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Last change
on this file since 1030 was
520,
checked in by bouyer, 11 years ago
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Re-add the tests; reverting previous which was done at the wrong level (sorry)
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File size:
867 bytes
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| 1 | /* |
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| 2 | * Check that the exeption vector is called on exception. |
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| 3 | * We use a load to an unaligned address to trigger the exception. |
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| 4 | */ |
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| 5 | #include <registers.h> |
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| 6 | #include <misc.h> |
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| 7 | |
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| 8 | .text |
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| 9 | .globl _start |
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| 10 | _start: |
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| 11 | .set noreorder |
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| 12 | la k0, TTY_BASE |
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| 13 | la k1, EXIT_BASE |
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| 14 | |
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| 15 | PRINT(startstr) |
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| 16 | |
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| 17 | li a0, 1 |
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| 18 | lw a0, 0(a0) /* fault */ |
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| 19 | |
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| 20 | /* we shouldn't get there */ |
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| 21 | EXIT(1) |
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| 22 | |
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| 23 | .globl excep |
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| 24 | excep: |
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| 25 | .set noreorder |
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| 26 | PRINT(statusstr) |
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| 27 | mfc0 a0, COP0_STATUS |
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| 28 | PRINTX |
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| 29 | |
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| 30 | PRINT(causestr) |
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| 31 | mfc0 a0, COP0_CAUSE |
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| 32 | PRINTX |
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| 33 | |
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| 34 | PRINT(pcstr) |
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| 35 | mfc0 a0, COP0_EXPC |
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| 36 | PRINTX |
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| 37 | |
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| 38 | PRINT(badvastr) |
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| 39 | mfc0 a0, COP_0_BADVADDR |
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| 40 | PRINTX |
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| 41 | |
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| 42 | li a0, '\n' |
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| 43 | sb a0, 0(k0) |
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| 44 | |
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| 45 | EXIT(0) |
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| 46 | |
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| 47 | .rodata: |
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| 48 | statusstr: .ascii "status \0" |
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| 49 | causestr: .ascii " cause \0" |
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| 50 | pcstr: .ascii " pc \0" |
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| 51 | badvastr: .ascii " badva \0" |
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| 52 | startstr: .ascii "start\n\0" |
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| 53 | |
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| 54 | .org EXCEP_ADDRESS - BOOT_ADDRESS |
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| 55 | .globl evect |
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| 56 | evect: |
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| 57 | j excep |
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| 58 | nop |
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| 59 | .data |
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| 60 | myvar: .word 0 |
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