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| author | Laurent Vivier | 2018-05-28 21:48:12 +0200 |
|---|---|---|
| committer | Laurent Vivier | 2018-06-04 01:30:43 +0200 |
| commit | b8e13ba94e39aae79be5724b2a382091e4c91c83 (patch) | |
| tree | ff97ebfcdd53b3600c12d8b35aad37cb322cedbf /target | |
| parent | syscall: replace strcpy() by g_strlcpy() (diff) | |
| download | qemu-b8e13ba94e39aae79be5724b2a382091e4c91c83.tar.gz qemu-b8e13ba94e39aae79be5724b2a382091e4c91c83.tar.xz qemu-b8e13ba94e39aae79be5724b2a382091e4c91c83.zip | |
linux-user: SPARC "rd %tick" can be used by user application
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 <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20180528194812.31216-1-laurent@vivier.eu>
Diffstat (limited to 'target')
| -rw-r--r-- | target/sparc/helper.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/target/sparc/helper.c b/target/sparc/helper.c index 1d854890b4..46232788c8 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 } |