elf-i386.h

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/*-
 * Copyright (c) 1996-1997 John D. Polstra.
 * 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: src/sys/i386/include/elf.h,v 1.16 2004/08/02 19:12:17 dfr Exp $
 */

#ifndef _MACHINE_ELF_H_
#define _MACHINE_ELF_H_ 1

/*
 * ELF definitions for the i386 architecture.
 */

#ifdef _REACTOS_ELF_MACHINE_IS_TARGET

#ifndef __ELF_WORD_SIZE
#define __ELF_WORD_SIZE 32  /* Used by <elf/generic.h> */
#endif

#include <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. */

/*
 * The following non-standard values are used for passing information
 * from John Polstra's testbed program to the dynamic linker.  These
 * are expected to go away soon.
 *
 * Unfortunately, these overlap the Linux non-standard values, so they
 * must not be used in the same context.
 */
#define AT_BRK      10  /* Starting point for sbrk and brk. */
#define AT_DEBUG    11  /* Debugging level. */

/*
 * The following non-standard values are used in Linux ELF binaries.
 */
#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_COUNT    15  /* Count of defined aux entry 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

#endif /* _REACTOS_ELF_MACHINE_IS_TARGET */

/*
 * Relocation types.
 */

#define R_386_NONE  0   /* No relocation. */
#define R_386_32    1   /* Add symbol value. */
#define R_386_PC32  2   /* Add PC-relative symbol value. */
#define R_386_GOT32 3   /* Add PC-relative GOT offset. */
#define R_386_PLT32 4   /* Add PC-relative PLT offset. */
#define R_386_COPY  5   /* Copy data from shared object. */
#define R_386_GLOB_DAT  6   /* Set GOT entry to data address. */
#define R_386_JMP_SLOT  7   /* Set GOT entry to code address. */
#define R_386_RELATIVE  8   /* Add load address of shared object. */
#define R_386_GOTOFF    9   /* Add GOT-relative symbol address. */
#define R_386_GOTPC 10  /* Add PC-relative GOT table address. */
#define R_386_TLS_TPOFF 14  /* Negative offset in static TLS block */
#define R_386_TLS_IE    15  /* Absolute address of GOT for -ve static TLS */
#define R_386_TLS_GOTIE 16  /* GOT entry for negative static TLS block */
#define R_386_TLS_LE    17  /* Negative offset relative to static TLS */
#define R_386_TLS_GD    18  /* 32 bit offset to GOT (index,off) pair */
#define R_386_TLS_LDM   19  /* 32 bit offset to GOT (index,zero) pair */
#define R_386_TLS_GD_32 24  /* 32 bit offset to GOT (index,off) pair */
#define R_386_TLS_GD_PUSH 25    /* pushl instruction for Sun ABI GD sequence */
#define R_386_TLS_GD_CALL 26    /* call instruction for Sun ABI GD sequence */
#define R_386_TLS_GD_POP 27 /* popl instruction for Sun ABI GD sequence */
#define R_386_TLS_LDM_32 28 /* 32 bit offset to GOT (index,zero) pair */
#define R_386_TLS_LDM_PUSH 29   /* pushl instruction for Sun ABI LD sequence */
#define R_386_TLS_LDM_CALL 30   /* call instruction for Sun ABI LD sequence */
#define R_386_TLS_LDM_POP 31    /* popl instruction for Sun ABI LD sequence */
#define R_386_TLS_LDO_32 32 /* 32 bit offset from start of TLS block */
#define R_386_TLS_IE_32 33  /* 32 bit offset to GOT static TLS offset entry */
#define R_386_TLS_LE_32 34  /* 32 bit offset within static TLS block */
#define R_386_TLS_DTPMOD32 35   /* GOT entry containing TLS index */
#define R_386_TLS_DTPOFF32 36   /* GOT entry containing TLS offset */
#define R_386_TLS_TPOFF32 37    /* GOT entry of -ve static TLS offset */

#define R_386_COUNT 38  /* Count of defined relocation types. */

#endif /* !_MACHINE_ELF_H_ */