projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 1f673d7a SL |
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 | ||
| 7 | #ifdef SYSLIBC_SCCS | |
| 8 | _sccsid:.asciz "@(#)brk.s 5.1 (Berkeley) %G%" | |
| 9 | #endif SYSLIBC_SCCS | |
| 10 | ||
| 11 | #include "SYS.h" | |
| 12 | ||
| 13 | #define SYS_brk 17 | |
| 14 | ||
| 15 | .globl curbrk | |
| 16 | .globl minbrk | |
| 17 | ||
| 18 | ENTRY(brk) | |
| 19 | cmpl 4(fp),minbrk | |
| 20 | bgeq ok | |
| 21 | movl minbrk,4(fp) | |
| 22 | ok: | |
| 23 | kcall $SYS_brk | |
| 24 | jcs err | |
| 25 | movl 4(fp),curbrk | |
| 26 | clrl r0 | |
| 27 | ret | |
| 28 | err: | |
| 29 | jmp cerror |