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Kernel: Move end_of_kernel_image after the .ksyms section

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Without this we won't be able to detect whether .ksyms overlaps the end
of the page table we set up for the kernel image.
This commit is contained in:
Gunnar Beutner 2021-07-16 09:50:34 +02:00 • committed by Andreas Kling
commit cbdb488578
Notes: sideshowbarker 2024-07-18 08:55:46 +09:00
5 changed files with 38 additions and 5 deletions
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7
Kernel/Arch/x86/common/Interrupts.cpp
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@ -29,6 +29,8 @@ extern FlatPtr start_of_unmap_after_init;
extern FlatPtr end_of_unmap_after_init;
extern FlatPtr start_of_ro_after_init;
extern FlatPtr end_of_ro_after_init;
extern FlatPtr start_of_kernel_ksyms;
extern FlatPtr end_of_kernel_ksyms;
namespace Kernel {
@ -335,6 +337,11 @@ void page_fault_handler(TrapFrame* trap)
PANIC("Attempt to access UNMAP_AFTER_INIT section");
}
if (fault_address >= (FlatPtr)&start_of_kernel_ksyms && fault_address < (FlatPtr)&end_of_kernel_ksyms) {
dump(regs);
PANIC("Attempt to access KSYMS section");
}
PageFault fault { regs.exception_code, VirtualAddress { fault_address } };
auto response = MM.handle_page_fault(fault);