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
|
# mremap _____________________________________________________
# unsigned long sys_mremap(unsigned long addr,
# unsigned long old_len,
# unsigned long new_len,
# unsigned long flags,
# unsigned long new_addr)
#
@define _SYSCALL_MREMAP_NAME
%(
name = "mremap"
%)
@define _SYSCALL_MREMAP_ARGSTR
%(
argstr = sprintf("%p, %d, %d, %s, %p", old_address, old_size, new_size,
flags_str, new_address)
%)
@define _SYSCALL_MREMAP_REGARGS
%(
old_address = ulong_arg(1)
old_size = ulong_arg(2)
new_size = ulong_arg(3)
flags = ulong_arg(4)
flags_str = _mremap_flags(flags)
new_address = ulong_arg(5)
%)
probe syscall.mremap = dw_syscall.mremap !, nd_syscall.mremap ? {}
probe syscall.mremap.return = dw_syscall.mremap.return !, nd_syscall.mremap.return ? {}
# dw_mremap _____________________________________________________
probe dw_syscall.mremap = kernel.function("ia64_mremap").call ?,
kernel.function("sys_mremap").call ?
{
@_SYSCALL_MREMAP_NAME
old_address = $addr
old_size = $old_len
new_size = $new_len
flags = $flags
flags_str = _mremap_flags(flags)
new_address = $new_addr
@_SYSCALL_MREMAP_ARGSTR
}
probe dw_syscall.mremap.return = kernel.function("ia64_mremap").return ?,
kernel.function("sys_mremap").return ?
{
@_SYSCALL_MREMAP_NAME
@SYSC_RETVALSTR2($return)
}
# nd_mremap _____________________________________________________
probe nd_syscall.mremap = nd1_syscall.mremap!, nd2_syscall.mremap!, tp_syscall.mremap
{ }
probe nd1_syscall.mremap = kprobe.function("ia64_mremap") ?,
kprobe.function("sys_mremap") ?
{
@_SYSCALL_MREMAP_NAME
asmlinkage()
@_SYSCALL_MREMAP_REGARGS
@_SYSCALL_MREMAP_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.mremap = kprobe.function(@arch_syscall_prefix "sys_mremap") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_MREMAP_NAME
@_SYSCALL_MREMAP_REGARGS
@_SYSCALL_MREMAP_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.mremap = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_mremap"), @const("__NR_compat_mremap"))
@_SYSCALL_MREMAP_NAME
@_SYSCALL_MREMAP_REGARGS
@_SYSCALL_MREMAP_ARGSTR
}
probe nd_syscall.mremap.return = nd1_syscall.mremap.return!, nd2_syscall.mremap.return!, tp_syscall.mremap.return
{ }
probe nd1_syscall.mremap.return = kprobe.function("ia64_mremap").return ?,
kprobe.function("sys_mremap").return ?
{
@_SYSCALL_MREMAP_NAME
@SYSC_RETVALSTR2(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.mremap.return = kprobe.function(@arch_syscall_prefix "sys_mremap").return ?
{
@_SYSCALL_MREMAP_NAME
@SYSC_RETVALSTR2(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.mremap.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_mremap"), @const("__NR_compat_mremap"))
@_SYSCALL_MREMAP_NAME
@SYSC_RETVALSTR2($ret)
}
|
