LXR linux/arch/ia64/kernel/gate.lds.S

   1/*
   2 * Linker script for gate DSO.  The gate pages are an ELF shared object
   3 * prelinked to its virtual address, with only one read-only segment and
   4 * one execute-only segment (both fit in one page).  This script controls
   5 * its layout.
   6 */
   7
   8#include <asm/page.h>
   9
  10SECTIONS
  11{
  12        . = GATE_ADDR + SIZEOF_HEADERS;
  13
  14        .hash                   : { *(.hash) }          :readable
  15        .gnu.hash               : { *(.gnu.hash) }
  16        .dynsym                 : { *(.dynsym) }
  17        .dynstr                 : { *(.dynstr) }
  18        .gnu.version            : { *(.gnu.version) }
  19        .gnu.version_d          : { *(.gnu.version_d) }
  20        .gnu.version_r          : { *(.gnu.version_r) }
  21
  22        .note                   : { *(.note*) }         :readable       :note
  23
  24        .dynamic                : { *(.dynamic) }       :readable       :dynamic
  25
  26        /*
  27         * This linker script is used both with -r and with -shared.  For
  28         * the layouts to match, we need to skip more than enough space for
  29         * the dynamic symbol table et al.  If this amount is insufficient,
  30         * ld -shared will barf.  Just increase it here.
  31         */
  32        . = GATE_ADDR + 0x600;
  33
  34        .data..patch            : {
  35                __start_gate_mckinley_e9_patchlist = .;
  36                *(.data..patch.mckinley_e9)
  37                __end_gate_mckinley_e9_patchlist = .;
  38
  39                __start_gate_vtop_patchlist = .;
  40                *(.data..patch.vtop)
  41                __end_gate_vtop_patchlist = .;
  42
  43                __start_gate_fsyscall_patchlist = .;
  44                *(.data..patch.fsyscall_table)
  45                __end_gate_fsyscall_patchlist = .;
  46
  47                __start_gate_brl_fsys_bubble_down_patchlist = .;
  48                *(.data..patch.brl_fsys_bubble_down)
  49                __end_gate_brl_fsys_bubble_down_patchlist = .;
  50        }                                               :readable
  51
  52        .IA_64.unwind_info      : { *(.IA_64.unwind_info*) }
  53        .IA_64.unwind           : { *(.IA_64.unwind*) } :readable       :unwind
  54#ifdef HAVE_BUGGY_SEGREL
  55        .text (GATE_ADDR + PAGE_SIZE) : { *(.text) *(.text.*) } :readable
  56#else
  57        . = ALIGN(PERCPU_PAGE_SIZE) + (. & (PERCPU_PAGE_SIZE - 1));
  58        .text                   : { *(.text) *(.text.*) }       :epc
  59#endif
  60
  61        /DISCARD/               : {
  62                *(.got.plt) *(.got)
  63                *(.data .data.* .gnu.linkonce.d.*)
  64                *(.dynbss)
  65                *(.bss .bss.* .gnu.linkonce.b.*)
  66                *(__ex_table)
  67                *(__mca_table)
  68        }
  69}
  70
  71/*
  72 * ld does not recognize this name token; use the constant.
  73 */
  74#define PT_IA_64_UNWIND 0x70000001
  75
  76/*
  77 * We must supply the ELF program headers explicitly to get just one
  78 * PT_LOAD segment, and set the flags explicitly to make segments read-only.
  79 */
  80PHDRS
  81{
  82        readable        PT_LOAD FILEHDR PHDRS   FLAGS(4);       /* PF_R */
  83#ifndef HAVE_BUGGY_SEGREL
  84        epc             PT_LOAD FILEHDR PHDRS   FLAGS(1);       /* PF_X */
  85#endif
  86        dynamic         PT_DYNAMIC              FLAGS(4);       /* PF_R */
  87        note            PT_NOTE                 FLAGS(4);       /* PF_R */
  88        unwind          PT_IA_64_UNWIND;
  89}
  90
  91/*
  92 * This controls what symbols we export from the DSO.
  93 */
  94VERSION
  95{
  96        LINUX_2.5 {
  97        global:
  98                __kernel_syscall_via_break;
  99                __kernel_syscall_via_epc;
 100                __kernel_sigtramp;
 101
 102        local: *;
 103        };
 104}
 105
 106/* The ELF entry point can be used to set the AT_SYSINFO value.  */
 107ENTRY(__kernel_syscall_via_epc)
 108