20060303

1 files changed, 1850 insertions, 0 deletions

diff --git a/utils/libmach/8db.c b/utils/libmach/8db.c
new file mode 100644
index 00000000..86b6e1f2
--- /dev/null
+++ b/utils/libmach/8db.c
@@ -0,0 +1,1850 @@
+#include <lib9.h>
+#include <bio.h>
+#include "mach.h"
+
+/*
+ * i386-specific debugger interface
+ */
+
+static	char	*i386excep(Map*, Rgetter);
+
+static	int	i386trace(Map*, ulong, ulong, ulong, Tracer);
+static	ulong	i386frame(Map*, ulong, ulong, ulong, ulong);
+static	int	i386foll(Map*, ulong, Rgetter, ulong*);
+static	int	i386inst(Map*, ulong, char, char*, int);
+static	int	i386das(Map*, ulong, char*, int);
+static	int	i386instlen(Map*, ulong);
+
+static	char	STARTSYM[] =	"_main";
+static	char	PROFSYM[] =	"_mainp";
+static	char	FRAMENAME[] =	".frame";
+static char *excname[] =
+{
+	"divide error",			/* 0 */
+	"debug exception",		/* 1 */
+	0,0,				/* 2, 3 */
+	"overflow",			/* 4 */
+	"bounds check",			/* 5 */
+	"invalid opcode",		/* 6 */
+	"math coprocessor emulation",	/* 7 */
+	"double fault",			/* 8 */
+	"math coprocessor overrun",	/* 9 */
+	"invalid TSS",			/* 10 */
+	"segment not present",		/* 11 */
+	"stack exception",		/* 12 */
+	"general protection violation",	/* 13 */
+	"page fault",			/* 14 */
+	0,				/* 15 */
+	"math coprocessor error",	/* 16 */
+	0,0,0,0,0,0,0,			/* 17-23 */
+	"clock",			/* 24 */
+	"keyboard",			/* 25 */
+	0,				/* 26 */
+	"modem status",			/* 27 */
+	"serial line status",		/* 28 */
+	0,				/* 29 */
+	"floppy disk",			/* 30 */
+	0,0,0,0,0,			/* 31-35 */
+	"mouse",			/* 36 */
+	"math coprocessor",		/* 37 */
+	"hard disk",			/* 38 */
+	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,/* 39-54 */
+	0,0,0,0,0,0,0,0,0,		/* 55-63 */
+	"system call",			/* 64 */
+};
+
+Machdata i386mach =
+{
+	{0xCC, 0, 0, 0},	/* break point: INT 3 */
+	1,			/* break point size */
+
+	leswab,			/* convert short to local byte order */
+	leswal,			/* convert long to local byte order */
+	leswav,			/* convert vlong to local byte order */
+	i386trace,		/* C traceback */
+	i386frame,		/* frame finder */
+	i386excep,		/* print exception */
+	0,			/* breakpoint fixup */
+	leieeesftos,		/* single precision float printer */
+	leieeedftos,		/* double precision float printer */
+	i386foll,		/* following addresses */
+	i386inst,		/* print instruction */
+	i386das,		/* dissembler */
+	i386instlen,		/* instruction size calculation */
+};
+
+static char*
+i386excep(Map *map, Rgetter rget)
+{
+	ulong c;
+	ulong pc;
+	static char buf[16];
+
+	c = (*rget)(map, "TRAP");
+	if(c > 64 || excname[c] == 0) {
+		if (c == 3) {
+			pc = (*rget)(map, "PC");
+			if (get1(map, pc, (uchar*)buf, machdata->bpsize) > 0)
+			if (memcmp(buf, machdata->bpinst, machdata->bpsize) == 0)
+				return "breakpoint";
+		}
+		sprint(buf, "exception %ld", c);
+		return buf;
+	} else
+		return excname[c];
+}
+
+static int
+i386trace(Map *map, ulong pc, ulong sp, ulong link, Tracer trace)
+{
+	int i;
+	ulong osp;
+	Symbol s, f;
+
+	USED(link);
+	i = 0;
+	osp = 0;
+	while(findsym(pc, CTEXT, &s)) {
+		if (osp == sp)
+			break;
+		osp = sp;
+
+		if(strcmp(STARTSYM, s.name) == 0 || strcmp(PROFSYM, s.name) == 0)
+			break;
+
+		if(pc != s.value) {	/* not at first instruction */
+			if(findlocal(&s, FRAMENAME, &f) == 0)
+				break;
+			sp += f.value-mach->szaddr;
+		}
+
+		if (get4(map, sp, (long *) &pc) < 0)
+			break;
+
+		if(pc == 0)
+			break;
+
+		(*trace)(map, pc, sp, &s);
+		sp += mach->szaddr;
+
+		if(++i > 40)
+			break;
+	}
+	return i;
+}
+
+static ulong
+i386frame(Map *map, ulong addr, ulong pc, ulong sp, ulong link)
+{
+	Symbol s, f;
+
+	USED(link);
+	while (findsym(pc, CTEXT, &s)) {
+		if(strcmp(STARTSYM, s.name) == 0 || strcmp(PROFSYM, s.name) == 0)
+			break;
+
+		if(pc != s.value) {	/* not first instruction */
+			if(findlocal(&s, FRAMENAME, &f) == 0)
+				break;
+			sp += f.value-mach->szaddr;
+		}
+
+		if (s.value == addr)
+			return sp;
+
+		if (get4(map, sp, (long *)&pc) < 0)
+			break;
+		sp += mach->szaddr;
+	}
+	return 0;
+}
+
+	/* I386/486 - Disassembler and related functions */
+
+/*
+ *  an instruction
+ */
+typedef struct Instr Instr;
+struct	Instr
+{
+	uchar	mem[1+1+1+1+2+1+1+4+4];		/* raw instruction */
+	ulong	addr;		/* address of start of instruction */
+	int	n;		/* number of bytes in instruction */
+	char	*prefix;	/* instr prefix */
+	char	*segment;	/* segment override */
+	uchar	jumptype;	/* set to the operand type for jump/ret/call */
+	char	osize;		/* 'W' or 'L' */
+	char	asize;		/* address size 'W' or 'L' */
+	uchar	mod;		/* bits 6-7 of mod r/m field */
+	uchar	reg;		/* bits 3-5 of mod r/m field */
+	char	ss;		/* bits 6-7 of SIB */
+	char	index;		/* bits 3-5 of SIB */
+	char	base;		/* bits 0-2 of SIB */
+	short	seg;		/* segment of far address */
+	ulong	disp;		/* displacement */
+	ulong 	imm;		/* immediate */
+	ulong 	imm2;		/* second immediate operand */
+	char	*curr;		/* fill level in output buffer */
+	char	*end;		/* end of output buffer */
+	char	*err;		/* error message */
+};
+
+	/* 386 register (ha!) set */
+enum{
+	AX=0,
+	CX,
+	DX,
+	BX,
+	SP,
+	BP,
+	SI,
+	DI,
+};
+	/* Operand Format codes */
+/*
+%A	-	address size register modifier (!asize -> 'E')
+%C	-	Control register CR0/CR1/CR2
+%D	-	Debug register DR0/DR1/DR2/DR3/DR6/DR7
+%I	-	second immediate operand
+%O	-	Operand size register modifier (!osize -> 'E')
+%T	-	Test register TR6/TR7
+%S	-	size code ('W' or 'L')
+%X	-	Weird opcode: OSIZE == 'W' => "CBW"; else => "CWDE"
+%d	-	displacement 16-32 bits
+%e	-	effective address - Mod R/M value
+%f	-	floating point register F0-F7 - from Mod R/M register
+%g	-	segment register
+%i	-	immediate operand 8-32 bits
+%p	-	PC-relative - signed displacement in immediate field
+%r	-	Reg from Mod R/M
+%x	-	Weird opcode: OSIZE == 'W' => "CWD"; else => "CDQ"
