Merge remote branch 'alsa/devel' into topic/misc

[pandora-kernel.git] / arch / x86 / vdso / vdso.lds.S

diff --git a/arch/x86/vdso/vdso.lds.S b/arch/x86/vdso/vdso.lds.S
index b9a60e6..4e5dd3b 100644 (file)
--- a/arch/x86/vdso/vdso.lds.S
+++ b/arch/x86/vdso/vdso.lds.S
@@ -1,77 +1,37 @@
 /*
- * Linker script for vsyscall DSO.  The vsyscall page is an ELF shared
- * object prelinked to its virtual address, and with only one read-only
- * segment (that fits in one page).  This script controls its layout.
+ * Linker script for 64-bit vDSO.
+ * We #include the file to define the layout details.
+ * Here we only choose the prelinked virtual address.
+ *
+ * This file defines the version script giving the user-exported symbols in
+ * the DSO.  We can define local symbols here called VDSO* to make their
+ * values visible using the asm-x86/vdso.h macros from the kernel proper.
  */
-#include <asm/asm-offsets.h>
-#include "voffset.h"
 
 #define VDSO_PRELINK 0xffffffffff700000
-
-SECTIONS
-{
-  . = VDSO_PRELINK + SIZEOF_HEADERS;
-
-  .hash           : { *(.hash) }               :text
-  .gnu.hash       : { *(.gnu.hash) }
-  .dynsym         : { *(.dynsym) }
-  .dynstr         : { *(.dynstr) }
-  .gnu.version    : { *(.gnu.version) }
-  .gnu.version_d  : { *(.gnu.version_d) }
-  .gnu.version_r  : { *(.gnu.version_r) }
-
-  /* This linker script is used both with -r and with -shared.
-     For the layouts to match, we need to skip more than enough
-     space for the dynamic symbol table et al.  If this amount
-     is insufficient, ld -shared will barf.  Just increase it here.  */
-  . = VDSO_PRELINK + VDSO_TEXT_OFFSET;
-
-  .text           : { *(.text) }               :text
-  .text.ptr       : { *(.text.ptr) }           :text
-  . = VDSO_PRELINK + 0x900;
-  .data           : { *(.data) }               :text
-  .bss            : { *(.bss) }                        :text
-
-  .altinstructions : { *(.altinstructions) }                   :text
-  .altinstr_replacement  : { *(.altinstr_replacement) }        :text
-
-  .note                  : { *(.note.*) }              :text :note
-  .eh_frame_hdr   : { *(.eh_frame_hdr) }       :text :eh_frame_hdr
-  .eh_frame       : { KEEP (*(.eh_frame)) }    :text
-  .dynamic        : { *(.dynamic) }            :text :dynamic
-  .useless        : {
-       *(.got.plt) *(.got)
-       *(.gnu.linkonce.d.*)
-       *(.dynbss)
-       *(.gnu.linkonce.b.*)
-  }                                            :text
-}
+#include "vdso-layout.lds.S"
 
 /*
- * We must supply the ELF program headers explicitly to get just one
- * PT_LOAD segment, and set the flags explicitly to make segments read-only.
+ * This controls what userland symbols we export from the vDSO.
  */
-PHDRS
-{
-  text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
-  dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
-  note PT_NOTE FLAGS(4); /* PF_R */
-  eh_frame_hdr 0x6474e550; /* PT_GNU_EH_FRAME, but ld doesn't match the name */
+VERSION {
+       LINUX_2.6 {
+       global:
+               clock_gettime;
+               __vdso_clock_gettime;
+               gettimeofday;
+               __vdso_gettimeofday;
+               getcpu;
+               __vdso_getcpu;
+       local: *;
+       };
 }
 
+VDSO64_PRELINK = VDSO_PRELINK;
+
 /*
- * This controls what symbols we export from the DSO.
+ * Define VDSO64_x for each VEXTERN(x), for use via VDSO64_SYMBOL.
  */
-VERSION
-{
-  LINUX_2.6 {
-    global:
-       clock_gettime;
-       __vdso_clock_gettime;
-       gettimeofday;
-       __vdso_gettimeofday;
-       getcpu;
-       __vdso_getcpu;
-    local: *;
-  };
-}
+#define VEXTERN(x)     VDSO64_ ## x = vdso_ ## x;
+#include "vextern.h"
+#undef VEXTERN