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  * Copyright (c) 2013 M. Warner Losh. All Rights Reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   23  * SUCH DAMAGE.
   24  *
   25  * $FreeBSD: releng/10.4/sys/mips/include/elf.h 294459 2016-01-20 21:06:24Z emaste $
   26  */
   27 
   28 /*-
   29  * Copyright (c) 2013 The NetBSD Foundation, Inc.
   30  * All rights reserved.
   31  *
   32  * Redistribution and use in source and binary forms, with or without
   33  * modification, are permitted provided that the following conditions
   34  * are met:
   35  * 1. Redistributions of source code must retain the above copyright
   36  *    notice, this list of conditions and the following disclaimer.
   37  * 2. Redistributions in binary form must reproduce the above copyright
   38  *    notice, this list of conditions and the following disclaimer in the
   39  *    documentation and/or other materials provided with the distribution.
   40  *
   41  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   42  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   43  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   44  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   45  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   46  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   47  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   48  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   49  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   51  * POSSIBILITY OF SUCH DAMAGE.
   52  *
   53  * See below starting with the line with $NetBSD...$ for code this applies to.
   54  */
   55 
   56 #ifndef __MIPS_ELF_H
   57 #define __MIPS_ELF_H
   58 
   59 /* FreeBSD specific bits - derived from FreeBSD specific files and changes to old elf.h */
   60 
   61 /*
   62  * Define __ELF_WORD_SIZE based on the ABI, if not defined yet. This sets
   63  * the proper defaults when we're not trying to do 32-bit on 64-bit systems.
   64  * We include both 32 and 64 bit versions so we can support multiple ABIs.
   65  */
   66 #ifndef __ELF_WORD_SIZE
   67 #if defined(__mips_n64)
   68 #define __ELF_WORD_SIZE 64
   69 #else
   70 #define __ELF_WORD_SIZE 32
   71 #endif
   72 #endif
   73 #include <sys/elf32.h>
   74 #include <sys/elf64.h>
   75 #include <sys/elf_generic.h>
   76 
   77 #define ELF_ARCH        EM_MIPS
   78 #define ELF_ARCH32      EM_MIPS
   79 
   80 #define ELF_MACHINE_OK(x)       ((x) == ELF_ARCH)
   81 
   82 /* Define "machine" characteristics */
   83 #if __ELF_WORD_SIZE == 32
   84 #define ELF_TARG_CLASS  ELFCLASS32
   85 #else
   86 #define ELF_TARG_CLASS  ELFCLASS64
   87 #endif
   88 #ifdef __MIPSEB__
   89 #define ELF_TARG_DATA   ELFDATA2MSB
   90 #else
   91 #define ELF_TARG_DATA   ELFDATA2LSB
   92 #endif
   93 #define ELF_TARG_MACH   EM_MIPS
   94 #define ELF_TARG_VER    1
   95 
   96 /*
   97  * Auxiliary vector entries for passing information to the interpreter.
   98  *
   99  * The i386 supplement to the SVR4 ABI specification names this "auxv_t",
  100  * but POSIX lays claim to all symbols ending with "_t".
