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 #define ARM_EXIT_KEEP(x)
  13 #define ARM_EXIT_DISCARD(x)     x
  14
  15 OUTPUT_ARCH(aarch64)
  16 ENTRY(stext)
  17
  18 jiffies = jiffies_64;
  19
  20 #define HYPERVISOR_TEXT                                 \
  21         /*                                              \
  22          * Force the alignment to be compatible with    \
  23          * the vectors requirements                     \
  24          */                                             \
  25         . = ALIGN(2048);                                \
  26         VMLINUX_SYMBOL(__hyp_idmap_text_start) = .;     \
  27         *(.hyp.idmap.text)                              \
  28         VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;       \
  29         VMLINUX_SYMBOL(__hyp_text_start) = .;           \
  30         *(.hyp.text)                                    \
  31         VMLINUX_SYMBOL(__hyp_text_end) = .;
  32
  33 SECTIONS
  34 {
  35         /*
  36          * XXX: The linker does not define how output sections are
  37          * assigned to input sections when there are multiple statements
  38          * matching the same input section name.  There is no documented
  39          * order of matching.
  40          */
  41         /DISCARD/ : {
  42                 ARM_EXIT_DISCARD(EXIT_TEXT)
  43                 ARM_EXIT_DISCARD(EXIT_DATA)
  44                 EXIT_CALL
  45                 *(.discard)
  46                 *(.discard.*)
  47         }
  48
  49         . = PAGE_OFFSET + TEXT_OFFSET;
  50
  51         .head.text : {
  52                 _text = .;
  53                 HEAD_TEXT
  54         }
  55         .text : {                       /* Real text segment            */
  56                 _stext = .;             /* Text and read-only data      */
  57                         *(.smp.pen.text)
  58                         __exception_text_start = .;
  59                         *(.exception.text)
  60                         __exception_text_end = .;
  61                         IRQENTRY_TEXT
  62                         TEXT_TEXT
  63                         SCHED_TEXT
  64                         LOCK_TEXT
  65                         HYPERVISOR_TEXT
  66                         *(.fixup)
  67                         *(.gnu.warning)
  68                 . = ALIGN(16);
  69                 *(.got)                 /* Global offset table          */
  70         }
  71
  72         RO_DATA(PAGE_SIZE)
  73         EXCEPTION_TABLE(8)
  74         NOTES
  75         _etext = .;                     /* End of text and rodata section */
  76
  77         . = ALIGN(PAGE_SIZE);
  78         __init_begin = .;
  79
  80         INIT_TEXT_SECTION(8)
  81         .exit.text : {
  82                 ARM_EXIT_KEEP(EXIT_TEXT)
  83         }
  84         . = ALIGN(16);
  85         .init.data : {
  86                 INIT_DATA
  87                 INIT_SETUP(16)
  88                 INIT_CALLS
  89                 CON_INITCALL
  90                 SECURITY_INITCALL
  91                 INIT_RAM_FS
  92         }
  93         .exit.data : {
  94                 ARM_EXIT_KEEP(EXIT_DATA)
  95         }
  96
  97         PERCPU_SECTION(64)
  98
  99         __init_end = .;
 100         . = ALIGN(THREAD_SIZE);
 101         __data_loc = .;
 102
 103         .data : AT(__data_loc) {
 104                 _data = .;              /* address in memory */
 105                 _sdata = .;
 106
 107                 /*
 108                  * first, the init task union, aligned
 109                  * to an 8192 byte boundary.
 110                  */
 111                 INIT_TASK_DATA(THREAD_SIZE)
 112                 NOSAVE_DATA
 113                 CACHELINE_ALIGNED_DATA(64)
 114                 READ_MOSTLY_DATA(64)
 115
 116                 /*
 117                  * and the usual data section
 118                  */
 119                 DATA_DATA
 120                 CONSTRUCTORS
 121
 122                 _edata = .;
 123         }
 124         _edata_loc = __data_loc + SIZEOF(.data);
 125
 126         BSS_SECTION(0, 0, 0)
 127         _end = .;
 128
 129         STABS_DEBUG
 130         .comment 0 : { *(.comment) }
 131 }
 132
 133 /*
 134  * The HYP init code can't be more than a page long.
 135  */
 136 ASSERT(((__hyp_idmap_text_start + PAGE_SIZE) > __hyp_idmap_text_end),
 137        "HYP init code too big")