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-rw-r--r--sysdeps/generic/errno.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/sysdeps/generic/errno.c b/sysdeps/generic/errno.c
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+++ b/sysdeps/generic/errno.c
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+/* Definition of `errno' variable. Canonical version.
+ Copyright (C) 2002, 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <tls.h>
+#include <dl-sysdep.h>
+#undef errno
+
+#if RTLD_PRIVATE_ERRNO
+
+/* Code compiled for rtld refers only to this name. */
+int rtld_errno attribute_hidden;
+
+#elif USE___THREAD
+
+__thread int errno;
+extern __thread int __libc_errno __attribute__ ((alias ("errno")))
+ attribute_hidden;
+
+#else
+
+/* This differs from plain `int errno;' in that it doesn't create
+ a common definition, but a plain symbol that resides in .bss,
+ which can have an alias. */
+int errno __attribute__ ((nocommon));
+strong_alias (errno, _errno)
+
+/* We declare these with compat_symbol so that they are not visible at
+ link time. Programs must use the accessor functions. RTLD is special,
+ since it's not exported from there at any time. */
+# if defined HAVE_ELF && defined SHARED && defined DO_VERSIONING
+# include <shlib-compat.h>
+compat_symbol (libc, errno, errno, GLIBC_2_0);
+compat_symbol (libc, _errno, _errno, GLIBC_2_0);
+# endif
+
+#endif