Home | History | Annotate | Download | only in ldscripts
      1 /* Script for -z combreloc -z now -z relro: combine and sort reloc sections */
      2 /* Copyright (C) 2014 Free Software Foundation, Inc.
      3    Copying and distribution of this script, with or without modification,
      4    are permitted in any medium without royalty provided the copyright
      5    notice and this notice are preserved.  */
      6 OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64",
      7 	      "elf64-x86-64")
      8 OUTPUT_ARCH(i386:x86-64)
      9 ENTRY(_start)
     10 SECTIONS
     11 {
     12   /* Read-only sections, merged into text segment: */
     13   PROVIDE (__executable_start = 0x400000); . = 0x400000 + SIZEOF_HEADERS;
     14   .interp         : { *(.interp) }
     15   .note.gnu.build-id : { *(.note.gnu.build-id) }
     16   .hash           : { *(.hash) }
     17   .gnu.hash       : { *(.gnu.hash) }
     18   .dynsym         : { *(.dynsym) }
     19   .dynstr         : { *(.dynstr) }
     20   .gnu.version    : { *(.gnu.version) }
     21   .gnu.version_d  : { *(.gnu.version_d) }
     22   .gnu.version_r  : { *(.gnu.version_r) }
     23   .rela.dyn       :
     24     {
     25       *(.rela.init)
     26       *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*)
     27       *(.rela.fini)
     28       *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*)
     29       *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*)
     30       *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*)
     31       *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*)
     32       *(.rela.ctors)
     33       *(.rela.dtors)
     34       *(.rela.got)
     35       *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*)
     36       *(.rela.ldata .rela.ldata.* .rela.gnu.linkonce.l.*)
     37       *(.rela.lbss .rela.lbss.* .rela.gnu.linkonce.lb.*)
     38       *(.rela.lrodata .rela.lrodata.* .rela.gnu.linkonce.lr.*)
     39       *(.rela.ifunc)
     40     }
     41   .rela.plt       :
     42     {
     43       *(.rela.plt)
     44       PROVIDE_HIDDEN (__rela_iplt_start = .);
     45       *(.rela.iplt)
     46       PROVIDE_HIDDEN (__rela_iplt_end = .);
     47     }
     48   .init           :
     49   {
     50     KEEP (*(SORT_NONE(.init)))
     51   }
     52   .plt            : { *(.plt) *(.iplt) }
     53   .plt.bnd        : { *(.plt.bnd) }
     54   .text           :
     55   {
     56     *(.text.unlikely .text.*_unlikely .text.unlikely.*)
     57     *(.text.exit .text.exit.*)
     58     *(.text.startup .text.startup.*)
     59     *(.text.hot .text.hot.*)
     60     *(.text .stub .text.* .gnu.linkonce.t.*)
     61     /* .gnu.warning sections are handled specially by elf32.em.  */
     62     *(.gnu.warning)
     63   }
     64   .fini           :
     65   {
     66     KEEP (*(SORT_NONE(.fini)))
     67   }
     68   PROVIDE (__etext = .);
     69   PROVIDE (_etext = .);
     70   PROVIDE (etext = .);
     71   .rodata         : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
     72   .rodata1        : { *(.rodata1) }
     73   .eh_frame_hdr : { *(.eh_frame_hdr) }
     74   .eh_frame       : ONLY_IF_RO { KEEP (*(.eh_frame)) }
     75   .gcc_except_table   : ONLY_IF_RO { *(.gcc_except_table
     76   .gcc_except_table.*) }
     77   /* These sections are generated by the Sun/Oracle C++ compiler.  */
     78   .exception_ranges   : ONLY_IF_RO { *(.exception_ranges
     79   .exception_ranges*) }
     80   /* Adjust the address for the data segment.  For 32 bits we want to align
     81   at exactly a page boundary to make life easier for apriori. */
     82   . = ALIGN (CONSTANT (MAXPAGESIZE)) - ((CONSTANT (MAXPAGESIZE) - .) & (CONSTANT (MAXPAGESIZE) - 1)); . = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE));
     83   /* Exception handling  */
     84   .eh_frame       : ONLY_IF_RW { KEEP (*(.eh_frame)) }
     85   .gcc_except_table   : ONLY_IF_RW { *(.gcc_except_table .gcc_except_table.*) }
     86   .exception_ranges   : ONLY_IF_RW { *(.exception_ranges .exception_ranges*) }
     87   /* Thread Local Storage sections  */
     88   .tdata	  : { *(.tdata .tdata.* .gnu.linkonce.td.*) }
     89   .tbss		  : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
     90   /* Ensure the __preinit_array_start label is properly aligned.  We
     91      could instead move the label definition inside the section, but
     92      the linker would then create the section even if it turns out to
     93      be empty, which isn't pretty.  */
     94   . = ALIGN(64 / 8);
     95   PROVIDE_HIDDEN (__preinit_array_start = .);
     96   .preinit_array     :
     97   {
     98     KEEP (*(.preinit_array))
     99   }
    100   PROVIDE_HIDDEN (__preinit_array_end = .);
    101   PROVIDE_HIDDEN (__init_array_start = .);
    102   .init_array     :
    103   {
    104     KEEP (*crtbegin*.o(.init_array))
    105     KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
    106     KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin*.o *crtend.o *crtend*.o ) .ctors))
    107   }
    108   PROVIDE_HIDDEN (__init_array_end = .);
    109   PROVIDE_HIDDEN (__fini_array_start = .);
    110   .fini_array     :
    111   {
    112     KEEP (*crtbegin*.o(.fini_array))
    113     KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
    114     KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin*.o *crtend.o *crtend*.o ) .dtors))
    115   }
    116   PROVIDE_HIDDEN (__fini_array_end = .);
    117   .ctors          :
    118   {
    119     /* gcc uses crtbegin.o to find the start of
    120        the constructors, so we make sure it is
    121        first.  Because this is a wildcard, it
    122        doesn't matter if the user does not
    123        actually link against crtbegin.o; the
    124        linker won't look for a file to match a
    125        wildcard.  The wildcard also means that it
    126        doesn't matter which directory crtbegin.o
    127        is in.  */
    128     KEEP (*crtbegin.o(.ctors))
    129     KEEP (*crtbegin*.o(.ctors))
    130     /* We don't want to include the .ctor section from
    131        the crtend.o file until after the sorted ctors.
