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/*
* Copyright (C) 2002-2005 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.
*
* This is Free Software, under the GNU Public Licence v2 or greater.
*
*/
#ifndef _LINUX_FLAT_H
#define _LINUX_FLAT_H
#ifdef __KERNEL__
#include <linux/types.h>
#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];
uint32_t rev; /* version (as above) */
uint32_t entry; /* Offset of first executable instruction
with text segment from beginning of file */
uint32_t data_start; /* Offset of data segment from beginning of
file */
uint32_t data_end; /* Offset of end of data segment from beginning
of file */
uint32_t 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.) */
uint32_t stack_size; /* Size of stack, in bytes */
uint32_t reloc_start; /* Offset of relocation records from beginning
of file */
uint32_t reloc_count; /* Number of relocation records */
uint32_t flags;
uint32_t build_date; /* When the program/library was built */
uint32_t 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 {
uint32_t value;
struct {
# if defined(mc68000) && !defined(CONFIG_COLDFIRE)
int32_t offset : 30;
uint32_t type : 2;
# define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */
# elif defined(__BIG_ENDIAN_BITFIELD)
uint32_t type : 2;
int32_t offset : 30;
# define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */
# elif defined(__LITTLE_ENDIAN_BITFIELD)
int32_t offset : 30;
uint32_t 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 */
/* this __MUST__ be at the VERY end of the file - do NOT move!!
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* end:
* vi: tabstop=8 shiftwidth=4 textwidth=79 noexpandtab
*/
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