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