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
37#if defined(SYSLIBC_SCCS) && !defined(lint)
38 .asciz "@(#)sbrk.s 5.1 (Berkeley) 4/23/90"
39#endif /* SYSLIBC_SCCS and not lint */
40#include <machine/asm.h>
| 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
37#if defined(SYSLIBC_SCCS) && !defined(lint)
38 .asciz "@(#)sbrk.s 5.1 (Berkeley) 4/23/90"
39#endif /* SYSLIBC_SCCS and not lint */
40#include <machine/asm.h>
|
41__FBSDID("$FreeBSD: head/lib/libc/amd64/sys/sbrk.S 114313 2003-04-30 18:16:33Z peter $");
| 41__FBSDID("$FreeBSD: head/lib/libc/amd64/sys/sbrk.S 115279 2003-05-24 17:35:23Z peter $");
|
42
43#include "SYS.h"
44
45 .globl CNAME(_end)
46 .globl HIDENAME(minbrk)
47 .globl HIDENAME(curbrk)
48
49 .data
50HIDENAME(minbrk): .quad CNAME(_end)
51HIDENAME(curbrk): .quad CNAME(_end)
52 .text
53
54ENTRY(sbrk)
55 pushq %rdi
56 movq %rdi,%rcx
| 42
43#include "SYS.h"
44
45 .globl CNAME(_end)
46 .globl HIDENAME(minbrk)
47 .globl HIDENAME(curbrk)
48
49 .data
50HIDENAME(minbrk): .quad CNAME(_end)
51HIDENAME(curbrk): .quad CNAME(_end)
52 .text
53
54ENTRY(sbrk)
55 pushq %rdi
56 movq %rdi,%rcx
|
57 movq PIC_GOT(HIDENAME(curbrk)),%rax
| 57#ifdef PIC
58 movq PIC_GOT(HIDENAME(curbrk)),%rdx
59 movq (%rdx),%rax
60#else
61 movq HIDENAME(curbrk)(%rip),%rax
62#endif
|
58 testq %rcx,%rcx
59 jz back
60 addq %rax,%rdi
61 mov $SYS_break,%eax
62 KERNCALL
63 jb err
| 63 testq %rcx,%rcx
64 jz back
65 addq %rax,%rdi
66 mov $SYS_break,%eax
67 KERNCALL
68 jb err
|
64 movq PIC_GOT(HIDENAME(curbrk)),%rax
| 69#ifdef PIC
70 movq PIC_GOT(HIDENAME(curbrk)),%rdx
71 movq (%rdx),%rax
72#else
73 movq HIDENAME(curbrk)(%rip),%rax
74#endif
|
65 movq 0(%rsp), %rcx
| 75 movq 0(%rsp), %rcx
|
66 addq %rcx,PIC_GOT(HIDENAME(curbrk))
| 76#ifdef PIC
77 addq %rcx,(%rdx)
78#else
79 addq %rcx,HIDENAME(curbrk)(%rip)
80#endif
|
67back:
68 addq $8, %rsp
69 ret
70err:
71 addq $8, %rsp
| 81back:
82 addq $8, %rsp
83 ret
84err:
85 addq $8, %rsp
|
72 jmp PIC_PLT(HIDENAME(cerror))
| 86#ifdef PIC
87 movq PIC_GOT(HIDENAME(cerror)),%rdx
88 jmp *%rdx
89#else
90 jmp HIDENAME(cerror)
91#endif
|
| |