/* $NetBSD: elf_machdep.h,v 1.10 2024/08/04 08:16:25 skrll Exp $ */

/*-
* 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 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;

#ifdef _LP64
#define KERN_ELFSIZE            64
#define ARCH_ELFSIZE            64      /* MD native binary size */
#else
#define KERN_ELFSIZE            32
#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_DTPMOD64    7
#define R_RISCV_TLS_DTPREL32    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_GPREL_I         47
#define R_RISCV_GPREL_S         48
#define R_RISCV_TPREL_I         49
#define R_RISCV_TPREL_S         50
#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_ */

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