projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| cd2c584c DF |
1 | /* |
| 2 | * Copyright (c) 1983 Regents of the University of California. | |
| b094f5ae KB |
3 | * All rights reserved. |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms are permitted | |
| 50c7758a KB |
6 | * provided that the above copyright notice and this paragraph are |
| 7 | * duplicated in all such forms and that any documentation, | |
| 8 | * advertising materials, and other materials related to such | |
| 9 | * distribution and use acknowledge that the software was developed | |
| 10 | * by the University of California, Berkeley. The name of the | |
| 11 | * University may not be used to endorse or promote products derived | |
| 12 | * from this software without specific prior written permission. | |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
| 15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| cd2c584c DF |
16 | */ |
| 17 | ||
| b094f5ae | 18 | #if defined(SYSLIBC_SCCS) && !defined(lint) |
| ca67e7b4 | 19 | .asciz "@(#)brk.s 5.5 (Berkeley) 6/27/88" |
| b094f5ae | 20 | #endif /* SYSLIBC_SCCS and not lint */ |
| e2a0e449 KM |
21 | |
| 22 | #include "SYS.h" | |
| 23 | ||
| 24 | #define SYS_brk 17 | |
| 25 | ||
| 26 | .globl curbrk | |
| dc09cd7b | 27 | .globl minbrk |
| b1ae656c KL |
28 | ENTRY(_brk) |
| 29 | jbr ok | |
| e2a0e449 | 30 | |
| dc09cd7b KM |
31 | ENTRY(brk) |
| 32 | cmpl 4(ap),minbrk | |
| 33 | bgeq ok | |
| 34 | movl minbrk,4(ap) | |
| 35 | ok: | |
| 36 | chmk $SYS_brk | |
| 37 | jcs err | |
| e2a0e449 KM |
38 | movl 4(ap),curbrk |
| 39 | clrl r0 | |
| 40 | ret | |
| dc09cd7b KM |
41 | err: |
| 42 | jmp cerror |