flat.h

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/*
 * Copyright (C) 2002-2003  David McCullough <[email protected]>
 * Copyright (C) 1998       Kenneth Albanowski <[email protected]>
 *                          The Silver Hammer Group, Ltd.
 *
 * This file provides the definitions and structures needed to
 * support uClinux flat-format executables.
 */

#ifndef _UAPI_LINUX_FLAT_H
#define _UAPI_LINUX_FLAT_H


#define FLAT_VERSION            0x00000004L

#ifdef CONFIG_BINFMT_SHARED_FLAT
#define MAX_SHARED_LIBS         (4)
#else
#define MAX_SHARED_LIBS         (1)
#endif

/*
 * To make everything easier to port and manage cross platform
 * development,  all fields are in network byte order.
 */

struct flat_hdr {
    char magic[4];
    unsigned long rev;          /* version (as above) */
    unsigned long entry;        /* Offset of first executable instruction
                                   with text segment from beginning of file */
    unsigned long data_start;   /* Offset of data segment from beginning of
                                   file */
    unsigned long data_end;     /* Offset of end of data segment
                                   from beginning of file */
    unsigned long bss_end;      /* Offset of end of bss segment from beginning
                                   of file */

    /* (It is assumed that data_end through bss_end forms the bss segment.) */

    unsigned long stack_size;   /* Size of stack, in bytes */
    unsigned long reloc_start;  /* Offset of relocation records from
                                   beginning of file */
    unsigned long reloc_count;  /* Number of relocation records */
    unsigned long flags;       
    unsigned long build_date;   /* When the program/library was built */
    unsigned long filler[5];    /* Reservered, set to zero */
};

#define FLAT_FLAG_RAM    0x0001 /* load program entirely into RAM */
#define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */
#define FLAT_FLAG_GZIP   0x0004 /* all but the header is compressed */
#define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */
#define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */



#endif /* _UAPI_LINUX_FLAT_H */