src/lttng-syscalls-entry-table.c

   1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
   2  *
   3  * lttng-syscalls-entry-table.c
   4  *
   5  * LTTng syscall entry probes.
   6  *
   7  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  * Copyright (C) 2021 Francis Deslauriers <francis.deslauriers@efficios.com>
   9  */
  10
  11 #include <wrapper/tracepoint.h>
  12
  13 #include "lttng-syscalls.h"
  14
  15
  16 #ifdef IA32_NR_syscalls
  17 #define NR_compat_syscalls IA32_NR_syscalls
  18 #else
  19 #define NR_compat_syscalls NR_syscalls
  20 #endif
  21
  22 /*
  23  * Create LTTng tracepoint probes.
  24  */
  25 #define LTTNG_PACKAGE_BUILD
  26 #define CREATE_TRACE_POINTS
  27 #define TP_MODULE_NOINIT
  28 #define TRACE_INCLUDE_PATH instrumentation/syscalls/headers
  29
  30 #define PARAMS(args...) args
  31
  32 #define SC_ENTER
  33
  34 #undef sc_exit
  35 #define sc_exit(...)
  36 #undef sc_in
  37 #define sc_in(...)      __VA_ARGS__
  38 #undef sc_out
  39 #define sc_out(...)
  40 #undef sc_inout
  41 #define sc_inout(...)   __VA_ARGS__
  42
  43 #define LTTNG_TRACEPOINT_TYPE_EXTERN
  44
  45 #include <lttng/events-reset.h>
  46
  47 /* Hijack probe callback for system call enter */
  48 #undef TP_PROBE_CB
  49 #define TP_PROBE_CB(_template)          &syscall_entry_event_probe
  50 #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \
  51         LTTNG_TRACEPOINT_EVENT(syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \
  52                 PARAMS(_fields))
  53 #define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
  54         LTTNG_TRACEPOINT_EVENT_CODE(syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \
  55                 PARAMS(_locvar), PARAMS(_code_pre),                             \
  56                 PARAMS(_fields), PARAMS(_code_post))
  57 #define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \
  58         LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(syscall_entry_##_name, PARAMS(_fields))
  59 #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name)             \
  60         LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(syscall_entry_##_template, syscall_entry_##_name)
  61
  62 #define SC_LTTNG_TRACEPOINT_ENUM(_name, _values) \
  63         LTTNG_TRACEPOINT_ENUM(_name, PARAMS(_values))
  64 #undef TRACE_SYSTEM
  65 #define TRACE_SYSTEM syscall_entry_integers
  66 #define TRACE_INCLUDE_FILE syscalls_integers
  67 #include <instrumentation/syscalls/headers/syscalls_integers.h>
  68 #undef TRACE_INCLUDE_FILE
  69 #undef TRACE_SYSTEM
  70 #define TRACE_SYSTEM syscall_entry_pointers
  71 #define TRACE_INCLUDE_FILE syscalls_pointers
  72 #include <instrumentation/syscalls/headers/syscalls_pointers.h>
  73 #undef TRACE_INCLUDE_FILE
  74 #undef TRACE_SYSTEM
  75 #undef SC_LTTNG_TRACEPOINT_ENUM
  76 #undef SC_LTTNG_TRACEPOINT_EVENT_CODE
  77 #undef SC_LTTNG_TRACEPOINT_EVENT
  78 #undef SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS
  79 #undef SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS
  80 #undef TP_PROBE_CB
  81 #undef _TRACE_SYSCALLS_INTEGERS_H
  82 #undef _TRACE_SYSCALLS_POINTERS_H
  83
  84 #define CREATE_SYSCALL_TABLE
  85
  86 #undef sc_exit
  87 #define sc_exit(...)
  88
  89 #undef TRACE_SYSCALL_TABLE
  90 #define TRACE_SYSCALL_TABLE(_template, _name, _nr, _nrargs)     \
  91         [ _nr ] = {                                             \
  92                 .event_func = __event_probe__syscall_entry_##_template, \
  93                 .nrargs = (_nrargs),                            \
  94                 .fields = __event_fields___syscall_entry_##_template, \
  95                 .desc = &__event_desc___syscall_entry_##_name,  \
  96         },
  97
  98 /* Event syscall enter tracing table */
  99 static const struct trace_syscall_entry _sc_table[] = {
 100 #include <instrumentation/syscalls/headers/syscalls_integers.h>
 101 #include <instrumentation/syscalls/headers/syscalls_pointers.h>
 102 };
 103
 104 const struct trace_syscall_table sc_table = {
 105         .table = _sc_table,
 106         .len = ARRAY_SIZE(_sc_table),
 107 };
 108
 109 #undef SC_ENTER
 110
 111 #undef CREATE_SYSCALL_TABLE