elf_machdep.h

/* $NetBSD: elf_machdep.h,v 1.6 2017/11/06 03:47:48 christos Exp $ */

/*-
 * Copyright (c) 2019 Hesham Almatary
 *
 * Copyright (c) 2014 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Matt Thomas of 3am Software Foundry.
 *
 * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 _RISCV_ELF_MACHDEP_H_
#define _RISCV_ELF_MACHDEP_H_

#define EM_RISCV                243
#define ELF32_MACHDEP_ID        EM_RISCV
#define ELF64_MACHDEP_ID        EM_RISCV

#define ELF32_MACHDEP_ENDIANNESS    ELFDATA2LSB
#define ELF64_MACHDEP_ENDIANNESS    ELFDATA2LSB

#define ELF32_MACHDEP_ID_CASES      \
        case EM_RISCV:      \
            break;

#define ELF64_MACHDEP_ID_CASES      \
        case EM_RISCV:      \
            break;

#define KERN_ELFSIZE        32
#ifdef _LP64
#define ARCH_ELFSIZE        64  /* MD native binary size */
#else
#define ARCH_ELFSIZE        32  /* MD native binary size */
#endif

/* Processor specific flags for the ELF header e_flags field.  */

/* Processor specific relocation types */

#define R_RISCV_NONE        0
#define R_RISCV_32      1   // A
#define R_RISCV_64      2
#define R_RISCV_RELATIVE    3
#define R_RISCV_COPY        4
#define R_RISCV_JMP_SLOT    5
#define R_RISCV_TLS_DTPMOD32    6
#define R_RISCV_TLS_DTPREL32    7
#define R_RISCV_TLS_DTPMOD64    8
#define R_RISCV_TLS_DTPREL64    9
#define R_RISCV_TLS_TPREL32 10
#define R_RISCV_TLS_TPREL64 11

/* The rest are not used by the dynamic linker */
#define R_RISCV_BRANCH      16  // (A - P) & 0xffff
#define R_RISCV_JAL     17  // A & 0xff
#define R_RISCV_CALL        18  // (A - P) & 0xff
#define R_RISCV_CALL_PLT    19
#define R_RISCV_GOT_HI20    20
#define R_RISCV_TLS_GOT_HI20    21
#define R_RISCV_TLS_GD_HI20 22
#define R_RISCV_PCREL_HI20  23
#define R_RISCV_PCREL_LO12_I    24
#define R_RISCV_PCREL_LO12_S    25
#define R_RISCV_HI20        26  // A & 0xffff
#define R_RISCV_LO12_I      27  // (A >> 16) & 0xffff
#define R_RISCV_LO12_S      28  // (S + A - P) >> 2
#define R_RISCV_TPREL_HI20  29
#define R_RISCV_TPREL_LO12_I    30
#define R_RISCV_TPREL_LO12_S    31
#define R_RISCV_TPREL_ADD   32
#define R_RISCV_ADD8        33
#define R_RISCV_ADD16       34
#define R_RISCV_ADD32       35
#define R_RISCV_ADD64       36
#define R_RISCV_SUB8        37
#define R_RISCV_SUB16       38
#define R_RISCV_SUB32       39
#define R_RISCV_SUB64       40
#define R_RISCV_GNU_VTINHERIT   41  // A & 0xffff
#define R_RISCV_GNU_VTENTRY 42
#define R_RISCV_ALIGN       43
#define R_RISCV_RVC_BRANCH  44
#define R_RISCV_RVC_JUMP    45
#define R_RISCV_RVC_LUI   46

#define R_RISCV_RELAX       51
#define R_RISCV_SUB6        52
#define R_RISCV_SET6        53
#define R_RISCV_SET8        54
#define R_RISCV_SET16       55
#define R_RISCV_SET32       56

#define R_RISCV_32_PCREL    57

/* These are aliases we can use R_TYPESZ */
#define R_RISCV_ADDR32      R_RISCV_32
#define R_RISCV_ADDR64      R_RISCV_64

#define R_TYPE(name)        R_RISCV_ ## name
#if ELFSIZE == 32
#define R_TYPESZ(name)      R_RISCV_ ## name ## 32
#else
#define R_TYPESZ(name)      R_RISCV_ ## name ## 64
#endif

#ifdef _KERNEL
#ifdef ELFSIZE
#define ELF_MD_PROBE_FUNC       ELFNAME2(cpu_netbsd,probe)
#endif

struct exec_package;

int cpu_netbsd_elf32_probe(struct lwp *, struct exec_package *, void *, char *,
        vaddr_t *);

int cpu_netbsd_elf64_probe(struct lwp *, struct exec_package *, void *, char *,
        vaddr_t *);

#endif /* _KERNEL */

#endif /* _RISCV_ELF_MACHDEP_H_ */