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| author | Siddhesh Poyarekar <siddhesh@redhat.com> | 2013-06-15 00:09:26 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2013-06-15 00:09:26 +0530 |
| commit | 747ef469ffc9c9179ca9d76854167925b4e44346 (patch) | |
| tree | 9f8a3db8f6ddc37fd676f76ef9c35e4213f5ae13 /sysdeps/x86_64 | |
| parent | 1b2feed2640d7304f742b2f427f0b9b964e1dfc4 (diff) | |
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Add rtld-memset.S for x86_64
Resolves: BZ #15627
Add an assembler version of rtld-memset to avoid using SSE registers.
Diffstat (limited to 'sysdeps/x86_64')
| -rw-r--r-- | sysdeps/x86_64/rtld-memset.S | 37 | ||||
| -rw-r--r-- | sysdeps/x86_64/rtld-memset.c | 1 |
2 files changed, 37 insertions, 1 deletions
diff --git a/sysdeps/x86_64/rtld-memset.S b/sysdeps/x86_64/rtld-memset.S new file mode 100644 index 0000000000..18b4903109 --- /dev/null +++ b/sysdeps/x86_64/rtld-memset.S @@ -0,0 +1,37 @@ +/* memset implementation for the dynamic linker. This is separate from the + libc implementation to avoid writing to SSE registers. + Copyright (C) 2013 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/>. */ + +#include <sysdep.h> +#include "asm-syntax.h" + + + .text +/* void *memset (void *dest, char c, size_t count) + dest => %rdi + c => %rsi + count => %rdx */ +ENTRY (memset) + mov %rdx, %rcx + movzbl %sil, %eax + mov %rdi, %rdx + rep stosb + mov %rdx, %rax + ret +END (memset) +libc_hidden_builtin_def (memset) diff --git a/sysdeps/x86_64/rtld-memset.c b/sysdeps/x86_64/rtld-memset.c deleted file mode 100644 index 55f3835790..0000000000 --- a/sysdeps/x86_64/rtld-memset.c +++ /dev/null @@ -1 +0,0 @@ -#include <string/memset.c> |