Android 2.6.29を介してカーネルのシステムコールフックを実装しましたLKM module。システムコール用に1つのAndroidアプリを追跡しています。しかし、興味深いことに、システムコールのリストを取得するたびに異なる結果が返されます。
コードセクションで太字のテキストを作成できないため、違いがどこから始まるかを示すために**を付けました。
例えば、
ファーストラン：
our_sys_gettid ---> uid = 10028
our_sys_open ---> uid = 10028 with filename= /dev/cpuctl//tasks, flags= 131073, mode=0
our_sys_write ---> uid = 10028 with fd= 30, buf = 230 and count=3
our_sys_close ---> uid = 10028 with fd= 30
our_sys_setpriority ---> uid = 10028 with which= 0, who=230 and niceval=0
our_sys_futex ---> uid = 10028 with uadd=������, op=1, val=1, utime=<NULL>, uaddr2=������ and val3=
**our_sys_gettid ---> uid = 10028
our_sys_open ---> uid = 10028 with filename= /dev/cpuctl//tasks, flags= 131073, mode=0
our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =
our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3196467192
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3196467192 **
our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =
our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3196466496
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3196466496
our_sys_dup ---> uid = 10028 with fildes=32
our_sys_close ---> uid = 10028 with fd= 32
.....................
2回目の実行：
our_sys_gettid ---> uid = 10028
our_sys_open ---> uid = 10028 with filename= /dev/cpuctl//tasks, flags= 131073, mode=0
our_sys_write ---> uid = 10028 with fd= 30, buf = 228 and count=3
our_sys_close ---> uid = 10028 with fd= 30
our_sys_setpriority ---> uid = 10028 with which= 0, who=228 and niceval=0
our_sys_futex ---> uid = 10028 with uadd=������, op=1, val=1, utime=<NULL>, uaddr2=������ and val3=
**our_sys_gettid ---> uid = 10028
our_sys_open ---> uid = 10028 with filename= /dev/cpuctl//tasks, flags= 131073, mode=0
our_sys_write ---> uid = 10028 with fd= 30, buf = 228 and count=3
our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =
our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198662648
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198662648
our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =
our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198661952**
our_sys_close ---> uid = 10028 with fd= 30
our_sys_setpriority ---> uid = 10028 with which= 0, who=228 and niceval=0
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=1181359656
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198661952
our_sys_dup ---> uid = 10028 with fildes=32
our_sys_close ---> uid = 10028 with fd= 32
....................
3回目の実行：
our_sys_gettid ---> uid = 10028
our_sys_open ---> uid = 10028 with filename= /dev/cpuctl//tasks, flags= 131073, mode=0
our_sys_write ---> uid = 10028 with fd= 31, buf = 228 and count=3
our_sys_close ---> uid = 10028 with fd= 31
our_sys_setpriority ---> uid = 10028 with which= 0, who=228 and niceval=0
our_sys_futex ---> uid = 10028 with uadd=������, op=1, val=1, utime=<NULL>, uaddr2=������ and val3=X{�D
**our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =
our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198035960
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198035960
our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =
our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =
our_sys_munmap ---> uid = 10028 with addr=1183178752 and len=770048
our_sys_close ---> uid = 10028 with fd= 32**
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198035264
our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198035264
our_sys_dup ---> uid = 10028 with fildes=31
our_sys_close ---> uid = 10028 with fd= 31
........................
毎回異なる結果が得られる理由はありますか？
システムコールを追跡するためのより良いツールは他にありますか？などと聞いたのですがstrace/ptrace、auditdAndroidで使えるかどうかわかりません。