The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/conf/ldscript.amd64

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    1 /* $FreeBSD: stable/11/sys/conf/ldscript.amd64 327409 2017-12-31 03:35:34Z mjg $ */
    2 OUTPUT_FORMAT("elf64-x86-64-freebsd", "elf64-x86-64-freebsd", "elf64-x86-64-freebsd")
    3 OUTPUT_ARCH(i386:x86-64)
    4 ENTRY(btext)
    5 SEARCH_DIR("/usr/lib");
    6 SECTIONS
    7 {
    8   /* Read-only sections, merged into text segment: */
    9   kernphys = 0x200000;
   10   . = kernbase + kernphys + SIZEOF_HEADERS;
   11   /*
   12    * Use the AT keyword in order to set the right LMA that contains
   13    * the physical address where the section should be loaded. This is
   14    * needed for the Xen loader which honours the LMA.
   15    */
   16   .interp         : AT (kernphys + SIZEOF_HEADERS) { *(.interp) }
   17   .hash           : { *(.hash) }
   18   .gnu.hash       : { *(.gnu.hash) }
   19   .dynsym         : { *(.dynsym) }
   20   .dynstr         : { *(.dynstr) }
   21   .gnu.version    : { *(.gnu.version) }
   22   .gnu.version_d  : { *(.gnu.version_d) }
   23   .gnu.version_r  : { *(.gnu.version_r) }
   24   .rel.init       : { *(.rel.init) }
   25   .rela.init      : { *(.rela.init) }
   26   .rel.text       : { *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*) }
   27   .rela.text      : { *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) }
   28   .rel.fini       : { *(.rel.fini) }
   29   .rela.fini      : { *(.rela.fini) }
   30   .rel.rodata     : { *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*) }
   31   .rela.rodata    : { *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*) }
   32   .rel.data.rel.ro   : { *(.rel.data.rel.ro* .rel.gnu.linkonce.d.rel.ro.*) }
   33   .rela.data.rel.ro   : { *(.rela.data.rel.ro* .rela.gnu.linkonce.d.rel.ro.*) }
   34   .rel.data       : { *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*) }
   35   .rela.data      : { *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*) }
   36   .rel.tdata      : { *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*) }
   37   .rela.tdata     : { *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*) }
   38   .rel.tbss       : { *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*) }
   39   .rela.tbss      : { *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*) }
   40   .rel.ctors      : { *(.rel.ctors) }
   41   .rela.ctors     : { *(.rela.ctors) }
   42   .rel.dtors      : { *(.rel.dtors) }
   43   .rela.dtors     : { *(.rela.dtors) }
   44   .rel.got        : { *(.rel.got) }
   45   .rela.got       : { *(.rela.got) }
   46   .rel.bss        : { *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) }
   47   .rela.bss       : { *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*) }
   48   .rel.ldata      : { *(.rel.ldata .rel.ldata.* .rel.gnu.linkonce.l.*) }
   49   .rela.ldata     : { *(.rela.ldata .rela.ldata.* .rela.gnu.linkonce.l.*) }
   50   .rel.lbss       : { *(.rel.lbss .rel.lbss.* .rel.gnu.linkonce.lb.*) }
   51   .rela.lbss      : { *(.rela.lbss .rela.lbss.* .rela.gnu.linkonce.lb.*) }
   52   .rel.lrodata    : { *(.rel.lrodata .rel.lrodata.* .rel.gnu.linkonce.lr.*) }
   53   .rela.lrodata   : { *(.rela.lrodata .rela.lrodata.* .rela.gnu.linkonce.lr.*) }
   54   .rel.plt        : { *(.rel.plt) }
   55   .rela.plt       : { *(.rela.plt) }
   56   .init           :
   57   {
   58     KEEP (*(.init))
   59   } =0x90909090
   60   .plt            : { *(.plt) }
   61   .text           :
   62   {
   63     *(.text .stub .text.* .gnu.linkonce.t.*)
   64     KEEP (*(.text.*personality*))
   65     /* .gnu.warning sections are handled specially by elf32.em.  */
   66     *(.gnu.warning)
   67   } =0x90909090
   68   .fini           :
   69   {
   70     KEEP (*(.fini))
   71   } =0x90909090
   72   PROVIDE (__etext = .);
   73   PROVIDE (_etext = .);
