LXR linux/arch/powerpc/kernel/vdso32/vdso32.lds.S

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * This is the infamous ld script for the 32 bits vdso
   4 * library
   5 */
   6#include <asm/vdso.h>
   7
   8#ifdef __LITTLE_ENDIAN__
   9OUTPUT_FORMAT("elf32-powerpcle", "elf32-powerpcle", "elf32-powerpcle")
  10#else
  11OUTPUT_FORMAT("elf32-powerpc", "elf32-powerpc", "elf32-powerpc")
  12#endif
  13OUTPUT_ARCH(powerpc:common)
  14ENTRY(_start)
  15
  16SECTIONS
  17{
  18        . = VDSO32_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        }                                               :text
  34        PROVIDE(__etext = .);
  35        PROVIDE(_etext = .);
  36        PROVIDE(etext = .);
  37
  38        . = ALIGN(8);
  39        __ftr_fixup     : { *(__ftr_fixup) }
  40
  41        . = ALIGN(8);
  42        __mmu_ftr_fixup : { *(__mmu_ftr_fixup) }
  43
  44        . = ALIGN(8);
  45        __lwsync_fixup  : { *(__lwsync_fixup) }
  46
  47#ifdef CONFIG_PPC64
  48        . = ALIGN(8);
  49        __fw_ftr_fixup  : { *(__fw_ftr_fixup) }
  50#endif
  51
  52        /*
  53         * Other stuff is appended to the text segment:
  54         */
  55        .rodata         : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
  56        .rodata1        : { *(.rodata1) }
  57
  58        .eh_frame_hdr   : { *(.eh_frame_hdr) }          :text   :eh_frame_hdr
  59        .eh_frame       : { KEEP (*(.eh_frame)) }       :text
  60        .gcc_except_table : { *(.gcc_except_table) }
  61        .fixup          : { *(.fixup) }
  62
  63        .dynamic        : { *(.dynamic) }               :text   :dynamic
  64        .got            : { *(.got) }                   :text
  65        .plt            : { *(.plt) }
  66
  67        _end = .;
  68        __end = .;
  69        PROVIDE(end = .);
  70
  71        /*
  72         * Stabs debugging sections are here too.
  73         */
  74        .stab 0 : { *(.stab) }
  75        .stabstr 0 : { *(.stabstr) }
  76        .stab.excl 0 : { *(.stab.excl) }
  77        .stab.exclstr 0 : { *(.stab.exclstr) }
  78        .stab.index 0 : { *(.stab.index) }
  79        .stab.indexstr 0 : { *(.stab.indexstr) }
  80        .comment       0 : { *(.comment) }
  81
  82        /*
  83         * DWARF debug sections.
  84         * Symbols in the DWARF debugging sections are relative to the beginning
  85         * of the section so we begin them at 0.
  86         */
  87        /* DWARF 1 */
  88        .debug          0 : { *(.debug) }
  89        .line           0 : { *(.line) }
  90        /* GNU DWARF 1 extensions */
  91        .debug_srcinfo  0 : { *(.debug_srcinfo) }
  92        .debug_sfnames  0 : { *(.debug_sfnames) }
  93        /* DWARF 1.1 and DWARF 2 */
  94        .debug_aranges  0 : { *(.debug_aranges) }
  95        .debug_pubnames 0 : { *(.debug_pubnames) }
  96        /* DWARF 2 */
  97        .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
  98        .debug_abbrev   0 : { *(.debug_abbrev) }
  99        .debug_line     0 : { *(.debug_line) }
 100        .debug_frame    0 : { *(.debug_frame) }
 101        .debug_str      0 : { *(.debug_str) }
 102        .debug_loc      0 : { *(.debug_loc) }
 103        .debug_macinfo  0 : { *(.debug_macinfo) }
 104        /* SGI/MIPS DWARF 2 extensions */
 105        .debug_weaknames 0 : { *(.debug_weaknames) }
 106        .debug_funcnames 0 : { *(.debug_funcnames) }
 107        .debug_typenames 0 : { *(.debug_typenames) }
 108        .debug_varnames  0 : { *(.debug_varnames) }
 109
 110        /DISCARD/       : {
 111                *(.note.GNU-stack)
 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#ifndef CONFIG_PPC_BOOK3S_601
 148                __kernel_gettimeofday;
 149                __kernel_clock_gettime;
 150                __kernel_clock_getres;
 151                __kernel_time;
 152                __kernel_get_tbfreq;
 153#endif
 154                __kernel_sync_dicache;
 155                __kernel_sync_dicache_p5;
 156                __kernel_sigtramp32;
 157                __kernel_sigtramp_rt32;
 158#if defined(CONFIG_PPC64) || !defined(CONFIG_SMP)
 159                __kernel_getcpu;
 160#endif
 161
 162        local: *;
 163        };
 164}
 165