auto import from //depot/cupcake/@135843
diff --git a/libc/arch-x86/syscalls/waitid.S b/libc/arch-x86/syscalls/waitid.S
new file mode 100644
index 0000000..9a5328b
--- /dev/null
+++ b/libc/arch-x86/syscalls/waitid.S
@@ -0,0 +1,35 @@
+/* autogenerated by gensyscalls.py */
+#include <sys/linux-syscalls.h>
+
+ .text
+ .type waitid, @function
+ .globl waitid
+ .align 4
+
+waitid:
+ pushl %ebx
+ pushl %ecx
+ pushl %edx
+ pushl %esi
+ pushl %edi
+ mov 24(%esp), %ebx
+ mov 28(%esp), %ecx
+ mov 32(%esp), %edx
+ mov 36(%esp), %esi
+ mov 40(%esp), %edi
+ movl $__NR_waitid, %eax
+ int $0x80
+ cmpl $-129, %eax
+ jb 1f
+ negl %eax
+ pushl %eax
+ call __set_errno
+ addl $4, %esp
+ orl $-1, %eax
+1:
+ popl %edi
+ popl %esi
+ popl %edx
+ popl %ecx
+ popl %ebx
+ ret