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David Howells607ca462012-10-13 10:46:48 +01001/*
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 */