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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal EL Mahrouss, all rights reserved.
------------------------------------------- */
#include <ArchKit/ArchKit.h>
#include <KernelKit/UserProcessScheduler.h>
#include <NewKit/KString.h>
#include <POSIXKit/Signals.h>
STATIC BOOL kIsScheduling = NO;
/// @brief Handle GPF fault.
/// @param rsp
EXTERN_C void idt_handle_gpf(Kernel::UIntPtr rsp)
{
auto process = Kernel::UserProcessScheduler::The().CurrentProcess();
if (process.Leak().Status != Kernel::ProcessStatusKind::kRunning)
return;
kIsScheduling = NO;
kout << "Kernel: General Protection Fault.\r";
process.Leak().ProcessSignal.SignalArg = rsp;
process.Leak().ProcessSignal.SignalID = SIGKILL;
process.Leak().ProcessSignal.PreviousStatus = process.Leak().Status;
kout << "Kernel: SIGKILL status.\r";
process.Leak().Status = Kernel::ProcessStatusKind::kKilled;
process.Leak().Crash();
}
/// @brief Handle page fault.
/// @param rsp
EXTERN_C void idt_handle_pf(Kernel::UIntPtr rsp)
{
auto process = Kernel::UserProcessScheduler::The().CurrentProcess();
if (process.Leak().Status != Kernel::ProcessStatusKind::kRunning)
return;
kIsScheduling = NO;
kout << "Kernel: Page Fault.\r";
kout << "Kernel: SIGKILL\r";
process.Leak().ProcessSignal.SignalArg = rsp;
process.Leak().ProcessSignal.SignalID = SIGKILL;
process.Leak().ProcessSignal.PreviousStatus = process.Leak().Status;
process.Leak().Status = Kernel::ProcessStatusKind::kKilled;
process.Leak().Crash();
}
/// @brief Handle scheduler interrupt.
EXTERN_C void idt_handle_scheduler(Kernel::UIntPtr rsp)
{
static Kernel::Int64 try_count_before_brute = 100000UL;
while (kIsScheduling)
{
--try_count_before_brute;
if (try_count_before_brute < 1)
break;
}
try_count_before_brute = 100000UL;
kIsScheduling = YES;
kout << "Kernel: Timer IRQ (Scheduler Notification).\r";
Kernel::UserProcessHelper::StartScheduling();
kIsScheduling = NO;
}
/// @brief Handle math fault.
/// @param rsp
EXTERN_C void idt_handle_math(Kernel::UIntPtr rsp)
{
auto process = Kernel::UserProcessScheduler::The().CurrentProcess();
if (process.Leak().Status != Kernel::ProcessStatusKind::kRunning)
return;
kIsScheduling = NO;
kout << "Kernel: Math error (division by zero?).\r";
process.Leak().ProcessSignal.SignalArg = rsp;
process.Leak().ProcessSignal.SignalID = SIGKILL;
process.Leak().ProcessSignal.PreviousStatus = process.Leak().Status;
kout << "Kernel: SIGKILL status.\r";
process.Leak().Status = Kernel::ProcessStatusKind::kKilled;
process.Leak().Crash();
}
/// @brief Handle any generic fault.
/// @param rsp
EXTERN_C void idt_handle_generic(Kernel::UIntPtr rsp)
{
auto process = Kernel::UserProcessScheduler::The().CurrentProcess();
if (process.Leak().Status != Kernel::ProcessStatusKind::kRunning)
return;
kIsScheduling = NO;
kout << "Kernel: Generic Process Fault.\r";
process.Leak().ProcessSignal.SignalArg = rsp;
process.Leak().ProcessSignal.SignalID = SIGKILL;
process.Leak().ProcessSignal.PreviousStatus = process.Leak().Status;
kout << "Kernel: SIGKILL status.\r";
process.Leak().Status = Kernel::ProcessStatusKind::kKilled;
process.Leak().Crash();
}
EXTERN_C Kernel::Void idt_handle_breakpoint(Kernel::UIntPtr rip)
{
auto process = Kernel::UserProcessScheduler::The().CurrentProcess();
if (process.Leak().Status != Kernel::ProcessStatusKind::kRunning)
return;
kIsScheduling = NO;
kout << "Kernel: Process RIP: " << Kernel::hex_number(rip) << endl;
kout << "Kernel: SIGTRAP\r";
process.Leak().ProcessSignal.SignalArg = rip;
process.Leak().ProcessSignal.SignalID = SIGTRAP;
process.Leak().ProcessSignal.PreviousStatus = process.Leak().Status;
kout << "Kernel: SIGKILL status.\r";
process.Leak().Status = Kernel::ProcessStatusKind::kFrozen;
}
/// @brief Handle #UD fault.
/// @param rsp
EXTERN_C void idt_handle_ud(Kernel::UIntPtr rsp)
{
auto process = Kernel::UserProcessScheduler::The().CurrentProcess();
if (process.Leak().Status != Kernel::ProcessStatusKind::kRunning)
return;
kIsScheduling = NO;
kout << "Kernel: Undefined Opcode.\r";
process.Leak().ProcessSignal.SignalArg = rsp;
process.Leak().ProcessSignal.SignalID = SIGKILL;
process.Leak().ProcessSignal.PreviousStatus = process.Leak().Status;
kout << "Kernel: SIGKILL status.\r";
process.Leak().Status = Kernel::ProcessStatusKind::kKilled;
process.Leak().Crash();
}
/// @brief Enter syscall from assembly.
/// @param stack the stack pushed from assembly routine.
/// @return nothing.
EXTERN_C Kernel::Void hal_system_call_enter(Kernel::UIntPtr rcx_syscall_index, Kernel::UIntPtr rdx_syscall_struct)
{
if (rcx_syscall_index < kSyscalls.Count())
{
kout << "syscall: Enter Syscall.\r";
if (kSyscalls[rcx_syscall_index].fHooked)
{
if (kSyscalls[rcx_syscall_index].fProc)
{
(kSyscalls[rcx_syscall_index].fProc)((Kernel::VoidPtr)rdx_syscall_struct);
}
else
{
kout << "syscall: syscall isn't valid at all! (is nullptr)\r";
}
}
else
{
kout << "syscall: syscall isn't hooked at all! (is set to false)\r";
}
kout << "syscall: Exit Syscall.\r";
}
}
/// @brief Enter Kernel call from assembly (DDK only).
/// @param stack the stack pushed from assembly routine.
/// @return nothing.
EXTERN_C Kernel::Void hal_kernel_call_enter(Kernel::UIntPtr rcx_kerncall_index, Kernel::UIntPtr rdx_kerncall_struct)
{
if (rcx_kerncall_index < kKerncalls.Count())
{
kout << "kerncall: Enter Kernel Call List.\r";
if (kKerncalls[rcx_kerncall_index].fHooked)
{
if (kKerncalls[rcx_kerncall_index].fProc)
{
(kKerncalls[rcx_kerncall_index].fProc)((Kernel::VoidPtr)rdx_kerncall_struct);
}
else
{
kout << "kerncall: Kernel call isn't valid at all! (is nullptr)\r";
}
}
else
{
kout << "kerncall: Kernel call isn't hooked at all! (is set to false)\r";
}
kout << "kerncall: Exit Kernel Call List.\r";
}
}
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