+*/
+
+typedef struct Optable Optable;
+struct Optable
+{
+	char	operand[2];
+	void	*proto;		/* actually either (char*) or (Optable*) */
+};
+	/* Operand decoding codes */
+enum {
+	Ib = 1,			/* 8-bit immediate - (no sign extension)*/
+	Ibs,			/* 8-bit immediate (sign extended) */
+	Jbs,			/* 8-bit sign-extended immediate in jump or call */
+	Iw,			/* 16-bit immediate -> imm */
+	Iw2,			/* 16-bit immediate -> imm2 */
+	Iwd,			/* Operand-sized immediate (no sign extension)*/
+	Awd,			/* Address offset */
+	Iwds,			/* Operand-sized immediate (sign extended) */
+	RM,			/* Word or long R/M field with register (/r) */
+	RMB,			/* Byte R/M field with register (/r) */
+	RMOP,			/* Word or long R/M field with op code (/digit) */
+	RMOPB,			/* Byte R/M field with op code (/digit) */
+	RMR,			/* R/M register only (mod = 11) */
+	RMM,			/* R/M memory only (mod = 0/1/2) */
+	R0,			/* Base reg of Mod R/M is literal 0x00 */
+	R1,			/* Base reg of Mod R/M is literal 0x01 */
+	FRMOP,			/* Floating point R/M field with opcode */
+	FRMEX,			/* Extended floating point R/M field with opcode */
+	JUMP,			/* Jump or Call flag - no operand */
+	RET,			/* Return flag - no operand */
+	OA,			/* literal 0x0a byte */
+	PTR,			/* Seg:Displacement addr (ptr16:16 or ptr16:32) */
+	AUX,			/* Multi-byte op code - Auxiliary table */
+	PRE,			/* Instr Prefix */
+	SEG,			/* Segment Prefix */
+	OPOVER,			/* Operand size override */
+	ADDOVER,		/* Address size override */
+};
+	
+static Optable optab0F00[8]=
+{
+	0,0,		"MOVW	LDT,%e",	/* 0x00 */
+	0,0,		"MOVW	TR,%e",		/* 0x01 */
+	0,0,		"MOVW	%e,LDT",	/* 0x02 */
+	0,0,		"MOVW	%e,TR",		/* 0x03 */
+	0,0,		"VERR	%e",		/* 0x04 */
+	0,0,		"VERW	%e",		/* 0x05 */
+};
+
+static Optable optab0F01[8]=
+{
+	0,0,		"MOVL	GDTR,%e",	/* 0x00 */
+	0,0,		"MOVL	IDTR,%e",	/* 0x01 */
+	0,0,		"MOVL	%e,GDTR",	/* 0x02 */
+	0,0,		"MOVL	%e,IDTR",	/* 0x03 */
+	0,0,		"MOVW	MSW,%e",	/* 0x04 */	/* word */
+	0,0,		"",			/* 0x05 */
+	0,0,		"MOVW	%e,MSW",	/* 0x06 */	/* word */
+};
+
+static Optable optab0FBA[8]=
+{
+	0,0,		"",			/* 0x00 */
+	0,0,		"",			/* 0x01 */
+	0,0,		"",			/* 0x02 */
+	0,0,		"",			/* 0x03 */
+	Ib,0,		"BT%S	%i,%e",		/* 0x04 */
+	Ib,0,		"BTS%S	%i,%e",		/* 0x05 */
+	Ib,0,		"BTR%S	%i,%e",		/* 0x06 */
+	Ib,0,		"BTC%S	%i,%e",		/* 0x07 */
+};
+
+static Optable optab0F[256]=
+{
+	RMOP,0,		optab0F00,		/* 0x00 */
+	RMOP,0,		optab0F01,		/* 0x01 */
+	RM,0,		"LAR	%e,%r",		/* 0x02 */
+	RM,0,		"LSL	%e,%r",		/* 0x03 */
+	0,0,		"",			/* 0x04 */
+	0,0,		"",			/* 0x05 */
+	0,0,		"CLTS",			/* 0x06 */
+	0,0,		"",			/* 0x07 */
+	0,0,		"INVD",			/* 0x08 */
+	0,0,		"WBINVD",		/* 0x09 */
+	0,0,		"",			/* 0x0a */
+	0,0,		"",			/* 0x0b */
+	0,0,		"",			/* 0x0c */
+	0,0,		"",			/* 0x0d */
+	0,0,		"",			/* 0x0e */
+	0,0,		"",			/* 0x0f */
+	0,0,		"",			/* 0x10 */
+	0,0,		"",			/* 0x11 */
+	0,0,		"",			/* 0x12 */
+	0,0,		"",			/* 0x13 */
+	0,0,		"",			/* 0x14 */
+	0,0,		"",			/* 0x15 */
+	0,0,		"",			/* 0x16 */
+	0,0,		"",			/* 0x17 */
+	0,0,		"",			/* 0x18 */
+	0,0,		"",			/* 0x19 */
+	0,0,		"",			/* 0x1a */
+	0,0,		"",			/* 0x1b */
+	0,0,		"",			/* 0x1c */
+	0,0,		"",			/* 0x1d */
+	0,0,		"",			/* 0x1e */
+	0,0,		"",			/* 0x1f */
+	RMR,0,		"MOVL	%C,%e",		/* 0x20 */
+	RMR,0,		"MOVL	%D,%e",		/* 0x21 */
+	RMR,0,		"MOVL	%e,%C",		/* 0x22 */
+	RMR,0,		"MOVL	%e,%D",		/* 0x23 */
+	RMR,0,		"MOVL	%T,%e",		/* 0x24 */
+	0,0,		"",			/* 0x25 */
+	RMR,0,		"MOVL	%e,%T",		/* 0x26 */
+	0,0,		"",			/* 0x27 */
+	0,0,		"",			/* 0x28 */
+	0,0,		"",			/* 0x29 */
+	0,0,		"",			/* 0x2a */
+	0,0,		"",			/* 0x2b */
+	0,0,		"",			/* 0x2c */
+	0,0,		"",			/* 0x2d */
+	0,0,		"",			/* 0x2e */
+	0,0,		"",			/* 0x2f */
+	0,0,		"WRMSR",		/* 0x30 */
+	0,0,		"RDTSC",		/* 0x31 */
+	0,0,		"RDMSR",		/* 0x32 */
+	0,0,		"",			/* 0x33 */
+	0,0,		"",			/* 0x34 */
+	0,0,		"",			/* 0x35 */
+	0,0,		"",			/* 0x36 */
+	0,0,		"",			/* 0x37 */
+	0,0,		"",			/* 0x38 */
+	0,0,		"",			/* 0x39 */
+	0,0,		"",			/* 0x3a */
+	0,0,		"",			/* 0x3b */
+	0,0,		"",			/* 0x3c */
+	0,0,		"",			/* 0x3d */
+	0,0,		"",			/* 0x3e */
+	0,0,		"",			/* 0x3f */
+	0,0,		"",			/* 0x40 */
+	0,0,		"",			/* 0x41 */
+	0,0,		"",			/* 0x42 */
+	0,0,		"",			/* 0x43 */
+	0,0,		"",			/* 0x44 */
+	0,0,		"",			/* 0x45 */
+	0,0,		"",			/* 0x46 */
+	0,0,		"",			/* 0x47 */
+	0,0,		"",			/* 0x48 */
+	0,0,		"",			/* 0x49 */
+	0,0,		"",			/* 0x4a */
+	0,0,		"",			/* 0x4b */
+	0,0,		"",			/* 0x4c */
+	0,0,		"",			/* 0x4d */
+	0,0,		"",			/* 0x4e */
+	0,0,		"",			/* 0x4f */
+	0,0,		"",			/* 0x50 */
+	0,0,		"",			/* 0x51 */
+	0,0,		"",			/* 0x52 */
+	0,0,		"",			/* 0x53 */
+	0,0,		"",			/* 0x54 */
+	0,0,		"",			/* 0x55 */
+	0,0,		"",			/* 0x56 */
+	0,0,		"",			/* 0x57 */
+	0,0,		"",			/* 0x58 */
+	0,0,		"",			/* 0x59 */
+	0,0,		"",			/* 0x5a */
+	0,0,		"",			/* 0x5b */
+	0,0,		"",			/* 0x5c */
+	0,0,		"",			/* 0x5d */
+	0,0,		"",			/* 0x5e */
+	0,0,		"",			/* 0x5f */
+	0,0,		"",			/* 0x60 */
+	0,0,		"",			/* 0x61 */
+	0,0,		"",			/* 0x62 */
+	0,0,		"",			/* 0x63 */
+	0,0,		"",			/* 0x64 */
+	0,0,		"",			/* 0x65 */
+	0,0,		"",			/* 0x66 */
+	0,0,		"",			/* 0x67 */
+	0,0,		"",			/* 0x68 */
+	0,0,		"",			/* 0x69 */
+	0,0,		"",			/* 0x6a */
+	0,0,		"",			/* 0x6b */
+	0,0,		"",			/* 0x6c */
+	0,0,		"",			/* 0x6d */
+	0,0,		"",			/* 0x6e */
+	0,0,		"",			/* 0x6f */
+	0,0,		"",			/* 0x70 */
+	0,0,		"",			/* 0x71 */
+	0,0,		"",			/* 0x72 */
+	0,0,		"",			/* 0x73 */
+	0,0,		"",			/* 0x74 */
+	0,0,		"",			/* 0x75 */
+	0,0,		"",			/* 0x76 */
+	0,0,		"",			/* 0x77 */
+	0,0,		"",			/* 0x78 */
+	0,0,		"",			/* 0x79 */
+	0,0,		"",			/* 0x7a */
+	0,0,		"",			/* 0x7b */
+	0,0,		"",			/* 0x7c */
+	0,0,		"",			/* 0x7d */
+	0,0,		"",			/* 0x7e */
+	0,0,		"",			/* 0x7f */
+	Iwds,0,		"JOS	%p",		/* 0x80 */
+	Iwds,0,		"JOC	%p",		/* 0x81 */
