/*      $NetBSD: elf_machdep.h,v 1.21 2025/04/16 01:56:52 riastradh Exp $       */

/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
* 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 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 _MIPS_ELF_MACHDEP_H_
#define _MIPS_ELF_MACHDEP_H_

#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

#if ELFSIZE == 32
#define ELF32_MACHDEP_ID_CASES                                          \
               case EM_MIPS:                                           \
                       break;

#define ELF32_MACHDEP_ID        EM_MIPS
#elif ELFSIZE == 64
#define ELF64_MACHDEP_ID_CASES                                          \
               case EM_MIPS:                                           \
                       break;

#define ELF64_MACHDEP_ID        EM_MIPS
#endif

/* mips relocs. */

#define R_MIPS_NONE             0
#define R_MIPS_16               1
#define R_MIPS_32               2
#define R_MIPS_REL32            3
#define R_MIPS_REL              R_MIPS_REL32
#define R_MIPS_26               4
#define R_MIPS_HI16             5       /* high 16 bits of symbol value */
#define R_MIPS_LO16             6       /* low 16 bits of symbol value */
#define R_MIPS_GPREL16          7       /* GP-relative reference  */
#define R_MIPS_LITERAL          8       /* Reference to literal section  */
#define R_MIPS_GOT16            9       /* Reference to global offset table */
#define R_MIPS_GOT              R_MIPS_GOT16
#define R_MIPS_PC16             10      /* 16 bit PC relative reference */
#define R_MIPS_CALL16           11      /* 16 bit call thru glbl offset tbl */
#define R_MIPS_CALL             R_MIPS_CALL16
#define R_MIPS_GPREL32          12

/* 13, 14, 15 are not defined at this point. */
#define R_MIPS_UNUSED1          13
#define R_MIPS_UNUSED2          14
#define R_MIPS_UNUSED3          15

/*
* The remaining relocs are apparently part of the 64-bit Irix ELF ABI.
*/
#define R_MIPS_SHIFT5           16
#define R_MIPS_SHIFT6           17

#define R_MIPS_64               18
#define R_MIPS_GOT_DISP         19
#define R_MIPS_GOT_PAGE         20
#define R_MIPS_GOT_OFST         21
#define R_MIPS_GOT_HI16         22
#define R_MIPS_GOT_LO16         23
#define R_MIPS_SUB              24
#define R_MIPS_INSERT_A         25
#define R_MIPS_INSERT_B         26
#define R_MIPS_DELETE           27
#define R_MIPS_HIGHER           28
#define R_MIPS_HIGHEST          29
#define R_MIPS_CALL_HI16        30
#define R_MIPS_CALL_LO16        31
#define R_MIPS_SCN_DISP         32
#define R_MIPS_REL16            33
#define R_MIPS_ADD_IMMEDIATE    34
#define R_MIPS_PJUMP            35
#define R_MIPS_RELGOT           36
#define R_MIPS_JALR             37
/* TLS relocations */

#define R_MIPS_TLS_DTPMOD32     38      /* Module number 32 bit */
#define R_MIPS_TLS_DTPREL32     39      /* Module-relative offset 32 bit */
#define R_MIPS_TLS_DTPMOD64     40      /* Module number 64 bit */
#define R_MIPS_TLS_DTPREL64     41      /* Module-relative offset 64 bit */
#define R_MIPS_TLS_GD           42      /* 16 bit GOT offset for GD */
#define R_MIPS_TLS_LDM          43      /* 16 bit GOT offset for LDM */
#define R_MIPS_TLS_DTPREL_HI16  44      /* Module-relative offset, high 16 bits */
#define R_MIPS_TLS_DTPREL_LO16  45      /* Module-relative offset, low 16 bits */
#define R_MIPS_TLS_GOTTPREL     46      /* 16 bit GOT offset for IE */
#define R_MIPS_TLS_TPREL32      47      /* TP-relative offset, 32 bit */
#define R_MIPS_TLS_TPREL64      48      /* TP-relative offset, 64 bit */
#define R_MIPS_TLS_TPREL_HI16   49      /* TP-relative offset, high 16 bits */
#define R_MIPS_TLS_TPREL_LO16   50      /* TP-relative offset, low 16 bits */

#define R_MIPS_max              51

#define R_TYPE(name)            __CONCAT(R_MIPS_,name)

#define R_MIPS16_min            100
#define R_MIPS16_26             100
#define R_MIPS16_GPREL          101
#define R_MIPS16_GOT16          102
#define R_MIPS16_CALL16         103
#define R_MIPS16_HI16           104
#define R_MIPS16_LO16           105
#define R_MIPS16_max            106

