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elf-i386.h

/*-
 * 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 ___k_kLdrFmts_elf_i386_h___
#define ___k_kLdrFmts_elf_i386_h___

#if 0 /** @todo Auxiliary vector entries. */

/*
 * 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

/* 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. */

#endif /* [todo] */


/*
 * 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


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