+	Iwds,0,		"JCS	%p",		/* 0x82 */
+	Iwds,0,		"JCC	%p",		/* 0x83 */
+	Iwds,0,		"JEQ	%p",		/* 0x84 */
+	Iwds,0,		"JNE	%p",		/* 0x85 */
+	Iwds,0,		"JLS	%p",		/* 0x86 */
+	Iwds,0,		"JHI	%p",		/* 0x87 */
+	Iwds,0,		"JMI	%p",		/* 0x88 */
+	Iwds,0,		"JPL	%p",		/* 0x89 */
+	Iwds,0,		"JPS	%p",		/* 0x8a */
+	Iwds,0,		"JPC	%p",		/* 0x8b */
+	Iwds,0,		"JLT	%p",		/* 0x8c */
+	Iwds,0,		"JGE	%p",		/* 0x8d */
+	Iwds,0,		"JLE	%p",		/* 0x8e */
+	Iwds,0,		"JGT	%p",		/* 0x8f */
+	RMB,0,		"SETOS	%e",		/* 0x90 */
+	RMB,0,		"SETOC	%e",		/* 0x91 */
+	RMB,0,		"SETCS	%e",		/* 0x92 */
+	RMB,0,		"SETCC	%e",		/* 0x93 */
+	RMB,0,		"SETEQ	%e",		/* 0x94 */
+	RMB,0,		"SETNE	%e",		/* 0x95 */
+	RMB,0,		"SETLS	%e",		/* 0x96 */
+	RMB,0,		"SETHI	%e",		/* 0x97 */
+	RMB,0,		"SETMI	%e",		/* 0x98 */
+	RMB,0,		"SETPL	%e",		/* 0x99 */
+	RMB,0,		"SETPS	%e",		/* 0x9a */
+	RMB,0,		"SETPC	%e",		/* 0x9b */
+	RMB,0,		"SETLT	%e",		/* 0x9c */
+	RMB,0,		"SETGE	%e",		/* 0x9d */
+	RMB,0,		"SETLE	%e",		/* 0x9e */
+	RMB,0,		"SETGT	%e",		/* 0x9f */
+	0,0,		"PUSHL	FS",		/* 0xa0 */
+	0,0,		"POPL	FS",		/* 0xa1 */
+	0,0,		"CPUID",		/* 0xa2 */
+	RM,0,		"BT%S	%r,%e",		/* 0xa3 */
+	RM,Ib,		"SHLD%S	%r,%i,%e",	/* 0xa4 */
+	RM,0,		"SHLD%S	%r,CL,%e",	/* 0xa5 */
+	0,0,		"",			/* 0xa6 */
+	0,0,		"",			/* 0xa7 */
+	0,0,		"PUSHL	GS",		/* 0xa8 */
+	0,0,		"POPL	GS",		/* 0xa9 */
+	0,0,		"",			/* 0xaa */
+	RM,0,		"BTS%S	%r,%e",		/* 0xab */
+	RM,Ib,		"SHRD%S	%r,%i,%e",	/* 0xac */
+	RM,0,		"SHRD%S	%r,CL,%e",	/* 0xad */
+	0,0,		"",			/* 0xae */
+	RM,0,		"IMUL%S	%e,%r",		/* 0xaf */
+	0,0,		"",			/* 0xb0 */
+	0,0,		"",			/* 0xb1 */
+	RMM,0,		"LSS	%e,%r",		/* 0xb2 */
+	RM,0,		"BTR%S	%r,%e",		/* 0xb3 */
+	RMM,0,		"LFS	%e,%r",		/* 0xb4 */
+	RMM,0,		"LGS	%e,%r",		/* 0xb5 */
+	RMB,0,		"MOVBZX	%e,%R",		/* 0xb6 */
+	RM,0,		"MOVWZX	%e,%R",		/* 0xb7 */
+	0,0,		"",			/* 0xb8 */
+	0,0,		"",			/* 0xb9 */
+	RMOP,0,		optab0FBA,		/* 0xba */
+	RM,0,		"BTC%S	%e,%r",		/* 0xbb */
+	RM,0,		"BSF%S	%e,%r",		/* 0xbc */
+	RM,0,		"BSR%S	%e,%r",		/* 0xbd */
+	RMB,0,		"MOVBSX	%e,%R",		/* 0xbe */
+	RM,0,		"MOVWSX	%e,%R",		/* 0xbf */
+};
+
+static Optable optab80[8]=
+{
+	Ib,0,		"ADDB	%i,%e",		/* 0x00 */
+	Ib,0,		"ORB	%i,%e",		/* 0x01 */
+	Ib,0,		"ADCB	%i,%e",		/* 0x02 */
+	Ib,0,		"SBBB	%i,%e",		/* 0x03 */
+	Ib,0,		"ANDB	%i,%e",		/* 0x04 */
+	Ib,0,		"SUBB	%i,%e",		/* 0x05 */
+	Ib,0,		"XORB	%i,%e",		/* 0x06 */
+	Ib,0,		"CMPB	%e,%i",		/* 0x07 */
+};
+
+static Optable optab81[8]=
+{
+	Iwd,0,		"ADD%S	%i,%e",		/* 0x00 */
+	Iwd,0,		"OR%S	%i,%e",		/* 0x01 */
+	Iwd,0,		"ADC%S	%i,%e",		/* 0x02 */
+	Iwd,0,		"SBB%S	%i,%e",		/* 0x03 */
+	Iwd,0,		"AND%S	%i,%e",		/* 0x04 */
+	Iwd,0,		"SUB%S	%i,%e",		/* 0x05 */
+	Iwd,0,		"XOR%S	%i,%e",		/* 0x06 */
+	Iwd,0,		"CMP%S	%e,%i",		/* 0x07 */
+};
+
+static Optable optab83[8]=
+{
+	Ibs,0,		"ADD%S	%i,%e",		/* 0x00 */
+	Ibs,0,		"OR%S	%i,%e",		/* 0x01 */
+	Ibs,0,		"ADC%S	%i,%e",		/* 0x02 */
+	Ibs,0,		"SBB%S	%i,%e",		/* 0x03 */
+	Ibs,0,		"AND%S	%i,%e",		/* 0x04 */
+	Ibs,0,		"SUB%S	%i,%e",		/* 0x05 */
+	Ibs,0,		"XOR%S	%i,%e",		/* 0x06 */
+	Ibs,0,		"CMP%S	%e,%i",		/* 0x07 */
+};
+
+static Optable optabC0[8] =
+{
+	Ib,0,		"ROLB	%i,%e",		/* 0x00 */
+	Ib,0,		"RORB	%i,%e",		/* 0x01 */
+	Ib,0,		"RCLB	%i,%e",		/* 0x02 */
+	Ib,0,		"RCRB	%i,%e",		/* 0x03 */
+	Ib,0,		"SHLB	%i,%e",		/* 0x04 */
+	Ib,0,		"SHRB	%i,%e",		/* 0x05 */
+	0,0,		"",			/* 0x06 */
+	Ib,0,		"SARB	%i,%e",		/* 0x07 */
+};
+
+static Optable optabC1[8] =
+{
+	Ib,0,		"ROL%S	%i,%e",		/* 0x00 */
+	Ib,0,		"ROR%S	%i,%e",		/* 0x01 */
+	Ib,0,		"RCL%S	%i,%e",		/* 0x02 */
+	Ib,0,		"RCR%S	%i,%e",		/* 0x03 */
+	Ib,0,		"SHL%S	%i,%e",		/* 0x04 */
+	Ib,0,		"SHR%S	%i,%e",		/* 0x05 */
+	0,0,		"",			/* 0x06 */
+	Ib,0,		"SAR%S	%i,%e",		/* 0x07 */
+};
+
+static Optable optabD0[8] =
+{
+	0,0,		"ROLB	%e",		/* 0x00 */
+	0,0,		"RORB	%e",		/* 0x01 */
+	0,0,		"RCLB	%e",		/* 0x02 */
+	0,0,		"RCRB	%e",		/* 0x03 */
+	0,0,		"SHLB	%e",		/* 0x04 */
+	0,0,		"SHRB	%e",		/* 0x05 */
+	0,0,		"",			/* 0x06 */
+	0,0,		"SARB	%e",		/* 0x07 */
+};
+
+static Optable optabD1[8] =
+{
+	0,0,		"ROL%S	%e",		/* 0x00 */
+	0,0,		"ROR%S	%e",		/* 0x01 */
+	0,0,		"RCL%S	%e",		/* 0x02 */
+	0,0,		"RCR%S	%e",		/* 0x03 */
+	0,0,		"SHL%S	%e",		/* 0x04 */
+	0,0,		"SHR%S	%e",		/* 0x05 */
+	0,0,		"",			/* 0x06 */
+	0,0,		"SAR%S	%e",		/* 0x07 */
+};
+
+static Optable optabD2[8] =
+{
+	0,0,		"ROLB	CL,%e",		/* 0x00 */
+	0,0,		"RORB	CL,%e",		/* 0x01 */
+	0,0,		"RCLB	CL,%e",		/* 0x02 */
+	0,0,		"RCRB	CL,%e",		/* 0x03 */
+	0,0,		"SHLB	CL,%e",		/* 0x04 */
+	0,0,		"SHRB	CL,%e",		/* 0x05 */
+	0,0,		"",			/* 0x06 */
+	0,0,		"SARB	CL,%e",		/* 0x07 */
+};
+
+static Optable optabD3[8] =
+{
+	0,0,		"ROL%S	CL,%e",		/* 0x00 */
+	0,0,		"ROR%S	CL,%e",		/* 0x01 */
+	0,0,		"RCL%S	CL,%e",		/* 0x02 */
+	0,0,		"RCR%S	CL,%e",		/* 0x03 */
+	0,0,		"SHL%S	CL,%e",		/* 0x04 */
+	0,0,		"SHR%S	CL,%e",		/* 0x05 */
+	0,0,		"",			/* 0x06 */
+	0,0,		"SAR%S	CL,%e",		/* 0x07 */
+};
+
+static Optable optabD8[8+8] =
+{
+	0,0,		"FADDF	%e,F0",		/* 0x00 */
+	0,0,		"FMULF	%e,F0",		/* 0x01 */
+	0,0,		"FCOMF	%e,F0",		/* 0x02 */
+	0,0,		"FCOMFP	%e,F0",		/* 0x03 */
+	0,0,		"FSUBF	%e,F0",		/* 0x04 */
+	0,0,		"FSUBRF	%e,F0",		/* 0x05 */
+	0,0,		"FDIVF	%e,F0",		/* 0x06 */
+	0,0,		"FDIVRF	%e,F0",		/* 0x07 */
+	0,0,		"FADDD	%f,F0",		/* 0x08 */
+	0,0,		"FMULD	%f,F0",		/* 0x09 */
+	0,0,		"FCOMD	%f,F0",		/* 0x0a */
+	0,0,		"FCOMPD	%f,F0",		/* 0x0b */
+	0,0,		"FSUBD	%f,F0",		/* 0x0c */
+	0,0,		"FSUBRD	%f,F0",		/* 0x0d */
+	0,0,		"FDIVD	%f,F0",		/* 0x0e */
+	0,0,		"FDIVRD	%f,F0",		/* 0x0f */
+};
+/*
+ *	optabD9 and optabDB use the following encoding: 
+ *	if (0 <= modrm <= 2) instruction = optabDx[modrm&0x07];
+ *	else instruction = optabDx[(modrm&0x3f)+8];
+ *
+ *	the instructions for MOD == 3, follow the 8 instructions
+ *	for the other MOD values stored at the front of the table.
