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Stack guard implementation

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This commit is contained in:
Alex
2022-11-21 03:20:13 +02:00
parent 1afe255fed
commit eaaf8427dc
7 changed files with 171 additions and 43 deletions
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15
Core/Crash/UserHandler.cpp
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@ -30,7 +30,8 @@ __no_stack_protector void UserModeExceptionHandler(CHArchTrapFrame *Frame)
CriticalSection cs;
debug("Interrupts? %s.", cs.IsInterruptsEnabled() ? "Yes" : "No");
fixme("Handling user mode exception");
TaskManager->GetCurrentThread()->Status = Tasking::TaskStatus::Terminated;
TaskManager->GetCurrentThread()->Status = Tasking::TaskStatus::Stopped;
CPUData *CurCPU = GetCurrentCPU();
{
CPU::x64::CR0 cr0 = CPU::x64::readcr0();
@ -41,7 +42,7 @@ __no_stack_protector void UserModeExceptionHandler(CHArchTrapFrame *Frame)
CPU::x64::EFER efer;
efer.raw = CPU::x64::rdmsr(CPU::x64::MSR_EFER);
error("Technical Informations on CPU %lld:", GetCurrentCPU()->ID);
error("Technical Informations on CPU %lld:", CurCPU->ID);
#if defined(__amd64__)
uint64_t ds;
asmv("mov %%ds, %0"
@ -176,6 +177,13 @@ __no_stack_protector void UserModeExceptionHandler(CHArchTrapFrame *Frame)
}
case CPU::x64::PageFault:
{
if (CurCPU)
if (CurCPU->CurrentThread->Stack->Expand(CPU::x64::readcr2().raw))
{
debug("Stack expanded");
return;
}
CPU::x64::PageFaultErrorCode params = {.raw = (uint32_t)Frame->ErrorCode};
#if defined(__amd64__)
error("An exception occurred at %#lx by %#lx", CPU::x64::readcr2().PFLA, Frame->rip);
@ -226,6 +234,9 @@ __no_stack_protector void UserModeExceptionHandler(CHArchTrapFrame *Frame)
break;
}
}
TaskManager->GetCurrentThread()->Status = Tasking::TaskStatus::Terminated;
__sync_synchronize();
error("End of report.");
CPU::Interrupts(CPU::Enable);
debug("Interrupts enabled back.");