arm64/gcs/gcs-locking.c

5  * Tests for GCS mode locking.  These tests rely on both having GCS
7  * test in a fork()ed process which will have it's own mode.
41 /* No mode bits are rejected for locking */
56 	unsigned long mode;
61 	.mode = PR_SHADOW_STACK_ENABLE,
66 	.mode = PR_SHADOW_STACK_ENABLE | PR_SHADOW_STACK_WRITE,
71 	.mode = PR_SHADOW_STACK_ENABLE | PR_SHADOW_STACK_PUSH,
76 	.mode = PR_SHADOW_STACK_ENABLE | PR_SHADOW_STACK_WRITE |
88 /* We can set the mode at all */
94 			  variant->mode);
103 	unsigned long mode;
107 			  variant->mode);
110 	ret = prctl(PR_GET_SHADOW_STACK_STATUS, &mode, 0, 0, 0);
112 	ASSERT_EQ(mode, variant->mode);
114 	ret = prctl(PR_LOCK_SHADOW_STACK_STATUS, variant->mode, 0, 0, 0);
126 	unsigned long mode;
129 	ret = prctl(PR_LOCK_SHADOW_STACK_STATUS, variant->mode, 0, 0, 0);
133 			  variant->mode);
136 	ret = prctl(PR_GET_SHADOW_STACK_STATUS, &mode, 0, 0, 0);
138 	ASSERT_EQ(mode, 0);
146 	unsigned long mode;
150 			  variant->mode);
153 	ret = prctl(PR_GET_SHADOW_STACK_STATUS, &mode, 0, 0, 0);
155 	ASSERT_EQ(mode, variant->mode);
157 	ret = prctl(PR_LOCK_SHADOW_STACK_STATUS, variant->mode, 0, 0, 0);
164 	ret = prctl(PR_GET_SHADOW_STACK_STATUS, &mode, 0, 0, 0);
166 	ASSERT_EQ(mode, PR_SHADOW_STACK_ALL_MODES);
170 			  variant->mode);
173 	ret = prctl(PR_GET_SHADOW_STACK_STATUS, &mode, 0, 0, 0);
175 	ASSERT_EQ(mode, variant->mode);
182 	unsigned long mode;
188 	ret = prctl(PR_GET_SHADOW_STACK_STATUS, &mode, 0, 0, 0);
194 	if (mode & PR_SHADOW_STACK_ENABLE) {