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a71aa05e SR |
1 | #!/bin/sh |
2 | ||
3 | # Copyright © 2015 IBM Corporation | |
4 | ||
5 | # This program is free software; you can redistribute it and/or | |
6 | # modify it under the terms of the GNU General Public License | |
7 | # as published by the Free Software Foundation; either version | |
8 | # 2 of the License, or (at your option) any later version. | |
9 | ||
10 | # This script checks the relocations of a vmlinux for "suspicious" | |
11 | # relocations. | |
12 | ||
13 | # based on relocs_check.pl | |
14 | # Copyright © 2009 IBM Corporation | |
15 | ||
16 | if [ $# -lt 2 ]; then | |
17 | echo "$0 [path to objdump] [path to vmlinux]" 1>&2 | |
18 | exit 1 | |
19 | fi | |
20 | ||
21 | # Have Kbuild supply the path to objdump so we handle cross compilation. | |
22 | objdump="$1" | |
23 | vmlinux="$2" | |
24 | ||
25 | bad_relocs=$( | |
26 | "$objdump" -R "$vmlinux" | | |
27 | # Only look at relocation lines. | |
28 | grep -E '\<R_' | | |
29 | # These relocations are okay | |
30 | # On PPC64: | |
31 | # R_PPC64_RELATIVE, R_PPC64_NONE | |
32 | # R_PPC64_ADDR64 mach_<name> | |
33 | # On PPC: | |
34 | # R_PPC_RELATIVE, R_PPC_ADDR16_HI, | |
35 | # R_PPC_ADDR16_HA,R_PPC_ADDR16_LO, | |
36 | # R_PPC_NONE | |
37 | grep -F -w -v 'R_PPC64_RELATIVE | |
38 | R_PPC64_NONE | |
39 | R_PPC_ADDR16_LO | |
40 | R_PPC_ADDR16_HI | |
41 | R_PPC_ADDR16_HA | |
42 | R_PPC_RELATIVE | |
43 | R_PPC_NONE' | | |
44 | grep -E -v '\<R_PPC64_ADDR64[[:space:]]+mach_' | |
45 | ) | |
46 | ||
47 | if [ -z "$bad_relocs" ]; then | |
48 | exit 0 | |
49 | fi | |
50 | ||
51 | num_bad=$(echo "$bad_relocs" | wc -l) | |
52 | echo "WARNING: $num_bad bad relocations" | |
53 | echo "$bad_relocs" | |
54 | ||
55 | # If we see this type of relocation it's an idication that | |
56 | # we /may/ be using an old version of binutils. | |
57 | if echo "$bad_relocs" | grep -q -F -w R_PPC64_UADDR64; then | |
58 | echo "WARNING: You need at least binutils >= 2.19 to build a CONFIG_RELOCATABLE kernel" | |
59 | fi |