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Kernel: Use the whole kernel PD range when randomizing the KASLR offset

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Now that we reclaim the memory range that is created by KASLR before
the start of the kernel image, there's no need to be conservative with
the KASLR offset.
This commit is contained in:
Idan Horowitz 2022-03-22 19:10:17 +02:00 • committed by Idan Horowitz
parent e0c7727934
commit f0166efe8c
6 changed files with 5 additions and 8 deletions
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2
Kernel/init.cpp
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@ -117,7 +117,6 @@ READONLY_AFTER_INIT PhysicalAddress start_of_prekernel_image;
READONLY_AFTER_INIT PhysicalAddress end_of_prekernel_image;
READONLY_AFTER_INIT size_t physical_to_virtual_offset;
READONLY_AFTER_INIT FlatPtr kernel_mapping_base;
READONLY_AFTER_INIT FlatPtr default_kernel_load_base;
READONLY_AFTER_INIT FlatPtr kernel_load_base;
#if ARCH(X86_64)
READONLY_AFTER_INIT PhysicalAddress boot_pml4t;
@ -150,7 +149,6 @@ extern "C" [[noreturn]] UNMAP_AFTER_INIT void init(BootInfo const& boot_info)
end_of_prekernel_image = PhysicalAddress { boot_info.end_of_prekernel_image };
physical_to_virtual_offset = boot_info.physical_to_virtual_offset;
kernel_mapping_base = boot_info.kernel_mapping_base;
default_kernel_load_base = boot_info.default_kernel_load_base;
kernel_load_base = boot_info.kernel_load_base;
#if ARCH(X86_64)
gdt64ptr = boot_info.gdt64ptr;