1 files changed, 64 insertions, 0 deletions

diff --git a/arch/x86/vdso/vdso-layout.lds.S b/arch/x86/vdso/vdso-layout.lds.S
new file mode 100644
index 000000000000..634a2cf62046
--- /dev/null
+++ b/arch/x86/vdso/vdso-layout.lds.S
@@ -0,0 +1,64 @@
+/*
+ * Linker script for vDSO.  This is an ELF shared object prelinked to
+ * its virtual address, and with only one read-only segment.
+ * This script controls its layout.
+ */
+
+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) }
+
+        .note           : { *(.note.*) }                :text   :note
+
+        .eh_frame_hdr   : { *(.eh_frame_hdr) }          :text   :eh_frame_hdr
+        .eh_frame       : { KEEP (*(.eh_frame)) }       :text
+
+        .dynamic        : { *(.dynamic) }               :text   :dynamic
+
+        .rodata         : { *(.rodata*) }               :text
+        .data           : {
+              *(.data*)
+              *(.sdata*)
+              *(.got.plt) *(.got)
+              *(.gnu.linkonce.d.*)
+              *(.bss*)
+              *(.dynbss*)
+              *(.gnu.linkonce.b.*)
+        }
+
+        .altinstructions        : { *(.altinstructions) }
+        .altinstr_replacement   : { *(.altinstr_replacement) }
+
+        /*
+         * Align the actual code well away from the non-instruction data.
+         * This is the best thing for the I-cache.
+         */
+        . = ALIGN(0x100);
+
+        .text           : { *(.text*) }                 :text   =0x90909090
+}
+
+/*
+ * Very old versions of ld do not recognize this name token; use the constant.
+ */
+#define PT_GNU_EH_FRAME 0x6474e550
+
+/*
+ * 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.
+ */
+PHDRS
+{
+        text            PT_LOAD         FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */
+        dynamic         PT_DYNAMIC      FLAGS(4);               /* PF_R */
+        note            PT_NOTE         FLAGS(4);               /* PF_R */
+        eh_frame_hdr    PT_GNU_EH_FRAME;
+}