d4846c33eb
Add a test that locklessly changes and exercises page protection bits from various threads. This helps catch race conditions in the VMA handling. Acked-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Message-Id: <20221223120252.513319-1-iii@linux.ibm.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
26 lines
616 B
C
26 lines
616 B
C
/*
|
|
* No-op functions that can be safely copied.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
#ifndef NOP_FUNC_H
|
|
#define NOP_FUNC_H
|
|
|
|
static const char nop_func[] = {
|
|
#if defined(__aarch64__)
|
|
0xc0, 0x03, 0x5f, 0xd6, /* ret */
|
|
#elif defined(__alpha__)
|
|
0x01, 0x80, 0xFA, 0x6B, /* ret */
|
|
#elif defined(__arm__)
|
|
0x1e, 0xff, 0x2f, 0xe1, /* bx lr */
|
|
#elif defined(__riscv)
|
|
0x67, 0x80, 0x00, 0x00, /* ret */
|
|
#elif defined(__s390__)
|
|
0x07, 0xfe, /* br %r14 */
|
|
#elif defined(__i386__) || defined(__x86_64__)
|
|
0xc3, /* ret */
|
|
#endif
|
|
};
|
|
|
|
#endif
|