linux - tools/objtool/tests/generic/test-static-call-module-key.sh

36 lines · 1.2 KiB

1	#!/bin/bash
2	# SPDX-License-Identifier: GPL-2.0
3	#
4	# As for static branches, a static call key owned by a module must be rejected
5	# while a vmlinux-owned one is accepted.
6
7	. "$(dirname "$0")/../lib.sh"
8
9	setup
10	build_pair static_call.c
11
12	has_input_section orig.o .static_call_sites \|\|
13	probe_skip "fixture produced no .static_call_sites on this arch"
14
15	run_diff
16	assert_patched target
17
18	# The accepted half has to show the entry was carried, not just that the
19	# function was: dropping the section silently would leave the patched call
20	# unregistered, and "target was cloned" cannot tell the two apart.
21	assert_section .static_call_sites
22	assert_reloc_sym .static_call_sites target
23
24	rm -f "$workdir/out.o"
25	build_pair static_call.c -DMODNAME='"klp_testmod"'
26	run_diff 255
27
28	diff_log \| grep -q 'unsupported static call key __SCK__klp_test_call' \|\|
29	fail "expected rejection, got: $(diff_log \| tail -1)"
30
31	# A rejection has to leave nothing behind. out.o was removed above, so
32	# anything here was written by the run which was supposed to refuse.
33	[ -e "$workdir/out.o" ] &&
34	fail "output object produced for a rejected input"
35
36	pass "module-owned static call key rejected, vmlinux-owned accepted"