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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 | ||
9 | BEGIN { result = sanity = 0; default_exec = -1 } | |
10 | ||
11 | /^execstack-no$/ { default_exec = 0; next } | |
12 | /^execstack-yes$/ { default_exec = 1; next } | |
13 | ||
14 | function check_one(name) { | |
15 | if (default_exec == -1) { | |
16 | print "*** missing execstack-default file?"; | |
17 | result = 2; | |
18 | } | |
19 | ||
20 | if (!sanity) { | |
21 | print name ": *** input did not look like readelf -l output"; | |
22 | result = 2; | |
23 | } else if (stack_line) { | |
24 | if (stack_line ~ /^.*RW .*$/) { | |
25 | print name ": OK"; | |
26 | } else if (stack_line ~ /^.*E.*$/) { | |
27 | print name ": *** executable stack signaled"; | |
28 | result = result ? result : 1; | |
29 | } | |
30 | } else if (default_exec) { | |
31 | print name ": *** no PT_GNU_STACK entry"; | |
32 | result = result ? result : 1; | |
33 | } else { | |
34 | print name ": no PT_GNU_STACK but default is OK"; | |
35 | } | |
36 | ||
37 | sanity = 0; | |
38 | } | |
39 | ||
40 | FILENAME != lastfile { | |
41 | if (lastfile) | |
42 | check_one(lastfile); | |
43 | lastfile = FILENAME; | |
44 | } | |
45 | ||
46 | $1 == "Type" && $7 == "Flg" { sanity = 1; stack_line = "" } | |
47 | $1 == "GNU_STACK" { stack_line = $0 } | |
48 | ||
49 | END { | |
50 | check_one(lastfile); | |
51 | exit(result); | |
52 | } |