LXR linux/arch/arm/boot/compressed/vmlinux.lds.S

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 *  Copyright (C) 2000 Russell King
   4 */
   5#include <asm/vmlinux.lds.h>
   6
   7#ifdef CONFIG_CPU_ENDIAN_BE8
   8#define ZIMAGE_MAGIC(x) ( (((x) >> 24) & 0x000000ff) | \
   9                          (((x) >>  8) & 0x0000ff00) | \
  10                          (((x) <<  8) & 0x00ff0000) | \
  11                          (((x) << 24) & 0xff000000) )
  12#else
  13#define ZIMAGE_MAGIC(x) (x)
  14#endif
  15
  16OUTPUT_ARCH(arm)
  17ENTRY(_start)
  18SECTIONS
  19{
  20  /DISCARD/ : {
  21    COMMON_DISCARDS
  22    *(.ARM.exidx*)
  23    *(.ARM.extab*)
  24    *(.note.*)
  25    *(.rel.*)
  26    /*
  27     * Discard any r/w data - this produces a link error if we have any,
  28     * which is required for PIC decompression.  Local data generates
  29     * GOTOFF relocations, which prevents it being relocated independently
  30     * of the text/got segments.
  31     */
  32    *(.data)
  33  }
  34
  35  . = TEXT_START;
  36  _text = .;
  37
  38  .text : {
  39    _start = .;
  40    *(.start)
  41    *(.text)
  42    *(.text.*)
  43    ARM_STUBS_TEXT
  44  }
  45  .table : ALIGN(4) {
  46    _table_start = .;
  47    LONG(ZIMAGE_MAGIC(6))
  48    LONG(ZIMAGE_MAGIC(0x5a534c4b))
  49    LONG(ZIMAGE_MAGIC(__piggy_size_addr - _start))
  50    LONG(ZIMAGE_MAGIC(_kernel_bss_size))
  51    LONG(ZIMAGE_MAGIC(TEXT_OFFSET))
  52    LONG(ZIMAGE_MAGIC(MALLOC_SIZE))
  53    LONG(0)
  54    _table_end = .;
  55  }
  56  .rodata : {
  57    *(.rodata)
  58    *(.rodata.*)
  59    *(.data.rel.ro)
  60  }
  61  .piggydata : {
  62    *(.piggydata)
  63    __piggy_size_addr = . - 4;
  64  }
  65
  66  . = ALIGN(4);
  67  _etext = .;
  68
  69  .got.plt              : { *(.got.plt) }
  70#ifndef CONFIG_EFI_STUB
  71  _got_start = .;
  72  .got                  : { *(.got) }
  73  _got_end = .;
  74#endif
  75
  76  /* ensure the zImage file size is always a multiple of 64 bits */
  77  /* (without a dummy byte, ld just ignores the empty section) */
  78  .pad                  : { BYTE(0); . = ALIGN(8); }
  79
  80#ifdef CONFIG_EFI_STUB
  81  .data : ALIGN(4096) {
  82    __pecoff_data_start = .;
  83    _got_start = .;
  84    *(.got)
  85    _got_end = .;
  86    /*
  87     * The EFI stub always executes from RAM, and runs strictly before the
  88     * decompressor, so we can make an exception for its r/w data, and keep it
  89     */
  90    *(.data.efistub .bss.efistub)
  91    __pecoff_data_end = .;
  92
  93    /*
  94     * PE/COFF mandates a file size which is a multiple of 512 bytes if the
  95     * section size equals or exceeds 4 KB
  96     */
  97    . = ALIGN(512);
  98  }
  99  __pecoff_data_rawsize = . - ADDR(.data);
 100#endif
 101
 102  _edata = .;
 103
 104  /*
 105   * The image_end section appears after any additional loadable sections
 106   * that the linker may decide to insert in the binary image.  Having
 107   * this symbol allows further debug in the near future.
 108   */
 109  .image_end (NOLOAD) : {
 110    /*
 111     * EFI requires that the image is aligned to 512 bytes, and appended
 112     * DTB requires that we know where the end of the image is.  Ensure
 113     * that both are satisfied by ensuring that there are no additional
 114     * sections emitted into the decompressor image.
 115     */
 116    _edata_real = .;
 117  }
 118
 119  _magic_sig = ZIMAGE_MAGIC(0x016f2818);
 120  _magic_start = ZIMAGE_MAGIC(_start);
 121  _magic_end = ZIMAGE_MAGIC(_edata);
 122  _magic_table = ZIMAGE_MAGIC(_table_start - _start);
 123
 124  . = BSS_START;
 125  __bss_start = .;
 126  .bss                  : { *(.bss) }
 127  _end = .;
 128
 129  . = ALIGN(8);         /* the stack must be 64-bit aligned */
 130  .stack                : { *(.stack) }
 131
 132  PROVIDE(__pecoff_data_size = ALIGN(512) - ADDR(.data));
 133  PROVIDE(__pecoff_end = ALIGN(512));
 134
 135  STABS_DEBUG
 136  DWARF_DEBUG
 137  ARM_DETAILS
 138
 139  ARM_ASSERTS
 140}
 141ASSERT(_edata_real == _edata, "error: zImage file size is incorrect");
 142