1 files changed, 19 insertions, 3 deletions

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 31b46128a63d..70641aff0c25 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -845,9 +845,25 @@ ENTRY(\label)
 END(\label)
         .endm
 
-        PTREGSCALL stub_clone, sys_clone, %r8
-        PTREGSCALL stub_fork, sys_fork, %rdi
-        PTREGSCALL stub_vfork, sys_vfork, %rdi
+        .macro FORK_LIKE func
+ENTRY(stub_\func)
+        CFI_STARTPROC
+        popq    %r11                    /* save return address */
+        PARTIAL_FRAME 0
+        SAVE_REST
+        pushq   %r11                    /* put it back on stack */
+        FIXUP_TOP_OF_STACK %r11, 8
+        DEFAULT_FRAME 0 8               /* offset 8: return address */
+        call sys_\func
+        RESTORE_TOP_OF_STACK %r11, 8
+        ret $REST_SKIP          /* pop extended registers */
+        CFI_ENDPROC
+END(stub_\func)
+        .endm
+
+        FORK_LIKE  clone
+        FORK_LIKE  fork
+        FORK_LIKE  vfork
         PTREGSCALL stub_sigaltstack, sys_sigaltstack, %rdx
         PTREGSCALL stub_iopl, sys_iopl, %rsi