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.mips.cfe

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    1 /*-
    2  * Copyright (c) 2001, 2004, 2008, Juniper Networks, Inc.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. Neither the name of the Juniper Networks, Inc. nor the names of its
   14  *    contributors may be used to endorse or promote products derived from
   15  *    this software without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY JUNIPER NETWORKS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED. IN NO EVENT SHALL JUNIPER NETWORKS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      JNPR: ldscript.mips,v 1.3 2006/10/11 06:12:04
   30  * $FreeBSD$
   31  */
   32 
   33 /*
   34  * This linker script is needed to build a kernel for use by Broadcom CFE
   35  * when loaded over TFTP; its ELF loader does not support backwards seek
   36  * on network I/O streams.
   37  * Furthermore, CFE will only load PT_LOAD segments, therefore the dynamic
   38  * sections must be placed in their own segment.
   39  */
   40 
   41 OUTPUT_FORMAT("elf32-tradbigmips", "elf32-tradbigmips", 
   42                 "elf32-tradlittlemips")
   43 
   44 OUTPUT_ARCH(mips)
   45 ENTRY(_start)
   46 SEARCH_DIR(/usr/lib);
   47 /* Do we need any of these for elf?
   48    __DYNAMIC = 0;
   49 PROVIDE (_DYNAMIC = 0);
   50 */
   51 
   52 PHDRS
   53 {
   54  headers PT_PHDR FILEHDR PHDRS ;
   55  interp PT_INTERP ;
   56  text PT_LOAD ;
   57  dynamic PT_LOAD ;
   58  data PT_LOAD ;
   59 }
   60 
   61 SECTIONS
   62 {
   63   /* Read-only sections, merged into text segment: */
   64   . = 0x80100000 ;
   65   .interp     : { *(.interp)    } :interp
   66   .hash          : { *(.hash)           } :text
   67   .dynsym        : { *(.dynsym)         }
   68   .dynstr        : { *(.dynstr)         }
   69   .gnu.version   : { *(.gnu.version)    }
   70   .gnu.version_d   : { *(.gnu.version_d)        }
   71   .gnu.version_r   : { *(.gnu.version_r)        }
   72   .rel.init      : { *(.rel.init)       }
   73   .rela.init     : { *(.rela.init)      }
   74   .rel.text      :
   75     {
   76       *(.rel.text)
   77       *(.rel.text.*)
   78       *(.rel.gnu.linkonce.t.*)
   79     }
   80   .rela.text     :
   81     {
   82       *(.rela.text)
   83       *(.rela.text.*)
   84       *(.rela.gnu.linkonce.t.*)
   85     }
   86   .rel.fini      : { *(.rel.fini)       }
   87   .rela.fini     : { *(.rela.fini)      }
   88   .rel.rodata    :
   89     {
   90       *(.rel.rodata)
   91       *(.rel.rodata.*)
   92       *(.rel.gnu.linkonce.r.*)
   93     }
   94   .rela.rodata   :
   95     {
   96       *(.rela.rodata)
   97       *(.rela.rodata.*)
   98       *(.rela.gnu.linkonce.r.*)
   99     }
  100   .rel.data      :
  101     {
  102       *(.rel.data)
  103       *(.rel.data.*)
  104       *(.rel.gnu.linkonce.d.*)
  105     }
  106   .rela.data     :
  107     {
  108       *(.rela.data)
  109       *(.rela.data.*)
  110       *(.rela.gnu.linkonce.d.*)
  111     }
  112   .rel.ctors     : { *(.rel.ctors)      }
  113   .rela.ctors    : { *(.rela.ctors)     }
  114   .rel.dtors     : { *(.rel.dtors)      }
  115   .rela.dtors    : { *(.rela.dtors)     }
  116   .rel.got       : { *(.rel.got)                }
  117   .rela.got      : { *(.rela.got)               }
