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Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/trace_probe.c21
1 files changed, 13 insertions, 8 deletions
diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c
index 850a88abd33b..dec657af363c 100644
--- a/kernel/trace/trace_probe.c
+++ b/kernel/trace/trace_probe.c
@@ -283,7 +283,14 @@ static int parse_probe_vars(char *arg, const struct fetch_type *t,
int ret = 0;
int len;
- if (strcmp(arg, "retval") == 0) {
+ if (flags & TPARG_FL_TPOINT) {
+ if (code->data)
+ return -EFAULT;
+ code->data = kstrdup(arg, GFP_KERNEL);
+ if (!code->data)
+ return -ENOMEM;
+ code->op = FETCH_OP_TP_ARG;
+ } else if (strcmp(arg, "retval") == 0) {
if (flags & TPARG_FL_RETURN) {
code->op = FETCH_OP_RETVAL;
} else {
@@ -323,13 +330,6 @@ static int parse_probe_vars(char *arg, const struct fetch_type *t,
code->op = FETCH_OP_ARG;
code->param = (unsigned int)param - 1;
#endif
- } else if (flags & TPARG_FL_TPOINT) {
- if (code->data)
- return -EFAULT;
- code->data = kstrdup(arg, GFP_KERNEL);
- if (!code->data)
- return -ENOMEM;
- code->op = FETCH_OP_TP_ARG;
} else
goto inval_var;
@@ -384,6 +384,11 @@ parse_probe_arg(char *arg, const struct fetch_type *type,
break;
case '%': /* named register */
+ if (flags & TPARG_FL_TPOINT) {
+ /* eprobes do not handle registers */
+ trace_probe_log_err(offs, BAD_VAR);
+ break;
+ }
ret = regs_query_register_offset(arg + 1);
if (ret >= 0) {
code->op = FETCH_OP_REG;