1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 *
| 1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 *
|
36 * $Id: sbrk.S,v 1.2 1995/01/23 01:30:04 davidg Exp $
| 36 * $Id: sbrk.S,v 1.3 1995/10/04 15:58:57 phk Exp $
|
37 */ 38 39#if defined(SYSLIBC_RCS) && !defined(lint) 40 .text
| 37 */ 38 39#if defined(SYSLIBC_RCS) && !defined(lint) 40 .text
|
41 .asciz "$Id: sbrk.S,v 1.2 1995/01/23 01:30:04 davidg Exp $"
| 41 .asciz "$Id: sbrk.S,v 1.3 1995/10/04 15:58:57 phk Exp $"
|
42#endif /* SYSLIBC_RCS and not lint */ 43 44#include "SYS.h" 45
| 42#endif /* SYSLIBC_RCS and not lint */ 43 44#include "SYS.h" 45
|
46#define SYS_brk 17
| 46 .globl CNAME(end) 47 .globl HIDENAME(minbrk) 48 .globl HIDENAME(curbrk)
|
47
| 49
|
48 .globl _end 49 .globl minbrk 50 .globl curbrk 51
| |
52 .data
| 50 .data
|
53minbrk: .long _end 54curbrk: .long _end
| 51HIDENAME(minbrk): .long CNAME(end) 52HIDENAME(curbrk): .long CNAME(end)
|
55 .text 56 57ENTRY(sbrk) 58#ifdef PIC 59 movl 4(%esp),%ecx 60 PIC_PROLOGUE
| 53 .text 54 55ENTRY(sbrk) 56#ifdef PIC 57 movl 4(%esp),%ecx 58 PIC_PROLOGUE
|
61 movl PIC_GOT(curbrk),%edx
| 59 movl PIC_GOT(HIDENAME(curbrk)),%edx
|
62 movl (%edx),%eax 63 PIC_EPILOGUE 64 testl %ecx,%ecx 65 jz back 66 addl %eax,4(%esp)
| 60 movl (%edx),%eax 61 PIC_EPILOGUE 62 testl %ecx,%ecx 63 jz back 64 addl %eax,4(%esp)
|
67 lea SYS_brk,%eax 68 LCALL(7,0)
| 65 lea SYS_break,%eax 66 KERNCALL
|
69 jb err 70 PIC_PROLOGUE
| 67 jb err 68 PIC_PROLOGUE
|
71 movl PIC_GOT(curbrk),%edx
| 69 movl PIC_GOT(HIDENAME(curbrk)),%edx
|
72 movl (%edx),%eax 73 addl %ecx,(%edx) 74 PIC_EPILOGUE 75back: 76 ret 77err:
| 70 movl (%edx),%eax 71 addl %ecx,(%edx) 72 PIC_EPILOGUE 73back: 74 ret 75err:
|
78 jmp PIC_PLT(cerror)
| 76 PIC_PROLOGUE 77 jmp PIC_PLT(HIDENAME(cerror))
|
79 80#else /* !PIC */ 81 82 movl 4(%esp),%ecx
| 78 79#else /* !PIC */ 80 81 movl 4(%esp),%ecx
|
83 movl curbrk,%eax
| 82 movl HIDENAME(curbrk),%eax
|
84 testl %ecx,%ecx 85 jz back 86 addl %eax,4(%esp)
| 83 testl %ecx,%ecx 84 jz back 85 addl %eax,4(%esp)
|
87 lea SYS_brk,%eax 88 LCALL(7,0)
| 86 lea SYS_break,%eax 87 KERNCALL
|
89 jb err
| 88 jb err
|
90 movl curbrk,%eax 91 addl %ecx,curbrk
| 89 movl HIDENAME(curbrk),%eax 90 addl %ecx,HIDENAME(curbrk)
|
92back: 93 ret 94err:
| 91back: 92 ret 93err:
|
95 jmp cerror
| 94 jmp HIDENAME(cerror)
|
96#endif /* PIC */
| 95#endif /* PIC */
|