1 files changed, 21 insertions, 0 deletions

diff --git a/arch/um/sys-x86_64/stub.S b/arch/um/sys-x86_64/stub.S
index 31c14925716b..957f2eff32ca 100644
--- a/arch/um/sys-x86_64/stub.S
+++ b/arch/um/sys-x86_64/stub.S
@@ -13,3 +13,24 @@ syscall_stub:
         or      %rcx, %rbx
         movq    %rax, (%rbx)
         int3
+
+        .globl batch_syscall_stub
+batch_syscall_stub:
+        movq    $(UML_CONFIG_STUB_DATA >> 32), %rbx
+        salq    $32, %rbx
+        movq    $(UML_CONFIG_STUB_DATA & 0xffffffff), %rcx
+        or      %rcx, %rbx
+        movq    %rbx, %rsp
+again:  pop     %rax
+        cmpq    $0, %rax
+jz      done
+        pop     %rdi
+        pop     %rsi
+        pop     %rdx
+        pop     %r10
+        pop     %r8
+        pop     %r9
+        syscall
+        mov     %rax, (%rbx)
+        jmp     again
+done:   int3