* Makefile.in (DLL_OFILES): Add wow64.o.

	* dcrt0.cc (CYGWIN_GUARD): Drop execute permission for stack, it's
	not used for stacks by the OS either.
	(child_info_fork::alloc_stack_hard_way): Ditto.
	(child_info_fork::alloc_stack): Don't alloc_stack_hard_way under WOW64
	if forked from a 64 bit parent.  Set child's StackBase to parent's
	StackBase.  Add comments to explain why.
	(wow64_respawn): Move to wow64.cc.
	(wow64_started_from_native64): Move to wow64.cc.
	(respawn_wow64_process): Move to wow64.cc.
	(dll_crt0_0): Drop wow64_test_stack_marker and move stack test into
	wow64_test_for_64bit_parent function.  Don't return early if WOW64
	process has been started from native 64 bit process.
	(_dll_crt0): Implement moving stack for WOW64 processes started from
	native 64 bit process.
	* wow64.cc: New file.
	(wow64_has_64bit_parent): Rename from wow64_respawn.
	(wow64_test_for_64bit_parent): Rename from wow64_started_from_native64.
	Change comment.
	(wow64_revert_to_original_stack): New function.
	(wow64_respawn_process): Rename from respawn_wow64_process for symmetry.
	* wow64.h: New file.

1 files changed, 15 insertions, 0 deletions

diff --git a/winsup/cygwin/wow64.h b/winsup/cygwin/wow64.h
new file mode 100644
index 000000000..bd0564f1f
--- /dev/null
+++ b/winsup/cygwin/wow64.h
@@ -0,0 +1,15 @@
+/* wow64.h
+
+   Copyright 2011 Red Hat, Inc.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+extern bool NO_COPY wow64_has_64bit_parent;
+
+extern bool wow64_test_for_64bit_parent ();
+extern PVOID wow64_revert_to_original_stack (PVOID &allocationbase);
+extern void wow64_respawn_process ();