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
  15 OUTPUT_ARCH(arm)
  16 ENTRY(_start)
  17 SECTIONS
  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   _got_start = .;
  67   .got                  : { *(.got) }
  68   _got_end = .;
  69
  70   /* ensure the zImage file size is always a multiple of 64 bits */
  71   /* (without a dummy byte, ld just ignores the empty section) */
  72   .pad                  : { BYTE(0); . = ALIGN(8); }
  73
  74 #ifdef CONFIG_EFI_STUB
  75   .data : ALIGN(4096) {
  76     __pecoff_data_start = .;
  77     /*
  78      * The EFI stub always executes from RAM, and runs strictly before the
  79      * decompressor, so we can make an exception for its r/w data, and keep it
  80      */
  81     *(.data.efistub .bss.efistub)
  82     __pecoff_data_end = .;
  83
  84     /*
  85      * PE/COFF mandates a file size which is a multiple of 512 bytes if the
  86      * section size equals or exceeds 4 KB
  87      */
  88     . = ALIGN(512);
  89   }
  90   __pecoff_data_rawsize = . - ADDR(.data);
  91 #endif
  92
  93   _edata = .;
  94
  95   /*
  96    * The image_end section appears after any additional loadable sections
  97    * that the linker may decide to insert in the binary image.  Having
  98    * this symbol allows further debug in the near future.
  99    */
 100   .image_end (NOLOAD) : {
 101     /*
 102      * EFI requires that the image is aligned to 512 bytes, and appended
 103      * DTB requires that we know where the end of the image is.  Ensure
 104      * that both are satisfied by ensuring that there are no additional
 105      * sections emitted into the decompressor image.
 106      */
 107     _edata_real = .;
 108   }
 109
 110   _magic_sig = ZIMAGE_MAGIC(0x016f2818);
 111   _magic_start = ZIMAGE_MAGIC(_start);
 112   _magic_end = ZIMAGE_MAGIC(_edata);
 113   _magic_table = ZIMAGE_MAGIC(_table_start - _start);
 114
 115   . = BSS_START;
 116   __bss_start = .;
 117   .bss                  : { *(.bss) }
 118   _end = .;
 119
 120   . = ALIGN(8);         /* the stack must be 64-bit aligned */
 121   .stack                : { *(.stack) }
 122
 123   PROVIDE(__pecoff_data_size = ALIGN(512) - ADDR(.data));
 124   PROVIDE(__pecoff_end = ALIGN(512));
 125
 126   .stab 0               : { *(.stab) }
 127   .stabstr 0            : { *(.stabstr) }
 128   .stab.excl 0          : { *(.stab.excl) }
 129   .stab.exclstr 0       : { *(.stab.exclstr) }
 130   .stab.index 0         : { *(.stab.index) }
 131   .stab.indexstr 0      : { *(.stab.indexstr) }
 132   .comment 0            : { *(.comment) }
 133 }
 134 ASSERT(_edata_real == _edata, "error: zImage file size is incorrect");