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

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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>
37__FBSDID("$FreeBSD: head/lib/libc/i386/sys/brk.S 217106 2011-01-07 16:08:40Z kib $");
38
39#include "SYS.h"
40
41 .globl HIDENAME(curbrk)
42 .globl HIDENAME(minbrk)
43ENTRY(_brk)
44 jmp ok
45END(_brk)

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53 PIC_EPILOGUE
54 cmpl %eax,(%ecx)
55 jbe ok
56 movl (%ecx),%eax
57 movl %eax,4(%esp)
58ok:
59 mov $SYS_break,%eax
60 KERNCALL
61 jb err
62 movl 4(%esp),%eax
63 movl %eax,(%edx)
64 movl $0,%eax
65 ret
66err:
67 PIC_PROLOGUE
68 jmp PIC_PLT(HIDENAME(cerror))
69
70#else
71
72 movl 4(%esp),%eax
73 cmpl %eax,HIDENAME(minbrk)
74 jbe ok
75 movl HIDENAME(minbrk),%eax
76 movl %eax,4(%esp)
77ok:
78 mov $SYS_break,%eax
79 KERNCALL
80 jb err
81 movl 4(%esp),%eax
82 movl %eax,HIDENAME(curbrk)
83 movl $0,%eax
84 ret
85err:
86 jmp HIDENAME(cerror)
87#endif
88END(brk)
89
90 .section .note.GNU-stack,"",%progbits