LXR linux/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__
   9OUTPUT_FORMAT("elf64-powerpcle", "elf64-powerpcle", "elf64-powerpcle")
  10#else
  11OUTPUT_FORMAT("elf64-powerpc", "elf64-powerpc", "elf64-powerpc")
  12#endif
  13OUTPUT_ARCH(powerpc:common64)
  14ENTRY(_start)
  15
  16SECTIONS
  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 */
 126PHDRS
 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 */
 137VERSION
 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}
 160