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55e7cff44c
The linker can sometimes add additional sections to the zImage ELF file which results in the zImage binary being larger than expected. This causes appended DT blobs to fail. Verify that the zImage binary is the expected size, and fail the build if this is not the case. We need to include the .data.rel.ro section in the image as the RiscPC build includes font data that contains a small amount of data in this section. Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
138 lines
3.4 KiB
ArmAsm
138 lines
3.4 KiB
ArmAsm
/*
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* Copyright (C) 2000 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifdef CONFIG_CPU_ENDIAN_BE8
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#define ZIMAGE_MAGIC(x) ( (((x) >> 24) & 0x000000ff) | \
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(((x) >> 8) & 0x0000ff00) | \
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(((x) << 8) & 0x00ff0000) | \
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(((x) << 24) & 0xff000000) )
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#else
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#define ZIMAGE_MAGIC(x) (x)
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#endif
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OUTPUT_ARCH(arm)
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ENTRY(_start)
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SECTIONS
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{
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/DISCARD/ : {
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*(.ARM.exidx*)
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*(.ARM.extab*)
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/*
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* Discard any r/w data - this produces a link error if we have any,
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* which is required for PIC decompression. Local data generates
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* GOTOFF relocations, which prevents it being relocated independently
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* of the text/got segments.
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*/
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*(.data)
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}
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. = TEXT_START;
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_text = .;
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.text : {
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_start = .;
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*(.start)
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*(.text)
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*(.text.*)
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*(.fixup)
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*(.gnu.warning)
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*(.glue_7t)
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*(.glue_7)
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}
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.table : ALIGN(4) {
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_table_start = .;
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LONG(ZIMAGE_MAGIC(2))
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LONG(ZIMAGE_MAGIC(0x5a534c4b))
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LONG(ZIMAGE_MAGIC(__piggy_size_addr - _start))
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LONG(ZIMAGE_MAGIC(_kernel_bss_size))
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LONG(0)
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_table_end = .;
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}
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.rodata : {
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*(.rodata)
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*(.rodata.*)
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*(.data.rel.ro)
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}
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.piggydata : {
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*(.piggydata)
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__piggy_size_addr = . - 4;
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}
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. = ALIGN(4);
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_etext = .;
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.got.plt : { *(.got.plt) }
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_got_start = .;
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.got : { *(.got) }
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_got_end = .;
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/* ensure the zImage file size is always a multiple of 64 bits */
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/* (without a dummy byte, ld just ignores the empty section) */
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.pad : { BYTE(0); . = ALIGN(8); }
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#ifdef CONFIG_EFI_STUB
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.data : ALIGN(4096) {
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__pecoff_data_start = .;
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/*
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* The EFI stub always executes from RAM, and runs strictly before the
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* decompressor, so we can make an exception for its r/w data, and keep it
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*/
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*(.data.efistub)
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__pecoff_data_end = .;
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/*
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* PE/COFF mandates a file size which is a multiple of 512 bytes if the
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* section size equals or exceeds 4 KB
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*/
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. = ALIGN(512);
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}
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__pecoff_data_rawsize = . - ADDR(.data);
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#endif
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_edata = .;
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/*
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* The image_end section appears after any additional loadable sections
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* that the linker may decide to insert in the binary image. Having
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* this symbol allows further debug in the near future.
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*/
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.image_end (NOLOAD) : {
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/*
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* EFI requires that the image is aligned to 512 bytes, and appended
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* DTB requires that we know where the end of the image is. Ensure
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* that both are satisfied by ensuring that there are no additional
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* sections emitted into the decompressor image.
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*/
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_edata_real = .;
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}
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_magic_sig = ZIMAGE_MAGIC(0x016f2818);
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_magic_start = ZIMAGE_MAGIC(_start);
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_magic_end = ZIMAGE_MAGIC(_edata);
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_magic_table = ZIMAGE_MAGIC(_table_start - _start);
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. = BSS_START;
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__bss_start = .;
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.bss : { *(.bss) }
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_end = .;
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. = ALIGN(8); /* the stack must be 64-bit aligned */
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.stack : { *(.stack) }
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PROVIDE(__pecoff_data_size = ALIGN(512) - ADDR(.data));
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PROVIDE(__pecoff_end = ALIGN(512));
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.comment 0 : { *(.comment) }
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}
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ASSERT(_edata_real == _edata, "error: zImage file size is incorrect");
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