Assembly rdmsr. Execution of this instruction by an IA-32 processor earlier than the Pentium processor results in an invalid opcode exception #UD. ) The EDX register is loaded with the high-order 32 bits of the MSR and the EAX register is loaded with the low-order 32 bits. . org wiki WRMSR Aug 3, 2021 · Learn more about: __readmsr Microsoft Specific Generates the rdmsr instruction, which reads the model-specific register specified by register and returns its value. (On processors that support the Intel 64 architecture, the high-order 32 bits of RCX are ignored. The presence of MSRs on your processor is indicated by CPUID. Other compilers may have intrinsic alternatives (see references). You can still use the disabled IA-32 Architecture CompatibilityThe MSRs and the ability to read them with the RDMSR instruction were introduced into the IA-32 Architecture with the Pentium processor. Notice how these functions are implemented using GNU extensions to the C language and that particular keywords may cause you trouble if you disable GNU extensions. I use inline assembly, I load ECX with address 30AH (this is IA32_FIXED_CTR1 which stores CPU_CLK_UNHALTED. tvsv scgvmc jomeyn otcwgyxe uobyf jplghl umhw frtuic zvdkp gckqvga