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Added implementation of critical thread/process

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This commit is contained in:
Alex 2022-11-06 03:43:12 +02:00
parent 954223cbf5
commit 3d947c2a03
Signed by untrusted user who does not match committer: enderice2
GPG Key ID: EACC3AD603BAB4DD
4 changed files with 17 additions and 4 deletions
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5
Core/CrashHandler.cpp
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@ -117,9 +117,14 @@ namespace CrashHandler
else
{
debug("Exception in user mode");
if (!GetCurrentCPU()->CurrentThread->Security.IsCritical)
{
UserModeExceptionHandler(Frame);
return;
}
else
EHPrint("\eFF0000Init process crashed!");
}
debug("Reading control registers...");
CPU::x64::CR0 cr0 = CPU::x64::readcr0();

1
KThread.cpp
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@ -81,6 +81,7 @@ void KernelMainThread()
// TODO: Untested!
Execute::SpawnData ret = Execute::Spawn(Config.InitPath, argc, (uint64_t)argv.data());
ret.Thread->SetCritical(true);
if (ret.Status != Execute::ExStatus::OK)
{
KPrint("\eE85230Failed to start %s! Code: %d", Config.InitPath, ret);

4
Tasking/Task.cpp
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@ -624,12 +624,12 @@ namespace Tasking
Thread->Registers.rsp = ((uint64_t)Thread->Stack + STACK_SIZE);
/* We need to leave the libc's crt to make a syscall when the Thread is exited or we are going to get GPF or PF exception. */
for (uint64_t i = 0; i < TO_PAGES(STACK_SIZE); i++)
Memory::Virtual(Parent->PageTable).Map((void *)((uint64_t)Thread->Stack + (i * PAGE_SIZE)), (void *)((uint64_t)Thread->Stack + (i * PAGE_SIZE)), Memory::PTFlag::US);
Memory::Virtual(Parent->PageTable).Map((void *)((uint64_t)Thread->Stack + (i * PAGE_SIZE)), (void *)((uint64_t)Thread->Stack + (i * PAGE_SIZE)), Memory::PTFlag::RW | Memory::PTFlag::US);
if (!Memory::Virtual(Parent->PageTable).Check((void *)Offset, Memory::PTFlag::US))
{
error("Offset is not user accessible");
Memory::Virtual(Parent->PageTable).Map((void *)Offset, (void *)Offset, Memory::PTFlag::RW | Memory::PTFlag::US);
Memory::Virtual(Parent->PageTable).Map((void *)Offset, (void *)Offset, Memory::PTFlag::RW | Memory::PTFlag::US); // We try one more time.
}
#elif defined(__i386__)
#elif defined(__aarch64__)

7
include/task.hpp
View File

@ -60,6 +60,7 @@ namespace Tasking
{
TaskTrustLevel TrustLevel;
Token UniqueToken;
bool IsCritical;
};
struct TaskInfo
@ -117,6 +118,12 @@ namespace Tasking
}
int GetExitCode() { return ExitCode; }
void SetCritical(bool critical)
{
trace("Setting criticality of thread %s to %s", Name, critical ? "true" : "false");
Security.IsCritical = critical;
}
};
struct PCB