source:
tags/minix3.1.2a-orig/enter2.asm
Last change on this file was 2, checked in by , 13 years ago | |
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File size: 451 bytes |
Line | |
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1 | section .text |
2 | global enter_section |
3 | extern printf |
4 | |
5 | enter_section: |
6 | enter 0, 0 ; 0 bytes of local stack space |
7 | mov ebx,[ebp+8] ; first parameter to function |
8 | |
9 | |
10 | spin: mov ecx, 0 |
11 | lock bts dword [ebx], 0 |
12 | jc save |
13 | print: push busy |
14 | call printf |
15 | |
16 | cmp ecx, 1 |
17 | je spin |
18 | |
19 | save: mov ecx, 1 |
20 | jmp print |
21 | |
22 | leave ; mov esp,ebp / pop ebp |
23 | ret |
24 | |
25 | section .rodata |
26 | busy: db "Busy waiting!",10,0 |
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