61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
#ifndef _VISOR_CR_H_
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#define _VISOR_CR_H_
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#include <stdint.h>
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#define CR4_VMXE (1 << 13)
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// TODO properly handle segment registers as 16-bit values
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#define DECLARE_REGISTER_ACCESSORS(regname)\
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static inline uint64_t read##regname(void) {\
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uint64_t v;\
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__asm__ ("mov %%" #regname ", %0\n\t" : "=a"(v));\
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return v;\
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}\
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static inline void write##regname(uint64_t v) {\
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__asm__ ("mov %0, %%" #regname "\n\t" :: "a"(v));\
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}
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/* Segment Selectors */
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DECLARE_REGISTER_ACCESSORS(es)
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DECLARE_REGISTER_ACCESSORS(cs)
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DECLARE_REGISTER_ACCESSORS(ss)
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DECLARE_REGISTER_ACCESSORS(ds)
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DECLARE_REGISTER_ACCESSORS(fs)
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DECLARE_REGISTER_ACCESSORS(gs)
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/* Control Registers */
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DECLARE_REGISTER_ACCESSORS(cr0)
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DECLARE_REGISTER_ACCESSORS(cr1)
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DECLARE_REGISTER_ACCESSORS(cr2)
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DECLARE_REGISTER_ACCESSORS(cr3)
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DECLARE_REGISTER_ACCESSORS(cr4)
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/* Debug Registers */
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DECLARE_REGISTER_ACCESSORS(dr0)
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DECLARE_REGISTER_ACCESSORS(dr1)
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DECLARE_REGISTER_ACCESSORS(dr2)
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DECLARE_REGISTER_ACCESSORS(dr3)
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DECLARE_REGISTER_ACCESSORS(dr4)
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DECLARE_REGISTER_ACCESSORS(dr5)
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DECLARE_REGISTER_ACCESSORS(dr6)
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DECLARE_REGISTER_ACCESSORS(dr7)
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static inline uint16_t
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readtr(void)
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{
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uint16_t v;
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__asm__ ("str %0\n\t" : "=a"(v));
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return v;
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}
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static inline uint64_t
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readflags(void)
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{
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uint64_t v;
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__asm__ ("pushf\n\tpop %0\n\t" : "=a"(v));
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return v;
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}
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#endif
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