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5fee13fd MD |
1 | /* |
2 | * Copyright 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
3 | * Copyright 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
4 | * | |
5 | * Dump syscall metadata to console. | |
6 | * | |
7 | * GPLv2 license. | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/types.h> | |
13 | #include <linux/list.h> | |
14 | #include <linux/err.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/kallsyms.h> | |
17 | #include <linux/dcache.h> | |
18 | #include <linux/ftrace_event.h> | |
19 | #include <trace/syscall.h> | |
20 | ||
21 | #ifndef CONFIG_FTRACE_SYSCALLS | |
22 | #error "You need to set CONFIG_FTRACE_SYSCALLS=y" | |
23 | #endif | |
24 | ||
25 | static struct syscall_metadata **__start_syscalls_metadata; | |
26 | static struct syscall_metadata **__stop_syscalls_metadata; | |
27 | ||
28 | static __init | |
29 | struct syscall_metadata *find_syscall_meta(unsigned long syscall) | |
30 | { | |
31 | struct syscall_metadata **iter; | |
32 | ||
33 | for (iter = __start_syscalls_metadata; | |
34 | iter < __stop_syscalls_metadata; iter++) { | |
35 | if ((*iter)->syscall_nr == syscall) | |
36 | return (*iter); | |
37 | } | |
38 | return NULL; | |
39 | } | |
40 | ||
41 | int init_module(void) | |
42 | { | |
43 | struct syscall_metadata *meta; | |
44 | int i; | |
45 | ||
46 | __start_syscalls_metadata = (void *) kallsyms_lookup_name("__start_syscalls_metadata"); | |
47 | __stop_syscalls_metadata = (void *) kallsyms_lookup_name("__stop_syscalls_metadata"); | |
48 | ||
49 | for (i = 0; i < NR_syscalls; i++) { | |
50 | int j; | |
51 | ||
52 | meta = find_syscall_meta(i); | |
53 | if (!meta) | |
54 | continue; | |
55 | printk("syscall %s nr %d nbargs %d ", | |
56 | meta->name, meta->syscall_nr, meta->nb_args); | |
57 | printk("types: ("); | |
58 | for (j = 0; j < meta->nb_args; j++) { | |
59 | if (j > 0) | |
60 | printk(", "); | |
61 | printk("%s", meta->types[j]); | |
62 | } | |
63 | printk(") "); | |
64 | printk("args: ("); | |
65 | for (j = 0; j < meta->nb_args; j++) { | |
66 | if (j > 0) | |
67 | printk(", "); | |
68 | printk("%s", meta->args[j]); | |
69 | } | |
70 | printk(")\n"); | |
71 | } | |
72 | printk("SUCCESS\n"); | |
73 | ||
74 | return -1; | |
75 | } | |
76 | ||
77 | void cleanup_module(void) | |
78 | { | |
79 | } | |
80 | ||
81 | MODULE_LICENSE("GPL"); |