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38 lines
822 B
ArmAsm
38 lines
822 B
ArmAsm
/* $NetBSD: sbrk.S,v 1.13 2014/08/23 02:24:22 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 1.13 2014/08/23 02:24:22 matt Exp $")
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#endif /* LIBC_SCCS && !lint */
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.hidden _C_LABEL(__curbrk)
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.globl _C_LABEL(__curbrk)
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#ifdef WEAK_ALIAS
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WEAK_ALIAS(sbrk, _sbrk)
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#endif
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ENTRY(_sbrk)
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#ifdef __PIC__
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mflr %r0
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bcl 20,31,.LPIC0
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.LPIC0: mflr %r5
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mtlr %r0
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addis %r8,%r5,(_C_LABEL(__curbrk)-.LPIC0)@ha
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ldptru %r6,(_C_LABEL(__curbrk)-.LPIC0)@l(%r8)
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#else
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lis %r8,_C_LABEL(__curbrk)@ha
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ldptru %r6,_C_LABEL(__curbrk)@l(%r8) # 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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stptr %r7,0(%r8) # record new break
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blr
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1:
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BRANCH_TO_CERROR()
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END(_sbrk)
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