From 77cb03664e09fe19ad455cb69f757f1e46f62032 Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Sat, 14 Mar 2015 19:56:22 +0000
Subject: [PATCH] Use __get_cpuid if available.

---
 CMakeLists.txt               | 2 ++
 config.h.in                  | 2 ++
 src/libcryptobox/cryptobox.c | 7 +++++++
 3 files changed, 11 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a330a5a20..25df1a574 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -712,6 +712,7 @@ CHECK_INCLUDE_FILES(sys/eventfd.h HAVE_SYS_EVENTFD_H)
 CHECK_INCLUDE_FILES(aio.h HAVE_AIO_H)
 CHECK_INCLUDE_FILES(libaio.h HAVE_LIBAIO_H)
 CHECK_INCLUDE_FILES(unistd.h HAVE_UNISTD_H)
+CHECK_INCLUDE_FILES(cpuid.h HAVE_CPUID_H)
 
 # Some dependencies
 IF(HAVE_SYS_WAIT_H)
@@ -830,6 +831,7 @@ CHECK_SYMBOL_EXISTS(_SC_NPROCESSORS_ONLN unistd.h HAVE_SC_NPROCESSORS_ONLN)
 CHECK_SYMBOL_EXISTS(setbit sys/param.h PARAM_H_HAS_BITSET)
 CHECK_SYMBOL_EXISTS(getaddrinfo "sys/types.h;sys/socket.h;netdb.h" HAVE_GETADDRINFO)
 CHECK_SYMBOL_EXISTS(sched_yield "sched.h" HAVE_SCHED_YIELD)
+CHECK_SYMBOL_EXISTS(__get_cpuid "cpuid.h" HAVE_GET_CPUID)
 CHECK_SYMBOL_EXISTS(PCRE_CONFIG_JIT "pcre.h" HAVE_PCRE_JIT)
 
 FILE(WRITE ${CMAKE_BINARY_DIR}/pthread_setpshared.c "
diff --git a/config.h.in b/config.h.in
index 3bed214da..5e262235a 100644
--- a/config.h.in
+++ b/config.h.in
@@ -225,6 +225,8 @@
 #cmakedefine HAVE_EXPLICIT_BZERO 1
 #cmakedefine HAVE_WEAK_SYMBOLS   1
 #cmakedefine HAVE_PCRE_JIT       1
+#cmakedefine HAVE_GET_CPUID      1
+#cmakedefine HAVE_CPUID_H        1
 
 /* Configure allocator */
 #define uthash_malloc(sz) g_slice_alloc(sz)
diff --git a/src/libcryptobox/cryptobox.c b/src/libcryptobox/cryptobox.c
index d115f79c6..8674867d6 100644
--- a/src/libcryptobox/cryptobox.c
+++ b/src/libcryptobox/cryptobox.c
@@ -27,6 +27,9 @@
 #include "poly1305/poly1305.h"
 #include "curve25519/curve25519.h"
 #include "ottery.h"
+#ifdef HAVE_CPUID_H
+#include <cpuid.h>
+#endif
 
 unsigned long cpu_config = 0;
 
@@ -66,6 +69,9 @@ static void
 rspamd_cryptobox_cpuid (gint cpu[4], gint info)
 {
 #if defined(__GNUC__) && (defined(__x86_64__) || defined(__i386__))
+# if defined(HAVE_GET_CPUID)
+	__get_cpuid (info, &cpu[0], &cpu[1], &cpu[2], &cpu[3]);
+# else
 	__asm__ __volatile__ (
 			"cpuid":
 			"=a" (cpu[0]),
@@ -74,6 +80,7 @@ rspamd_cryptobox_cpuid (gint cpu[4], gint info)
 			"=d" (cpu[3]) :
 			"a" (info), "c" (0)
 	);
+# endif
 #else
 	memset (cpu, 0, sizeof (cpu));
 #endif
-- 
2.39.5