-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
This simple patch adds a new file in /proc, listing every kprobe which
is currently registered in the kernel. This patch is checked against
kernel 2.6.10
- --- ./kernel/kprobes.c 2005-01-03 20:40:52.000000000 +0100
+++ ./kernel/kprobes.c 2005-01-10 15:19:17.000000000 +0100
@@ -32,6 +32,7 @@
#include <linux/spinlock.h>
#include <linux/hash.h>
#include <linux/init.h>
+#include <linux/kallsyms.h>
#include <linux/module.h>
#include <asm/cacheflush.h>
#include <asm/errno.h>
@@ -131,6 +132,70 @@
unregister_kprobe(&jp->kp);
}
+void get_kprobes_info(struct kprobe *k, char *p)
+{
+ int len = 0;
+ char *module, namebuf[KSYM_NAME_LEN+1];
+ const char *hook, *func;
+ unsigned long off, size, handler, addr = (unsigned long)k->addr;
+
+ if(k->pre_handler) {
+ handler = (unsigned long)k->pre_handler;
+ func = kallsyms_lookup(addr, &size, &off, &module, namebuf);
+ len += sprintf(p + len, "PRE 0x%lx(%s+%#lx)\t",
+ addr, func, off);
+ hook = kallsyms_lookup(handler, &size, &off, &module, namebuf);
+ len += sprintf(p + len, "0x%lx(%s)\t%s\n", handler, hook,
+ strlen(module) ? module : "[built-in]");
+ }
+ if(k->post_handler) {
+ handler = (unsigned long)k->pre_handler;
+ func = kallsyms_lookup(addr, &size, &off, &module, namebuf);
+ hook = kallsyms_lookup(handler, &size, &off, &module, namebuf);
+ len += sprintf(p + len, "POST\t0x%lx(%s)\t0x%lx(%s)\t%s\n",
+ handler, hook, addr, func,
+ strlen(module) ? module : "[built-in]");
+ }
+ if(k->fault_handler) {
+ handler = (unsigned long)k->pre_handler;
+ func = kallsyms_lookup(addr, &size, &off, &module, namebuf);
+ hook = kallsyms_lookup(handler, &size, &off, &module, namebuf);
+ len += sprintf(p + len, "FAULT\t0x%lx(%s)\t0x%lx(%s)\t%s\n",
+ handler, hook, addr, func,
+ strlen(module) ? module : "[built-in]");
+ }
+ if(k->break_handler) {
+ handler = (unsigned long)k->pre_handler;
+ func = kallsyms_lookup(addr, &size, &off, &module, namebuf);
+ hook = kallsyms_lookup(handler, &size, &off, &module, namebuf);
+ len += sprintf(p + len, "BREAK\t0x%lx(%s)\t0x%lx(%s)\t%s\n",
+ handler, hook, addr, func,
+ strlen(module) ? module : "[built-in]");
+ }
+}
+
+int get_kprobes_list(char *page)
+{
+
+ int i, len = 0;
+ struct hlist_head *head;
+ struct hlist_node *node;
+ struct kprobe *k;
+
+ spin_lock(&kprobe_lock);
+ for(i = 0; i < KPROBE_TABLE_SIZE; i++) {
+ head = &kprobe_table[i];
+ hlist_for_each(node, head) {
+ if((k = hlist_entry(node, struct kprobe, hlist))) {
+ get_kprobes_info(k, page + len);
+ len = strlen(page);
+ }
+ }
+ }
+ spin_unlock(&kprobe_lock);
+ return len;
+}
+
static int __init init_kprobes(void)
{
int i, err = 0;
- --- ./fs/proc/proc_misc.c 2005-01-03 20:40:44.000000000 +0100
+++ ./fs/proc/proc_misc.c 2005-01-09 23:50:32.000000000 +0100
@@ -66,6 +66,7 @@
extern int get_exec_domain_list(char *);
extern int get_dma_list(char *);
extern int get_locks_status (char *, char **, off_t, int);
+extern int get_kprobes_list(char *);
static int proc_calc_metrics(char *page, char **start, off_t off,
int count, int *eof, int len)
@@ -547,6 +548,15 @@
return proc_calc_metrics(page, start, off, count, eof, len);
}
+#ifdef CONFIG_KPROBES
+static int kprobes_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len = get_kprobes_list(page);
+ return proc_calc_metrics(page, start, off, count, eof, len);
+}
+#endif
+
#ifdef CONFIG_MAGIC_SYSRQ
/*
* writing 'C' to /proc/sysrq-trigger is like sysrq-C
@@ -601,6 +611,9 @@
{"cmdline", cmdline_read_proc},
{"locks", locks_read_proc},
{"execdomains", execdomains_read_proc},
+#ifdef CONFIG_KPROBES
+ {"kprobes", kprobes_read_proc},
+#endif
{NULL,}
};
for (p = simple_ones; p->name; p++)
Signed-off-by: Luca Falavigna <dktrkr...@gmail.com>
Regards,
Luca
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
iQEVAwUBQeKsghZrwl7j21nOAQLBsAf9GV9qIV00kCLuGRFckh5HEmRypl2WylZm
kCKcpttG1qaDmeD1Rxee6nDMT3zuOlooHjUJhMFXAA1u63oEp0j9BzjuaO+IF/PQ
WloKCDquY/nmHMj/C37b9xmdXAGrEpozXcRo1JLd/6SRDNybeCxZDaO5IjK0y5bH
NvWvdF86RokC2QujFyrX228M2wNbIKt9yFCpaWtOT723tezDdp2DLB/h3uTiY84i
pCLuG0xV8ccakSmJRAkC7qGy8pqJTAt7mY8JVdTxJN5XiDUorHEU/FaUNWLHD4xY
NheUG+AWtTy1ulrKEK3T7uK0UEmgpzSokafasFLqvtbtQX1+tdRe1Q==
=Tnde
-----END PGP SIGNATURE-----
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
