Method prepareException

source/emulation/cpu/common/cpu.cpp:229–273

}

void CPU::prepareException(int code, int error) {
    const KProcessPtr& process = this->thread->process;

     // blocking signals, signalfd can't handle these
    if (code==EXCEPTION_GP && (process->sigActions[K_SIGSEGV].handlerAndSigAction!=K_SIG_IGN && process->sigActions[K_SIGSEGV].handlerAndSigAction!=K_SIG_DFL)) {
        process->sigActions[K_SIGSEGV].sigInfo[0] = K_SIGSEGV;		
        process->sigActions[K_SIGSEGV].sigInfo[1] = error;
        process->sigActions[K_SIGSEGV].sigInfo[2] = 0;
        process->sigActions[K_SIGSEGV].sigInfo[3] = 0; // address
        process->sigActions[K_SIGSEGV].sigInfo[4] = 13; // trap #, TRAP_x86_PROTFLT
        this->thread->runSignal(K_SIGSEGV, 13, error);
    } else if (code==EXCEPTION_DIVIDE && error == 0 && (process->sigActions[K_SIGFPE].handlerAndSigAction!=K_SIG_IGN && process->sigActions[K_SIGFPE].handlerAndSigAction!=K_SIG_DFL)) {
        process->sigActions[K_SIGFPE].sigInfo[0] = K_SIGFPE;		
        process->sigActions[K_SIGFPE].sigInfo[1] = error;
        process->sigActions[K_SIGFPE].sigInfo[2] = K_FPE_INTDIV;
        process->sigActions[K_SIGFPE].sigInfo[3] = this->eip.u32; // address
        process->sigActions[K_SIGFPE].sigInfo[4] = 0; // trap #, TRAP_x86_DIVIDE
        this->thread->runSignal(K_SIGFPE, 0, error);
    } else if (code==EXCEPTION_DIVIDE && error == 1 && (process->sigActions[K_SIGSEGV].handlerAndSigAction!=K_SIG_IGN && process->sigActions[K_SIGSEGV].handlerAndSigAction!=K_SIG_DFL)) {
        process->sigActions[K_SIGSEGV].sigInfo[0] = K_SIGFPE;
        process->sigActions[K_SIGSEGV].sigInfo[1] = 0;
        process->sigActions[K_SIGSEGV].sigInfo[2] = K_FPE_INTOVF;
        process->sigActions[K_SIGSEGV].sigInfo[3] = this->eip.u32; // address
        process->sigActions[K_SIGSEGV].sigInfo[4] = 4; // trap #, TRAP_x86_OFLOW
        this->thread->runSignal(K_SIGSEGV, 4, error);
    } else if (code==EXCEPTION_NP &&  (process->sigActions[K_SIGSEGV].handlerAndSigAction!=K_SIG_IGN && process->sigActions[K_SIGSEGV].handlerAndSigAction!=K_SIG_DFL)) {
        process->sigActions[K_SIGSEGV].sigInfo[0] = K_SIGSEGV;		
        process->sigActions[K_SIGSEGV].sigInfo[1] = 0;
        process->sigActions[K_SIGSEGV].sigInfo[2] = 0;
        process->sigActions[K_SIGSEGV].sigInfo[3] = this->eip.u32; // address
        process->sigActions[K_SIGSEGV].sigInfo[4] = 11; // trap #, TRAP_x86_SEGNPFLT
        this->thread->runSignal(K_SIGSEGV, 11, error);
    } else if (code==EXCEPTION_SS &&  (process->sigActions[K_SIGSEGV].handlerAndSigAction!=K_SIG_IGN && process->sigActions[K_SIGSEGV].handlerAndSigAction!=K_SIG_DFL)) {
        process->sigActions[K_SIGSEGV].sigInfo[0] = K_SIGSEGV;		
        process->sigActions[K_SIGSEGV].sigInfo[1] = 0;
        process->sigActions[K_SIGSEGV].sigInfo[2] = 0;
        process->sigActions[K_SIGSEGV].sigInfo[3] = this->eip.u32; // address
        process->sigActions[K_SIGSEGV].sigInfo[4] = 12; // trap #, TRAP_x86_SEGNPFLT
        this->thread->runSignal(K_SIGSEGV, 12, error);
    } else {        
        CPU* cpu = this;
        this->walkStack(this->eip.u32, EBP, 2);
        kpanic_fmt("unhandled exception: code=%d error=%d", code, error);
    }
}

class TTYBufferAccess : public BufferAccess {
public: