diff options
| author | Laurent Vivier <laurent@vivier.eu> | 2015-06-30 11:49:54 +0200 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2015-07-07 17:44:49 +0200 |
| commit | 7d6b1daedd00b35e50ce87ea835f662b36a23160 (patch) | |
| tree | bd22b12d14083ab7313ea43ce34b52a35adb5f1a /hw | |
| parent | 1452673888f6d7f0454276d049846c9bec659233 (diff) | |
linux-user, ppc: mftbl can be used by user application
In qemu-linux-user, when calling gethostbyname2(),
it was hanging in .__res_nmkquery.
(gdb) bt
0 in .__res_nmkquery () from /lib64/libresolv.so.2
1 in .__libc_res_nquery () from /lib64/libresolv.so.2
2 in .__libc_res_nsearch () from /lib64/libresolv.so.2
3 in ._nss_dns_gethostbyname3_r () from /lib64/libnss_dns.so.2
4 in ._nss_dns_gethostbyname2_r () from /lib64/libnss_dns.so.2
5 in .gethostbyname2_r () from /lib64/libc.so.6
6 in .gethostbyname2 () from /lib64/libc.so.6
.__res_nmkquery() is:
...
do { RANDOM_BITS (randombits); } while ((randombits & 0xffff) == 0);
...
<.__res_nmkquery+112>: mftbl r11
<.__res_nmkquery+116>: clrlwi r10,r11,16
<.__res_nmkquery+120>: cmpwi cr7,r10,0
<.__res_nmkquery+124>: beq cr7,<.__res_nmkquery+112>
but as mftbl (Move From Time Base Lower) is not implemented,
r11 is always 0, so we have an infinite loop.
This patch fills the Time Base register with cpu_get_real_ticks().
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'hw')
0 files changed, 0 insertions, 0 deletions