| /* |
| * Copyright (c) 2022 SAP SE. All rights reserved. |
| * Copyright (c) 2022, 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" |
| |
| # Support for int SafeFetch32(int* address, int defaultval); |
| # |
| # x0 : address |
| # x1 : defaultval |
| DECLARE_FUNC(SafeFetch32_impl): |
| DECLARE_FUNC(_SafeFetch32_fault): |
| ldr w0, [x0] |
| ret |
| DECLARE_FUNC(_SafeFetch32_continuation): |
| mov x0, x1 |
| ret |
| |
| # Support for intptr_t SafeFetchN(intptr_t* address, intptr_t defaultval); |
| # |
| # x1 : address |
| # x0 : defaultval |
| DECLARE_FUNC(SafeFetchN_impl): |
| DECLARE_FUNC(_SafeFetchN_fault): |
| ldr x0, [x0] |
| ret |
| DECLARE_FUNC(_SafeFetchN_continuation): |
| mov x0, x1 |
| ret |
| |
| /* 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 |