+ */
+static Optable optabD9[64+8] =
+{
+	0,0,		"FMOVF	%e,F0",		/* 0x00 */
+	0,0,		"",			/* 0x01 */
+	0,0,		"FMOVF	F0,%e",		/* 0x02 */
+	0,0,		"FMOVFP	F0,%e",		/* 0x03 */
+	0,0,		"FLDENV%S %e",		/* 0x04 */
+	0,0,		"FLDCW	%e",		/* 0x05 */
+	0,0,		"FSTENV%S %e",		/* 0x06 */
+	0,0,		"FSTCW	%e",		/* 0x07 */
+	0,0,		"FMOVD	F0,F0",		/* 0x08 */	/* Mod R/M = 11xx xxxx*/
+	0,0,		"FMOVD	F1,F0",		/* 0x09 */
+	0,0,		"FMOVD	F2,F0",		/* 0x0a */
+	0,0,		"FMOVD	F3,F0",		/* 0x0b */
+	0,0,		"FMOVD	F4,F0",		/* 0x0c */
+	0,0,		"FMOVD	F5,F0",		/* 0x0d */
+	0,0,		"FMOVD	F6,F0",		/* 0x0e */
+	0,0,		"FMOVD	F7,F0",		/* 0x0f */
+	0,0,		"FXCHD	F0,F0",		/* 0x10 */
+	0,0,		"FXCHD	F1,F0",		/* 0x11 */
+	0,0,		"FXCHD	F2,F0",		/* 0x12 */
+	0,0,		"FXCHD	F3,F0",		/* 0x13 */
+	0,0,		"FXCHD	F4,F0",		/* 0x14 */
+	0,0,		"FXCHD	F5,F0",		/* 0x15 */
+	0,0,		"FXCHD	F6,F0",		/* 0x16 */
+	0,0,		"FXCHD	F7,F0",		/* 0x17 */
+	0,0,		"FNOP",			/* 0x18 */
+	0,0,		"",			/* 0x19 */
+	0,0,		"",			/* 0x1a */
+	0,0,		"",			/* 0x1b */
+	0,0,		"",			/* 0x1c */
+	0,0,		"",			/* 0x1d */
+	0,0,		"",			/* 0x1e */
+	0,0,		"",			/* 0x1f */
+	0,0,		"",			/* 0x20 */
+	0,0,		"",			/* 0x21 */
+	0,0,		"",			/* 0x22 */
+	0,0,		"",			/* 0x23 */
+	0,0,		"",			/* 0x24 */
+	0,0,		"",			/* 0x25 */
+	0,0,		"",			/* 0x26 */
+	0,0,		"",			/* 0x27 */
+	0,0,		"FCHS",			/* 0x28 */
+	0,0,		"FABS",			/* 0x29 */
+	0,0,		"",			/* 0x2a */
+	0,0,		"",			/* 0x2b */
+	0,0,		"FTST",			/* 0x2c */
+	0,0,		"FXAM",			/* 0x2d */
+	0,0,		"",			/* 0x2e */
+	0,0,		"",			/* 0x2f */
+	0,0,		"FLD1",			/* 0x30 */
+	0,0,		"FLDL2T",		/* 0x31 */
+	0,0,		"FLDL2E",		/* 0x32 */
+	0,0,		"FLDPI",		/* 0x33 */
+	0,0,		"FLDLG2",		/* 0x34 */
+	0,0,		"FLDLN2",		/* 0x35 */
+	0,0,		"FLDZ",			/* 0x36 */
+	0,0,		"",			/* 0x37 */
+	0,0,		"F2XM1",		/* 0x38 */
+	0,0,		"FYL2X",		/* 0x39 */
+	0,0,		"FPTAN",		/* 0x3a */
+	0,0,		"FPATAN",		/* 0x3b */
+	0,0,		"FXTRACT",		/* 0x3c */
+	0,0,		"FPREM1",		/* 0x3d */
+	0,0,		"FDECSTP",		/* 0x3e */
+	0,0,		"FNCSTP",		/* 0x3f */
+	0,0,		"FPREM",		/* 0x40 */
+	0,0,		"FYL2XP1",		/* 0x41 */
+	0,0,		"FSQRT",		/* 0x42 */
+	0,0,		"FSINCOS",		/* 0x43 */
+	0,0,		"FRNDINT",		/* 0x44 */
+	0,0,		"FSCALE",		/* 0x45 */
+	0,0,		"FSIN",			/* 0x46 */
+	0,0,		"FCOS",			/* 0x47 */
+};
+
+static Optable optabDA[8+8] =
+{
+	0,0,		"FADDL	%e,F0",		/* 0x00 */
+	0,0,		"FMULL	%e,F0",		/* 0x01 */
+	0,0,		"FCOML	%e,F0",		/* 0x02 */
+	0,0,		"FCOMLP	%e,F0",		/* 0x03 */
+	0,0,		"FSUBL	%e,F0",		/* 0x04 */
+	0,0,		"FSUBRL	%e,F0",		/* 0x05 */
+	0,0,		"FDIVL	%e,F0",		/* 0x06 */
+	0,0,		"FDIVRL	%e,F0",		/* 0x07 */
+	0,0,		"",			/* 0x08 */
+	0,0,		"",			/* 0x09 */
+	0,0,		"",			/* 0x0a */
+	0,0,		"",			/* 0x0b */
+	0,0,		"",			/* 0x0c */
+	R1,0,		"FUCOMPP",		/* 0x0d */
+};
+
+static Optable optabDB[8+64] =
+{
+	0,0,		"FMOVL	%e,F0",		/* 0x00 */
+	0,0,		"",			/* 0x01 */
+	0,0,		"FMOVL	F0,%e",		/* 0x02 */
+	0,0,		"FMOVLP	F0,%e",		/* 0x03 */
+	0,0,		"",			/* 0x04 */
+	0,0,		"FMOVX	%e,F0",		/* 0x05 */
+	0,0,		"",			/* 0x06 */
+	0,0,		"FMOVXP	F0,%e",		/* 0x07 */
+	0,0,		"",			/* 0x08 */
+	0,0,		"",			/* 0x09 */
+	0,0,		"",			/* 0x0a */
+	0,0,		"",			/* 0x0b */
+	0,0,		"",			/* 0x0c */
+	0,0,		"",			/* 0x0d */
+	0,0,		"",			/* 0x0e */
+	0,0,		"",			/* 0x0f */
+	0,0,		"",			/* 0x10 */
+	0,0,		"",			/* 0x11 */
+	0,0,		"",			/* 0x12 */
+	0,0,		"",			/* 0x13 */
+	0,0,		"",			/* 0x14 */
+	0,0,		"",			/* 0x15 */
+	0,0,		"",			/* 0x16 */
+	0,0,		"",			/* 0x17 */
+	0,0,		"",			/* 0x18 */
+	0,0,		"",			/* 0x19 */
+	0,0,		"",			/* 0x1a */
+	0,0,		"",			/* 0x1b */
+	0,0,		"",			/* 0x1c */
+	0,0,		"",			/* 0x1d */
+	0,0,		"",			/* 0x1e */
+	0,0,		"",			/* 0x1f */
+	0,0,		"",			/* 0x20 */
+	0,0,		"",			/* 0x21 */
+	0,0,		"",			/* 0x22 */
+	0,0,		"",			/* 0x23 */
+	0,0,		"",			/* 0x24 */
+	0,0,		"",			/* 0x25 */
+	0,0,		"",			/* 0x26 */
+	0,0,		"",			/* 0x27 */
+	0,0,		"",			/* 0x28 */
+	0,0,		"",			/* 0x29 */
+	0,0,		"FCLEX",		/* 0x2a */
+	0,0,		"FINIT",		/* 0x2b */
+};
+
+static Optable optabDC[8+8] =
+{
+	0,0,		"FADDD	%e,F0",		/* 0x00 */
+	0,0,		"FMULD	%e,F0",		/* 0x01 */
+	0,0,		"FCOMD	%e,F0",		/* 0x02 */
+	0,0,		"FCOMDP	%e,F0",		/* 0x03 */
+	0,0,		"FSUBD	%e,F0",		/* 0x04 */
+	0,0,		"FSUBRD	%e,F0",		/* 0x05 */
+	0,0,		"FDIVD	%e,F0",		/* 0x06 */
+	0,0,		"FDIVRD	%e,F0",		/* 0x07 */
+	0,0,		"FADDD	F0,%f",		/* 0x08 */
+	0,0,		"FMULD	F0,%f",		/* 0x09 */
+	0,0,		"",			/* 0x0a */
+	0,0,		"",			/* 0x0b */
+	0,0,		"FSUBRD	F0,%f",		/* 0x0c */
+	0,0,		"FSUBD	F0,%f",		/* 0x0d */
+	0,0,		"FDIVRD	F0,%f",		/* 0x0e */
+	0,0,		"FDIVD	F0,%f",		/* 0x0f */
+};
+
+static Optable optabDD[8+8] =
+{
+	0,0,		"FMOVD	%e,F0",		/* 0x00 */
+	0,0,		"",			/* 0x01 */
+	0,0,		"FMOVD	F0,%e",		/* 0x02 */
+	0,0,		"FMOVDP	F0,%e",		/* 0x03 */
+	0,0,		"FRSTOR%S %e",		/* 0x04 */
+	0,0,		"",			/* 0x05 */
+	0,0,		"FSAVE%S %e",		/* 0x06 */
+	0,0,		"FSTSW	%e",		/* 0x07 */
+	0,0,		"FFREED	%f",		/* 0x08 */
+	0,0,		"",			/* 0x09 */
+	0,0,		"FMOVD	%f,F0",		/* 0x0a */
+	0,0,		"FMOVDP	%f,F0",		/* 0x0b */
+	0,0,		"FUCOMD	%f,F0",		/* 0x0c */
+	0,0,		"FUCOMDP %f,F0",	/* 0x0d */
+};
+
+static Optable optabDE[8+8] =
+{
+	0,0,		"FADDW	%e,F0",		/* 0x00 */
+	0,0,		"FMULW	%e,F0",		/* 0x01 */
+	0,0,		"FCOMW	%e,F0",		/* 0x02 */
+	0,0,		"FCOMWP	%e,F0",		/* 0x03 */
+	0,0,		"FSUBW	%e,F0",		/* 0x04 */
+	0,0,		"FSUBRW	%e,F0",		/* 0x05 */
+	0,0,		"FDIVW	%e,F0",		/* 0x06 */
+	0,0,		"FDIVRW	%e,F0",		/* 0x07 */
+	0,0,		"FADDDP	F0,%f",		/* 0x08 */
+	0,0,		"FMULDP	F0,%f",		/* 0x09 */
+	0,0,		"",			/* 0x0a */
+	R1,0,		"FCOMPDP",		/* 0x0b */
+	0,0,		"FSUBRDP F0,%f",	/* 0x0c */
+	0,0,		"FSUBDP	F0,%f",		/* 0x0d */
+	0,0,		"FDIVRDP F0,%f",	/* 0x0e */
+	0,0,		"FDIVDP	F0,%f",		/* 0x0f */
+};
+
+static Optable optabDF[8+8] =
+{
+	0,0,		"FMOVW	%e,F0",		/* 0x00 */
+	0,0,		"",			/* 0x01 */
+	0,0,		"FMOVW	F0,%e",		/* 0x02 */
+	0,0,		"FMOVWP	F0,%e",		/* 0x03 */
+	0,0,		"FBLD	%e",		/* 0x04 */
+	0,0,		"FMOVL	%e,F0",		/* 0x05 */
+	0,0,		"FBSTP	%e",		/* 0x06 */
+	0,0,		"FMOVLP	F0,%e",		/* 0x07 */
+	0,0,		"",			/* 0x08 */
+	0,0,		"",			/* 0x09 */
+	0,0,		"",			/* 0x0a */
+	0,0,		"",			/* 0x0b */
+	R0,0,		"FSTSW	%OAX",		/* 0x0c */
+};
+
+static Optable optabF6[8] =
+{
