parse-events: Allow expressions in __print_symbolic() fields

The __print_symbolic() function takes a sequence of key-value pairs for
pretty-printing a constant.  The new kvm:kvm_exit print fmt uses the
expression:

  __print_symbolic(..., { 0x040 + 1, "DB excp" }, ...)

Currently only atoms are supported and this print fmt fails to parse.
This patch adds support for expressions instead of just atoms so that
0x040 + 1 is parsed successfully.

Link: http://lkml.kernel.org/r/1315131959-7452-1-git-send-email-stefanha@linux.vnet.ibm.com

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Cc: Avi Kivity <avi@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/parse-events.c b/parse-events.c
index 2461814..f8ba6a5 100644
--- a/parse-events.c
+++ b/parse-events.c
@@ -2110,6 +2110,13 @@ process_fields(struct event_format *event, struct print_flag_sym **list, char **
 
                 free_token(token);
                 type = process_arg(event, arg, &token);
+
+                if (type == EVENT_OP)
+                        type = process_op(event, arg, &token);
+
+                if (type == EVENT_ERROR)
+                        goto out_free;
+
                 if (test_type_token(type, token, EVENT_DELIM, ","))
                         goto out_free;