Last change
on this file since 486 was
444,
checked in by satin@…, 6 years ago
|
add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
|
File size:
918 bytes
|
Rev | Line | |
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[444] | 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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