anchor.diff: -#syscall (v5.9.0-rc1 2020-08-17),x86,x86_64,x32,arm,aarch64,mips,mips64,mips64n32,parisc,parisc64,ppc,ppc64,riscv64,s390,s390x,sh
  +#syscall (v5.12.0-rc7 2021-04-17),x86,x86_64,x32,arm,aarch64,mips,mips64,mips64n32,parisc,parisc64,ppc,ppc64,riscv64,s390,s390x,sh
   accept,PNR,43,43,285,202,168,42,42,35,35,330,330,202,PNR,PNR,344
   accept4,364,288,288,366,242,334,293,297,320,320,344,344,242,364,364,358
   access,33,21,21,33,PNR,33,20,20,33,33,33,33,PNR,33,33,33
  
positive.code: preadv,333,295,534,361,69,330,289,293,315,315,320,320,69,328,328,333
  preadv2,378,327,546,392,286,361,321,325,347,347,380,380,286,376,376,381
  prlimit64,340,302,302,369,261,338,297,302,321,321,325,325,261,334,334,339
  process_vm_readv,347,310,539,376,270,345,304,309,330,330,351,351,270,340,340,365
  process_vm_writev,348,311,540,377,271,346,305,310,331,331,352,352,271,341,341,366
  prof,44,PNR,PNR,PNR,PNR,44,PNR,PNR,PNR,PNR,44,44,PNR,PNR,PNR,PNR
  
negative.code: epoll_ctl,255,233,233,251,21,249,208,208,225,225,237,237,21,250,250,255
  epoll_ctl_old,PNR,214,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR
  epoll_pwait,319,281,281,346,22,313,272,276,297,297,303,303,22,312,312,319
  epoll_pwait2,441,441,441,441,441,441,441,441,441,441,441,441,441,441,441,441
  epoll_wait,256,232,232,252,PNR,250,209,209,226,226,238,238,PNR,251,251,256
  epoll_wait_old,PNR,215,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR,PNR
  eventfd,323,284,284,351,PNR,319,278,282,304,304,307,307,PNR,318,318,323
  