unistd.h

《嵌入式系统设计与实例开发实验教材二源码》Linux内核移植与编译实验

#define __NR_settimeofday		360
#define __NR_getitimer			361
#define __NR_setitimer			362
#define __NR_utimes			363
#define __NR_getrusage			364
#define __NR_wait4			365
#define __NR_adjtimex			366
#define __NR_getcwd			367
#define __NR_capget			368
#define __NR_capset			369
#define __NR_sendfile			370
#define __NR_setresgid			371
#define __NR_getresgid			372
#define __NR_dipc			373
#define __NR_pivot_root			374
#define __NR_mincore			375
#define __NR_pciconfig_iobase		376
#define __NR_getdents64			377
#define __NR_gettid			378
#define __NR_readahead			379
#define __NR_security			380 /* syscall for security modules */

#if defined(__GNUC__)

#define _syscall_return(type)						\
	return (_sc_err ? errno = _sc_ret, _sc_ret = -1L : 0), (type) _sc_ret

#define _syscall_clobbers						\
	"$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8",			\
	"$22", "$23", "$24", "$25", "$27", "$28" 			\

#define _syscall0(type, name)						\
type name(void)								\
{									\
	long _sc_ret, _sc_err;						\
	{								\
		register long _sc_0 __asm__("$0");			\
		register long _sc_19 __asm__("$19");			\
									\
		_sc_0 = __NR_##name;					\
		__asm__("callsys # %0 %1 %2"				\
			: "=r"(_sc_0), "=r"(_sc_19)			\
			: "0"(_sc_0)					\
			: _syscall_clobbers);				\
		_sc_ret = _sc_0, _sc_err = _sc_19;			\
	}								\
	_syscall_return(type);						\
}

#define _syscall1(type,name,type1,arg1)					\
type name(type1 arg1)							\
{									\
	long _sc_ret, _sc_err;						\
	{								\
		register long _sc_0 __asm__("$0");			\
		register long _sc_16 __asm__("$16");			\
		register long _sc_19 __asm__("$19");			\
									\
		_sc_0 = __NR_##name;					\
		_sc_16 = (long) (arg1);					\
		__asm__("callsys # %0 %1 %2 %3"				\
			: "=r"(_sc_0), "=r"(_sc_19)			\
			: "0"(_sc_0), "r"(_sc_16)			\
			: _syscall_clobbers);				\
		_sc_ret = _sc_0, _sc_err = _sc_19;			\
	}								\
	_syscall_return(type);						\
}

#define _syscall2(type,name,type1,arg1,type2,arg2)			\
type name(type1 arg1,type2 arg2)					\
{									\
	long _sc_ret, _sc_err;						\
	{								\
		register long _sc_0 __asm__("$0");			\
		register long _sc_16 __asm__("$16");			\
		register long _sc_17 __asm__("$17");			\
		register long _sc_19 __asm__("$19");			\
									\
		_sc_0 = __NR_##name;					\
		_sc_16 = (long) (arg1);					\
		_sc_17 = (long) (arg2);					\
		__asm__("callsys # %0 %1 %2 %3 %4"			\
			: "=r"(_sc_0), "=r"(_sc_19)			\
			: "0"(_sc_0), "r"(_sc_16), "r"(_sc_17)		\
			: _syscall_clobbers);				\
		_sc_ret = _sc_0, _sc_err = _sc_19;			\
	}								\
	_syscall_return(type);						\
}

#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3)		\
type name(type1 arg1,type2 arg2,type3 arg3)				\
{									\
	long _sc_ret, _sc_err;						\
	{								\
		register long _sc_0 __asm__("$0");			\
		register long _sc_16 __asm__("$16");			\
		register long _sc_17 __asm__("$17");			\
		register long _sc_18 __asm__("$18");			\
		register long _sc_19 __asm__("$19");			\
									\
		_sc_0 = __NR_##name;					\
		_sc_16 = (long) (arg1);					\
		_sc_17 = (long) (arg2);					\
		_sc_18 = (long) (arg3);					\
		__asm__("callsys # %0 %1 %2 %3 %4 %5"			\
			: "=r"(_sc_0), "=r"(_sc_19)			\
			: "0"(_sc_0), "r"(_sc_16), "r"(_sc_17),		\
			  "r"(_sc_18)					\
			: _syscall_clobbers);				\
		_sc_ret = _sc_0, _sc_err = _sc_19;			\
	}								\
	_syscall_return(type);						\
}

#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type name (type1 arg1, type2 arg2, type3 arg3, type4 arg4)		 \
{									 \
	long _sc_ret, _sc_err;						\
	{								\
		register long _sc_0 __asm__("$0");			\
		register long _sc_16 __asm__("$16");			\
		register long _sc_17 __asm__("$17");			\
		register long _sc_18 __asm__("$18");			\
		register long _sc_19 __asm__("$19");			\
									\
		_sc_0 = __NR_##name;					\
		_sc_16 = (long) (arg1);					\
		_sc_17 = (long) (arg2);					\
		_sc_18 = (long) (arg3);					\
		_sc_19 = (long) (arg4);					\
		__asm__("callsys # %0 %1 %2 %3 %4 %5 %6"		\
			: "=r"(_sc_0), "=r"(_sc_19)			\
			: "0"(_sc_0), "r"(_sc_16), "r"(_sc_17),		\
			  "r"(_sc_18), "1"(_sc_19)			\
			: _syscall_clobbers);				\
		_sc_ret = _sc_0, _sc_err = _sc_19;			\
	}								\
	_syscall_return(type);						\
} 

