unistd.h

来自「Linux Kernel 2.6.9 for OMAP1710」· C头文件 代码 · 共 601 行 · 第 1/2 页

#undef  __NR_getresuid
#undef  __NR_setresgid
#undef  __NR_getresgid
#undef  __NR_chown
#undef  __NR_ugetrlimit
#undef  __NR_mmap2
#undef  __NR_truncate64
#undef  __NR_ftruncate64
#undef  __NR_stat64
#undef  __NR_lstat64
#undef  __NR_fstat64
#undef  __NR_lchown32
#undef  __NR_getuid32
#undef  __NR_getgid32
#undef  __NR_geteuid32
#undef  __NR_getegid32
#undef  __NR_setreuid32
#undef  __NR_setregid32
#undef  __NR_getgroups32
#undef  __NR_setgroups32
#undef  __NR_fchown32
#undef  __NR_setresuid32
#undef  __NR_getresuid32
#undef  __NR_setresgid32
#undef  __NR_getresgid32
#undef  __NR_chown32
#undef  __NR_setuid32
#undef  __NR_setgid32
#undef  __NR_setfsuid32
#undef  __NR_setfsgid32
#undef  __NR_getdents64
#undef  __NR_fcntl64
#undef  __NR_sendfile64
#undef  __NR_fadvise64_64

#define __NR_select		142
#define __NR_getrlimit		191	/* SuS compliant getrlimit */
#define __NR_lchown  		198
#define __NR_getuid  		199
#define __NR_getgid  		200
#define __NR_geteuid  		201
#define __NR_getegid  		202
#define __NR_setreuid  		203
#define __NR_setregid  		204
#define __NR_getgroups  	205
#define __NR_setgroups  	206
#define __NR_fchown  		207
#define __NR_setresuid  	208
#define __NR_getresuid  	209
#define __NR_setresgid  	210
#define __NR_getresgid  	211
#define __NR_chown  		212
#define __NR_setuid  		213
#define __NR_setgid  		214
#define __NR_setfsuid  		215
#define __NR_setfsgid  		216

#endif

/* user-visible error numbers are in the range -1 - -122: see <asm-s390/errno.h> */

#define __syscall_return(type, res)			     \
do {							     \
	if ((unsigned long)(res) >= (unsigned long)(-125)) { \
		errno = -(res);				     \
		res = -1;				     \
	}						     \
	return (type) (res);				     \
} while (0)

#define _svc_clobber "1", "cc", "memory"

#define _syscall0(type,name)				     \
type name(void) {					     \
	register long __svcres asm("2");		     \
	long __res;					     \
	__asm__ __volatile__ (				     \
		"    .if %1 < 256\n"			     \
		"    svc %b1\n"				     \
		"    .else\n"				     \
		"    la  %%r1,%1\n"			     \
		"    svc 0\n"				     \
		"    .endif"				     \
		: "=d" (__svcres)			     \
		: "i" (__NR_##name)			     \
		: _svc_clobber );			     \
	__res = __svcres;				     \
	__syscall_return(type,__res);			     \
}

#define _syscall1(type,name,type1,arg1)			     \
type name(type1 arg1) {					     \
	register type1 __arg1 asm("2") = arg1;		     \
	register long __svcres asm("2");		     \
	long __res;					     \
	__asm__ __volatile__ (				     \
		"    .if %1 < 256\n"			     \
		"    svc %b1\n"				     \
		"    .else\n"				     \
		"    la  %%r1,%1\n"			     \
		"    svc 0\n"				     \
		"    .endif"				     \
		: "=d" (__svcres)			     \
		: "i" (__NR_##name),			     \
		  "0" (__arg1)				     \
		: _svc_clobber );			     \
	__res = __svcres;				     \
	__syscall_return(type,__res);			     \
}

#define _syscall2(type,name,type1,arg1,type2,arg2)	     \
type name(type1 arg1, type2 arg2) {			     \
	register type1 __arg1 asm("2") = arg1;		     \
	register type2 __arg2 asm("3") = arg2;		     \
	register long __svcres asm("2");		     \
	long __res;					     \
	__asm__ __volatile__ (				     \
		"    .if %1 < 256\n"			     \
		"    svc %b1\n"				     \
		"    .else\n"				     \
		"    la %%r1,%1\n"			     \
		"    svc 0\n"				     \
		"    .endif"				     \
		: "=d" (__svcres)			     \
		: "i" (__NR_##name),			     \
		  "0" (__arg1),				     \
		  "d" (__arg2)				     \
		: _svc_clobber );			     \
	__res = __svcres;				     \
	__syscall_return(type,__res);			     \
}

#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3)\
type name(type1 arg1, type2 arg2, type3 arg3) {		     \
	register type1 __arg1 asm("2") = arg1;		     \
	register type2 __arg2 asm("3") = arg2;		     \
	register type3 __arg3 asm("4") = arg3;		     \
	register long __svcres asm("2");		     \
	long __res;					     \
	__asm__ __volatile__ (				     \
		"    .if %1 < 256\n"			     \
		"    svc %b1\n"				     \
		"    .else\n"				     \
		"    la  %%r1,%1\n"			     \
		"    svc 0\n"				     \
		"    .endif"				     \
		: "=d" (__svcres)			     \
		: "i" (__NR_##name),			     \
		  "0" (__arg1),				     \
		  "d" (__arg2),				     \
		  "d" (__arg3)				     \
		: _svc_clobber );			     \
	__res = __svcres;				     \
	__syscall_return(type,__res);			     \
}

