Last change
on this file since 445 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 | |
---|
[444] | 1 | .macro FUNC_START name |
---|
| 2 | .text |
---|
| 3 | .globl \name |
---|
| 4 | .globl _\name |
---|
| 5 | \name: |
---|
| 6 | _\name: |
---|
| 7 | .endm |
---|
| 8 | |
---|
| 9 | FUNC_START _sbrk |
---|
| 10 | mov r4, r2 // save increment |
---|
| 11 | lrw r3, brkval |
---|
| 12 | ldw r2, (r3) // get next spot |
---|
| 13 | |
---|
| 14 | movi r5, 7 |
---|
| 15 | addi r2, 7 // round up to 8 bytes |
---|
| 16 | andn r2, r5 |
---|
| 17 | |
---|
| 18 | addu r4, r2 // save updated pointer |
---|
| 19 | stw r4, (r3) |
---|
| 20 | jmp r15 |
---|
| 21 | |
---|
| 22 | // brk() could go in here too... |
---|
| 23 | |
---|
| 24 | .data |
---|
| 25 | .import _end |
---|
| 26 | brkval: .long _end |
---|
| 27 | |
---|
| 28 | |
---|
| 29 | FUNC_START _exit |
---|
| 30 | mov r1, r1 // accomodate simulator glitch... |
---|
| 31 | .short 0x5000 |
---|
| 32 | br _exit // hard loop here |
---|
| 33 | |
---|
| 34 | // 0x5001 - printf |
---|
| 35 | // 0x5002 - scanf |
---|
| 36 | |
---|
| 37 | FUNC_START utime |
---|
| 38 | .short 0x5003 |
---|
| 39 | jmp r15 |
---|
| 40 | |
---|
| 41 | |
---|
| 42 | .macro stub name value |
---|
| 43 | FUNC_START \name |
---|
| 44 | movi r1, \value |
---|
| 45 | .short 0x50FF |
---|
| 46 | jmp r15 |
---|
| 47 | .endm |
---|
| 48 | |
---|
| 49 | stub _close 6 |
---|
| 50 | stub _lseek 19 |
---|
| 51 | stub _open 5 |
---|
| 52 | stub _read 3 |
---|
| 53 | stub _times 43 |
---|
| 54 | stub _unlink 10 |
---|
| 55 | stub _write 4 |
---|
| 56 | |
---|
| 57 | //stub access 33 |
---|
| 58 | //stub creat 8 |
---|
| 59 | //stub link 9 |
---|
| 60 | //stub time 13 |
---|
| 61 | |
---|
| 62 | //stub profil 98 // movi r6, 2 |
---|
| 63 | //stub lprofil 98 // movi r6, 4 |
---|
| 64 | |
---|
Note: See
TracBrowser
for help on using the repository browser.