65fea56f17cd614bc8908264df980a62e1931468vboxsync/****************************************************************************
65fea56f17cd614bc8908264df980a62e1931468vboxsync* Realmode X86 Emulator Library
65fea56f17cd614bc8908264df980a62e1931468vboxsync* Copyright (C) 1996-1999 SciTech Software, Inc.
65fea56f17cd614bc8908264df980a62e1931468vboxsync* Copyright (C) David Mosberger-Tang
65fea56f17cd614bc8908264df980a62e1931468vboxsync* Copyright (C) 1999 Egbert Eich
65fea56f17cd614bc8908264df980a62e1931468vboxsync* ========================================================================
65fea56f17cd614bc8908264df980a62e1931468vboxsync* Permission to use, copy, modify, distribute, and sell this software and
65fea56f17cd614bc8908264df980a62e1931468vboxsync* its documentation for any purpose is hereby granted without fee,
65fea56f17cd614bc8908264df980a62e1931468vboxsync* provided that the above copyright notice appear in all copies and that
65fea56f17cd614bc8908264df980a62e1931468vboxsync* both that copyright notice and this permission notice appear in
65fea56f17cd614bc8908264df980a62e1931468vboxsync* supporting documentation, and that the name of the authors not be used
65fea56f17cd614bc8908264df980a62e1931468vboxsync* in advertising or publicity pertaining to distribution of the software
65fea56f17cd614bc8908264df980a62e1931468vboxsync* without specific, written prior permission. The authors makes no
65fea56f17cd614bc8908264df980a62e1931468vboxsync* representations about the suitability of this software for any purpose.
65fea56f17cd614bc8908264df980a62e1931468vboxsync* It is provided "as is" without express or implied warranty.
65fea56f17cd614bc8908264df980a62e1931468vboxsync* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
65fea56f17cd614bc8908264df980a62e1931468vboxsync* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
65fea56f17cd614bc8908264df980a62e1931468vboxsync* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
65fea56f17cd614bc8908264df980a62e1931468vboxsync* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
65fea56f17cd614bc8908264df980a62e1931468vboxsync* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
65fea56f17cd614bc8908264df980a62e1931468vboxsync* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
65fea56f17cd614bc8908264df980a62e1931468vboxsync* PERFORMANCE OF THIS SOFTWARE.
65fea56f17cd614bc8908264df980a62e1931468vboxsync* ========================================================================
65fea56f17cd614bc8908264df980a62e1931468vboxsync* Language: ANSI C
65fea56f17cd614bc8908264df980a62e1931468vboxsync* Environment: Any
65fea56f17cd614bc8908264df980a62e1931468vboxsync* Developer: Kendall Bennett
65fea56f17cd614bc8908264df980a62e1931468vboxsync* Description: Header file for x86 register definitions.
65fea56f17cd614bc8908264df980a62e1931468vboxsync****************************************************************************/
65fea56f17cd614bc8908264df980a62e1931468vboxsync/*---------------------- Macros and type definitions ----------------------*/
65fea56f17cd614bc8908264df980a62e1931468vboxsync * General EAX, EBX, ECX, EDX type registers. Note that for
65fea56f17cd614bc8908264df980a62e1931468vboxsync * portability, and speed, the issue of byte swapping is not addressed
65fea56f17cd614bc8908264df980a62e1931468vboxsync * in the registers. All registers are stored in the default format
65fea56f17cd614bc8908264df980a62e1931468vboxsync * available on the host machine. The only critical issue is that the
65fea56f17cd614bc8908264df980a62e1931468vboxsync * registers should line up EXACTLY in the same manner as they do in
65fea56f17cd614bc8908264df980a62e1931468vboxsync * the 386. That is:
65fea56f17cd614bc8908264df980a62e1931468vboxsync * EAX & 0xff === AL
65fea56f17cd614bc8908264df980a62e1931468vboxsync * EAX & 0xffff == AX
65fea56f17cd614bc8908264df980a62e1931468vboxsync * etc. The result is that alot of the calculations can then be
65fea56f17cd614bc8908264df980a62e1931468vboxsync * done using the native instruction set fully.
65fea56f17cd614bc8908264df980a62e1931468vboxsynctypedef struct {
65fea56f17cd614bc8908264df980a62e1931468vboxsynctypedef struct {
65fea56f17cd614bc8908264df980a62e1931468vboxsynctypedef struct {
65fea56f17cd614bc8908264df980a62e1931468vboxsync#else /* !__BIG_ENDIAN__ */
65fea56f17cd614bc8908264df980a62e1931468vboxsynctypedef struct {
65fea56f17cd614bc8908264df980a62e1931468vboxsynctypedef struct {
65fea56f17cd614bc8908264df980a62e1931468vboxsynctypedef struct {
65fea56f17cd614bc8908264df980a62e1931468vboxsync#endif /* BIG_ENDIAN */
65fea56f17cd614bc8908264df980a62e1931468vboxsynctypedef union {
65fea56f17cd614bc8908264df980a62e1931468vboxsync * Segment registers here represent the 16 bit quantities
65fea56f17cd614bc8908264df980a62e1931468vboxsync * CS, DS, ES, SS.
