commit 82aea781365f911e29386479a1da24c7664d78b7
author Ryan Prichard <rprichard@google.com> Thu Jan 03 00:06:17 2019 -0800
committer Ryan Prichard <rprichard@google.com> Wed Jan 16 01:11:26 2019 -0800
tree 98d93d63c4233ea77fbadce21c7c54f2b3b7e5a6
parent ca305a39e50d92dc572f50f00262b3dbb0dece9d

Use TLS_SLOT_THREAD_ID macro in vfork.S

No functional change intended.

Bug: none
Test: bionic unit tests
Change-Id: I7ee0a2b3f0e3807abe88bfa34ef3cd56c150a8f6

libc/arch-x86/bionic/vfork.S

diff --git a/libc/arch-x86/bionic/vfork.S b/libc/arch-x86/bionic/vfork.S
index 79d7899..24ede3d 100644
--- a/libc/arch-x86/bionic/vfork.S
+++ b/libc/arch-x86/bionic/vfork.S
@@ -27,6 +27,7 @@
  */
 
 #include <private/bionic_asm.h>
+#include <private/bionic_asm_tls.h>
 
 // This custom code preserves the return address across the system call.
 
@@ -38,7 +39,7 @@
 
   // __get_tls()[TLS_SLOT_THREAD_ID]->cached_pid_ = 0
   movl    %gs:0, %eax
-  movl    4(%eax), %eax
+  movl    (TLS_SLOT_THREAD_ID * 4)(%eax), %eax
   movl    $0, 12(%eax)
 
   movl    $__NR_vfork, %eax