tools/testing/selftests/powerpc/switch_endian/check.S

   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