projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| cd2c584c DF |
1 | /* |
| 2 | * Copyright (c) 1983 Regents of the University of California. | |
| 3 | * All rights reserved. The Berkeley software License Agreement | |
| 4 | * specifies the terms and conditions for redistribution. | |
| 5 | */ | |
| 6 | ||
| 42217b17 | 7 | #ifdef SYSLIBC_SCCS |
| 95f51977 | 8 | _sccsid:.asciz "@(#)brk.c 5.3 (Berkeley) 3/9/86" |
| 42217b17 | 9 | #endif SYSLIBC_SCCS |
| e2a0e449 KM |
10 | |
| 11 | #include "SYS.h" | |
| 12 | ||
| 13 | #define SYS_brk 17 | |
| 14 | ||
| 15 | .globl curbrk | |
| dc09cd7b | 16 | .globl minbrk |
| b1ae656c KL |
17 | ENTRY(_brk) |
| 18 | jbr ok | |
| e2a0e449 | 19 | |
| dc09cd7b KM |
20 | ENTRY(brk) |
| 21 | cmpl 4(ap),minbrk | |
| 22 | bgeq ok | |
| 23 | movl minbrk,4(ap) | |
| 24 | ok: | |
| 25 | chmk $SYS_brk | |
| 26 | jcs err | |
| e2a0e449 KM |
27 | movl 4(ap),curbrk |
| 28 | clrl r0 | |
| 29 | ret | |
| dc09cd7b KM |
30 | err: |
| 31 | jmp cerror |