arch/arm64/kernel/vmlinux.lds.S

   1 /*
   2  * ld script to make ARM Linux kernel
   3  * taken from the i386 version by Russell King
   4  * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
   5  */
   6
   7 #include <asm-generic/vmlinux.lds.h>
   8 #include <asm/thread_info.h>
   9 #include <asm/memory.h>
  10 #include <asm/page.h>
  11
  12 #include "image.h"
  13
  14 #define ARM_EXIT_KEEP(x)
  15 #define ARM_EXIT_DISCARD(x)     x
  16
  17 OUTPUT_ARCH(aarch64)
  18 ENTRY(_text)
  19
  20 jiffies = jiffies_64;
  21
  22 #define HYPERVISOR_TEXT                                 \
  23         /*                                              \
  24          * Force the alignment to be compatible with    \
  25          * the vectors requirements                     \
  26          */                                             \
  27         . = ALIGN(2048);                                \
  28         VMLINUX_SYMBOL(__hyp_idmap_text_start) = .;     \
  29         *(.hyp.idmap.text)                              \
  30         VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;       \
  31         VMLINUX_SYMBOL(__hyp_text_start) = .;           \
  32         *(.hyp.text)                                    \
  33         VMLINUX_SYMBOL(__hyp_text_end) = .;
  34
  35 SECTIONS
  36 {
  37         /*
  38          * XXX: The linker does not define how output sections are
  39          * assigned to input sections when there are multiple statements
  40          * matching the same input section name.  There is no documented
  41          * order of matching.
  42          */
  43         /DISCARD/ : {
  44                 ARM_EXIT_DISCARD(EXIT_TEXT)
  45                 ARM_EXIT_DISCARD(EXIT_DATA)
  46                 EXIT_CALL
  47                 *(.discard)
  48                 *(.discard.*)
  49         }
  50
  51         . = PAGE_OFFSET + TEXT_OFFSET;
  52
  53         .head.text : {
  54                 _text = .;
  55                 HEAD_TEXT
  56         }
  57         .text : {                       /* Real text segment            */
  58                 _stext = .;             /* Text and read-only data      */
  59                         __exception_text_start = .;
  60                         *(.exception.text)
  61                         __exception_text_end = .;
  62                         IRQENTRY_TEXT
  63                         TEXT_TEXT
  64                         SCHED_TEXT
  65                         LOCK_TEXT
  66                         HYPERVISOR_TEXT
  67                         *(.fixup)
  68                         *(.gnu.warning)
  69                 . = ALIGN(16);
  70                 *(.got)                 /* Global offset table          */
  71         }
  72
  73         RO_DATA(PAGE_SIZE)
  74         EXCEPTION_TABLE(8)
  75         NOTES
  76         _etext = .;                     /* End of text and rodata section */
  77
  78         . = ALIGN(PAGE_SIZE);
  79         __init_begin = .;
  80
  81         INIT_TEXT_SECTION(8)
  82         .exit.text : {
  83                 ARM_EXIT_KEEP(EXIT_TEXT)
  84         }
  85         . = ALIGN(16);
  86         .init.data : {
  87                 INIT_DATA
  88                 INIT_SETUP(16)
  89                 INIT_CALLS
  90                 CON_INITCALL
  91                 SECURITY_INITCALL
  92                 INIT_RAM_FS
  93         }
  94         .exit.data : {
  95                 ARM_EXIT_KEEP(EXIT_DATA)
  96         }
  97
  98         PERCPU_SECTION(64)
  99
 100         . = ALIGN(PAGE_SIZE);
 101         __init_end = .;
 102
 103         _data = .;
 104         _sdata = .;
 105         RW_DATA_SECTION(64, PAGE_SIZE, THREAD_SIZE)
 106         _edata = .;
 107
 108         BSS_SECTION(0, 0, 0)
 109
 110         . = ALIGN(PAGE_SIZE);
 111         idmap_pg_dir = .;
 112         . += IDMAP_DIR_SIZE;
 113         swapper_pg_dir = .;
 114         . += SWAPPER_DIR_SIZE;
 115
 116         _end = .;
 117
 118         STABS_DEBUG
 119
 120         HEAD_SYMBOLS
 121 }
 122
 123 /*
 124  * The HYP init code can't be more than a page long.
 125  */
 126 ASSERT(((__hyp_idmap_text_start + PAGE_SIZE) > __hyp_idmap_text_end),
 127        "HYP init code too big")
 128
 129 /*
 130  * If padding is applied before .head.text, virt<->phys conversions will fail.
 131  */
 132 ASSERT(_text == (PAGE_OFFSET + TEXT_OFFSET), "HEAD is misaligned")