1 // Copyright (c) 2015, Red Hat Inc. All rights reserved.
   2 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   3 //
   4 // This code is free software; you can redistribute it and/or modify it
   5 // under the terms of the GNU General Public License version 2 only, as
   6 // published by the Free Software Foundation.
   7 //
   8 // This code is distributed in the hope that it will be useful, but WITHOUT
   9 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10 // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11 // version 2 for more details (a copy is included in the LICENSE file that
  12 // accompanied this code).
  13 //
  14 // You should have received a copy of the GNU General Public License version
  15 // 2 along with this work; if not, write to the Free Software Foundation,
  16 // Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17 //
  18 // Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19 // or visit www.oracle.com if you need additional information or have any
  20 // questions.
  21 
  22         // JavaThread::aarch64_get_thread_helper()
  23         //
  24         // Return the current thread pointer in x0.
  25         // Clobber x1, flags.
  26         // All other registers are preserved,
  27 
  28         .global _ZN10JavaThread25aarch64_get_thread_helperEv
  29         .type   _ZN10JavaThread25aarch64_get_thread_helperEv, %function
  30 
  31 _ZN10JavaThread25aarch64_get_thread_helperEv:
  32         stp x29, x30, [sp, -16]!
  33         adrp x0, :tlsdesc:_ZN6Thread12_thr_currentE
  34         ldr x1, [x0, #:tlsdesc_lo12:_ZN6Thread12_thr_currentE]
  35         add x0, x0, :tlsdesc_lo12:_ZN6Thread12_thr_currentE
  36         .tlsdesccall _ZN6Thread12_thr_currentE
  37         blr x1
  38         mrs x1, tpidr_el0
  39         add x0, x1, x0
  40         ldr x0, [x0]
  41         ldp x29, x30, [sp], 16
  42         ret
  43 
  44         .size _ZN10JavaThread25aarch64_get_thread_helperEv, .-_ZN10JavaThread25aarch64_get_thread_helperEv