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-rw-r--r--sys/i386/i386/db_disasm.c1375
1 files changed, 1375 insertions, 0 deletions
diff --git a/sys/i386/i386/db_disasm.c b/sys/i386/i386/db_disasm.c
new file mode 100644
index 0000000..81b6de4
--- /dev/null
+++ b/sys/i386/i386/db_disasm.c
@@ -0,0 +1,1375 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ *
+ * $Id: db_disasm.c,v 1.5 1993/12/19 00:49:58 wollman Exp $
+ */
+
+/*
+ * Instruction disassembler.
+ */
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <ddb/ddb.h>
+
+#include <ddb/db_access.h>
+#include <ddb/db_sym.h>
+
+/*
+ * Size attributes
+ */
+#define BYTE 0
+#define WORD 1
+#define LONG 2
+#define QUAD 3
+#define SNGL 4
+#define DBLR 5
+#define EXTR 6
+#define SDEP 7
+#define NONE 8
+
+/*
+ * Addressing modes
+ */
+#define E 1 /* general effective address */
+#define Eind 2 /* indirect address (jump, call) */
+#define Ew 3 /* address, word size */
+#define Eb 4 /* address, byte size */
+#define R 5 /* register, in 'reg' field */
+#define Rw 6 /* word register, in 'reg' field */
+#define Ri 7 /* register in instruction */
+#define S 8 /* segment reg, in 'reg' field */
+#define Si 9 /* segment reg, in instruction */
+#define A 10 /* accumulator */
+#define BX 11 /* (bx) */
+#define CL 12 /* cl, for shifts */
+#define DX 13 /* dx, for IO */
+#define SI 14 /* si */
+#define DI 15 /* di */
+#define CR 16 /* control register */
+#define DR 17 /* debug register */
+#define TR 18 /* test register */
+#define I 19 /* immediate, unsigned */
+#define Is 20 /* immediate, signed */
+#define Ib 21 /* byte immediate, unsigned */
+#define Ibs 22 /* byte immediate, signed */
+#define Iw 23 /* word immediate, unsigned */
+#define Il 24 /* long immediate */
+#define O 25 /* direct address */
+#define Db 26 /* byte displacement from EIP */
+#define Dl 27 /* long displacement from EIP */
+#define o1 28 /* constant 1 */
+#define o3 29 /* constant 3 */
+#define OS 30 /* immediate offset/segment */
+#define ST 31 /* FP stack top */
+#define STI 32 /* FP stack */
+#define X 33 /* extended FP op */
+#define XA 34 /* for 'fstcw %ax' */
+
+struct inst {
+ char * i_name; /* name */
+ short i_has_modrm; /* has regmodrm byte */
+ short i_size; /* operand size */
+ int i_mode; /* addressing modes */
+ char * i_extra; /* pointer to extra opcode table */
+};
+
+#define op1(x) (x)
+#define op2(x,y) ((x)|((y)<<8))
+#define op3(x,y,z) ((x)|((y)<<8)|((z)<<16))
+
+struct finst {
+ char * f_name; /* name for memory instruction */
+ int f_size; /* size for memory instruction */
+ int f_rrmode; /* mode for rr instruction */
+ char * f_rrname; /* name for rr instruction
+ (or pointer to table) */
+};
+
+char * db_Grp6[] = {
+ "sldt",
+ "str",
+ "lldt",
+ "ltr",
+ "verr",
+ "verw",
+ "",
+ ""
+};
+
+char * db_Grp7[] = {
+ "sgdt",
+ "sidt",
+ "lgdt",
+ "lidt",
+ "smsw",
+ "",
+ "lmsw",
+ "invlpg"
+};
+
+char * db_Grp8[] = {
+ "",
+ "",
+ "",
+ "",
+ "bt",
+ "bts",
+ "btr",
+ "btc"
+};
+
+struct inst db_inst_0f0x[] = {
+/*00*/ { "", TRUE, NONE, op1(Ew), (char *)db_Grp6 },
+/*01*/ { "", TRUE, NONE, op1(Ew), (char *)db_Grp7 },
+/*02*/ { "lar", TRUE, LONG, op2(E,R), 0 },
+/*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 },
+/*04*/ { "", FALSE, NONE, 0, 0 },
+/*05*/ { "", FALSE, NONE, 0, 0 },
+/*06*/ { "clts", FALSE, NONE, 0, 0 },
+/*07*/ { "", FALSE, NONE, 0, 0 },
+
