+#ifndef HAS_AUXV
+static unsigned long
+getauxval(unsigned long type)
+{
+ errno = ENOTSUP;
+ return 0;
+}
+#endif
+
+#ifdef RTE_ARCH_64
+typedef Elf64_auxv_t Internal_Elfx_auxv_t;
+#else
+typedef Elf32_auxv_t Internal_Elfx_auxv_t;
+#endif
+
+
+/**
+ * Provides a method for retrieving values from the auxiliary vector and
+ * possibly running a string comparison.
+ *
+ * @return Always returns a result. When the result is 0, check errno
+ * to see if an error occurred during processing.
+ */
+static unsigned long
+_rte_cpu_getauxval(unsigned long type, const char *str)
+{
+ unsigned long val;
+
+ errno = 0;
+ val = getauxval(type);
+
+ if (!val && (errno == ENOTSUP || errno == ENOENT)) {
+ int auxv_fd = open("/proc/self/auxv", O_RDONLY);
+ Internal_Elfx_auxv_t auxv;
+
+ if (auxv_fd == -1)
+ return 0;
+
+ errno = ENOENT;
+ while (read(auxv_fd, &auxv, sizeof(auxv)) == sizeof(auxv)) {
+ if (auxv.a_type == type) {
+ errno = 0;
+ val = auxv.a_un.a_val;
+ if (str)
+ val = strcmp((const char *)val, str);
+ break;
+ }
+ }
+ close(auxv_fd);
+ }
+
+ return val;
+}
+
+unsigned long
+rte_cpu_getauxval(unsigned long type)
+{
+ return _rte_cpu_getauxval(type, NULL);
+}
+
+int
+rte_cpu_strcmp_auxval(unsigned long type, const char *str)
+{
+ return _rte_cpu_getauxval(type, str);
+}
+