src/lttng-syscalls-entry-compat-table.c

   1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
   2  *
   3  * lttng-syscalls-entry-compat-table.c
   4  *
   5  * LTTng syscall entry compat 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 LTTNG_SC_COMPAT
  51 #define SC_LTTNG_TRACEPOINT_EVENT(_name, _proto, _args, _fields) \
  52         LTTNG_TRACEPOINT_EVENT(compat_syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \
  53                 PARAMS(_fields))
  54 #define SC_LTTNG_TRACEPOINT_EVENT_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \
  55         LTTNG_TRACEPOINT_EVENT_CODE(compat_syscall_entry_##_name, PARAMS(_proto), PARAMS(_args), \
  56                 PARAMS(_locvar), PARAMS(_code_pre),                             \
  57                 PARAMS(_fields), PARAMS(_code_post))
  58 #define SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \
  59         LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(compat_syscall_entry_##_name, PARAMS(_fields))
  60 #define SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name)             \
  61         LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(compat_syscall_entry_##_template, compat_syscall_entry_##_name)
  62
  63 #define SC_LTTNG_TRACEPOINT_ENUM(_name, _values) \
  64         LTTNG_TRACEPOINT_ENUM(_name, PARAMS(_values))
  65 #undef TRACE_SYSTEM
  66 #define TRACE_SYSTEM compat_syscall_entry_integers
  67 #define TRACE_INCLUDE_FILE compat_syscalls_integers
  68 #include <instrumentation/syscalls/headers/syscalls_integers.h>
  69 #undef TRACE_INCLUDE_FILE
  70 #undef TRACE_SYSTEM
  71 #define TRACE_SYSTEM compat_syscall_entry_pointers
  72 #define TRACE_INCLUDE_FILE compat_syscalls_pointers
  73 #include <instrumentation/syscalls/headers/syscalls_pointers.h>
  74 #undef TRACE_INCLUDE_FILE
  75 #undef TRACE_SYSTEM
  76 #undef SC_LTTNG_TRACEPOINT_ENUM
  77 #undef SC_LTTNG_TRACEPOINT_EVENT_CODE
  78 #undef SC_LTTNG_TRACEPOINT_EVENT
  79 #undef SC_LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS
  80 #undef SC_LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS
  81 #undef TP_PROBE_CB
  82
  83 #undef _TRACE_SYSCALLS_INTEGERS_H
  84 #undef _TRACE_SYSCALLS_POINTERS_H
  85 #undef LTTNG_SC_COMPAT
  86
  87 #define CREATE_SYSCALL_TABLE
  88
  89 #undef sc_exit
  90 #define sc_exit(...)
  91
  92 #undef TRACE_SYSCALL_TABLE
  93 #define TRACE_SYSCALL_TABLE(_template, _name, _nr, _nrargs)     \
  94         [ _nr ] = {                                             \
  95                 .event_func = __event_probe__compat_syscall_entry_##_template, \
  96                 .nrargs = (_nrargs),                            \
  97                 .fields = __event_fields___compat_syscall_entry_##_template, \
  98                 .desc = &__event_desc___compat_syscall_entry_##_name, \
  99         },
 100
 101 /* Event compat syscall enter table */
 102 const struct trace_syscall_entry _compat_sc_table[] = {
 103 #include <instrumentation/syscalls/headers/compat_syscalls_integers.h>
 104 #include <instrumentation/syscalls/headers/compat_syscalls_pointers.h>
 105 };
 106
 107 const struct trace_syscall_table compat_sc_table = {
 108         .table = _compat_sc_table,
 109         .len = ARRAY_SIZE(_compat_sc_table),
 110 };
 111
 112 #undef SC_ENTER
 113
 114 #undef CREATE_SYSCALL_TABLE