commit 395071d7118acdd1718f522be692aab54b9c4afb
author Steve Austin <steveaustin@google.com> Wed Apr 25 14:07:45 2018 -0700
committer Steve Austin <steveaustin@google.com> Fri Apr 27 12:24:23 2018 -0700
tree 7fd1fb48db1fafe8697e039a515443052dadb972
parent 189ee81f9768f4ffbd3ffa52997a229c81ac0c7e

Set GS register for Fuchsia

Test: Tested with Fuchsia build system and toolchain

Change-Id: I85f9bdb59090df5cf4c21ef585f813730d84ba3f

runtime/arch/x86_64/thread_x86_64.cc

diff --git a/runtime/arch/x86_64/thread_x86_64.cc b/runtime/arch/x86_64/thread_x86_64.cc
index 19d25f6..5c0446f 100644
--- a/runtime/arch/x86_64/thread_x86_64.cc
+++ b/runtime/arch/x86_64/thread_x86_64.cc
@@ -25,6 +25,10 @@
 #include <asm/prctl.h>
 #include <sys/prctl.h>
 #include <sys/syscall.h>
+#elif defined(__Fuchsia__)
+#include <zircon/process.h>
+#include <zircon/syscalls.h>
+#include <zircon/syscalls/object.h>
 #endif
 
 namespace art {
@@ -40,6 +44,13 @@
 
 #if defined(__linux__)
   arch_prctl(ARCH_SET_GS, this);
+#elif defined(__Fuchsia__)
+  Thread* thread_ptr = this;
+  zx_status_t status = zx_object_set_property(zx_thread_self(),
+                                              ZX_PROP_REGISTER_GS,
+                                              &thread_ptr,
+                                              sizeof(thread_ptr));
+  CHECK_EQ(status, ZX_OK) << "failed to set GS register";
 #else
   UNIMPLEMENTED(FATAL) << "Need to set GS";
 #endif