From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- third_party/dav1d/src/arm/asm.S | 291 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 291 insertions(+) create mode 100644 third_party/dav1d/src/arm/asm.S (limited to 'third_party/dav1d/src/arm/asm.S') diff --git a/third_party/dav1d/src/arm/asm.S b/third_party/dav1d/src/arm/asm.S new file mode 100644 index 0000000000..dc50415f1f --- /dev/null +++ b/third_party/dav1d/src/arm/asm.S @@ -0,0 +1,291 @@ +/* + * Copyright © 2018, VideoLAN and dav1d authors + * Copyright © 2018, Janne Grunau + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef DAV1D_SRC_ARM_ASM_S +#define DAV1D_SRC_ARM_ASM_S + +#include "config.h" + +#if ARCH_AARCH64 +#define x18 do_not_use_x18 +#define w18 do_not_use_w18 + +/* Support macros for + * - Armv8.3-A Pointer Authentication and + * - Armv8.5-A Branch Target Identification + * features which require emitting a .note.gnu.property section with the + * appropriate architecture-dependent feature bits set. + * + * |AARCH64_SIGN_LINK_REGISTER| and |AARCH64_VALIDATE_LINK_REGISTER| expand to + * PACIxSP and AUTIxSP, respectively. |AARCH64_SIGN_LINK_REGISTER| should be + * used immediately before saving the LR register (x30) to the stack. + * |AARCH64_VALIDATE_LINK_REGISTER| should be used immediately after restoring + * it. Note |AARCH64_SIGN_LINK_REGISTER|'s modifications to LR must be undone + * with |AARCH64_VALIDATE_LINK_REGISTER| before RET. The SP register must also + * have the same value at the two points. For example: + * + * .global f + * f: + * AARCH64_SIGN_LINK_REGISTER + * stp x29, x30, [sp, #-96]! + * mov x29, sp + * ... + * ldp x29, x30, [sp], #96 + * AARCH64_VALIDATE_LINK_REGISTER + * ret + * + * |AARCH64_VALID_CALL_TARGET| expands to BTI 'c'. Either it, or + * |AARCH64_SIGN_LINK_REGISTER|, must be used at every point that may be an + * indirect call target. In particular, all symbols exported from a file must + * begin with one of these macros. For example, a leaf function that does not + * save LR can instead use |AARCH64_VALID_CALL_TARGET|: + * + * .globl return_zero + * return_zero: + * AARCH64_VALID_CALL_TARGET + * mov x0, #0 + * ret + * + * A non-leaf function which does not immediately save LR may need both macros + * because |AARCH64_SIGN_LINK_REGISTER| appears late. For example, the function + * may jump to an alternate implementation before setting up the stack: + * + * .globl with_early_jump + * with_early_jump: + * AARCH64_VALID_CALL_TARGET + * cmp x0, #128 + * b.lt .Lwith_early_jump_128 + * AARCH64_SIGN_LINK_REGISTER + * stp x29, x30, [sp, #-96]! + * mov x29, sp + * ... + * ldp x29, x30, [sp], #96 + * AARCH64_VALIDATE_LINK_REGISTER + * ret + * + * .Lwith_early_jump_128: + * ... + * ret + * + * These annotations are only required with indirect calls. Private symbols that + * are only the target of direct calls do not require annotations. Also note + * that |AARCH64_VALID_CALL_TARGET| is only valid for indirect calls (BLR), not + * indirect jumps (BR). Indirect jumps in assembly are supported through + * |AARCH64_VALID_JUMP_TARGET|. Landing Pads which shall serve for jumps and + * calls can be created using |AARCH64_VALID_JUMP_CALL_TARGET|. + * + * Although not necessary, it is safe to use these macros in 32-bit ARM + * assembly. This may be used to simplify dual 32-bit and 64-bit files. + * + * References: + * - "ELF for the Arm® 64-bit Architecture" + * https: *github.com/ARM-software/abi-aa/blob/master/aaelf64/aaelf64.rst + * - "Providing protection for complex software" + * https://developer.arm.com/architectures/learn-the-architecture/providing-protection-for-complex-software + */ +#if defined(__ARM_FEATURE_BTI_DEFAULT) && (__ARM_FEATURE_BTI_DEFAULT == 1) +#define GNU_PROPERTY_AARCH64_BTI (1 << 0) // Has Branch Target Identification +#define AARCH64_VALID_JUMP_CALL_TARGET hint #38 // BTI 'jc' +#define