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/*

 * Copyright (C) 2002-2003  David McCullough <davidm@snapgear.com>

 * Copyright (C) 1998       Kenneth Albanowski <kjahds@kjahds.com>

 *                          The Silver Hammer Group, Ltd.

 *

 * This file provides the definitions and structures needed to

 * support uClinux flat-format executables.

 */

#ifndef _LINUX_FLAT_H

#define _LINUX_FLAT_H

#ifdef __KERNEL__

#include <asm/flat.h>

#endif

#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 */

#ifdef __KERNEL__ /* so systems without linux headers can compile the apps */

/*

 * While it would be nice to keep this header clean,  users of older

 * tools still need this support in the kernel.  So this section is

 * purely for compatibility with old tool chains.

 *

 * DO NOT make changes or enhancements to the old format please,  just work

 *        with the format above,  except to fix bugs with old format support.

 */

#include <asm/byteorder.h>

#define OLD_FLAT_VERSION                        0x00000002L

#define OLD_FLAT_RELOC_TYPE_TEXT        0

#define OLD_FLAT_RELOC_TYPE_DATA        1

#define OLD_FLAT_RELOC_TYPE_BSS         2

typedef union {

        unsigned long   value;

        struct {

# if defined(mc68000) && !defined(CONFIG_COLDFIRE)

                signed long offset : 30;

                unsigned long type : 2;

#       define OLD_FLAT_FLAG_RAM    0x1 /* load program entirely into RAM */

# elif defined(__BIG_ENDIAN_BITFIELD)

                unsigned long type : 2;

                signed long offset : 30;

#       define OLD_FLAT_FLAG_RAM    0x1 /* load program entirely into RAM */

# elif defined(__LITTLE_ENDIAN_BITFIELD)

                signed long offset : 30;

                unsigned long type : 2;

#       define OLD_FLAT_FLAG_RAM    0x1 /* load program entirely into RAM */

# else

#       error "Unknown bitfield order for flat files."

# endif

        } reloc;

} flat_v2_reloc_t;

#endif /* __KERNEL__ */

#endif /* _LINUX_FLAT_H */