Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * Copyright (C) 2002-2003 David McCullough <davidm@snapgear.com> | |
4 | * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> | |
5 | * The Silver Hammer Group, Ltd. | |
6 | * | |
7 | * This file provides the definitions and structures needed to | |
8 | * support uClinux flat-format executables. | |
9 | */ | |
1da177e4 LT |
10 | #ifndef _LINUX_FLAT_H |
11 | #define _LINUX_FLAT_H | |
12 | ||
06d2bfed CH |
13 | #define FLAT_VERSION 0x00000004L |
14 | ||
06d2bfed CH |
15 | /* |
16 | * To make everything easier to port and manage cross platform | |
17 | * development, all fields are in network byte order. | |
18 | */ | |
19 | ||
20 | struct flat_hdr { | |
34b4664a CH |
21 | char magic[4]; |
22 | __be32 rev; /* version (as above) */ | |
23 | __be32 entry; /* Offset of first executable instruction | |
24 | with text segment from beginning of file */ | |
25 | __be32 data_start; /* Offset of data segment from beginning of | |
26 | file */ | |
27 | __be32 data_end; /* Offset of end of data segment from beginning | |
28 | of file */ | |
29 | __be32 bss_end; /* Offset of end of bss segment from beginning | |
30 | of file */ | |
06d2bfed CH |
31 | |
32 | /* (It is assumed that data_end through bss_end forms the bss segment.) */ | |
33 | ||
34b4664a CH |
34 | __be32 stack_size; /* Size of stack, in bytes */ |
35 | __be32 reloc_start; /* Offset of relocation records from beginning of | |
36 | file */ | |
37 | __be32 reloc_count; /* Number of relocation records */ | |
38 | __be32 flags; | |
39 | __be32 build_date; /* When the program/library was built */ | |
40 | __u32 filler[5]; /* Reservered, set to zero */ | |
06d2bfed CH |
41 | }; |
42 | ||
43 | #define FLAT_FLAG_RAM 0x0001 /* load program entirely into RAM */ | |
44 | #define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */ | |
45 | #define FLAT_FLAG_GZIP 0x0004 /* all but the header is compressed */ | |
46 | #define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */ | |
47 | #define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */ | |
1da177e4 | 48 | |
1da177e4 LT |
49 | /* |
50 | * While it would be nice to keep this header clean, users of older | |
51 | * tools still need this support in the kernel. So this section is | |
52 | * purely for compatibility with old tool chains. | |
53 | * | |
54 | * DO NOT make changes or enhancements to the old format please, just work | |
55 | * with the format above, except to fix bugs with old format support. | |
56 | */ | |
57 | ||
1da177e4 LT |
58 | #define OLD_FLAT_VERSION 0x00000002L |
59 | #define OLD_FLAT_RELOC_TYPE_TEXT 0 | |
60 | #define OLD_FLAT_RELOC_TYPE_DATA 1 | |
61 | #define OLD_FLAT_RELOC_TYPE_BSS 2 | |
62 | ||
63 | typedef union { | |
34b4664a | 64 | u32 value; |
1da177e4 | 65 | struct { |
3f8b76a6 CH |
66 | #if defined(__LITTLE_ENDIAN_BITFIELD) || \ |
67 | (defined(mc68000) && !defined(CONFIG_COLDFIRE)) | |
34b4664a CH |
68 | s32 offset : 30; |
69 | u32 type : 2; | |
1da177e4 | 70 | # elif defined(__BIG_ENDIAN_BITFIELD) |
34b4664a CH |
71 | u32 type : 2; |
72 | s32 offset : 30; | |
1da177e4 LT |
73 | # else |
74 | # error "Unknown bitfield order for flat files." | |
75 | # endif | |
76 | } reloc; | |
77 | } flat_v2_reloc_t; | |
78 | ||
1da177e4 | 79 | #endif /* _LINUX_FLAT_H */ |