flat.h

embedded system 檔案格式轉換工具源代碼

/* Copyright (C) 1998  Kenneth Albanowski <[e-mail]>
 *                     The Silver Hammer Group, Ltd.
 *
 */

#ifndef _LINUX_FLAT_H
#define _LINUX_FLAT_H

#define	FLAT_VERSION			0x00000004L

/*
 * 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 filler[6];    /* 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) */


/*
 * 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 /* _LINUX_FLAT_H */