arch/x86/um/vdso/vdso-layout.lds.S

   1 /*
   2  * Linker script for vDSO.  This is an ELF shared object prelinked to
   3  * its virtual address, and with only one read-only segment.
   4  * This script controls its layout.
   5  */
   6
   7 SECTIONS
   8 {
   9         . = VDSO_PRELINK + SIZEOF_HEADERS;
  10
  11         .hash           : { *(.hash) }                  :text
  12         .gnu.hash       : { *(.gnu.hash) }
  13         .dynsym         : { *(.dynsym) }
  14         .dynstr         : { *(.dynstr) }
  15         .gnu.version    : { *(.gnu.version) }
  16         .gnu.version_d  : { *(.gnu.version_d) }
  17         .gnu.version_r  : { *(.gnu.version_r) }
  18
  19         .note           : { *(.note.*) }                :text   :note
  20
  21         .eh_frame_hdr   : { *(.eh_frame_hdr) }          :text   :eh_frame_hdr
  22         .eh_frame       : { KEEP (*(.eh_frame)) }       :text
  23
  24         .dynamic        : { *(.dynamic) }               :text   :dynamic
  25
  26         .rodata         : { *(.rodata*) }               :text
  27         .data           : {
  28               *(.data*)
  29               *(.sdata*)
  30               *(.got.plt) *(.got)
  31               *(.gnu.linkonce.d.*)
  32               *(.bss*)
  33               *(.dynbss*)
  34               *(.gnu.linkonce.b.*)
  35         }
  36
  37         .altinstructions        : { *(.altinstructions) }
  38         .altinstr_replacement   : { *(.altinstr_replacement) }
  39
  40         /*
  41          * Align the actual code well away from the non-instruction data.
  42          * This is the best thing for the I-cache.
  43          */
  44         . = ALIGN(0x100);
  45
  46         .text           : { *(.text*) }                 :text   =0x90909090
  47 }
  48
  49 /*
  50  * Very old versions of ld do not recognize this name token; use the constant.
  51  */
  52 #define PT_GNU_EH_FRAME 0x6474e550
  53
  54 /*
  55  * We must supply the ELF program headers explicitly to get just one
  56  * PT_LOAD segment, and set the flags explicitly to make segments read-only.
  57  */
  58 PHDRS
  59 {
  60         text            PT_LOAD         FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */
  61         dynamic         PT_DYNAMIC      FLAGS(4);               /* PF_R */
  62         note            PT_NOTE         FLAGS(4);               /* PF_R */
  63         eh_frame_hdr    PT_GNU_EH_FRAME;
  64 }