* Copyright(c) 2010-2014 Intel Corporation
*/
-#include <elf.h>
-#include <fcntl.h>
#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
-#if __GLIBC_PREREQ(2, 16)
-#include <sys/auxv.h>
-#define HAS_AUXV 1
-#endif
-#endif
#include <rte_common.h>
#include <rte_cpuflags.h>
-#ifndef HAS_AUXV
-static unsigned long
-getauxval(unsigned long type __rte_unused)
-{
- 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);
-}
-
/**
* Checks if the machine is adequate for running the binary. If it is not, the
* program exits with status 1.