The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/include/elf.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND BSD-2-Clause-NetBSD
    3  *
    4  * Copyright (c) 2013 M. Warner Losh. All Rights Reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  * $FreeBSD$
   28  */
   29 
   30 /*-
   31  * Copyright (c) 2013 The NetBSD Foundation, Inc.
   32  * All rights reserved.
   33  *
   34  * Redistribution and use in source and binary forms, with or without
   35  * modification, are permitted provided that the following conditions
   36  * are met:
   37  * 1. Redistributions of source code must retain the above copyright
   38  *    notice, this list of conditions and the following disclaimer.
   39  * 2. Redistributions in binary form must reproduce the above copyright
   40  *    notice, this list of conditions and the following disclaimer in the
   41  *    documentation and/or other materials provided with the distribution.
   42  *
   43  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   44  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   45  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   46  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   47  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   48  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   49  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   50  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   51  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   52  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   53  * POSSIBILITY OF SUCH DAMAGE.
   54  *
   55  * See below starting with the line with $NetBSD...$ for code this applies to.
   56  */
   57 
   58 #ifndef __MIPS_ELF_H
   59 #define __MIPS_ELF_H
   60 
   61 /* FreeBSD specific bits - derived from FreeBSD specific files and changes to old elf.h */
   62 
   63 /*
   64  * Define __ELF_WORD_SIZE based on the ABI, if not defined yet. This sets
   65  * the proper defaults when we're not trying to do 32-bit on 64-bit systems.
   66  * We include both 32 and 64 bit versions so we can support multiple ABIs.
   67  */
   68 #ifndef __ELF_WORD_SIZE
   69 #if defined(__mips_n64)
   70 #define __ELF_WORD_SIZE 64
   71 #else
   72 #define __ELF_WORD_SIZE 32
   73 #endif
   74 #endif
   75 #include <sys/elf32.h>
   76 #include <sys/elf64.h>
   77 #include <sys/elf_generic.h>
   78 
   79 #define ELF_ARCH        EM_MIPS
   80 #define ELF_ARCH32      EM_MIPS
   81 
   82 #define ELF_MACHINE_OK(x)       ((x) == ELF_ARCH)
   83 
   84 /* Define "machine" characteristics */
   85 #if __ELF_WORD_SIZE == 32
   86 #define ELF_TARG_CLASS  ELFCLASS32
   87 #else
   88 #define ELF_TARG_CLASS  ELFCLASS64
   89 #endif
   90 #ifdef __MIPSEB__
   91 #define ELF_TARG_DATA   ELFDATA2MSB
   92 #else
   93 #define ELF_TARG_DATA   ELFDATA2LSB
   94 #endif
   95 #define ELF_TARG_MACH   EM_MIPS
   96 #define ELF_TARG_VER    1
   97 
   98 /*
   99  * Auxiliary vector entries for passing information to the interpreter.
  100  *
  101  * The i386 supplement to the SVR4 ABI specification names this "auxv_t",
  102  * but POSIX lays claim to all symbols ending with "_t".
  103  */
  104 typedef struct {        /* Auxiliary vector entry on initial stack */
  105         int     a_type;                 /* Entry type. */
  106         union {
  107                 int     a_val;          /* Integer value. */
  108 #if defined(__mips_o32) || defined(__mips_n32)
  109                 void    *a_ptr;         /* Address. */
  110                 void    (*a_fcn)(void); /* Function pointer (not used). */
  111 #endif
  112         } a_un;
  113 } Elf32_Auxinfo;
  114 
  115 typedef struct {        /* Auxiliary vector entry on initial stack */
  116         long    a_type;                 /* Entry type. */
  117         union {
  118                 long    a_val;          /* Integer value. */
  119                 void    *a_ptr;         /* Address. */
  120                 void    (*a_fcn)(void); /* Function pointer (not used). */
  121         } a_un;
  122 } Elf64_Auxinfo;
  123 
  124 __ElfType(Auxinfo);
  125 
  126 /* Values for a_type. */
  127 #define AT_NULL         0       /* Terminates the vector. */
  128 #define AT_IGNORE       1       /* Ignored entry. */
  129 #define AT_EXECFD       2       /* File descriptor of program to load. */
  130 #define AT_PHDR         3       /* Program header of program already loaded. */
  131 #define AT_PHENT        4       /* Size of each program header entry. */
  132 #define AT_PHNUM        5       /* Number of program header entries. */
  133 #define AT_PAGESZ       6       /* Page size in bytes. */
  134 #define AT_BASE         7       /* Interpreter's base address. */
  135 #define AT_FLAGS        8       /* Flags (unused for i386). */
  136 #define AT_ENTRY        9       /* Where interpreter should transfer control. */
  137 #define AT_NOTELF       10      /* Program is not ELF ?? */
  138 #define AT_UID          11      /* Real uid. */
  139 #define AT_EUID         12      /* Effective uid. */
  140 #define AT_GID          13      /* Real gid. */
