root# truss kldload mac_portacl
mmap(0x0,3608,(0x3)PROT_READ|PROT_WRITE,(0x1000)MAP_ANON,-1,0x0) = 671531008 (0x2806c000)
munmap(0x2806c000,0xe18)                         = 0 (0x0)
__sysctl(0xbfbfeac8,0x2,0x28068998,0xbfbfeac4,0x0,0x0) = 0 (0x0)
mmap(0x0,32768,(0x3)PROT_READ|PROT_WRITE,(0x1002)MAP_ANON|MAP_PRIVATE,-1,0x0) = 671531008 (0x2806c000)
issetugid()                                      = 0 (0x0)
open("/etc/libmap.conf",0x0,0666)                ERR#2 'No such file or directory'
open("/var/run/ld-elf.so.hints",0x0,00)          = 3 (0x3)
read(0x3,0xbfbfea90,0x80)                        = 128 (0x80)
lseek(3,0x80,SEEK_SET)                           = 128 (0x80)
read(0x3,0x2806e100,0x81)                        = 129 (0x81)
close(3)                                         = 0 (0x0)
access("/lib/libc.so.6",0)                       = 0 (0x0)
open("/lib/libc.so.6",0x0,00)                    = 3 (0x3)
fstat(3,0xbfbfead0)                              = 0 (0x0)
read(0x3,0x280678e0,0x1000)                      = 4096 (0x1000)
mmap(0x0,884736,(0x5)PROT_READ|PROT_EXEC,(0x20002)MAP_NOCORE|MAP_PRIVATE,3,0x0) = 671563776 (0x28074000)
mprotect(0x28133000,4096,(0x7)PROT_READ|PROT_WRITE|PROT_EXEC) = 0 (0x0)
mprotect(0x28133000,4096,(0x5)PROT_READ|PROT_EXEC) = 0 (0x0)
mmap(0x28134000,20480,(0x3)PROT_READ|PROT_WRITE,(0x12)MAP_FIXED|MAP_PRIVATE,3,0xc0000) = 672350208 (0x28134000)
mmap(0x28139000,77824,(0x3)PROT_READ|PROT_WRITE,(0x1012)MAP_ANON|MAP_FIXED|MAP_PRIVATE,-1,0x0) = 672370688 (0x28139000)
close(3)                                         = 0 (0x0)
sysarch(0xa,0xbfbfeb40)                          = 0 (0x0)
mmap(0x0,184,(0x3)PROT_READ|PROT_WRITE,(0x1000)MAP_ANON,-1,0x0) = 672448512 (0x2814c000)
munmap(0x2814c000,0xb8)                          = 0 (0x0)
mprotect(0x28074000,786432,(0x7)PROT_READ|PROT_WRITE|PROT_EXEC) = 0 (0x0)
mmap(0x0,22208,(0x3)PROT_READ|PROT_WRITE,(0x1000)MAP_ANON,-1,0x0) = 672448512 (0x2814c000)
munmap(0x2814c000,0x56c0)                        = 0 (0x0)
mprotect(0x28074000,786432,(0x5)PROT_READ|PROT_EXEC) = 0 (0x0)
sigprocmask(0x1,0x28067820,0xbfbfeb10)           = 0 (0x0)
sigprocmask(0x3,0x28067830,0x0)                  = 0 (0x0)
kldload("mac_portacl")                           ERR#2 'No such file or directory'
kldload: write(2,0xbfbfe660,9)                           = 9 (0x9)
can't load mac_portaclwrite(2,0xbfbfe680,22)                             = 22 (0x16)
: write(2,0x2812d168,2)                          = 2 (0x2)
No such file or directory
write(2,0xbfbfe660,26)                           = 26 (0x1a)
exit(0x1)
process exit, rval = 256