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[Qemu-devel] [PATCH v2 7/8] linux-user/sparc: Flush register windows bef

From: Richard Henderson
Subject: [Qemu-devel] [PATCH v2 7/8] linux-user/sparc: Flush register windows before clone
Date: Thu, 9 May 2019 20:27:09 -0700

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 <address@hidden>
 linux-user/sparc/cpu_loop.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/linux-user/sparc/cpu_loop.c b/linux-user/sparc/cpu_loop.c
index 9e357229c0..ff04f67847 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:
+            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],

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