[lttng-modules.git] / src / lttng-syscalls.h

/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
 *
 * lttng-syscalls.h
 *
 * LTTng syscall header.
 *
 * Copyright (C) 2021 Francis Deslauriers <francis.deslauriers@efficios.com>
 */

#ifndef LTTNG_SYSCALLS_H
#define LTTNG_SYSCALLS_H

#include <asm/ptrace.h>
#include <linux/compat.h>
#include <linux/fcntl.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/mman.h>
#include <linux/posix_types.h>

#include <lttng/events.h>
#include <lttng/kernel-version.h>

/*
 * Forward declarations allowing LTTng to build its system call instrumentation
 * against old kernels which do not declare the more recent system call
 * argument structure types.
 */
struct clone_args;
struct file_handle;
struct futex_waitv;
struct io_uring_params;
struct mmap_arg_struct;
struct mmsghdr;
struct mount_attr;
struct oldold_utsname;
struct old_utsname;
struct old_itimerspec32;
struct old_timespec32;
struct old_timeval32;
struct old_timex32;
struct old_utimbuf32;
struct open_how;
struct rlimit64;
struct rseq;
struct sched_attr;
struct sel_arg_struct;
struct statx;
struct user_msghdr;

struct __aio_sigset;
struct __kernel_old_itimerval;
struct __kernel_timespec;
struct __kernel_timex;
struct __kernel_old_timeval;
struct __kernel_itimerspec;

union bpf_attr;

#ifndef __kernel_long_t
typedef long __kernel_long_t;
#endif

typedef __kernel_long_t __kernel_old_time_t;
typedef int __bitwise __kernel_rwf_t;
typedef __kernel_rwf_t rwf_t;
typedef s32 old_time32_t;

#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
/*
 * Forward declaration and typedef for old types expected by MIPS and POWER
 * system call instrumentation when building against kernel >= 5.6.0. To be
 * removed after those system call instrumentation headers are regenerated
 * against a recent kernel.
 */
typedef __kernel_old_time_t time_t;

struct itimerspec;
struct itimerval;
struct timeval;
struct timex;
#endif

struct trace_syscall_entry {
	void *event_func;
	const struct lttng_kernel_event_desc *desc;
	const struct lttng_kernel_event_field * const *fields;
	unsigned int nrargs;
};

struct trace_syscall_table {
	const struct trace_syscall_entry *table;
	const size_t len;
};

extern
void syscall_entry_event_probe(void *__data, struct pt_regs *regs, long id);

extern
void syscall_exit_event_probe(void *__data, struct pt_regs *regs, long ret);

extern
void syscall_entry_event_notifier_probe(void *__data, struct pt_regs *regs,
		long id);
extern
void syscall_exit_event_notifier_probe(void *__data, struct pt_regs *regs,
		long ret);

#endif /* LTTNG_SYSCALLS_H */
Commit	Line	Data
e42c4f49 FD	1	/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
	2	*
	3	* lttng-syscalls.h
	4	*
	5	* LTTng syscall header.
	6	*
	7	* Copyright (C) 2021 Francis Deslauriers <francis.deslauriers@efficios.com>
	8	*/
	9
ebcc64cd FD	10	#ifndef LTTNG_SYSCALLS_H
	11	#define LTTNG_SYSCALLS_H
	12
e42c4f49	13	#include <asm/ptrace.h>
87ad3fdc FD	14	#include <linux/compat.h>
	15	#include <linux/fcntl.h>
	16	#include <linux/in.h>
	17	#include <linux/in6.h>
	18	#include <linux/mman.h>
d8539681	19	#include <linux/posix_types.h>
e42c4f49	20
ebcc64cd	21	#include <lttng/events.h>
e42c4f49 FD	22	#include <lttng/kernel-version.h>
e42c4f49 FD	23
e42c4f49	24	/*
d8539681 MD	25	* Forward declarations allowing LTTng to build its system call instrumentation
	26	* against old kernels which do not declare the more recent system call
	27	* argument structure types.
e42c4f49	28	*/
d8539681 MD	29	struct clone_args;
	30	struct file_handle;
	31	struct futex_waitv;
	32	struct io_uring_params;
	33	struct mmap_arg_struct;
e42c4f49	34	struct mmsghdr;
d8539681	35	struct mount_attr;
e42c4f49 FD	36	struct oldold_utsname;
e42c4f49 FD	37	struct old_utsname;
d8539681 MD	38	struct old_itimerspec32;
	39	struct old_timespec32;
	40	struct old_timeval32;
	41	struct old_timex32;
	42	struct old_utimbuf32;
	43	struct open_how;
	44	struct rlimit64;
	45	struct rseq;
b3ab2950	46	struct sched_attr;
e42c4f49	47	struct sel_arg_struct;
d8539681	48	struct statx;
e42c4f49	49	struct user_msghdr;
d8539681 MD	50
d8539681 MD	51	struct __aio_sigset;
7aedbe65	52	struct __kernel_old_itimerval;
d8539681 MD	53	struct __kernel_timespec;
	54	struct __kernel_timex;
	55	struct __kernel_old_timeval;
	56	struct __kernel_itimerspec;
e42c4f49	57
b3ab2950 MD	58	union bpf_attr;
	59
	60	#ifndef __kernel_long_t
	61	typedef long __kernel_long_t;
	62	#endif
	63
d8539681 MD	64	typedef __kernel_long_t __kernel_old_time_t;
	65	typedef int __bitwise __kernel_rwf_t;
	66	typedef __kernel_rwf_t rwf_t;
	67	typedef s32 old_time32_t;
e42c4f49 FD	68
e42c4f49 FD	69	#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
d8539681 MD	70	/*
	71	* Forward declaration and typedef for old types expected by MIPS and POWER
	72	* system call instrumentation when building against kernel >= 5.6.0. To be
	73	* removed after those system call instrumentation headers are regenerated
	74	* against a recent kernel.
	75	*/
e42c4f49	76	typedef __kernel_old_time_t time_t;
d8539681 MD	77
	78	struct itimerspec;
	79	struct itimerval;
	80	struct timeval;
	81	struct timex;
e42c4f49 FD	82	#endif
e42c4f49 FD	83
ebcc64cd FD	84	struct trace_syscall_entry {
	85	void *event_func;
	86	const struct lttng_kernel_event_desc *desc;
4f1d1ee5	87	const struct lttng_kernel_event_field * const *fields;
ebcc64cd FD	88	unsigned int nrargs;
	89	};
	90
	91	struct trace_syscall_table {
	92	const struct trace_syscall_entry *table;
	93	const size_t len;
	94	};
e42c4f49 FD	95
	96	extern
	97	void syscall_entry_event_probe(void __data, struct pt_regs regs, long id);
	98
	99	extern
	100	void syscall_exit_event_probe(void __data, struct pt_regs regs, long ret);
	101
	102	extern
	103	void syscall_entry_event_notifier_probe(void __data, struct pt_regs regs,
	104	long id);
	105	extern
	106	void syscall_exit_event_notifier_probe(void __data, struct pt_regs regs,
	107	long ret);
	108
ebcc64cd	109	#endif /* LTTNG_SYSCALLS_H */