|
Last change
on this file since 856 was
520,
checked in by bouyer, 11 years ago
|
|
Re-add the tests; reverting previous which was done at the wrong level (sorry)
|
|
File size:
1.3 KB
|
| Line | |
|---|
| 1 | /* |
|---|
| 2 | * syscall test: check that a syscall generates an exception, and we can |
|---|
| 3 | * return |
|---|
| 4 | */ |
|---|
| 5 | #include <registers.h> |
|---|
| 6 | #include <misc.h> |
|---|
| 7 | |
|---|
| 8 | .text |
|---|
| 9 | .globl _start |
|---|
| 10 | _start: |
|---|
| 11 | .set noreorder |
|---|
| 12 | la k0, TTY_BASE |
|---|
| 13 | la k1, EXIT_BASE |
|---|
| 14 | la sp, 0x00400000 - 16 |
|---|
| 15 | |
|---|
| 16 | PRINT(startstr) |
|---|
| 17 | |
|---|
| 18 | /* reset cop0 status (keep BEV) */ |
|---|
| 19 | lui a0, 0x0040; |
|---|
| 20 | mtc0 a0, COP0_STATUS |
|---|
| 21 | /* switch to user mode */ |
|---|
| 22 | mfc0 a0, COP0_STATUS |
|---|
| 23 | ori a0, 0x10 |
|---|
| 24 | mtc0 a0, COP0_STATUS |
|---|
| 25 | nop |
|---|
| 26 | nop |
|---|
| 27 | nop |
|---|
| 28 | PRINT(usrstr) |
|---|
| 29 | syscall |
|---|
| 30 | bne a3, zero, exit |
|---|
| 31 | nop |
|---|
| 32 | /* we should not get there, a3 is not 0 */ |
|---|
| 33 | EXIT(2) |
|---|
| 34 | exit: |
|---|
| 35 | move a0, v0 |
|---|
| 36 | PRINTX |
|---|
| 37 | PUTCHAR(' ') |
|---|
| 38 | move a0, v1 |
|---|
| 39 | PRINTX |
|---|
| 40 | PUTCHAR('\n') |
|---|
| 41 | /* we should get there */ |
|---|
| 42 | EXIT(0) |
|---|
| 43 | |
|---|
| 44 | .globl excep |
|---|
| 45 | excep: |
|---|
| 46 | .set noreorder |
|---|
| 47 | PRINT(statusstr) |
|---|
| 48 | mfc0 a0, COP0_STATUS |
|---|
| 49 | PRINTX |
|---|
| 50 | |
|---|
| 51 | PRINT(causestr) |
|---|
| 52 | mfc0 a0, COP0_CAUSE |
|---|
| 53 | PRINTX |
|---|
| 54 | |
|---|
| 55 | PRINT(pcstr) |
|---|
| 56 | mfc0 a0, COP0_EXPC |
|---|
| 57 | PRINTX |
|---|
| 58 | |
|---|
| 59 | PRINT(badvastr) |
|---|
| 60 | mfc0 a0, COP_0_BADVADDR |
|---|
| 61 | PRINTX |
|---|
| 62 | PUTCHAR('\n') |
|---|
| 63 | mfc0 a0, COP0_EXPC |
|---|
| 64 | addiu a0, a0, 4 |
|---|
| 65 | mtc0 a0, COP0_EXPC |
|---|
| 66 | li v0, MAGIC1 |
|---|
| 67 | li v1, MAGIC2 |
|---|
| 68 | li a3, 1 |
|---|
| 69 | eret |
|---|
| 70 | nop |
|---|
| 71 | |
|---|
| 72 | #we should not end there |
|---|
| 73 | EXIT(1) |
|---|
| 74 | |
|---|
| 75 | .rodata: |
|---|
| 76 | statusstr: .ascii "status \0" |
|---|
| 77 | causestr: .ascii " cause \0" |
|---|
| 78 | pcstr: .ascii " pc \0" |
|---|
| 79 | badvastr: .ascii " badva \0" |
|---|
| 80 | startstr: .ascii "start\n\0" |
|---|
| 81 | usrstr: .ascii "usrmode\n\0" |
|---|
| 82 | |
|---|
| 83 | .org EXCEP_ADDRESS - BOOT_ADDRESS |
|---|
| 84 | .globl evect |
|---|
| 85 | evect: |
|---|
| 86 | j excep |
|---|
| 87 | nop |
|---|
| 88 | .data |
|---|
| 89 | .word MAGIC1 |
|---|
| 90 | testval: |
|---|
| 91 | .word MAGIC2 |
|---|
Note: See
TracBrowser
for help on using the repository browser.
