diff options
Diffstat (limited to 'libbb/ptr_to_globals.c')
-rw-r--r-- | libbb/ptr_to_globals.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/libbb/ptr_to_globals.c b/libbb/ptr_to_globals.c new file mode 100644 index 0000000..5f30e2a --- /dev/null +++ b/libbb/ptr_to_globals.c @@ -0,0 +1,35 @@ +/* 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. + */ + +#include <errno.h> + +struct globals; + +#ifndef GCC_COMBINE + +/* We cheat here. It is declared as const ptr in libbb.h, + * but here we make it live in R/W memory */ +struct globals *ptr_to_globals; + +#ifdef __GLIBC__ +int *bb_errno; +#endif + + +#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 *const ptr_to_globals __attribute__ ((section (".data"))); + +#ifdef __GLIBC__ +int *const bb_errno __attribute__ ((section (".data"))); +#endif + +#endif |