69 #define KVM86	((struct kernel_vm86_struct *)regs)
76 #define AL(regs)	(((unsigned char *)&((regs)->pt.ax))[0])  argument
77 #define AH(regs)	(((unsigned char *)&((regs)->pt.ax))[1])  argument
78 #define IP(regs)	(*(unsigned short *)&((regs)->pt.ip))  argument
79 #define SP(regs)	(*(unsigned short *)&((regs)->pt.sp))  argument
95 				  const struct kernel_vm86_regs *regs)  in copy_vm86_regs_to_user()  argument
103 	ret += copy_to_user(user, regs, offsetof(struct kernel_vm86_regs, pt.orig_ax));  in copy_vm86_regs_to_user()
104 	ret += copy_to_user(&user->orig_eax, &regs->pt.orig_ax,  in copy_vm86_regs_to_user()
112 static int copy_vm86_regs_from_user(struct kernel_vm86_regs *regs,  in copy_vm86_regs_from_user()  argument
119 	ret += copy_from_user(regs, user, offsetof(struct kernel_vm86_regs, pt.orig_ax));  in copy_vm86_regs_from_user()
121 	ret += copy_from_user(&regs->pt.orig_ax, &user->orig_eax,  in copy_vm86_regs_from_user()
128 struct pt_regs *save_v86_state(struct kernel_vm86_regs *regs)  in save_v86_state()  argument
145 	set_flags(regs->pt.flags, VEFLAGS, X86_EFLAGS_VIF | current->thread.v86mask);  in save_v86_state()
146 	tmp = copy_vm86_regs_to_user(&current->thread.vm86_info->regs, regs);  in save_v86_state()
217 	tmp = copy_vm86_regs_from_user(&info.regs, &v86->regs,  in SYSCALL_DEFINE1()
219 				       sizeof(info.regs));  in SYSCALL_DEFINE1()
262 	tmp = copy_vm86_regs_from_user(&info.regs, &v86->regs,  in SYSCALL_DEFINE2()
264 				       sizeof(info.regs));  in SYSCALL_DEFINE2()
281 	info->regs.pt.ds = 0;  in do_sys_vm86()
282 	info->regs.pt.es = 0;  in do_sys_vm86()
283 	info->regs.pt.fs = 0;  in do_sys_vm86()
285 	info->regs.pt.gs = 0;  in do_sys_vm86()
293 	VEFLAGS = info->regs.pt.flags;  in do_sys_vm86()
294 	info->regs.pt.flags &= SAFE_MASK;  in do_sys_vm86()
295 	info->regs.pt.flags |= info->regs32->flags & ~SAFE_MASK;  in do_sys_vm86()
296 	info->regs.pt.flags |= X86_VM_MASK;  in do_sys_vm86()
346 		:"r" (&info->regs), "r" (task_thread_info(tsk)), "r" (0));  in do_sys_vm86()
362 static inline void set_IF(struct kernel_vm86_regs *regs)  in set_IF()  argument
366 		return_to_32bit(regs, VM86_STI);  in set_IF()
369 static inline void clear_IF(struct kernel_vm86_regs *regs)  in clear_IF()  argument
374 static inline void clear_TF(struct kernel_vm86_regs *regs)  in clear_TF()  argument
376 	regs->pt.flags &= ~X86_EFLAGS_TF;  in clear_TF()
379 static inline void clear_AC(struct kernel_vm86_regs *regs)  in clear_AC()  argument
381 	regs->pt.flags &= ~X86_EFLAGS_AC;  in clear_AC()
396 static inline void set_vflags_long(unsigned long flags, struct kernel_vm86_regs *regs)  in set_vflags_long()  argument
399 	set_flags(regs->pt.flags, flags, SAFE_MASK);  in set_vflags_long()
401 		set_IF(regs);  in set_vflags_long()
403 		clear_IF(regs);  in set_vflags_long()
406 static inline void set_vflags_short(unsigned short flags, struct kernel_vm86_regs *regs)  in set_vflags_short()  argument
409 	set_flags(regs->pt.flags, flags, SAFE_MASK);  in set_vflags_short()
411 		set_IF(regs);  in set_vflags_short()