#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,\
		  type4,name4)				     \
type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4) {  \
	register type1 __arg1 asm("2") = arg1;		     \
	register type2 __arg2 asm("3") = arg2;		     \
	register type3 __arg3 asm("4") = arg3;		     \
	register type4 __arg4 asm("5") = arg4;		     \
	register long __svcres asm("2");		     \
	long __res;					     \
	__asm__ __volatile__ (				     \
		"    .if %1 < 256\n"			     \
		"    svc %b1\n"				     \
		"    .else\n"				     \
		"    la  %%r1,%1\n"			     \
		"    svc 0\n"				     \
		"    .endif"				     \
		: "=d" (__svcres)			     \
		: "i" (__NR_##name),			     \
		  "0" (__arg1),				     \
		  "d" (__arg2),				     \
		  "d" (__arg3),				     \
		  "d" (__arg4)				     \
		: _svc_clobber );			     \
	__res = __svcres;				     \
	__syscall_return(type,__res);			     \
}

#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,\
		  type4,name4,type5,name5)		     \
type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4,    \
	  type5 arg5) {					     \
	register type1 __arg1 asm("2") = arg1;		     \
	register type2 __arg2 asm("3") = arg2;		     \
	register type3 __arg3 asm("4") = arg3;		     \
	register type4 __arg4 asm("5") = arg4;		     \
	register type5 __arg5 asm("6") = arg5;		     \
	register long __svcres asm("2");		     \
	long __res;					     \
	__asm__ __volatile__ (				     \
		"    .if %1 < 256\n"			     \
		"    svc %b1\n"				     \
		"    .else\n"				     \
		"    la  %%r1,%1\n"			     \
		"    svc 0\n"				     \
		"    .endif"				     \
		: "=d" (__svcres)			     \
		: "i" (__NR_##name),			     \
		  "0" (__arg1),				     \
		  "d" (__arg2),				     \
		  "d" (__arg3),				     \
		  "d" (__arg4),				     \
		  "d" (__arg5)				     \
		: _svc_clobber );			     \
	__res = __svcres;				     \
	__syscall_return(type,__res);			     \
}

#ifdef __KERNEL__
#define __ARCH_WANT_IPC_PARSE_VERSION
#define __ARCH_WANT_OLD_READDIR
#define __ARCH_WANT_SYS_ALARM
#define __ARCH_WANT_SYS_GETHOSTNAME
#define __ARCH_WANT_SYS_PAUSE
#define __ARCH_WANT_SYS_SIGNAL
#define __ARCH_WANT_SYS_TIME
#define __ARCH_WANT_SYS_UTIME
#define __ARCH_WANT_SYS_SOCKETCALL
#define __ARCH_WANT_SYS_FADVISE64
#define __ARCH_WANT_SYS_GETPGRP
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
# ifndef CONFIG_ARCH_S390X
#   define __ARCH_WANT_STAT64
# endif
#endif

#ifdef __KERNEL_SYSCALLS__

#include <linux/config.h>
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/ptrace.h>
#include <asm/stat.h>
#include <linux/syscalls.h>

/*
 * we need this inline - forking from kernel space will result
 * in NO COPY ON WRITE (!!!), until an execve is executed. This
 * is no problem, but for the stack. This is handled by not letting
 * main() use the stack at all after fork(). Thus, no function
 * calls - which means inline code for fork too, as otherwise we
 * would use the stack upon exit from 'fork()'.
 *
 * Actually only pause and fork are needed inline, so that there
 * won't be any messing with the stack from main(), but we define
 * some others too.
 */
#define __NR__exit __NR_exit
static inline _syscall0(pid_t,setsid)
static inline _syscall3(int,write,int,fd,const char *,buf,off_t,count)
static inline _syscall3(int,read,int,fd,char *,buf,off_t,count)
static inline _syscall3(off_t,lseek,int,fd,off_t,offset,int,count)
static inline _syscall1(int,dup,int,fd)
static inline _syscall3(int,execve,const char *,file,char **,argv,char **,envp)
static inline _syscall3(int,open,const char *,file,int,flag,int,mode)
static inline _syscall1(int,close,int,fd)
static inline _syscall2(long,stat,char *,filename,struct stat *,statbuf)

static inline pid_t waitpid(int pid, int *wait_stat, int flags)
{
	return sys_wait4(pid, wait_stat, flags, NULL);
}
struct mmap_arg_struct;
asmlinkage long sys_mmap2(struct mmap_arg_struct __user *arg);

asmlinkage long sys_execve(struct pt_regs regs);
asmlinkage long sys_clone(struct pt_regs regs);
asmlinkage long sys_fork(struct pt_regs regs);
asmlinkage long sys_vfork(struct pt_regs regs);
asmlinkage long sys_pipe(unsigned long __user *fildes);
asmlinkage long sys_ptrace(long request, long pid, long addr, long data);
struct sigaction;
asmlinkage long sys_rt_sigaction(int sig,
				const struct sigaction __user *act,
				struct sigaction __user *oact,
				size_t sigsetsize);

#endif

/*
 * "Conditional" syscalls
 *
 * What we want is __attribute__((weak,alias("sys_ni_syscall"))),
 * but it doesn't work on all toolchains, so we just do it by hand
 */
#define cond_syscall(x) asm(".weak\t" #x "\n\t.set\t" #x ",sys_ni_syscall");

#endif /* _ASM_S390_UNISTD_H_ */