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9f36eaed MJ |
1 | /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) |
2 | * | |
886d51a3 MD |
3 | * lttng-syscalls-extractor.c |
4 | * | |
5 | * Dump syscall metadata to console. | |
6 | * | |
5fee13fd MD |
7 | * Copyright 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
8 | * Copyright 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
5fee13fd MD |
9 | */ |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/list.h> | |
15 | #include <linux/err.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/kallsyms.h> | |
18 | #include <linux/dcache.h> | |
19 | #include <linux/ftrace_event.h> | |
20 | #include <trace/syscall.h> | |
7801e9f4 | 21 | #include <asm/syscall.h> |
5fee13fd MD |
22 | |
23 | #ifndef CONFIG_FTRACE_SYSCALLS | |
24 | #error "You need to set CONFIG_FTRACE_SYSCALLS=y" | |
25 | #endif | |
26 | ||
bc55cda3 MD |
27 | #ifndef CONFIG_KALLSYMS_ALL |
28 | #error "You need to set CONFIG_KALLSYMS_ALL=y" | |
29 | #endif | |
30 | ||
5fee13fd MD |
31 | static struct syscall_metadata **__start_syscalls_metadata; |
32 | static struct syscall_metadata **__stop_syscalls_metadata; | |
33 | ||
34 | static __init | |
35 | struct syscall_metadata *find_syscall_meta(unsigned long syscall) | |
36 | { | |
37 | struct syscall_metadata **iter; | |
38 | ||
39 | for (iter = __start_syscalls_metadata; | |
40 | iter < __stop_syscalls_metadata; iter++) { | |
41 | if ((*iter)->syscall_nr == syscall) | |
42 | return (*iter); | |
43 | } | |
44 | return NULL; | |
45 | } | |
46 | ||
47 | int init_module(void) | |
48 | { | |
49 | struct syscall_metadata *meta; | |
50 | int i; | |
51 | ||
52 | __start_syscalls_metadata = (void *) kallsyms_lookup_name("__start_syscalls_metadata"); | |
53 | __stop_syscalls_metadata = (void *) kallsyms_lookup_name("__stop_syscalls_metadata"); | |
54 | ||
55 | for (i = 0; i < NR_syscalls; i++) { | |
56 | int j; | |
57 | ||
58 | meta = find_syscall_meta(i); | |
59 | if (!meta) | |
60 | continue; | |
61 | printk("syscall %s nr %d nbargs %d ", | |
62 | meta->name, meta->syscall_nr, meta->nb_args); | |
63 | printk("types: ("); | |
64 | for (j = 0; j < meta->nb_args; j++) { | |
65 | if (j > 0) | |
66 | printk(", "); | |
67 | printk("%s", meta->types[j]); | |
68 | } | |
69 | printk(") "); | |
70 | printk("args: ("); | |
71 | for (j = 0; j < meta->nb_args; j++) { | |
72 | if (j > 0) | |
73 | printk(", "); | |
74 | printk("%s", meta->args[j]); | |
75 | } | |
76 | printk(")\n"); | |
77 | } | |
78 | printk("SUCCESS\n"); | |
79 | ||
80 | return -1; | |
81 | } | |
82 | ||
83 | void cleanup_module(void) | |
84 | { | |
85 | } | |
86 | ||
87 | MODULE_LICENSE("GPL"); |