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a6819c1bd0
Ever since the bFLT format support was added in 2006, there has been a chunk of code in the file guarded by CONFIG_BINFMT_SHARED_FLAT which is supposedly for shared library support. This is not enabled and it's not possible to enable it, because if you do you'll run into the "#error needs checking" in the calc_reloc() function. Similarly, CONFIG_BINFMT_ZFLAT exists but can't be enabled because of an "#error code needs checking" in load_flat_file(). This code is obviously unfinished and has never been used; nobody in the intervening 18 years has complained about this or fixed it, so just delete the dead code. If anybody ever wants the feature they can always pull it out of git, or (perhaps better) write it from scratch based on the current Linux bFLT loader rather than the one of 18 years ago. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-id: 20240411115313.680433-1-peter.maydell@linaro.org
70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/*
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* Copyright (C) 2002-2003 David McCullough <davidm@snapgear.com>
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* Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>
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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_USER_FLAT_H
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#define LINUX_USER_FLAT_H
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#define FLAT_VERSION 0x00000004L
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/* QEMU doesn't support bflt shared libraries */
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#define MAX_SHARED_LIBS (1)
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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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abi_ulong rev; /* version (as above) */
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abi_ulong entry; /* Offset of first executable instruction
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with text segment from beginning of file */
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abi_ulong data_start; /* Offset of data segment from beginning of
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file */
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abi_ulong data_end; /* Offset of end of data segment
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from beginning of file */
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abi_ulong 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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abi_ulong stack_size; /* Size of stack, in bytes */
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abi_ulong reloc_start; /* Offset of relocation records from
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beginning of file */
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abi_ulong reloc_count; /* Number of relocation records */
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abi_ulong flags;
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abi_ulong build_date; /* When the program/library was built */
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abi_ulong filler[5]; /* Reserved, 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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# define OLD_FLAT_FLAG_RAM 0x1 /* load program entirely into RAM */
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#endif
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