litmus-rt.git - The LITMUS^RT kernel.

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The LITMUS^RT kernel.

Bjoern Brandenburg

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/*
 * syscalls.h - Linux syscall interfaces (non-arch-specific)
 *
 * Copyright (c) 2004 Randy Dunlap
 * Copyright (c) 2004 Open Source Development Labs
 *
 * This file is released under the GPLv2.
 * See the file COPYING for more details.
 */

#ifndef _LINUX_SYSCALLS_H
#define _LINUX_SYSCALLS_H

struct epoll_event;
struct iattr;
struct inode;
struct iocb;
struct io_event;
struct iovec;
struct itimerspec;
struct itimerval;
struct kexec_segment;
struct linux_dirent;
struct linux_dirent64;
struct list_head;
struct mmap_arg_struct;
struct msgbuf;
struct msghdr;
struct mmsghdr;
struct msqid_ds;
struct new_utsname;
struct nfsctl_arg;
struct __old_kernel_stat;
struct oldold_utsname;
struct old_utsname;
struct pollfd;
struct rlimit;
struct rlimit64;
struct rusage;
struct sched_param;
struct sel_arg_struct;
struct semaphore;
struct sembuf;
struct shmid_ds;
struct sockaddr;
struct stat;
struct stat64;
struct statfs;
struct statfs64;
struct __sysctl_args;
struct sysinfo;
struct timespec;
struct timeval;
struct timex;
struct timezone;
struct tms;
struct utimbuf;
struct mq_attr;
struct compat_stat;
struct compat_timeval;
struct robust_list_head;
struct getcpu_cache;
struct old_linux_dirent;
struct perf_event_attr;
struct file_handle;

#include <linux/types.h>
#include <linux/aio_abi.h>
#include <linux/capability.h>
#include <linux/list.h>
#include <linux/sem.h>
#include <asm/siginfo.h>
#include <asm/signal.h>
#include <linux/unistd.h>
#include <linux/quota.h>
#include <linux/key.h>
#include <trace/syscall.h>

#define __SC_DECL1(t1, a1)	t1 a1
#define __SC_DECL2(t2, a2, ...) t2 a2, __SC_DECL1(__VA_ARGS__)
#define __SC_DECL3(t3, a3, ...) t3 a3, __SC_DECL2(__VA_ARGS__)
#define __SC_DECL4(t4, a4, ...) t4 a4, __SC_DECL3(__VA_ARGS__)
#define __SC_DECL5(t5, a5, ...) t5 a5, __SC_DECL4(__VA_ARGS__)
#define __SC_DECL6(t6, a6, ...) t6 a6, __SC_DECL5(__VA_ARGS__)

#define __SC_LONG1(t1, a1) 	long a1
#define __SC_LONG2(t2, a2, ...) long a2, __SC_LONG1(__VA_ARGS__)
#define __SC_LONG3(t3, a3, ...) long a3, __SC_LONG2(__VA_ARGS__)
#define __SC_LONG4(t4, a4, ...) long a4, __SC_LONG3(__VA_ARGS__)
#define __SC_LONG5(t5, a5, ...) long a5, __SC_LONG4(__VA_ARGS__)
#define __SC_LONG6(t6, a6, ...) long a6, __SC_LONG5(__VA_ARGS__)

#define __SC_CAST1(t1, a1)	(t1) a1
#define __SC_CAST2(t2, a2, ...) (t2) a2, __SC_CAST1(__VA_ARGS__)
#define __SC_CAST3(t3, a3, ...) (t3) a3, __SC_CAST2(__VA_ARGS__)
#define __SC_CAST4(t4, a4, ...) (t4) a4, __SC_CAST3(__VA_ARGS__)
#define __SC_CAST5(t5, a5, ...) (t5) a5, __SC_CAST4(__VA_ARGS__)
#define __SC_CAST6(t6, a6, ...) (t6) a6, __SC_CAST5(__VA_ARGS__)

#define __SC_TEST(type)		BUILD_BUG_ON(sizeof(type) > sizeof(long))
#define __SC_TEST1(t1, a1)	__SC_TEST(t1)
#define __SC_TEST2(t2, a2, ...)	__SC_TEST(t2); __SC_TEST1(__VA_ARGS__)
#define __SC_TEST3(t3, a3, ...)	__SC_TEST(t3); __SC_TEST2(__VA_ARGS__)
#define __SC_TEST4(t4, a4, ...)	__SC_TEST(t4); __SC_TEST3(__VA_ARGS__)
#define __SC_TEST5(t5, a5, ...)	__SC_TEST(t5); __SC_TEST4(__VA_ARGS__)
#define __SC_TEST6(t6, a6, ...)	__SC_TEST(t6); __SC_TEST5(__VA_ARGS__)

#ifdef CONFIG_FTRACE_SYSCALLS
#define __SC_STR_ADECL1(t, a)		#a
#define __SC_STR_ADECL2(t, a, ...)	#a, __SC_STR_ADECL1(__VA_ARGS__)
#define __SC_STR_ADECL3(t, a, ...)	#a, __SC_STR_ADECL2(__VA_ARGS__)
#define __SC_STR_ADECL4(t, a, ...)	#a, __SC_STR_ADECL3(__VA_ARGS__)
#define __SC_STR_ADECL5(t, a, ...)	#a, __SC_STR_ADECL4(__VA_ARGS__)
#define __SC_STR_ADECL6(t, a, ...)	#a, __SC_STR_ADECL5(__VA_ARGS__)

