[Qemu-devel] [PATCH 33/34] linux-user: Support for restarting system calls for CRIS targets

[Timothy E Baldwin]

Signed-off-by: Timothy Edward Baldwin <address@hidden>
---

WARNING - NOT TESTED

 linux-user/cris/syscall.h | 2 ++
 linux-user/main.c         | 6 +++++-
 linux-user/signal.c       | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/linux-user/cris/syscall.h b/linux-user/cris/syscall.h
index 2957b0d..29218e2 100644
--- a/linux-user/cris/syscall.h
+++ b/linux-user/cris/syscall.h
@@ -44,3 +44,5 @@ struct target_pt_regs {
 #define TARGET_MLOCKALL_MCL_FUTURE  2
 
 #endif
+
+#define TARGET_USE_ERESTARTSYS 1
diff --git a/linux-user/main.c b/linux-user/main.c
index a59907e..a9eb15c 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -2878,7 +2878,11 @@ 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 e17514e..3741517 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -3761,7 +3761,7 @@ 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);
 }
-- 
2.1.4