+	Ib,0,		"TESTB	%i,%e",		/* 0x00 */
+	0,0,		"",			/* 0x01 */
+	0,0,		"NOTB	%e",		/* 0x02 */
+	0,0,		"NEGB	%e",		/* 0x03 */
+	0,0,		"MULB	AL,%e",		/* 0x04 */
+	0,0,		"IMULB	AL,%e",		/* 0x05 */
+	0,0,		"DIVB	AL,%e",		/* 0x06 */
+	0,0,		"IDIVB	AL,%e",		/* 0x07 */
+};
+
+static Optable optabF7[8] =
+{
+	Iwd,0,		"TEST%S	%i,%e",		/* 0x00 */
+	0,0,		"",			/* 0x01 */
+	0,0,		"NOT%S	%e",		/* 0x02 */
+	0,0,		"NEG%S	%e",		/* 0x03 */
+	0,0,		"MUL%S	%OAX,%e",	/* 0x04 */
+	0,0,		"IMUL%S	%OAX,%e",	/* 0x05 */
+	0,0,		"DIV%S	%OAX,%e",	/* 0x06 */
+	0,0,		"IDIV%S	%OAX,%e",	/* 0x07 */
+};
+
+static Optable optabFE[8] =
+{
+	0,0,		"INCB	%e",		/* 0x00 */
+	0,0,		"DECB	%e",		/* 0x01 */
+};
+
+static Optable optabFF[8] =
+{
+	0,0,		"INC%S	%e",		/* 0x00 */
+	0,0,		"DEC%S	%e",		/* 0x01 */
+	JUMP,0,		"CALL*%S %e",		/* 0x02 */
+	JUMP,0,		"CALLF*%S %e",		/* 0x03 */
+	JUMP,0,		"JMP*%S	%e",		/* 0x04 */
+	JUMP,0,		"JMPF*%S %e",		/* 0x05 */
+	0,0,		"PUSHL	%e",		/* 0x06 */
+};
+
+static Optable optable[256] =
+{
+	RMB,0,		"ADDB	%r,%e",		/* 0x00 */
+	RM,0,		"ADD%S	%r,%e",		/* 0x01 */
+	RMB,0,		"ADDB	%e,%r",		/* 0x02 */
+	RM,0,		"ADD%S	%e,%r",		/* 0x03 */
+	Ib,0,		"ADDB	%i,AL",		/* 0x04 */
+	Iwd,0,		"ADD%S	%i,%OAX",	/* 0x05 */
+	0,0,		"PUSHL	ES",		/* 0x06 */
+	0,0,		"POPL	ES",		/* 0x07 */
+	RMB,0,		"ORB	%r,%e",		/* 0x08 */
+	RM,0,		"OR%S	%r,%e",		/* 0x09 */
+	RMB,0,		"ORB	%e,%r",		/* 0x0a */
+	RM,0,		"OR%S	%e,%r",		/* 0x0b */
+	Ib,0,		"ORB	%i,AL",		/* 0x0c */
+	Iwd,0,		"OR%S	%i,%OAX",	/* 0x0d */
+	0,0,		"PUSHL	CS",		/* 0x0e */
+	AUX,0,		optab0F,		/* 0x0f */
+	RMB,0,		"ADCB	%r,%e",		/* 0x10 */
+	RM,0,		"ADC%S	%r,%e",		/* 0x11 */
+	RMB,0,		"ADCB	%e,%r",		/* 0x12 */
+	RM,0,		"ADC%S	%e,%r",		/* 0x13 */
+	Ib,0,		"ADCB	%i,AL",		/* 0x14 */
+	Iwd,0,		"ADC%S	%i,%OAX",	/* 0x15 */
+	0,0,		"PUSHL	SS",		/* 0x16 */
+	0,0,		"POPL	SS",		/* 0x17 */
+	RMB,0,		"SBBB	%r,%e",		/* 0x18 */
+	RM,0,		"SBB%S	%r,%e",		/* 0x19 */
+	RMB,0,		"SBBB	%e,%r",		/* 0x1a */
+	RM,0,		"SBB%S	%e,%r",		/* 0x1b */
+	Ib,0,		"SBBB	%i,AL",		/* 0x1c */
+	Iwd,0,		"SBB%S	%i,%OAX",	/* 0x1d */
+	0,0,		"PUSHL	DS",		/* 0x1e */
+	0,0,		"POPL	DS",		/* 0x1f */
+	RMB,0,		"ANDB	%r,%e",		/* 0x20 */
+	RM,0,		"AND%S	%r,%e",		/* 0x21 */
+	RMB,0,		"ANDB	%e,%r",		/* 0x22 */
+	RM,0,		"AND%S	%e,%r",		/* 0x23 */
+	Ib,0,		"ANDB	%i,AL",		/* 0x24 */
+	Iwd,0,		"AND%S	%i,%OAX",	/* 0x25 */
+	SEG,0,		"ES:",			/* 0x26 */
+	0,0,		"DAA",			/* 0x27 */
+	RMB,0,		"SUBB	%r,%e",		/* 0x28 */
+	RM,0,		"SUB%S	%r,%e",		/* 0x29 */
+	RMB,0,		"SUBB	%e,%r",		/* 0x2a */
+	RM,0,		"SUB%S	%e,%r",		/* 0x2b */
+	Ib,0,		"SUBB	%i,AL",		/* 0x2c */
+	Iwd,0,		"SUB%S	%i,%OAX",	/* 0x2d */
+	SEG,0,		"CS:",			/* 0x2e */
+	0,0,		"DAS",			/* 0x2f */
+	RMB,0,		"XORB	%r,%e",		/* 0x30 */
+	RM,0,		"XOR%S	%r,%e",		/* 0x31 */
+	RMB,0,		"XORB	%e,%r",		/* 0x32 */
+	RM,0,		"XOR%S	%e,%r",		/* 0x33 */
+	Ib,0,		"XORB	%i,AL",		/* 0x34 */
+	Iwd,0,		"XOR%S	%i,%OAX",	/* 0x35 */
+	SEG,0,		"SS:",			/* 0x36 */
+	0,0,		"AAA",			/* 0x37 */
+	RMB,0,		"CMPB	%r,%e",		/* 0x38 */
+	RM,0,		"CMP%S	%r,%e",		/* 0x39 */
+	RMB,0,		"CMPB	%e,%r",		/* 0x3a */
+	RM,0,		"CMP%S	%e,%r",		/* 0x3b */
+	Ib,0,		"CMPB	%i,AL",		/* 0x3c */
+	Iwd,0,		"CMP%S	%i,%OAX",	/* 0x3d */
+	SEG,0,		"DS:",			/* 0x3e */
+	0,0,		"AAS",			/* 0x3f */
+	0,0,		"INC%S	%OAX",		/* 0x40 */
+	0,0,		"INC%S	%OCX",		/* 0x41 */
+	0,0,		"INC%S	%ODX",		/* 0x42 */
+	0,0,		"INC%S	%OBX",		/* 0x43 */
+	0,0,		"INC%S	%OSP",		/* 0x44 */
+	0,0,		"INC%S	%OBP",		/* 0x45 */
+	0,0,		"INC%S	%OSI",		/* 0x46 */
+	0,0,		"INC%S	%ODI",		/* 0x47 */
+	0,0,		"DEC%S	%OAX",		/* 0x48 */
+	0,0,		"DEC%S	%OCX",		/* 0x49 */
+	0,0,		"DEC%S	%ODX",		/* 0x4a */
+	0,0,		"DEC%S	%OBX",		/* 0x4b */
+	0,0,		"DEC%S	%OSP",		/* 0x4c */
+	0,0,		"DEC%S	%OBP",		/* 0x4d */
+	0,0,		"DEC%S	%OSI",		/* 0x4e */
+	0,0,		"DEC%S	%ODI",		/* 0x4f */
+	0,0,		"PUSH%S	%OAX",		/* 0x50 */
+	0,0,		"PUSH%S	%OCX",		/* 0x51 */
+	0,0,		"PUSH%S	%ODX",		/* 0x52 */
+	0,0,		"PUSH%S	%OBX",		/* 0x53 */
+	0,0,		"PUSH%S	%OSP",		/* 0x54 */
+	0,0,		"PUSH%S	%OBP",		/* 0x55 */
+	0,0,		"PUSH%S	%OSI",		/* 0x56 */
+	0,0,		"PUSH%S	%ODI",		/* 0x57 */
+	0,0,		"POP%S	%OAX",		/* 0x58 */
+	0,0,		"POP%S	%OCX",		/* 0x59 */
+	0,0,		"POP%S	%ODX",		/* 0x5a */
+	0,0,		"POP%S	%OBX",		/* 0x5b */
+	0,0,		"POP%S	%OSP",		/* 0x5c */
+	0,0,		"POP%S	%OBP",		/* 0x5d */
+	0,0,		"POP%S	%OSI",		/* 0x5e */
+	0,0,		"POP%S	%ODI",		/* 0x5f */
+	0,0,		"PUSHA%S",		/* 0x60 */
+	0,0,		"POPA%S",		/* 0x61 */
+	RMM,0,		"BOUND	%e,%r",		/* 0x62 */
+	RM,0,		"ARPL	%r,%e",		/* 0x63 */
+	SEG,0,		"FS:",			/* 0x64 */
+	SEG,0,		"GS:",			/* 0x65 */
+	OPOVER,0,	"",			/* 0x66 */
+	ADDOVER,0,	"",			/* 0x67 */
+	Iwd,0,		"PUSH%S	%i",		/* 0x68 */
+	RM,Iwd,		"IMUL%S	%e,%i,%r",	/* 0x69 */
+	Ib,0,		"PUSH%S	%i",		/* 0x6a */
+	RM,Ibs,		"IMUL%S	%e,%i,%r",	/* 0x6b */
+	0,0,		"INSB	DX,(%ODI)",	/* 0x6c */
+	0,0,		"INS%S	DX,(%ODI)",	/* 0x6d */
+	0,0,		"OUTSB	(%ASI),DX",	/* 0x6e */
+	0,0,		"OUTS%S	(%ASI),DX",	/* 0x6f */
+	Jbs,0,		"JOS	%p",		/* 0x70 */
+	Jbs,0,		"JOC	%p",		/* 0x71 */
+	Jbs,0,		"JCS	%p",		/* 0x72 */
+	Jbs,0,		"JCC	%p",		/* 0x73 */
+	Jbs,0,		"JEQ	%p",		/* 0x74 */
+	Jbs,0,		"JNE	%p",		/* 0x75 */
+	Jbs,0,		"JLS	%p",		/* 0x76 */
+	Jbs,0,		"JHI	%p",		/* 0x77 */
+	Jbs,0,		"JMI	%p",		/* 0x78 */
+	Jbs,0,		"JPL	%p",		/* 0x79 */
+	Jbs,0,		"JPS	%p",		/* 0x7a */
+	Jbs,0,		"JPC	%p",		/* 0x7b */
+	Jbs,0,		"JLT	%p",		/* 0x7c */
+	Jbs,0,		"JGE	%p",		/* 0x7d */
+	Jbs,0,		"JLE	%p",		/* 0x7e */
+	Jbs,0,		"JGT	%p",		/* 0x7f */
+	RMOPB,0,	optab80,		/* 0x80 */
+	RMOP,0,		optab81,		/* 0x81 */
+	0,0,		"",			/* 0x82 */
+	RMOP,0,		optab83,		/* 0x83 */
+	RMB,0,		"TESTB	%r,%e",		/* 0x84 */
+	RM,0,		"TEST%S	%r,%e",		/* 0x85 */
+	RMB,0,		"XCHGB	%r,%e",		/* 0x86 */
+	RM,0,		"XCHG%S	%r,%e",		/* 0x87 */
+	RMB,0,		"MOVB	%r,%e",		/* 0x88 */
+	RM,0,		"MOV%S	%r,%e",		/* 0x89 */
+	RMB,0,		"MOVB	%e,%r",		/* 0x8a */
+	RM,0,		"MOV%S	%e,%r",		/* 0x8b */
+	RM,0,		"MOVW	%g,%e",		/* 0x8c */
+	RM,0,		"LEA	%e,%r",		/* 0x8d */
+	RM,0,		"MOVW	%e,%g",		/* 0x8e */
+	RM,0,		"POP%S	%e",		/* 0x8f */
+	0,0,		"NOP",			/* 0x90 */
+	0,0,		"XCHG	%OCX,%OAX",	/* 0x91 */
+	0,0,		"XCHG	%OCX,%OAX",	/* 0x92 */
+	0,0,		"XCHG	%OCX,%OAX",	/* 0x93 */
+	0,0,		"XCHG	%OSP,%OAX",	/* 0x94 */
