1 files changed, 53 insertions, 0 deletions

diff --git a/arch/x86/vdso/vdso32/int80.S b/arch/x86/vdso/vdso32/int80.S
new file mode 100644
index 000000000000..3c8e4c62ace3
--- /dev/null
+++ b/arch/x86/vdso/vdso32/int80.S
@@ -0,0 +1,53 @@
+/*
+ * Code for the vsyscall page.  This version uses the old int $0x80 method.
+ *
+ * NOTE:
+ * 1) __kernel_vsyscall _must_ be first in this page.
+ * 2) there are alignment constraints on this stub, see vsyscall-sigreturn.S
+ *    for details.
+ */
+
+        .text
+        .globl __kernel_vsyscall
+        .type __kernel_vsyscall,@function
+__kernel_vsyscall:
+.LSTART_vsyscall:
+        int $0x80
+        ret
+.LEND_vsyscall:
+        .size __kernel_vsyscall,.-.LSTART_vsyscall
+        .previous
+
+        .section .eh_frame,"a",@progbits
+.LSTARTFRAMEDLSI:
+        .long .LENDCIEDLSI-.LSTARTCIEDLSI
+.LSTARTCIEDLSI:
+        .long 0                 /* CIE ID */
+        .byte 1                 /* Version number */
+        .string "zR"            /* NUL-terminated augmentation string */
+        .uleb128 1              /* Code alignment factor */
+        .sleb128 -4             /* Data alignment factor */
+        .byte 8                 /* Return address register column */
+        .uleb128 1              /* Augmentation value length */
+        .byte 0x1b              /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */
+        .byte 0x0c              /* DW_CFA_def_cfa */
+        .uleb128 4
+        .uleb128 4
+        .byte 0x88              /* DW_CFA_offset, column 0x8 */
+        .uleb128 1
+        .align 4
+.LENDCIEDLSI:
+        .long .LENDFDEDLSI-.LSTARTFDEDLSI /* Length FDE */
+.LSTARTFDEDLSI:
+        .long .LSTARTFDEDLSI-.LSTARTFRAMEDLSI /* CIE pointer */
+        .long .LSTART_vsyscall-.        /* PC-relative start address */
+        .long .LEND_vsyscall-.LSTART_vsyscall
+        .uleb128 0
+        .align 4
+.LENDFDEDLSI:
+        .previous
+
+/*
+ * Get the common code for the sigreturn entry points.
+ */
+#include "sigreturn.S"