116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/*
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* excpt.h
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is a part of the mingw-runtime package.
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* No warranty is given; refer to the file DISCLAIMER within the package.
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*
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* Support for operating system level structured exception handling.
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*
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* NOTE: This is very preliminary stuff. I am also pretty sure it is
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* completely Intel specific.
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*
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*/
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#ifndef _EXCPT_H_
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#define _EXCPT_H_
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/* All the headers include this file. */
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#include <_mingw.h>
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#include <windef.h>
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/*
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* NOTE: The constants structs and typedefs below should be defined in the
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* Win32 API headers.
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*/
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#define EH_NONCONTINUABLE 0x01
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#define EH_UNWINDING 0x02
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#define EH_EXIT_UNWIND 0x04
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#define EH_STACK_INVALID 0x08
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#define EH_NESTED_CALL 0x10
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#ifndef RC_INVOKED
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typedef enum {
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ExceptionContinueExecution,
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ExceptionContinueSearch,
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ExceptionNestedException,
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ExceptionCollidedUnwind
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} EXCEPTION_DISPOSITION;
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/*
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* End of stuff that should be in the Win32 API files.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* The type of function that is expected as an exception handler to be
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* installed with __try1.
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*/
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typedef EXCEPTION_DISPOSITION (*PEXCEPTION_HANDLER)
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(struct _EXCEPTION_RECORD*, void*, struct _CONTEXT*, void*);
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/*
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* This is not entirely necessary, but it is the structure installed by
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* the __try1 primitive below.
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*/
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typedef struct _EXCEPTION_REGISTRATION
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{
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struct _EXCEPTION_REGISTRATION* prev;
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PEXCEPTION_HANDLER handler;
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} EXCEPTION_REGISTRATION, *PEXCEPTION_REGISTRATION;
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typedef EXCEPTION_REGISTRATION EXCEPTION_REGISTRATION_RECORD;
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typedef PEXCEPTION_REGISTRATION PEXCEPTION_REGISTRATION_RECORD;
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/*
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* A macro which installs the supplied exception handler.
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* Push the pointer to the new handler onto the stack,
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* then push the pointer to the old registration structure (at fs:0)
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* onto the stack, then put a pointer to the new registration
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* structure (i.e. the current stack pointer) at fs:0.
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*/
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#ifdef _WIN64
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# define __try1(pHandler) \
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__asm__ __volatile__ ("pushq %0;pushq %%gs:0;movq %%rsp,%%gs:0;" : : \
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"g" (pHandler));
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#else
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# define __try1(pHandler) \
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__asm__ __volatile__ ("pushl %0;pushl %%fs:0;movl %%esp,%%fs:0;" : : \
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"g" (pHandler));
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#endif
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/*
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* A macro which (despite its name) *removes* an installed
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* exception handler. Should be used only in conjunction with the above
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* install routine __try1.
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* Move the pointer to the old reg. struct (at the current stack
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* position) to fs:0, replacing the pointer we installed above,
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* then add 8 to the stack pointer to get rid of the space we
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* used when we pushed on our new reg. struct above. Notice that
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* the stack must be in the exact state at this point that it was
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* after we did __try1 or this will smash things.
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*/
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#ifdef _WIN64
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# define __except1 \
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__asm__ __volatile__ ("movq (%%rsp),%%rax;movq %%rax,%%gs:0;addq \
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$16,%%rsp;" : : : "%rax");
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#else
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# define __except1 \
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__asm__ __volatile__ ("movl (%%esp),%%eax;movl %%eax,%%fs:0;addl \
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$8,%%esp;" : : : "%eax");
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* Not RC_INVOKED */
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#endif /* _EXCPT_H_ not defined */
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