65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
#ifndef _KERNEL_PLATFORM_X86_REGISTERS_H
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#define _KERNEL_PLATFORM_X86_REGISTERS_H
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#include <libkern/types.h>
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extern uintptr_t read_ip();
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static inline uintptr_t read_cr2()
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{
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uintptr_t val;
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asm volatile("mov %%cr2, %0"
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: "=r"(val));
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return val;
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}
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static inline uintptr_t read_cr3()
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{
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uintptr_t val;
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asm volatile("mov %%cr3, %0"
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: "=r"(val));
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return val;
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}
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static inline uintptr_t read_sp()
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{
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uintptr_t val;
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#ifdef BITS32
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asm volatile("mov %%esp, %0"
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: "=r"(val));
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#else
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asm volatile("mov %%rsp, %0"
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: "=r"(val));
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#endif
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return val;
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}
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static inline uintptr_t read_bp()
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{
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uintptr_t val;
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#ifdef BITS32
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asm volatile("mov %%ebp, %0"
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: "=r"(val));
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#else
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asm volatile("mov %%rbp, %0"
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: "=r"(val));
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#endif
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return val;
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}
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static inline uintptr_t read_cr0()
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{
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uintptr_t val;
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asm volatile("mov %%cr0, %0"
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: "=r"(val));
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return val;
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}
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static inline void write_cr0(uintptr_t val)
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{
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asm volatile("mov %0, %%cr0"
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:
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: "r"(val)
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: "memory");
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}
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#endif /* _KERNEL_PLATFORM_X86_REGISTERS_H */ |