arch/x86_64/kernel/vmlinux.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 #include <linux/config.h>
  10
  11 OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
  12 OUTPUT_ARCH(i386:x86-64)
  13 ENTRY(phys_startup_64)
  14 jiffies_64 = jiffies;
  15 SECTIONS
  16 {
  17   . = __START_KERNEL;
  18   phys_startup_64 = startup_64 - LOAD_OFFSET;
  19   _text = .;                    /* Text and read-only data */
  20   .text :  AT(ADDR(.text) - LOAD_OFFSET) {
  21         *(.text)
  22         SCHED_TEXT
  23         LOCK_TEXT
  24         *(.fixup)
  25         *(.gnu.warning)
  26         } = 0x9090
  27                                 /* out-of-line lock text */
  28   .text.lock : AT(ADDR(.text.lock) - LOAD_OFFSET) { *(.text.lock) }
  29
  30   _etext = .;                   /* End of text section */
  31
  32   . = ALIGN(16);                /* Exception table */
  33   __start___ex_table = .;
  34   __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { *(__ex_table) }
  35   __stop___ex_table = .;
  36
  37   RODATA
  38
  39                                 /* Data */
  40   .data : AT(ADDR(.data) - LOAD_OFFSET) {
  41         *(.data)
  42         CONSTRUCTORS
  43         }
  44
  45   _edata = .;                   /* End of data section */
  46
  47   __bss_start = .;              /* BSS */
  48   .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
  49         *(.bss.page_aligned)
  50         *(.bss)
  51         }
  52   __bss_end = .;
  53
  54   . = ALIGN(PAGE_SIZE);
  55   . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
  56   .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
  57         *(.data.cacheline_aligned)
  58   }
  59
  60 #define VSYSCALL_ADDR (-10*1024*1024)
  61 #define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.cacheline_aligned) + SIZEOF(.data.cacheline_aligned) + 4095) & ~(4095))
  62 #define VSYSCALL_VIRT_ADDR ((ADDR(.data.cacheline_aligned) + SIZEOF(.data.cacheline_aligned) + 4095) & ~(4095))
  63
  64 #define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR)
  65 #define VLOAD(x) (ADDR(x) - VLOAD_OFFSET)
  66
  67 #define VVIRT_OFFSET (VSYSCALL_ADDR - VSYSCALL_VIRT_ADDR)
  68 #define VVIRT(x) (ADDR(x) - VVIRT_OFFSET)
  69
  70   . = VSYSCALL_ADDR;
  71   .vsyscall_0 :  AT(VSYSCALL_PHYS_ADDR) { *(.vsyscall_0) }
  72   __vsyscall_0 = VSYSCALL_VIRT_ADDR;
  73
  74   . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
  75   .xtime_lock : AT(VLOAD(.xtime_lock)) { *(.xtime_lock) }
  76   xtime_lock = VVIRT(.xtime_lock);
  77
  78   .vxtime : AT(VLOAD(.vxtime)) { *(.vxtime) }
  79   vxtime = VVIRT(.vxtime);
  80
  81   .wall_jiffies : AT(VLOAD(.wall_jiffies)) { *(.wall_jiffies) }
  82   wall_jiffies = VVIRT(.wall_jiffies);
  83
  84   .sys_tz : AT(VLOAD(.sys_tz)) { *(.sys_tz) }
  85   sys_tz = VVIRT(.sys_tz);
  86
  87   .sysctl_vsyscall : AT(VLOAD(.sysctl_vsyscall)) { *(.sysctl_vsyscall) }
  88   sysctl_vsyscall = VVIRT(.sysctl_vsyscall);
  89
  90   .xtime : AT(VLOAD(.xtime)) { *(.xtime) }
  91   xtime = VVIRT(.xtime);
  92
  93   . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
  94   .jiffies : AT(VLOAD(.jiffies)) { *(.jiffies) }
  95   jiffies = VVIRT(.jiffies);
  96
  97   .vsyscall_1 ADDR(.vsyscall_0) + 1024: AT(VLOAD(.vsyscall_1)) { *(.vsyscall_1) }
  98   .vsyscall_2 ADDR(.vsyscall_0) + 2048: AT(VLOAD(.vsyscall_2)) { *(.vsyscall_2) }
  99   .vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3)) { *(.vsyscall_3) }
 100
 101   . = VSYSCALL_VIRT_ADDR + 4096;
 102
