os-k/kaleid/kernel/ke/panic.c

//----------------------------------------------------------------------------//
//                           GNU GPL OS/K                                     //
//                                                                            //
//  Authors:    spectral`                                                     //
//              NeoX                                                          //
//                                                                            //
//  Desc:       How NOT to panic 101                                          //
//----------------------------------------------------------------------------//

#define _UNLOCKED_IO
#include <kaleid.h>

//
// Failed assert() handler
//
noreturn void _assert_handler(const char *msg,
                              const char *file,
                              int line,
                              const char *func)
{
    DisableIRQs();

    (void)file; (void)line; (void)func;

    // XXX sprintf() to create a proper panicstr
    StartPanic(msg);
}

//
// Your best boy panic()
// This is CPU local...
//
noreturn void StartPanic(const char *str)
{
    DisableIRQs();

    // This should be made atomic
    SetKernState(KSTATE_PANIC);

    if (GetCurProc()) __CurProc[GetCurCPU()] = NULL;
    if (GetStdOut() == NULL) CrashSystem();

    GetStdOut()->ClearTermUnlocked(GetStdOut());

    if (str == NULL) {
        str = "(no message given)";
    }

    if (GetPanicStr()) {
        GetStdOut()->PrintOnTermUnlocked(GetStdOut(), "\nDouble panic!\n");
        HaltCPU();
    }

    _SetPanicStr(str);

    GetStdOut()->PrintOnTermUnlocked(GetStdOut(), "PANIC! - ");
    GetStdOut()->PrintOnTermUnlocked(GetStdOut(), str);

    HaltCPU();
}

//
// Oh well
//
noreturn void CrashSystem(void)
{
    DisableIRQs();
    HaltCPU();
}