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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _MCSAFE_TEST_H_
3#define _MCSAFE_TEST_H_
4
5#ifndef __ASSEMBLY__
6#ifdef CONFIG_MCSAFE_TEST
7extern unsigned long mcsafe_test_src;
8extern unsigned long mcsafe_test_dst;
9
10static inline void mcsafe_inject_src(void *addr)
11{
12 if (addr)
13 mcsafe_test_src = (unsigned long) addr;
14 else
15 mcsafe_test_src = ~0UL;
16}
17
18static inline void mcsafe_inject_dst(void *addr)
19{
20 if (addr)
21 mcsafe_test_dst = (unsigned long) addr;
22 else
23 mcsafe_test_dst = ~0UL;
24}
25#else /* CONFIG_MCSAFE_TEST */
26static inline void mcsafe_inject_src(void *addr)
27{
28}
29
30static inline void mcsafe_inject_dst(void *addr)
31{
32}
33#endif /* CONFIG_MCSAFE_TEST */
34
35#else /* __ASSEMBLY__ */
36#include <asm/export.h>
37
38#ifdef CONFIG_MCSAFE_TEST
39.macro MCSAFE_TEST_CTL
40 .pushsection .data
41 .align 8
42 .globl mcsafe_test_src
43 mcsafe_test_src:
44 .quad 0
45 EXPORT_SYMBOL_GPL(mcsafe_test_src)
46 .globl mcsafe_test_dst
47 mcsafe_test_dst:
48 .quad 0
49 EXPORT_SYMBOL_GPL(mcsafe_test_dst)
50 .popsection
51.endm
52
53.macro MCSAFE_TEST_SRC reg count target
54 leaq \count(\reg), %r9
55 cmp mcsafe_test_src, %r9
56 ja \target
57.endm
58
59.macro MCSAFE_TEST_DST reg count target
60 leaq \count(\reg), %r9
61 cmp mcsafe_test_dst, %r9
62 ja \target
63.endm
64#else
65.macro MCSAFE_TEST_CTL
66.endm
67
68.macro MCSAFE_TEST_SRC reg count target
69.endm
70
71.macro MCSAFE_TEST_DST reg count target
72.endm
73#endif /* CONFIG_MCSAFE_TEST */
74#endif /* __ASSEMBLY__ */
75#endif /* _MCSAFE_TEST_H_ */