+/*08*/ { "invd", FALSE, NONE, 0, 0 },
+/*09*/ { "wbinvd",FALSE, NONE, 0, 0 },
+/*0a*/ { "", FALSE, NONE, 0, 0 },
+/*0b*/ { "", FALSE, NONE, 0, 0 },
+/*0c*/ { "", FALSE, NONE, 0, 0 },
+/*0d*/ { "", FALSE, NONE, 0, 0 },
+/*0e*/ { "", FALSE, NONE, 0, 0 },
+/*0f*/ { "", FALSE, NONE, 0, 0 },
+};
+
+struct inst db_inst_0f2x[] = {
+/*20*/ { "mov", TRUE, LONG, op2(CR,E), 0 }, /* use E for reg */
+/*21*/ { "mov", TRUE, LONG, op2(DR,E), 0 }, /* since mod == 11 */
+/*22*/ { "mov", TRUE, LONG, op2(E,CR), 0 },
+/*23*/ { "mov", TRUE, LONG, op2(E,DR), 0 },
+/*24*/ { "mov", TRUE, LONG, op2(TR,E), 0 },
+/*25*/ { "", FALSE, NONE, 0, 0 },
+/*26*/ { "mov", TRUE, LONG, op2(E,TR), 0 },
+/*27*/ { "", FALSE, NONE, 0, 0 },
+
+/*28*/ { "", FALSE, NONE, 0, 0 },
+/*29*/ { "", FALSE, NONE, 0, 0 },
+/*2a*/ { "", FALSE, NONE, 0, 0 },
+/*2b*/ { "", FALSE, NONE, 0, 0 },
+/*2c*/ { "", FALSE, NONE, 0, 0 },
+/*2d*/ { "", FALSE, NONE, 0, 0 },
+/*2e*/ { "", FALSE, NONE, 0, 0 },
+/*2f*/ { "", FALSE, NONE, 0, 0 },
+};
+
+struct inst db_inst_0f8x[] = {
+/*80*/ { "jo", FALSE, NONE, op1(Dl), 0 },
+/*81*/ { "jno", FALSE, NONE, op1(Dl), 0 },
+/*82*/ { "jb", FALSE, NONE, op1(Dl), 0 },
+/*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 },
+/*84*/ { "jz", FALSE, NONE, op1(Dl), 0 },
+/*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 },
+/*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 },
+/*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 },
+
+/*88*/ { "js", FALSE, NONE, op1(Dl), 0 },
+/*89*/ { "jns", FALSE, NONE, op1(Dl), 0 },
+/*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 },
+/*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 },
+/*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 },
+/*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 },
+/*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 },
+/*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 },
+};
+
+struct inst db_inst_0f9x[] = {
+/*90*/ { "seto", TRUE, NONE, op1(Eb), 0 },
+/*91*/ { "setno", TRUE, NONE, op1(Eb), 0 },
+/*92*/ { "setb", TRUE, NONE, op1(Eb), 0 },
+/*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 },
+/*94*/ { "setz", TRUE, NONE, op1(Eb), 0 },
+/*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 },
+/*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 },
+/*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 },
+
+/*98*/ { "sets", TRUE, NONE, op1(Eb), 0 },
+/*99*/ { "setns", TRUE, NONE, op1(Eb), 0 },
+/*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 },
+/*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 },
+/*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 },
+/*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 },
+/*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 },
+/*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 },
+};
+
+struct inst db_inst_0fax[] = {
+/*a0*/ { "push", FALSE, NONE, op1(Si), 0 },
+/*a1*/ { "pop", FALSE, NONE, op1(Si), 0 },
+/*a2*/ { "", FALSE, NONE, 0, 0 },
+/*a3*/ { "bt", TRUE, LONG, op2(E,R), 0 },
+/*a4*/ { "shld", TRUE, LONG, op3(Ib,E,R), 0 },
+/*a5*/ { "shld", TRUE, LONG, op3(CL,E,R), 0 },
+/*a6*/ { "", FALSE, NONE, 0, 0 },
+/*a7*/ { "", FALSE, NONE, 0, 0 },
+
+/*a8*/ { "push", FALSE, NONE, op1(Si), 0 },
+/*a9*/ { "pop", FALSE, NONE, op1(Si), 0 },
+/*aa*/ { "", FALSE, NONE, 0, 0 },
+/*ab*/ { "bts", TRUE, LONG, op2(E,R), 0 },
+/*ac*/ { "shrd", TRUE, LONG, op3(Ib,E,R), 0 },
