loader: Make the loader position-independent on 64-bit.

configure

@@ -10244,7 +10244,7 @@ fi
     WINEPRELOADER_LDFLAGS="-static -nostartfiles -nodefaultlibs -Wl,-Ttext=0x7d400000"
 
     case $host_cpu in
-      *i[3456789]86* | x86_64 | *aarch64* | arm*)
+      *i[3456789]86* | arm*)
         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports -Wl,-Ttext-segment=0x7bc00000" >&5
 printf %s "checking whether the compiler supports -Wl,-Ttext-segment=0x7bc00000... " >&6; }
 if test ${ac_cv_cflags__Wl__Ttext_segment_0x7bc00000+y}
@@ -10337,6 +10337,36 @@ then :
   WINELOADER_LDFLAGS="$WINELOADER_LDFLAGS -Wl,-z,max-page-size=0x1000"
 fi
         ;;
+      *)
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports -Wl,-pie" >&5
+printf %s "checking whether the compiler supports -Wl,-pie... " >&6; }
+if test ${ac_cv_cflags__Wl__pie+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_wine_try_cflags_saved=$CFLAGS
+CFLAGS="$CFLAGS -Wl,-pie"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int main(int argc, char **argv) { return 0; }
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_cflags__Wl__pie=yes
+else $as_nop
+  ac_cv_cflags__Wl__pie=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+CFLAGS=$ac_wine_try_cflags_saved
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_cflags__Wl__pie" >&5
+printf "%s\n" "$ac_cv_cflags__Wl__pie" >&6; }
+if test "x$ac_cv_cflags__Wl__pie" = xyes
+then :
+  WINELOADER_LDFLAGS="$WINELOADER_LDFLAGS -Wl,-pie"
+fi
+        ;;
     esac
     ;;
 esac

configure.ac

@@ -770,7 +770,7 @@ case $host_os in
     WINEPRELOADER_LDFLAGS="-static -nostartfiles -nodefaultlibs -Wl,-Ttext=0x7d400000"
 
     case $host_cpu in
-      *i[[3456789]]86* | x86_64 | *aarch64* | arm*)
+      *i[[3456789]]86* | arm*)
         WINE_TRY_CFLAGS([-Wl,-Ttext-segment=0x7bc00000],
                         [case $host_os in
                          freebsd* | kfreebsd*-gnu) WINELOADER_LDFLAGS="$WINELOADER_LDFLAGS -Wl,-Ttext-segment=0x60000000" ;;
@@ -784,6 +784,10 @@ case $host_os in
         WINE_TRY_CFLAGS([-Wl,-z,max-page-size=0x1000],
                         [WINELOADER_LDFLAGS="$WINELOADER_LDFLAGS -Wl,-z,max-page-size=0x1000"])
         ;;
+      *)
+        WINE_TRY_CFLAGS([-Wl,-pie],
+                        [WINELOADER_LDFLAGS="$WINELOADER_LDFLAGS -Wl,-pie"])
+        ;;
     esac
     ;;
 esac