Kameleon
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
/* Copyright (C) 2024 anonymous
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This file is part of PSFree.
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PSFree is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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PSFree is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#pragma once
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#include <stddef.h>
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#include "types.h"
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inline u64 rdmsr(u32 msr) {
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u32 low, high;
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__asm __volatile("rdmsr" : "=a" (low), "=d" (high) : "c" (msr));
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return (low | ((u64)high << 32));
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}
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void enable_cr0_wp(void) {
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asm(
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"mov rax, cr0\n"
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"or rax, 0x10000\n"
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"mov cr0, rax\n"
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);
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}
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void disable_cr0_wp(void) {
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asm(
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"mov rax, cr0\n"
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"and rax, ~0x10000\n"
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"mov cr0, rax\n"
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);
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}
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inline void write8(void *addr, size_t offset, u8 value) {
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*(u8 *)(addr + offset) = value;
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}
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inline void write16(void *addr, size_t offset, u16 value) {
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*(u16 *)(addr + offset) = value;
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}
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inline void write32(void *addr, size_t offset, u32 value) {
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*(u32 *)(addr + offset) = value;
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}
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inline void write64(void *addr, size_t offset, u64 value) {
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*(u64 *)(addr + offset) = value;
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}
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