linux/arch/powerpc/kernel/vmlinux.lds.S
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   1#ifdef CONFIG_PPC64
   2#define PROVIDE32(x)    PROVIDE(__unused__##x)
   3#else
   4#define PROVIDE32(x)    PROVIDE(x)
   5#endif
   6#include <asm/page.h>
   7#include <asm-generic/vmlinux.lds.h>
   8#include <asm/cache.h>
   9#include <asm/thread_info.h>
  10
  11ENTRY(_stext)
  12
  13PHDRS {
  14        kernel PT_LOAD FLAGS(7); /* RWX */
  15        notes PT_NOTE FLAGS(0);
  16        dummy PT_NOTE FLAGS(0);
  17
  18        /* binutils < 2.18 has a bug that makes it misbehave when taking an
  19           ELF file with all segments at load address 0 as input.  This
  20           happens when running "strip" on vmlinux, because of the AT() magic
  21           in this linker script.  People using GCC >= 4.2 won't run into
  22           this problem, because the "build-id" support will put some data
  23           into the "notes" segment (at a non-zero load address).
  24
  25           To work around this, we force some data into both the "dummy"
  26           segment and the kernel segment, so the dummy segment will get a
  27           non-zero load address.  It's not enough to always create the
  28           "notes" segment, since if nothing gets assigned to it, its load
  29           address will be zero.  */
  30}
  31
  32#ifdef CONFIG_PPC64
  33OUTPUT_ARCH(powerpc:common64)
  34jiffies = jiffies_64;
  35#else
  36OUTPUT_ARCH(powerpc:common)
  37jiffies = jiffies_64 + 4;
  38#endif
  39SECTIONS
  40{
  41        . = 0;
  42        reloc_start = .;
  43
  44        . = KERNELBASE;
  45
  46/*
  47 * Text, read only data and other permanent read-only sections
  48 */
  49
  50        /* Text and gots */
  51        .text : AT(ADDR(.text) - LOAD_OFFSET) {
  52                ALIGN_FUNCTION();
  53                HEAD_TEXT
  54                _text = .;
  55                /* careful! __ftr_alt_* sections need to be close to .text */
  56                *(.text .fixup __ftr_alt_* .ref.text)
  57                SCHED_TEXT
  58                LOCK_TEXT
  59                KPROBES_TEXT
  60                IRQENTRY_TEXT
  61
  62#ifdef CONFIG_PPC32
  63                *(.got1)
  64                __got2_start = .;
  65                *(.got2)
  66                __got2_end = .;
  67#endif /* CONFIG_PPC32 */
  68
  69        } :kernel
  70
  71        . = ALIGN(PAGE_SIZE);
  72        _etext = .;
  73        PROVIDE32 (etext = .);
  74
  75        /* Read-only data */
  76        RODATA
  77
  78        EXCEPTION_TABLE(0)
  79
  80        NOTES :kernel :notes
  81
  82        /* The dummy segment contents for the bug workaround mentioned above
  83           near PHDRS.  */
  84        .dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
  85                LONG(0)
  86                LONG(0)
  87                LONG(0)
  88        } :kernel :dummy
  89
  90/*
  91 * Init sections discarded at runtime
  92 */
  93        . = ALIGN(PAGE_SIZE);
  94        __init_begin = .;
  95        INIT_TEXT_SECTION(PAGE_SIZE) :kernel
  96
  97        /* .exit.text is discarded at runtime, not link time,
  98         * to deal with references from __bug_table
  99         */
 100        .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
 101                EXIT_TEXT
 102        }
 103
 104        .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
 105                INIT_DATA
 106                __vtop_table_begin = .;
 107                *(.vtop_fixup);
 108                __vtop_table_end = .;
 109                __ptov_table_begin = .;
 110                *(.ptov_fixup);
 111                __ptov_table_end = .;
 112        }
 113
 114        .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
 115                INIT_SETUP(16)
 116        }
 117
 118        .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
 119                INIT_CALLS
 120        }
 121
 122        .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
 123                CON_INITCALL
 124        }
 125
 126        SECURITY_INIT
 127
 128        . = ALIGN(8);