   74   PROVIDE (etext = .);
   75   .rodata         : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
   76   .rodata1        : { *(.rodata1) }
   77   .eh_frame_hdr : { *(.eh_frame_hdr) }
   78   .eh_frame       : ONLY_IF_RO { KEEP (*(.eh_frame)) }
   79   .gcc_except_table   : ONLY_IF_RO { *(.gcc_except_table .gcc_except_table.*) }
   80   /* Adjust the address for the data segment.  We want to adjust up to
   81      the same address within the page on the next page up.  */
   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   /* Thread Local Storage sections  */
   87   .tdata          : { *(.tdata .tdata.* .gnu.linkonce.td.*) }
   88   .tbss           : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
   89   .preinit_array     :
   90   {
   91     PROVIDE_HIDDEN (__preinit_array_start = .);
   92     KEEP (*(.preinit_array))
   93     PROVIDE_HIDDEN (__preinit_array_end = .);
   94   }
   95   .init_array     :
   96   {
   97      PROVIDE_HIDDEN (__init_array_start = .);
   98      KEEP (*(SORT(.init_array.*)))
   99      KEEP (*(.init_array))
  100      PROVIDE_HIDDEN (__init_array_end = .);
  101   }
  102   .fini_array     :
  103   {
  104     PROVIDE_HIDDEN (__fini_array_start = .);
  105     KEEP (*(.fini_array))
  106     KEEP (*(SORT(.fini_array.*)))
  107     PROVIDE_HIDDEN (__fini_array_end = .);
  108   }
  109   _start_ctors = .;
  110   PROVIDE (start_ctors = .);
  111   .ctors          :
  112   {
  113     /* gcc uses crtbegin.o to find the start of
  114        the constructors, so we make sure it is
  115        first.  Because this is a wildcard, it
  116        doesn't matter if the user does not
  117        actually link against crtbegin.o; the
  118        linker won't look for a file to match a
  119        wildcard.  The wildcard also means that it
  120        doesn't matter which directory crtbegin.o
  121        is in.  */
  122     KEEP (*crtbegin.o(.ctors))
  123     KEEP (*crtbegin?.o(.ctors))
  124     /* We don't want to include the .ctor section from
  125        the crtend.o file until after the sorted ctors.
  126        The .ctor section from the crtend file contains the
  127        end of ctors marker and it must be last */
  128     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
  129     KEEP (*(SORT(.ctors.*)))
  130     KEEP (*(.ctors))
  131   }
  132   _stop_ctors = .;
  133   PROVIDE (stop_ctors = .);
  134   .dtors          :
  135   {
  136     KEEP (*crtbegin.o(.dtors))
  137     KEEP (*crtbegin?.o(.dtors))
  138     KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
  139     KEEP (*(SORT(.dtors.*)))
  140     KEEP (*(.dtors))
  141   }
  142   .jcr            : { KEEP (*(.jcr)) }
  143   .data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro* .gnu.linkonce.d.rel.ro.*) }
  144   .dynamic        : { *(.dynamic) }
  145   .got            : { *(.got) }
  146   . = DATA_SEGMENT_RELRO_END (24, .);
  147   .got.plt        : { *(.got.plt) }
  148   . = ALIGN(64);
  149   .data.read_frequently :
  150   {
  151     *(.data.read_frequently)
  152   }
  153   .data.read_mostly :
  154   {
  155     *(.data.read_mostly)
  156   }
  157   . = ALIGN(64);
  158   .data.exclusive_cache_line :
  159   {
  160     *(.data.exclusive_cache_line)
  161   }
  162   . = ALIGN(64);
  163   .data           :
  164   {
  165     *(.data .data.* .gnu.linkonce.d.*)
  166     KEEP (*(.gnu.linkonce.d.*personality*))
  167   }
  168   .data1          : { *(.data1) }
  169   _edata = .; PROVIDE (edata = .);
  170   __bss_start = .;
  171   .bss            :
  172   {
  173    *(.dynbss)
  174    *(.bss .bss.* .gnu.linkonce.b.*)
  175    *(COMMON)
  176    /* Align here to ensure that the .bss section occupies space up to
  177       _end.  Align after .bss to ensure correct alignment even if the
  178       .bss section disappears because there are no input sections.
