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: brk.S,v 1.1 1994/08/05 01:18:39 wollman Exp $
| 36 * $Id: brk.S,v 1.2 1995/01/23 01:29:39 davidg 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 "$Id$"
| 41 .asciz "$Id: brk.S,v 1.2 1995/01/23 01:29:39 davidg 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
47
48 .globl curbrk
49 .globl minbrk
| 46 .globl HIDENAME(curbrk)
47 .globl HIDENAME(minbrk)
|
50ENTRY(_brk)
51 jmp ok
52
53ENTRY(brk)
54#ifdef PIC
55 movl 4(%esp),%eax
56 PIC_PROLOGUE
| 48ENTRY(_brk)
49 jmp ok
50
51ENTRY(brk)
52#ifdef PIC
53 movl 4(%esp),%eax
54 PIC_PROLOGUE
|
57 movl PIC_GOT(curbrk),%edx # set up GOT addressing
58 movl PIC_GOT(minbrk),%ecx #
| 55 movl PIC_GOT(HIDENAME(curbrk)),%edx # set up GOT addressing
56 movl PIC_GOT(HIDENAME(minbrk)),%ecx #
|
59 cmpl %eax,(%ecx)
60 PIC_EPILOGUE
61 jl ok
62 movl (%ecx),%eax
63 movl %eax,4(%esp)
64ok:
| 57 cmpl %eax,(%ecx)
58 PIC_EPILOGUE
59 jl ok
60 movl (%ecx),%eax
61 movl %eax,4(%esp)
62ok:
|
65 lea SYS_brk,%eax
66 LCALL(7,0)
| 63 lea SYS_break,%eax
64 KERNCALL
|
67 jb err
68 movl 4(%esp),%eax
69 movl %eax,(%edx)
70 movl $0,%eax
71 ret
72err:
| 65 jb err
66 movl 4(%esp),%eax
67 movl %eax,(%edx)
68 movl $0,%eax
69 ret
70err:
|
73 jmp PIC_PLT(cerror)
| 71 PIC_PROLOGUE
72 jmp PIC_PLT(HIDENAME(cerror))
|
74
75#else
76
77 movl 4(%esp),%eax
| 73
74#else
75
76 movl 4(%esp),%eax
|
78 cmpl %eax,minbrk
| 77 cmpl %eax,HIDENAME(minbrk)
|
79 jl ok
| 78 jl ok
|
80 movl minbrk,%eax
| 79 movl HIDENAME(minbrk),%eax
|
81 movl %eax,4(%esp)
82ok:
| 80 movl %eax,4(%esp)
81ok:
|
83 lea SYS_brk,%eax
84 LCALL(7,0)
| 82 lea SYS_break,%eax
83 KERNCALL
|
85 jb err
86 movl 4(%esp),%eax
| 84 jb err
85 movl 4(%esp),%eax
|
87 movl %eax,curbrk
| 86 movl %eax,HIDENAME(curbrk)
|
88 movl $0,%eax
89 ret
90err:
| 87 movl $0,%eax
88 ret
89err:
|
91 jmp cerror
| 90 jmp HIDENAME(cerror)
|
92#endif
| 91#endif
|