Last change
on this file since 688 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
|
File size:
918 bytes
|
Line | |
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1 | .macro FUNC_START name |
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2 | .text |
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3 | .globl \name |
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4 | .globl _\name |
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5 | \name: |
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6 | _\name: |
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7 | .endm |
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8 | |
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9 | FUNC_START _sbrk |
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10 | mov r4, r2 // save increment |
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11 | lrw r3, brkval |
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12 | ldw r2, (r3) // get next spot |
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13 | |
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14 | movi r5, 7 |
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15 | addi r2, 7 // round up to 8 bytes |
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16 | andn r2, r5 |
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17 | |
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18 | addu r4, r2 // save updated pointer |
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19 | stw r4, (r3) |
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20 | jmp r15 |
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21 | |
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22 | // brk() could go in here too... |
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23 | |
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24 | .data |
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25 | .import _end |
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26 | brkval: .long _end |
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27 | |
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28 | |
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29 | FUNC_START _exit |
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30 | mov r1, r1 // accomodate simulator glitch... |
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31 | .short 0x5000 |
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32 | br _exit // hard loop here |
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33 | |
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34 | // 0x5001 - printf |
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35 | // 0x5002 - scanf |
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36 | |
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37 | FUNC_START utime |
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38 | .short 0x5003 |
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39 | jmp r15 |
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40 | |
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41 | |
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42 | .macro stub name value |
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43 | FUNC_START \name |
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44 | movi r1, \value |
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45 | .short 0x50FF |
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46 | jmp r15 |
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47 | .endm |
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48 | |
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49 | stub _close 6 |
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50 | stub _lseek 19 |
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51 | stub _open 5 |
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52 | stub _read 3 |
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53 | stub _times 43 |
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54 | stub _unlink 10 |
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55 | stub _write 4 |
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56 | |
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57 | //stub access 33 |
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58 | //stub creat 8 |
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59 | //stub link 9 |
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60 | //stub time 13 |
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61 | |
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62 | //stub profil 98 // movi r6, 2 |
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63 | //stub lprofil 98 // movi r6, 4 |
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64 | |
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