| Quellcodebibliothek Statistik Leitseite products/sources/formale Sprachen/C/Linux/tools/perf/arch/x86/util/ (Open Source Betriebssystem Version 6.17.9©) Datei vom 24.10.2025 mit Größe 833 B |
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Quelle cpuid.h Sprache: C |
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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef PERF_CPUID_H #define PERF_CPUID_H 1 static inline void cpuid(unsigned int op, unsigned int op2, unsigned int *a, unsigned int *b, unsigned int *c, unsigned int *d) { /* * Preserve %ebx/%rbx register by either placing it in %rdi or saving it * on the stack - x86-64 needs to avoid the stack red zone. In PIC * compilations %ebx contains the address of the global offset * table. %rbx is occasionally used to address stack variables in * presence of dynamic allocas. */ asm( #if defined(__x86_64__) "mov %%rbx, %%rdi\n" "cpuid\n" "xchg %%rdi, %%rbx\n" #else "pushl %%ebx\n" "cpuid\n" "movl %%ebx, %%edi\n" "popl %%ebx\n" #endif : "=a"(*a), "=D"(*b), "=c"(*c), "=d"(*d) : "a"(op), "2"(op2)); } void get_cpuid_0(char *vendor, unsigned int *lvl); #endif
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2026-04-06