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_USER_FLAT_H |
11 | #define LINUX_USER_FLAT_H |
12 | |
13 | #define FLAT_VERSION 0x00000004L |
14 | |
15 | #ifdef CONFIG_BINFMT_SHARED_FLAT |
16 | #define MAX_SHARED_LIBS (4) |
17 | #else |
18 | #define MAX_SHARED_LIBS (1) |
19 | #endif |
20 | |
21 | /* |
22 | * To make everything easier to port and manage cross platform |
23 | * development, all fields are in network byte order. |
24 | */ |
25 | |
26 | struct flat_hdr { |
27 | char magic[4]; |
28 | abi_ulong rev; /* version (as above) */ |
29 | abi_ulong entry; /* Offset of first executable instruction |
30 | with text segment from beginning of file */ |
31 | abi_ulong data_start; /* Offset of data segment from beginning of |
32 | file */ |
33 | abi_ulong data_end; /* Offset of end of data segment |
34 | from beginning of file */ |
35 | abi_ulong bss_end; /* Offset of end of bss segment from beginning |
36 | of file */ |
37 | |
38 | /* (It is assumed that data_end through bss_end forms the bss segment.) */ |
39 | |
40 | abi_ulong stack_size; /* Size of stack, in bytes */ |
41 | abi_ulong reloc_start; /* Offset of relocation records from |
42 | beginning of file */ |
43 | abi_ulong reloc_count; /* Number of relocation records */ |
44 | abi_ulong flags; |
45 | abi_ulong build_date; /* When the program/library was built */ |
46 | abi_ulong filler[5]; /* Reservered, set to zero */ |
47 | }; |
48 | |
49 | #define FLAT_FLAG_RAM 0x0001 /* load program entirely into RAM */ |
50 | #define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */ |
51 | #define FLAT_FLAG_GZIP 0x0004 /* all but the header is compressed */ |
52 | #define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */ |
53 | #define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */ |
54 | |
55 | |
56 | /* |
57 | * While it would be nice to keep this header clean, users of older |
58 | * tools still need this support in the kernel. So this section is |
59 | * purely for compatibility with old tool chains. |
60 | * |
61 | * DO NOT make changes or enhancements to the old format please, just work |
62 | * with the format above, except to fix bugs with old format support. |
63 | */ |
64 | |
65 | #define OLD_FLAT_VERSION 0x00000002L |
66 | #define OLD_FLAT_RELOC_TYPE_TEXT 0 |
67 | #define OLD_FLAT_RELOC_TYPE_DATA 1 |
68 | #define OLD_FLAT_RELOC_TYPE_BSS 2 |
69 | |
70 | # define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */ |
71 | |
72 | #endif |
73 | |