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42 lines
609 B
42 lines
609 B
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SECTION .text
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%macro PROC 1
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align 16
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global %1
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%1:
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%endmacro
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;The first six integer or pointer arguments are passed in registers
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;RDI, RSI, RDX, RCX, R8, and R9
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;int
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;cpuid_amd64(int eax_in, int ecx_in, int *eax, int *ebx, int *ecx, int *edx)
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PROC cpuid_amd64
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; save registers
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push rbx
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push rdx
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push rcx
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push r8
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push r9
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mov rax, rdi
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mov rcx, rsi
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cpuid
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pop rdi
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mov [rdi], edx
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pop rdi
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mov [rdi], ecx
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pop rdi
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mov [rdi], ebx
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pop rdi
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mov [rdi], eax
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mov eax, 0
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; restore registers
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pop rbx
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ret;
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align 16
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