diff options
Diffstat (limited to 'sysdeps/i386/i686/stack-aliasing.h')
| -rw-r--r-- | sysdeps/i386/i686/stack-aliasing.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/sysdeps/i386/i686/stack-aliasing.h b/sysdeps/i386/i686/stack-aliasing.h new file mode 100644 index 0000000000..1e35ceb206 --- /dev/null +++ b/sysdeps/i386/i686/stack-aliasing.h @@ -0,0 +1,28 @@ +/* Define macros for stack address aliasing issues for NPTL. i686 version. + Copyright (C) 2014 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, see + <http://www.gnu.org/licenses/>. */ + +/* It turns out that stack coloring is in general not good on P4s. Some + applications will benefit. We will probably have a configuration option + at some point. To enable coloring, set this to 128. */ +#define COLORING_INCREMENT 0 + +/* What is useful is to avoid the 64k aliasing problem which reliably + happens if all stacks use sizes which are a multiple of 64k. Tell + the stack allocator to disturb this by allocation one more page if + necessary. */ +#define MULTI_PAGE_ALIASING 65536 |