65fea56f17cd614bc8908264df980a62e1931468vboxsync#if defined(__sun) && defined(CS) /* avoid conflicts with Solaris sys/regset.h */
65fea56f17cd614bc8908264df980a62e1931468vboxsync/* 8 bit registers */
65fea56f17cd614bc8908264df980a62e1931468vboxsync/* 16 bit registers */
65fea56f17cd614bc8908264df980a62e1931468vboxsync/* 32 bit extended registers */
65fea56f17cd614bc8908264df980a62e1931468vboxsync/* special registers */
65fea56f17cd614bc8908264df980a62e1931468vboxsync/* special registers */
65fea56f17cd614bc8908264df980a62e1931468vboxsync/* special registers */
65fea56f17cd614bc8908264df980a62e1931468vboxsync/* segment registers */
65fea56f17cd614bc8908264df980a62e1931468vboxsync/* flag conditions */
65fea56f17cd614bc8908264df980a62e1931468vboxsync/* 80286 and above always have bit#1 set */
65fea56f17cd614bc8908264df980a62e1931468vboxsync#define F_ALWAYS_ON (0x0002) /* flag bits always on */
65fea56f17cd614bc8908264df980a62e1931468vboxsync * Define a mask for only those flag bits we will ever pass back
65fea56f17cd614bc8908264df980a62e1931468vboxsync * (via PUSHF)
65fea56f17cd614bc8908264df980a62e1931468vboxsync#define F_MSK (FB_CF|FB_PF|FB_AF|FB_ZF|FB_SF|FB_TF|FB_IF|FB_DF|FB_OF)
65fea56f17cd614bc8908264df980a62e1931468vboxsync/* following bits masked in to a 16bit quantity */
65fea56f17cd614bc8908264df980a62e1931468vboxsync#define F_PF_CALC 0x010000 /* PARITY flag has been calced */
65fea56f17cd614bc8908264df980a62e1931468vboxsync#define F_ZF_CALC 0x020000 /* ZERO flag has been calced */
65fea56f17cd614bc8908264df980a62e1931468vboxsync#define F_SF_CALC 0x040000 /* SIGN flag has been calced */
65fea56f17cd614bc8908264df980a62e1931468vboxsync#define F_ALL_CALC 0xff0000 /* All have been calced */
65fea56f17cd614bc8908264df980a62e1931468vboxsync * Emulator machine state.
65fea56f17cd614bc8908264df980a62e1931468vboxsync * Segment usage control.
65fea56f17cd614bc8908264df980a62e1931468vboxsynctypedef struct {
65fea56f17cd614bc8908264df980a62e1931468vboxsync * MODE contains information on:
65fea56f17cd614bc8908264df980a62e1931468vboxsync * REPE prefix 2 bits repe,repne
65fea56f17cd614bc8908264df980a62e1931468vboxsync * SEGMENT overrides 5 bits normal,DS,SS,CS,ES
65fea56f17cd614bc8908264df980a62e1931468vboxsync * Delayed flag set 3 bits (zero, signed, parity)
65fea56f17cd614bc8908264df980a62e1931468vboxsync * reserved 6 bits
65fea56f17cd614bc8908264df980a62e1931468vboxsync * interrupt # 8 bits instruction raised interrupt
65fea56f17cd614bc8908264df980a62e1931468vboxsync * BIOS video segregs 4 bits
65fea56f17cd614bc8908264df980a62e1931468vboxsync * Interrupt Pending 1 bits
65fea56f17cd614bc8908264df980a62e1931468vboxsync * Extern interrupt 1 bits
65fea56f17cd614bc8908264df980a62e1931468vboxsync * Halted 1 bits
65fea56f17cd614bc8908264df980a62e1931468vboxsync volatile int intr; /* mask of pending interrupts */
65fea56f17cd614bc8908264df980a62e1931468vboxsync/****************************************************************************
65fea56f17cd614bc8908264df980a62e1931468vboxsyncStructure maintaining the emulator machine state.
65fea56f17cd614bc8908264df980a62e1931468vboxsyncmem_base - Base real mode memory for the emulator
65fea56f17cd614bc8908264df980a62e1931468vboxsyncmem_size - Size of the real mode memory block for the emulator
65fea56f17cd614bc8908264df980a62e1931468vboxsyncprivate - private data pointer
65fea56f17cd614bc8908264df980a62e1931468vboxsyncx86 - X86 registers
65fea56f17cd614bc8908264df980a62e1931468vboxsync****************************************************************************/
65fea56f17cd614bc8908264df980a62e1931468vboxsynctypedef struct {
65fea56f17cd614bc8908264df980a62e1931468vboxsync/*----------------------------- Global Variables --------------------------*/
65fea56f17cd614bc8908264df980a62e1931468vboxsync/* Global emulator machine state.
65fea56f17cd614bc8908264df980a62e1931468vboxsync * We keep it global to avoid pointer dereferences in the code for speed.
65fea56f17cd614bc8908264df980a62e1931468vboxsync/*-------------------------- Function Prototypes --------------------------*/
65fea56f17cd614bc8908264df980a62e1931468vboxsync/* Function to log information at runtime */
65fea56f17cd614bc8908264df980a62e1931468vboxsync} /* End of "C" linkage for C++ */
65fea56f17cd614bc8908264df980a62e1931468vboxsync#endif /* __X86EMU_REGS_H */