 103 #undef VSYSCALL_ADDR
 104 #undef VSYSCALL_PHYS_ADDR
 105 #undef VSYSCALL_VIRT_ADDR
 106 #undef VLOAD_OFFSET
 107 #undef VLOAD
 108 #undef VVIRT_OFFSET
 109 #undef VVIRT
 110
 111   . = ALIGN(8192);              /* init_task */
 112   .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
 113         *(.data.init_task)
 114   }
 115
 116   . = ALIGN(4096);
 117   .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
 118         *(.data.page_aligned)
 119   }
 120
 121   . = ALIGN(4096);              /* Init code and data */
 122   __init_begin = .;
 123   .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
 124         _sinittext = .;
 125         *(.init.text)
 126         _einittext = .;
 127   }
 128   __initdata_begin = .;
 129   .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { *(.init.data) }
 130   __initdata_end = .;
 131   . = ALIGN(16);
 132   __setup_start = .;
 133   .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { *(.init.setup) }
 134   __setup_end = .;
 135   __initcall_start = .;
 136   .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
 137         *(.initcall1.init)
 138         *(.initcall2.init)
 139         *(.initcall3.init)
 140         *(.initcall4.init)
 141         *(.initcall5.init)
 142         *(.initcall6.init)
 143         *(.initcall7.init)
 144   }
 145   __initcall_end = .;
 146   __con_initcall_start = .;
 147   .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
 148         *(.con_initcall.init)
 149   }
 150   __con_initcall_end = .;
 151   SECURITY_INIT
 152   . = ALIGN(8);
 153   __alt_instructions = .;
 154   .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) {
 155         *(.altinstructions)
 156   }
 157   __alt_instructions_end = .;
 158   .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) {
 159         *(.altinstr_replacement)
 160   }
 161   /* .exit.text is discard at runtime, not link time, to deal with references
 162      from .altinstructions and .eh_frame */
 163   .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) }
 164   .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { *(.exit.data) }
 165   . = ALIGN(4096);
 166   __initramfs_start = .;
 167   .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) }
 168   __initramfs_end = .;
 169   . = ALIGN(32);
 170   __per_cpu_start = .;
 171   .data.percpu  : AT(ADDR(.data.percpu) - LOAD_OFFSET) { *(.data.percpu) }
 172   __per_cpu_end = .;
 173   . = ALIGN(4096);
 174   __init_end = .;
 175
 176   . = ALIGN(4096);
 177   __nosave_begin = .;
 178   .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { *(.data.nosave) }
 179   . = ALIGN(4096);
 180   __nosave_end = .;
 181
 182   _end = . ;
 183
 184   /* Sections to be discarded */
 185   /DISCARD/ : {
 186         *(.exitcall.exit)
 187 #ifndef CONFIG_DEBUG_INFO
 188         *(.eh_frame)
 189 #endif
 190         }
 191
 192   /* DWARF 2 */
 193   .debug_info     0 : { *(.debug_info) }
 194   .debug_abbrev   0 : { *(.debug_abbrev) }
 195   .debug_line     0 : { *(.debug_line) }
 196   .debug_frame    0 : { *(.debug_frame) }
 197   .debug_str      0 : { *(.debug_str) }
 198   .debug_loc      0 : { *(.debug_loc) }
 199   .debug_macinfo  0 : { *(.debug_macinfo) }
 200   /* SGI/MIPS DWARF 2 extensions */
 201   .debug_weaknames 0 : { *(.debug_weaknames) }
 202   .debug_funcnames 0 : { *(.debug_funcnames) }
 203   .debug_typenames 0 : { *(.debug_typenames) }
 204   .debug_varnames  0 : { *(.debug_varnames) }
 205
 206
 207   .comment 0 : { *(.comment) }
 208 }