windows-nt/Source/XPSP1/NT/base/published/posix/setjmp.w
2020-09-26 16:20:57 +08:00

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/***
*setjmp.h - definitions/declarations for setjmp/longjmp routines
*
* Copyright (c) 1985-1996, Microsoft Corporation. All rights reserved.
*
*Purpose:
* This file defines the machine-dependent buffer used by
* setjmp/longjmp to save and restore the program state, and
* declarations for those routines.
* [ANSI/System V]
*
* The setjmp() that will be used by those who include this file
* is _setjmpex, which is safe for use with try/except/finally,
* but is slow. See <crt/setjmpex.h> and <crt/setjmp.h> for more.
*
****/
#ifndef _INC_SETJMP
#include <signal.h>
#ifndef __cplusplus
#define _CRTAPI1 __cdecl
#define _CRTAPI2 __cdecl
/*
* Posix programs use _setjmpex by default.
*/
/*
* Definitions specific to particular setjmp implementations.
*/
#if defined(_M_IX86)
#define longjmp _longjmpex
#define setjmp _setjmp
/*
* MS C8-32 or older MS C6-386 compilers
*/
#define _JBLEN 16
#define _JBTYPE int
/*
* Define jump buffer layout for x86 setjmp/longjmp
*/
typedef struct __JUMP_BUFFER {
unsigned long Ebp;
unsigned long Ebx;
unsigned long Edi;
unsigned long Esi;
unsigned long Esp;
unsigned long Eip;
unsigned long Registration;
unsigned long TryLevel;
unsigned long Cookie;
unsigned long UnwindFunc;
unsigned long UnwindData[6];
} _JUMP_BUFFER;
#elif defined(_ALPHA_)
/*
* Alpha implementations need a _JBLEN of 20 quadwords.
* A double is used only to obtain quadword size and alignment.
*/
#define _JBLEN 20
#define _JBTYPE double
#define _setjmp setjmp
/*
* Define jump buffer layout for Alpha setjmp/longjmp.
* A double is used only to obtain quadword size and alignment.
*/
typedef struct __JUMP_BUFFER {
unsigned long Fp;
unsigned long Pc;
unsigned long Seb;
unsigned long Type;
double FltF2;
double FltF3;
double FltF4;
double FltF5;
double FltF6;
double FltF7;
double FltF8;
double FltF9;
double IntS0;
double IntS1;
double IntS2;
double IntS3;
double IntS4;
double IntS5;
double IntS6;
double IntSp;
double Fir;
double Fill;
} _JUMP_BUFFER;
#elif defined(_M_IA64)
/*
* Length is 528 bytes
* Since this is allocated as an array of "__int64", the
* number of entries required is 66.
*
* All IA64 implementations need _JBLEN of 66
*/
#define _JBLEN 66
#define _JBTYPE __int64
#ifndef _INC_SETJMPEX
#define setjmp _setjmp
#endif
/*
* Define jump buffer layout for IA64 setjmp/longjmp.
*/
typedef struct __JUMP_BUFFER {
//
// x86 reserved.
//
unsigned long iAReserved[6];
//
// x86 C9.0 compatibility
//
unsigned long Registration; // point to the UnwindData field.
unsigned long TryLevel; // ignored by setjmp
unsigned long Cookie; // set to "VC20" by setjmp
unsigned long UnwindFunc; // set to EM longjmp() by setjmp
//
//
// First dword is zero to indicate it's an exception registration
// record prepared by EM setjmp function.
// Second dword is set to 0 for unsafe EM setjmp, and 1 for safe
// EM setjmp.
// Third dword is set to the setjmp site memory stack frame pointer.
// Fourth dword is set to the setjmp site backing store frame pointer.
//
unsigned long UnwindData[6];
//
// floating point status register,
// and preserved floating point registers fs0 - fs19
//
long double FltS0;
long double PadS0;
long double FltS1;
long double PadS1;
long double FltS2;
long double PadS2;
long double FltS3;
long double PadS3;
long double FltS4;
long double PadS4;
long double FltS5;
long double PadS5;
long double FltS6;
long double PadS6;
long double FltS7;
long double PadS7;
long double FltS8;
long double PadS8;
long double FltS9;
long double PadS9;
long double FltS10;
long double PadS10;
long double FltS11;
long double PadS11;
long double FltS12;
long double PadS12;
long double FltS13;
long double PadS13;
long double FltS14;
long double PadS14;
long double FltS15;
long double PadS15;
long double FltS16;
long double PadS16;
long double FltS17;
long double PadS17;
long double FltS18;
long double PadS18;
long double FltS19;
long double PadS19;
__int64 FPSR;
//
// return link and preserved branch registers bs0 - bs4
//
__int64 StIIP; // continuation address
__int64 BrS0;
__int64 BrS1;
__int64 BrS2;
__int64 BrS3;
__int64 BrS4;
//
// preserved general registers s0 - s3, sp, nats
//
__int64 IntS0;
__int64 IntS1;
__int64 IntS2;
__int64 IntS3;
//
// bsp, pfs, unat, lc
//
__int64 RsBSP;
__int64 RsPFS; // previous frame marker (cfm of setjmp's caller)
__int64 ApUNAT; // User Nat collection register (preserved)
__int64 ApLC; // loop counter
__int64 IntSp; // memory stack pointer
__int64 IntNats; // Nat bits of preserved integer regs s0 - s3
__int64 Preds; // predicates
} _JUMP_BUFFER;
#endif /* MIPS/Alpha/PPC/IA64 */
/* define the buffer type for holding the state information */
#ifndef _JMP_BUF_DEFINED
typedef _JBTYPE jmp_buf[_JBLEN];
#define _JMP_BUF_DEFINED
#endif
#ifndef _SIGJMP_BUF_DEFINED
#define _SIGJMP_BUF_DEFINED
/*
* sigjmp buf is just a jmp_buf plus an int to say whether the sigmask
* is saved or not, and a sigmask_t for the mask if it is saved.
*/
typedef _JBTYPE sigjmp_buf[_JBLEN + 2];
#endif /* _SIGJMP_BUF_DEFINED */
extern _JBTYPE * __cdecl _sigjmp_store_mask(sigjmp_buf, int);
#define sigsetjmp(_env, _save) \
setjmp(_sigjmp_store_mask((_env), (_save)))
/* function prototypes */
int __cdecl setjmp(jmp_buf);
void __cdecl longjmp(jmp_buf, int);
void __cdecl siglongjmp(sigjmp_buf, int);
/* function prototypes */
#endif /* __cplusplus */
#define _INC_SETJMP
#endif /* _INC_SETJMP */