  118   .rel.sdata     :
  119     {
  120       *(.rel.sdata)
  121       *(.rel.sdata.*)
  122       *(.rel.gnu.linkonce.s.*)
  123     }
  124   .rela.sdata     :
  125     {
  126       *(.rela.sdata)
  127       *(.rela.sdata.*)
  128       *(.rela.gnu.linkonce.s.*)
  129     }
  130   .rel.sbss      :
  131     { 
  132       *(.rel.sbss)
  133       *(.rel.sbss.*)
  134       *(.rel.gnu.linkonce.sb.*)
  135     }
  136   .rela.sbss     :
  137     {
  138       *(.rela.sbss)
  139       *(.rela.sbss.*)
  140       *(.rel.gnu.linkonce.sb.*)
  141     }
  142   .rel.sdata2    : 
  143     { 
  144       *(.rel.sdata2)
  145       *(.rel.sdata2.*)
  146       *(.rel.gnu.linkonce.s2.*)
  147     }
  148   .rela.sdata2   : 
  149     {
  150       *(.rela.sdata2)
  151       *(.rela.sdata2.*)
  152       *(.rela.gnu.linkonce.s2.*)
  153     }
  154   .rel.sbss2     : 
  155     { 
  156       *(.rel.sbss2)     
  157       *(.rel.sbss2.*)
  158       *(.rel.gnu.linkonce.sb2.*)
  159     }
  160   .rela.sbss2    : 
  161     { 
  162       *(.rela.sbss2)    
  163       *(.rela.sbss2.*)
  164       *(.rela.gnu.linkonce.sb2.*)
  165     }
  166   .rel.bss       : 
  167     { 
  168       *(.rel.bss)
  169       *(.rel.bss.*)
  170       *(.rel.gnu.linkonce.b.*)
  171     }
  172   .rela.bss      : 
  173     { 
  174       *(.rela.bss)
  175       *(.rela.bss.*)
  176       *(.rela.gnu.linkonce.b.*)
  177     }
  178   .rel.plt       : { *(.rel.plt)                }
  179   .rela.plt      : { *(.rela.plt)               }
  180   .init          : 
  181   { 
  182     KEEP (*(.init))
  183   } :text =0x1000000
  184   .text      :
  185   {
  186     *(.trap)
  187     *(.text)
  188     *(.text.*)
  189     *(.stub)
  190     /* .gnu.warning sections are handled specially by elf32.em.  */
  191     *(.gnu.warning)
  192     *(.gnu.linkonce.t.*)
  193   } =0x1000000
  194   .fini      :
  195   {
  196     KEEP (*(.fini))
  197   } =0x1000000
  198   PROVIDE (__etext = .);
  199   PROVIDE (_etext = .);
  200   PROVIDE (etext = .);
  201   .rodata   : { *(.rodata) *(.rodata.*) *(.gnu.linkonce.r.*) }
  202   .rodata1   : { *(.rodata1) }
  203   .reginfo : { *(.reginfo) }
  204   .sdata2   : { *(.sdata2) *(.sdata2.*) *(.gnu.linkonce.s2.*) }
  205   .sbss2   : { *(.sbss2) *(.sbss2.*) *(.gnu.linkonce.sb2.*) }
  206   . = ALIGN(0x2000) + (. & (0x2000 - 1));
  207   .data    :
  208   {
  209     *(.data)
  210     *(.data.*)
  211     *(.gnu.linkonce.d.*)
  212     SORT(CONSTRUCTORS)
  213   } :data
  214   .data1   : { *(.data1) }
  215   .eh_frame : { KEEP (*(.eh_frame)) }
  216   .gcc_except_table : { *(.gcc_except_table) }
  217   .ctors   : 
  218   {
  219     /* gcc uses crtbegin.o to find the start of
  220        the constructors, so we make sure it is
  221        first.  Because this is a wildcard, it
  222        doesn't matter if the user does not
  223        actually link against crtbegin.o; the
  224        linker won't look for a file to match a
  225        wildcard.  The wildcard also means that it
  226        doesn't matter which directory crtbegin.o
  227        is in.  */
  228     KEEP (*crtbegin.o(.ctors))
  229     /* We don't want to include the .ctor section from
  230        from the crtend.o file until after the sorted ctors.
