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[4/4] linux-user/sparc: Flush register windows before clone

Message ID 20180730201553.32423-5-richard.henderson@linaro.org
State New
Headers show
Series linux-user/sparc: Fixes for clone | expand

Commit Message

Richard Henderson July 30, 2018, 8:15 p.m. UTC 
As seen as the very first instruction of sys_clone in the kernel.

Ideally this would be done in or before cpu_copy, and not with a
separate explicit test vs the syscall number, but this is a more
minimal solution.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 linux-user/sparc/cpu_loop.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/linux-user/sparc/cpu_loop.c b/linux-user/sparc/cpu_loop.c
index 91f714afc6..fe83f25686 100644
--- a/linux-user/sparc/cpu_loop.c
+++ b/linux-user/sparc/cpu_loop.c
@@ -169,6 +169,9 @@  void cpu_loop (CPUSPARCState *env)
         case 0x110:
         case 0x16d:
 #endif
+            if (env->gregs[1] == TARGET_NR_clone) {
+                flush_windows(env);
+            }
             ret = do_syscall (env, env->gregs[1],
                               env->regwptr[0], env->regwptr[1],
                               env->regwptr[2], env->regwptr[3],