[Qemu-devel] [PATCH 04/13] linux-user/alpha: Set r20 secondary return value

[Richard Henderson]

This value is not, as far as I know, used by any linux software,
but it is set by the kernel and is part of the ABI.

Signed-off-by: Richard Henderson <address@hidden>
---
 linux-user/alpha/target_cpu.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/linux-user/alpha/target_cpu.h b/linux-user/alpha/target_cpu.h
index 140a459f73..caadb54372 100644
--- a/linux-user/alpha/target_cpu.h
+++ b/linux-user/alpha/target_cpu.h
@@ -26,10 +26,12 @@ static inline void cpu_clone_regs_child(CPUAlphaState *env, 
target_ulong newsp)
     }
     env->ir[IR_V0] = 0;
     env->ir[IR_A3] = 0;
+    env->ir[IR_A4] = 1;  /* OSF/1 secondary return: child */
 }
 
 static inline void cpu_clone_regs_parent(CPUAlphaState *env)
 {
+    env->ir[IR_A4] = 0;  /* OSF/1 secondary return: parent */
 }
 
 static inline void cpu_set_tls(CPUAlphaState *env, target_ulong newtls)
-- 
2.17.1