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2faf7d1b MD |
1 | /* |
2 | * lttng-compat-syscalls.c | |
3 | * | |
4 | * Copyright 2010-2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5 | * | |
6 | * LTTng compat syscall probes. | |
7 | * | |
8 | * Dual LGPL v2.1/GPL v2 license. | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/compat.h> | |
14 | #include <asm/ptrace.h> | |
15 | #include <asm/syscall.h> | |
16 | ||
17 | #include "ltt-events.h" | |
18 | ||
19 | extern | |
20 | void syscall_entry_probe(void *__data, struct pt_regs *regs, long id); | |
21 | ||
22 | /* | |
23 | * Take care of NOARGS not supported by mainline. | |
24 | */ | |
25 | #define DECLARE_EVENT_CLASS_NOARGS(name, tstruct, assign, print) | |
26 | #define DEFINE_EVENT_NOARGS(template, name) | |
27 | #define TRACE_EVENT_NOARGS(name, struct, assign, print) | |
28 | ||
29 | /* | |
30 | * Create LTTng tracepoint probes. | |
31 | */ | |
32 | #define LTTNG_PACKAGE_BUILD | |
33 | #define CREATE_TRACE_POINTS | |
34 | #define TP_MODULE_OVERRIDE | |
35 | #define TRACE_INCLUDE_PATH ../instrumentation/syscalls/headers | |
36 | ||
37 | /* Hijack probe callback for system calls */ | |
38 | #define TP_PROBE_CB(_template) &syscall_entry_probe | |
39 | #include "instrumentation/syscalls/headers/compat_syscalls_integers.h" | |
40 | #include "instrumentation/syscalls/headers/compat_syscalls_pointers.h" | |
41 | #undef TP_PROBE_CB | |
42 | ||
43 | #undef TP_MODULE_OVERRIDE | |
44 | #undef LTTNG_PACKAGE_BUILD | |
45 | #undef CREATE_TRACE_POINTS | |
46 | ||
47 | #undef TRACE_SYSCALL_TABLE | |
48 | #define TRACE_SYSCALL_TABLE(_template, _name, _nr, _nrargs) \ | |
49 | [ _nr ] = { \ | |
50 | .func = __event_probe__##_template, \ | |
51 | .nrargs = (_nrargs), \ | |
52 | .fields = __event_fields___##_template, \ | |
53 | .desc = &__event_desc___##_name, \ | |
54 | }, | |
55 | ||
56 | #define CREATE_SYSCALL_TABLE | |
57 | ||
58 | /* Create compatibility syscall table */ | |
59 | const struct trace_syscall_entry compat_sc_table[] = { | |
60 | #include "instrumentation/syscalls/headers/compat_syscalls_integers.h" | |
61 | #include "instrumentation/syscalls/headers/compat_syscalls_pointers.h" | |
62 | }; | |
63 | const size_t compat_sc_table_len = ARRAY_SIZE(compat_sc_table); | |
64 | ||
65 | #undef CREATE_SYSCALL_TABLE |