1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
# faccessat __________________________________________________
# new function with 2.6.16
# long sys_faccessat(int dfd, const char __user *filename, int mode)
@define _SYSCALL_FACCESSAT_NAME
%(
name = "faccessat"
%)
@define _SYSCALL_FACCESSAT_ARGSTR
%(
argstr = sprintf("%s, %s, %s", dirfd_str, pathname, mode_str)
%)
@define _SYSCALL_FACCESSAT_REGARGS
%(
dirfd = int_arg(1)
dirfd_str = _dfd_str(dirfd)
pathname = user_string_quoted(pointer_arg(2))
mode = int_arg(3)
mode_str = _access_mode_str(mode)
%)
probe syscall.faccessat = dw_syscall.faccessat !, nd_syscall.faccessat ? {}
probe syscall.faccessat.return = dw_syscall.faccessat.return !, nd_syscall.faccessat.return ? {}
# dw_faccessat _____________________________________________________
probe dw_syscall.faccessat = kernel.function("sys_faccessat").call ?
{
@__syscall_compat_gate(@const("__NR_faccessat"),
@const("__NR_compat_faccessat"))
@_SYSCALL_FACCESSAT_NAME
dirfd = __int32($dfd)
dirfd_str = _dfd_str(__int32($dfd))
pathname = user_string_quoted($filename)
mode = __int32($mode)
mode_str = _access_mode_str(__int32($mode))
@_SYSCALL_FACCESSAT_ARGSTR
}
probe dw_syscall.faccessat.return = kernel.function("sys_faccessat").return ?
{
@__syscall_compat_gate(@const("__NR_faccessat"),
@const("__NR_compat_faccessat"))
@_SYSCALL_FACCESSAT_NAME
@SYSC_RETVALSTR($return)
}
# nd_faccessat _____________________________________________________
probe nd_syscall.faccessat = nd1_syscall.faccessat!, nd2_syscall.faccessat!, tp_syscall.faccessat
{ }
probe nd1_syscall.faccessat = kprobe.function("sys_faccessat") ?
{
@__syscall_compat_gate(@const("__NR_faccessat"),
@const("__NR_compat_faccessat"))
@_SYSCALL_FACCESSAT_NAME
asmlinkage()
@_SYSCALL_FACCESSAT_REGARGS
@_SYSCALL_FACCESSAT_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.faccessat = kprobe.function(@arch_syscall_prefix "sys_faccessat") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_FACCESSAT_NAME
@_SYSCALL_FACCESSAT_REGARGS
@_SYSCALL_FACCESSAT_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.faccessat = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_faccessat"),
@const("__NR_compat_faccessat"))
@_SYSCALL_FACCESSAT_NAME
@_SYSCALL_FACCESSAT_REGARGS
@_SYSCALL_FACCESSAT_ARGSTR
}
probe nd_syscall.faccessat.return = nd1_syscall.faccessat.return!, nd2_syscall.faccessat.return!, tp_syscall.faccessat.return
{ }
probe nd1_syscall.faccessat.return = kprobe.function("sys_faccessat").return ?
{
@__syscall_compat_gate(@const("__NR_faccessat"),
@const("__NR_compat_faccessat"))
@_SYSCALL_FACCESSAT_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.faccessat.return = kprobe.function(@arch_syscall_prefix "sys_faccessat").return ?
{
@_SYSCALL_FACCESSAT_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.faccessat.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_faccessat"),
@const("__NR_compat_faccessat"))
@_SYSCALL_FACCESSAT_NAME
@SYSC_RETVALSTR($ret)
}
|