  231        The .ctor section from the crtend file contains the
  232        end of ctors marker and it must be last */
  233     KEEP (*(EXCLUDE_FILE (*crtend.o ) .ctors))
  234     KEEP (*(SORT(.ctors.*)))
  235     KEEP (*(.ctors))
  236   }
  237    .dtors         :
  238   {
  239     KEEP (*crtbegin.o(.dtors))
  240     KEEP (*(EXCLUDE_FILE (*crtend.o ) .dtors))
  241     KEEP (*(SORT(.dtors.*)))
  242     KEEP (*(.dtors))
  243   }
  244   .plt      : { *(.plt) }
  245   _gp = ALIGN(16) + 0x7ff0;
  246   .got            : { *(.got.plt) *(.got) }
  247   .dynamic       : { *(.dynamic) } :dynamic
  248   /* We want the small data sections together, so single-instruction offsets
  249      can access them all, and initialized data all before uninitialized, so
  250      we can shorten the on-disk segment size.  */
  251   .sdata     : 
  252   {
  253     *(.sdata) 
  254     *(.sdata.*)
  255     *(.gnu.linkonce.s.*)
  256   }
  257   _edata = .;
  258   PROVIDE (edata = .);
  259   __bss_start = .;
  260   .sbss      :
  261   {
  262     PROVIDE (__sbss_start = .);
  263     PROVIDE (___sbss_start = .);
  264     *(.dynsbss)
  265     *(.sbss)
  266     *(.sbss.*)
  267     *(.gnu.linkonce.sb.*)
  268     *(.scommon)
  269     PROVIDE (__sbss_end = .);
  270     PROVIDE (___sbss_end = .);
  271   }
  272   .bss       :
  273   {
  274    *(.dynbss)
  275    *(.bss)
  276    *(.bss.*)
  277    *(.gnu.linkonce.b.*)
  278    *(COMMON)
  279    /* Align here to ensure that the .bss section occupies space up to
  280       _end.  Align after .bss to ensure correct alignment even if the
  281       .bss section disappears because there are no input sections.  */
  282    . = ALIGN(64 / 8);
  283   }
  284   . = ALIGN(64 / 8);
  285   _end = .;
  286   PROVIDE (end = .);
  287   /* Stabs debugging sections.  */
  288   .stab 0 : { *(.stab) }
  289   .stabstr 0 : { *(.stabstr) }
  290   .stab.excl 0 : { *(.stab.excl) }
  291   .stab.exclstr 0 : { *(.stab.exclstr) }
  292   .stab.index 0 : { *(.stab.index) }
  293   .stab.indexstr 0 : { *(.stab.indexstr) }
  294   .comment 0 : { *(.comment) }
  295   /* DWARF debug sections.
  296      Symbols in the DWARF debugging sections are relative to the beginning
  297      of the section so we begin them at 0.  */
  298   /* DWARF 1 */
  299   .debug          0 : { *(.debug) }
  300   .line           0 : { *(.line) }
  301   /* GNU DWARF 1 extensions */
  302   .debug_srcinfo  0 : { *(.debug_srcinfo) }
  303   .debug_sfnames  0 : { *(.debug_sfnames) }
  304   /* DWARF 1.1 and DWARF 2 */
  305   .debug_aranges  0 : { *(.debug_aranges) }
  306   .debug_pubnames 0 : { *(.debug_pubnames) }
  307   /* DWARF 2 */
  308   .debug_info     0 : { *(.debug_info) *(.gnu.linkonce.wi.*) }
  309   .debug_abbrev   0 : { *(.debug_abbrev) }
  310   .debug_line     0 : { *(.debug_line) }
  311   .debug_frame    0 : { *(.debug_frame) }
  312   .debug_str      0 : { *(.debug_str) }
  313   .debug_loc      0 : { *(.debug_loc) }
  314   .debug_macinfo  0 : { *(.debug_macinfo) }
  315   /* SGI/MIPS DWARF 2 extensions */
  316   .debug_weaknames 0 : { *(.debug_weaknames) }
  317   .debug_funcnames 0 : { *(.debug_funcnames) }
  318   .debug_typenames 0 : { *(.debug_typenames) }
  319   .debug_varnames  0 : { *(.debug_varnames) }
  320   /* These must appear regardless of  .  */
  321 }

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