  179       FIXME: Why do we need it? When there is no .bss section, we don't
  180       pad the .data section.  */
  181    . = ALIGN(. != 0 ? 64 / 8 : 1);
  182   }
  183   .lbss   :
  184   {
  185     *(.dynlbss)
  186     *(.lbss .lbss.* .gnu.linkonce.lb.*)
  187     *(LARGE_COMMON)
  188   }
  189   . = ALIGN(64 / 8);
  190   .lrodata   ALIGN(CONSTANT (MAXPAGESIZE)) + (. & (CONSTANT (MAXPAGESIZE) - 1)) :
  191   {
  192     *(.lrodata .lrodata.* .gnu.linkonce.lr.*)
  193   }
  194   .ldata   ALIGN(CONSTANT (MAXPAGESIZE)) + (. & (CONSTANT (MAXPAGESIZE) - 1)) :
  195   {
  196     *(.ldata .ldata.* .gnu.linkonce.l.*)
  197     . = ALIGN(. != 0 ? 64 / 8 : 1);
  198   }
  199   . = ALIGN(64 / 8);
  200   _end = .; PROVIDE (end = .);
  201   . = DATA_SEGMENT_END (.);
  202   /* Stabs debugging sections.  */
  203   .stab          0 : { *(.stab) }
  204   .stabstr       0 : { *(.stabstr) }
  205   .stab.excl     0 : { *(.stab.excl) }
  206   .stab.exclstr  0 : { *(.stab.exclstr) }
  207   .stab.index    0 : { *(.stab.index) }
  208   .stab.indexstr 0 : { *(.stab.indexstr) }
  209   .comment       0 : { *(.comment) }
  210   /* DWARF debug sections.
  211      Symbols in the DWARF debugging sections are relative to the beginning
  212      of the section so we begin them at 0.  */
  213   /* DWARF 1 */
  214   .debug          0 : { *(.debug) }
  215   .line           0 : { *(.line) }
  216   /* GNU DWARF 1 extensions */
  217   .debug_srcinfo  0 : { *(.debug_srcinfo) }
  218   .debug_sfnames  0 : { *(.debug_sfnames) }
  219   /* DWARF 1.1 and DWARF 2 */
  220   .debug_aranges  0 : { *(.debug_aranges) }
  221   .debug_pubnames 0 : { *(.debug_pubnames) }
  222   /* DWARF 2 */
  223   .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
  224   .debug_abbrev   0 : { *(.debug_abbrev) }
  225   .debug_line     0 : { *(.debug_line) }
  226   .debug_frame    0 : { *(.debug_frame) }
  227   .debug_str      0 : { *(.debug_str) }
  228   .debug_loc      0 : { *(.debug_loc) }
  229   .debug_macinfo  0 : { *(.debug_macinfo) }
  230   /* SGI/MIPS DWARF 2 extensions */
  231   .debug_weaknames 0 : { *(.debug_weaknames) }
  232   .debug_funcnames 0 : { *(.debug_funcnames) }
  233   .debug_typenames 0 : { *(.debug_typenames) }
  234   .debug_varnames  0 : { *(.debug_varnames) }
  235   /* DWARF 3 */
  236   .debug_pubtypes 0 : { *(.debug_pubtypes) }
  237   .debug_ranges   0 : { *(.debug_ranges) }
  238   .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
  239   /DISCARD/ : { *(.note.GNU-stack) }
  240 }

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