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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | /* |
| 2 | * Copyright (C) 2002-2003 David McCullough <davidm@snapgear.com> |
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| 3 | * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> |
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| 4 | * The Silver Hammer Group, Ltd. |
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| 5 | * |
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| 6 | * This file provides the definitions and structures needed to |
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| 7 | * support uClinux flat-format executables. |
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| 8 | */ |
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| 9 | |||
| 10 | #ifndef _LINUX_FLAT_H |
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| 11 | #define _LINUX_FLAT_H |
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| 12 | |||
| 13 | #ifdef __KERNEL__ |
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| 14 | #include <asm/flat.h> |
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| 15 | #endif |
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| 16 | |||
| 17 | #define FLAT_VERSION 0x00000004L |
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| 18 | |||
| 19 | #ifdef CONFIG_BINFMT_SHARED_FLAT |
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| 20 | #define MAX_SHARED_LIBS (4) |
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| 21 | #else |
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| 22 | #define MAX_SHARED_LIBS (1) |
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| 23 | #endif |
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| 24 | |||
| 25 | /* |
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| 26 | * To make everything easier to port and manage cross platform |
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| 27 | * development, all fields are in network byte order. |
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| 28 | */ |
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| 29 | |||
| 30 | struct flat_hdr { |
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| 31 | char magic[4]; |
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| 32 | unsigned long rev; /* version (as above) */ |
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| 33 | unsigned long entry; /* Offset of first executable instruction |
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| 34 | with text segment from beginning of file */ |
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| 35 | unsigned long data_start; /* Offset of data segment from beginning of |
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| 36 | file */ |
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| 37 | unsigned long data_end; /* Offset of end of data segment |
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| 38 | from beginning of file */ |
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| 39 | unsigned long bss_end; /* Offset of end of bss segment from beginning |
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| 40 | of file */ |
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| 41 | |||
| 42 | /* (It is assumed that data_end through bss_end forms the bss segment.) */ |
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| 43 | |||
| 44 | unsigned long stack_size; /* Size of stack, in bytes */ |
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| 45 | unsigned long reloc_start; /* Offset of relocation records from |
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| 46 | beginning of file */ |
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| 47 | unsigned long reloc_count; /* Number of relocation records */ |
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| 48 | unsigned long flags; |
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| 49 | unsigned long build_date; /* When the program/library was built */ |
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| 50 | unsigned long filler[5]; /* Reservered, set to zero */ |
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| 51 | }; |
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| 52 | |||
| 53 | #define FLAT_FLAG_RAM 0x0001 /* load program entirely into RAM */ |
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| 54 | #define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */ |
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| 55 | #define FLAT_FLAG_GZIP 0x0004 /* all but the header is compressed */ |
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| 56 | #define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */ |
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| 57 | #define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */ |
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| 58 | |||
| 59 | |||
| 60 | #ifdef __KERNEL__ /* so systems without linux headers can compile the apps */ |
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| 61 | /* |
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| 62 | * While it would be nice to keep this header clean, users of older |
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| 63 | * tools still need this support in the kernel. So this section is |
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| 64 | * purely for compatibility with old tool chains. |
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| 65 | * |
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| 66 | * DO NOT make changes or enhancements to the old format please, just work |
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| 67 | * with the format above, except to fix bugs with old format support. |
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| 68 | */ |
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| 69 | |||
| 70 | #include <asm/byteorder.h> |
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| 71 | |||
| 72 | #define OLD_FLAT_VERSION 0x00000002L |
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| 73 | #define OLD_FLAT_RELOC_TYPE_TEXT 0 |
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| 74 | #define OLD_FLAT_RELOC_TYPE_DATA 1 |
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| 75 | #define OLD_FLAT_RELOC_TYPE_BSS 2 |
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| 76 | |||
| 77 | typedef union { |
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| 78 | unsigned long value; |
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| 79 | struct { |
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| 80 | # if defined(mc68000) && !defined(CONFIG_COLDFIRE) |
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| 81 | signed long offset : 30; |
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| 82 | unsigned long type : 2; |
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| 83 | # define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */ |
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| 84 | # elif defined(__BIG_ENDIAN_BITFIELD) |
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| 85 | unsigned long type : 2; |
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| 86 | signed long offset : 30; |
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| 87 | # define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */ |
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| 88 | # elif defined(__LITTLE_ENDIAN_BITFIELD) |
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| 89 | signed long offset : 30; |
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| 90 | unsigned long type : 2; |
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| 91 | # define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */ |
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| 92 | # else |
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| 93 | # error "Unknown bitfield order for flat files." |
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| 94 | # endif |
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| 95 | } reloc; |
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| 96 | } flat_v2_reloc_t; |
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| 97 | |||
| 98 | #endif /* __KERNEL__ */ |
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| 99 | |||
| 100 | #endif /* _LINUX_FLAT_H */ |