pipe(&(0x7f00000000c0)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
vmsplice(r0, &(0x7f0000001540)=[{&(0x7f00000001c0)="f1", 0x1}], 0x1, 0x0)
vmsplice(r0, &(0x7f0000000400)=[{&(0x7f0000000000)='y', 0x1}], 0x1, 0x0)