| // Copyright (c) 2015, 2022, Red Hat Inc. All rights reserved. | |
| // Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved. | |
| // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| // | |
| // This code is free software; you can redistribute it and/or modify it | |
| // under the terms of the GNU General Public License version 2 only, as | |
| // published by the Free Software Foundation. | |
| // | |
| // This code is distributed in the hope that it will be useful, but WITHOUT | |
| // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| // version 2 for more details (a copy is included in the LICENSE file that | |
| // accompanied this code). | |
| // | |
| // You should have received a copy of the GNU General Public License version | |
| // 2 along with this work; if not, write to the Free Software Foundation, | |
| // Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| // | |
| // Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| // or visit www.oracle.com if you need additional information or have any | |
| // questions. | |
| #include "defs.S.inc" | |
| // JavaThread::aarch64_get_thread_helper() | |
| // | |
| // Return the current thread pointer in x0. | |
| // Clobber x1, flags. | |
| // All other registers are preserved, | |
| DECLARE_FUNC(_ZN10JavaThread25aarch64_get_thread_helperEv): | |
| hint #0x19 // paciasp | |
| stp x29, x30, [sp, -16]! | |
| adrp x0, :tlsdesc:_ZN6Thread12_thr_currentE | |
| ldr x1, [x0, #:tlsdesc_lo12:_ZN6Thread12_thr_currentE] | |
| add x0, x0, :tlsdesc_lo12:_ZN6Thread12_thr_currentE | |
| .tlsdesccall _ZN6Thread12_thr_currentE | |
| blr x1 | |
| mrs x1, tpidr_el0 | |
| add x0, x1, x0 | |
| ldr x0, [x0] | |
| ldp x29, x30, [sp], 16 | |
| hint #0x1d // autiasp | |
| ret | |
| .size _ZN10JavaThread25aarch64_get_thread_helperEv, .-_ZN10JavaThread25aarch64_get_thread_helperEv | |
| /* Emit .note.gnu.property section in case of PAC or BTI being enabled. | |
| * For more details see "ELF for the Arm(R) 64-bit Architecture (AArch64)". | |
| * https://github.com/ARM-software/abi-aa/blob/main/aaelf64/aaelf64.rst | |
| */ | |
| #ifdef __ARM_FEATURE_BTI_DEFAULT | |
| #ifdef __ARM_FEATURE_PAC_DEFAULT | |
| #define GNU_PROPERTY_AARCH64_FEATURE 3 | |
| #else | |
| #define GNU_PROPERTY_AARCH64_FEATURE 1 | |
| #endif | |
| #else | |
| #ifdef __ARM_FEATURE_PAC_DEFAULT | |
| #define GNU_PROPERTY_AARCH64_FEATURE 2 | |
| #else | |
| #define GNU_PROPERTY_AARCH64_FEATURE 0 | |
| #endif | |
| #endif | |
| #if (GNU_PROPERTY_AARCH64_FEATURE != 0) | |
| .pushsection .note.gnu.property, "a" | |
| .align 3 | |
| .long 4 /* name length */ | |
| .long 0x10 /* data length */ | |
| .long 5 /* note type: NT_GNU_PROPERTY_TYPE_0 */ | |
| .string "GNU" /* vendor name */ | |
| .long 0xc0000000 /* GNU_PROPERTY_AARCH64_FEATURE_1_AND */ | |
| .long 4 /* pr_datasze */ | |
| .long GNU_PROPERTY_AARCH64_FEATURE | |
| .long 0 | |
| .popsection | |
| #endif |