[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 32/34] linux-user: Support for restarting system cal
From: |
Timothy E Baldwin |
Subject: |
[Qemu-devel] [PATCH 32/34] linux-user: Support for restarting system calls for S390 targets |
Date: |
Sun, 6 Sep 2015 00:57:26 +0100 |
Signed-off-by: Timothy Edward Baldwin <address@hidden>
---
WARNING - NOT TESTED
linux-user/main.c | 12 +++++++++---
linux-user/s390x/syscall.h | 2 ++
linux-user/signal.c | 4 ++--
3 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/linux-user/main.c b/linux-user/main.c
index 0863945..a59907e 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -3355,6 +3355,7 @@ void cpu_loop(CPUS390XState *env)
int trapnr, n, sig;
target_siginfo_t info;
target_ulong addr;
+ abi_long ret;
while (1) {
cpu_exec_start(cs);
@@ -3372,9 +3373,14 @@ void cpu_loop(CPUS390XState *env)
n = env->regs[1];
}
env->psw.addr += env->int_svc_ilen;
- env->regs[2] = do_syscall(env, n, env->regs[2], env->regs[3],
- env->regs[4], env->regs[5],
- env->regs[6], env->regs[7], 0, 0);
+ ret = do_syscall(env, n, env->regs[2], env->regs[3],
+ env->regs[4], env->regs[5],
+ env->regs[6], env->regs[7], 0, 0);
+ if (ret == -TARGET_ERESTARTSYS) {
+ env->psw.addr -= env->int_svc_ilen;;
+ } else if (ret != -TARGET_QEMU_ESIGRETURN) {
+ env->regs[2] = ret;
+ }
break;
case EXCP_DEBUG:
diff --git a/linux-user/s390x/syscall.h b/linux-user/s390x/syscall.h
index 35f170a..914ec98 100644
--- a/linux-user/s390x/syscall.h
+++ b/linux-user/s390x/syscall.h
@@ -27,3 +27,5 @@ struct target_pt_regs {
#define TARGET_MINSIGSTKSZ 2048
#define TARGET_MLOCKALL_MCL_CURRENT 1
#define TARGET_MLOCKALL_MCL_FUTURE 2
+
+#define TARGET_USE_ERESTARTSYS 1
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 3bae33b..e17514e 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -4267,7 +4267,7 @@ long do_sigreturn(CPUS390XState *env)
}
unlock_user_struct(frame, frame_addr, 0);
- return env->regs[2];
+ return -TARGET_QEMU_ESIGRETURN;
badframe:
force_sig(TARGET_SIGSEGV);
@@ -4298,7 +4298,7 @@ long do_rt_sigreturn(CPUS390XState *env)
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
- return env->regs[2];
+ return -TARGET_QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
--
2.1.4
- Re: [Qemu-devel] [PATCH 13/34] linux-user: Fix signal before blocking system calls race and SA_RESTART, (continued)
- [Qemu-devel] [PATCH 30/34] linux-user: Support for restarting system calls for OpenRISC targets, Timothy E Baldwin, 2015/09/05
- [Qemu-devel] [PATCH 29/34] linux-user: Support for restarting system calls for UniCore32 targets, Timothy E Baldwin, 2015/09/05
- [Qemu-devel] [PATCH 12/34] linux-user: Support for restarting system calls for APLHA targets, Timothy E Baldwin, 2015/09/05
- [Qemu-devel] [PATCH 28/34] linux-user: Restart sigaction() if signal pending, Timothy E Baldwin, 2015/09/05
- [Qemu-devel] [PATCH 23/34] linux-user: Queue synchronous signals separately, Timothy E Baldwin, 2015/09/05
- [Qemu-devel] [PATCH 32/34] linux-user: Support for restarting system calls for S390 targets,
Timothy E Baldwin <=
- [Qemu-devel] [PATCH 22/34] linux-user: Remove real-time signal queuing, Timothy E Baldwin, 2015/09/05
- [Qemu-devel] [PATCH 33/34] linux-user: Support for restarting system calls for CRIS targets, Timothy E Baldwin, 2015/09/05
[Qemu-devel] [PATCH 18/34] linux-user: Fix race between multiple signals, Timothy E Baldwin, 2015/09/05
[Qemu-devel] [PATCH 24/34] linux-user: Restart execve() if signal pending, Timothy E Baldwin, 2015/09/05