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 97 1: mr r3, r9 98 li r0, __NR_exit 99 sc 100 2: li r0, __NR_switch_endian 101 nop 102