[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 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;

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
	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
	10	#ifndef LTTNG_SYSCALLS_H
	11	#define LTTNG_SYSCALLS_H
	12
	13	#include <asm/ptrace.h>
	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>
	19	#include <linux/posix_types.h>
	20
	21	#include <lttng/events.h>
	22	#include <lttng/kernel-version.h>
	23
	24	/*
	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.
	28	*/
	29	struct clone_args;
	30	struct file_handle;
	31	struct futex_waitv;
	32	struct io_uring_params;
	33	struct mmap_arg_struct;
	34	struct mmsghdr;
	35	struct mount_attr;
	36	struct oldold_utsname;
	37	struct old_utsname;
	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;
	46	struct sel_arg_struct;
	47	struct statx;
	48	struct user_msghdr;
	49
	50	struct __aio_sigset;
	51	struct __kernel_old_itimerval;
	52	struct __kernel_timespec;
	53	struct __kernel_timex;
	54	struct __kernel_old_timeval;
	55	struct __kernel_itimerspec;
	56
	57	typedef __kernel_long_t __kernel_old_time_t;
	58	typedef int __bitwise __kernel_rwf_t;
	59	typedef __kernel_rwf_t rwf_t;
	60	typedef s32 old_time32_t;
	61
	62	#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
	63	/*
	64	* Forward declaration and typedef for old types expected by MIPS and POWER
	65	* system call instrumentation when building against kernel >= 5.6.0. To be
	66	* removed after those system call instrumentation headers are regenerated
	67	* against a recent kernel.
	68	*/
	69	typedef __kernel_old_time_t time_t;
	70
	71	struct itimerspec;
	72	struct itimerval;
	73	struct timeval;
	74	struct timex;
	75	#endif
	76
	77	struct trace_syscall_entry {
	78	void *event_func;
	79	const struct lttng_kernel_event_desc *desc;
	80	const struct lttng_kernel_event_field * const *fields;
	81	unsigned int nrargs;
	82	};
	83
	84	struct trace_syscall_table {
	85	const struct trace_syscall_entry *table;
	86	const size_t len;
	87	};
	88
	89	extern
	90	void syscall_entry_event_probe(void __data, struct pt_regs regs, long id);
	91
	92	extern
	93	void syscall_exit_event_probe(void __data, struct pt_regs regs, long ret);
	94
	95	extern
	96	void syscall_entry_event_notifier_probe(void __data, struct pt_regs regs,
	97	long id);
	98	extern
	99	void syscall_exit_event_notifier_probe(void __data, struct pt_regs regs,
	100	long ret);
	101
	102	#endif /* LTTNG_SYSCALLS_H */