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| author | Timothy E Baldwin <T.E.Baldwin99@members.leeds.ac.uk> | 2016-05-12 18:47:35 +0100 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2016-05-27 14:49:49 +0300 |
| commit | ba41249678f8c1504bf07706ddb0eda0d36cccc2 (patch) | |
| tree | 2257fb4ec35b6043c04c067d4be3f5c01310f66e /linux-user/main.c | |
| parent | c0bea68f9ea48f0dea7a06a259a613bfd3a7e35e (diff) | |
| download | qemu-ba41249678f8c1504bf07706ddb0eda0d36cccc2.tar.gz | |
linux-user: Support for restarting system calls for SH4 targets
Update the SH4 main loop and sigreturn code:
* on TARGET_ERESTARTSYS, wind guest PC backwards to repeat syscall insn
* set all guest CPU state within signal.c code on sigreturn
* handle TARGET_QEMU_ESIGRETURN in the main loop as the indication
that the main loop should not touch any guest CPU state
Signed-off-by: Timothy Edward Baldwin <T.E.Baldwin99@members.leeds.ac.uk>
Message-id: 1441497448-32489-12-git-send-email-T.E.Baldwin99@members.leeds.ac.uk
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: tweak commit message; drop TARGET_USE_ERESTARTSYS define]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Diffstat (limited to 'linux-user/main.c')
| -rw-r--r-- | linux-user/main.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/linux-user/main.c b/linux-user/main.c index 04a9b9b4c1..75552a050c 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -2826,7 +2826,11 @@ void cpu_loop(CPUSH4State *env) env->gregs[0], env->gregs[1], 0, 0); - env->gregs[0] = ret; + if (ret == -TARGET_ERESTARTSYS) { + env->pc -= 2; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->gregs[0] = ret; + } break; case EXCP_INTERRUPT: /* just indicate that signals should be handled asap */ |