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- /*
- * excpt.h
- * This file has no copyright assigned and is placed in the Public Domain.
- * This file is a part of the mingw-runtime package.
- * No warranty is given; refer to the file DISCLAIMER within the package.
- *
- * Support for operating system level structured exception handling.
- *
- * NOTE: This is very preliminary stuff. I am also pretty sure it is
- * completely Intel specific.
- *
- */
-
- #ifndef _EXCPT_H_
- #define _EXCPT_H_
-
- /* All the headers include this file. */
- #include <_mingw.h>
-
- #include <windef.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 (despite 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 /* _EXCPT_H_ not defined */
-