#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
	  type5,arg5)							 \
type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5)	\
{									\
	long _sc_ret, _sc_err;						\
	{								\
		register long _sc_0 __asm__("$0");			\
		register long _sc_16 __asm__("$16");			\
		register long _sc_17 __asm__("$17");			\
		register long _sc_18 __asm__("$18");			\
		register long _sc_19 __asm__("$19");			\
		register long _sc_20 __asm__("$20");			\
									\
		_sc_0 = __NR_##name;					\
		_sc_16 = (long) (arg1);					\
		_sc_17 = (long) (arg2);					\
		_sc_18 = (long) (arg3);					\
		_sc_19 = (long) (arg4);					\
		_sc_20 = (long) (arg5);					\
		__asm__("callsys # %0 %1 %2 %3 %4 %5 %6 %7"		\
			: "=r"(_sc_0), "=r"(_sc_19)			\
			: "0"(_sc_0), "r"(_sc_16), "r"(_sc_17),		\
			  "r"(_sc_18), "1"(_sc_19), "r"(_sc_20)		\
			: _syscall_clobbers);				\
		_sc_ret = _sc_0, _sc_err = _sc_19;			\
	}								\
	_syscall_return(type);						\
}

#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
	  type5,arg5,type6,arg6)					 \
type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5, type6 arg6)\
{									\
	long _sc_ret, _sc_err;						\
	{								\
		register long _sc_0 __asm__("$0");			\
		register long _sc_16 __asm__("$16");			\
		register long _sc_17 __asm__("$17");			\
		register long _sc_18 __asm__("$18");			\
		register long _sc_19 __asm__("$19");			\
		register long _sc_20 __asm__("$20");			\
		register long _sc_21 __asm__("$21");			\
									\
		_sc_0 = __NR_##name;					\
		_sc_16 = (long) (arg1);					\
		_sc_17 = (long) (arg2);					\
		_sc_18 = (long) (arg3);					\
		_sc_19 = (long) (arg4);					\
		_sc_20 = (long) (arg5);					\
		_sc_21 = (long) (arg6);					\
		__asm__("callsys # %0 %1 %2 %3 %4 %5 %6 %7 %8"		\
			: "=r"(_sc_0), "=r"(_sc_19)			\
			: "0"(_sc_0), "r"(_sc_16), "r"(_sc_17),		\
			  "r"(_sc_18), "1"(_sc_19), "r"(_sc_20), "r"(_sc_21) \
			: _syscall_clobbers);				\
		_sc_ret = _sc_0, _sc_err = _sc_19;			\
	}								\
	_syscall_return(type);						\
}

#endif /* __LIBRARY__ && __GNUC__ */

#ifdef __KERNEL_SYSCALLS__

#include <linux/string.h>
#include <linux/signal.h>

extern void sys_idle(void);
static inline void idle(void)
{
	sys_idle();
}

extern long sys_open(const char *, int, int);
static inline long open(const char * name, int mode, int flags)
{
	return sys_open(name, mode, flags);
}

extern long sys_dup(int);
static inline long dup(int fd)
{
	return sys_dup(fd);
}

static inline long close(int fd)
{
	return sys_close(fd);
}

extern off_t sys_lseek(int, off_t, int);
static inline off_t lseek(int fd, off_t off, int whense)
{
	return sys_lseek(fd, off, whense);
}

extern long sys_exit(int);
static inline long _exit(int value)
{
	return sys_exit(value);
}

#define exit(x) _exit(x)

extern long sys_write(int, const char *, int);
static inline long write(int fd, const char * buf, int nr)
{
	return sys_write(fd, buf, nr);
}

extern long sys_read(int, char *, int);
static inline long read(int fd, char * buf, int nr)
{
	return sys_read(fd, buf, nr);
}

extern int __kernel_execve(char *, char **, char **, struct pt_regs *);
static inline long execve(char * file, char ** argvp, char ** envp)
{
	struct pt_regs regs;
	memset(&regs, 0, sizeof(regs));
	return __kernel_execve(file, argvp, envp, &regs);
}

extern long sys_setsid(void);
static inline long setsid(void)
{
	return sys_setsid();
}

extern long sys_sync(void);
static inline long sync(void)
{
	return sys_sync();
}

static inline pid_t waitpid(int pid, int * wait_stat, int flags)
{
	return sys_wait4(pid, wait_stat, flags, NULL);
}

static inline pid_t wait(int * wait_stat)
{
	return waitpid(-1,wait_stat,0);
}

extern long sys_delete_module(const char *name);
static inline long delete_module(const char *name)
{
	return sys_delete_module(name);
}

#endif

#endif /* _ALPHA_UNISTD_H */