/* * 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" extern void * __curbrk attribute_hidden; extern int __init_brk (void) attribute_hidden; libc_hidden_proto(brk) int brk(void * end_data_seg) { if (__init_brk () == 0) { /* * 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" (end_data_seg) : "r9", "r10"); if (__curbrk == end_data_seg) return 0; __set_errno(ENOMEM); } return -1; } libc_hidden_def(brk)