4cd968ef42
This adds a test of the switch_endian() syscall we added in the previous commit. We test it by calling the endian switch syscall, and then executing some code in the other endian to check everything went as expected. That code checks registers we expect to be maintained are. If the endian switch failed to happen that code sequence will be illegal and cause the test to abort. We then switch back to the original endian, do the same checks and finally write a success message and exit(0). Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
101 lines
1.9 KiB
ArmAsm
101 lines
1.9 KiB
ArmAsm
#include "common.h"
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/*
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* Checks that registers contain what we expect, ie. they were not clobbered by
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* the syscall.
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*
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* r15: pattern to check registers against.
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*
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* At the end r3 == 0 if everything's OK.
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*/
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nop # guaranteed to be illegal in reverse-endian
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mr r9,r15
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cmpd r9,r3 # check r3
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bne 1f
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addi r9,r15,4 # check r4
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cmpd r9,r4
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bne 1f
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lis r9,0x00FF # check CR
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ori r9,r9,0xF000
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mfcr r10
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and r10,r10,r9
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cmpw r9,r10
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addi r9,r15,34
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bne 1f
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addi r9,r15,32 # check LR
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mflr r10
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cmpd r9,r10
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bne 1f
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addi r9,r15,5 # check r5
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cmpd r9,r5
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bne 1f
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addi r9,r15,6 # check r6
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cmpd r9,r6
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bne 1f
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addi r9,r15,7 # check r7
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cmpd r9,r7
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bne 1f
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addi r9,r15,8 # check r8
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cmpd r9,r8
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bne 1f
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addi r9,r15,13 # check r13
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cmpd r9,r13
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bne 1f
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addi r9,r15,14 # check r14
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cmpd r9,r14
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bne 1f
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addi r9,r15,16 # check r16
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cmpd r9,r16
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bne 1f
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addi r9,r15,17 # check r17
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cmpd r9,r17
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bne 1f
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addi r9,r15,18 # check r18
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cmpd r9,r18
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bne 1f
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addi r9,r15,19 # check r19
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cmpd r9,r19
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bne 1f
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addi r9,r15,20 # check r20
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cmpd r9,r20
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bne 1f
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addi r9,r15,21 # check r21
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cmpd r9,r21
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bne 1f
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addi r9,r15,22 # check r22
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cmpd r9,r22
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bne 1f
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addi r9,r15,23 # check r23
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cmpd r9,r23
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bne 1f
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addi r9,r15,24 # check r24
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cmpd r9,r24
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bne 1f
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addi r9,r15,25 # check r25
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cmpd r9,r25
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bne 1f
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addi r9,r15,26 # check r26
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cmpd r9,r26
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bne 1f
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addi r9,r15,27 # check r27
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cmpd r9,r27
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bne 1f
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addi r9,r15,28 # check r28
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cmpd r9,r28
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bne 1f
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addi r9,r15,29 # check r29
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cmpd r9,r29
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bne 1f
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addi r9,r15,30 # check r30
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cmpd r9,r30
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bne 1f
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addi r9,r15,31 # check r31
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cmpd r9,r31
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bne 1f
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b 2f
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1: mr r3, r9
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li r0, __NR_exit
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sc
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2: li r0, __NR_switch_endian
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nop
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