/// <summary>
/// Processes a signal
/// </summary>
/// <param name="action">The action</param>
/// <returns>The signal context</returns>
public ISignalContext ProcessSignal(SignalAction action)
{
X86SignalContext context = new X86SignalContext();
// Push arguments
*--context.Stack = 0; // Context (unused)
*--context.Stack = 0x7331; // TODO: siginfo
*--context.Stack = action.SignalNumber;
// Return address of signal handling method
*--context.Stack = (int)Util.MethodToPtr(SignalAction.ReturnFromSignal);
// Backup regs so we can restore later
Memory.Memcpy(context.Sysregs, m_sysRegs, sizeof(RegsDirect));
// Modify regs to return to
m_sysRegs->ESP = (int)context.Stack;
m_sysRegs->EIP = (int)action.Sigaction.Handler;
m_sysRegs->EAX = 0;
m_sysRegs->EBX = 0;
m_sysRegs->ECX = 0;
m_sysRegs->EDX = 0;
m_sysRegs->ESI = 0;
m_sysRegs->EDI = 0;
return(context);
}
/// <summary>
/// Returns from signal (restores original context)
/// </summary>
/// <param name="oldContext">Old context</param>
public void ReturnFromSignal(ISignalContext oldContext)
{
X86SignalContext old = (X86SignalContext)oldContext;
Memory.Memcpy(m_sysRegs, old.Sysregs, sizeof(RegsDirect));
}