31914882fc
This is the new replacement for the existing cortex-strings code which will be replaced in a follow-up commit. We should also be able to use some of the math functions to allow the tests to pass on AArch64 (and other architectures) instead of just x86. We might also be able to reuse some of the tests for the kyua testsuite. Imported using ``` curl -Le823e3abf5| tar --strip-components=1 -xvzf - git add . ``` Differential Revision: https://reviews.freebsd.org/D29035 git-subtree-dir: contrib/arm-optimized-routines git-subtree-mainline:e34c713b0egit-subtree-split:f9f37c002a
99 lines
1.9 KiB
C
99 lines
1.9 KiB
C
/*
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* Macros for asm code.
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*
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* Copyright (c) 2019-2020, Arm Limited.
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* SPDX-License-Identifier: MIT
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*/
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#ifndef _ASMDEFS_H
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#define _ASMDEFS_H
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#if defined(__aarch64__)
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/* Branch Target Identitication support. */
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#define BTI_C hint 34
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#define BTI_J hint 36
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/* Return address signing support (pac-ret). */
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#define PACIASP hint 25; .cfi_window_save
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#define AUTIASP hint 29; .cfi_window_save
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/* GNU_PROPERTY_AARCH64_* macros from elf.h. */
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#define FEATURE_1_AND 0xc0000000
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#define FEATURE_1_BTI 1
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#define FEATURE_1_PAC 2
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/* Add a NT_GNU_PROPERTY_TYPE_0 note. */
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#define GNU_PROPERTY(type, value) \
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.section .note.gnu.property, "a"; \
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.p2align 3; \
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.word 4; \
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.word 16; \
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.word 5; \
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.asciz "GNU"; \
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.word type; \
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.word 4; \
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.word value; \
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.word 0; \
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.text
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/* If set then the GNU Property Note section will be added to
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mark objects to support BTI and PAC-RET. */
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#ifndef WANT_GNU_PROPERTY
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#define WANT_GNU_PROPERTY 1
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#endif
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#if WANT_GNU_PROPERTY
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/* Add property note with supported features to all asm files. */
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GNU_PROPERTY (FEATURE_1_AND, FEATURE_1_BTI|FEATURE_1_PAC)
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#endif
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#define ENTRY_ALIGN(name, alignment) \
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.global name; \
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.type name,%function; \
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.align alignment; \
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name: \
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.cfi_startproc; \
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BTI_C;
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#else
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#define END_FILE
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#define ENTRY_ALIGN(name, alignment) \
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.global name; \
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.type name,%function; \
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.align alignment; \
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name: \
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.cfi_startproc;
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#endif
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#define ENTRY(name) ENTRY_ALIGN(name, 6)
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#define ENTRY_ALIAS(name) \
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.global name; \
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.type name,%function; \
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name:
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#define END(name) \
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.cfi_endproc; \
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.size name, .-name;
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#define L(l) .L ## l
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#ifdef __ILP32__
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/* Sanitize padding bits of pointer arguments as per aapcs64 */
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#define PTR_ARG(n) mov w##n, w##n
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#else
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#define PTR_ARG(n)
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#endif
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#ifdef __ILP32__
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/* Sanitize padding bits of size arguments as per aapcs64 */
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#define SIZE_ARG(n) mov w##n, w##n
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#else
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#define SIZE_ARG(n)
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#endif
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#endif
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