+	0,0,		"XCHG	%OBP,%OAX",	/* 0x95 */
+	0,0,		"XCHG	%OSI,%OAX",	/* 0x96 */
+	0,0,		"XCHG	%ODI,%OAX",	/* 0x97 */
+	0,0,		"%X",			/* 0x98 */	/* miserable CBW or CWDE */
+	0,0,		"%x",			/* 0x99 */	/* idiotic CWD or CDQ */
+	PTR,0,		"CALL%S	%d",		/* 0x9a */
+	0,0,		"WAIT",			/* 0x9b */
+	0,0,		"PUSHF",		/* 0x9c */
+	0,0,		"POPF",			/* 0x9d */
+	0,0,		"SAHF",			/* 0x9e */
+	0,0,		"LAHF",			/* 0x9f */
+	Awd,0,		"MOVB	%i,AL",		/* 0xa0 */
+	Awd,0,		"MOV%S	%i,%OAX",	/* 0xa1 */
+	Awd,0,		"MOVB	AL,%i",		/* 0xa2 */
+	Awd,0,		"MOV%S	%OAX,%i",	/* 0xa3 */
+	0,0,		"MOVSB	(%ASI),(%ADI)",	/* 0xa4 */
+	0,0,		"MOVS%S	(%ASI),(%ADI)",	/* 0xa5 */
+	0,0,		"CMPSB	(%ASI),(%ADI)",	/* 0xa6 */
+	0,0,		"CMPS%S	(%ASI),(%ADI)",	/* 0xa7 */
+	Ib,0,		"TESTB	%i,AL",		/* 0xa8 */
+	Iwd,0,		"TEST%S	%i,%OAX",	/* 0xa9 */
+	0,0,		"STOSB	AL,(%ADI)",	/* 0xaa */
+	0,0,		"STOS%S	%OAX,(%ADI)",	/* 0xab */
+	0,0,		"LODSB	(%ASI),AL",	/* 0xac */
+	0,0,		"LODS%S	(%ASI),%OAX",	/* 0xad */
+	0,0,		"SCASB	(%ADI),AL",	/* 0xae */
+	0,0,		"SCAS%S	(%ADI),%OAX",	/* 0xaf */
+	Ib,0,		"MOVB	%i,AL",		/* 0xb0 */
+	Ib,0,		"MOVB	%i,CL",		/* 0xb1 */
+	Ib,0,		"MOVB	%i,DL",		/* 0xb2 */
+	Ib,0,		"MOVB	%i,BL",		/* 0xb3 */
+	Ib,0,		"MOVB	%i,AH",		/* 0xb4 */
+	Ib,0,		"MOVB	%i,CH",		/* 0xb5 */
+	Ib,0,		"MOVB	%i,DH",		/* 0xb6 */
+	Ib,0,		"MOVB	%i,BH",		/* 0xb7 */
+	Iwd,0,		"MOV%S	%i,%OAX",	/* 0xb8 */
+	Iwd,0,		"MOV%S	%i,%OCX",	/* 0xb9 */
+	Iwd,0,		"MOV%S	%i,%ODX",	/* 0xba */
+	Iwd,0,		"MOV%S	%i,%OBX",	/* 0xbb */
+	Iwd,0,		"MOV%S	%i,%OSP",	/* 0xbc */
+	Iwd,0,		"MOV%S	%i,%OBP",	/* 0xbd */
+	Iwd,0,		"MOV%S	%i,%OSI",	/* 0xbe */
+	Iwd,0,		"MOV%S	%i,%ODI",	/* 0xbf */
+	RMOPB,0,	optabC0,		/* 0xc0 */
+	RMOP,0,		optabC1,		/* 0xc1 */
+	Iw,0,		"RET	%i",		/* 0xc2 */
+	RET,0,		"RET",			/* 0xc3 */
+	RM,0,		"LES	%e,%r",		/* 0xc4 */
+	RM,0,		"LDS	%e,%r",		/* 0xc5 */
+	RMB,Ib,		"MOVB	%i,%e",		/* 0xc6 */
+	RM,Iwd,		"MOV%S	%i,%e",		/* 0xc7 */
+	Iw2,Ib,		"ENTER	%i,%I",		/* 0xc8 */	/* loony ENTER */
+	RET,0,		"LEAVE",		/* 0xc9 */	/* bizarre LEAVE */
+	Iw,0,		"RETF	%i",		/* 0xca */
+	RET,0,		"RETF",			/* 0xcb */
+	0,0,		"INT	3",		/* 0xcc */
+	Ib,0,		"INTB	%i",		/* 0xcd */
+	0,0,		"INTO",			/* 0xce */
+	0,0,		"IRET",			/* 0xcf */
+	RMOPB,0,	optabD0,		/* 0xd0 */
+	RMOP,0,		optabD1,		/* 0xd1 */
+	RMOPB,0,	optabD2,		/* 0xd2 */
+	RMOP,0,		optabD3,		/* 0xd3 */
+	OA,0,		"AAM",			/* 0xd4 */
+	OA,0,		"AAD",			/* 0xd5 */
+	0,0,		"",			/* 0xd6 */
+	0,0,		"XLAT",			/* 0xd7 */
+	FRMOP,0,	optabD8,		/* 0xd8 */
+	FRMEX,0,	optabD9,		/* 0xd9 */
+	FRMOP,0,	optabDA,		/* 0xda */
+	FRMEX,0,	optabDB,		/* 0xdb */
+	FRMOP,0,	optabDC,		/* 0xdc */
+	FRMOP,0,	optabDD,		/* 0xdd */
+	FRMOP,0,	optabDE,		/* 0xde */
+	FRMOP,0,	optabDF,		/* 0xdf */
+	Jbs,0,		"LOOPNE	%p",		/* 0xe0 */
+	Jbs,0,		"LOOPE	%p",		/* 0xe1 */
+	Jbs,0,		"LOOP	%p",		/* 0xe2 */
+	Jbs,0,		"JCXZ	%p",		/* 0xe3 */
+	Ib,0,		"INB	%i,AL",		/* 0xe4 */
+	Ib,0,		"IN%S	%i,%OAX",	/* 0xe5 */
+	Ib,0,		"OUTB	AL,%i",		/* 0xe6 */
+	Ib,0,		"OUT%S	%OAX,%i",	/* 0xe7 */
+	Iwds,0,		"CALL	%p",		/* 0xe8 */
+	Iwds,0,		"JMP	%p",		/* 0xe9 */
+	PTR,0,		"JMP	%d",		/* 0xea */
+	Jbs,0,		"JMP	%p",		/* 0xeb */
+	0,0,		"INB	DX,AL",		/* 0xec */
+	0,0,		"IN%S	DX,%OAX",	/* 0xed */
+	0,0,		"OUTB	AL,DX",		/* 0xee */
+	0,0,		"OUT%S	%OAX,DX",	/* 0xef */
+	PRE,0,		"LOCK",			/* 0xf0 */
+	0,0,		"",			/* 0xf1 */	
+	PRE,0,		"REPNE",		/* 0xf2 */
+	PRE,0,		"REP",			/* 0xf3 */
+	0,0,		"HALT",			/* 0xf4 */
+	0,0,		"CMC",			/* 0xf5 */
+	RMOPB,0,	optabF6,		/* 0xf6 */
+	RMOP,0,		optabF7,		/* 0xf7 */
+	0,0,		"CLC",			/* 0xf8 */
+	0,0,		"STC",			/* 0xf9 */
+	0,0,		"CLI",			/* 0xfa */
+	0,0,		"STI",			/* 0xfb */
+	0,0,		"CLD",			/* 0xfc */
+	0,0,		"STD",			/* 0xfd */
+	RMOPB,0,	optabFE,		/* 0xfe */
+	RMOP,0,		optabFF,		/* 0xff */
+};
+
+/*
+ *  get a byte of the instruction
+ */
+static int
+igetc(Map * map, Instr *ip, uchar *c)
+{
+	if(ip->n+1 > sizeof(ip->mem)){
+		werrstr("instruction too long");
+		return -1;
+	}
+	if (get1(map, ip->addr+ip->n, c, 1) < 0) {
+		werrstr("can't read instruction: %r");
+		return -1;
+	}
+	ip->mem[ip->n++] = *c;
+	return 1;
+}
+
+/*
+ *  get two bytes of the instruction
+ */
+static int
+igets(Map *map, Instr *ip, ushort *sp)
+{
+	uchar	c;
+	ushort s;
+
+	if (igetc(map, ip, &c) < 0)
+		return -1;
+	s = c;
+	if (igetc(map, ip, &c) < 0)
+		return -1;
+	s |= (c<<8);
+	*sp = s;
+	return 1;
+}
+
+/*
+ *  get 4 bytes of the instruction
+ */
+static int
+igetl(Map *map, Instr *ip, ulong *lp)
+{
+	ushort s;
+	long	l;
+
+	if (igets(map, ip, &s) < 0)
+		return -1;
+	l = s;
+	if (igets(map, ip, &s) < 0)
+		return -1;
+	l |= (s<<16);
+	*lp = l;
+	return 1;
+}
+
+static int
+getdisp(Map *map, Instr *ip, int mod, int rm, int code)
+{
+	uchar c;
+	ushort s;
+
+	if (mod > 2)
+		return 1;
+	if (mod == 1) {
+		if (igetc(map, ip, &c) < 0)
+			return -1;
+		if (c&0x80)
+			ip->disp = c|0xffffff00;
+		else
+			ip->disp = c&0xff;
+	} else if (mod == 2 || rm == code) {
+		if (ip->asize == 'E') {
+			if (igetl(map, ip, &ip->disp) < 0)
+				return -1;
+		} else {
+			if (igets(map, ip, &s) < 0)
+				return -1;
+			if (s&0x8000)
+				ip->disp = s|0xffff0000;
+			else
+				ip->disp = s;
+		}
+		if (mod == 0)
+			ip->base = -1;
+	}
+	return 1;
+}
+
+static int
+modrm(Map *map, Instr *ip, uchar c)
+{
+	uchar rm, mod;
+
+	mod = (c>>6)&3;
+	rm = c&7;
+	ip->mod = mod;
+	ip->base = rm;
+	ip->reg = (c>>3)&7;
+	if (mod == 3)			/* register */
+		return 1;
+	if (ip->asize == 0) {		/* 16-bit mode */
+		switch(rm)
+		{
+		case 0:
+			ip->base = BX; ip->index = SI;
+			break;
+		case 1:
+			ip->base = BX; ip->index = DI;
+			break;
+		case 2:
+			ip->base = BP; ip->index = SI;
+			break;
+		case 3:
+			ip->base = BP; ip->index = DI;
+			break;
+		case 4:
+			ip->base = SI;
+			break;
+		case 5:
+			ip->base = DI;
+			break;
+		case 6:
+			ip->base = BP;
+			break;
+		case 7:
+			ip->base = BX;
+			break;
+		default:
+			break;
+		}
+		return getdisp(map, ip, mod, rm, 6);
+	}
+	if (rm == 4) {	/* scummy sib byte */
+		if (igetc(map, ip, &c) < 0)
+			return -1;
+		ip->ss = (c>>6)&0x03;
+		ip->index = (c>>3)&0x07;
+		if (ip->index == 4)
+			ip->index = -1;
+		ip->base = c&0x07;
