aarch64: Add assembly support for -fsanitize=hwaddress tagged globals.
[libav.git] / libavutil / aarch64 / asm.S
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1/*
2 * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
3 *
4 * This file is part of Libav.
5 *
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include "config.h"
22
23#ifdef __ELF__
24# define ELF
25#else
69ac24e5 26# define ELF #
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27#endif
28
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29#if HAVE_AS_FUNC
30# define FUNC
31#else
32# define FUNC #
33#endif
34
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35#ifndef __has_feature
36# define __has_feature(x) 0
37#endif
38
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39.macro function name, export=0, align=2
40 .macro endfunc
41ELF .size \name, . - \name
d5a55981 42FUNC .endfunc
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43 .purgem endfunc
44 .endm
45 .text
46 .align \align
47 .if \export
48 .global EXTERN_ASM\name
9c029f67 49ELF .type EXTERN_ASM\name, %function
d5a55981 50FUNC .func EXTERN_ASM\name
b7b17ed6 51EXTERN_ASM\name:
9c029f67 52 .else
b7b17ed6 53ELF .type \name, %function
d5a55981 54FUNC .func \name
b7b17ed6 55\name:
9c029f67 56 .endif
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57.endm
58
780cd20b 59.macro const name, align=2, relocate=0
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60 .macro endconst
61ELF .size \name, . - \name
62 .purgem endconst
63 .endm
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64#if HAVE_SECTION_DATA_REL_RO
65.if \relocate
66 .section .data.rel.ro
67.else
68 .section .rodata
69.endif
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70#elif defined(_WIN32)
71 .section .rdata
780cd20b 72#elif !defined(__MACH__)
b7b17ed6 73 .section .rodata
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74#else
75 .const_data
76#endif
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77 .align \align
78\name:
79.endm
80
c44a8a3e 81.macro movrel rd, val, offset=0
fd2981ea 82#if CONFIG_PIC && defined(__APPLE__)
c44a8a3e 83 .if \offset < 0
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84 adrp \rd, \val@PAGE
85 add \rd, \rd, \val@PAGEOFF
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86 sub \rd, \rd, -(\offset)
87 .else
88 adrp \rd, \val+(\offset)@PAGE
89 add \rd, \rd, \val+(\offset)@PAGEOFF
90 .endif
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91#elif CONFIG_PIC && defined(_WIN32)
92 .if \offset < 0
93 adrp \rd, \val
94 add \rd, \rd, :lo12:\val
95 sub \rd, \rd, -(\offset)
96 .else
97 adrp \rd, \val+(\offset)
98 add \rd, \rd, :lo12:\val+(\offset)
99 .endif
fd2981ea 100#elif CONFIG_PIC
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101# if __has_feature(hwaddress_sanitizer)
102 adrp \rd, :pg_hi21_nc:\val+(\offset)
103# else
8847eeaa 104 adrp \rd, \val+(\offset)
e5afa1b5 105# endif
8847eeaa 106 add \rd, \rd, :lo12:\val+(\offset)
b7b17ed6 107#else
c44a8a3e 108 ldr \rd, =\val+\offset
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109#endif
110.endm
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111
112#define GLUE(a, b) a ## b
113#define JOIN(a, b) GLUE(a, b)
114#define X(s) JOIN(EXTERN_ASM, s)