forked from xamidev/pepperOS
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
#ifndef X86_H
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#define X86_H
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#include <stdbool.h>
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#include <stdint.h>
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uint64_t rdmsr(uint32_t msr);
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void cpuid(uint32_t leaf, uint32_t* eax, uint32_t* ebx, uint32_t* ecx, uint32_t* edx);
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void wrmsr(uint32_t msr, uint64_t value);
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bool x86_has_msr();
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void x86_arch_init();
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/* Interrupt Descriptor Table */
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void idt_init(void);
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struct interrupt_descriptor {
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uint16_t address_low;
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uint16_t selector;
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uint8_t ist;
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uint8_t flags;
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uint16_t address_mid;
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uint32_t address_high;
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uint32_t reserved;
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} __attribute__((packed));
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struct idtr {
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uint16_t limit;
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uint64_t base;
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} __attribute__((packed));
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// All general-purpose registers (except rsp) as stored on the stack,
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// plus the values we pushed (vector number, error code) and the iret frame
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// In reverse order because the stack grows downwards.
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struct cpu_status_t {
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uint64_t r15;
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uint64_t r14;
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uint64_t r13;
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uint64_t r12;
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uint64_t r11;
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uint64_t r10;
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uint64_t r9;
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uint64_t r8;
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uint64_t rbp;
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uint64_t rdi;
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uint64_t rsi;
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uint64_t rdx;
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uint64_t rcx;
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uint64_t rbx;
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uint64_t rax;
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uint64_t vector_number;
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uint64_t error_code;
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uint64_t iret_rip;
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uint64_t iret_cs;
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uint64_t iret_flags;
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uint64_t iret_rsp;
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uint64_t iret_ss;
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};
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struct cpu_status_t* syscall_handler(struct cpu_status_t* regs);
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#endif |