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
   6#ifdef CONFIG_CPU_ENDIAN_BE8
   7#define ZIMAGE_MAGIC(x) ( (((x) >> 24) & 0x000000ff) | \
   8                          (((x) >>  8) & 0x0000ff00) | \
   9                          (((x) <<  8) & 0x00ff0000) | \
  10                          (((x) << 24) & 0xff000000) )
  11#else
  12#define ZIMAGE_MAGIC(x) (x)
  13#endif
  14
  15OUTPUT_ARCH(arm)
  16ENTRY(_start)
  17SECTIONS
  18{
  19  /DISCARD/ : {
  20    *(.ARM.exidx*)
  21    *(.ARM.extab*)
  22    /*
  23     * Discard any r/w data - this produces a link error if we have any,
  24     * which is required for PIC decompression.  Local data generates
  25     * GOTOFF relocations, which prevents it being relocated independently
  26     * of the text/got segments.
  27     */
  28    *(.data)
  29  }
  30
  31  . = TEXT_START;
  32  _text = .;
  33
  34  .text : {
  35    _start = .;
  36    *(.start)
  37    *(.text)
  38    *(.text.*)
  39    *(.gnu.warning)
  40    *(.glue_7t)
  41    *(.glue_7)
  42  }
  43  .table : ALIGN(4) {
  44    _table_start = .;
  45    LONG(ZIMAGE_MAGIC(4))
  46    LONG(ZIMAGE_MAGIC(0x5a534c4b))
  47    LONG(ZIMAGE_MAGIC(__piggy_size_addr - _start))
  48    LONG(ZIMAGE_MAGIC(_kernel_bss_size))
  49    LONG(0)
  50    _table_end = .;
  51  }
  52  .rodata : {
  53    *(.rodata)
  54    *(.rodata.*)
  55    *(.data.rel.ro)
  56  }
  57  .piggydata : {
  58    *(.piggydata)
  59    __piggy_size_addr = . - 4;
  60  }
  61
  62  . = ALIGN(4);
  63  _etext = .;
  64
  65  .got.plt              : { *(.got.plt) }
  66#ifndef CONFIG_EFI_STUB
  67  _got_start = .;
  68  .got                  : { *(.got) }
  69  _got_end = .;
  70#endif
  71
  72  /* ensure the zImage file size is always a multiple of 64 bits */
  73  /* (without a dummy byte, ld just ignores the empty section) */
  74  .pad                  : { BYTE(0); . = ALIGN(8); }
  75
  76#ifdef CONFIG_EFI_STUB
  77  .data : ALIGN(4096) {
  78    __pecoff_data_start = .;
  79    _got_start = .;
  80    *(.got)
  81    _got_end = .;
  82    /*
  83     * The EFI stub always executes from RAM, and runs strictly before the
  84     * decompressor, so we can make an exception for its r/w data, and keep it
  85     */
  86    *(.data.efistub .bss.efistub)
  87    __pecoff_data_end = .;
  88
  89    /*
  90     * PE/COFF mandates a file size which is a multiple of 512 bytes if the
  91     * section size equals or exceeds 4 KB
  92     */
  93    . = ALIGN(512);
  94  }
  95  __pecoff_data_rawsize = . - ADDR(.data);
  96#endif
  97
  98  _edata = .;
  99
 100  /*
 101   * The image_end section appears after any additional loadable sections
 102   * that the linker may decide to insert in the binary image.  Having
 103   * this symbol allows further debug in the near future.
 104   */
 105  .image_end (NOLOAD) : {
 106    /*
 107     * EFI requires that the image is aligned to 512 bytes, and appended
 108     * DTB requires that we know where the end of the image is.  Ensure
 109     * that both are satisfied by ensuring that there are no additional
 110     * sections emitted into the decompressor image.
 111     */
 112    _edata_real = .;
 113  }
 114
 115  _magic_sig = ZIMAGE_MAGIC(0x016f2818);
 116  _magic_start = ZIMAGE_MAGIC(_start);
 117  _magic_end = ZIMAGE_MAGIC(_edata);
 118  _magic_table = ZIMAGE_MAGIC(_table_start - _start);
 119
 120  . = BSS_START;
 121  __bss_start = .;
 122  .bss                  : { *(.bss) }
 123  _end = .;
 124
 125  . = ALIGN(8);         /* the stack must be 64-bit aligned */
 126  .stack                : { *(.stack) }
 127
 128  PROVIDE(__pecoff_data_size = ALIGN(512) - ADDR(.data));
 129  PROVIDE(__pecoff_end = ALIGN(512));
 130
 131  .stab 0               : { *(.stab) }
 132  .stabstr 0            : { *(.stabstr) }
 133  .stab.excl 0          : { *(.stab.excl) }
 134  .stab.exclstr 0       : { *(.stab.exclstr) }
 135  .stab.index 0         : { *(.stab.index) }
 136  .stab.indexstr 0      : { *(.stab.indexstr) }
 137  .comment 0            : { *(.comment) }
 138}
 139ASSERT(_edata_real == _edata, "error: zImage file size is incorrect");
 140