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Rev 2444 Rev 3485
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        : "=r" (v)
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        : "=r" (v)
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    );
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    );
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    return v;
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    return v;
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}
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}
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/** Write to MSR */
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static inline void write_msr(uint32_t msr, uint64_t value)
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{
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    asm volatile ("wrmsr" : : "c" (msr), "a" ((uint32_t)(value)),
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        "d" ((uint32_t)(value >> 32)));
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}
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static inline uint64_t read_msr(uint32_t msr)
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{
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    uint32_t ax, dx;
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    asm volatile ("rdmsr" : "=a"(ax), "=d"(dx) : "c" (msr));
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    return ((uint64_t)dx << 32) | ax;
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}
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/** Return base address of current stack
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/** Return base address of current stack
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 *
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 *
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 * Return the base address of the current stack.
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 * Return the base address of the current stack.
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 * The stack is assumed to be STACK_SIZE bytes long.
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 * The stack is assumed to be STACK_SIZE bytes long.
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 * The stack must start on page boundary.
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 * The stack must start on page boundary.