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 <stddef.h>
  14
  15 #include <asm/ptrace.h>
  16
  17 #include <lttng/events.h>
  18 #include <lttng/kernel-version.h>
  19
  20
  21 /*
  22  * Forward declarations for old kernels.
  23  */
  24 struct mmsghdr;
  25 struct rlimit64;
  26 struct oldold_utsname;
  27 struct old_utsname;
  28 struct sel_arg_struct;
  29 struct mmap_arg_struct;
  30 struct file_handle;
  31 struct user_msghdr;
  32
  33 /*
  34  * Forward declaration for kernels >= 5.6
  35  */
  36 struct timex;
  37 struct timeval;
  38 struct itimerval;
  39 struct itimerspec;
  40
  41 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
  42 typedef __kernel_old_time_t time_t;
  43 #endif
  44
  45 struct trace_syscall_entry {
  46         void *event_func;
  47         const struct lttng_kernel_event_desc *desc;
  48         const struct lttng_kernel_event_field **fields;
  49         unsigned int nrargs;
  50 };
  51
  52 struct trace_syscall_table {
  53         const struct trace_syscall_entry *table;
  54         const size_t len;
  55 };
  56
  57 extern
  58 void syscall_entry_event_probe(void *__data, struct pt_regs *regs, long id);
  59
  60 extern
  61 void syscall_exit_event_probe(void *__data, struct pt_regs *regs, long ret);
  62
  63 extern
  64 void syscall_entry_event_notifier_probe(void *__data, struct pt_regs *regs,
  65                 long id);
  66 extern
  67 void syscall_exit_event_notifier_probe(void *__data, struct pt_regs *regs,
  68                 long ret);
  69
  70 #endif /* LTTNG_SYSCALLS_H */