+		return getdisp(map, ip, mod, ip->base, 5);
+	}
+	return getdisp(map, ip, mod, rm, 5);
+}
+
+static Optable *
+mkinstr(Map *map, Instr *ip, ulong pc)
+{
+	int i, n;
+	uchar c;
+	ushort s;
+	Optable *op, *obase;
+	char buf[128];
+
+	memset(ip, 0, sizeof(*ip));
+	ip->base = -1;
+	ip->index = -1;
+	if(asstype == AI8086)
+		ip->osize = 'W';
+	else {
+		ip->osize = 'L';
+		ip->asize = 'E';
+	}
+	ip->addr = pc;
+	if (igetc(map, ip, &c) < 0)
+		return 0;
+	obase = optable;
+newop:
+	op = &obase[c];
+	if (op->proto == 0) {
+badop:
+		n = snprint(buf, sizeof(buf), "opcode: ??");
+		for (i = 0; i < ip->n && n < sizeof(buf)-3; i++, n+=2)
+			_hexify(buf+n, ip->mem[i], 1);
+		strcpy(buf+n, "??");
+		werrstr(buf);
+		return 0;
+	}
+	for(i = 0; i < 2 && op->operand[i]; i++) {
+		switch(op->operand[i])
+		{
+		case Ib:	/* 8-bit immediate - (no sign extension)*/
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			ip->imm = c&0xff;
+			break;
+		case Jbs:	/* 8-bit jump immediate (sign extended) */
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			if (c&0x80)
+				ip->imm = c|0xffffff00;
+			else
+				ip->imm = c&0xff;
+			ip->jumptype = Jbs;
+			break;
+		case Ibs:	/* 8-bit immediate (sign extended) */
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			if (c&0x80)
+				if (ip->osize == 'L')
+					ip->imm = c|0xffffff00;
+				else
+					ip->imm = c|0xff00;
+			else
+				ip->imm = c&0xff;
+			break;
+		case Iw:	/* 16-bit immediate -> imm */
+			if (igets(map, ip, &s) < 0)
+				return 0;
+			ip->imm = s&0xffff;
+			ip->jumptype = Iw;
+			break;
+		case Iw2:	/* 16-bit immediate -> in imm2*/
+			if (igets(map, ip, &s) < 0)
+				return 0;
+			ip->imm2 = s&0xffff;
+			break;
+		case Iwd:	/* Operand-sized immediate (no sign extension)*/
+			if (ip->osize == 'L') {
+				if (igetl(map, ip, &ip->imm) < 0)
+					return 0;
+			} else {
+				if (igets(map, ip, &s)< 0)
+					return 0;
+				ip->imm = s&0xffff;
+			}
+			break;
+		case Awd:	/* Address-sized immediate (no sign extension)*/
+			if (ip->asize == 'E') {
+				if (igetl(map, ip, &ip->imm) < 0)
+					return 0;
+			} else {
+				if (igets(map, ip, &s)< 0)
+					return 0;
+				ip->imm = s&0xffff;
+			}
+			break;
+		case Iwds:	/* Operand-sized immediate (sign extended) */
+			if (ip->osize == 'L') {
+				if (igetl(map, ip, &ip->imm) < 0)
+					return 0;
+			} else {
+				if (igets(map, ip, &s)< 0)
+					return 0;
+				if (s&0x8000)
+					ip->imm = s|0xffff0000;
+				else
+					ip->imm = s&0xffff;
+			}
+			ip->jumptype = Iwds;
+			break;
+		case OA:	/* literal 0x0a byte */
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			if (c != 0x0a)
+				goto badop;
+			break;
+		case R0:	/* base register must be R0 */
+			if (ip->base != 0)
+				goto badop;
+			break;
+		case R1:	/* base register must be R1 */
+			if (ip->base != 1)
+				goto badop;
+			break;
+		case RMB:	/* R/M field with byte register (/r)*/
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			if (modrm(map, ip, c) < 0)
+				return 0;
+			ip->osize = 'B';
+			break;
+		case RM:	/* R/M field with register (/r) */
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			if (modrm(map, ip, c) < 0)
+				return 0;
+			break;
+		case RMOPB:	/* R/M field with op code (/digit) */
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			if (modrm(map, ip, c) < 0)
+				return 0;
+			c = ip->reg;		/* secondary op code */
+			obase = (Optable*)op->proto;
+			ip->osize = 'B';
+			goto newop;
+		case RMOP:	/* R/M field with op code (/digit) */
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			if (modrm(map, ip, c) < 0)
+				return 0;
+			c = ip->reg;
+			obase = (Optable*)op->proto;
+			goto newop;
+		case FRMOP:	/* FP R/M field with op code (/digit) */
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			if (modrm(map, ip, c) < 0)
+				return 0;
+			if ((c&0xc0) == 0xc0)
+				c = ip->reg+8;		/* 16 entry table */
+			else
+				c = ip->reg;
+			obase = (Optable*)op->proto;
+			goto newop;
+		case FRMEX:	/* Extended FP R/M field with op code (/digit) */
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			if (modrm(map, ip, c) < 0)
+				return 0;
+			if ((c&0xc0) == 0xc0)
+				c = (c&0x3f)+8;		/* 64-entry table */
+			else
+				c = ip->reg;
+			obase = (Optable*)op->proto;
+			goto newop;
+		case RMR:	/* R/M register only (mod = 11) */
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			if ((c&0xc0) != 0xc0) {
+				werrstr("invalid R/M register: %x", c);
+				return 0;
+			}
+			if (modrm(map, ip, c) < 0)
+				return 0;
+			break;
+		case RMM:	/* R/M register only (mod = 11) */
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			if ((c&0xc0) == 0xc0) {
+				werrstr("invalid R/M memory mode: %x", c);
+				return 0;
+			}
+			if (modrm(map, ip, c) < 0)
+				return 0;
+			break;
+		case PTR:	/* Seg:Displacement addr (ptr16:16 or ptr16:32) */
+			if (ip->osize == 'L') {
+				if (igetl(map, ip, &ip->disp) < 0)
+					return 0;
+			} else {
+				if (igets(map, ip, &s)< 0)
+					return 0;
+				ip->disp = s&0xffff;
+			}
+			if (igets(map, ip, (ushort*)&ip->seg) < 0)
+				return 0;
+			ip->jumptype = PTR;
+			break;
+		case AUX:	/* Multi-byte op code - Auxiliary table */
+			obase = (Optable*)op->proto;
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			goto newop;
+		case PRE:	/* Instr Prefix */
+			ip->prefix = (char*)op->proto;
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			goto newop;
+		case SEG:	/* Segment Prefix */
+			ip->segment = (char*)op->proto;
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			goto newop;
+		case OPOVER:	/* Operand size override */
+			ip->osize = 'W';
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			goto newop;
+		case ADDOVER:	/* Address size override */
+			ip->asize = 0;
+			if (igetc(map, ip, &c) < 0)
+				return 0;
+			goto newop;
+		case JUMP:	/* mark instruction as JUMP or RET */
+		case RET:
+			ip->jumptype = op->operand[i];
+			break;
+		default:
+			werrstr("bad operand type %d", op->operand[i]);
+			return 0;
+		}
+	}
+	return op;
+}
+
+static void
+bprint(Instr *ip, char *fmt, ...)
