src/lttng-syscalls.h

   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 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,13,0))
  25 #include <linux/landlock.h>
  26 #else
  27 struct landlock_ruleset_attr;
  28
  29 enum landlock_rule_type {
  30         LANDLOCK_RULE_PATH_BENEATH = 1,
  31 };
  32 #endif
  33
  34 /*
  35  * Forward declarations allowing LTTng to build its system call instrumentation
  36  * against old kernels which do not declare the more recent system call
  37  * argument structure types.
  38  */
  39 struct clone_args;
  40 struct file_handle;
  41 struct futex_waitv;
  42 struct io_uring_params;
  43 struct mmap_arg_struct;
  44 struct mmsghdr;
  45 struct mount_attr;
  46 struct oldold_utsname;
  47 struct old_utsname;
  48 struct old_itimerspec32;
  49 struct old_timespec32;
  50 struct old_timeval32;
  51 struct old_timex32;
  52 struct old_utimbuf32;
  53 struct open_how;
  54 struct rlimit64;
  55 struct rseq;
  56 struct sched_attr;
  57 struct sel_arg_struct;
  58 struct statx;
  59 struct user_msghdr;
  60
  61 struct __aio_sigset;
  62 struct __kernel_old_itimerval;
  63 struct __kernel_timespec;
  64 struct __kernel_timex;
  65 struct __kernel_old_timeval;
  66 struct __kernel_itimerspec;
  67
  68 union bpf_attr;
  69
  70 #ifndef __kernel_long_t
  71 typedef long __kernel_long_t;
  72 #endif
  73
  74 typedef __kernel_long_t __kernel_old_time_t;
  75 typedef int __bitwise __kernel_rwf_t;
  76 typedef __kernel_rwf_t rwf_t;
  77 typedef s32 old_time32_t;
  78
  79 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
  80 /*
  81  * Forward declaration and typedef for old types expected by MIPS and POWER
  82  * system call instrumentation when building against kernel >= 5.6.0. To be
  83  * removed after those system call instrumentation headers are regenerated
  84  * against a recent kernel.
  85  */
  86 typedef __kernel_old_time_t time_t;
  87
  88 struct itimerspec;
  89 struct itimerval;
  90 struct timeval;
  91 struct timex;
  92 #endif
  93
  94 struct trace_syscall_entry {
  95         void *event_func;
  96         const struct lttng_kernel_event_desc *desc;
  97         const struct lttng_kernel_event_field * const *fields;
  98         unsigned int nrargs;
  99 };
 100
 101 struct trace_syscall_table {
 102         const struct trace_syscall_entry *table;
 103         const size_t len;
 104 };
 105
 106 extern
 107 void syscall_entry_event_probe(void *__data, struct pt_regs *regs, long id);
 108
 109 extern
 110 void syscall_exit_event_probe(void *__data, struct pt_regs *regs, long ret);
 111
 112 extern
 113 void syscall_entry_event_notifier_probe(void *__data, struct pt_regs *regs,
 114                 long id);
 115 extern
 116 void syscall_exit_event_notifier_probe(void *__data, struct pt_regs *regs,
 117                 long ret);
 118
 119 #endif /* LTTNG_SYSCALLS_H */