  141 #define AT_EGID         14      /* Effective gid. */
  142 #define AT_EXECPATH     15      /* Path to the executable. */
  143 #define AT_CANARY       16      /* Canary for SSP */
  144 #define AT_CANARYLEN    17      /* Length of the canary. */
  145 #define AT_OSRELDATE    18      /* OSRELDATE. */
  146 #define AT_NCPUS        19      /* Number of CPUs. */
  147 #define AT_PAGESIZES    20      /* Pagesizes. */
  148 #define AT_PAGESIZESLEN 21      /* Number of pagesizes. */
  149 #define AT_TIMEKEEP     22      /* Pointer to timehands. */
  150 #define AT_STACKPROT    23      /* Initial stack protection. */
  151 #define AT_EHDRFLAGS    24      /* e_flags field from elf hdr */
  152 #define AT_HWCAP        25      /* CPU feature flags. */
  153 #define AT_HWCAP2       26      /* CPU feature flags 2. */
  154 
  155 #define AT_COUNT        27      /* Count of defined aux entry types. */
  156 
  157 #define ET_DYN_LOAD_ADDR 0x0120000
  158 
  159 /*
  160  * Constant to mark start of symtab/strtab saved by trampoline
  161  */
  162 #define SYMTAB_MAGIC    0x64656267
  163 
  164 /* from NetBSD's sys/mips/include/elf_machdep.h $NetBSD: elf_machdep.h,v 1.18 2013/05/23 21:39:49 christos Exp $ */
  165 
  166 /* mips relocs. */
  167 
  168 #define R_MIPS_NONE             0
  169 #define R_MIPS_16               1
  170 #define R_MIPS_32               2
  171 #define R_MIPS_REL32            3
  172 #define R_MIPS_REL              R_MIPS_REL32
  173 #define R_MIPS_26               4
  174 #define R_MIPS_HI16             5       /* high 16 bits of symbol value */
  175 #define R_MIPS_LO16             6       /* low 16 bits of symbol value */
  176 #define R_MIPS_GPREL16          7       /* GP-relative reference  */
  177 #define R_MIPS_LITERAL          8       /* Reference to literal section  */
  178 #define R_MIPS_GOT16            9       /* Reference to global offset table */
  179 #define R_MIPS_GOT              R_MIPS_GOT16
  180 #define R_MIPS_PC16             10      /* 16 bit PC relative reference */
  181 #define R_MIPS_CALL16           11      /* 16 bit call thru glbl offset tbl */
  182 #define R_MIPS_CALL             R_MIPS_CALL16
  183 #define R_MIPS_GPREL32          12
  184 
  185 /* 13, 14, 15 are not defined at this point. */
  186 #define R_MIPS_UNUSED1          13
  187 #define R_MIPS_UNUSED2          14
  188 #define R_MIPS_UNUSED3          15
  189 
  190 /*
  191  * The remaining relocs are apparently part of the 64-bit Irix ELF ABI.
  192  */
  193 #define R_MIPS_SHIFT5           16
  194 #define R_MIPS_SHIFT6           17
  195 
  196 #define R_MIPS_64               18
  197 #define R_MIPS_GOT_DISP         19
  198 #define R_MIPS_GOT_PAGE         20
  199 #define R_MIPS_GOT_OFST         21
  200 #define R_MIPS_GOT_HI16         22
  201 #define R_MIPS_GOT_LO16         23
  202 #define R_MIPS_SUB              24
  203 #define R_MIPS_INSERT_A         25
  204 #define R_MIPS_INSERT_B         26
  205 #define R_MIPS_DELETE           27
  206 #define R_MIPS_HIGHER           28
  207 #define R_MIPS_HIGHEST          29
  208 #define R_MIPS_CALL_HI16        30
  209 #define R_MIPS_CALL_LO16        31
  210 #define R_MIPS_SCN_DISP         32
  211 #define R_MIPS_REL16            33
  212 #define R_MIPS_ADD_IMMEDIATE    34
  213 #define R_MIPS_PJUMP            35
  214 #define R_MIPS_RELGOT           36
  215 #define R_MIPS_JALR             37
  216 /* TLS relocations */
  217 
  218 #define R_MIPS_TLS_DTPMOD32     38      /* Module number 32 bit */
  219 #define R_MIPS_TLS_DTPREL32     39      /* Module-relative offset 32 bit */
  220 #define R_MIPS_TLS_DTPMOD64     40      /* Module number 64 bit */
  221 #define R_MIPS_TLS_DTPREL64     41      /* Module-relative offset 64 bit */
  222 #define R_MIPS_TLS_GD           42      /* 16 bit GOT offset for GD */
  223 #define R_MIPS_TLS_LDM          43      /* 16 bit GOT offset for LDM */
  224 #define R_MIPS_TLS_DTPREL_HI16  44      /* Module-relative offset, high 16 bits */
  225 #define R_MIPS_TLS_DTPREL_LO16  45      /* Module-relative offset, low 16 bits */
  226 #define R_MIPS_TLS_GOTTPREL     46      /* 16 bit GOT offset for IE */
  227 #define R_MIPS_TLS_TPREL32      47      /* TP-relative offset, 32 bit */
  228 #define R_MIPS_TLS_TPREL64      48      /* TP-relative offset, 64 bit */
  229 #define R_MIPS_TLS_TPREL_HI16   49      /* TP-relative offset, high 16 bits */
  230 #define R_MIPS_TLS_TPREL_LO16   50      /* TP-relative offset, low 16 bits */
  231 
  232 #define R_MIPS_max              51
  233 
  234 #define R_TYPE(name)            __CONCAT(R_MIPS_,name)
  235 
  236 #define R_MIPS16_min            100
  237 #define R_MIPS16_26             100
  238 #define R_MIPS16_GPREL          101
  239 #define R_MIPS16_GOT16          102
  240 #define R_MIPS16_CALL16         103
  241 #define R_MIPS16_HI16           104
  242 #define R_MIPS16_LO16           105
  243 #define R_MIPS16_max            106
  244 
  245 #define R_MIPS_COPY             126
  246 #define R_MIPS_JUMP_SLOT        127
  247 
  248 #endif /* __MIPS_ELF_H */

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