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79 lines
2.6 KiB
79 lines
2.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 2002-2003 David McCullough <[email protected]> |
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* Copyright (C) 1998 Kenneth Albanowski <[email protected]> |
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* The Silver Hammer Group, Ltd. |
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* |
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* This file provides the definitions and structures needed to |
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* support uClinux flat-format executables. |
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*/ |
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#ifndef _LINUX_FLAT_H |
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#define _LINUX_FLAT_H |
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#define FLAT_VERSION 0x00000004L |
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/* |
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* To make everything easier to port and manage cross platform |
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* development, all fields are in network byte order. |
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*/ |
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struct flat_hdr { |
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char magic[4]; |
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__be32 rev; /* version (as above) */ |
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__be32 entry; /* Offset of first executable instruction |
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with text segment from beginning of file */ |
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__be32 data_start; /* Offset of data segment from beginning of |
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file */ |
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__be32 data_end; /* Offset of end of data segment from beginning |
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of file */ |
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__be32 bss_end; /* Offset of end of bss segment from beginning |
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of file */ |
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/* (It is assumed that data_end through bss_end forms the bss segment.) */ |
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__be32 stack_size; /* Size of stack, in bytes */ |
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__be32 reloc_start; /* Offset of relocation records from beginning of |
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file */ |
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__be32 reloc_count; /* Number of relocation records */ |
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__be32 flags; |
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__be32 build_date; /* When the program/library was built */ |
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__u32 filler[5]; /* Reservered, set to zero */ |
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}; |
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#define FLAT_FLAG_RAM 0x0001 /* load program entirely into RAM */ |
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#define FLAT_FLAG_GOTPIC 0x0002 /* program is PIC with GOT */ |
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#define FLAT_FLAG_GZIP 0x0004 /* all but the header is compressed */ |
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#define FLAT_FLAG_GZDATA 0x0008 /* only data/relocs are compressed (for XIP) */ |
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#define FLAT_FLAG_KTRACE 0x0010 /* output useful kernel trace for debugging */ |
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/* |
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* While it would be nice to keep this header clean, users of older |
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* tools still need this support in the kernel. So this section is |
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* purely for compatibility with old tool chains. |
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* |
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* DO NOT make changes or enhancements to the old format please, just work |
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* with the format above, except to fix bugs with old format support. |
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*/ |
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#define OLD_FLAT_VERSION 0x00000002L |
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#define OLD_FLAT_RELOC_TYPE_TEXT 0 |
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#define OLD_FLAT_RELOC_TYPE_DATA 1 |
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#define OLD_FLAT_RELOC_TYPE_BSS 2 |
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typedef union { |
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u32 value; |
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struct { |
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#if defined(__LITTLE_ENDIAN_BITFIELD) || \ |
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(defined(mc68000) && !defined(CONFIG_COLDFIRE)) |
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s32 offset : 30; |
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u32 type : 2; |
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# elif defined(__BIG_ENDIAN_BITFIELD) |
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u32 type : 2; |
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s32 offset : 30; |
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# else |
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# error "Unknown bitfield order for flat files." |
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# endif |
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} reloc; |
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} flat_v2_reloc_t; |
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#endif /* _LINUX_FLAT_H */
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