 129        __ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
 130                __start___ftr_fixup = .;
 131                *(__ftr_fixup)
 132                __stop___ftr_fixup = .;
 133        }
 134        . = ALIGN(8);
 135        __mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
 136                __start___mmu_ftr_fixup = .;
 137                *(__mmu_ftr_fixup)
 138                __stop___mmu_ftr_fixup = .;
 139        }
 140        . = ALIGN(8);
 141        __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
 142                __start___lwsync_fixup = .;
 143                *(__lwsync_fixup)
 144                __stop___lwsync_fixup = .;
 145        }
 146#ifdef CONFIG_PPC64
 147        . = ALIGN(8);
 148        __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
 149                __start___fw_ftr_fixup = .;
 150                *(__fw_ftr_fixup)
 151                __stop___fw_ftr_fixup = .;
 152        }
 153#endif
 154        .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
 155                INIT_RAM_FS
 156        }
 157
 158        PERCPU_SECTION(L1_CACHE_BYTES)
 159
 160        . = ALIGN(8);
 161        .machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
 162                __machine_desc_start = . ;
 163                *(.machine.desc)
 164                __machine_desc_end = . ;
 165        }
 166#ifdef CONFIG_RELOCATABLE
 167        . = ALIGN(8);
 168        .dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
 169        {
 170#ifdef CONFIG_RELOCATABLE_PPC32
 171                __dynamic_symtab = .;
 172#endif
 173                *(.dynsym)
 174        }
 175        .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
 176        .dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
 177        {
 178                __dynamic_start = .;
 179                *(.dynamic)
 180        }
 181        .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
 182        .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
 183        .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
 184        {
 185                __rela_dyn_start = .;
 186                *(.rela*)
 187        }
 188#endif
 189
 190        /* freed after init ends here */
 191        . = ALIGN(PAGE_SIZE);
 192        __init_end = .;
 193
 194/*
 195 * And now the various read/write data
 196 */
 197
 198        . = ALIGN(PAGE_SIZE);
 199        _sdata = .;
 200
 201#ifdef CONFIG_PPC32
 202        .data : AT(ADDR(.data) - LOAD_OFFSET) {
 203                DATA_DATA
 204                *(.sdata)
 205                *(.got.plt) *(.got)
 206        }
 207#else
 208        .data : AT(ADDR(.data) - LOAD_OFFSET) {
 209                DATA_DATA
 210                *(.data.rel*)
 211                *(.toc1)
 212                *(.branch_lt)
 213        }
 214
 215        .opd : AT(ADDR(.opd) - LOAD_OFFSET) {
 216                *(.opd)
 217        }
 218
 219        .got : AT(ADDR(.got) - LOAD_OFFSET) {
 220                __toc_start = .;
 221                *(.got)
 222                *(.toc)
 223        }
 224#endif
 225
 226        /* The initial task and kernel stack */
 227        INIT_TASK_DATA_SECTION(THREAD_SIZE)
 228
 229        .data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
 230                PAGE_ALIGNED_DATA(PAGE_SIZE)
 231        }
 232
 233        .data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
 234                CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
 235        }
 236
 237        .data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
 238                READ_MOSTLY_DATA(L1_CACHE_BYTES)
 239        }
 240
 241        . = ALIGN(PAGE_SIZE);
 242        .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
 243                NOSAVE_DATA
 244        }
 245
 246        . = ALIGN(PAGE_SIZE);
 247        _edata  =  .;
 248        PROVIDE32 (edata = .);
 249
 250/*
 251 * And finally the bss
 252 */
 253
 254        BSS_SECTION(0, 0, 0)
 255
 256        . = ALIGN(PAGE_SIZE);
 257        _end = . ;
 258        PROVIDE32 (end = .);
 259
 260        /* Sections to be discarded. */
 261        DISCARDS
 262}
 263