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[PATCH v8 05/68] linux-user/nios2: Handle special qemu syscall return va
From: |
Richard Henderson |
Subject: |
[PATCH v8 05/68] linux-user/nios2: Handle special qemu syscall return values |
Date: |
Fri, 22 Apr 2022 09:51:35 -0700 |
Honor QEMU_ESIGRETURN and QEMU_ERESTARTSYS.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220421151735.31996-6-richard.henderson@linaro.org>
---
linux-user/nios2/cpu_loop.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/linux-user/nios2/cpu_loop.c b/linux-user/nios2/cpu_loop.c
index 63afba5862..2963fc62b4 100644
--- a/linux-user/nios2/cpu_loop.c
+++ b/linux-user/nios2/cpu_loop.c
@@ -55,6 +55,14 @@ void cpu_loop(CPUNios2State *env)
env->regs[7], env->regs[8], env->regs[9],
0, 0);
+ if (ret == -QEMU_ESIGRETURN) {
+ /* rt_sigreturn has set all state. */
+ break;
+ }
+ if (ret == -QEMU_ERESTARTSYS) {
+ env->regs[R_PC] -= 4;
+ break;
+ }
/*
* See the code after translate_rc_and_ret: all negative
* values are errors (aided by userspace restricted to 2G),
--
2.34.1
- [PATCH v8 00/68] nios2 fixes, cleanups, shadow reg sets, Richard Henderson, 2022/04/22
- [PATCH v8 02/68] linux-user/nios2: Fix clone child return, Richard Henderson, 2022/04/22
- [PATCH v8 03/68] linux-user/nios2: Drop syscall 0 "workaround", Richard Henderson, 2022/04/22
- [PATCH v8 04/68] linux-user/nios2: Adjust error return, Richard Henderson, 2022/04/22
- [PATCH v8 01/68] linux-user/nios2: Hoist pc advance to the top of EXCP_TRAP, Richard Henderson, 2022/04/22
- [PATCH v8 05/68] linux-user/nios2: Handle special qemu syscall return values,
Richard Henderson <=
- [PATCH v8 06/68] linux-user/nios2: Remove do_sigreturn, Richard Henderson, 2022/04/22
- [PATCH v8 07/68] linux-user/nios2: Use QEMU_ESIGRETURN from do_rt_sigreturn, Richard Henderson, 2022/04/22
- [PATCH v8 08/68] tests/tcg/nios2: Re-enable linux-user tests, Richard Henderson, 2022/04/22
- [PATCH v8 09/68] target/nios2: Remove user-only nios2_cpu_do_interrupt, Richard Henderson, 2022/04/22
- [PATCH v8 10/68] target/nios2: Remove nios2_cpu_record_sigsegv, Richard Henderson, 2022/04/22
- [PATCH v8 11/68] target/nios2: Build helper.c for system only, Richard Henderson, 2022/04/22
- [PATCH v8 12/68] linux-user/nios2: Use force_sig_fault for EXCP_DEBUG, Richard Henderson, 2022/04/22
- [PATCH v8 14/68] target/nios2: Stop generating code if gen_check_supervisor fails, Richard Henderson, 2022/04/22
- [PATCH v8 13/68] target/nios2: Check supervisor on eret, Richard Henderson, 2022/04/22
- [PATCH v8 16/68] target/nios2: Split PC out of env->regs[], Richard Henderson, 2022/04/22