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[3/3] target/hppa: Fix cpu_clone_regs

Message ID 20170311034232.14213-4-rth@twiddle.net
State New
Headers show

Commit Message

Richard Henderson March 11, 2017, 3:42 a.m. UTC 
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>
---
 linux-user/hppa/target_cpu.h | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/linux-user/hppa/target_cpu.h b/linux-user/hppa/target_cpu.h
index 1a5ceca..e50522e 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)