+/*ad*/ { "shrd", TRUE, LONG, op3(CL,E,R), 0 },
+/*a6*/ { "", FALSE, NONE, 0, 0 },
+/*a7*/ { "imul", TRUE, LONG, op2(E,R), 0 },
+};
+
+struct inst db_inst_0fbx[] = {
+/*b0*/ { "", FALSE, NONE, 0, 0 },
+/*b1*/ { "", FALSE, NONE, 0, 0 },
+/*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 },
+/*b3*/ { "bts", TRUE, LONG, op2(R, E), 0 },
+/*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 },
+/*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 },
+/*b6*/ { "movzb", TRUE, LONG, op2(E, R), 0 },
+/*b7*/ { "movzw", TRUE, LONG, op2(E, R), 0 },
+
+/*b8*/ { "", FALSE, NONE, 0, 0 },
+/*b9*/ { "", FALSE, NONE, 0, 0 },
+/*ba*/ { "", TRUE, LONG, op2(Is, E), (char *)db_Grp8 },
+/*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 },
+/*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 },
+/*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 },
+/*be*/ { "movsb", TRUE, LONG, op2(E, R), 0 },
+/*bf*/ { "movsw", TRUE, LONG, op2(E, R), 0 },
+};
+
+struct inst db_inst_0fcx[] = {
+/*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 },
+/*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 },
+/*c2*/ { "", FALSE, NONE, 0, 0 },
+/*c3*/ { "", FALSE, NONE, 0, 0 },
+/*c4*/ { "", FALSE, NONE, 0, 0 },
+/*c5*/ { "", FALSE, NONE, 0, 0 },
+/*c6*/ { "", FALSE, NONE, 0, 0 },
+/*c7*/ { "", FALSE, NONE, 0, 0 },
+/*c8*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
+/*c9*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
+/*ca*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
+/*cb*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
+/*cc*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
+/*cd*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
+/*ce*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
+/*cf*/ { "bswap", FALSE, LONG, op1(Ri), 0 },
+};
+
+struct inst db_inst_0fdx[] = {
+/*c0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 },
+/*c1*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 },
+/*c2*/ { "", FALSE, NONE, 0, 0 },
+/*c3*/ { "", FALSE, NONE, 0, 0 },
+/*c4*/ { "", FALSE, NONE, 0, 0 },
+/*c5*/ { "", FALSE, NONE, 0, 0 },
+/*c6*/ { "", FALSE, NONE, 0, 0 },
+/*c7*/ { "", FALSE, NONE, 0, 0 },
+/*c8*/ { "", FALSE, NONE, 0, 0 },
+/*c9*/ { "", FALSE, NONE, 0, 0 },
+/*ca*/ { "", FALSE, NONE, 0, 0 },
+/*cb*/ { "", FALSE, NONE, 0, 0 },
+/*cc*/ { "", FALSE, NONE, 0, 0 },
+/*cd*/ { "", FALSE, NONE, 0, 0 },
+/*ce*/ { "", FALSE, NONE, 0, 0 },
+/*cf*/ { "", FALSE, NONE, 0, 0 },
+};
+
+struct inst *db_inst_0f[] = {
+ db_inst_0f0x,
+ 0,
+ db_inst_0f2x,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0,
+ db_inst_0f8x,
+ db_inst_0f9x,
+ db_inst_0fax,
+ db_inst_0fbx,
+ db_inst_0fcx,
+ db_inst_0fdx,
+ 0,
+ 0
+};
+
+char * db_Esc92[] = {
+ "fnop", "", "", "", "", "", "", ""
+};
+char * db_Esc93[] = {
+ "", "", "", "", "", "", "", ""
+};
+char * db_Esc94[] = {
+ "fchs", "fabs", "", "", "ftst", "fxam", "", ""
+};
+char * db_Esc95[] = {
+ "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
+};
+char * db_Esc96[] = {
+ "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
+ "fincstp"
+};
+char * db_Esc97[] = {
+ "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
+};
+
+char * db_Esca4[] = {
+ "", "fucompp","", "", "", "", "", ""
+};
+
+char * db_Escb4[] = {
+ "", "", "fnclex","fninit","", "", "", ""
+};
+
+char * db_Esce3[] = {
+ "", "fcompp","", "", "", "", "", ""
+};
+
+char * db_Escf4[] = {
