root/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__
   9 OUTPUT_FORMAT("elf32-powerpcle", "elf32-powerpcle", "elf32-powerpcle")
  10 #else
  11 OUTPUT_FORMAT("elf32-powerpc", "elf32-powerpc", "elf32-powerpc")
  12 #endif
  13 OUTPUT_ARCH(powerpc:common)
  14 ENTRY(_start)
  15 
  16 SECTIONS
  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  */
 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 #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 #ifdef CONFIG_PPC64
 159                 __kernel_getcpu;
 160 #endif
 161 
 162         local: *;
 163         };
 164 }