SpookyDervish/SplenkOS
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lock kernel pages

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SpookyDervish
2026-01-28 18:31:58 +11:00
parent 012489a658
commit 3b8bd6f0da
6 changed files with 13 additions and 20 deletions
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OVMFbin/OVMF_VARS-pure-efi.fd
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kernel/bin/CustomOS.img
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kernel/bin/kernel.elf
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2
kernel/kernel.ld
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@@ -3,6 +3,7 @@ ENTRY(_start)
SECTIONS SECTIONS
{ {
_KernelStart = .;
.text : ALIGN(0x1000) .text : ALIGN(0x1000)
{ {
*(.text) *(.text)
@@ -20,4 +21,5 @@ SECTIONS
*(COMMON) *(COMMON)
*(.bss) *(.bss)
} }
_KernelEnd = .;
} }

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kernel/lib/kernel.o
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31
kernel/src/kernel.cpp
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@@ -20,7 +20,10 @@ struct BootInfo {
extern "C" void __stack_chk_fail(void) { extern "C" void __stack_chk_fail(void) {
return; return;
} }
uint8_t testBuffer[20];
extern uint64_t _KernelStart;
extern uint64_t _KernelEnd;
extern "C" void _start(BootInfo* bootInfo) { extern "C" void _start(BootInfo* bootInfo) {
BasicRenderer newRenderer = BasicRenderer(bootInfo->framebuffer, bootInfo->psf1_Font); BasicRenderer newRenderer = BasicRenderer(bootInfo->framebuffer, bootInfo->psf1_Font);
@@ -31,6 +34,13 @@ extern "C" void _start(BootInfo* bootInfo) {
PageFrameAllocator newAllocator; PageFrameAllocator newAllocator;
newAllocator.ReadEFIMemoryMap(bootInfo->mMap, bootInfo->mMapSize, bootInfo->mMapDescriptorSize); newAllocator.ReadEFIMemoryMap(bootInfo->mMap, bootInfo->mMapSize, bootInfo->mMapDescriptorSize);
// ensure we don't absolutely fuck shit up
uint64_t kernelSize = (uint64_t)&_KernelEnd - (uint64_t)&_KernelStart;
uint64_t kernelPages = (uint64_t)kernelSize / 4096 + 1;
newAllocator.LockPages(&_KernelStart, kernelPages);
// print out ram info
newRenderer.Print(0xFFFFFFFF, "Free RAM: "); newRenderer.Print(0xFFFFFFFF, "Free RAM: ");
newRenderer.Print(0xFF00FFFF, to_string(newAllocator.GetFreeRAM() / 1024)); newRenderer.Print(0xFF00FFFF, to_string(newAllocator.GetFreeRAM() / 1024));
newRenderer.Print(0xFF00FFFF, " KB"); newRenderer.Print(0xFF00FFFF, " KB");
@@ -44,24 +54,5 @@ extern "C" void _start(BootInfo* bootInfo) {
newRenderer.Print(0xFF00FFFF, " KB"); newRenderer.Print(0xFF00FFFF, " KB");
newRenderer.cursorPosition = {0, newRenderer.cursorPosition.y + 18}; newRenderer.cursorPosition = {0, newRenderer.cursorPosition.y + 18};
for (int t = 0; t < 20; t++) {
void* address = newAllocator.RequestPage();
newRenderer.Print(0xFFFFFFFF, "0x");
newRenderer.Print(0xFFFFFFFF, to_hstring((uint64_t)address));
newRenderer.cursorPosition = {0, newRenderer.cursorPosition.y + 18};
}
//newRenderer.Print(0xFFFFFFFF, to_string(GetMemorySize(bootInfo->mMap, mMapEntries, bootInfo ->mMapDescriptorSize)));
// for (int i = 0; i < mMapEntries; i++) {
// EFI_MEMORY_DESCRIPTOR* desc = (EFI_MEMORY_DESCRIPTOR*)((uint64_t)bootInfo ->mMap (i * bootinfo->mMapDescriptorSize));
// newRenderer.Print(0xFFFFFFFF, EFI_MEMORY_TYPE_STRINGS[desc->type]);
// newRenderer.Print(0xFFFFFFFF, " ");
// newRenderer.Print(0xFFFF00FF, to_string(desc->numPages * 4096 / 1024));
// newRenderer.Print(0xFFFF00FF, " KB");
// newRenderer.cursorPosition = {0, newRenderer.cursorPosition.y + 18};
// }
return; return;
} }