+ "fnstsw","", "", "", "", "", "", ""
+};
+
+struct finst db_Esc8[] = {
+/*0*/ { "fadd", SNGL, op2(STI,ST), 0 },
+/*1*/ { "fmul", SNGL, op2(STI,ST), 0 },
+/*2*/ { "fcom", SNGL, op2(STI,ST), 0 },
+/*3*/ { "fcomp", SNGL, op2(STI,ST), 0 },
+/*4*/ { "fsub", SNGL, op2(STI,ST), 0 },
+/*5*/ { "fsubr", SNGL, op2(STI,ST), 0 },
+/*6*/ { "fdiv", SNGL, op2(STI,ST), 0 },
+/*7*/ { "fdivr", SNGL, op2(STI,ST), 0 },
+};
+
+struct finst db_Esc9[] = {
+/*0*/ { "fld", SNGL, op1(STI), 0 },
+/*1*/ { "", NONE, op1(STI), "fxch" },
+/*2*/ { "fst", SNGL, op1(X), (char *)db_Esc92 },
+/*3*/ { "fstp", SNGL, op1(X), (char *)db_Esc93 },
+/*4*/ { "fldenv", NONE, op1(X), (char *)db_Esc94 },
+/*5*/ { "fldcw", NONE, op1(X), (char *)db_Esc95 },
+/*6*/ { "fnstenv",NONE, op1(X), (char *)db_Esc96 },
+/*7*/ { "fnstcw", NONE, op1(X), (char *)db_Esc97 },
+};
+
+struct finst db_Esca[] = {
+/*0*/ { "fiadd", WORD, 0, 0 },
+/*1*/ { "fimul", WORD, 0, 0 },
+/*2*/ { "ficom", WORD, 0, 0 },
+/*3*/ { "ficomp", WORD, 0, 0 },
+/*4*/ { "fisub", WORD, op1(X), (char *)db_Esca4 },
+/*5*/ { "fisubr", WORD, 0, 0 },
+/*6*/ { "fidiv", WORD, 0, 0 },
+/*7*/ { "fidivr", WORD, 0, 0 }
+};
+
+struct finst db_Escb[] = {
+/*0*/ { "fild", WORD, 0, 0 },
+/*1*/ { "", NONE, 0, 0 },
+/*2*/ { "fist", WORD, 0, 0 },
+/*3*/ { "fistp", WORD, 0, 0 },
+/*4*/ { "", WORD, op1(X), (char *)db_Escb4 },
+/*5*/ { "fld", EXTR, 0, 0 },
+/*6*/ { "", WORD, 0, 0 },
+/*7*/ { "fstp", EXTR, 0, 0 },
+};
+
+struct finst db_Escc[] = {
+/*0*/ { "fadd", DBLR, op2(ST,STI), 0 },
+/*1*/ { "fmul", DBLR, op2(ST,STI), 0 },
+/*2*/ { "fcom", DBLR, op2(ST,STI), 0 },
+/*3*/ { "fcomp", DBLR, op2(ST,STI), 0 },
+/*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" },
+/*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" },
+/*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" },
+/*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" },
+};
+
+struct finst db_Escd[] = {
+/*0*/ { "fld", DBLR, op1(STI), "ffree" },
+/*1*/ { "", NONE, 0, 0 },
+/*2*/ { "fst", DBLR, op1(STI), 0 },
+/*3*/ { "fstp", DBLR, op1(STI), 0 },
+/*4*/ { "frstor", NONE, op1(STI), "fucom" },
+/*5*/ { "", NONE, op1(STI), "fucomp" },
+/*6*/ { "fnsave", NONE, 0, 0 },
+/*7*/ { "fnstsw", NONE, 0, 0 },
+};
+
+struct finst db_Esce[] = {
+/*0*/ { "fiadd", LONG, op2(ST,STI), "faddp" },
+/*1*/ { "fimul", LONG, op2(ST,STI), "fmulp" },
+/*2*/ { "ficom", LONG, 0, 0 },
+/*3*/ { "ficomp", LONG, op1(X), (char *)db_Esce3 },
+/*4*/ { "fisub", LONG, op2(ST,STI), "fsubrp" },
+/*5*/ { "fisubr", LONG, op2(ST,STI), "fsubp" },
+/*6*/ { "fidiv", LONG, op2(ST,STI), "fdivrp" },
+/*7*/ { "fidivr", LONG, op2(ST,STI), "fdivp" },
+};
+
+struct finst db_Escf[] = {
+/*0*/ { "fild", LONG, 0, 0 },
+/*1*/ { "", LONG, 0, 0 },
+/*2*/ { "fist", LONG, 0, 0 },
+/*3*/ { "fistp", LONG, 0, 0 },
+/*4*/ { "fbld", NONE, op1(XA), (char *)db_Escf4 },
+/*5*/ { "fld", QUAD, 0, 0 },
+/*6*/ { "fbstp", NONE, 0, 0 },
+/*7*/ { "fstp", QUAD, 0, 0 },
+};
+
+struct finst *db_Esc_inst[] = {
+ db_Esc8, db_Esc9, db_Esca, db_Escb,
+ db_Escc, db_Escd, db_Esce, db_Escf
+};
+
+char * db_Grp1[] = {
+ "add",
+ "or",
+ "adc",
+ "sbb",
+ "and",
+ "sub",
+ "xor",
+ "cmp"
+};
+
+char * db_Grp2[] = {
+ "rol",
+ "ror",
+ "rcl",
+ "rcr",
+ "shl",
+ "shr",
+ "shl",
+ "sar"
+};
+
+struct inst db_Grp3[] = {
+ { "test", TRUE, NONE, op2(I,E), 0 },
+ { "test", TRUE, NONE, op2(I,E), 0 },
+ { "not", TRUE, NONE, op1(E), 0 },
