arch/x86/kernel/vmlinux_64.lds.S

   1 /* ld script to make x86-64 Linux kernel
   2  * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>;
   3  */
   4
   5 #define LOAD_OFFSET __START_KERNEL_map
   6
   7 #include <asm-generic/vmlinux.lds.h>
   8 #include <asm/page.h>
   9
  10 #undef i386     /* in case the preprocessor is a 32bit one */
  11
  12 OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
  13 OUTPUT_ARCH(i386:x86-64)
  14 ENTRY(phys_startup_64)
  15 jiffies_64 = jiffies;
  16 _proxy_pda = 1;
  17 PHDRS {
  18         text PT_LOAD FLAGS(5);  /* R_E */
  19         data PT_LOAD FLAGS(7);  /* RWE */
  20         user PT_LOAD FLAGS(7);  /* RWE */
  21         data.init PT_LOAD FLAGS(7);     /* RWE */
  22         note PT_NOTE FLAGS(4);  /* R__ */
  23 }
  24 SECTIONS
  25 {
  26   . = __START_KERNEL;
  27   phys_startup_64 = startup_64 - LOAD_OFFSET;
  28   _text = .;                    /* Text and read-only data */
  29   .text :  AT(ADDR(.text) - LOAD_OFFSET) {
  30         /* First the code that has to be first for bootstrapping */
  31         *(.text.head)
  32         _stext = .;
  33         /* Then the rest */
  34         TEXT_TEXT
  35         SCHED_TEXT
  36         LOCK_TEXT
  37         KPROBES_TEXT
  38         *(.fixup)
  39         *(.gnu.warning)
  40         _etext = .;             /* End of text section */
  41   } :text = 0x9090
  42
  43   . = ALIGN(16);                /* Exception table */
  44   __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
  45         __start___ex_table = .;
  46          *(__ex_table)
  47         __stop___ex_table = .;
  48   }
  49
  50   NOTES :text :note
  51
  52   BUG_TABLE :text
  53
  54   RODATA
  55
  56   . = ALIGN(4);
  57   .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {
  58         __tracedata_start = .;
  59         *(.tracedata)
  60         __tracedata_end = .;
  61   }
  62
  63   . = ALIGN(PAGE_SIZE);         /* Align data segment to page size boundary */
  64                                 /* Data */
  65   .data : AT(ADDR(.data) - LOAD_OFFSET) {
  66         DATA_DATA
  67         CONSTRUCTORS
  68         } :data
  69
  70   _edata = .;                   /* End of data section */
  71
  72   . = ALIGN(PAGE_SIZE);
  73   . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
  74   .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
  75         *(.data.cacheline_aligned)
  76   }
  77   . = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
  78   .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
  79         *(.data.read_mostly)
  80   }
  81
  82 #define VSYSCALL_ADDR (-10*1024*1024)
  83 #define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
  84 #define VSYSCALL_VIRT_ADDR ((ADDR(.data.read_mostly) + SIZEOF(.data.read_mostly) + 4095) & ~(4095))
  85
  86 #define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR)
  87 #define VLOAD(x) (ADDR(x) - VLOAD_OFFSET)
  88
  89 #define VVIRT_OFFSET (VSYSCALL_ADDR - VSYSCALL_VIRT_ADDR)
  90 #define VVIRT(x) (ADDR(x) - VVIRT_OFFSET)
  91
  92   . = VSYSCALL_ADDR;
  93   .vsyscall_0 :  AT(VSYSCALL_PHYS_ADDR) { *(.vsyscall_0) } :user
  94   __vsyscall_0 = VSYSCALL_VIRT_ADDR;
  95
  96   . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
  97   .vsyscall_fn : AT(VLOAD(.vsyscall_fn)) { *(.vsyscall_fn) }
  98   . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
  99   .vsyscall_gtod_data : AT(VLOAD(.vsyscall_gtod_data))
 100                 { *(.vsyscall_gtod_data) }
 101   vsyscall_gtod_data = VVIRT(.vsyscall_gtod_data);
 102   .vsyscall_clock : AT(VLOAD(.vsyscall_clock))
 103                 { *(.vsyscall_clock) }
 104   vsyscall_clock = VVIRT(.vsyscall_clock);
 105
 106
 107   .vsyscall_1 ADDR(.vsyscall_0) + 1024: AT(VLOAD(.vsyscall_1))
 108                 { *(.vsyscall_1) }
 109   .vsyscall_2 ADDR(.vsyscall_0) + 2048: AT(VLOAD(.vsyscall_2))
 110                 { *(.vsyscall_2) }
 111
 112   .vgetcpu_mode : AT(VLOAD(.vgetcpu_mode)) { *(.vgetcpu_mode) }
