Import x86emu from OpenBSD as of OPENBSD_4_6.

1 files changed, 170 insertions, 0 deletions

diff --git a/sys/contrib/x86emu/x86emu_regs.h b/sys/contrib/x86emu/x86emu_regs.h
new file mode 100644
index 0000000..fda2d47a
--- /dev/null
+++ b/sys/contrib/x86emu/x86emu_regs.h
@@ -0,0 +1,170 @@
+/*	$NetBSD: x86emu_regs.h,v 1.1 2007/12/01 20:14:10 joerg Exp $	*/
+/*	$OpenBSD: x86emu_regs.h,v 1.2 2009/06/06 03:45:05 matthieu Exp $ */
+
+/****************************************************************************
+*
+*  Realmode X86 Emulator Library
+*
+*  Copyright (C) 1996-1999 SciTech Software, Inc.
+*  Copyright (C) David Mosberger-Tang
+*  Copyright (C) 1999 Egbert Eich
+*  Copyright (C) 2007 Joerg Sonnenberger
+*
+*  ========================================================================
+*
+*  Permission to use, copy, modify, distribute, and sell this software and
+*  its documentation for any purpose is hereby granted without fee,
+*  provided that the above copyright notice appear in all copies and that
+*  both that copyright notice and this permission notice appear in
+*  supporting documentation, and that the name of the authors not be used
+*  in advertising or publicity pertaining to distribution of the software
+*  without specific, written prior permission.  The authors makes no
+*  representations about the suitability of this software for any purpose.
+*  It is provided "as is" without express or implied warranty.
+*
+*  THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+*  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+*  EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+*  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+*  USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+*  OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+*  PERFORMANCE OF THIS SOFTWARE.
+*
+****************************************************************************/
+
+#ifndef __X86EMU_REGS_H
+#define __X86EMU_REGS_H
+
+/*---------------------- Macros and type definitions ----------------------*/
+
+/* 8 bit registers */
+#define R_AH  register_a.I8_reg.h_reg
+#define R_AL  register_a.I8_reg.l_reg
+#define R_BH  register_b.I8_reg.h_reg
+#define R_BL  register_b.I8_reg.l_reg
+#define R_CH  register_c.I8_reg.h_reg
+#define R_CL  register_c.I8_reg.l_reg
+#define R_DH  register_d.I8_reg.h_reg
+#define R_DL  register_d.I8_reg.l_reg
+
+/* 16 bit registers */
+#define R_AX  register_a.I16_reg.x_reg
+#define R_BX  register_b.I16_reg.x_reg
+#define R_CX  register_c.I16_reg.x_reg
+#define R_DX  register_d.I16_reg.x_reg
+
+/* 32 bit extended registers */
+#define R_EAX  register_a.I32_reg.e_reg
+#define R_EBX  register_b.I32_reg.e_reg
+#define R_ECX  register_c.I32_reg.e_reg
+#define R_EDX  register_d.I32_reg.e_reg
+
+/* special registers */
+#define R_SP  register_sp.I16_reg.x_reg
+#define R_BP  register_bp.I16_reg.x_reg
+#define R_SI  register_si.I16_reg.x_reg
+#define R_DI  register_di.I16_reg.x_reg
+#define R_IP  register_ip.I16_reg.x_reg
+#define R_FLG register_flags
+
+/* special registers */
+#define R_ESP  register_sp.I32_reg.e_reg
+#define R_EBP  register_bp.I32_reg.e_reg
+#define R_ESI  register_si.I32_reg.e_reg
+#define R_EDI  register_di.I32_reg.e_reg
+#define R_EIP  register_ip.I32_reg.e_reg
+#define R_EFLG register_flags
+
+/* segment registers */
+#define R_CS  register_cs