+ { "neg", TRUE, NONE, op1(E), 0 },
+ { "mul", TRUE, NONE, op2(E,A), 0 },
+ { "imul", TRUE, NONE, op2(E,A), 0 },
+ { "div", TRUE, NONE, op2(E,A), 0 },
+ { "idiv", TRUE, NONE, op2(E,A), 0 },
+};
+
+struct inst db_Grp4[] = {
+ { "inc", TRUE, BYTE, op1(E), 0 },
+ { "dec", TRUE, BYTE, op1(E), 0 },
+ { "", TRUE, NONE, 0, 0 },
+ { "", TRUE, NONE, 0, 0 },
+ { "", TRUE, NONE, 0, 0 },
+ { "", TRUE, NONE, 0, 0 },
+ { "", TRUE, NONE, 0, 0 },
+ { "", TRUE, NONE, 0, 0 }
+};
+
+struct inst db_Grp5[] = {
+ { "inc", TRUE, LONG, op1(E), 0 },
+ { "dec", TRUE, LONG, op1(E), 0 },
+ { "call", TRUE, NONE, op1(Eind),0 },
+ { "lcall", TRUE, NONE, op1(Eind),0 },
+ { "jmp", TRUE, NONE, op1(Eind),0 },
+ { "ljmp", TRUE, NONE, op1(Eind),0 },
+ { "push", TRUE, LONG, op1(E), 0 },
+ { "", TRUE, NONE, 0, 0 }
+};
+
+struct inst db_inst_table[256] = {
+/*00*/ { "add", TRUE, BYTE, op2(R, E), 0 },
+/*01*/ { "add", TRUE, LONG, op2(R, E), 0 },
+/*02*/ { "add", TRUE, BYTE, op2(E, R), 0 },
+/*03*/ { "add", TRUE, LONG, op2(E, R), 0 },
+/*04*/ { "add", FALSE, BYTE, op2(Is, A), 0 },
+/*05*/ { "add", FALSE, LONG, op2(Is, A), 0 },
+/*06*/ { "push", FALSE, NONE, op1(Si), 0 },
+/*07*/ { "pop", FALSE, NONE, op1(Si), 0 },
+
+/*08*/ { "or", TRUE, BYTE, op2(R, E), 0 },
+/*09*/ { "or", TRUE, LONG, op2(R, E), 0 },
+/*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 },
+/*0b*/ { "or", TRUE, LONG, op2(E, R), 0 },
+/*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 },
+/*0d*/ { "or", FALSE, LONG, op2(I, A), 0 },
+/*0e*/ { "push", FALSE, NONE, op1(Si), 0 },
+/*0f*/ { "", FALSE, NONE, 0, 0 },
+
+/*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 },
+/*11*/ { "adc", TRUE, LONG, op2(R, E), 0 },
+/*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 },
+/*13*/ { "adc", TRUE, LONG, op2(E, R), 0 },
+/*14*/ { "adc", FALSE, BYTE, op2(Is, A), 0 },
+/*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 },
+/*16*/ { "push", FALSE, NONE, op1(Si), 0 },
+/*17*/ { "pop", FALSE, NONE, op1(Si), 0 },
+
+/*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 },
+/*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 },
+/*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 },
+/*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 },
+/*1c*/ { "sbb", FALSE, BYTE, op2(Is, A), 0 },
+/*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 },
+/*1e*/ { "push", FALSE, NONE, op1(Si), 0 },
+/*1f*/ { "pop", FALSE, NONE, op1(Si), 0 },
+
+/*20*/ { "and", TRUE, BYTE, op2(R, E), 0 },
+/*21*/ { "and", TRUE, LONG, op2(R, E), 0 },
+/*22*/ { "and", TRUE, BYTE, op2(E, R), 0 },
+/*23*/ { "and", TRUE, LONG, op2(E, R), 0 },
+/*24*/ { "and", FALSE, BYTE, op2(I, A), 0 },
+/*25*/ { "and", FALSE, LONG, op2(I, A), 0 },
+/*26*/ { "", FALSE, NONE, 0, 0 },
+/*27*/ { "aaa", FALSE, NONE, 0, 0 },
+
+/*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 },
+/*29*/ { "sub", TRUE, LONG, op2(R, E), 0 },
+/*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 },
+/*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 },
+/*2c*/ { "sub", FALSE, BYTE, op2(Is, A), 0 },
+/*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 },
+/*2e*/ { "", FALSE, NONE, 0, 0 },
+/*2f*/ { "das", FALSE, NONE, 0, 0 },
+
+/*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 },
+/*31*/ { "xor", TRUE, LONG, op2(R, E), 0 },
+/*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 },
+/*33*/ { "xor", TRUE, LONG, op2(E, R), 0 },
