RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 03:57:43 +00:00
Code Issues Activity Actions

Kernel: Move kernel region checks from x86 page fault handler to MM

Browse source 
Ideally the x86 fault handler would only do x86 specific things and
delegate the rest of the work to MemoryManager. This patch moves some of
the address checks to a more generic place.
This commit is contained in:
Andreas Kling 2022-01-28 15:04:34 +01:00
parent 5092813a45
commit a12e19c015
2 changed files with 17 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

16
Kernel/Arch/x86/common/Interrupts.cpp
View file

@ -327,22 +327,6 @@ void page_fault_handler(TrapFrame* trap)
return handle_crash(regs, "Bad stack on page fault", SIGSEGV);
}
if (fault_address >= (FlatPtr)&start_of_ro_after_init && fault_address < (FlatPtr)&end_of_ro_after_init) {
dump(regs);
PANIC("Attempt to write into READONLY_AFTER_INIT section");
}
if (fault_address >= (FlatPtr)&start_of_unmap_after_init && fault_address < (FlatPtr)&end_of_unmap_after_init) {
dump(regs);
auto sym = symbolicate_kernel_address(fault_address);
PANIC("Attempt to access UNMAP_AFTER_INIT section ({:p}: {})", fault_address, sym ? sym->name : "(Unknown)");
}
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);