#define __SC_STR_TDECL1(t, a)		#t
#define __SC_STR_TDECL2(t, a, ...)	#t, __SC_STR_TDECL1(__VA_ARGS__)
#define __SC_STR_TDECL3(t, a, ...)	#t, __SC_STR_TDECL2(__VA_ARGS__)
#define __SC_STR_TDECL4(t, a, ...)	#t, __SC_STR_TDECL3(__VA_ARGS__)
#define __SC_STR_TDECL5(t, a, ...)	#t, __SC_STR_TDECL4(__VA_ARGS__)
#define __SC_STR_TDECL6(t, a, ...)	#t, __SC_STR_TDECL5(__VA_ARGS__)

extern struct ftrace_event_class event_class_syscall_enter;
extern struct ftrace_event_class event_class_syscall_exit;
extern struct trace_event_functions enter_syscall_print_funcs;
extern struct trace_event_functions exit_syscall_print_funcs;

#define SYSCALL_TRACE_ENTER_EVENT(sname)				\
	static struct syscall_metadata __syscall_meta_##sname;		\
	static struct ftrace_event_call __used				\
	  event_enter_##sname = {					\
		.name                   = "sys_enter"#sname,		\
		.class			= &event_class_syscall_enter,	\
		.event.funcs            = &enter_syscall_print_funcs,	\
		.data			= (void *)&__syscall_meta_##sname,\
		.flags			= TRACE_EVENT_FL_CAP_ANY,	\
	};								\
	static struct ftrace_event_call __used				\
	  __attribute__((section("_ftrace_events")))			\
	 *__event_enter_##sname = &event_enter_##sname;

#define SYSCALL_TRACE_EXIT_EVENT(sname)					\
	static struct syscall_metadata __syscall_meta_##sname;		\
	static struct ftrace_event_call __used				\
	  event_exit_##sname = {					\
		.name                   = "sys_exit"#sname,		\
		.class			= &event_class_syscall_exit,	\
		.event.funcs		= &exit_syscall_print_funcs,	\
		.data			= (void *)&__syscall_meta_##sname,\
		.flags			= TRACE_EVENT_FL_CAP_ANY,	\
	};								\
	static struct ftrace_event_call __used				\
	  __attribute__((section("_ftrace_events")))			\
	*__event_exit_##sname = &event_exit_##sname;

#define SYSCALL_METADATA(sname, nb)				\
	SYSCALL_TRACE_ENTER_EVENT(sname);			\
	SYSCALL_TRACE_EXIT_EVENT(sname);			\
	static struct syscall_metadata __used			\
	  __syscall_meta_##sname = {				\
		.name 		= "sys"#sname,			\
		.syscall_nr	= -1,	/* Filled in at boot */	\
		.nb_args 	= nb,				\
		.types		= types_##sname,		\
		.args		= args_##sname,			\
		.enter_event	= &event_enter_##sname,		\
		.exit_event	= &event_exit_##sname,		\
		.enter_fields	= LIST_HEAD_INIT(__syscall_meta_##sname.enter_fields), \
	};							\
	static struct syscall_metadata __used			\
	  __attribute__((section("__syscalls_metadata")))	\
	 *__p_syscall_meta_##sname = &__syscall_meta_##sname;

#define SYSCALL_DEFINE0(sname)					\
	SYSCALL_TRACE_ENTER_EVENT(_##sname);			\
	SYSCALL_TRACE_EXIT_EVENT(_##sname);			\
	static struct syscall_metadata __used			\
	  __syscall_meta__##sname = {				\
		.name 		= "sys_"#sname,			\
		.syscall_nr	= -1,	/* Filled in at boot */	\
		.nb_args 	= 0,				\
		.enter_event	= &event_enter__##sname,	\
		.exit_event	= &event_exit__##sname,		\
		.enter_fields	= LIST_HEAD_INIT(__syscall_meta__##sname.enter_fields), \
	};							\
	static struct syscall_metadata __used			\
	  __attribute__((section("__syscalls_metadata")))	\
	 *__p_syscall_meta_##sname = &__syscall_meta__##sname;	\
	asmlinkage long sys_##sname(void)
#else
#define SYSCALL_DEFINE0(name)	   asmlinkage long sys_##name(void)
#endif

#define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
#define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
#define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
#define SYSCALL_DEFINE4(name, ...) SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
#define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
#define SYSCALL_DEFINE6(name, ...) SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)

#ifdef CONFIG_PPC64
#define SYSCALL_ALIAS(alias, name)					\
	asm ("\t.globl " #alias "\n\t.set " #alias ", " #name "\n"	\
	     "\t.globl ." #alias "\n\t.set ." #alias ", ." #name)
#else
#if defined(CONFIG_ALPHA) || defined(CONFIG_MIPS)
#define SYSCALL_ALIAS(alias, name)					\
	asm ( #alias " = " #name "\n\t.globl " #alias)
#else
#define SYSCALL_ALIAS(alias, name)					\
	asm ("\t.globl " #alias "\n\t.set " #alias ", " #name)
#endif
#endif

#ifdef CONFIG_FTRACE_SYSCALLS
#define SYSCALL_DEFINEx(x, sname, ...)				\
	static const char *types_##sname[] = {			\
		__SC_STR_TDECL##x(__VA_ARGS__)			\
	};							\
	static const char *args_##sname[] = {			\
		__SC_STR_ADECL##x(__VA_ARGS__)			\
	};							\
	SYSCALL_METADATA(sname, x);				\
	__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
#else
#define SYSCALL_DEFINEx(x, sname, ...)				\
	__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
#endif

#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS

#define SYSCALL_DEFINE(name) static inline long SYSC_##name

#define __SYSCALL_DEFINEx(x, name, ...)					\
	asmlinkage long sys##name(__SC_DECL##x(__VA_ARGS__));		\
	static inline long SYSC##name(__SC_DECL##x(__VA_ARGS__));	\
	asmlinkage long SyS##name(__SC_LONG##x(__VA_ARGS__))		\


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