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| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2017-07-07 22:37:25 +0530 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-07-08 11:05:34 +0200 |
| commit | 0f73ff80b751b39ff539a550e65c5bd131ff0316 (patch) | |
| tree | 0497a4f43c3c6eb3d51afa4026524eb1b73db946 /kernel | |
| parent | 659b957f20c78fd470083c80af5e79eedfb39e5b (diff) | |
| download | linux-0f73ff80b751b39ff539a550e65c5bd131ff0316.tar.gz linux-0f73ff80b751b39ff539a550e65c5bd131ff0316.tar.bz2 linux-0f73ff80b751b39ff539a550e65c5bd131ff0316.zip | |
kprobes: Simplify register_jprobes()
Re-factor jprobe registration functions as the current version is
getting too unwieldy. Move the actual jprobe registration to
register_jprobe() and re-organize code accordingly.
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/089cae4bfe73767f765291ee0e6fb0c3d240e5f1.1499443367.git.naveen.n.rao@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/kprobes.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c index a519219169fd..db3cd3e60bdd 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -1771,24 +1771,13 @@ unsigned long __weak arch_deref_entry_point(void *entry) int register_jprobes(struct jprobe **jps, int num) { - struct jprobe *jp; int ret = 0, i; if (num <= 0) return -EINVAL; + for (i = 0; i < num; i++) { - unsigned long addr, offset; - jp = jps[i]; - addr = arch_deref_entry_point(jp->entry); - - /* Verify probepoint is a function entry point */ - if (kallsyms_lookup_size_offset(addr, NULL, &offset) && - offset == 0) { - jp->kp.pre_handler = setjmp_pre_handler; - jp->kp.break_handler = longjmp_break_handler; - ret = register_kprobe(&jp->kp); - } else - ret = -EINVAL; + ret = register_jprobe(jps[i]); if (ret < 0) { if (i > 0) @@ -1796,13 +1785,26 @@ int register_jprobes(struct jprobe **jps, int num) break; } } + return ret; } EXPORT_SYMBOL_GPL(register_jprobes); int register_jprobe(struct jprobe *jp) { - return register_jprobes(&jp, 1); + unsigned long addr, offset; + struct kprobe *kp = &jp->kp; + + /* Verify probepoint is a function entry point */ + addr = arch_deref_entry_point(jp->entry); + + if (kallsyms_lookup_size_offset(addr, NULL, &offset) && offset == 0) { + kp->pre_handler = setjmp_pre_handler; + kp->break_handler = longjmp_break_handler; + return register_kprobe(kp); + } + + return -EINVAL; } EXPORT_SYMBOL_GPL(register_jprobe); |