    132        The .ctor section from the crtend file contains the
    133        end of ctors marker and it must be last */
    134     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend*.o ) .ctors))
    135     KEEP (*(SORT(.ctors.*)))
    136     KEEP (*(.ctors))
    137   }
    138   .dtors          :
    139   {
    140     KEEP (*crtbegin.o(.dtors))
    141     KEEP (*crtbegin*.o(.dtors))
    142     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend*.o ) .dtors))
    143     KEEP (*(SORT(.dtors.*)))
    144     KEEP (*(.dtors))
    145   }
    146   .jcr            : { KEEP (*(.jcr)) }
    147   .data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro .data.rel.ro.* .gnu.linkonce.d.rel.ro.*) }
    148   .dynamic        : { *(.dynamic) }
    149   .got            : { *(.got.plt) *(.igot.plt) *(.got) *(.igot) }
    150   . = DATA_SEGMENT_RELRO_END (0, .);
    151   .data           :
    152   {
    153     *(.data .data.* .gnu.linkonce.d.*)
    154     SORT(CONSTRUCTORS)
    155   }
    156   .data1          : { *(.data1) }
    157   _edata = .; PROVIDE (edata = .);
    158   __bss_start = .;
    159   .bss            :
    160   {
    161    *(.dynbss)
    162    *(.bss .bss.* .gnu.linkonce.b.*)
    163    *(COMMON)
    164    /* Align here to ensure that the .bss section occupies space up to
    165       _end.  Align after .bss to ensure correct alignment even if the
    166       .bss section disappears because there are no input sections.  */
    167    . = ALIGN(64 / 8);
    168   }
    169   .lbss   :
    170   {
    171     *(.dynlbss)
    172     *(.lbss .lbss.* .gnu.linkonce.lb.*)
    173     *(LARGE_COMMON)
    174   }
    175   . = ALIGN(64 / 8);
    176   . = SEGMENT_START("ldata-segment", .);
    177   .lrodata   ALIGN(CONSTANT (MAXPAGESIZE)) + (. & (CONSTANT (MAXPAGESIZE) - 1)) :
    178   {
    179     *(.lrodata .lrodata.* .gnu.linkonce.lr.*)
    180   }
    181   .ldata   ALIGN(CONSTANT (MAXPAGESIZE)) + (. & (CONSTANT (MAXPAGESIZE) - 1)) :
    182   {
    183     *(.ldata .ldata.* .gnu.linkonce.l.*)
    184     . = ALIGN(. != 0 ? 64 / 8 : 1);
    185   }
    186   . = ALIGN(64 / 8);
    187   _end = .;
    188   _bss_end__ = . ; __bss_end__ = . ; __end__ = . ;
    189   PROVIDE (end = .);
    190   . = DATA_SEGMENT_END (.);
    191   /* Stabs debugging sections.  */
    192   .stab          0 : { *(.stab) }
    193   .stabstr       0 : { *(.stabstr) }
    194   .stab.excl     0 : { *(.stab.excl) }
    195   .stab.exclstr  0 : { *(.stab.exclstr) }
    196   .stab.index    0 : { *(.stab.index) }
    197   .stab.indexstr 0 : { *(.stab.indexstr) }
    198   .comment       0 : { *(.comment) }
    199   /* DWARF debug sections.
    200      Symbols in the DWARF debugging sections are relative to the beginning
    201      of the section so we begin them at 0.  */
    202   /* DWARF 1 */
    203   .debug          0 : { *(.debug) }
    204   .line           0 : { *(.line) }
    205   /* GNU DWARF 1 extensions */
    206   .debug_srcinfo  0 : { *(.debug_srcinfo) }
    207   .debug_sfnames  0 : { *(.debug_sfnames) }
    208   /* DWARF 1.1 and DWARF 2 */
    209   .debug_aranges  0 : { *(.debug_aranges) }
    210   .debug_pubnames 0 : { *(.debug_pubnames) }
    211   /* DWARF 2 */
    212   .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
    213   .debug_abbrev   0 : { *(.debug_abbrev) }
    214   .debug_line     0 : { *(.debug_line .debug_line.* .debug_line_end ) }
    215   .debug_frame    0 : { *(.debug_frame) }
    216   .debug_str      0 : { *(.debug_str) }
    217   .debug_loc      0 : { *(.debug_loc) }
    218   .debug_macinfo  0 : { *(.debug_macinfo) }
    219   /* SGI/MIPS DWARF 2 extensions */
    220   .debug_weaknames 0 : { *(.debug_weaknames) }
    221   .debug_funcnames 0 : { *(.debug_funcnames) }
    222   .debug_typenames 0 : { *(.debug_typenames) }
    223   .debug_varnames  0 : { *(.debug_varnames) }
    224   /* DWARF 3 */
    225   .debug_pubtypes 0 : { *(.debug_pubtypes) }
    226   .debug_ranges   0 : { *(.debug_ranges) }
    227   /* DWARF Extension.  */
    228   .debug_macro    0 : { *(.debug_macro) }
    229   .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
    230   /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) *(.mdebug.*) }
    231 }
    232