413 		clear_IF(regs);  in set_vflags_short()
416 static inline unsigned long get_vflags(struct kernel_vm86_regs *regs)  in get_vflags()  argument
418 	unsigned long flags = regs->pt.flags & RETURN_MASK;  in get_vflags()
516 static void do_int(struct kernel_vm86_regs *regs, int i,  in do_int()  argument
522 	if (regs->pt.cs == BIOSSEG)  in do_int()
526 	if (i == 0x21 && is_revectored(AH(regs), &KVM86->int21_revectored))  in do_int()
533 	pushw(ssp, sp, get_vflags(regs), cannot_handle);  in do_int()
534 	pushw(ssp, sp, regs->pt.cs, cannot_handle);  in do_int()
535 	pushw(ssp, sp, IP(regs), cannot_handle);  in do_int()
536 	regs->pt.cs = segoffs >> 16;  in do_int()
537 	SP(regs) -= 6;  in do_int()
538 	IP(regs) = segoffs & 0xffff;  in do_int()
539 	clear_TF(regs);  in do_int()
540 	clear_IF(regs);  in do_int()
541 	clear_AC(regs);  in do_int()
545 	return_to_32bit(regs, VM86_INTx + (i << 8));  in do_int()
548 int handle_vm86_trap(struct kernel_vm86_regs *regs, long error_code, int trapno)  in handle_vm86_trap()  argument
559 		do_int(regs, trapno, (unsigned char __user *) (regs->pt.ss << 4), SP(regs));  in handle_vm86_trap()
570 void handle_vm86_fault(struct kernel_vm86_regs *regs, long error_code)  in handle_vm86_fault()  argument
583 		return_to_32bit(regs, VM86_PICRETURN); \  in handle_vm86_fault()
585 		handle_vm86_trap(regs, 0, 1); \  in handle_vm86_fault()
588 	orig_flags = *(unsigned short *)&regs->pt.flags;  in handle_vm86_fault()
590 	csp = (unsigned char __user *) (regs->pt.cs << 4);  in handle_vm86_fault()
591 	ssp = (unsigned char __user *) (regs->pt.ss << 4);  in handle_vm86_fault()
592 	sp = SP(regs);  in handle_vm86_fault()
593 	ip = IP(regs);  in handle_vm86_fault()
618 			pushl(ssp, sp, get_vflags(regs), simulate_sigsegv);  in handle_vm86_fault()
619 			SP(regs) -= 4;  in handle_vm86_fault()
621 			pushw(ssp, sp, get_vflags(regs), simulate_sigsegv);  in handle_vm86_fault()
622 			SP(regs) -= 2;  in handle_vm86_fault()
624 		IP(regs) = ip;  in handle_vm86_fault()
633 			SP(regs) += 4;  in handle_vm86_fault()
636 			SP(regs) += 2;  in handle_vm86_fault()
638 		IP(regs) = ip;  in handle_vm86_fault()
641 			set_vflags_long(newflags, regs);  in handle_vm86_fault()
643 			set_vflags_short(newflags, regs);  in handle_vm86_fault()
651 		IP(regs) = ip;  in handle_vm86_fault()
654 				return_to_32bit(regs, VM86_INTx + (intno << 8));  in handle_vm86_fault()
656 		do_int(regs, intno, ssp, sp);  in handle_vm86_fault()
670 			SP(regs) += 12;  in handle_vm86_fault()
675 			SP(regs) += 6;  in handle_vm86_fault()
677 		IP(regs) = newip;  in handle_vm86_fault()
678 		regs->pt.cs = newcs;  in handle_vm86_fault()
681 			set_vflags_long(newflags, regs);  in handle_vm86_fault()
683 			set_vflags_short(newflags, regs);  in handle_vm86_fault()
690 		IP(regs) = ip;  in handle_vm86_fault()
691 		clear_IF(regs);  in handle_vm86_fault()
702 		IP(regs) = ip;  in handle_vm86_fault()
703 		set_IF(regs);  in handle_vm86_fault()
707 		return_to_32bit(regs, VM86_UNKNOWN);  in handle_vm86_fault()
723 	return_to_32bit(regs, VM86_UNKNOWN);  in handle_vm86_fault()