From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
qemu coroutine command results in following error output:
Python Exception <class 'gdb.error'> 'arch_prctl' has unknown return
type; cast the call to its declared return type: Error occurred in
Python command: 'arch_prctl' has unknown return type; cast the call to
its declared return type
Fix it by giving it what it wants: arch_prctl return type.
Information on the topic:
https://sourceware.org/gdb/onlinedocs/gdb/Calling.html
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20190206151425.105871-1-vsementsov@virtuozzo.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
scripts/qemugdb/coroutine.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/qemugdb/coroutine.py b/scripts/qemugdb/coroutine.py
index ab699794ab..81f811ac00 100644
--- a/scripts/qemugdb/coroutine.py
+++ b/scripts/qemugdb/coroutine.py
@@ -22,7 +22,7 @@ def get_fs_base():
pthread_self().'''
# %rsp - 120 is scratch space according to the SystemV ABI
old = gdb.parse_and_eval('*(uint64_t*)($rsp - 120)')
- gdb.execute('call arch_prctl(0x1003, $rsp - 120)', False, True)
+ gdb.execute('call (int)arch_prctl(0x1003, $rsp - 120)', False, True)
fs_base = gdb.parse_and_eval('*(uint64_t*)($rsp - 120)')
gdb.execute('set *(uint64_t*)($rsp - 120) = %s' % old, False, True)
return fs_base
--
2.20.1