arch/mips/kernel/vmlinux.lds.S

   1 #include <asm/asm-offsets.h>
   2 #include <asm/thread_info.h>
   3
   4 #define PAGE_SIZE _PAGE_SIZE
   5
   6 /*
   7  * Put .bss..swapper_pg_dir as the first thing in .bss. This will
   8  * ensure that it has .bss alignment (64K).
   9  */
  10 #define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir)
  11
  12 #include <asm-generic/vmlinux.lds.h>
  13
  14 #undef mips
  15 #define mips mips
  16 OUTPUT_ARCH(mips)
  17 ENTRY(kernel_entry)
  18 PHDRS {
  19         text PT_LOAD FLAGS(7);  /* RWX */
  20         note PT_NOTE FLAGS(4);  /* R__ */
  21 }
  22
  23 #ifdef CONFIG_32BIT
  24         #ifdef CONFIG_CPU_LITTLE_ENDIAN
  25                 jiffies  = jiffies_64;
  26         #else
  27                 jiffies  = jiffies_64 + 4;
  28         #endif
  29 #else
  30         jiffies  = jiffies_64;
  31 #endif
  32
  33 SECTIONS
  34 {
  35 #ifdef CONFIG_BOOT_ELF64
  36         /* Read-only sections, merged into text segment: */
  37         /* . = 0xc000000000000000; */
  38
  39         /* This is the value for an Origin kernel, taken from an IRIX kernel.  */
  40         /* . = 0xc00000000001c000; */
  41
  42         /* Set the vaddr for the text segment to a value
  43          *   >= 0xa800 0000 0001 9000 if no symmon is going to configured
  44          *   >= 0xa800 0000 0030 0000 otherwise
  45          */
  46
  47         /* . = 0xa800000000300000; */
  48         . = 0xffffffff80300000;
  49 #endif
  50         . = VMLINUX_LOAD_ADDRESS;
  51         /* read-only */
  52         _text = .;      /* Text and read-only data */
  53         .text : {
  54                 TEXT_TEXT
  55                 SCHED_TEXT
  56                 LOCK_TEXT
  57                 KPROBES_TEXT
  58                 IRQENTRY_TEXT
  59                 *(.text.*)
  60                 *(.fixup)
  61                 *(.gnu.warning)
  62         } :text = 0
  63         _etext = .;     /* End of text section */
  64
  65         EXCEPTION_TABLE(16)
  66
  67         /* Exception table for data bus errors */
  68         __dbe_table : {
  69                 __start___dbe_table = .;
  70                 *(__dbe_table)
  71                 __stop___dbe_table = .;
  72         }
  73
  74         NOTES :text :note
  75         .dummy : { *(.dummy) } :text
  76
  77         _sdata = .;                     /* Start of data section */
  78         RODATA
  79
  80         /* writeable */
  81         .data : {       /* Data */
  82                 . = . + DATAOFFSET;             /* for CONFIG_MAPPED_KERNEL */
  83
  84                 INIT_TASK_DATA(THREAD_SIZE)
  85                 NOSAVE_DATA
  86                 CACHELINE_ALIGNED_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
  87                 READ_MOSTLY_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
  88                 DATA_DATA
  89                 CONSTRUCTORS
  90         }
  91         _gp = . + 0x8000;
  92         .lit8 : {
  93                 *(.lit8)
  94         }
  95         .lit4 : {
  96                 *(.lit4)
  97         }
  98         /* We want the small data sections together, so single-instruction offsets
  99            can access them all, and initialized data all before uninitialized, so
 100            we can shorten the on-disk segment size.  */
 101         .sdata : {
 102                 *(.sdata)
 103         }
 104         _edata =  .;                    /* End of data section */
 105
 106         /* will be freed after init */
 107         . = ALIGN(PAGE_SIZE);           /* Init code and data */
 108         __init_begin = .;
 109         INIT_TEXT_SECTION(PAGE_SIZE)
 110         INIT_DATA_SECTION(16)
 111
 112         . = ALIGN(4);
 113         .mips.machines.init : AT(ADDR(.mips.machines.init) - LOAD_OFFSET) {
 114                 __mips_machines_start = .;
 115                 *(.mips.machines.init)
 116                 __mips_machines_end = .;
 117         }
 118
 119         /* .exit.text is discarded at runtime, not link time, to deal with
 120          * references from .rodata
 121          */
 122         .exit.text : {
 123                 EXIT_TEXT
 124         }
 125         .exit.data : {
 126                 EXIT_DATA
 127         }
 128
 129         PERCPU_SECTION(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
 130         /*
 131          * Align to 64K in attempt to eliminate holes before the
 132          * .bss..swapper_pg_dir section at the start of .bss.  This
 133          * also satisfies PAGE_SIZE alignment as the largest page size
 134          * allowed is 64K.
 135          */
 136         . = ALIGN(0x10000);
 137         __init_end = .;
 138         /* freed after init ends here */
 139
 140         /*
 141          * Force .bss to 64K alignment so that .bss..swapper_pg_dir
 142          * gets that alignment.  .sbss should be empty, so there will be
 143          * no holes after __init_end. */
 144         BSS_SECTION(0, 0x10000, 0)
 145
 146         _end = . ;
 147
 148         /* These mark the ABI of the kernel for debuggers.  */
 149         .mdebug.abi32 : {
 150                 KEEP(*(.mdebug.abi32))
 151         }
 152         .mdebug.abi64 : {
 153                 KEEP(*(.mdebug.abi64))
 154         }
 155
 156         /* This is the MIPS specific mdebug section.  */
 157         .mdebug : {
 158                 *(.mdebug)
 159         }
 160
 161         STABS_DEBUG
 162         DWARF_DEBUG
 163
 164         /* These must appear regardless of  .  */
 165         .gptab.sdata : {
 166                 *(.gptab.data)
 167                 *(.gptab.sdata)
 168         }
 169         .gptab.sbss : {
 170                 *(.gptab.bss)
 171                 *(.gptab.sbss)
 172         }
 173
 174         /* Sections to be discarded */
 175         DISCARDS
 176         /DISCARD/ : {
 177                 /* ABI crap starts here */
 178                 *(.MIPS.options)
 179                 *(.options)
 180                 *(.pdr)
 181                 *(.reginfo)
 182         }
 183 }