| 1 | /* |
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| 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 | |
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| 10 | #ifndef _LINUX_FLAT_H |
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| 11 | #define _LINUX_FLAT_H |
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| 12 | |
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| 13 | #define FLAT_VERSION 0x00000004L |
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| 14 | |
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| 15 | #ifdef CONFIG_BINFMT_SHARED_FLAT |
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| 16 | #define MAX_SHARED_LIBS (4) |
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| 17 | #else |
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| 18 | #define MAX_SHARED_LIBS (1) |
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| 19 | #endif |
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| 20 | |
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| 21 | /* |
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| 22 | * To make everything easier to port and manage cross platform |
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| 23 | * development, all fields are in network byte order. |
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| 24 | */ |
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| 25 | |
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| 26 | struct flat_hdr { |
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| 27 | char magic[4]; |
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| 28 | unsigned long rev; /* version (as above) */ |
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| 29 | unsigned long entry; /* Offset of first executable instruction |
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| 30 | with text segment from beginning of file */ |
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| 31 | unsigned long data_start; /* Offset of data segment from beginning of |
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| 32 | file */ |
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| 33 | unsigned long data_end; /* Offset of end of data segment |
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| 34 | from beginning of file */ |
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| 35 | unsigned long bss_end; /* Offset of end of bss segment from beginning |
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| 36 | of file */ |
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| 37 | |
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| 38 | /* (It is assumed that data_end through bss_end forms the bss segment.) */ |
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| 39 | |
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| 40 | unsigned long stack_size; /* Size of stack, in bytes */ |
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| 41 | unsigned long reloc_start; /* Offset of relocation records from |
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| 42 | beginning of file */ |
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| 43 | unsigned long reloc_count; /* Number of relocation records */ |
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| 44 | unsigned long flags; |
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| 45 | unsigned long build_date; /* When the program/library was built */ |
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| 46 | unsigned long filler[5]; /* Reservered, set to zero */ |
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| 47 | }; |
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| 48 | |
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| 49 | #define FLAT_FLAG_RAM 0x0001 /* load program entirely into RAM */ |
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| 50 | #define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */ |
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| 51 | #define FLAT_FLAG_GZIP 0x0004 /* all but the header is compressed */ |
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| 52 | #define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */ |
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| 53 | #define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */ |
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| 54 | |
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| 55 | |
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| 56 | #endif /* _LINUX_FLAT_H */ |
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