#include #include #include #include #include #include "../../util/header.h" static inline void cpuid(unsigned int op, unsigned int *a, unsigned int *b, unsigned int *c, unsigned int *d) { __asm__ __volatile__ (".byte 0x53\n\tcpuid\n\t" "movl %%ebx, %%esi\n\t.byte 0x5b" : "=a" (*a), "=S" (*b), "=c" (*c), "=d" (*d) : "a" (op)); } static int __get_cpuid(char *buffer, size_t sz, const char *fmt) { unsigned int a, b, c, d, lvl; int family = -1, model = -1, step = -1; int nb; char vendor[16]; cpuid(0, &lvl, &b, &c, &d); strncpy(&vendor[0], (char *)(&b), 4); strncpy(&vendor[4], (char *)(&d), 4); strncpy(&vendor[8], (char *)(&c), 4); vendor[12] = '\0'; if (lvl >= 1) { cpuid(1, &a, &b, &c, &d); family = (a >> 8) & 0xf; /* bits 11 - 8 */ model = (a >> 4) & 0xf; /* Bits 7 - 4 */ step = a & 0xf; /* extended family */ if (family == 0xf) family += (a >> 20) & 0xff; /* extended model */ if (family >= 0x6) model += ((a >> 16) & 0xf) << 4; } nb = scnprintf(buffer, sz, fmt, vendor, family, model, step); /* look for end marker to ensure the entire data fit */ if (strchr(buffer, '$')) { buffer[nb-1] = '\0'; return 0; } return -1; } int get_cpuid(char *buffer, size_t sz) { return __get_cpuid(buffer, sz, "%s,%u,%u,%u$"); } char * get_cpuid_str(void) { char *buf = malloc(128); if (__get_cpuid(buf, 128, "%s-%u-%X$") < 0) { free(buf); return NULL; } return buf; } ef='/cgit.cgi/linux/net-next.git/refs/?id=919ce2a4f7487fea577131957448a457eb14d277'>refslog tree commit diff

path: root/tools/lib/bpf

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