root/arch/powerpc/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 #include <asm/vdso.h>
   7 
   8 #ifdef __LITTLE_ENDIAN__
   9 OUTPUT_FORMAT("elf64-powerpcle", "elf64-powerpcle", "elf64-powerpcle")
  10 #else
  11 OUTPUT_FORMAT("elf64-powerpc", "elf64-powerpc", "elf64-powerpc")
  12 #endif
  13 OUTPUT_ARCH(powerpc:common64)
  14 ENTRY(_start)
  15 
  16 SECTIONS
  17 {
  18         . = VDSO64_LBASE + SIZEOF_HEADERS;
  19 
  20         .hash           : { *(.hash) }                  :text
  21         .gnu.hash       : { *(.gnu.hash) }
  22         .dynsym         : { *(.dynsym) }
  23         .dynstr         : { *(.dynstr) }
  24         .gnu.version    : { *(.gnu.version) }
  25         .gnu.version_d  : { *(.gnu.version_d) }
  26         .gnu.version_r  : { *(.gnu.version_r) }
  27 
  28         .note           : { *(.note.*) }                :text   :note
  29 
  30         . = ALIGN(16);
  31         .text           : {
  32                 *(.text .stub .text.* .gnu.linkonce.t.* __ftr_alt_*)
  33                 *(.sfpr .glink)
  34         }                                               :text
  35         PROVIDE(__etext = .);
  36         PROVIDE(_etext = .);
  37         PROVIDE(etext = .);
  38 
  39         . = ALIGN(8);
  40         __ftr_fixup     : { *(__ftr_fixup) }
  41 
  42         . = ALIGN(8);
  43         __mmu_ftr_fixup : { *(__mmu_ftr_fixup) }
  44 
  45         . = ALIGN(8);
  46         __lwsync_fixup  : { *(__lwsync_fixup) }
  47 
  48         . = ALIGN(8);
  49         __fw_ftr_fixup  : { *(__fw_ftr_fixup) }
  50 
  51         /*
  52          * Other stuff is appended to the text segment:
  53          */
  54         .rodata         : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
  55         .rodata1        : { *(.rodata1) }
  56 
  57         .dynamic        : { *(.dynamic) }               :text   :dynamic
  58 
  59         .eh_frame_hdr   : { *(.eh_frame_hdr) }          :text   :eh_frame_hdr
  60         .eh_frame       : { KEEP (*(.eh_frame)) }       :text
  61         .gcc_except_table : { *(.gcc_except_table) }
  62         .rela.dyn ALIGN(8) : { *(.rela.dyn) }
  63 
  64         .opd ALIGN(8)   : { KEEP (*(.opd)) }
  65         .got ALIGN(8)   : { *(.got .toc) }
  66 
  67         _end = .;
  68         PROVIDE(end = .);
  69 
  70         /*
  71          * Stabs debugging sections are here too.
  72          */
  73         .stab          0 : { *(.stab) }
  74         .stabstr       0 : { *(.stabstr) }
  75         .stab.excl     0 : { *(.stab.excl) }
  76         .stab.exclstr  0 : { *(.stab.exclstr) }
  77         .stab.index    0 : { *(.stab.index) }
  78         .stab.indexstr 0 : { *(.stab.indexstr) }
  79         .comment       0 : { *(.comment) }
  80 
  81         /*
  82          * DWARF debug sections.
  83          * Symbols in the DWARF debugging sections are relative to the beginning
  84          * of the section so we begin them at 0.
  85          */
  86         /* DWARF 1 */
  87         .debug          0 : { *(.debug) }
  88         .line           0 : { *(.line) }
  89         /* GNU DWARF 1 extensions */
  90         .debug_srcinfo  0 : { *(.debug_srcinfo) }
  91         .debug_sfnames  0 : { *(.debug_sfnames) }
  92         /* DWARF 1.1 and DWARF 2 */
  93         .debug_aranges  0 : { *(.debug_aranges) }
  94         .debug_pubnames 0 : { *(.debug_pubnames) }
  95         /* DWARF 2 */
  96         .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
  97         .debug_abbrev   0 : { *(.debug_abbrev) }
  98         .debug_line     0 : { *(.debug_line) }
  99         .debug_frame    0 : { *(.debug_frame) }
 100         .debug_str      0 : { *(.debug_str) }
 101         .debug_loc      0 : { *(.debug_loc) }
 102         .debug_macinfo  0 : { *(.debug_macinfo) }
 103         /* SGI/MIPS DWARF 2 extensions */
 104         .debug_weaknames 0 : { *(.debug_weaknames) }
 105         .debug_funcnames 0 : { *(.debug_funcnames) }
 106         .debug_typenames 0 : { *(.debug_typenames) }
 107         .debug_varnames  0 : { *(.debug_varnames) }
 108 
 109         /DISCARD/       : {
 110                 *(.note.GNU-stack)
 111                 *(.branch_lt)
 112                 *(.data .data.* .gnu.linkonce.d.* .sdata*)
 113                 *(.bss .sbss .dynbss .dynsbss)
 114         }
 115 }
 116 
 117 /*
 118  * Very old versions of ld do not recognize this name token; use the constant.
 119  */
 120 #define PT_GNU_EH_FRAME 0x6474e550
 121 
 122 /*
 123  * We must supply the ELF program headers explicitly to get just one
 124  * PT_LOAD segment, and set the flags explicitly to make segments read-only.
 125  */
 126 PHDRS
 127 {
 128         text            PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
 129         dynamic         PT_DYNAMIC FLAGS(4);            /* PF_R */
 130         note            PT_NOTE FLAGS(4);               /* PF_R */
 131         eh_frame_hdr    PT_GNU_EH_FRAME;
 132 }
 133 
 134 /*
 135  * This controls what symbols we export from the DSO.
 136  */
 137 VERSION
 138 {
 139         VDSO_VERSION_STRING {
 140         global:
 141                 /*
 142                  * Has to be there for the kernel to find
 143                  */
 144                 __kernel_datapage_offset;
 145 
 146                 __kernel_get_syscall_map;
 147                 __kernel_gettimeofday;
 148                 __kernel_clock_gettime;
 149                 __kernel_clock_getres;
 150                 __kernel_get_tbfreq;
 151                 __kernel_sync_dicache;
 152                 __kernel_sync_dicache_p5;
 153                 __kernel_sigtramp_rt64;
 154                 __kernel_getcpu;
 155                 __kernel_time;
 156 
 157         local: *;
 158         };
 159 }