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82397ed6 RM |
1 | # This awk script expects to get command-line files that are each |
2 | # the output of 'readelf -l' on a single shared object. | |
3 | # But the first file should contain just "execstack-no" or "execstack-yes", | |
4 | # indicating what the default is in the absence of PT_GNU_STACK. | |
5 | # It exits successfully (0) if none indicated executable stack. | |
6 | # It fails (1) if any did indicate executable stack. | |
7 | # It fails (2) if the input did not take the expected form. | |
8 | ||
2d5c41de ST |
9 | BEGIN { |
10 | result = sanity = 0; default_exec = -1; | |
11 | split(xfail, xfails, " "); | |
12 | for (x in xfails) | |
13 | expected_fails[xfails[x] ".phdr"] = 1; | |
14 | } | |
82397ed6 RM |
15 | |
16 | /^execstack-no$/ { default_exec = 0; next } | |
17 | /^execstack-yes$/ { default_exec = 1; next } | |
18 | ||
19 | function check_one(name) { | |
20 | if (default_exec == -1) { | |
21 | print "*** missing execstack-default file?"; | |
22 | result = 2; | |
23 | } | |
24 | ||
2d5c41de ST |
25 | n = split(name, parts, "/"); |
26 | basename = parts[n]; | |
27 | expected_fail = basename in expected_fails; | |
28 | ||
82397ed6 RM |
29 | if (!sanity) { |
30 | print name ": *** input did not look like readelf -l output"; | |
31 | result = 2; | |
32 | } else if (stack_line) { | |
33 | if (stack_line ~ /^.*RW .*$/) { | |
34 | print name ": OK"; | |
35 | } else if (stack_line ~ /^.*E.*$/) { | |
2d5c41de ST |
36 | if (expected_fail) { |
37 | print name ": *** executable stack signaled, expected"; | |
38 | } else { | |
39 | print name ": *** executable stack signaled"; | |
40 | result = result ? result : 1; | |
41 | } | |
82397ed6 RM |
42 | } |
43 | } else if (default_exec) { | |
2d5c41de ST |
44 | if (expected_fail) { |
45 | print name ": *** no PT_GNU_STACK entry, expected"; | |
46 | } else { | |
47 | print name ": *** no PT_GNU_STACK entry"; | |
48 | result = result ? result : 1; | |
49 | } | |
82397ed6 RM |
50 | } else { |
51 | print name ": no PT_GNU_STACK but default is OK"; | |
52 | } | |
53 | ||
54 | sanity = 0; | |
55 | } | |
56 | ||
57 | FILENAME != lastfile { | |
58 | if (lastfile) | |
59 | check_one(lastfile); | |
60 | lastfile = FILENAME; | |
61 | } | |
62 | ||
63 | $1 == "Type" && $7 == "Flg" { sanity = 1; stack_line = "" } | |
64 | $1 == "GNU_STACK" { stack_line = $0 } | |
65 | ||
66 | END { | |
67 | check_one(lastfile); | |
68 | exit(result); | |
69 | } |