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kprobes: Remove the jprobes sample code

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Remove the jprobes sample module because jprobes are deprecated.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: David S . Miller <davem@davemloft.net>
Cc: Ian McDonald <ian.mcdonald@jandi.co.nz>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E . McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Link: http://lkml.kernel.org/r/150724535709.5014.7261513316230565780.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Masami Hiramatsu 2017-10-06 08:15:57 +09:00 committed by Ingo Molnar
parent 2c7d662e26
commit 9be95bdc53
2 changed files with 1 additions and 68 deletions
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2
samples/kprobes/Makefile
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@ -1,5 +1,5 @@
# builds the kprobes example kernel modules;
# then to use one (as root): insmod <module_name.ko>
obj-$(CONFIG_SAMPLE_KPROBES) += kprobe_example.o jprobe_example.o
obj-$(CONFIG_SAMPLE_KPROBES) += kprobe_example.o
obj-$(CONFIG_SAMPLE_KRETPROBES) += kretprobe_example.o

67
samples/kprobes/jprobe_example.c
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@ -1,67 +0,0 @@
/*
* Here's a sample kernel module showing the use of jprobes to dump
* the arguments of _do_fork().
*
* For more information on theory of operation of jprobes, see
* Documentation/kprobes.txt
*
* Build and insert the kernel module as done in the kprobe example.
* You will see the trace data in /var/log/messages and on the
* console whenever _do_fork() is invoked to create a new process.
* (Some messages may be suppressed if syslogd is configured to
* eliminate duplicate messages.)
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kprobes.h>
/*
* Jumper probe for _do_fork.
* Mirror principle enables access to arguments of the probed routine
* from the probe handler.
*/
/* Proxy routine having the same arguments as actual _do_fork() routine */
static long j_do_fork(unsigned long clone_flags, unsigned long stack_start,
unsigned long stack_size, int __user *parent_tidptr,
int __user *child_tidptr, unsigned long tls)
{
pr_info("jprobe: clone_flags = 0x%lx, stack_start = 0x%lx "
"stack_size = 0x%lx\n", clone_flags, stack_start, stack_size);
/* Always end with a call to jprobe_return(). */
jprobe_return();
return 0;
}
static struct jprobe my_jprobe = {
.entry = j_do_fork,
.kp = {
.symbol_name = "_do_fork",
},
};
static int __init jprobe_init(void)
{
int ret;
ret = register_jprobe(&my_jprobe);
if (ret < 0) {
pr_err("register_jprobe failed, returned %d\n", ret);
return -1;
}
pr_info("Planted jprobe at %p, handler addr %p\n",
my_jprobe.kp.addr, my_jprobe.entry);
return 0;
}
static void __exit jprobe_exit(void)
{
unregister_jprobe(&my_jprobe);
pr_info("jprobe at %p unregistered\n", my_jprobe.kp.addr);
}
module_init(jprobe_init)
module_exit(jprobe_exit)
MODULE_LICENSE("GPL");