Martin Storsjo : arm64: Use __builtin_ms_va_list and __attribute__((ms_abi )) on arm64.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 8fb8cc03c3edb599dd98f369e14a08f899cbff95
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=8fb8cc03c3edb599dd98f369e...

Author: Martin Storsjo <martin(a)martin.st>
Date:   Wed May  9 23:34:57 2018 +0300

arm64: Use __builtin_ms_va_list and __attribute__((ms_abi)) on arm64.

Windows uses a different ABI for va_list on arm64 just like on x86_64.

On x86_64, the calling convention for windows functions is completely
different from the one on other platforms. On arm64, they're mostly the
same, with the only exception being variadic functions (where all float
arguments are passed in integer registers, since the va_list is a single
pointer).

Any functions using __builtin_ms_va_start need to be decorated with
__attribute__((ms_abi)).

Signed-off-by: Martin Storsjo <martin(a)martin.st>
Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>

---

 configure                | 24 ++++++++++++++++++++++++
 configure.ac             |  7 +++++++
 include/msvcrt/crtdefs.h |  6 +++++-
 include/windef.h         |  6 +++++-
 include/wine/test.h      |  4 ++--
 5 files changed, 43 insertions(+), 4 deletions(-)

diff --git a/configure b/configure
index 30d53da..d53583d 100755
--- a/configure
+++ b/configure
@@ -5409,6 +5409,30 @@ rm -f core conftest.err conftest.$ac_objext \
     TARGETFLAGS="-marm -mfloat-abi=$float_abi"
 
     ;;
+  aarch64*)
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports __builtin_ms_va_list" >&5
+$as_echo_n "checking whether $CC supports __builtin_ms_va_list... " >&6; }
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdarg.h>
+int
+main ()
+{
+void func(__builtin_ms_va_list *args);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+                       as_fn_error $? "You need clang >= 5.0 to build Wine for arm64." "$LINENO" 5
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+    ;;
   i[3456789]86*)
     enable_win16=${enable_win16:-yes}
     ;;
diff --git a/configure.ac b/configure.ac
index 54c31d8..b4a8ef0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -205,6 +205,13 @@ case $host in
     CFLAGS="$CFLAGS -marm -mfloat-abi=$float_abi"
     AC_SUBST(TARGETFLAGS,"-marm -mfloat-abi=$float_abi")
     ;;
+  aarch64*)
+    AC_MSG_CHECKING([whether $CC supports __builtin_ms_va_list])
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdarg.h>]], [[void func(__builtin_ms_va_list *args);]])],
+                      [AC_MSG_RESULT([yes])],
+                      [AC_MSG_RESULT([no])
+                       AC_MSG_ERROR([You need clang >= 5.0 to build Wine for arm64.])])
+    ;;
   i[[3456789]]86*)
     enable_win16=${enable_win16:-yes}
     ;;
diff --git a/include/msvcrt/crtdefs.h b/include/msvcrt/crtdefs.h
index a9edef5..0c0b087 100644
--- a/include/msvcrt/crtdefs.h
+++ b/include/msvcrt/crtdefs.h
@@ -62,6 +62,8 @@
 #  endif
 # elif defined(__arm__) && defined (__GNUC__) && !defined(__SOFTFP__)
 #   define __stdcall __attribute__((pcs("aapcs-vfp")))
+# elif defined(__aarch64__) && defined (__GNUC__)
+#  define __stdcall __attribute__((ms_abi))
 # else  /* __i386__ */
 #  define __stdcall
 # endif  /* __i386__ */
@@ -82,13 +84,15 @@
 #  endif
 # elif defined(__arm__) && defined (__GNUC__) && !defined(__SOFTFP__)
 #   define __cdecl __attribute__((pcs("aapcs-vfp")))
+# elif defined(__aarch64__) && defined (__GNUC__)
+#  define __cdecl __attribute__((ms_abi))
 # elif !defined(_MSC_VER)
 #  define __cdecl
 # endif
 #endif /* __cdecl */
 
 #ifndef __ms_va_list
-# if defined(__x86_64__) && defined (__GNUC__)
+# if (defined(__x86_64__) || defined(__aarch64__)) && defined (__GNUC__)
 #  define __ms_va_list __builtin_ms_va_list
 #  define __ms_va_start(list,arg) __builtin_ms_va_start(list,arg)
 #  define __ms_va_end(list) __builtin_ms_va_end(list)
diff --git a/include/windef.h b/include/windef.h
index 40028f3..8e8a08a 100644
--- a/include/windef.h
+++ b/include/windef.h
@@ -71,6 +71,8 @@ extern "C" {
 #  endif
 # elif defined(__arm__) && defined (__GNUC__) && !defined(__SOFTFP__)
 #   define __stdcall __attribute__((pcs("aapcs-vfp")))
+# elif defined(__aarch64__) && defined (__GNUC__)
+#  define __stdcall __attribute__((ms_abi))
 # else  /* __i386__ */
 #  define __stdcall
 # endif  /* __i386__ */
@@ -91,13 +93,15 @@ extern "C" {
 #  endif
 # elif defined(__arm__) && defined (__GNUC__) && !defined(__SOFTFP__)
 #   define __cdecl __attribute__((pcs("aapcs-vfp")))
+# elif defined(__aarch64__) && defined (__GNUC__)
+#  define __cdecl __attribute__((ms_abi))
 # elif !defined(_MSC_VER)
 #  define __cdecl
 # endif
 #endif /* __cdecl */
 
 #ifndef __ms_va_list
-# if defined(__x86_64__) && defined (__GNUC__)
+# if (defined(__x86_64__) || defined(__aarch64__)) && defined (__GNUC__)
 #  define __ms_va_list __builtin_ms_va_list
 #  define __ms_va_start(list,arg) __builtin_ms_va_start(list,arg)
 #  define __ms_va_end(list) __builtin_ms_va_end(list)
diff --git a/include/wine/test.h b/include/wine/test.h
index 21e2ac7..e3e4bcf 100644
--- a/include/wine/test.h
+++ b/include/wine/test.h
@@ -90,7 +90,7 @@ static inline int winetest_strcmpW( const WCHAR *str1, const WCHAR *str2 )
 #define START_TEST(name) void func_##name(void)
 #endif
 
-#if defined(__x86_64__) && defined(__GNUC__) && defined(__WINE_USE_MSVCRT)
+#if (defined(__x86_64__) || defined(__aarch64__)) && defined(__GNUC__) && defined(__WINE_USE_MSVCRT)
 #define __winetest_cdecl __cdecl
 #define __winetest_va_list __builtin_ms_va_list
 #else
@@ -181,7 +181,7 @@ extern void __winetest_cdecl winetest_trace( const char *msg, ... ) WINETEST_PRI
 #include <stdio.h>
 #include <excpt.h>
 
-#if defined(__x86_64__) && defined(__GNUC__) && defined(__WINE_USE_MSVCRT)
+#if (defined(__x86_64__) || defined(__aarch64__)) && defined(__GNUC__) && defined(__WINE_USE_MSVCRT)
 # define __winetest_va_start(list,arg) __builtin_ms_va_start(list,arg)
 # define __winetest_va_end(list) __builtin_ms_va_end(list)
 #else