/* * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ #include <errno.h> #include <unistd.h> #include <sys/syscall.h> libc_hidden_proto(brk) /* This must be initialized data because commons can't have aliases. */ void * __curbrk attribute_hidden = 0; int brk (void *addr) { void *newbrk; __asm__ __volatile__( "P0 = %2;\n\t" "R0 = %1;\n\t" "excpt 0;\n\t" "%0 = R0;\n\t" : "=r"(newbrk) : "r"(addr), "i" (__NR_brk): "P0" ); __curbrk = newbrk; if (newbrk < addr) { __set_errno (ENOMEM); return -1; } return 0; } libc_hidden_def(brk)