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1/* SPDX-License-Identifier: GPL-2.0 */
2#include "common.h"
3
4/*
5 * Checks that registers contain what we expect, ie. they were not clobbered by
6 * the syscall.
7 *
8 * r15: pattern to check registers against.
9 *
10 * At the end r3 == 0 if everything's OK.
11 */
12 nop # guaranteed to be illegal in reverse-endian
13 mr r9,r15
14 cmpd r9,r3 # check r3
15 bne 1f
16 addi r9,r15,4 # check r4
17 cmpd r9,r4
18 bne 1f
19 lis r9,0x00FF # check CR
20 ori r9,r9,0xF000
21 mfcr r10
22 and r10,r10,r9
23 cmpw r9,r10
24 addi r9,r15,34
25 bne 1f
26 addi r9,r15,32 # check LR
27 mflr r10
28 cmpd r9,r10
29 bne 1f
30 addi r9,r15,5 # check r5
31 cmpd r9,r5
32 bne 1f
33 addi r9,r15,6 # check r6
34 cmpd r9,r6
35 bne 1f
36 addi r9,r15,7 # check r7
37 cmpd r9,r7
38 bne 1f
39 addi r9,r15,8 # check r8
40 cmpd r9,r8
41 bne 1f
42 addi r9,r15,13 # check r13
43 cmpd r9,r13
44 bne 1f
45 addi r9,r15,14 # check r14
46 cmpd r9,r14
47 bne 1f
48 addi r9,r15,16 # check r16
49 cmpd r9,r16
50 bne 1f
51 addi r9,r15,17 # check r17
52 cmpd r9,r17
53 bne 1f
54 addi r9,r15,18 # check r18
55 cmpd r9,r18
56 bne 1f
57 addi r9,r15,19 # check r19
58 cmpd r9,r19
59 bne 1f
60 addi r9,r15,20 # check r20
61 cmpd r9,r20
62 bne 1f
63 addi r9,r15,21 # check r21
64 cmpd r9,r21
65 bne 1f
66 addi r9,r15,22 # check r22
67 cmpd r9,r22
68 bne 1f
69 addi r9,r15,23 # check r23
70 cmpd r9,r23
71 bne 1f
72 addi r9,r15,24 # check r24
73 cmpd r9,r24
74 bne 1f
75 addi r9,r15,25 # check r25
76 cmpd r9,r25
77 bne 1f
78 addi r9,r15,26 # check r26
79 cmpd r9,r26
80 bne 1f
81 addi r9,r15,27 # check r27
82 cmpd r9,r27
83 bne 1f
84 addi r9,r15,28 # check r28
85 cmpd r9,r28
86 bne 1f
87 addi r9,r15,29 # check r29
88 cmpd r9,r29
89 bne 1f
90 addi r9,r15,30 # check r30
91 cmpd r9,r30
92 bne 1f
93 addi r9,r15,31 # check r31
94 cmpd r9,r31
95 bne 1f
96 b 2f
971: mr r3, r9
98 li r0, __NR_exit
99 sc
1002: li r0, __NR_switch_endian
101 nop