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tracing/kprobes: Move common functions to trace_probe.h
The __get_data_size() and store_trace_args() will be used by uprobes too. Move them to a common location. 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>
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14577c3992
commit
2dc1018372
2 changed files with 48 additions and 48 deletions
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@ -740,54 +740,6 @@ static const struct file_operations kprobe_profile_ops = {
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.release = seq_release,
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};
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/* Sum up total data length for dynamic arraies (strings) */
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static __kprobes int __get_data_size(struct trace_probe *tp,
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struct pt_regs *regs)
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{
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int i, ret = 0;
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u32 len;
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for (i = 0; i < tp->nr_args; i++)
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if (unlikely(tp->args[i].fetch_size.fn)) {
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call_fetch(&tp->args[i].fetch_size, regs, &len);
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ret += len;
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}
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return ret;
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}
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/* Store the value of each argument */
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static __kprobes void store_trace_args(int ent_size, struct trace_probe *tp,
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struct pt_regs *regs,
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u8 *data, int maxlen)
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{
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int i;
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u32 end = tp->size;
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u32 *dl; /* Data (relative) location */
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for (i = 0; i < tp->nr_args; i++) {
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if (unlikely(tp->args[i].fetch_size.fn)) {
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/*
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* First, we set the relative location and
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* maximum data length to *dl
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*/
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dl = (u32 *)(data + tp->args[i].offset);
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*dl = make_data_rloc(maxlen, end - tp->args[i].offset);
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/* Then try to fetch string or dynamic array data */
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call_fetch(&tp->args[i].fetch, regs, dl);
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/* Reduce maximum length */
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end += get_rloc_len(*dl);
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maxlen -= get_rloc_len(*dl);
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/* Trick here, convert data_rloc to data_loc */
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*dl = convert_rloc_to_loc(*dl,
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ent_size + tp->args[i].offset);
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} else
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/* Just fetching data normally */
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call_fetch(&tp->args[i].fetch, regs,
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data + tp->args[i].offset);
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}
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}
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/* Kprobe handler */
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static __kprobes void
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__kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs,
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@ -178,3 +178,51 @@ extern ssize_t traceprobe_probes_write(struct file *file,
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int (*createfn)(int, char**));
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extern int traceprobe_command(const char *buf, int (*createfn)(int, char**));
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/* Sum up total data length for dynamic arraies (strings) */
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static inline __kprobes int
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__get_data_size(struct trace_probe *tp, struct pt_regs *regs)
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{
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int i, ret = 0;
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u32 len;
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for (i = 0; i < tp->nr_args; i++)
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if (unlikely(tp->args[i].fetch_size.fn)) {
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call_fetch(&tp->args[i].fetch_size, regs, &len);
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ret += len;
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}
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return ret;
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}
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/* Store the value of each argument */
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static inline __kprobes void
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store_trace_args(int ent_size, struct trace_probe *tp, struct pt_regs *regs,
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u8 *data, int maxlen)
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{
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int i;
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u32 end = tp->size;
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u32 *dl; /* Data (relative) location */
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for (i = 0; i < tp->nr_args; i++) {
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if (unlikely(tp->args[i].fetch_size.fn)) {
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/*
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* First, we set the relative location and
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* maximum data length to *dl
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*/
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dl = (u32 *)(data + tp->args[i].offset);
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*dl = make_data_rloc(maxlen, end - tp->args[i].offset);
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/* Then try to fetch string or dynamic array data */
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call_fetch(&tp->args[i].fetch, regs, dl);
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/* Reduce maximum length */
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end += get_rloc_len(*dl);
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maxlen -= get_rloc_len(*dl);
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/* Trick here, convert data_rloc to data_loc */
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*dl = convert_rloc_to_loc(*dl,
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ent_size + tp->args[i].offset);
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} else
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/* Just fetching data normally */
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call_fetch(&tp->args[i].fetch, regs,
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data + tp->args[i].offset);
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}
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}
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