Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / x86 / lib / gcc.c

diff --git a/qemu/roms/u-boot/arch/x86/lib/gcc.c b/qemu/roms/u-boot/arch/x86/lib/gcc.c
new file mode 100644 (file)
index 0000000..497ad75
--- /dev/null
+++ b/qemu/roms/u-boot/arch/x86/lib/gcc.c
@@ -0,0 +1,40 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2009 coresystems GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 or later of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#ifdef __GNUC__
+
+/*
+ * GCC's libgcc handling is quite broken. While the libgcc functions
+ * are always regparm(0) the code that calls them uses whatever the
+ * compiler call specifies. Therefore we need a wrapper around those
+ * functions. See gcc bug PR41055 for more information.
+ */
+#define WRAP_LIBGCC_CALL(type, name) \
+       type __normal_##name(type a, type b) __attribute__((regparm(0))); \
+       type __wrap_##name(type a, type b); \
+       type __attribute__((no_instrument_function)) \
+               __wrap_##name(type a, type b) \
+                { return __normal_##name(a, b); }
+
+WRAP_LIBGCC_CALL(long long, __divdi3)
+WRAP_LIBGCC_CALL(unsigned long long, __udivdi3)
+WRAP_LIBGCC_CALL(long long, __moddi3)
+WRAP_LIBGCC_CALL(unsigned long long, __umoddi3)
+
+#endif