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check-execstack: Permit sysdeps to xfail some libs

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* scripts/check-execstack.awk: Consider `xfail' variable containing a
	list
	of libraries whose stack executability is expected.
	* elf/Makefile ($(objpfx)check-execstack.out): Pass
	$(check-execstack-xfail) to check-execstack.awk through `xfail'
	variable.
	* sysdeps/mach/hurd/i386/Makefile (check-execstack-xfail): Set to ld.so
	libc.so libpthread.so.
This commit is contained in:
Samuel Thibault
2018-07-20 02:49:44 +02:00
parent 8ba1520e8c
commit 2d5c41ded9
4 changed files with 36 additions and 6 deletions
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27
scripts/check-execstack.awk
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@ -6,7 +6,12 @@
# It fails (1) if any did indicate executable stack.
# It fails (2) if the input did not take the expected form.
BEGIN { result = sanity = 0; default_exec = -1 }
BEGIN {
result = sanity = 0; default_exec = -1;
split(xfail, xfails, " ");
for (x in xfails)
expected_fails[xfails[x] ".phdr"] = 1;
}
/^execstack-no$/ { default_exec = 0; next }
/^execstack-yes$/ { default_exec = 1; next }
@ -17,6 +22,10 @@ function check_one(name) {
result = 2;
}
n = split(name, parts, "/");
basename = parts[n];
expected_fail = basename in expected_fails;
if (!sanity) {
print name ": *** input did not look like readelf -l output";
result = 2;
@ -24,12 +33,20 @@ function check_one(name) {
if (stack_line ~ /^.*RW .*$/) {
print name ": OK";
} else if (stack_line ~ /^.*E.*$/) {
print name ": *** executable stack signaled";
result = result ? result : 1;
if (expected_fail) {
print name ": *** executable stack signaled, expected";
} else {
print name ": *** executable stack signaled";
result = result ? result : 1;
}
}
} else if (default_exec) {
print name ": *** no PT_GNU_STACK entry";
result = result ? result : 1;
if (expected_fail) {
print name ": *** no PT_GNU_STACK entry, expected";
} else {
print name ": *** no PT_GNU_STACK entry";
result = result ? result : 1;
}
} else {
print name ": no PT_GNU_STACK but default is OK";
}