+#define R_DS  register_ds
+#define R_SS  register_ss
+#define R_ES  register_es
+#define R_FS  register_fs
+#define R_GS  register_gs
+
+/* flag conditions   */
+#define FB_CF 0x0001            /* CARRY flag  */
+#define FB_PF 0x0004            /* PARITY flag */
+#define FB_AF 0x0010            /* AUX  flag   */
+#define FB_ZF 0x0040            /* ZERO flag   */
+#define FB_SF 0x0080            /* SIGN flag   */
+#define FB_TF 0x0100            /* TRAP flag   */
+#define FB_IF 0x0200            /* INTERRUPT ENABLE flag */
+#define FB_DF 0x0400            /* DIR flag    */
+#define FB_OF 0x0800            /* OVERFLOW flag */
+
+/* 80286 and above always have bit#1 set */
+#define F_ALWAYS_ON  (0x0002)   /* flag bits always on */
+
+/*
+ * Define a mask for only those flag bits we will ever pass back 
+ * (via PUSHF) 
+ */
+#define F_MSK (FB_CF|FB_PF|FB_AF|FB_ZF|FB_SF|FB_TF|FB_IF|FB_DF|FB_OF)
+
+/* following bits masked in to a 16bit quantity */
+
+#define F_CF 0x0001             /* CARRY flag  */
+#define F_PF 0x0004             /* PARITY flag */
+#define F_AF 0x0010             /* AUX  flag   */
+#define F_ZF 0x0040             /* ZERO flag   */
+#define F_SF 0x0080             /* SIGN flag   */
+#define F_TF 0x0100             /* TRAP flag   */
+#define F_IF 0x0200             /* INTERRUPT ENABLE flag */
+#define F_DF 0x0400             /* DIR flag    */
+#define F_OF 0x0800             /* OVERFLOW flag */
+
+#define SET_FLAG(flag)        	(emu->x86.R_FLG |= (flag))
+#define CLEAR_FLAG(flag)      	(emu->x86.R_FLG &= ~(flag))
+#define ACCESS_FLAG(flag)     	(emu->x86.R_FLG & (flag))
+#define CLEARALL_FLAG(m)    	(emu->x86.R_FLG = 0)
+
+#define CONDITIONAL_SET_FLAG(COND,FLAG) \
+  if (COND) SET_FLAG(FLAG); else CLEAR_FLAG(FLAG)
+
+#define F_PF_CALC 0x010000      /* PARITY flag has been calced    */
+#define F_ZF_CALC 0x020000      /* ZERO flag has been calced      */
+#define F_SF_CALC 0x040000      /* SIGN flag has been calced      */
+
+#define F_ALL_CALC      0xff0000        /* All have been calced   */
+
+/*
+ * Emulator machine state.
+ * Segment usage control.
+ */
+#define SYSMODE_SEG_DS_SS       0x00000001
+#define SYSMODE_SEGOVR_CS       0x00000002
+#define SYSMODE_SEGOVR_DS       0x00000004
+#define SYSMODE_SEGOVR_ES       0x00000008
+#define SYSMODE_SEGOVR_FS       0x00000010
+#define SYSMODE_SEGOVR_GS       0x00000020
+#define SYSMODE_SEGOVR_SS       0x00000040
+#define SYSMODE_PREFIX_REPE     0x00000080
+#define SYSMODE_PREFIX_REPNE    0x00000100
+#define SYSMODE_PREFIX_DATA     0x00000200
+#define SYSMODE_PREFIX_ADDR     0x00000400
+#define SYSMODE_INTR_PENDING    0x10000000
+#define SYSMODE_EXTRN_INTR      0x20000000
+#define SYSMODE_HALTED          0x40000000
+
+#define SYSMODE_SEGMASK (SYSMODE_SEG_DS_SS      | \
+						 SYSMODE_SEGOVR_CS      | \
+						 SYSMODE_SEGOVR_DS      | \
+						 SYSMODE_SEGOVR_ES      | \
+						 SYSMODE_SEGOVR_FS      | \
+						 SYSMODE_SEGOVR_GS      | \
+						 SYSMODE_SEGOVR_SS)
+#define SYSMODE_CLRMASK (SYSMODE_SEG_DS_SS      | \
+						 SYSMODE_SEGOVR_CS      | \
+						 SYSMODE_SEGOVR_DS      | \
+						 SYSMODE_SEGOVR_ES      | \
+						 SYSMODE_SEGOVR_FS      | \
+						 SYSMODE_SEGOVR_GS      | \
+						 SYSMODE_SEGOVR_SS      | \
+						 SYSMODE_PREFIX_DATA    | \
+						 SYSMODE_PREFIX_ADDR)
+
+#define  INTR_SYNCH           0x1
+
+#endif /* __X86EMU_REGS_H */