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
111
112
113
114
115
116
117
118
119
120
121
122
123
|
# arch_prctl _________________________________________________
# long sys_arch_prctl(int code, unsigned long addr)
# SYSCALL_DEFINE2(arch_prctl, int, option, unsigned long, arg2)
# COMPAT_SYSCALL_DEFINE2(arch_prctl, int, option, unsigned long, arg2)
#
# NOTE: x86_64 only.
#
@define _SYSCALL_ARCH_PRCTL_NAME
%(
name = "arch_prctl"
%)
@define _SYSCALL_ARCH_PRCTL_ARGSTR
%(
argstr = sprintf("%s, %u", code_str, addr)
%)
@define _SYSCALL_ARCH_PRCTL_REGARGS
%(
code = int_arg(1)
code_str = _stp_arch_prctl_func_str(code)
addr = ulong_arg(2)
%)
@define _SYSCALL_ARCH_PRCTL_REGARGS_STORE
%(
if (@probewrite(code))
set_int_arg(1, code)
if (@probewrite(addr))
set_ulong_arg(2, addr)
%)
probe syscall.arch_prctl = dw_syscall.arch_prctl !,
nd_syscall.arch_prctl {}
probe syscall.arch_prctl.return = dw_syscall.arch_prctl.return !,
nd_syscall.arch_prctl.return {}
# dw_arch_prctl _____________________________________________________
probe dw_syscall.arch_prctl = kernel.function("sys_arch_prctl").call,
kernel.function("compat_sys_arch_prctl").call ?
{
@_SYSCALL_ARCH_PRCTL_NAME
code = __int32(@choose_defined($code, $option))
code_str = _stp_arch_prctl_func_str(code)
addr = __ulong(@choose_defined($addr, $arg2))
@_SYSCALL_ARCH_PRCTL_ARGSTR
}
probe dw_syscall.arch_prctl.return = kernel.function("sys_arch_prctl").return,
kernel.function("compat_sys_arch_prctl").return ?
{
@_SYSCALL_ARCH_PRCTL_NAME
@SYSC_RETVALSTR($return)
}
# nd_arch_prctl _____________________________________________________
probe nd_syscall.arch_prctl = nd1_syscall.arch_prctl!, nd2_syscall.arch_prctl!, tp_syscall.arch_prctl
{ }
probe nd1_syscall.arch_prctl = kprobe.function("sys_arch_prctl"),
kprobe.function("compat_sys_arch_prctl") ?
{
@_SYSCALL_ARCH_PRCTL_NAME
// NB: no asmlinkage()
@_SYSCALL_ARCH_PRCTL_REGARGS
@_SYSCALL_ARCH_PRCTL_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.arch_prctl = kprobe.function(@arch_syscall_prefix "sys_arch_prctl"),
kprobe.function(@arch_syscall_prefix "compat_sys_arch_prctl") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_ARCH_PRCTL_NAME
@_SYSCALL_ARCH_PRCTL_REGARGS
@_SYSCALL_ARCH_PRCTL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_ARCH_PRCTL_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.arch_prctl = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_arch_prctl"), @const("__NR_ia32_arch_prctl"))
@_SYSCALL_ARCH_PRCTL_NAME
@_SYSCALL_ARCH_PRCTL_REGARGS
@_SYSCALL_ARCH_PRCTL_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_ARCH_PRCTL_REGARGS_STORE %)
}
probe nd_syscall.arch_prctl.return = nd1_syscall.arch_prctl.return!, nd2_syscall.arch_prctl.return!, tp_syscall.arch_prctl.return
{ }
probe nd1_syscall.arch_prctl.return = kprobe.function("sys_arch_prctl").return,
kprobe.function("compat_sys_arch_prctl").return ?
{
@_SYSCALL_ARCH_PRCTL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.arch_prctl.return = kprobe.function(@arch_syscall_prefix "sys_arch_prctl").return,
kprobe.function(@arch_syscall_prefix "compat_sys_arch_prctl").return ?
{
@_SYSCALL_ARCH_PRCTL_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.arch_prctl.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_arch_prctl"), @const("__NR_ia32_arch_prctl"))
@_SYSCALL_ARCH_PRCTL_NAME
@SYSC_RETVALSTR($ret)
}
|