+/*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 },
+/*35*/ { "xor", FALSE, LONG, op2(I, A), 0 },
+/*36*/ { "", FALSE, NONE, 0, 0 },
+/*37*/ { "daa", FALSE, NONE, 0, 0 },
+
+/*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 },
+/*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 },
+/*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 },
+/*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 },
+/*3c*/ { "cmp", FALSE, BYTE, op2(Is, A), 0 },
+/*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 },
+/*3e*/ { "", FALSE, NONE, 0, 0 },
+/*3f*/ { "aas", FALSE, NONE, 0, 0 },
+
+/*40*/ { "inc", FALSE, LONG, op1(Ri), 0 },
+/*41*/ { "inc", FALSE, LONG, op1(Ri), 0 },
+/*42*/ { "inc", FALSE, LONG, op1(Ri), 0 },
+/*43*/ { "inc", FALSE, LONG, op1(Ri), 0 },
+/*44*/ { "inc", FALSE, LONG, op1(Ri), 0 },
+/*45*/ { "inc", FALSE, LONG, op1(Ri), 0 },
+/*46*/ { "inc", FALSE, LONG, op1(Ri), 0 },
+/*47*/ { "inc", FALSE, LONG, op1(Ri), 0 },
+
+/*48*/ { "dec", FALSE, LONG, op1(Ri), 0 },
+/*49*/ { "dec", FALSE, LONG, op1(Ri), 0 },
+/*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 },
+/*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 },
+/*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 },
+/*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 },
+/*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 },
+/*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 },
+
+/*50*/ { "push", FALSE, LONG, op1(Ri), 0 },
+/*51*/ { "push", FALSE, LONG, op1(Ri), 0 },
+/*52*/ { "push", FALSE, LONG, op1(Ri), 0 },
+/*53*/ { "push", FALSE, LONG, op1(Ri), 0 },
+/*54*/ { "push", FALSE, LONG, op1(Ri), 0 },
+/*55*/ { "push", FALSE, LONG, op1(Ri), 0 },
+/*56*/ { "push", FALSE, LONG, op1(Ri), 0 },
+/*57*/ { "push", FALSE, LONG, op1(Ri), 0 },
+
+/*58*/ { "pop", FALSE, LONG, op1(Ri), 0 },
+/*59*/ { "pop", FALSE, LONG, op1(Ri), 0 },
+/*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 },
+/*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 },
+/*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 },
+/*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 },
+/*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 },
+/*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 },
+
+/*60*/ { "pusha", FALSE, LONG, 0, 0 },
+/*61*/ { "popa", FALSE, LONG, 0, 0 },
+/*62*/ { "bound", TRUE, LONG, op2(E, R), 0 },
+/*63*/ { "arpl", TRUE, NONE, op2(Ew,Rw), 0 },
+
+/*64*/ { "", FALSE, NONE, 0, 0 },
+/*65*/ { "", FALSE, NONE, 0, 0 },
+/*66*/ { "", FALSE, NONE, 0, 0 },
+/*67*/ { "", FALSE, NONE, 0, 0 },
+
+/*68*/ { "push", FALSE, LONG, op1(I), 0 },
+/*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 },
+/*6a*/ { "push", FALSE, LONG, op1(Ib), 0 },
+/*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 },
+/*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 },
+/*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 },
+/*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 },
+/*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 },
+
+/*70*/ { "jo", FALSE, NONE, op1(Db), 0 },
+/*71*/ { "jno", FALSE, NONE, op1(Db), 0 },
+/*72*/ { "jb", FALSE, NONE, op1(Db), 0 },
+/*73*/ { "jnb", FALSE, NONE, op1(Db), 0 },
+/*74*/ { "jz", FALSE, NONE, op1(Db), 0 },
+/*75*/ { "jnz", FALSE, NONE, op1(Db), 0 },
+/*76*/ { "jbe", FALSE, NONE, op1(Db), 0 },
+/*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 },
+