 113   vgetcpu_mode = VVIRT(.vgetcpu_mode);
 114
 115   . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
 116   .jiffies : AT(VLOAD(.jiffies)) { *(.jiffies) }
 117   jiffies = VVIRT(.jiffies);
 118
 119   .vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3))
 120                 { *(.vsyscall_3) }
 121
 122   . = VSYSCALL_VIRT_ADDR + PAGE_SIZE;
 123
 124 #undef VSYSCALL_ADDR
 125 #undef VSYSCALL_PHYS_ADDR
 126 #undef VSYSCALL_VIRT_ADDR
 127 #undef VLOAD_OFFSET
 128 #undef VLOAD
 129 #undef VVIRT_OFFSET
 130 #undef VVIRT
 131
 132   . = ALIGN(THREAD_SIZE);       /* init_task */
 133   .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
 134         *(.data.init_task)
 135   }:data.init
 136
 137   . = ALIGN(PAGE_SIZE);
 138   .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
 139         *(.data.page_aligned)
 140   }
 141
 142   /* might get freed after init */
 143   . = ALIGN(PAGE_SIZE);
 144   __smp_alt_begin = .;
 145   __smp_locks = .;
 146   .smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
 147         *(.smp_locks)
 148   }
 149   __smp_locks_end = .;
 150   . = ALIGN(PAGE_SIZE);
 151   __smp_alt_end = .;
 152
 153   . = ALIGN(PAGE_SIZE);         /* Init code and data */
 154   __init_begin = .;
 155   .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
 156         _sinittext = .;
 157         INIT_TEXT
 158         _einittext = .;
 159   }
 160   .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
 161         __initdata_begin = .;
 162         INIT_DATA
 163         __initdata_end = .;
 164    }
 165
 166   . = ALIGN(16);
 167   __setup_start = .;
 168   .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { *(.init.setup) }
 169   __setup_end = .;
 170   __initcall_start = .;
 171   .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
 172         INITCALLS
 173   }
 174   __initcall_end = .;
 175   __con_initcall_start = .;
 176   .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
 177         *(.con_initcall.init)
 178   }
 179   __con_initcall_end = .;
 180   SECURITY_INIT
 181
 182   . = ALIGN(8);
 183   .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
 184   __parainstructions = .;
 185        *(.parainstructions)
 186   __parainstructions_end = .;
 187   }
 188
 189   . = ALIGN(8);
 190   __alt_instructions = .;
 191   .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
 192         *(.altinstructions)
 193   }
 194   __alt_instructions_end = .;
 195   .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
 196         *(.altinstr_replacement)
 197   }
 198   /* .exit.text is discard at runtime, not link time, to deal with references
 199      from .altinstructions and .eh_frame */
 200   .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
 201         EXIT_TEXT
 202   }
 203   .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
 204         EXIT_DATA
 205   }
 206
 207 /* vdso blob that is mapped into user space */
 208   vdso_start = . ;
 209   .vdso  : AT(ADDR(.vdso) - LOAD_OFFSET) { *(.vdso) }
 210   . = ALIGN(PAGE_SIZE);
 211   vdso_end = .;
 212
 213 #ifdef CONFIG_BLK_DEV_INITRD
 214   . = ALIGN(PAGE_SIZE);
 215   __initramfs_start = .;
 216   .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) }
 217   __initramfs_end = .;
 218 #endif
 219
 220   PERCPU(PAGE_SIZE)
 221
 222   . = ALIGN(PAGE_SIZE);
 223   __init_end = .;
 224
 225   . = ALIGN(PAGE_SIZE);
 226   __nosave_begin = .;
 227   .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { *(.data.nosave) }
 228   . = ALIGN(PAGE_SIZE);
 229   __nosave_end = .;
 230
 231   __bss_start = .;              /* BSS */
 232   .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
 233         *(.bss.page_aligned)
 234         *(.bss)
 235         }
 236   __bss_stop = .;
 237
 238   _end = . ;
 239
 240   /* Sections to be discarded */
 241   /DISCARD/ : {
 242         *(.exitcall.exit)
 243         *(.eh_frame)
 244         }
 245
 246   STABS_DEBUG
 247
 248   DWARF_DEBUG
 249 }