1. 根目录:
2. arch
3. frv
4. include
5. asm
6. ucontext.h

#ifndef _ASM_UCONTEXT_H
#define _ASM_UCONTEXT_H

struct ucontext {
	unsigned long		uc_flags;
	struct ucontext		*uc_link;
	stack_t			uc_stack;
	struct sigcontext	uc_mcontext;
	sigset_t		uc_sigmask;	/* mask last for extensibility */
};

#endif