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
|
# exit _______________________________________________________
# long sys_exit(int error_code)
#
# sys_exit() never returns, and is blocklisted for return probes,
# so no alias here. See bz6588.
# NB: the explicit .call ensures that alias suffixes can't infer .return
@define _SYSCALL_EXIT_NAME
%(
name = "exit"
%)
@define _SYSCALL_EXIT_ARGSTR
%(
argstr = sprint(status)
%)
@define _SYSCALL_EXIT_REGARGS
%(
status = int_arg(1)
%)
@define _SYSCALL_EXIT_REGARGS_STORE
%(
if (@probewrite(status))
set_int_arg(1, status)
%)
probe syscall.exit = dw_syscall.exit !, nd_syscall.exit {}
probe syscall.exit.return = never
{
@_SYSCALL_EXIT_NAME
@SYSC_RETVALSTR(0)
}
probe nd_syscall.exit.return = never
{
@_SYSCALL_EXIT_NAME
@SYSC_RETVALSTR(0)
}
probe dw_syscall.exit.return = never
{
@_SYSCALL_EXIT_NAME
@SYSC_RETVALSTR(0)
}
# dw_exit _____________________________________________________
probe dw_syscall.exit = kernel.function("sys_exit").call
{
@_SYSCALL_EXIT_NAME
status = __int32($error_code)
@_SYSCALL_EXIT_ARGSTR
}
# nd_exit _____________________________________________________
probe nd_syscall.exit = nd1_syscall.exit!, nd2_syscall.exit!, tp_syscall.exit
{ }
probe nd1_syscall.exit = kprobe.function("sys_exit").call
{
@_SYSCALL_EXIT_NAME
asmlinkage()
@_SYSCALL_EXIT_REGARGS
@_SYSCALL_EXIT_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.exit = kprobe.function(@arch_syscall_prefix "sys_exit")
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_EXIT_NAME
@_SYSCALL_EXIT_REGARGS
@_SYSCALL_EXIT_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_EXIT_REGARGS_STORE %)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.exit = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_exit"), @const("__NR_compat_exit"))
@_SYSCALL_EXIT_NAME
@_SYSCALL_EXIT_REGARGS
@_SYSCALL_EXIT_ARGSTR
},
{
%( @_IS_SREG_KERNEL %? @_SYSCALL_EXIT_REGARGS_STORE %)
}
|
