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sbrk.S revision 1.11.12.1 
      1  1.11.12.1      tls /*	$NetBSD: sbrk.S,v 1.11.12.1 2014/08/20 00:02:11 tls Exp $	*/
      2        1.1  thorpej 
      3        1.1  thorpej #include "SYS.h"
      4        1.1  thorpej 
      5       1.10     matt #if defined(LIBC_SCCS) && !defined(lint)
      6  1.11.12.1      tls __RCSID("$NetBSD: sbrk.S,v 1.11.12.1 2014/08/20 00:02:11 tls Exp $")
      7       1.10     matt #endif /* LIBC_SCCS && !lint */
      8       1.10     matt 
      9        1.5   kleink 	.globl	_C_LABEL(__curbrk)
     10        1.6   kleink 	.globl	_C_LABEL(_end)
     11        1.1  thorpej 
     12        1.7   kleink #ifdef WEAK_ALIAS
     13        1.7   kleink WEAK_ALIAS(sbrk, _sbrk)
     14        1.7   kleink #endif
     15        1.7   kleink 
     16        1.1  thorpej 	.data
     17        1.5   kleink _C_LABEL(__curbrk):
     18        1.6   kleink 	.long	_C_LABEL(_end)
     19        1.1  thorpej 	.text
     20        1.1  thorpej 
     21        1.7   kleink ENTRY(_sbrk)
     22  1.11.12.1      tls #ifdef __PIC__
     23        1.9     matt 	mflr	%r10
     24       1.11     matt 	PIC_GOTSETUP(%r5)
     25        1.9     matt 	mtlr	%r10
     26        1.9     matt 	lwz	%r5,_C_LABEL(__curbrk)@got(%r5)
     27        1.9     matt 	lwz	%r6,0(%r5)
     28        1.1  thorpej #else
     29        1.9     matt 	lis	%r5,_C_LABEL(__curbrk)@ha
     30       1.10     matt 	lwzu	%r6,_C_LABEL(__curbrk)@l(%r5)	# r6 = old break, r5 = &curbrk
     31        1.4   tsubai #endif
     32        1.9     matt 	add	%r3,%r3,%r6
     33        1.9     matt 	mr	%r7,%r3				# r7 = new break
     34       1.10     matt 	_DOSYSCALL(break)			# break(new_break)
     35        1.1  thorpej 	bso	1f
     36        1.9     matt 	mr	%r3,%r6				# set return value
     37       1.10     matt 	stw	%r7,0(%r5)			# record new break
     38        1.1  thorpej 	blr
     39        1.1  thorpej 1:
     40       1.10     matt 	b	_C_LABEL(__cerror)
     41       1.10     matt END(_sbrk)
     42