLPTR)
{
/* Return kernel fault stack address */
*KernelFaultStack = (PVOID)Address;
}
Address += KERNEL_STACK_SIZE;
/* Assign a space for kernel NMI stack, no advance needed as stack grows down */
*KernelNmiStack = (PVOID)Address;
if(KernelNmiStack != NULLPTR)
{
/* Return kernel NMI stack address */
*KernelNmiStack = (PVOID)Address;
}
/* Assign a space for GDT and advance */
*Gdt = (PKGDTENTRY)(PVOID)Address;
Address += sizeof(InitialGdt);
if(Gdt != NULLPTR)
{
/* Return GDT base address */
*Gdt = (PKGDTENTRY)(PVOID)Address;
}
Address += (GDT_ENTRIES * sizeof(KGDTENTRY));
/* Assign a space for TSS and advance */
if(Tss != NULLPTR)
{
*Tss = (PKTSS)(PVOID)Address;
}
Address += sizeof(KTSS);
/* Assign a space for Processor Block and advance */
*ProcessorBlock = (PKPROCESSOR_BLOCK)(PVOID)Address;
Address += sizeof(InitialProcessorBlock);
/* Assign a space for TSS */
*Tss = (PKTSS)(PVOID)Address;
if(ProcessorBlock != NULLPTR)
{
/* Return processor block address */
*ProcessorBlock = (PKPROCESSOR_BLOCK)(PVOID)Address;
}
}
/**

43
xtoskrnl/ar/i686/procsup.cc
View File

@@ -391,26 +391,49 @@ AR::ProcSup::InitializeProcessorStructures(IN PVOID ProcessorStructures,
Address = ROUND_UP((UINT_PTR)ProcessorStructures, MM_PAGE_SIZE) + KERNEL_STACK_SIZE;
/* Assign a space for kernel boot stack and advance */
*KernelBootStack = (PVOID)Address;
if(KernelBootStack != NULLPTR)
{
/* Return kernel boot stack address */
*KernelBootStack = (PVOID)Address;
}
Address += KERNEL_STACK_SIZE;
/* Assign a space for kernel fault stack and advance */
*KernelFaultStack = (PVOID)Address;
if(KernelFaultStack != NULLPTR)
{
/* Return kernel fault stack address */
*KernelFaultStack = (PVOID)Address;
}
Address += KERNEL_STACK_SIZE;
/* Assign a space for kernel NMI stack, no advance needed as stack grows down */
*KernelNmiStack = (PVOID)Address;
if(KernelNmiStack != NULLPTR)
{
/* Return kernel NMI stack address */
*KernelNmiStack = (PVOID)Address;
}
/* Assign a space for GDT and advance */
*Gdt = (PKGDTENTRY)(PVOID)Address;
Address += sizeof(InitialGdt);
if(Gdt != NULLPTR)
{
/* Return GDT base address */
*Gdt = (PKGDTENTRY)(PVOID)Address;
}
Address += (GDT_ENTRIES * sizeof(KGDTENTRY));
/* Assign a space for TSS and advance */
if(Tss != NULLPTR)
{
*Tss = (PKTSS)(PVOID)Address;
}
Address += sizeof(KTSS);
/* Assign a space for Processor Block and advance */
*ProcessorBlock = (PKPROCESSOR_BLOCK)(PVOID)Address;
Address += sizeof(InitialProcessorBlock);
/* Assign a space for TSS */
*Tss = (PKTSS)(PVOID)Address;
if(ProcessorBlock != NULLPTR)
{
/* Return processor block address */
*ProcessorBlock = (PKPROCESSOR_BLOCK)(PVOID)Address;
}
}
/**