handle_vm86_trap
int handle_vm86_trap(struct kernel_vm86_regs *, long, int);
handle_vm86_trap((struct kernel_vm86_regs *)regs, 0, X86_TRAP_DB);
if (!handle_vm86_trap((struct kernel_vm86_regs *) regs,
handle_vm86_trap(regs, 0, X86_TRAP_DB);