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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 _LINUX_FLAT_H |
11 | #define _LINUX_FLAT_H |
12 | |
13 | #ifdef __KERNEL__ |
14 | #include <asm/flat.h> |
15 | #endif |
16 | |
17 | #define FLAT_VERSION 0x00000004L |
18 | |
19 | #ifdef CONFIG_BINFMT_SHARED_FLAT |
20 | #define MAX_SHARED_LIBS (4) |
21 | #else |
22 | #define MAX_SHARED_LIBS (1) |
23 | #endif |
24 | |
25 | /* |
26 | * To make everything easier to port and manage cross platform |
27 | * development, all fields are in network byte order. |
28 | */ |
29 | |
30 | struct flat_hdr { |
31 | char magic[4]; |
32 | unsigned long rev; /* version (as above) */ |
33 | unsigned long entry; /* Offset of first executable instruction |
34 | with text segment from beginning of file */ |
35 | unsigned long data_start; /* Offset of data segment from beginning of |
36 | file */ |
37 | unsigned long data_end; /* Offset of end of data segment |
38 | from beginning of file */ |
39 | unsigned long bss_end; /* Offset of end of bss segment from beginning |
40 | of file */ |
41 | |
42 | /* (It is assumed that data_end through bss_end forms the bss segment.) */ |
43 | |
44 | unsigned long stack_size; /* Size of stack, in bytes */ |
45 | unsigned long reloc_start; /* Offset of relocation records from |
46 | beginning of file */ |
47 | unsigned long reloc_count; /* Number of relocation records */ |
48 | unsigned long flags; |
49 | unsigned long build_date; /* When the program/library was built */ |
50 | unsigned long filler[5]; /* Reservered, set to zero */ |
51 | }; |
52 | |
53 | #define FLAT_FLAG_RAM 0x0001 /* load program entirely into RAM */ |
54 | #define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */ |
55 | #define FLAT_FLAG_GZIP 0x0004 /* all but the header is compressed */ |
56 | #define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */ |
57 | #define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */ |
58 | |
59 | |
60 | #ifdef __KERNEL__ /* so systems without linux headers can compile the apps */ |
61 | /* |
62 | * While it would be nice to keep this header clean, users of older |
63 | * tools still need this support in the kernel. So this section is |
64 | * purely for compatibility with old tool chains. |
65 | * |
66 | * DO NOT make changes or enhancements to the old format please, just work |
67 | * with the format above, except to fix bugs with old format support. |
68 | */ |
69 | |
70 | #include <asm/byteorder.h> |
71 | |
72 | #define OLD_FLAT_VERSION 0x00000002L |
73 | #define OLD_FLAT_RELOC_TYPE_TEXT 0 |
74 | #define OLD_FLAT_RELOC_TYPE_DATA 1 |
75 | #define OLD_FLAT_RELOC_TYPE_BSS 2 |
76 | |
77 | typedef union { |
78 | unsigned long value; |
79 | struct { |
80 | # if defined(mc68000) && !defined(CONFIG_COLDFIRE) |
81 | signed long offset : 30; |
82 | unsigned long type : 2; |
83 | # define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */ |
84 | # elif defined(__BIG_ENDIAN_BITFIELD) |
85 | unsigned long type : 2; |
86 | signed long offset : 30; |
87 | # define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */ |
88 | # elif defined(__LITTLE_ENDIAN_BITFIELD) |
89 | signed long offset : 30; |
90 | unsigned long type : 2; |
91 | # define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */ |
92 | # else |
93 | # error "Unknown bitfield order for flat files." |
94 | # endif |
95 | } reloc; |
96 | } flat_v2_reloc_t; |
97 | |
98 | #endif /* __KERNEL__ */ |
99 | |
100 | #endif /* _LINUX_FLAT_H */ |
101 |
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