1/*
2 * Copyright (C) 2002-2003  David McCullough <davidm@snapgear.com>
3 * Copyright (C) 1998       Kenneth Albanowski <kjahds@kjahds.com>
4 *                          The Silver Hammer Group, Ltd.
5 *
6 * This file provides the definitions and structures needed to
7 * support uClinux flat-format executables.
8 */
9
10#ifndef _UAPI_LINUX_FLAT_H
11#define _UAPI_LINUX_FLAT_H
12
13
14#define	FLAT_VERSION			0x00000004L
15
16#ifdef CONFIG_BINFMT_SHARED_FLAT
17#define	MAX_SHARED_LIBS			(4)
18#else
19#define	MAX_SHARED_LIBS			(1)
20#endif
21
22/*
23 * To make everything easier to port and manage cross platform
24 * development,  all fields are in network byte order.
25 */
26
27struct flat_hdr {
28	char magic[4];
29	unsigned long rev;          /* version (as above) */
30	unsigned long entry;        /* Offset of first executable instruction
31	                               with text segment from beginning of file */
32	unsigned long data_start;   /* Offset of data segment from beginning of
33	                               file */
34	unsigned long data_end;     /* Offset of end of data segment
35	                               from beginning of file */
36	unsigned long bss_end;      /* Offset of end of bss segment from beginning
37	                               of file */
38
39	/* (It is assumed that data_end through bss_end forms the bss segment.) */
40
41	unsigned long stack_size;   /* Size of stack, in bytes */
42	unsigned long reloc_start;  /* Offset of relocation records from
43	                               beginning of file */
44	unsigned long reloc_count;  /* Number of relocation records */
45	unsigned long flags;
46	unsigned long build_date;   /* When the program/library was built */
47	unsigned long filler[5];    /* Reservered, set to zero */
48};
49
50#define FLAT_FLAG_RAM    0x0001 /* load program entirely into RAM */
51#define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */
52#define FLAT_FLAG_GZIP   0x0004 /* all but the header is compressed */
53#define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */
54#define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */
55
56
57
58#endif /* _UAPI_LINUX_FLAT_H */
59