xt-sys/exectos
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Let kernel initialize stack on it's own without relying on boot loader
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This commit is contained in:
Rafal Kupiec
2023-02-05 09:55:59 +01:00
parent 0b743a5f26
commit d6aac59199
10 changed files with 38 additions and 60 deletions
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6
xtoskrnl/ar/amd64/globals.c
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@@ -20,3 +20,9 @@ KPROCESSOR_BLOCK ArInitialProcessorBlock;
/* Initial TSS */
KTSS ArInitialTss;
/* Initial kernel boot stack */
UCHAR ArKernelBootStack[KERNEL_STACK_SIZE] = {0};
/* Initial kernel fault stack */
UCHAR ArKernelFaultStack[KERNEL_STACK_SIZE] = {0};

10
xtoskrnl/ar/amd64/procsup.c
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@@ -22,6 +22,7 @@ ArInitializeProcessor(VOID)
{
KDESCRIPTOR GdtDescriptor, IdtDescriptor;
PKPROCESSOR_BLOCK ProcessorBlock;
PVOID KernelFaultStack;
PKGDTENTRY Gdt;
PKIDTENTRY Idt;
PKTSS Tss;
@@ -30,12 +31,13 @@ ArInitializeProcessor(VOID)
Gdt = ArInitialGdt;
Idt = ArInitialIdt;
Tss = &ArInitialTss;
KernelFaultStack = &ArKernelFaultStack;
/* Load processor block */
ProcessorBlock = CONTAIN_RECORD(&ArInitialProcessorBlock.Prcb, KPROCESSOR_BLOCK, Prcb);
/* Initialize processor block */
ArpInitializeProcessorBlock(ProcessorBlock, Gdt, Idt, Tss, (PVOID)KeInitializationBlock->KernelFaultStack);
ArpInitializeProcessorBlock(ProcessorBlock, Gdt, Idt, Tss, KernelFaultStack);
/* Initialize GDT, IDT and TSS */
ArpInitializeGdt(ProcessorBlock);
@@ -314,9 +316,9 @@ ArpInitializeTss(IN PKPROCESSOR_BLOCK ProcessorBlock)
/* Setup I/O map and stacks for ring0 & traps */
ProcessorBlock->TssBase->IoMapBase = sizeof(KTSS);
ProcessorBlock->TssBase->Rsp0 = KeInitializationBlock->KernelBootStack;
ProcessorBlock->TssBase->Ist[KIDT_IST_PANIC] = KeInitializationBlock->KernelFaultStack;
ProcessorBlock->TssBase->Ist[KIDT_IST_MCA] = KeInitializationBlock->KernelFaultStack;
ProcessorBlock->TssBase->Rsp0 = (ULONG_PTR)&ArKernelBootStack;
ProcessorBlock->TssBase->Ist[KIDT_IST_PANIC] = (ULONG_PTR)&ArKernelFaultStack;
ProcessorBlock->TssBase->Ist[KIDT_IST_MCA] = (ULONG_PTR)&ArKernelFaultStack;
}
/**