42 lines
814 B
ArmAsm
42 lines
814 B
ArmAsm
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/* $NetBSD: sbrk.S,v 1.11 2011/01/16 02:43:10 matt Exp $ */
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#include "SYS.h"
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: sbrk.S,v 1.11 2011/01/16 02:43:10 matt Exp $")
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#endif /* LIBC_SCCS && !lint */
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.globl _C_LABEL(__curbrk)
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.globl _C_LABEL(_end)
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#ifdef WEAK_ALIAS
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WEAK_ALIAS(sbrk, _sbrk)
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#endif
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.data
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_C_LABEL(__curbrk):
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.long _C_LABEL(_end)
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.text
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ENTRY(_sbrk)
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#ifdef PIC
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mflr %r10
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PIC_GOTSETUP(%r5)
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mtlr %r10
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lwz %r5,_C_LABEL(__curbrk)@got(%r5)
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lwz %r6,0(%r5)
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#else
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lis %r5,_C_LABEL(__curbrk)@ha
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lwzu %r6,_C_LABEL(__curbrk)@l(%r5) # r6 = old break, r5 = &curbrk
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#endif
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add %r3,%r3,%r6
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mr %r7,%r3 # r7 = new break
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_DOSYSCALL(break) # break(new_break)
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bso 1f
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mr %r3,%r6 # set return value
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stw %r7,0(%r5) # record new break
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blr
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1:
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b _C_LABEL(__cerror)
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END(_sbrk)
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