diff options
| author | Masami Hiramatsu <mhiramat@redhat.com> | 2009-09-10 19:53:14 -0400 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2009-09-10 22:18:58 -0400 |
| commit | 2fba0c8867af47f6455490e7b59e512dd180c027 (patch) | |
| tree | b842519b73f0bed32dfab5bcf9b066622f01ff96 /Documentation/trace | |
| parent | ad5cafcdb09c57008c990edd309c0a563b09f238 (diff) | |
tracing/kprobes: Fix probe offset to be unsigned
Prohibit user to specify negative offset from symbols.
Since kprobe.offset is unsigned int, the offset must be always positive
value.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <20090910235314.22412.64631.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'Documentation/trace')
| -rw-r--r-- | Documentation/trace/kprobetrace.txt | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/Documentation/trace/kprobetrace.txt b/Documentation/trace/kprobetrace.txt index 3de751747164..db5531865648 100644 --- a/Documentation/trace/kprobetrace.txt +++ b/Documentation/trace/kprobetrace.txt | |||
| @@ -25,15 +25,15 @@ probe events via /sys/kernel/debug/tracing/events/kprobes/<EVENT>/filter. | |||
| 25 | 25 | ||
| 26 | Synopsis of kprobe_events | 26 | Synopsis of kprobe_events |
| 27 | ------------------------- | 27 | ------------------------- |
| 28 | p[:EVENT] SYMBOL[+offs|-offs]|MEMADDR [FETCHARGS] : Set a probe | 28 | p[:EVENT] SYMBOL[+offs]|MEMADDR [FETCHARGS] : Set a probe |
| 29 | r[:EVENT] SYMBOL[+0] [FETCHARGS] : Set a return probe | 29 | r[:EVENT] SYMBOL[+0] [FETCHARGS] : Set a return probe |
| 30 | 30 | ||
| 31 | EVENT : Event name. If omitted, the event name is generated | 31 | EVENT : Event name. If omitted, the event name is generated |
| 32 | based on SYMBOL+offs or MEMADDR. | 32 | based on SYMBOL+offs or MEMADDR. |
| 33 | SYMBOL[+offs|-offs] : Symbol+offset where the probe is inserted. | 33 | SYMBOL[+offs] : Symbol+offset where the probe is inserted. |
| 34 | MEMADDR : Address where the probe is inserted. | 34 | MEMADDR : Address where the probe is inserted. |
| 35 | 35 | ||
| 36 | FETCHARGS : Arguments. Each probe can have up to 128 args. | 36 | FETCHARGS : Arguments. Each probe can have up to 128 args. |
| 37 | %REG : Fetch register REG | 37 | %REG : Fetch register REG |
| 38 | sN : Fetch Nth entry of stack (N >= 0) | 38 | sN : Fetch Nth entry of stack (N >= 0) |
| 39 | sa : Fetch stack address. | 39 | sa : Fetch stack address. |