1 files changed, 15 insertions, 0 deletions

diff --git a/arch/um/sys-x86_64/stub.S b/arch/um/sys-x86_64/stub.S
new file mode 100644
index 000000000000..31c14925716b
--- /dev/null
+++ b/arch/um/sys-x86_64/stub.S
@@ -0,0 +1,15 @@
+#include "uml-config.h"
+
+        .globl syscall_stub
+.section .__syscall_stub, "x"
+syscall_stub:
+        syscall
+        /* We don't have 64-bit constants, so this constructs the address
+         * we need.
+         */
+        movq    $(UML_CONFIG_STUB_DATA >> 32), %rbx
+        salq    $32, %rbx
+        movq    $(UML_CONFIG_STUB_DATA & 0xffffffff), %rcx
+        or      %rcx, %rbx
+        movq    %rax, (%rbx)
+        int3