force_sig_ptrace_errno_trap
force_sig_ptrace_errno_trap((int)num, (void __user *)(bkpt->trigger));
force_sig_ptrace_errno_trap(errno, (void __user *)far);
force_sig_ptrace_errno_trap(i, (void __user *)bkpt->address);
force_sig_ptrace_errno_trap(breakpt, /* breakpoint or watchpoint id */
force_sig_ptrace_errno_trap(i, (void __user *)bkpt->address);
int force_sig_ptrace_errno_trap(int errno, void __user *addr);