  101  */
  102 typedef struct {        /* Auxiliary vector entry on initial stack */
  103         int     a_type;                 /* Entry type. */
  104         union {
  105                 int     a_val;          /* Integer value. */
  106                 void    *a_ptr;         /* Address. */
  107                 void    (*a_fcn)(void); /* Function pointer (not used). */
  108         } a_un;
  109 } Elf32_Auxinfo;
  110 
  111 typedef struct {        /* Auxiliary vector entry on initial stack */
  112         long    a_type;                 /* Entry type. */
  113         union {
  114                 long    a_val;          /* Integer value. */
  115                 void    *a_ptr;         /* Address. */
  116                 void    (*a_fcn)(void); /* Function pointer (not used). */
  117         } a_un;
  118 } Elf64_Auxinfo;
  119 
  120 __ElfType(Auxinfo);
  121 
  122 /* Values for a_type. */
  123 #define AT_NULL         0       /* Terminates the vector. */
  124 #define AT_IGNORE       1       /* Ignored entry. */
  125 #define AT_EXECFD       2       /* File descriptor of program to load. */
  126 #define AT_PHDR         3       /* Program header of program already loaded. */
  127 #define AT_PHENT        4       /* Size of each program header entry. */
  128 #define AT_PHNUM        5       /* Number of program header entries. */
  129 #define AT_PAGESZ       6       /* Page size in bytes. */
  130 #define AT_BASE         7       /* Interpreter's base address. */
  131 #define AT_FLAGS        8       /* Flags (unused for i386). */
  132 #define AT_ENTRY        9       /* Where interpreter should transfer control. */
  133 #define AT_NOTELF       10      /* Program is not ELF ?? */
  134 #define AT_UID          11      /* Real uid. */
  135 #define AT_EUID         12      /* Effective uid. */
  136 #define AT_GID          13      /* Real gid. */
  137 #define AT_EGID         14      /* Effective gid. */
  138 #define AT_EXECPATH     15      /* Path to the executable. */
  139 #define AT_CANARY       16      /* Canary for SSP */
  140 #define AT_CANARYLEN    17      /* Length of the canary. */
  141 #define AT_OSRELDATE    18      /* OSRELDATE. */
  142 #define AT_NCPUS        19      /* Number of CPUs. */
  143 #define AT_PAGESIZES    20      /* Pagesizes. */
  144 #define AT_PAGESIZESLEN 21      /* Number of pagesizes. */
  145 #define AT_TIMEKEEP     22      /* Pointer to timehands. */
  146 #define AT_STACKPROT    23      /* Initial stack protection. */
  147 
  148 #define AT_COUNT        24      /* Count of defined aux entry types. */
  149 
  150 #define ET_DYN_LOAD_ADDR 0x0120000
  151 
  152 /*
  153  * Constant to mark start of symtab/strtab saved by trampoline
  154  */
  155 #define SYMTAB_MAGIC    0x64656267
  156 
  157 /* from NetBSD's sys/mips/include/elf_machdep.h $NetBSD: elf_machdep.h,v 1.18 2013/05/23 21:39:49 christos Exp $ */
  158 
  159 /* mips relocs. */
  160 
  161 #define R_MIPS_NONE             0
  162 #define R_MIPS_16               1
  163 #define R_MIPS_32               2
  164 #define R_MIPS_REL32            3
  165 #define R_MIPS_REL              R_MIPS_REL32
  166 #define R_MIPS_26               4
  167 #define R_MIPS_HI16             5       /* high 16 bits of symbol value */
  168 #define R_MIPS_LO16             6       /* low 16 bits of symbol value */
  169 #define R_MIPS_GPREL16          7       /* GP-relative reference  */
  170 #define R_MIPS_LITERAL          8       /* Reference to literal section  */
  171 #define R_MIPS_GOT16            9       /* Reference to global offset table */
  172 #define R_MIPS_GOT              R_MIPS_GOT16
  173 #define R_MIPS_PC16             10      /* 16 bit PC relative reference */
  174 #define R_MIPS_CALL16           11      /* 16 bit call thru glbl offset tbl */
  175 #define R_MIPS_CALL             R_MIPS_CALL16
  176 #define R_MIPS_GPREL32          12
  177 
  178 /* 13, 14, 15 are not defined at this point. */
  179 #define R_MIPS_UNUSED1          13
  180 #define R_MIPS_UNUSED2          14
  181 #define R_MIPS_UNUSED3          15
  182 
  183 /*
  184  * The remaining relocs are apparently part of the 64-bit Irix ELF ABI.
