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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if defined(SYSLIBC_SCCS) && !defined(lint)
34 .asciz "@(#)brk.s 5.2 (Berkeley) 12/17/90"
35#endif /* SYSLIBC_SCCS and not lint */
36#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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if defined(SYSLIBC_SCCS) && !defined(lint)
34 .asciz "@(#)brk.s 5.2 (Berkeley) 12/17/90"
35#endif /* SYSLIBC_SCCS and not lint */
36#include <machine/asm.h>
|
46
47ENTRY(brk)
48 pushq %rdi
49 movq %rdi,%rax
50#ifdef PIC
51 movq PIC_GOT(HIDENAME(minbrk)),%rdx
52 cmpq %rax,(%rdx)
53#else
54 cmpq %rax,HIDENAME(minbrk)(%rip)
55#endif
56 jbe ok
57#ifdef PIC
58 movq (%rdx),%rdi
59#else
60 movq HIDENAME(minbrk)(%rip),%rdi
61#endif
62ok:
63 movq $SYS_break,%rax
64 KERNCALL
65 jb err
66 movq 0(%rsp),%rax
67#ifdef PIC
68 movq PIC_GOT(HIDENAME(curbrk)),%rdx
69 movq %rax,(%rdx)
70#else
71 movq %rax,HIDENAME(curbrk)(%rip)
72#endif
73 movq $0,%rax
74 popq %rdi
75 ret
76err:
77 addq $8, %rsp
78#ifdef PIC
79 movq PIC_GOT(HIDENAME(cerror)),%rdx
80 jmp *%rdx
81#else
82 jmp HIDENAME(cerror)
83#endif
| 47
48ENTRY(brk)
49 pushq %rdi
50 movq %rdi,%rax
51#ifdef PIC
52 movq PIC_GOT(HIDENAME(minbrk)),%rdx
53 cmpq %rax,(%rdx)
54#else
55 cmpq %rax,HIDENAME(minbrk)(%rip)
56#endif
57 jbe ok
58#ifdef PIC
59 movq (%rdx),%rdi
60#else
61 movq HIDENAME(minbrk)(%rip),%rdi
62#endif
63ok:
64 movq $SYS_break,%rax
65 KERNCALL
66 jb err
67 movq 0(%rsp),%rax
68#ifdef PIC
69 movq PIC_GOT(HIDENAME(curbrk)),%rdx
70 movq %rax,(%rdx)
71#else
72 movq %rax,HIDENAME(curbrk)(%rip)
73#endif
74 movq $0,%rax
75 popq %rdi
76 ret
77err:
78 addq $8, %rsp
79#ifdef PIC
80 movq PIC_GOT(HIDENAME(cerror)),%rdx
81 jmp *%rdx
82#else
83 jmp HIDENAME(cerror)
84#endif
|