AARCH64_VALID_CALL_TARGET hint #34 // BTI 'c' +#define AARCH64_VALID_JUMP_TARGET hint #36 // BTI 'j' +#else +#define GNU_PROPERTY_AARCH64_BTI 0 // No Branch Target Identification +#define AARCH64_VALID_JUMP_CALL_TARGET +#define AARCH64_VALID_CALL_TARGET +#define AARCH64_VALID_JUMP_TARGET +#endif + +#if defined(__ARM_FEATURE_PAC_DEFAULT) + +#if ((__ARM_FEATURE_PAC_DEFAULT & (1 << 0)) != 0) // authentication using key A +#define AARCH64_SIGN_LINK_REGISTER paciasp +#define AARCH64_VALIDATE_LINK_REGISTER autiasp +#elif ((__ARM_FEATURE_PAC_DEFAULT & (1 << 1)) != 0) // authentication using key B +#define AARCH64_SIGN_LINK_REGISTER pacibsp +#define AARCH64_VALIDATE_LINK_REGISTER autibsp +#else +#error Pointer authentication defines no valid key! +#endif +#if ((__ARM_FEATURE_PAC_DEFAULT & (1 << 2)) != 0) // authentication of leaf functions +#error Authentication of leaf functions is enabled but not supported in dav1d! +#endif +#define GNU_PROPERTY_AARCH64_PAC (1 << 1) + +#elif defined(__APPLE__) && defined(__arm64e__) + +#define GNU_PROPERTY_AARCH64_PAC 0 +#define AARCH64_SIGN_LINK_REGISTER pacibsp +#define AARCH64_VALIDATE_LINK_REGISTER autibsp + +#else /* __ARM_FEATURE_PAC_DEFAULT */ + +#define GNU_PROPERTY_AARCH64_PAC 0 +#define AARCH64_SIGN_LINK_REGISTER +#define AARCH64_VALIDATE_LINK_REGISTER + +#endif /* !__ARM_FEATURE_PAC_DEFAULT */ + + +#if (GNU_PROPERTY_AARCH64_BTI != 0 || GNU_PROPERTY_AARCH64_PAC != 0) && defined(__ELF__) + .pushsection .note.gnu.property, "a" + .balign 8 + .long 4 + .long 0x10 + .long 0x5 + .asciz "GNU" + .long 0xc0000000 /* GNU_PROPERTY_AARCH64_FEATURE_1_AND */ + .long 4 + .long (GNU_PROPERTY_AARCH64_BTI | GNU_PROPERTY_AARCH64_PAC) + .long 0 + .popsection +#endif /* (GNU_PROPERTY_AARCH64_BTI != 0 || GNU_PROPERTY_AARCH64_PAC != 0) && defined(__ELF__) */ +#endif /* ARCH_AARCH64 */ + +#if ARCH_ARM + .syntax unified +#ifdef __ELF__ + .arch armv7-a + .fpu neon + .eabi_attribute 10, 0 // suppress Tag_FP_arch + .eabi_attribute 12, 0 // suppress Tag_Advanced_SIMD_arch + .section .note.GNU-stack,"",%progbits // Mark stack as non-executable +#endif /* __ELF__ */ + +#ifdef _WIN32 +#define CONFIG_THUMB 1 +#else +#define CONFIG_THUMB 0 +#endif + +#if CONFIG_THUMB + .thumb +#define A @ +#define T +#else +#define A +#define T @ +#endif /* CONFIG_THUMB */ +#endif /* ARCH_ARM */ + +#if !defined(PIC) +#if defined(__PIC__) +#define PIC __PIC__ +#elif defined(__pic__) +#define PIC __pic__ +#endif +#endif + +#ifndef PRIVATE_PREFIX +#define PRIVATE_PREFIX dav1d_ +#endif + +#define PASTE(a,b) a ## b +#define CONCAT(a,b) PASTE(a,b) + +#ifdef PREFIX +#define EXTERN CONCAT(_,PRIVATE_PREFIX) +#else +#define EXTERN PRIVATE_PREFIX +#endif + +.macro function name, export=0, align=2 + .macro endfunc +#ifdef __ELF__ + .size \name, . - \name +#endif +#if HAVE_AS_FUNC + .endfunc +#endif + .purgem endfunc + .endm + .text + .align \align + .if \export + .global EXTERN\name +#ifdef __ELF__ + .type EXTERN\name, %function + .hidden EXTERN\name +#elif defined(__MACH__) + .private_extern EXTERN\name +#endif +#if HAVE_AS_FUNC + .func EXTERN\name +#endif +EXTERN\name: + .else +#ifdef __ELF__ + .type \name, %function +#endif +#if HAVE_AS_FUNC + .func \name +#endif + .endif +\name: +#if ARCH_AARCH64 + .if \export + AARCH64_VALID_CALL_TARGET + .endif +#endif +.endm + +.macro const name, export=0, align=2 + .macro endconst +#ifdef __ELF__ + .size \name, . - \name +#endif + .purgem endconst + .endm +#if defined(_WIN32) + .section .rdata +#elif !defined(__MACH__) + .section .rodata +#else + .const_data +#endif + .align \align + .if \export + .global EXTERN\name +#ifdef __ELF__ + .hidden EXTERN\name +#elif defined(__MACH__) + .private_extern EXTERN\name +#endif +EXTERN\name: + .endif +\name: +.endm + +#ifdef __APPLE__ +#define L(x) L ## x +#else +#define L(x) .L ## x +#endif + +#define X(x) CONCAT(EXTERN, x) + + +#endif /* DAV1D_SRC_ARM_ASM_S */ -- cgit v1.2.3