From: Timothy E Baldwin <t.e.baldwi...@members.leeds.ac.uk>
Update the CRIS 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: 1441497448-32489-34-git-send-email-t.e.baldwi...@members.leeds.ac.uk
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.igles...@xilinx.com>
[PMM: tweak commit message; drop TARGET_USE_ERESTARTSYS define]
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
linux-user/cris/target_signal.h | 1 +
linux-user/main.c | 6 +++++-
linux-user/signal.c | 2 +-
3 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/linux-user/cris/target_signal.h b/linux-user/cris/target_signal.h
index 5611840..e0f1382 100644
--- a/linux-user/cris/target_signal.h
+++ b/linux-user/cris/target_signal.h
@@ -26,4 +26,5 @@ static inline abi_ulong get_sp_from_cpustate(CPUCRISState
*state)
return state->regs[14];
}
+
#endif /* TARGET_SIGNAL_H */
diff --git a/linux-user/main.c b/linux-user/main.c
index 4710e97..2df4e27 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -2913,7 +2913,11 @@ void cpu_loop(CPUCRISState *env)
env->pregs[7],
env->pregs[11],
0, 0);
- env->regs[10] = ret;
+ if (ret == -TARGET_ERESTARTSYS) {
+ env->pc -= 2;
+ } else if (ret != -TARGET_QEMU_ESIGRETURN) {
+ env->regs[10] = ret;
+ }
break;
case EXCP_DEBUG:
{
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 51e11c1..71a8e2a 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -3785,7 +3785,7 @@ long do_sigreturn(CPUCRISState *env)
restore_sigcontext(&frame->sc, env);
unlock_user_struct(frame, frame_addr, 0);
- return env->regs[10];
+ return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
}
--
1.9.1
