projects / linux-block.git / blame
| 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 | ||
| 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 | unsigned long rev; /* version (as above) */ | |
| 29 | unsigned long entry; /* Offset of first executable instruction | |
| 30 | with text segment from beginning of file */ | |
| 31 | unsigned long data_start; /* Offset of data segment from beginning of | |
| 32 | file */ | |
| 33 | unsigned long data_end; /* Offset of end of data segment | |
| 34 | from beginning of file */ | |
| 35 | unsigned long 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 | unsigned long stack_size; /* Size of stack, in bytes */ | |
| 41 | unsigned long reloc_start; /* Offset of relocation records from | |
| 42 | beginning of file */ | |
| 43 | unsigned long reloc_count; /* Number of relocation records */ | |
| 44 | unsigned long flags; | |
| 45 | unsigned long build_date; /* When the program/library was built */ | |
| 46 | unsigned long 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 */ | |
| 1da177e4 | 54 | |
| 1da177e4 LT |
55 | /* |
| 56 | * While it would be nice to keep this header clean, users of older | |
| 57 | * tools still need this support in the kernel. So this section is | |
| 58 | * purely for compatibility with old tool chains. | |
| 59 | * | |
| 60 | * DO NOT make changes or enhancements to the old format please, just work | |
| 61 | * with the format above, except to fix bugs with old format support. | |
| 62 | */ | |
| 63 | ||
| 1da177e4 LT |
64 | #define OLD_FLAT_VERSION 0x00000002L |
| 65 | #define OLD_FLAT_RELOC_TYPE_TEXT 0 | |
| 66 | #define OLD_FLAT_RELOC_TYPE_DATA 1 | |
| 67 | #define OLD_FLAT_RELOC_TYPE_BSS 2 | |
| 68 | ||
| 69 | typedef union { | |
| 70 | unsigned long value; | |
| 71 | struct { | |
| 3f8b76a6 CH |
72 | #if defined(__LITTLE_ENDIAN_BITFIELD) || \ |
| 73 | (defined(mc68000) && !defined(CONFIG_COLDFIRE)) | |
| 1da177e4 LT |
74 | signed long offset : 30; |
| 75 | unsigned long type : 2; | |
| 1da177e4 LT |
76 | # elif defined(__BIG_ENDIAN_BITFIELD) |
| 77 | unsigned long type : 2; | |
| 78 | signed long offset : 30; | |
| 1da177e4 LT |
79 | # else |
| 80 | # error "Unknown bitfield order for flat files." | |
| 81 | # endif | |
| 82 | } reloc; | |
| 83 | } flat_v2_reloc_t; | |
| 84 | ||
| 1da177e4 | 85 | #endif /* _LINUX_FLAT_H */ |