arch/mips/vdso/vdso.lds.S

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Copyright (C) 2015 Imagination Technologies
   4  * Author: Alex Smith <alex.smith@imgtec.com>
   5  */
   6
   7 #include <asm/sgidefs.h>
   8
   9 #if _MIPS_SIM == _MIPS_SIM_ABI64
  10 OUTPUT_FORMAT("elf64-tradlittlemips", "elf64-tradbigmips", "elf64-tradlittlemips")
  11 #elif _MIPS_SIM == _MIPS_SIM_NABI32
  12 OUTPUT_FORMAT("elf32-ntradlittlemips", "elf32-ntradbigmips", "elf32-ntradlittlemips")
  13 #else
  14 OUTPUT_FORMAT("elf32-tradlittlemips", "elf32-tradbigmips", "elf32-tradlittlemips")
  15 #endif
  16
  17 OUTPUT_ARCH(mips)
  18
  19 SECTIONS
  20 {
  21         PROVIDE(_start = .);
  22         . = SIZEOF_HEADERS;
  23
  24         /*
  25          * In order to retain compatibility with older toolchains we provide the
  26          * ABI flags section ourself. Newer assemblers will automatically
  27          * generate .MIPS.abiflags sections so we discard such input sections,
  28          * and then manually define our own section here. genvdso will patch
  29          * this section to have the correct name/type.
  30          */
  31         .mips_abiflags  : { *(.mips_abiflags) }         :text :abiflags
  32
  33         .reginfo        : { *(.reginfo) }               :text :reginfo
  34
  35         .hash           : { *(.hash) }                  :text
  36         .gnu.hash       : { *(.gnu.hash) }
  37         .dynsym         : { *(.dynsym) }
  38         .dynstr         : { *(.dynstr) }
  39         .gnu.version    : { *(.gnu.version) }
  40         .gnu.version_d  : { *(.gnu.version_d) }
  41         .gnu.version_r  : { *(.gnu.version_r) }
  42
  43         .note           : { *(.note.*) }                :text :note
  44
  45         .text           : { *(.text*) }                 :text
  46         PROVIDE (__etext = .);
  47         PROVIDE (_etext = .);
  48         PROVIDE (etext = .);
  49
  50         .eh_frame_hdr   : { *(.eh_frame_hdr) }          :text :eh_frame_hdr
  51         .eh_frame       : { KEEP (*(.eh_frame)) }       :text
  52
  53         .dynamic        : { *(.dynamic) }               :text :dynamic
  54
  55         .rodata         : { *(.rodata*) }               :text
  56
  57         _end = .;
  58         PROVIDE(end = .);
  59
  60         /DISCARD/       : {
  61                 *(.MIPS.abiflags)
  62                 *(.gnu.attributes)
  63                 *(.note.GNU-stack)
  64                 *(.data .data.* .gnu.linkonce.d.* .sdata*)
  65                 *(.bss .sbss .dynbss .dynsbss)
  66         }
  67 }
  68
  69 PHDRS
  70 {
  71         /*
  72          * Provide a PT_MIPS_ABIFLAGS header to assign the ABI flags section
  73          * to. We can specify the header type directly here so no modification
  74          * is needed later on.
  75          */
  76         abiflags        0x70000003;
  77
  78         /*
  79          * The ABI flags header must exist directly after the PT_INTERP header,
  80          * so we must explicitly place the PT_MIPS_REGINFO header after it to
  81          * stop the linker putting one in at the start.
  82          */
  83         reginfo         0x70000000;
  84
  85         text            PT_LOAD         FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */
  86         dynamic         PT_DYNAMIC      FLAGS(4);               /* PF_R */
  87         note            PT_NOTE         FLAGS(4);               /* PF_R */
  88         eh_frame_hdr    PT_GNU_EH_FRAME;
  89 }
  90
  91 VERSION
  92 {
  93         LINUX_2.6 {
  94 #ifndef DISABLE_MIPS_VDSO
  95         global:
  96                 __vdso_clock_gettime;
  97                 __vdso_gettimeofday;
  98 #endif
  99         local: *;
 100         };
 101 }