r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000040)='/proc/sysvipc/shm\x00', 0x0, 0x0)
preadv(r0, &(0x7f00000019c0)=[{&(0x7f0000001800)=""/209, 0xd1}], 0x1, 0xaa, 0x0)