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/*
 * db/i386/i386db.h
 * A debugger.
 * i386-specific header file.
 * i386/mdb.h contains definitions used by machine-independent code.
 * i386/mdbdefs.h defines externals referenced by machine-independent code.
 * i386/i386db.h contains definitions used only by machine-dependent code.
 */

#include "db.h"

/* Macros. */
#define	rup(x)	(((x) + 0xF) & ~0xF)	/* round up to 16-byte boundary */
#define	get_code(nbytes) getb(segn, ibp, (nbytes))

/*
 * Registers from the user area after a core dump.
 * get_regs() reads data to one of these with one getb() call for :r,
 * so the members must correspond to the offsets in <sys/ptrace.h>.
 */
typedef	struct	ureg	{
	ADDR_T	ur_gs;
	ADDR_T	ur_fs;
	ADDR_T	ur_es;
	ADDR_T	ur_ds;
	ADDR_T	ur_di;
	ADDR_T	ur_si;
	ADDR_T	ur_bp;
	ADDR_T	ur_fill;		/* sp */
	ADDR_T	ur_bx;
	ADDR_T	ur_dx;
	ADDR_T	ur_cx;
	ADDR_T	ur_ax;
	ADDR_T	ur_trapno;
	ADDR_T	ur_err;
	ADDR_T	ur_ip;
	ADDR_T	ur_cs;
	ADDR_T	ur_fw;			/* efl */
	ADDR_T	ur_sp;			/* uesp */
	ADDR_T	ur_ss;
	ADDR_T	ur_sig;
	struct	_fpstate ur_fpstate;
} UREG;
#define	UREG_BASE	PTRACE_GS	/* pseudo-offset of ureg base for ptrace() */
#define	UREG_GEN_SIZE	(sizeof(UREG)-sizeof(struct _fpstate))
#define	UREG_ALL_SIZE	(sizeof(UREG))

/*
 * Register names and corresponding ptrace() offsets.
 * The flags are used in printing the register info for :r.
 */
typedef	struct	regname	{
	int	r_flag;
	char	*r_name;
	int	r_offset;
} REGNAME;
#define	NGREGS	16		/* number of general registers */
#define	NREGS	24		/* total number of registers */
#define	RF_16	1		/* 16-bit value */
#define	RF_1632	2		/* 16- or 32-bit value */
#define	RF_NDP	3		/* NDP register */

/*
 * NDP miscellaneous opcode table.
 */
typedef	struct	ndpmtab	{
	int	ndpm_val;		/* 2-byte value */
	char	*ndpm_op;		/* name */
} NDPMTAB;

/*
 * i386 opcodes.
 * Most are needed for the code which plants return breakpoints and
 * prints tracebacks.
 */
#define	ADDSP1	0x83			/* add %esp, $imm byte 1	*/
#define	ADDSP2	0xC4			/* add %esp, $imm byte 2	*/
#define	CALL	0xE8			/* call				*/
#define	ENTER	0xC8			/* enter			*/
#define	ICALL1	0xFF			/* icall byte 1			*/
#define	IC2MSK	0x38			/* icall byte 2 mask (reg)	*/
#define	ICALL2	0x10			/* icall byte 2 (masked)	*/
#define	INT	0xCD			/* int (COH286 syscall)		*/
#define	LCALL	0x9A			/* lcall (COH386 syscall)	*/
#define	LEAVE	0xC9			/* leave			*/
#define	POPECX	0x59			/* pop %ecx			*/
#define	PUSHEBP	0x55			/* push %ebp			*/
#define	PUSHESI	0x56			/* push %esi			*/
#define	TRAP	0xCC			/* int 3			*/

/*
 * Functions.
 * i386/mdbdefs.h defines additional routines
 * which are referenced by machine-independent code.
 */
/* i386db1.c */
extern	int	get_fp_reg	__((struct _fpreg *fpregp, double *dp));
extern	int	get_sized	__((int s, ADDR_T *lp));
extern	ADDR_T	get_sp		__((void));

/* i386db2.c */
extern	int	ad_size		__((void));
extern	int	adj_op_size	__((int c2));
extern	char	*format		__((char *isp, char *dest));
extern	int	genRegIndex	__((int c2));
#if	0
extern	int	get_code	__((int nbytes));
#endif
extern	int	get_modRM	__((void));
extern	int	get_nbytes	__((int mysize));
extern	int	get_sib		__((void));
extern	int	getValData	__((int is_signed, int mysize));
extern	ADDR_T	get_value	__((int mysize, int is_signed, int flag));
extern	int	op_size		__((void));
extern	void	out_addr	__((ADDR_T v));
extern	void	out_disp	__((int fmt, int is_signed, ADDR_T val));
extern	void	out_modRM	__((int dispsize, int fmt, int addrsize, int is_signed));
extern	void	out_modRM16	__((int c2));
extern	void	out_modRM32	__((int c2));
extern	void	output		__((char *src));
extern	void	out_segpre	__((void));
extern	void	out_sib		__((int dispsize, int m));

/*
 * Global symbols.
 * i386/mdbdefs.h defines additional globals
 * which are referenced by machine-independent code.
 */
/* i386db0.c */
extern	int	NDP_flag;		/* NDP instructions are usable	*/
extern	ADDR_T	sys_add;		/* Address of op after syscall	*/
extern	BIN	sys_in;			/* Instruction after sys call	*/
extern	UREG	ureg;			/* Child program registers	*/

/*
 * Tables.
 */
/* i386db0.c */
extern	char	*formtab[4][4];		/* Formats			*/
extern	REGNAME	reg_name[];		/* Register names		*/
#if	0
extern	char	*sysitab[];		/* System calls			*/
#endif
/* i386db3.c */
extern	char	*op_map_1[];		/* Instruction map 1		*/
extern	char	*op_map_2[];		/* Instruction map 2		*/
extern	char	*grp_map[9][8];		/* Instruction groups		*/
extern	char	*NDP_op[8][8];		/* NDP opcode table m!=3	*/
extern	char	*NDP_op_3[8][8];	/* NDP opcode table m==3	*/
extern	NDPMTAB	NDP_misc_op[];		/* NDP misc opcode table m==3	*/
extern	char	*segReg[];		/* Segment registers		*/
extern	char	*genReg[3][8];		/* General registers		*/
extern	char	*ctrlReg[];		/* Control registers		*/
extern	char	*dbgReg[];		/* Debug registers		*/
extern	char	*tstReg[];		/* Test registers		*/
extern	char	*NDPReg[];		/* NDP registers		*/
extern	char	*modRMtab[2][8];	/* modR/M indirect addressing	*/
extern	char	*sibtab[4][8];		/* SIB indexed addressing	*/

/* end of db/i386/i386db.h */

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