root/arch/s390/kernel/vdso64/vdso64.lds.S

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * This is the infamous ld script for the 64 bits vdso
   4  * library
   5  */
   6 
   7 #include <asm/page.h>
   8 #include <asm/vdso.h>
   9 
  10 OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
  11 OUTPUT_ARCH(s390:64-bit)
  12 ENTRY(_start)
  13 
  14 SECTIONS
  15 {
  16         . = VDSO64_LBASE + SIZEOF_HEADERS;
  17 
  18         .hash           : { *(.hash) }                  :text
  19         .gnu.hash       : { *(.gnu.hash) }
  20         .dynsym         : { *(.dynsym) }
  21         .dynstr         : { *(.dynstr) }
  22         .gnu.version    : { *(.gnu.version) }
  23         .gnu.version_d  : { *(.gnu.version_d) }
  24         .gnu.version_r  : { *(.gnu.version_r) }
  25 
  26         .note           : { *(.note.*) }                :text   :note
  27 
  28         . = ALIGN(16);
  29         .text           : {
  30                 *(.text .stub .text.* .gnu.linkonce.t.*)
  31         } :text
  32         PROVIDE(__etext = .);
  33         PROVIDE(_etext = .);
  34         PROVIDE(etext = .);
  35 
  36         /*
  37          * Other stuff is appended to the text segment:
  38          */
  39         .rodata         : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
  40         .rodata1        : { *(.rodata1) }
  41 
  42         .dynamic        : { *(.dynamic) }               :text   :dynamic
  43 
  44         .eh_frame_hdr   : { *(.eh_frame_hdr) }          :text   :eh_frame_hdr
  45         .eh_frame       : { KEEP (*(.eh_frame)) }       :text
  46         .gcc_except_table : { *(.gcc_except_table .gcc_except_table.*) }
  47 
  48         .rela.dyn ALIGN(8) : { *(.rela.dyn) }
  49         .got ALIGN(8)   : { *(.got .toc) }
  50 
  51         _end = .;
  52         PROVIDE(end = .);
  53 
  54         /*
  55          * Stabs debugging sections are here too.
  56          */
  57         .stab          0 : { *(.stab) }
  58         .stabstr       0 : { *(.stabstr) }
  59         .stab.excl     0 : { *(.stab.excl) }
  60         .stab.exclstr  0 : { *(.stab.exclstr) }
  61         .stab.index    0 : { *(.stab.index) }
  62         .stab.indexstr 0 : { *(.stab.indexstr) }
  63         .comment       0 : { *(.comment) }
  64 
  65         /*
  66          * DWARF debug sections.
  67          * Symbols in the DWARF debugging sections are relative to the
  68          * beginning of the section so we begin them at 0.
  69          */
  70         /* DWARF 1 */
  71         .debug          0 : { *(.debug) }
  72         .line           0 : { *(.line) }
  73         /* GNU DWARF 1 extensions */
  74         .debug_srcinfo  0 : { *(.debug_srcinfo) }
  75         .debug_sfnames  0 : { *(.debug_sfnames) }
  76         /* DWARF 1.1 and DWARF 2 */
  77         .debug_aranges  0 : { *(.debug_aranges) }
  78         .debug_pubnames 0 : { *(.debug_pubnames) }
  79         /* DWARF 2 */
  80         .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
  81         .debug_abbrev   0 : { *(.debug_abbrev) }
  82         .debug_line     0 : { *(.debug_line) }
  83         .debug_frame    0 : { *(.debug_frame) }
  84         .debug_str      0 : { *(.debug_str) }
  85         .debug_loc      0 : { *(.debug_loc) }
  86         .debug_macinfo  0 : { *(.debug_macinfo) }
  87         /* SGI/MIPS DWARF 2 extensions */
  88         .debug_weaknames 0 : { *(.debug_weaknames) }
  89         .debug_funcnames 0 : { *(.debug_funcnames) }
  90         .debug_typenames 0 : { *(.debug_typenames) }
  91         .debug_varnames  0 : { *(.debug_varnames) }
  92         /* DWARF 3 */
  93         .debug_pubtypes 0 : { *(.debug_pubtypes) }
  94         .debug_ranges   0 : { *(.debug_ranges) }
  95         .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
  96 
  97         . = ALIGN(PAGE_SIZE);
  98         PROVIDE(_vdso_data = .);
  99 
 100         /DISCARD/       : {
 101                 *(.note.GNU-stack)
 102                 *(.branch_lt)
 103                 *(.data .data.* .gnu.linkonce.d.* .sdata*)
 104                 *(.bss .sbss .dynbss .dynsbss)
 105         }
 106 }
 107 
 108 /*
 109  * Very old versions of ld do not recognize this name token; use the constant.
 110  */
 111 #define PT_GNU_EH_FRAME 0x6474e550
 112 
 113 /*
 114  * We must supply the ELF program headers explicitly to get just one
 115  * PT_LOAD segment, and set the flags explicitly to make segments read-only.
 116  */
 117 PHDRS
 118 {
 119         text            PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
 120         dynamic         PT_DYNAMIC FLAGS(4);            /* PF_R */
 121         note            PT_NOTE FLAGS(4);               /* PF_R */
 122         eh_frame_hdr    PT_GNU_EH_FRAME;
 123 }
 124 
 125 /*
 126  * This controls what symbols we export from the DSO.
 127  */
 128 VERSION
 129 {
 130         VDSO_VERSION_STRING {
 131         global:
 132                 /*
 133                  * Has to be there for the kernel to find
 134                  */
 135                 __kernel_gettimeofday;
 136                 __kernel_clock_gettime;
 137                 __kernel_clock_getres;
 138                 __kernel_getcpu;
 139 
 140         local: *;
 141         };
 142 }