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5fee13fd | 1 | /* |
886d51a3 MD |
2 | * lttng-syscalls-extractor.c |
3 | * | |
4 | * Dump syscall metadata to console. | |
5 | * | |
5fee13fd MD |
6 | * Copyright 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
7 | * Copyright 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
8 | * | |
886d51a3 MD |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
5fee13fd | 18 | * |
886d51a3 MD |
19 | * You should have received a copy of the GNU General Public License along |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
5fee13fd MD |
22 | */ |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/list.h> | |
28 | #include <linux/err.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/kallsyms.h> | |
31 | #include <linux/dcache.h> | |
32 | #include <linux/ftrace_event.h> | |
33 | #include <trace/syscall.h> | |
7801e9f4 | 34 | #include <asm/syscall.h> |
5fee13fd MD |
35 | |
36 | #ifndef CONFIG_FTRACE_SYSCALLS | |
37 | #error "You need to set CONFIG_FTRACE_SYSCALLS=y" | |
38 | #endif | |
39 | ||
bc55cda3 MD |
40 | #ifndef CONFIG_KALLSYMS_ALL |
41 | #error "You need to set CONFIG_KALLSYMS_ALL=y" | |
42 | #endif | |
43 | ||
5fee13fd MD |
44 | static struct syscall_metadata **__start_syscalls_metadata; |
45 | static struct syscall_metadata **__stop_syscalls_metadata; | |
46 | ||
47 | static __init | |
48 | struct syscall_metadata *find_syscall_meta(unsigned long syscall) | |
49 | { | |
50 | struct syscall_metadata **iter; | |
51 | ||
52 | for (iter = __start_syscalls_metadata; | |
53 | iter < __stop_syscalls_metadata; iter++) { | |
54 | if ((*iter)->syscall_nr == syscall) | |
55 | return (*iter); | |
56 | } | |
57 | return NULL; | |
58 | } | |
59 | ||
60 | int init_module(void) | |
61 | { | |
62 | struct syscall_metadata *meta; | |
63 | int i; | |
64 | ||
65 | __start_syscalls_metadata = (void *) kallsyms_lookup_name("__start_syscalls_metadata"); | |
66 | __stop_syscalls_metadata = (void *) kallsyms_lookup_name("__stop_syscalls_metadata"); | |
67 | ||
68 | for (i = 0; i < NR_syscalls; i++) { | |
69 | int j; | |
70 | ||
71 | meta = find_syscall_meta(i); | |
72 | if (!meta) | |
73 | continue; | |
74 | printk("syscall %s nr %d nbargs %d ", | |
75 | meta->name, meta->syscall_nr, meta->nb_args); | |
76 | printk("types: ("); | |
77 | for (j = 0; j < meta->nb_args; j++) { | |
78 | if (j > 0) | |
79 | printk(", "); | |
80 | printk("%s", meta->types[j]); | |
81 | } | |
82 | printk(") "); | |
83 | printk("args: ("); | |
84 | for (j = 0; j < meta->nb_args; j++) { | |
85 | if (j > 0) | |
86 | printk(", "); | |
87 | printk("%s", meta->args[j]); | |
88 | } | |
89 | printk(")\n"); | |
90 | } | |
91 | printk("SUCCESS\n"); | |
92 | ||
93 | return -1; | |
94 | } | |
95 | ||
96 | void cleanup_module(void) | |
97 | { | |
98 | } | |
99 | ||
100 | MODULE_LICENSE("GPL"); |