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Kernel: Interpret "reserved bit violation" page faults correctly

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We don't actually react to these in any meaningful way other than
crashing, but let's at least print the correct information. :^)
This commit is contained in:
Andreas Kling 2019-12-25 11:34:07 +01:00
parent 52deb09382
commit c22a4301ed
2 changed files with 4 additions and 2 deletions
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3
Kernel/Arch/i386/CPU.cpp
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@ -279,10 +279,11 @@ void page_fault_handler(RegisterDump regs)
return; return;
} }
kprintf("\033[31;1m%s(%u:%u) Unrecoverable page fault, %s%s address %p\033[0m\n", kprintf("\033[31;1m%s(%u:%u) Unrecoverable page fault, %s%s%s address %p\033[0m\n",
current->process().name().characters(), current->process().name().characters(),
current->pid(), current->pid(),
current->tid(), current->tid(),
regs.exception_code & PageFaultFlags::ReservedBitViolation ? "reserved bit violation / " : "",
regs.exception_code & PageFaultFlags::InstructionFetch ? "instruction fetch / " : "", regs.exception_code & PageFaultFlags::InstructionFetch ? "instruction fetch / " : "",
regs.exception_code & PageFaultFlags::Write ? "write to" : "read from", regs.exception_code & PageFaultFlags::Write ? "write to" : "read from",
fault_address); fault_address);

3
Kernel/Arch/i386/CPU.h
View file

@ -348,7 +348,8 @@ struct PageFaultFlags {
Write = 0x02, Write = 0x02,
UserMode = 0x04, UserMode = 0x04,
SupervisorMode = 0x00, SupervisorMode = 0x00,
InstructionFetch = 0x08, ReservedBitViolation = 0x08,
InstructionFetch = 0x10,
}; };
}; };