  185  */
  186 #define R_MIPS_SHIFT5           16
  187 #define R_MIPS_SHIFT6           17
  188 
  189 #define R_MIPS_64               18
  190 #define R_MIPS_GOT_DISP         19
  191 #define R_MIPS_GOT_PAGE         20
  192 #define R_MIPS_GOT_OFST         21
  193 #define R_MIPS_GOT_HI16         22
  194 #define R_MIPS_GOT_LO16         23
  195 #define R_MIPS_SUB              24
  196 #define R_MIPS_INSERT_A         25
  197 #define R_MIPS_INSERT_B         26
  198 #define R_MIPS_DELETE           27
  199 #define R_MIPS_HIGHER           28
  200 #define R_MIPS_HIGHEST          29
  201 #define R_MIPS_CALL_HI16        30
  202 #define R_MIPS_CALL_LO16        31
  203 #define R_MIPS_SCN_DISP         32
  204 #define R_MIPS_REL16            33
  205 #define R_MIPS_ADD_IMMEDIATE    34
  206 #define R_MIPS_PJUMP            35
  207 #define R_MIPS_RELGOT           36
  208 #define R_MIPS_JALR             37
  209 /* TLS relocations */
  210 
  211 #define R_MIPS_TLS_DTPMOD32     38      /* Module number 32 bit */
  212 #define R_MIPS_TLS_DTPREL32     39      /* Module-relative offset 32 bit */
  213 #define R_MIPS_TLS_DTPMOD64     40      /* Module number 64 bit */
  214 #define R_MIPS_TLS_DTPREL64     41      /* Module-relative offset 64 bit */
  215 #define R_MIPS_TLS_GD           42      /* 16 bit GOT offset for GD */
  216 #define R_MIPS_TLS_LDM          43      /* 16 bit GOT offset for LDM */
  217 #define R_MIPS_TLS_DTPREL_HI16  44      /* Module-relative offset, high 16 bits */
  218 #define R_MIPS_TLS_DTPREL_LO16  45      /* Module-relative offset, low 16 bits */
  219 #define R_MIPS_TLS_GOTTPREL     46      /* 16 bit GOT offset for IE */
  220 #define R_MIPS_TLS_TPREL32      47      /* TP-relative offset, 32 bit */
  221 #define R_MIPS_TLS_TPREL64      48      /* TP-relative offset, 64 bit */
  222 #define R_MIPS_TLS_TPREL_HI16   49      /* TP-relative offset, high 16 bits */
  223 #define R_MIPS_TLS_TPREL_LO16   50      /* TP-relative offset, low 16 bits */
  224 
  225 #define R_MIPS_max              51
  226 
  227 #define R_TYPE(name)            __CONCAT(R_MIPS_,name)
  228 
  229 #define R_MIPS16_min            100
  230 #define R_MIPS16_26             100
  231 #define R_MIPS16_GPREL          101
  232 #define R_MIPS16_GOT16          102
  233 #define R_MIPS16_CALL16         103
  234 #define R_MIPS16_HI16           104
  235 #define R_MIPS16_LO16           105
  236 #define R_MIPS16_max            106
  237 
  238 #define R_MIPS_COPY             126
  239 #define R_MIPS_JUMP_SLOT        127
  240 
  241 /*
  242  * ELF Flags
  243  */
  244 
  245 #define EF_MIPS_ARCH_1          0x00000000      /* -mips1 code */
  246 #define EF_MIPS_ARCH_2          0x10000000      /* -mips2 code */
  247 #define EF_MIPS_ARCH_3          0x20000000      /* -mips3 code */
  248 #define EF_MIPS_ARCH_4          0x30000000      /* -mips4 code */
  249 #define EF_MIPS_ARCH_5          0x40000000      /* -mips5 code */
  250 #define EF_MIPS_ARCH_32         0x50000000      /* -mips32 code */
  251 #define EF_MIPS_ARCH_64         0x60000000      /* -mips64 code */
  252 #define EF_MIPS_ARCH_32R2       0x70000000      /* -mips32r2 code */
  253 #define EF_MIPS_ARCH_64R2       0x80000000      /* -mips64r2 code */
  254 
  255 #define EF_MIPS_ABI             0x0000f000
  256 #define EF_MIPS_ABI_O32         0x00001000
  257 #define EF_MIPS_ABI_O64         0x00002000
  258 #define EF_MIPS_ABI_EABI32      0x00003000
  259 #define EF_MIPS_ABI_EABI64      0x00004000
  260 
  261 #endif /* __MIPS_ELF_H */

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