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.hender...@linaro.org>
---
linux-user/sparc/cpu_loop.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/linux-user/sparc/cpu_loop.c b/linux-user/sparc/cpu_loop.c
index 9e357229c0..0816da6fa1 100644
--- a/linux-user/sparc/cpu_loop.c
+++ b/linux-user/sparc/cpu_loop.c
@@ -169,6 +169,18 @@ void cpu_loop (CPUSPARCState *env)
case 0x110:
case 0x16d:
#endif
+ /*
+ * Before copying/adjusting registers for parent/child,
+ * flush the register windows to the stack.
+ */
+ switch (env->gregs[1]) {
+ case TARGET_NR_fork:
+ case TARGET_NR_vfork:
+ case TARGET_NR_clone:
+ flush_windows(env);
+ break;
+ }
+
ret = do_syscall (env, env->gregs[1],
env->regwptr[0], env->regwptr[1],
env->regwptr[2], env->regwptr[3],
--
2.17.1
