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Kernel: Support loading the kernel at almost arbitrary virtual addresses

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This enables further work on implementing KASLR by adding relocation
support to the pre-kernel and updating the kernel to be less dependent
on specific virtual memory layouts.
This commit is contained in:
Gunnar Beutner 2021-07-26 15:10:51 +02:00 • committed by Andreas Kling
parent e3d2ca6bd2
commit 57417a3d6e
20 changed files with 123 additions and 87 deletions
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2
Kernel/VM/MemoryManager.cpp
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@ -954,7 +954,7 @@ RefPtr<PhysicalPage> MemoryManager::allocate_supervisor_physical_page()
return {};
}
fast_u32_fill((u32*)page->paddr().offset(kernel_base).as_ptr(), 0, PAGE_SIZE / sizeof(u32));
fast_u32_fill((u32*)page->paddr().offset(physical_to_virtual_offset).as_ptr(), 0, PAGE_SIZE / sizeof(u32));
++m_system_memory_info.super_physical_pages_used;
return page;
}