1 files changed, 123 insertions, 0 deletions
diff --git a/winsup/mingw/include/excpt.h b/winsup/mingw/include/excpt.h
new file mode 100644
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+++ b/winsup/mingw/include/excpt.h
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+/* 
+ * excpt.h
+ *
+ * Support for operating system level structured exception handling.
+ *
+ * NOTE: This is very preliminary stuff. I am also pretty sure it is
+ *       completely Intel specific.
+ *
+ * This file is part of the Mingw32 package.
+ *
+ * Contributors:
+ *  Created by Colin Peters <colin@bird.fu.is.saga-u.ac.jp>
+ *  Based on code by Mikey <jeffdb@netzone.com>
+ *
+ *  THIS SOFTWARE IS NOT COPYRIGHTED
+ *
+ *  This source code is offered for use in the public domain. You may
+ *  use, modify or distribute it freely.
+ *
+ *  This code is distributed in the hope that it will be useful but
+ *  WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
+ *  DISCLAMED. This includes but is not limited to warranties of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $Revision$
+ * $Author$
+ * $Date$
+ *
+ */
+
+#ifndef	_EXCPT_H_
+#define	_EXCPT_H_
+
+/* All the headers include this file. */
+#include <_mingw.h>
+
+#ifndef	__STRICT_ANSI__
+
+#include <windows.h>
+
+/*
+ * NOTE: The constants structs and typedefs below should be defined in the
+ *       Win32 API headers.
+ */
+#define	EH_NONCONTINUABLE	0x01
+#define	EH_UNWINDING		0x02
+#define	EH_EXIT_UNWIND		0x04
+#define	EH_STACK_INVALID	0x08
+#define	EH_NESTED_CALL		0x10
+
+#ifndef	RC_INVOKED
+
+typedef enum {
+	ExceptionContinueExecution,
+	ExceptionContinueSearch,
+	ExceptionNestedException,
+	ExceptionCollidedUnwind
+} EXCEPTION_DISPOSITION;
+
+
+/*
+ * End of stuff that should be in the Win32 API files.
+ */
+
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * The type of function that is expected as an exception handler to be
+ * installed with _try1.
+ */
+typedef EXCEPTION_DISPOSITION (*PEXCEPTION_HANDLER)
+		(struct _EXCEPTION_RECORD*, void*, struct _CONTEXT*, void*);
+
+/*
+ * This is not entirely necessary, but it is the structure installed by
+ * the _try1 primitive below.
+ */
+typedef struct _EXCEPTION_REGISTRATION
+{
+	struct _EXCEPTION_REGISTRATION*	prev;
+	PEXCEPTION_HANDLER		handler;
+} EXCEPTION_REGISTRATION, *PEXCEPTION_REGISTRATION;
+
+typedef EXCEPTION_REGISTRATION EXCEPTION_REGISTRATION_RECORD;
+typedef PEXCEPTION_REGISTRATION PEXCEPTION_REGISTRATION_RECORD;
+
+/*
+ * A macro which installs the supplied exception handler.
+ * Push the pointer to the new handler onto the stack,
+ * then push the pointer to the old registration structure (at fs:0)
+ * onto the stack, then put a pointer to the new registration
+ * structure (i.e. the current stack pointer) at fs:0.
+ */
+#define __try1(pHandler) \
+	__asm__ ("pushl %0;pushl %%fs:0;movl %%esp,%%fs:0;" : : "g" (pHandler));
+
+/*
+ * A macro which (dispite its name) *removes* an installed
+ * exception handler. Should be used only in conjunction with the above
+ * install routine __try1.
+ * Move the pointer to the old reg. struct (at the current stack
+ * position) to fs:0, replacing the pointer we installed above,
+ * then add 8 to the stack pointer to get rid of the space we
+ * used when we pushed on our new reg. struct above. Notice that
+ * the stack must be in the exact state at this point that it was
+ * after we did _try1 or this will smash things.
+ */
+#define	__except1	\
+	__asm__ ("movl (%%esp),%%eax;movl %%eax,%%fs:0;addl $8,%%esp;" \
+	 : : : "%eax");
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* Not RC_INVOKED */
+
+#endif	/* Not strict ANSI */
+
+#endif	/* _EXCPT_H_ not defined */