d81d009c6c
FreeBSD exports CPU features as bits in the AT_HWCAP and AT_HWCAP2 vectors via elf_aux_info(3). This interface is similar to getauxval(3) on Linux, and for simplicity to consumers we try to maintain an identical set of feature flags on arm64. The first batch of AT_HWCAP flags were added in r350166, corresponding to definitions that already existed in Linux. Unfortunately, one flag was missed, and a portion of the values are shifted one bit to the right as a result. Add the missing definition for HWCAP_ASIMDHP, and adjust the affected values to match their Linux counterparts. Although this is an ABI-breaking change, there is no plan to provide compat code for old binaries. An audit of our ports tree and other software via Debian code search indicates that there are not yet any consumers of this interface for FreeBSD/arm64. Bump __FreeBSD_version to be on the safe side, in case compat code needs to be added in the future. Reviewed by: emaste, manu MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D26329
154 lines
4.7 KiB
C
154 lines
4.7 KiB
C
/*-
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* Copyright (c) 1996-1997 John D. Polstra.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_ELF_H_
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#define _MACHINE_ELF_H_
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/*
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* ELF definitions for the AArch64 architecture.
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*/
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#include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */
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#include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */
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#ifndef __ELF_WORD_SIZE
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#define __ELF_WORD_SIZE 64 /* Used by <sys/elf_generic.h> */
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#endif
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#include <sys/elf_generic.h>
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/*
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* Auxiliary vector entries for passing information to the interpreter.
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*/
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typedef struct { /* Auxiliary vector entry on initial stack */
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int a_type; /* Entry type. */
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union {
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int a_val; /* Integer value. */
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} a_un;
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} Elf32_Auxinfo;
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typedef struct { /* Auxiliary vector entry on initial stack */
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long a_type; /* Entry type. */
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union {
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long a_val; /* Integer value. */
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void *a_ptr; /* Address. */
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void (*a_fcn)(void); /* Function pointer (not used). */
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} a_un;
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} Elf64_Auxinfo;
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__ElfType(Auxinfo);
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#ifdef _MACHINE_ELF_WANT_32BIT
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#define ELF_ARCH EM_ARM
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#else
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#define ELF_ARCH EM_AARCH64
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#endif
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#define ELF_MACHINE_OK(x) ((x) == (ELF_ARCH))
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/* Define "machine" characteristics */
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#if __ELF_WORD_SIZE == 64
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#define ELF_TARG_CLASS ELFCLASS64
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#define ELF_TARG_DATA ELFDATA2LSB
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#define ELF_TARG_MACH EM_AARCH64
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#define ELF_TARG_VER 1
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#else
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#define ELF_TARG_CLASS ELFCLASS32
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#define ELF_TARG_DATA ELFDATA2LSB
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#define ELF_TARG_MACH EM_ARM
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#define ELF_TARG_VER 1
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#endif
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#if __ELF_WORD_SIZE == 32
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#define ET_DYN_LOAD_ADDR 0x12000
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#else
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#define ET_DYN_LOAD_ADDR 0x100000
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#endif
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/* HWCAP */
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#define HWCAP_FP 0x00000001
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#define HWCAP_ASIMD 0x00000002
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#define HWCAP_EVTSTRM 0x00000004
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#define HWCAP_AES 0x00000008
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#define HWCAP_PMULL 0x00000010
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#define HWCAP_SHA1 0x00000020
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#define HWCAP_SHA2 0x00000040
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#define HWCAP_CRC32 0x00000080
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#define HWCAP_ATOMICS 0x00000100
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#define HWCAP_FPHP 0x00000200
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#define HWCAP_ASIMDHP 0x00000400
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/*
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* XXX: The following bits (from CPUID to FLAGM) were originally incorrect,
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* but later changed to match the Linux definitions. No compatibility code is
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* provided, as the fix was expected to result in near-zero fallout.
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*/
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#define HWCAP_CPUID 0x00000800
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#define HWCAP_ASIMDRDM 0x00001000
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#define HWCAP_JSCVT 0x00002000
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#define HWCAP_FCMA 0x00004000
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#define HWCAP_LRCPC 0x00008000
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#define HWCAP_DCPOP 0x00010000
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#define HWCAP_SHA3 0x00020000
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#define HWCAP_SM3 0x00040000
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#define HWCAP_SM4 0x00080000
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#define HWCAP_ASIMDDP 0x00100000
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#define HWCAP_SHA512 0x00200000
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#define HWCAP_SVE 0x00400000
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#define HWCAP_ASIMDFHM 0x00800000
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#define HWCAP_DIT 0x01000000
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#define HWCAP_USCAT 0x02000000
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#define HWCAP_ILRCPC 0x04000000
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#define HWCAP_FLAGM 0x08000000
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#define HWCAP_SSBS 0x10000000
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#define HWCAP_SB 0x20000000
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#define HWCAP_PACA 0x40000000
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#define HWCAP_PACG 0x80000000
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/* HWCAP2 */
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#define HWCAP2_DCPODP 0x00000001
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#define HWCAP2_SVE2 0x00000002
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#define HWCAP2_SVEAES 0x00000004
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#define HWCAP2_SVEPMULL 0x00000008
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#define HWCAP2_SVEBITPERM 0x00000010
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#define HWCAP2_SVESHA3 0x00000020
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#define HWCAP2_SVESM4 0x00000040
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#define HWCAP2_FLAGM2 0x00000080
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#define HWCAP2_FRINT 0x00000100
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#define HWCAP2_SVEI8MM 0x00000200
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#define HWCAP2_SVEF32MM 0x00000400
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#define HWCAP2_SVEF64MM 0x00000800
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#define HWCAP2_SVEBF16 0x00001000
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#define HWCAP2_I8MM 0x00002000
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#define HWCAP2_BF16 0x00004000
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#define HWCAP2_DGH 0x00008000
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#define HWCAP2_RNG 0x00010000
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#define HWCAP2_BTI 0x00020000
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#endif /* !_MACHINE_ELF_H_ */
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