/* From libc-5.3.12 */ /* * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ #include <unistd.h> #include <sys/syscall.h> #include <errno.h> #include "sysdep.h" libc_hidden_proto(sbrk) extern void * __curbrk; libc_hidden_proto(__curbrk) extern int __init_brk (void); libc_hidden_proto(__init_brk) void * sbrk(intptr_t increment) { if (__init_brk () == 0) { void * tmp = __curbrk + increment; /* * Notice that we don't need to save/restore the GOT * register since that is not call clobbered by the syscall. */ asm ("move.d %1,$r10\n\t" "movu.w " STR(__NR_brk) ",$r9\n\t" "break 13\n\t" "move.d $r10, %0" : "=r" (__curbrk) : "g" (tmp) : "r9", "r10"); if (__curbrk == tmp) return tmp - increment; __set_errno(ENOMEM); return ((void *) -1); } return ((void *) -1); } libc_hidden_def(sbrk)