+/*78*/ { "js", FALSE, NONE, op1(Db), 0 },
+/*79*/ { "jns", FALSE, NONE, op1(Db), 0 },
+/*7a*/ { "jp", FALSE, NONE, op1(Db), 0 },
+/*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 },
+/*7c*/ { "jl", FALSE, NONE, op1(Db), 0 },
+/*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 },
+/*7e*/ { "jle", FALSE, NONE, op1(Db), 0 },
+/*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 },
+
+/*80*/ { "", TRUE, BYTE, op2(I, E), (char *)db_Grp1 },
+/*81*/ { "", TRUE, LONG, op2(I, E), (char *)db_Grp1 },
+/*82*/ { "", TRUE, BYTE, op2(Is,E), (char *)db_Grp1 },
+/*83*/ { "", TRUE, LONG, op2(Ibs,E), (char *)db_Grp1 },
+/*84*/ { "test", TRUE, BYTE, op2(R, E), 0 },
+/*85*/ { "test", TRUE, LONG, op2(R, E), 0 },
+/*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 },
+/*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 },
+
+/*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 },
+/*89*/ { "mov", TRUE, LONG, op2(R, E), 0 },
+/*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 },
+/*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 },
+/*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 },
+/*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 },
+/*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 },
+/*8f*/ { "pop", TRUE, LONG, op1(E), 0 },
+
+/*90*/ { "nop", FALSE, NONE, 0, 0 },
+/*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
+/*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
+/*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
+/*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
+/*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
+/*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
+/*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
+
+/*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */
+/*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */
+/*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 },
+/*9b*/ { "wait", FALSE, NONE, 0, 0 },
+/*9c*/ { "pushf", FALSE, LONG, 0, 0 },
+/*9d*/ { "popf", FALSE, LONG, 0, 0 },
+/*9e*/ { "sahf", FALSE, NONE, 0, 0 },
+/*9f*/ { "lahf", FALSE, NONE, 0, 0 },
+
+/*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 },
+/*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 },
+/*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 },
+/*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 },
+/*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 },
+/*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 },
+/*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 },
+/*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 },
+
+/*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 },
+/*a9*/ { "test", FALSE, LONG, op2(I, A), 0 },
+/*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 },
+/*ab*/ { "stos", FALSE, LONG, op1(DI), 0 },
+/*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 },
+/*ad*/ { "lods", FALSE, LONG, op1(SI), 0 },
+/*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 },
+/*af*/ { "scas", FALSE, LONG, op1(SI), 0 },
+
+/*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
+/*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
+/*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
+/*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
+/*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
+/*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
+/*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
