busybox/shell/ash_ptr_hack.c
2008-04-11 11:27:29 +00:00

30 lines
982 B
C

/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2008 by Denys Vlasenko <vda.linux@googlemail.com>
*
* Licensed under GPLv2, see file LICENSE in this tarball for details.
*/
struct globals_misc;
struct globals_memstack;
struct globals_var;
#ifndef GCC_COMBINE
/* We cheat here. They are declared as const ptr in ash.c,
* but here we make them live in R/W memory */
struct globals_misc *ash_ptr_to_globals_misc;
struct globals_memstack *ash_ptr_to_globals_memstack;
struct globals_var *ash_ptr_to_globals_var;
#else
/* gcc -combine will see through and complain */
/* Using alternative method which is more likely to break
* on weird architectures, compilers, linkers and so on */
struct globals_misc *const ash_ptr_to_globals_misc __attribute__ ((section (".data")));
struct globals_memstack *const ash_ptr_to_globals_memstack __attribute__ ((section (".data")));
struct globals_var *const ash_ptr_to_globals_var __attribute__ ((section (".data")));
#endif