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-rw-r--r--tools/testing/selftests/powerpc/switch_endian/check.S101
1 files changed, 101 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/switch_endian/check.S b/tools/testing/selftests/powerpc/switch_endian/check.S
new file mode 100644
index 000000000..927a5c675
--- /dev/null
+++ b/tools/testing/selftests/powerpc/switch_endian/check.S
@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include "common.h"
+
+/*
+ * Checks that registers contain what we expect, ie. they were not clobbered by
+ * the syscall.
+ *
+ * r15: pattern to check registers against.
+ *
+ * At the end r3 == 0 if everything's OK.
+ */
+ nop # guaranteed to be illegal in reverse-endian
+ mr r9,r15
+ cmpd r9,r3 # check r3
+ bne 1f
+ addi r9,r15,4 # check r4
+ cmpd r9,r4
+ bne 1f
+ lis r9,0x00FF # check CR
+ ori r9,r9,0xF000
+ mfcr r10
+ and r10,r10,r9
+ cmpw r9,r10
+ addi r9,r15,34
+ bne 1f
+ addi r9,r15,32 # check LR
+ mflr r10
+ cmpd r9,r10
+ bne 1f
+ addi r9,r15,5 # check r5
+ cmpd r9,r5
+ bne 1f
+ addi r9,r15,6 # check r6
+ cmpd r9,r6
+ bne 1f
+ addi r9,r15,7 # check r7
+ cmpd r9,r7
+ bne 1f
+ addi r9,r15,8 # check r8
+ cmpd r9,r8
+ bne 1f
+ addi r9,r15,13 # check r13
+ cmpd r9,r13
+ bne 1f
+ addi r9,r15,14 # check r14
+ cmpd r9,r14
+ bne 1f
+ addi r9,r15,16 # check r16
+ cmpd r9,r16
+ bne 1f
+ addi r9,r15,17 # check r17
+ cmpd r9,r17
+ bne 1f
+ addi r9,r15,18 # check r18
+ cmpd r9,r18
+ bne 1f
+ addi r9,r15,19 # check r19
+ cmpd r9,r19
+ bne 1f
+ addi r9,r15,20 # check r20
+ cmpd r9,r20
+ bne 1f
+ addi r9,r15,21 # check r21
+ cmpd r9,r21
+ bne 1f
+ addi r9,r15,22 # check r22
+ cmpd r9,r22
+ bne 1f
+ addi r9,r15,23 # check r23
+ cmpd r9,r23
+ bne 1f
+ addi r9,r15,24 # check r24
+ cmpd r9,r24
+ bne 1f
+ addi r9,r15,25 # check r25
+ cmpd r9,r25
+ bne 1f
+ addi r9,r15,26 # check r26
+ cmpd r9,r26
+ bne 1f
+ addi r9,r15,27 # check r27
+ cmpd r9,r27
+ bne 1f
+ addi r9,r15,28 # check r28
+ cmpd r9,r28
+ bne 1f
+ addi r9,r15,29 # check r29
+ cmpd r9,r29
+ bne 1f
+ addi r9,r15,30 # check r30
+ cmpd r9,r30
+ bne 1f
+ addi r9,r15,31 # check r31
+ cmpd r9,r31
+ bne 1f
+ b 2f
+1: mr r3, r9
+ li r0, __NR_exit
+ sc
+2: li r0, __NR_switch_endian
+ nop