From: Timothy E Baldwin <t.e.baldwi...@members.leeds.ac.uk>
Update the SPARC 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.baldwi...@members.leeds.ac.uk>
Message-id: 1441497448-32489-9-git-send-email-t.e.baldwi...@members.leeds.ac.uk
[PMM: Commit message tweaks; drop TARGET_USE_ERESTARTSYS define]
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
Signed-off-by: Riku Voipio <riku.voi...@linaro.org>
---
linux-user/main.c | 3 +++
linux-user/signal.c | 2 +-
linux-user/sparc/target_signal.h | 1 +
linux-user/sparc64/target_signal.h | 1 +
4 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/linux-user/main.c b/linux-user/main.c
index dfc098f..04a9b9b 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -1376,6 +1376,9 @@ void cpu_loop (CPUSPARCState *env)
env->regwptr[2], env->regwptr[3],
env->regwptr[4], env->regwptr[5],
0, 0);
+ if (ret == -TARGET_ERESTARTSYS || ret == -TARGET_QEMU_ESIGRETURN) {
+ break;
+ }
if ((abi_ulong)ret >= (abi_ulong)(-515)) {
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
env->xcc |= PSR_CARRY;
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 14e58b0..e742347 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -2449,7 +2449,7 @@ long do_sigreturn(CPUSPARCState *env)
goto segv_and_exit;
}
unlock_user_struct(sf, sf_addr, 0);
- return env->regwptr[0];
+ return -TARGET_QEMU_ESIGRETURN;
segv_and_exit:
unlock_user_struct(sf, sf_addr, 0);
diff --git a/linux-user/sparc/target_signal.h b/linux-user/sparc/target_signal.h
index c7de300..2df38c8 100644
--- a/linux-user/sparc/target_signal.h
+++ b/linux-user/sparc/target_signal.h
@@ -33,4 +33,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUSPARCState
*state)
return state->regwptr[UREG_FP];
}
+
#endif /* TARGET_SIGNAL_H */
diff --git a/linux-user/sparc64/target_signal.h
b/linux-user/sparc64/target_signal.h
index c7de300..2df38c8 100644
--- a/linux-user/sparc64/target_signal.h
+++ b/linux-user/sparc64/target_signal.h
@@ -33,4 +33,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUSPARCState
*state)
return state->regwptr[UREG_FP];
}
+
#endif /* TARGET_SIGNAL_H */
--
2.1.4
