From f47d0f6d5aa5878147dac31a86eabcc22f259da2 Mon Sep 17 00:00:00 2001
From: Itaru Kitayama <itaru.kitayama@riken.jp>
Date: Fri, 16 Dec 2016 06:46:43 -0600
Subject: [PATCH] arm64 check return value of the ptrace systemcall, not errno

---
 proccontrol/src/linux.C | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/proccontrol/src/linux.C b/proccontrol/src/linux.C
index 7df4740164..438f5c8626 100644
--- a/proccontrol/src/linux.C
+++ b/proccontrol/src/linux.C
@@ -2414,7 +2414,11 @@ bool linux_thread::plat_getRegister(Dyninst::MachRegister reg, Dyninst::MachRegi
    result = do_ptrace((pt_req) PTRACE_PEEKUSER, lwp, (void *) (unsigned long) offset, NULL);
 #endif
    //unsigned long result = do_ptrace((pt_req) PTRACE_PEEKUSER, lwp, (void *) (unsigned long) offset, NULL);
-   if (errno != 0) {
+#if defined(arch_aarch64)
+   if (ret != 0) {
+#else
+   if (result != 0) {
+#endif
       int error = errno;
       perr_printf("Error reading registers from %d: %s\n", lwp, strerror(errno));
       //pthrd_printf("ARM-Info: offset(%d-%d)\n", (void *)(unsigned long)offset, offset/8);