minix/lib/libc/arch/powerpc/sys/sbrk.S
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

42 lines
820 B
ArmAsm

/* $NetBSD: sbrk.S,v 1.12 2013/09/12 15:36:15 joerg Exp $ */
#include "SYS.h"
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: sbrk.S,v 1.12 2013/09/12 15:36:15 joerg Exp $")
#endif /* LIBC_SCCS && !lint */
.globl _C_LABEL(__curbrk)
.globl _C_LABEL(_end)
#ifdef WEAK_ALIAS
WEAK_ALIAS(sbrk, _sbrk)
#endif
.data
_C_LABEL(__curbrk):
.long _C_LABEL(_end)
.text
ENTRY(_sbrk)
#ifdef __PIC__
mflr %r10
PIC_GOTSETUP(%r5)
mtlr %r10
lwz %r5,_C_LABEL(__curbrk)@got(%r5)
lwz %r6,0(%r5)
#else
lis %r5,_C_LABEL(__curbrk)@ha
lwzu %r6,_C_LABEL(__curbrk)@l(%r5) # r6 = old break, r5 = &curbrk
#endif
add %r3,%r3,%r6
mr %r7,%r3 # r7 = new break
_DOSYSCALL(break) # break(new_break)
bso 1f
mr %r3,%r6 # set return value
stw %r7,0(%r5) # record new break
blr
1:
b _C_LABEL(__cerror)
END(_sbrk)