Added ntdll-aarch64-TEB patchset

patches/ntdll-aarch-TEB/0001-configure-Avoid-clobbering-x18-on-arm64-within-wine.patch

@@ -0,0 +1,39 @@
+From d99a6180cdca6274f1a8b868c38a89883daf6e23 Mon Sep 17 00:00:00 2001
+From: Martin Storsjo <martin@martin.st>
+Date: Wed, 21 Jun 2017 11:42:40 +0300
+Subject: [PATCH] configure: Avoid clobbering x18 on arm64 within wine
+
+On aarch64/arm64 on linux, the compiler is free to use x18 for normal
+code generation (while the register is reserved on iOS/darwin, and
+on windows).
+
+If targeting arm64, check for the flags that allows this register to
+be left untouched (the flag is supported both by gcc and clang).
+
+Similar issues can still pop up as soon as system library functions
+that happen to touch x18 are called, unless the system libraries have
+been built with the same flag.
+
+Signed-off-by: Martin Storsjo <martin@martin.st>
+---
+ configure.ac | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/configure.ac b/configure.ac
+index d1502bacf7..6cf838ef09 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -212,6 +212,10 @@ case $host in
+         [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdarg.h>]], [[void func(__builtin_ms_va_list *args);]])],
+                       [wine_cv_builtin_ms_va_list=yes],[wine_cv_builtin_ms_va_list=no])])
+     test $wine_cv_builtin_ms_va_list != no || AC_MSG_ERROR([You need clang >= 5.0 to build Wine for arm64.])
++    # Avoid clobbering the x18 register which is reserved in windows.
++    # This isn't complete/enough unless all of the system libraries have
++    # been built with the same flag though.
++    WINE_TRY_CFLAGS([-ffixed-x18], [CFLAGS="$CFLAGS -ffixed-x18"])
+     ;;
+   i[[3456789]]86*)
+     enable_win16=${enable_win16:-yes}
+-- 
+2.17.1
+

patches/ntdll-aarch-TEB/0002-ntdll-Always-restore-TEB-to-x18-on-aarch-64-on-retur.patch

@@ -0,0 +1,60 @@
+From ea639387658c32c0e7df03795462f140f8921f06 Mon Sep 17 00:00:00 2001
+From: Martin Storsjo <martin@martin.st>
+Date: Wed, 16 Aug 2017 23:48:40 +0300
+Subject: [PATCH] ntdll: Always restore TEB to x18 on aarch 64 on return
+ from calls to builtins
+
+This requires always enabling relaying of calls though.
+
+This isn't enough for cases where builtin functions call back into
+the user code though, but works well enough for all pratical cases
+I've run so far.
+
+This does give a bit of performance overhead, but it makes it
+possible to run most real arm64 binaries (all I've tried).
+
+Signed-off-by: Martin Storsjo <martin@martin.st>
+---
+ dlls/ntdll/loader.c | 8 +++++++-
+ dlls/ntdll/relay.c  | 4 ++++
+ 2 files changed, 11 insertions(+), 1 deletion(-)
+
+diff --git a/dlls/ntdll/loader.c b/dlls/ntdll/loader.c
+index 994ff6f215..1f40021b7a 100644
+--- a/dlls/ntdll/loader.c
++++ b/dlls/ntdll/loader.c
+@@ -1827,7 +1827,13 @@ static void load_builtin_callback( void *module, const char *filename )
+     SERVER_END_REQ;
+ 
+     /* setup relay debugging entry points */
+-    if (TRACE_ON(relay)) RELAY_SetupDLL( module );
++#ifdef __aarch64__
++    /* Always enable relay entry points on aarch64, to allow restoring
++     * the TEB to x18. */
++#else
++    if (TRACE_ON(relay))
++#endif
++        RELAY_SetupDLL( module );
+ }
+ 
+ 
+diff --git a/dlls/ntdll/relay.c b/dlls/ntdll/relay.c
+index 7974587c4a..1d88eddb3f 100644
+--- a/dlls/ntdll/relay.c
++++ b/dlls/ntdll/relay.c
+@@ -709,8 +709,12 @@ static LONGLONG WINAPI relay_call( struct relay_descr *descr, unsigned int idx,
+ {
+     unsigned int nb_args;
+     void *func = relay_trace_entry( descr, idx, stack, &nb_args );
++    void *teb;
+     LONGLONG ret = call_entry_point( func, nb_args, stack );
+     relay_trace_exit( descr, idx, stack[-1], ret );
++    teb = NtCurrentTeb();
++    /* Restore the TEB pointer, in case the builtin call clobbered it. */
++    __asm__ __volatile__( "mov x18, %0" : : "r" (teb) );
+     return ret;
+ }
+ 
+-- 
+2.17.1
+

patches/ntdll-aarch-TEB/definition

@@ -0,0 +1 @@
+Fixes: [38780] AArch64 platforms: register X18 (TEB) must remain reserved for Wine to run 64-bit ARM Windows applications.