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

     /*
      * Copyright (c) 2013 M. Warner Losh. 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 AUTHOR 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 AUTHOR 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.
     *
     * $FreeBSD$
     */
    
    /*-
     * 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.
     *
     * See below starting with the line with $NetBSD...$ for code this applies to.
     */
    
    #ifndef __MIPS_ELF_H
    #define __MIPS_ELF_H
    
    /* FreeBSD specific bits - derived from FreeBSD specific files and changes to old elf.h */
    
    /*
     * Define __ELF_WORD_SIZE based on the ABI, if not defined yet. This sets
     * the proper defaults when we're not trying to do 32-bit on 64-bit systems.
     * We include both 32 and 64 bit versions so we can support multiple ABIs.
     */
    #ifndef __ELF_WORD_SIZE
    #if defined(__mips_n64)
    #define __ELF_WORD_SIZE 64
    #else
    #define __ELF_WORD_SIZE 32
    #endif
    #endif
    #include <sys/elf32.h>
    #include <sys/elf64.h>
    #include <sys/elf_generic.h>
    
    #define ELF_ARCH        EM_MIPS
    #define ELF_ARCH32      EM_MIPS
    
    #define ELF_MACHINE_OK(x)       ((x) == ELF_ARCH)
    
    /* Define "machine" characteristics */
    #if __ELF_WORD_SIZE == 32
    #define ELF_TARG_CLASS  ELFCLASS32
    #else
    #define ELF_TARG_CLASS  ELFCLASS64
    #endif
    #ifdef __MIPSEB__
    #define ELF_TARG_DATA   ELFDATA2MSB
    #else
    #define ELF_TARG_DATA   ELFDATA2LSB
    #endif
    #define ELF_TARG_MACH   EM_MIPS
    #define ELF_TARG_VER    1
    
    /*
     * Auxiliary vector entries for passing information to the interpreter.
     *
     * The i386 supplement to the SVR4 ABI specification names this "auxv_t",
    * but POSIX lays claim to all symbols ending with "_t".
    */
   typedef struct {        /* Auxiliary vector entry on initial stack */
           int     a_type;                 /* Entry type. */
           union {
                   int     a_val;          /* Integer value. */
                   void    *a_ptr;         /* Address. */
                   void    (*a_fcn)(void); /* Function pointer (not used). */
           } a_un;
   } Elf32_Auxinfo;
   
   typedef struct {        /* Auxiliary vector entry on initial stack */
           long    a_type;                 /* Entry type. */
           union {
                   long    a_val;          /* Integer value. */
                   void    *a_ptr;         /* Address. */
                   void    (*a_fcn)(void); /* Function pointer (not used). */
           } a_un;
   } Elf64_Auxinfo;
   
   __ElfType(Auxinfo);
   
   /* Values for a_type. */
   #define AT_NULL         0       /* Terminates the vector. */
   #define AT_IGNORE       1       /* Ignored entry. */
   #define AT_EXECFD       2       /* File descriptor of program to load. */
   #define AT_PHDR         3       /* Program header of program already loaded. */
   #define AT_PHENT        4       /* Size of each program header entry. */
   #define AT_PHNUM        5       /* Number of program header entries. */
   #define AT_PAGESZ       6       /* Page size in bytes. */
   #define AT_BASE         7       /* Interpreter's base address. */
   #define AT_FLAGS        8       /* Flags (unused for i386). */
   #define AT_ENTRY        9       /* Where interpreter should transfer control. */
   #define AT_NOTELF       10      /* Program is not ELF ?? */
   #define AT_UID          11      /* Real uid. */
   #define AT_EUID         12      /* Effective uid. */
   #define AT_GID          13      /* Real gid. */
   #define AT_EGID         14      /* Effective gid. */
   #define AT_EXECPATH     15      /* Path to the executable. */
   #define AT_CANARY       16      /* Canary for SSP */
   #define AT_CANARYLEN    17      /* Length of the canary. */
   #define AT_OSRELDATE    18      /* OSRELDATE. */
   #define AT_NCPUS        19      /* Number of CPUs. */
   #define AT_PAGESIZES    20      /* Pagesizes. */
   #define AT_PAGESIZESLEN 21      /* Number of pagesizes. */
   #define AT_TIMEKEEP     22      /* Pointer to timehands. */
   #define AT_STACKPROT    23      /* Initial stack protection. */
   #define AT_EHDRFLAGS    24      /* e_flags field from elf hdr */
   #define AT_HWCAP        25      /* CPU feature flags. */
   #define AT_HWCAP2       26      /* CPU feature flags 2. */
   
   #define AT_COUNT        27      /* Count of defined aux entry types. */
   
   #define ET_DYN_LOAD_ADDR 0x0120000
   
   /*
    * Constant to mark start of symtab/strtab saved by trampoline
    */
   #define SYMTAB_MAGIC    0x64656267
   
   /* from NetBSD's sys/mips/include/elf_machdep.h $NetBSD: elf_machdep.h,v 1.18 2013/05/23 21:39:49 christos Exp $ */
   
   /* 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
   
   /*
    * ELF Flags
    */
   
   #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
   
   #endif /* __MIPS_ELF_H */

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