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 /*
  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 sched_attr;
  47 struct sel_arg_struct;
  48 struct statx;
  49 struct user_msghdr;
  50
  51 struct __aio_sigset;
  52 struct __kernel_old_itimerval;
  53 struct __kernel_timespec;
  54 struct __kernel_timex;
  55 struct __kernel_old_timeval;
  56 struct __kernel_itimerspec;
  57
  58 union bpf_attr;
  59
  60 #ifndef __kernel_long_t
  61 typedef long __kernel_long_t;
  62 #endif
  63
  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;
  68
  69 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
  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  */
  76 typedef __kernel_old_time_t time_t;
  77
  78 struct itimerspec;
  79 struct itimerval;
  80 struct timeval;
  81 struct timex;
  82 #endif
  83
  84 struct trace_syscall_entry {
  85         void *event_func;
  86         const struct lttng_kernel_event_desc *desc;
  87         const struct lttng_kernel_event_field * const *fields;
  88         unsigned int nrargs;
  89 };
  90
  91 struct trace_syscall_table {
  92         const struct trace_syscall_entry *table;
  93         const size_t len;
  94 };
  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
 109 #endif /* LTTNG_SYSCALLS_H */