elf.h

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/*-
 * Copyright (c) 2002-2018 The UbixOS Project.
 * All rights reserved.
 *
 * This was developed by Christopher W. Olsen for the UbixOS Project.
 *
 * 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, the following disclaimer and the list of authors.
 * 2) Redistributions in binary form must reproduce the above copyright notice, this list of
 *    conditions, the following disclaimer and the list of authors in the documentation and/or
 *    other materials provided with the distribution.
 * 3) Neither the name of the UbixOS Project nor the names of its contributors may be used to
 *    endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * 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 COPYRIGHT OWNER 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 _I386_ELF_H_
#define _I386_ELF_H_ 1
 
#if defined(__i386__) || defined(_MACHINE_ELF_WANT_32BIT)
 
/*
 * ELF definitions for the i386 architecture.
 */
 
#include <sys/elf32.h>  /* Definitions common to all 32 bit architectures. */
#if defined(__ELF_WORD_SIZE) && __ELF_WORD_SIZE == 64
#include <sys/elf64.h>  /* Definitions common to all 64 bit architectures. */
#endif
 
#ifndef __ELF_WORD_SIZE
#define __ELF_WORD_SIZE 32      /* Used by <sys/elf_generic.h> */
#endif
 
#include <sys/elf_generic.h>
 
#define ELF_ARCH        EM_386
 
#define ELF_MACHINE_OK(x) ((x) == EM_386 || (x) == EM_486)
 
/*
 * 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 {
    long a_val; /* Integer value. */
    void *a_ptr; /* Address. */
    void (*a_fcn)(void); /* Function pointer (not used). */
  }a_un;
}Elf32_Auxinfo;
 
#if __ELF_WORD_SIZE == 64
/* Fake for amd64 loader support */
typedef struct {
  int fake;
}Elf64_Auxinfo;
#endif
 
__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_COUNT        24      /* Count of defined aux entry types. */
 
/*
 * Relocation types.
 */
 
#define R_386_COUNT     38      /* Count of defined relocation types. */
 
/* Define "machine" characteristics */
#define ELF_TARG_CLASS  ELFCLASS32
#define ELF_TARG_DATA   ELFDATA2LSB
#define ELF_TARG_MACH   EM_386
#define ELF_TARG_VER    1
 
#define ET_DYN_LOAD_ADDR 0x01001000
 
#elif defined(__amd64__)
 
/*
 * ELF definitions for the AMD64 architecture.
 */
 
#ifndef __ELF_WORD_SIZE
#define __ELF_WORD_SIZE 64      /* Used by <sys/elf_generic.h> */
#endif
#include <sys/elf32.h>  /* Definitions common to all 32 bit architectures. */
#include <sys/elf64.h>  /* Definitions common to all 64 bit architectures. */
#include <sys/elf_generic.h>
 
#define ELF_ARCH        EM_X86_64
#define ELF_ARCH32      EM_386
 
#define ELF_MACHINE_OK(x) ((x) == EM_X86_64)
 
/*
 * 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. */
  }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_COUNT        24      /* Count of defined aux entry types. */
 
/*
 * Relocation types.
 */
 
#define R_X86_64_COUNT  24      /* Count of defined relocation types. */
 
/* Define "machine" characteristics */
#if __ELF_WORD_SIZE == 32
#define ELF_TARG_CLASS  ELFCLASS32
#else
#define ELF_TARG_CLASS  ELFCLASS64
#endif
#define ELF_TARG_DATA   ELFDATA2LSB
#define ELF_TARG_MACH   EM_X86_64
#define ELF_TARG_VER    1
 
#if __ELF_WORD_SIZE == 32
#define ET_DYN_LOAD_ADDR 0x01001000
#else
#define ET_DYN_LOAD_ADDR 0x01021000
#endif
 
#endif /* __i386__, __amd64__ */
 
#endif