From: Richard Henderson <rth@twiddle.net>
Date: Tue, 31 Oct 2017 12:53:54 +0000 (+0100)
Subject: linux-user/hppa: Fix cpu_clone_regs
X-Git-Tag: v2.11.0-rc2~10^2~12
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fc37dcfe1a049090e72fd3f4810f0b221cc5399c;p=thirdparty%2Fqemu.git

linux-user/hppa: Fix cpu_clone_regs

By failing to return from the syscall in the child, the child
issues another clone syscall and hilarity ensues.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---

diff --git a/linux-user/hppa/target_cpu.h b/linux-user/hppa/target_cpu.h
index 1a5cecad3c4..e50522eae95 100644
--- a/linux-user/hppa/target_cpu.h
+++ b/linux-user/hppa/target_cpu.h
@@ -24,7 +24,11 @@ static inline void cpu_clone_regs(CPUHPPAState *env, target_ulong newsp)
     if (newsp) {
         env->gr[30] = newsp;
     }
+    /* Indicate child in return value.  */
     env->gr[28] = 0;
+    /* Return from the syscall.  */
+    env->iaoq_f = env->gr[31];
+    env->iaoq_b = env->gr[31] + 4;
 }
 
 static inline void cpu_set_tls(CPUHPPAState *env, target_ulong newtls)