From b8e13ba94e39aae79be5724b2a382091e4c91c83 Mon Sep 17 00:00:00 2001 From: Laurent Vivier Date: Mon, 28 May 2018 21:48:12 +0200 Subject: linux-user: SPARC "rd %tick" can be used by user application MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit we have the same problem decribed in 7d6b1daedd ("linux-user, ppc: mftbl can be used by user application") for ppc in the case of sparc. When we use an application trying to resolve a name, it hangs in 0x00000000ff5dd40c: rd %tick, %o5 0x00000000ff5dd410: srlx %o5, 0x20, %o4 0x00000000ff5dd414: btst %o5, %g4 0x00000000ff5dd418: be %icc, 0xff5dd40c because %tick is staying at 0. As QEMU_CLOCK_VIRTUAL is not available in linux-user mode, simply use cpu_get_host_ticks() instead. Signed-off-by: Laurent Vivier Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20180528194812.31216-1-laurent@vivier.eu> --- target/sparc/helper.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/target/sparc/helper.c b/target/sparc/helper.c index 1d85489..4623278 100644 --- a/target/sparc/helper.c +++ b/target/sparc/helper.c @@ -67,7 +67,9 @@ uint64_t helper_tick_get_count(CPUSPARCState *env, void *opaque, int mem_idx) return cpu_tick_get_count(timer); #else - return 0; + /* In user-mode, QEMU_CLOCK_VIRTUAL doesn't exist. + Just pass through the host cpu clock ticks. */ + return cpu_get_host_ticks(); #endif } -- cgit v1.1