From: Huang Shijie <shijie.huang@xxxxxxx> Subject: samples/kprobes: add a new module parameter Add a new module parameter which can be used as the symbol name. Without this patch, we can only test the "_do_fork" function with this kernel module. With this patch, the module becomes more flexible; we can test any functions with this module with # insmod kprobe_example.ko symbol="xxx" Link: http://lkml.kernel.org/r/1463535417-29637-1-git-send-email-shijie.huang@xxxxxxx Signed-off-by: Huang Shijie <shijie.huang@xxxxxxx> Cc: Petr Mladek <pmladek@xxxxxxxx> Cc: Steve Capper <steve.capper@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- samples/kprobes/kprobe_example.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff -puN samples/kprobes/kprobe_example.c~kprobes-add-a-new-module-parameter samples/kprobes/kprobe_example.c --- a/samples/kprobes/kprobe_example.c~kprobes-add-a-new-module-parameter +++ a/samples/kprobes/kprobe_example.c @@ -14,9 +14,13 @@ #include <linux/module.h> #include <linux/kprobes.h> +#define MAX_SYMBOL_LEN 64 +static char symbol[MAX_SYMBOL_LEN] = "_do_fork"; +module_param_string(symbol, symbol, sizeof(symbol), 0644); + /* For each probe you need to allocate a kprobe structure */ static struct kprobe kp = { - .symbol_name = "_do_fork", + .symbol_name = symbol, }; /* kprobe pre_handler: called just before the probed instruction is executed */ _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
