path: root/include/linux/syscalls.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * syscalls.h - Linux syscall interfaces (non-arch-specific)
 *
 * Copyright (c) 2004 Randy Dunlap
 * Copyright (c) 2004 Open Source Development Labs
 */

#ifndef _LINUX_SYSCALLS_H
#define _LINUX_SYSCALLS_H

struct __aio_sigset;
struct epoll_event;
struct iattr;
struct inode;
struct iocb;
struct io_event;
struct iovec;
struct __kernel_old_itimerval;
struct kexec_segment;
struct linux_dirent;
struct linux_dirent64;
struct list_head;
struct mmap_arg_struct;
struct msgbuf;
struct user_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 sched_attr;
struct sel_arg_struct;
struct semaphore;
struct sembuf;
struct shmid_ds;
struct sockaddr;
struct stat;
struct stat64;
struct statfs;
struct statfs64;
struct statx;
struct sysinfo;
struct timespec;
struct __kernel_old_timeval;
struct __kernel_timex;
struct timezone;
struct tms;
struct utimbuf;
struct mq_attr;
struct compat_stat;
struct old_timeval32;
struct robust_list_head;
struct futex_waitv;
struct getcpu_cache;
struct old_linux_dirent;
struct perf_event_attr;
struct file_handle;
struct sigaltstack;
struct rseq;
union bpf_attr;
struct io_uring_params;
struct clone_args;
struct open_how;
struct mount_attr;
struct landlock_ruleset_attr;
struct lsm_ctx;
enum landlock_rule_type;
struct cachestat_range;
struct cachestat;
struct statmount;
struct mnt_id_req;

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

#ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
/*
 * It may be useful for an architecture to override the definitions of the
 * SYSCALL_DEFINE0() and __SYSCALL_DEFINEx() macros, in particular to use a
 * different calling convention for syscalls. To allow for that, the prototypes
 * for the sys_*() functions below will *not* be included if
 * CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
 */
#include <asm/syscall_wrapper.h>
#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */

/*
 * __MAP - apply a macro to syscall arguments
 * __MAP(n, m, t1, a1, t2, a2, ..., tn, an) will expand to
 *    m(t1, a1), m(t2, a2), ..., m(tn, an)
 * The first argument must be equal to the amount of type/name
 * pairs given.  Note that this list of pairs (i.e. the arguments
 * of __MAP starting at the third one) is in the same format as
 * for SYSCALL_DEFINE<n>/COMPAT_SYSCALL_DEFINE<n>
 */
#define __MAP0(m,...)
#define __MAP1(m,t,a,...) m(t,a)
#define __MAP2(m,t,a,...) m(t,a), __MAP1(m,__VA_ARGS__)
#define __MAP3(m,t,a,...) m(t,a), __MAP2(m,__VA_ARGS__)
#define __MAP4(m,t,a,...) m(t,a), __MAP3(m,__VA_ARGS__)
#define __MAP5(m,t,a,...) m(t,a), __MAP4(m,__VA_ARGS__)
#define __MAP6(m,t,a,...) m(t,a), __MAP5(m,__VA_ARGS__)
#define __MAP(n,...) __MAP##n(__VA_ARGS__)

#define __SC_DECL(t, a)	t a
#define __TYPE_AS(t, v)	__same_type((__force t)0, v)
#define __TYPE_IS_L(t)	(__TYPE_AS(t, 0L))
#define __TYPE_IS_UL(t)	(__TYPE_AS(t, 0UL))
#define __TYPE_IS_LL(t) (__TYPE_AS(t, 0LL) || __TYPE_AS(t, 0ULL))
#define __SC_LONG(t, a) __typeof(__builtin_choose_expr(__TYPE_IS_LL(t), 0LL, 0L)) a
#define __SC_CAST(t, a)	(__force t) a
#define __SC_TYPE(t, a)	t
#define __SC_ARGS(t, a)	a
#define __SC_TEST(t, a) (void)BUILD_BUG_ON_ZERO(!__TYPE_IS_LL(t) && sizeof(t) > sizeof(long))

#ifdef CONFIG_FTRACE_SYSCALLS
#define __SC_STR_ADECL(t, a)	#a
#define __SC_STR_TDECL(t, a)	#t

extern struct trace_event_class event_class_syscall_enter;
extern struct trace_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 trace_event_call __used				\
	  event_enter_##sname = {					\
		.class			= &event_clas