linux-user: fix alpha signal emulation

setup_frame() doesn't set correctly the address of the trampoline code.
The offset of retcode array must be added to the stack frame address.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20180401204653.14211-1-laurent@vivier.eu>

diff --git a/linux-user/signal.c b/linux-user/signal.c
index 2ea3e0321f4d042aa2427304681dc66aaffe4d4c..9399f0ec470fc5b34458eb03796b10737be44dfc 100644 (file)
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -6367,7 +6367,7 @@ static void setup_frame(int sig, struct target_sigaction *ka,
                    &frame->retcode[1]);
         __put_user(INSN_CALLSYS, &frame->retcode[2]);
         /* imb() */
-        r26 = frame_addr;
+        r26 = frame_addr + offsetof(struct target_sigframe, retcode);
     }
 
     unlock_user_struct(frame, frame_addr, 1);
@@ -6424,7 +6424,7 @@ static void setup_rt_frame(int sig, struct target_sigaction *ka,
                    &frame->retcode[1]);
         __put_user(INSN_CALLSYS, &frame->retcode[2]);
         /* imb(); */
-        r26 = frame_addr;
+        r26 = frame_addr + offsetof(struct target_sigframe, retcode);
     }
 
     if (err) {