2553298b1d
Init support for cpuid and rdtsc instruction handling in occlum. This patch includes: 1. cpuid exception handler for all information leaves; 2. rdtsc exception handler; 3. handler registration; 4. cpuid test; 5. rdtsc test. Signed-off-by: 散樗 <kailun.qkl@antfin.com>
20 lines
400 B
C
20 lines
400 B
C
#include <stdio.h>
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#include <stdint.h>
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static inline uint64_t native_rdtsc() {
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uint32_t hi, lo;
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asm volatile("rdtsc" : "=a"(lo), "=d"(hi));
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return (( (uint64_t)lo)|( ((uint64_t)hi)<<32 ));
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}
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int main(int argc, char **argv)
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{
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/* Gets rdtsc information and tests the SGX support of the rdtsc */
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uint64_t r;
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r = native_rdtsc();
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printf("rdtsc: %lu\n", r);
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return 0;
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}
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