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[Qemu-ppc] [PATCH 1/7] linux-user: Fix Stack Pointer Bug in PPC setup_rt

From: Tom Musta
Subject: [Qemu-ppc] [PATCH 1/7] linux-user: Fix Stack Pointer Bug in PPC setup_rt_frame
Date: Mon, 30 Jun 2014 08:13:36 -0500

The code that sets the stack frame back pointer is incorrect for
the setup_rt_frame() code; qemu will abort (SIGSEGV) in some
environments.  The setup_frame code  was fixed in commit
beb526b12134a6b6744125deec5a7fe24a8f92e3 but the setup_rt_frame
code was not.

Make the setup_rt_frame code consistent with the setup_frame

Signed-off-by: Tom Musta <address@hidden>
 linux-user/signal.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/linux-user/signal.c b/linux-user/signal.c
index f3b4378..256f9b9 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -4740,7 +4740,7 @@ static void setup_rt_frame(int sig, struct 
target_sigaction *ka,
     /* Create a stack frame for the caller of the handler.  */
     newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
-    __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp);
+    err |= put_user(env->gpr[1], newsp, target_ulong);
     if (err)
         goto sigsegv;

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