12
Raw pointer value SHOULD be printed with %p.
12
Raw pointer value SHOULD be printed with %p. The kernel supports
13
the following extended format specifiers for pointer types:
15
Symbols/Function Pointers:
17
%pF versatile_init+0x0/0x110
19
%pS versatile_init+0x0/0x110
21
%pB prev_fn_of_versatile_init+0x88/0x88
23
For printing symbols and function pointers. The 'S' and 's' specifiers
24
result in the symbol name with ('S') or without ('s') offsets. Where
25
this is used on a kernel without KALLSYMS - the symbol address is
28
The 'B' specifier results in the symbol name with offsets and should be
29
used when printing stack backtraces. The specifier takes into
30
consideration the effect of compiler optimisations which may occur
31
when tail-call's are used and marked with the noreturn GCC attribute.
33
On ia64, ppc64 and parisc64 architectures function pointers are
34
actually function descriptors which must first be resolved. The 'F' and
35
'f' specifiers perform this resolution and then provide the same
36
functionality as the 'S' and 's' specifiers.
40
%pK 0x01234567 or 0x0123456789abcdef
42
For printing kernel pointers which should be hidden from unprivileged
43
users. The behaviour of %pK depends on the kptr_restrict sysctl - see
44
Documentation/sysctl/kernel.txt for more details.
48
%pr [mem 0x60000000-0x6fffffff flags 0x2200] or
49
[mem 0x0000000060000000-0x000000006fffffff flags 0x2200]
50
%pR [mem 0x60000000-0x6fffffff pref] or
51
[mem 0x0000000060000000-0x000000006fffffff pref]
53
For printing struct resources. The 'R' and 'r' specifiers result in a
54
printed resource with ('R') or without ('r') a decoded flags member.
59
%pMF 00-01-02-03-04-05
62
For printing 6-byte MAC/FDDI addresses in hex notation. The 'M' and 'm'
63
specifiers result in a printed address with ('M') or without ('m') byte
64
separators. The default byte separator is the colon (':').
66
Where FDDI addresses are concerned the 'F' specifier can be used after
67
the 'M' specifier to use dash ('-') separators instead of the default
76
For printing IPv4 dot-separated decimal addresses. The 'I4' and 'i4'
77
specifiers result in a printed address with ('i4') or without ('I4')
80
The additional 'h', 'n', 'b', and 'l' specifiers are used to specify
81
host, network, big or little endian order addresses respectively. Where
82
no specifier is provided the default network/big endian order is used.
86
%pI6 0001:0002:0003:0004:0005:0006:0007:0008
87
%pi6 00010002000300040005000600070008
90
For printing IPv6 network-order 16-bit hex addresses. The 'I6' and 'i6'
91
specifiers result in a printed address with ('I6') or without ('i6')
92
colon-separators. Leading zeros are always used.
94
The additional 'c' specifier can be used with the 'I' specifier to
95
print a compressed IPv6 address as described by
96
http://tools.ietf.org/html/rfc5952
100
%pUb 00010203-0405-0607-0809-0a0b0c0d0e0f
101
%pUB 00010203-0405-0607-0809-0A0B0C0D0E0F
102
%pUl 03020100-0504-0706-0809-0a0b0c0e0e0f
103
%pUL 03020100-0504-0706-0809-0A0B0C0E0E0F
105
For printing 16-byte UUID/GUIDs addresses. The additional 'l', 'L',
106
'b' and 'B' specifiers are used to specify a little endian order in
107
lower ('l') or upper case ('L') hex characters - and big endian order
108
in lower ('b') or upper case ('B') hex characters.
110
Where no additional specifiers are used the default little endian
111
order with lower case hex characters will be printed.
117
For printing struct va_format structures. These contain a format string
118
and va_list as follows:
125
Do not use this feature without some mechanism to verify the
126
correctness of the format string and va_list arguments.
14
128
u64 SHOULD be printed with %llu/%llx, (unsigned long long):