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| author | Namhyung Kim <namhyung.kim@lge.com> | 2013-11-25 05:42:47 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2014-01-03 02:57:05 +0100 |
| commit | b7e0bf341f6cfa92ae0a0e3d0c3496729595e1e9 (patch) | |
| tree | 0831ae7ab363f3789c5cb14bbf4973bfe17287bc /kernel/trace/trace_kprobe.c | |
| parent | uprobes: Allocate ->utask before handler_chain() for tracing handlers (diff) | |
| download | linux-b7e0bf341f6cfa92ae0a0e3d0c3496729595e1e9.tar.xz linux-b7e0bf341f6cfa92ae0a0e3d0c3496729595e1e9.zip | |
tracing/uprobes: Add @+file_offset fetch method
Enable to fetch data from a file offset. Currently it only supports
fetching from same binary uprobe set. It'll translate the file offset
to a proper virtual address in the process.
The syntax is "@+OFFSET" as it does similar to normal memory fetching
(@ADDR) which does no address translation.
Suggested-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'kernel/trace/trace_kprobe.c')
| -rw-r--r-- | kernel/trace/trace_kprobe.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index f94a56915e69..ce0ed8afb77e 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -239,6 +239,14 @@ DEFINE_BASIC_FETCH_FUNCS(symbol) DEFINE_FETCH_symbol(string) DEFINE_FETCH_symbol(string_size) +/* kprobes don't support file_offset fetch methods */ +#define fetch_file_offset_u8 NULL +#define fetch_file_offset_u16 NULL +#define fetch_file_offset_u32 NULL +#define fetch_file_offset_u64 NULL +#define fetch_file_offset_string NULL +#define fetch_file_offset_string_size NULL + /* Fetch type information table */ const struct fetch_type kprobes_fetch_type_table[] = { /* Special types */ |