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
  20 #include <lttng/events.h>
  21 #include <lttng/kernel-version.h>
  22
  23
  24 /*
  25  * Forward declarations for old kernels.
  26  */
  27 struct mmsghdr;
  28 struct rlimit64;
  29 struct oldold_utsname;
  30 struct old_utsname;
  31 struct sel_arg_struct;
  32 struct mmap_arg_struct;
  33 struct file_handle;
  34 struct user_msghdr;
  35 struct __kernel_old_itimerval;
  36 struct open_how;
  37 struct mount_attr;
  38 struct futex_waitv;
  39
  40 /*
  41  * Forward declaration for kernels >= 5.6
  42  */
  43 struct timex;
  44 struct timeval;
  45 struct itimerval;
  46 struct itimerspec;
  47
  48 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
  49 typedef __kernel_old_time_t time_t;
  50 #endif
  51
  52 struct trace_syscall_entry {
  53         void *event_func;
  54         const struct lttng_kernel_event_desc *desc;
  55         const struct lttng_kernel_event_field * const *fields;
  56         unsigned int nrargs;
  57 };
  58
  59 struct trace_syscall_table {
  60         const struct trace_syscall_entry *table;
  61         const size_t len;
  62 };
  63
  64 extern
  65 void syscall_entry_event_probe(void *__data, struct pt_regs *regs, long id);
  66
  67 extern
  68 void syscall_exit_event_probe(void *__data, struct pt_regs *regs, long ret);
  69
  70 extern
  71 void syscall_entry_event_notifier_probe(void *__data, struct pt_regs *regs,
  72                 long id);
  73 extern
  74 void syscall_exit_event_notifier_probe(void *__data, struct pt_regs *regs,
  75                 long ret);
  76
  77 #endif /* LTTNG_SYSCALLS_H */