diff options
| author | Ian Moffett <ian@osmora.org> | 2023-12-19 01:00:18 -0500 |
|---|---|---|
| committer | Ian Moffett <ian@osmora.org> | 2023-12-19 01:03:46 -0500 |
| commit | f67c2579af54201fd3522996f18109fe9ceaa31f (patch) | |
| tree | 3dffda9861803cd7c53824457cc3bb3e16decfc5 /sys/arch/amd64/spectre.S | |
| parent | 979fca86b84c641cc1c763d8881266f6ab4ba700 (diff) | |
kernel/amd64: Re-organize AMD64 files
Signed-off-by: Ian Moffett <ian@osmora.org>
Diffstat (limited to 'sys/arch/amd64/spectre.S')
| -rw-r--r-- | sys/arch/amd64/spectre.S | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/sys/arch/amd64/spectre.S b/sys/arch/amd64/spectre.S deleted file mode 100644 index f293ab0..0000000 --- a/sys/arch/amd64/spectre.S +++ /dev/null @@ -1,54 +0,0 @@ -/* - * Copyright (c) 2023 Ian Marco Moffett and the Osmora Team. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of Hyra nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - - #include <sys/cdefs.h> - -__KERNEL_META "$Hyra$: spectre.S, Ian Marco Moffett, \ - Spectre mitigation detection" - -.text -.globl __can_mitigate_spectre - -__can_mitigate_spectre: - xor %ecx, %ecx // NULL out ECX - mov $0x7, %eax // 0x7 (Check IBRS) - cpuid - - /* Check if supported (if EDX[26] == 1) */ - mov $1, %ebx - shl $26, %ebx - test %ebx, %edx - jnz supported -not_supported: - xor %rax, %rax - jmp 1f -supported: - mov $1, %rax -1: - ret |