+{
+	va_list arg;
+
+	va_start(arg, fmt);
+	ip->curr = vseprint(ip->curr, ip->end, fmt, arg);
+	va_end(arg);
+}
+
+/*
+ *  if we want to call 16 bit regs AX,BX,CX,...
+ *  and 32 bit regs EAX,EBX,ECX,... then
+ *  change the defs of ANAME and ONAME to:
+ *  #define	ANAME(ip)	((ip->asize == 'E' ? "E" : "")
+ *  #define	ONAME(ip)	((ip)->osize == 'L' ? "E" : "")
+ */
+#define	ANAME(ip)	""
+#define	ONAME(ip)	""
+
+static char *reg[] =  {
+	"AX",		/* 0 */
+	"CX",		/* 1 */
+	"DX",		/* 2 */
+	"BX",		/* 3 */
+	"SP",		/* 4 */
+	"BP",		/* 5 */
+	"SI",		/* 6 */
+	"DI",		/* 7 */
+};
+
+static char *breg[] = { "AL", "CL", "DL", "BL", "AH", "CH", "DH", "BH" };
+static char *sreg[] = { "ES", "CS", "SS", "DS", "FS", "GS" };
+
+static void
+plocal(Instr *ip)
+{
+	int ret, offset;
+	Symbol s;
+	char *reg;
+
+	offset = ip->disp;
+	if (!findsym(ip->addr, CTEXT, &s) || !findlocal(&s, FRAMENAME, &s)) {
+		bprint(ip, "%lux(SP)", offset);
+		return;
+	}
+
+	if (s.value > ip->disp) {
+		ret = getauto(&s, s.value-ip->disp-mach->szaddr, CAUTO, &s);
+		reg = "(SP)";
+	} else {
+		offset -= s.value;
+		ret = getauto(&s, offset, CPARAM, &s);
+		reg = "(FP)";
+	}
+	if (ret)
+		bprint(ip, "%s+", s.name);
+	else
+		offset = ip->disp;
+	bprint(ip, "%lux%s", offset, reg);
+}
+
+static void
+pea(Instr *ip)
+{
+	if (ip->mod == 3) {
+		if (ip->osize == 'B')
+			bprint(ip, breg[ip->base]);
+		else
+			bprint(ip, "%s%s", ANAME(ip), reg[ip->base]);
+		return;
+	}
+	if (ip->segment)
+		bprint(ip, ip->segment);
+	if (ip->asize == 'E' && ip->base == SP)
+		plocal(ip);
+	else {
+		bprint(ip,"%lux", ip->disp);
+		if (ip->base >= 0)
+			bprint(ip,"(%s%s)", ANAME(ip), reg[ip->base]);
+	}
+	if (ip->index >= 0)
+		bprint(ip,"(%s%s*%d)", ANAME(ip), reg[ip->index], 1<<ip->ss);
+}
+
+static void
+immediate(Instr *ip, long val)
+{
+	Symbol s;
+	long w;
+
+	if (findsym(val, CANY, &s)) {
+		w = val - s.value;
+		if (w < 0)
+			w = -w;
+		if (w < 4096) {
+			if (w)
+				bprint(ip, "%s+%lux(SB)", s.name, w);
+			else
+				bprint(ip, "%s(SB)", s.name);
+			return;
+		}
+	}
+	bprint(ip, "%lux", val);
+}
+
+static void
+prinstr(Instr *ip, char *fmt)
+{
+	if (ip->prefix)
+		bprint(ip, "%s ", ip->prefix);
+	for (; *fmt && ip->curr < ip->end; fmt++) {
+		if (*fmt != '%')
+			*ip->curr++ = *fmt;
+		else switch(*++fmt)
+		{
+		case '%':
+			*ip->curr++ = '%';
+			break;
+		case 'A':
+			bprint(ip, "%s", ANAME(ip));
+			break;
+		case 'C':
+			bprint(ip, "CR%d", ip->reg);
+			break;
+		case 'D':
+			if (ip->reg < 4 || ip->reg == 6 || ip->reg == 7)
+				bprint(ip, "DR%d",ip->reg);
+			else
+				bprint(ip, "???");
+			break;
+		case 'I':
+			bprint(ip, "$");
+			immediate(ip, ip->imm2);
+			break;
+		case 'O':
+			bprint(ip,"%s", ONAME(ip));
+			break;
+		case 'i':
+			bprint(ip, "$");
+			immediate(ip,ip->imm);
+			break;
+		case 'R':
+			bprint(ip, "%s%s", ONAME(ip), reg[ip->reg]);
+			break;
+		case 'S':
+			bprint(ip, "%c", ip->osize);
+			break;
+		case 'T':
+			if (ip->reg == 6 || ip->reg == 7)
+				bprint(ip, "TR%d",ip->reg);
+			else
+				bprint(ip, "???");
+			break;
+		case 'X':
+			if (ip->osize == 'L')
+				bprint(ip,"CWDE");
+			else
+				bprint(ip, "CBW");
+			break;
+		case 'd':
+			bprint(ip,"%lux:%lux",ip->seg,ip->disp);
+			break;
+		case 'e':
+			pea(ip);
+			break;
+		case 'f':
+			bprint(ip, "F%d", ip->base);
+			break;
+		case 'g':
+			if (ip->reg < 6)
+				bprint(ip,"%s",sreg[ip->reg]);
+			else
+				bprint(ip,"???");
+			break;
+		case 'p':
+			immediate(ip, ip->imm+ip->addr+ip->n);
+			break;
+		case 'r':
+			if (ip->osize == 'B')
+				bprint(ip,"%s",breg[ip->reg]);
+			else
+				bprint(ip, reg[ip->reg]);
+			break;
+		case 'x':
+			if (ip->osize == 'L')
+				bprint(ip,"CDQ");
+			else
+				bprint(ip, "CWD");
+			break;
+		default:
+			bprint(ip, "%%%c", *fmt);
+			break;
+		}
+	}
+	*ip->curr = 0;		/* there's always room for 1 byte */
+}
+
+static int
+i386inst(Map *map, ulong pc, char modifier, char *buf, int n)
+{
+	Instr	instr;
+	Optable *op;
+
+	USED(modifier);
+	op = mkinstr(map, &instr, pc);
+	if (op == 0) {
+		buf[0] = 0;
+		errstr(buf, n);
+		return -1;
+	}
+	instr.curr = buf;
+	instr.end = buf+n-1;
+	prinstr(&instr, op->proto);
+	return instr.n;
+}
+
+static int
+i386das(Map *map, ulong pc, char *buf, int n)
+{
+	Instr	instr;
+	int i;
+
+	if (mkinstr(map, &instr, pc) == 0) {
+		buf[0] = 0;
+		errstr(buf, n);
+		return -1;
+	}
+	for(i = 0; i < instr.n && n > 2; i++) {
+		_hexify(buf, instr.mem[i], 1);
+		buf += 2;
+		n -= 2;
+	}
+	*buf = 0;
+	return instr.n;
+}
+
+static int
+i386instlen(Map *map, ulong pc)
+{
+	Instr i;
+
+	if (mkinstr(map, &i, pc))
+		return i.n;
+	return -1;
+}
+
+static int
+i386foll(Map *map, ulong pc, Rgetter rget, ulong *foll)
+{
+	Instr i;
+	Optable *op;
+	ushort s;
+	ulong l, addr;
+	int n;
+
+	op = mkinstr(map, &i, pc);
+	if (!op)
+		return -1;
+
+	n = 0;
+
+	switch(i.jumptype) {
+	case RET:		/* RETURN or LEAVE */
+	case Iw:		/* RETURN */
+		if (strcmp(op->proto, "LEAVE") == 0) {
+			if (get4(map, (*rget)(map, "BP"), (long*)&l) < 0)
+				return -1;
+		} else if (get4(map, (*rget)(map, mach->sp), (long*)&l) < 0)
+			return -1;
+		foll[0] = l;
+		return 1;
+	case Iwds:		/* pc relative JUMP or CALL*/
+	case Jbs:		/* pc relative JUMP or CALL */
+		foll[0] = pc+i.imm+i.n;
+		n = 1;
+		break;
+	case PTR:		/* seg:displacement JUMP or CALL */
+		foll[0] = (i.seg<<4)+i.disp;
+		return 1;
+	case JUMP:		/* JUMP or CALL EA */
+
+		if(i.mod == 3) {
+			foll[0] = (*rget)(map, reg[i.base]);
+			return 1;
+		}
+			/* calculate the effective address */
+		addr = i.disp;
+		if (i.base >= 0) {
+			if (get4(map, (*rget)(map, reg[i.base]), (long*)&l) < 0)
+				return -1;
+			addr += l;
+		}
+		if (i.index >= 0) {
+			if (get4(map, (*rget)(map, reg[i.index]), (long*)&l) < 0)
+				return -1;
+			addr += l*(1<<i.ss);
+		}
+			/* now retrieve a seg:disp value at that address */
+		if (get2(map, addr, &s) < 0)		/* seg */
+			return -1;
+		foll[0] = s<<4;
+		addr += 2;
+		if (i.asize == 'L') {
+			if (get4(map, addr, (long*)&l) < 0)	/* disp32 */
+				return -1;
+			foll[0] += l;
+		} else {					/* disp16 */
+			if (get2(map, addr, &s) < 0)
+				return -1;
+			foll[0] += s;
+		}
+		return 1;
+	default:
+		break;
+	}		
+	if (strncmp(op->proto,"JMP", 3) == 0 || strncmp(op->proto,"CALL", 4) == 0)
+		return 1;
+	foll[n++] = pc+i.n;
+	return n;
+}