#define R_MIPS_COPY             126
#define R_MIPS_JUMP_SLOT        127

/* mips dynamic tags */

#define DT_MIPS_RLD_VERSION     0x70000001
#define DT_MIPS_TIME_STAMP      0x70000002
#define DT_MIPS_ICHECKSUM       0x70000003
#define DT_MIPS_IVERSION        0x70000004
#define DT_MIPS_FLAGS           0x70000005
#define DT_MIPS_BASE_ADDRESS    0x70000006
#define DT_MIPS_CONFLICT        0x70000008
#define DT_MIPS_LIBLIST         0x70000009
#define DT_MIPS_CONFLICTNO      0x7000000b
#define DT_MIPS_LOCAL_GOTNO     0x7000000a      /* number of local got ents */
#define DT_MIPS_LIBLISTNO       0x70000010
#define DT_MIPS_SYMTABNO        0x70000011      /* number of .dynsym entries */
#define DT_MIPS_UNREFEXTNO      0x70000012
#define DT_MIPS_GOTSYM          0x70000013      /* first dynamic sym in got */
#define DT_MIPS_HIPAGENO        0x70000014
#define DT_MIPS_RLD_MAP         0x70000016      /* address of loader map */
#define DT_MIPS_PLTGOT          0x70000032
#define DT_MIPS_RWPLT           0x70000034
#define DT_MIPS_RLD_MAP_REL     0x70000035

/*
* ELF Flags
*/
#define EF_MIPS_PIC             0x00000002      /* Contains PIC code */
#define EF_MIPS_CPIC            0x00000004      /* STD PIC calling sequence */
#define EF_MIPS_ABI2            0x00000020      /* N32 */

#define EF_MIPS_ARCH_ASE        0x0f000000      /* Architectural extensions */
#define EF_MIPS_ARCH_MDMX       0x08000000      /* MDMX multimedia extension */
#define EF_MIPS_ARCH_M16        0x04000000      /* MIPS-16 ISA extensions */

#define EF_MIPS_ARCH            0xf0000000      /* Architecture field */
#define EF_MIPS_ARCH_1          0x00000000      /* -mips1 code */
#define EF_MIPS_ARCH_2          0x10000000      /* -mips2 code */
#define EF_MIPS_ARCH_3          0x20000000      /* -mips3 code */
#define EF_MIPS_ARCH_4          0x30000000      /* -mips4 code */
#define EF_MIPS_ARCH_5          0x40000000      /* -mips5 code */
#define EF_MIPS_ARCH_32         0x50000000      /* -mips32 code */
#define EF_MIPS_ARCH_64         0x60000000      /* -mips64 code */
#define EF_MIPS_ARCH_32R2       0x70000000      /* -mips32r2 code */
#define EF_MIPS_ARCH_64R2       0x80000000      /* -mips64r2 code */

#define EF_MIPS_ABI             0x0000f000
#define EF_MIPS_ABI_O32         0x00001000
#define EF_MIPS_ABI_O64         0x00002000
#define EF_MIPS_ABI_EABI32      0x00003000
#define EF_MIPS_ABI_EABI64      0x00004000

#if defined(__MIPSEB__)
#define ELF32_MACHDEP_ENDIANNESS        ELFDATA2MSB
#define ELF64_MACHDEP_ENDIANNESS        ELFDATA2MSB
#elif defined(__MIPSEL__)
#define ELF32_MACHDEP_ENDIANNESS        ELFDATA2LSB
#define ELF64_MACHDEP_ENDIANNESS        ELFDATA2LSB
#elif !defined(HAVE_NBTOOL_CONFIG_H)
#error neither __MIPSEL__ nor __MIPSEB__ are defined.
#endif

#ifdef _KERNEL
#ifdef _KERNEL_OPT
#include "opt_compat_netbsd.h"
#endif
#ifdef COMPAT_16
/*
* Up to 1.6, the ELF dynamic loader (ld.elf_so) was not relocatable.
* Tell the kernel ELF exec code not to try relocating the interpreter
* for dynamically-linked ELF binaries.
*/
#define ELF_INTERP_NON_RELOCATABLE
#endif /* COMPAT_16 */

/*
* We need to be able to include the ELF header so we can pick out the
* ABI being used.
*/
#ifdef ELFSIZE
#define ELF_MD_PROBE_FUNC       ELFNAME2(mips_netbsd,probe)
#define ELF_MD_COREDUMP_SETUP   ELFNAME2(coredump,setup)
#endif

struct exec_package;

int mips_netbsd_elf32_probe(struct lwp *, struct exec_package *, void *, char *,
       vaddr_t *);
void coredump_elf32_setup(struct lwp *, void *);

int mips_netbsd_elf64_probe(struct lwp *, struct exec_package *, void *, char *,
       vaddr_t *);
void coredump_elf64_setup(struct lwp *, void *);
#endif /* _KERNEL */

#endif /* _MIPS_ELF_MACHDEP_H_ */

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