From f67c2579af54201fd3522996f18109fe9ceaa31f Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Tue, 19 Dec 2023 01:00:18 -0500 Subject: kernel/amd64: Re-organize AMD64 files Signed-off-by: Ian Moffett --- sys/arch/amd64/spectre.S | 54 ------------------------------------------------ 1 file changed, 54 deletions(-) delete mode 100644 sys/arch/amd64/spectre.S (limited to 'sys/arch/amd64/spectre.S') 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 - -__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 -- cgit v1.2.3