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kprobes: Support NOKPROBE_SYMBOL() in modules

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Support NOKPROBE_SYMBOL() in modules. NOKPROBE_SYMBOL() records only symbol
address in "_kprobe_blacklist" section in the module.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200505134059.771170126@linutronix.de
This commit is contained in:
Masami Hiramatsu
2020-03-26 23:50:00 +09:00
committed by Thomas Gleixner
parent 1e6769b0ae
commit 16db6264c9
3 changed files with 22 additions and 0 deletions
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3
kernel/module.c
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@@ -3197,6 +3197,9 @@ static int find_module_sections(struct module *mod, struct load_info *info)
#ifdef CONFIG_KPROBES
mod->kprobes_text_start = section_objs(info, ".kprobes.text", 1,
&mod->kprobes_text_size);
mod->kprobe_blacklist = section_objs(info, "_kprobe_blacklist",
sizeof(unsigned long),
&mod->num_kprobe_blacklist);
#endif
mod->extable = section_objs(info, "__ex_table",
sizeof(*mod->extable), &mod->num_exentries);