From 7d6b1daedd00b35e50ce87ea835f662b36a23160 Mon Sep 17 00:00:00 2001 From: Laurent Vivier Date: Tue, 30 Jun 2015 11:49:54 +0200 Subject: 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 Signed-off-by: Alexander Graf --- linux-user/main.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'linux-user') diff --git a/linux-user/main.c b/linux-user/main.c index c855bccadc..6c5c2effbf 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -1424,8 +1424,7 @@ void cpu_loop (CPUSPARCState *env) #ifdef TARGET_PPC static inline uint64_t cpu_ppc_get_tb(CPUPPCState *env) { - /* TO FIX */ - return 0; + return cpu_get_real_ticks(); } uint64_t cpu_ppc_load_tbl(CPUPPCState *env) -- cgit v1.2.1