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Kernel: Dump registers and code on ring0 page fault.

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This commit is contained in:
Andreas Kling 2019-01-25 00:32:44 +01:00
parent b896d4b237
commit e28de4ad5e
1 changed files with 8 additions and 7 deletions
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15
Kernel/i386.cpp
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@ -211,7 +211,7 @@ void exception_14_handler(RegisterDumpWithExceptionCode& regs)
esp = regs.esp_if_crossRing; esp = regs.esp_if_crossRing;
} }
#ifdef PAGE_FAULT_DEBUG auto dump_registers_and_code = [&] {
dbgprintf("exception code: %w\n", regs.exception_code); dbgprintf("exception code: %w\n", regs.exception_code);
dbgprintf("pc=%w:%x ds=%w es=%w fs=%w gs=%w\n", regs.cs, regs.eip, regs.ds, regs.es, regs.fs, regs.gs); dbgprintf("pc=%w:%x ds=%w es=%w fs=%w gs=%w\n", regs.cs, regs.eip, regs.ds, regs.es, regs.fs, regs.gs);
dbgprintf("stk=%w:%x\n", ss, esp); dbgprintf("stk=%w:%x\n", ss, esp);
@ -229,13 +229,18 @@ void exception_14_handler(RegisterDumpWithExceptionCode& regs)
codeptr[6], codeptr[6],
codeptr[7] codeptr[7]
); );
#endif };
if (current->isRing0()) { if (current->isRing0()) {
dump_registers_and_code();
current->dumpRegions(); current->dumpRegions();
HANG; HANG;
} }
#ifdef PAGE_FAULT_DEBUG
dump_registers_and_code();
#endif
auto response = MM.handle_page_fault(PageFault(regs.exception_code, LinearAddress(faultAddress))); auto response = MM.handle_page_fault(PageFault(regs.exception_code, LinearAddress(faultAddress)));
if (response == PageFaultResponse::ShouldCrash) { if (response == PageFaultResponse::ShouldCrash) {
@ -245,11 +250,7 @@ void exception_14_handler(RegisterDumpWithExceptionCode& regs)
regs.exception_code & 2 ? "write" : "read", regs.exception_code & 2 ? "write" : "read",
faultAddress); faultAddress);
kprintf("exception code: %w\n", regs.exception_code); dump_registers_and_code();
kprintf("pc=%w:%x ds=%w es=%w fs=%w gs=%w\n", regs.cs, regs.eip, regs.ds, regs.es, regs.fs, regs.gs);
kprintf("stk=%w:%x\n", ss, esp);
kprintf("eax=%x ebx=%x ecx=%x edx=%x\n", regs.eax, regs.ebx, regs.ecx, regs.edx);
kprintf("ebp=%x esp=%x esi=%x edi=%x\n", regs.ebp, esp, regs.esi, regs.edi);
current->crash(); current->crash();
} else if (response == PageFaultResponse::Continue) { } else if (response == PageFaultResponse::Continue) {
#ifdef PAGE_FAULT_DEBUG #ifdef PAGE_FAULT_DEBUG