projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| 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"); |