diff --git a/crypto/cpu_arm_linux.c b/crypto/cpu_arm_linux.c
index 25b50f6..d13ac21 100644
--- a/crypto/cpu_arm_linux.c
+++ b/crypto/cpu_arm_linux.c
@@ -18,6 +18,7 @@
     !defined(OPENSSL_STATIC_ARMCAP)
 #include <errno.h>
 #include <fcntl.h>
+#include <sys/auxv.h>
 #include <sys/types.h>
 #include <unistd.h>
 
@@ -26,13 +27,6 @@
 
 #include "cpu_arm_linux.h"
 
-#define AT_HWCAP 16
-#define AT_HWCAP2 26
-
-// |getauxval| is not available on Android until API level 20. Link it as a weak
-// symbol and use other methods as fallback.
-unsigned long getauxval(unsigned long type) __attribute__((weak));
-
 static int open_eintr(const char *path, int flags) {
   int ret;
   do {
@@ -49,21 +43,6 @@
   return ret;
 }
 
-// read_full reads exactly |len| bytes from |fd| to |out|. On error or end of
-// file, it returns zero.
-static int read_full(int fd, void *out, size_t len) {
-  char *outp = out;
-  while (len > 0) {
-    ssize_t ret = read_eintr(fd, outp, len);
-    if (ret <= 0) {
-      return 0;
-    }
-    outp += ret;
-    len -= ret;
-  }
-  return 1;
-}
-
 // read_file opens |path| and reads until end-of-file. On success, it returns
 // one and sets |*out_ptr| and |*out_len| to a newly-allocated buffer with the
 // contents. Otherwise, it returns zero.
@@ -116,32 +95,6 @@
   return ret;
 }
 
-// getauxval_proc behaves like |getauxval| but reads from /proc/self/auxv.
-static unsigned long getauxval_proc(unsigned long type) {
-  int fd = open_eintr("/proc/self/auxv", O_RDONLY);
-  if (fd < 0) {
-    return 0;
-  }
-
-  struct {
-    unsigned long tag;
-    unsigned long value;
-  } entry;
-
-  for (;;) {
-    if (!read_full(fd, &entry, sizeof(entry)) ||
-        (entry.tag == 0 && entry.value == 0)) {
-      break;
-    }
-    if (entry.tag == type) {
-      close(fd);
-      return entry.value;
-    }
-  }
-  close(fd);
-  return 0;
-}
-
 extern uint32_t OPENSSL_armcap_P;
 
 static int g_needs_hwcap2_workaround;
@@ -157,25 +110,8 @@
   cpuinfo.data = cpuinfo_data;
   cpuinfo.len = cpuinfo_len;
 
-  // |getauxval| is not available on Android until API level 20. If it is
-  // unavailable, read from /proc/self/auxv as a fallback. This is unreadable
-  // on some versions of Android, so further fall back to /proc/cpuinfo.
-  //
-  // See
-  // https://android.googlesource.com/platform/ndk/+/882ac8f3392858991a0e1af33b4b7387ec856bd2
-  // and b/13679666 (Google-internal) for details.
-  unsigned long hwcap = 0;
-  if (getauxval != NULL) {
-    hwcap = getauxval(AT_HWCAP);
-  }
-  if (hwcap == 0) {
-    hwcap = getauxval_proc(AT_HWCAP);
-  }
-  if (hwcap == 0) {
-    hwcap = crypto_get_arm_hwcap_from_cpuinfo(&cpuinfo);
-  }
-
   // Matching OpenSSL, only report other features if NEON is present.
+  unsigned long hwcap = getauxval(AT_HWCAP);
   if (hwcap & HWCAP_NEON) {
     OPENSSL_armcap_P |= ARMV7_NEON;
 
@@ -184,10 +120,7 @@
     // this is now rare (see Chrome's Net.NeedsHWCAP2Workaround metric), but AES
     // and PMULL extensions are very useful, so we still carry the workaround
     // for now.
-    unsigned long hwcap2 = 0;
-    if (getauxval != NULL) {
-      hwcap2 = getauxval(AT_HWCAP2);
-    }
+    unsigned long hwcap2 = getauxval(AT_HWCAP2);
     if (hwcap2 == 0) {
       hwcap2 = crypto_get_arm_hwcap2_from_cpuinfo(&cpuinfo);
       g_needs_hwcap2_workaround = hwcap2 != 0;