[Qemu-devel] [PATCH v1 2/2] gdbstub: don't fail on vCont; C04:0; c packets

["Alex Bennée" <alex.bennee@linaro.org>]

The thread-id of 0 means any CPU but we then ignore the fact we find
the first_cpu in this case who can have an index of 0. Instead of
bailing out just test if we have managed to match up thread-id to a
CPU.

Otherwise you get:
  gdb_handle_packet: command='vCont;C04:0;c'
  put_packet: reply='E22'

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 gdbstub.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gdbstub.c b/gdbstub.c
index a249846954..29c9ed3002 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -934,8 +934,8 @@ static int gdb_handle_vcont(GDBState *s, const char *p)
              * CPU first, and only then we can use its index.
              */
             cpu = find_cpu(idx);
-            /* invalid CPU/thread specified */
-            if (!idx || !cpu) {
+            /* invalid thread specified, cpu not found. */
+            if (!cpu) {
                 res = -EINVAL;
                 goto out;
             }
-- 
2.13.0