+/*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
+
+/*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
+/*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
+/*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
+/*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
+/*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
+/*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
+/*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
+/*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
+
+/*c0*/ { "", TRUE, BYTE, op2(Ib, E), (char *)db_Grp2 },
+/*c1*/ { "", TRUE, LONG, op2(Ib, E), (char *)db_Grp2 },
+/*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 },
+/*c3*/ { "ret", FALSE, NONE, 0, 0 },
+/*c4*/ { "les", TRUE, LONG, op2(E, R), 0 },
+/*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 },
+/*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 },
+/*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 },
+
+/*c8*/ { "enter", FALSE, NONE, op2(Ib, Iw), 0 },
+/*c9*/ { "leave", FALSE, NONE, 0, 0 },
+/*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 },
+/*cb*/ { "lret", FALSE, NONE, 0, 0 },
+/*cc*/ { "int", FALSE, NONE, op1(o3), 0 },
+/*cd*/ { "int", FALSE, NONE, op1(Ib), 0 },
+/*ce*/ { "into", FALSE, NONE, 0, 0 },
+/*cf*/ { "iret", FALSE, NONE, 0, 0 },
+
+/*d0*/ { "", TRUE, BYTE, op2(o1, E), (char *)db_Grp2 },
+/*d1*/ { "", TRUE, LONG, op2(o1, E), (char *)db_Grp2 },
+/*d2*/ { "", TRUE, BYTE, op2(CL, E), (char *)db_Grp2 },
+/*d3*/ { "", TRUE, LONG, op2(CL, E), (char *)db_Grp2 },
+/*d4*/ { "aam", TRUE, NONE, 0, 0 },
+/*d5*/ { "aad", TRUE, NONE, 0, 0 },
+/*d6*/ { "", FALSE, NONE, 0, 0 },
+/*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 },
+
+/*d8*/ { "", TRUE, NONE, 0, (char *)db_Esc8 },
+/*d9*/ { "", TRUE, NONE, 0, (char *)db_Esc9 },
+/*da*/ { "", TRUE, NONE, 0, (char *)db_Esca },
+/*db*/ { "", TRUE, NONE, 0, (char *)db_Escb },
+/*dc*/ { "", TRUE, NONE, 0, (char *)db_Escc },
+/*dd*/ { "", TRUE, NONE, 0, (char *)db_Escd },
+/*de*/ { "", TRUE, NONE, 0, (char *)db_Esce },
+/*df*/ { "", TRUE, NONE, 0, (char *)db_Escf },
+
+/*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 },
+/*e1*/ { "loope", FALSE, NONE, op1(Db), 0 },
+/*e2*/ { "loop", FALSE, NONE, op1(Db), 0 },
+/*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" },
+/*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 },
+/*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 },
+/*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 },
+/*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 },
+
+/*e8*/ { "call", FALSE, NONE, op1(Dl), 0 },
+/*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 },
+/*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 },
+/*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 },
+/*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 },
+/*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 },
+/*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 },
+/*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 },
+
+/*f0*/ { "", FALSE, NONE, 0, 0 },
+/*f1*/ { "", FALSE, NONE, 0, 0 },
+/*f2*/ { "", FALSE, NONE, 0, 0 },
+/*f3*/ { "", FALSE, NONE, 0, 0 },
+/*f4*/ { "hlt", FALSE, NONE, 0, 0 },
+/*f5*/ { "cmc", FALSE, NONE, 0, 0 },
+/*f6*/ { "", TRUE, BYTE, 0, (char *)db_Grp3 },
+/*f7*/ { "", TRUE, LONG, 0, (char *)db_Grp3 },
+
+/*f8*/ { "clc", FALSE, NONE, 0, 0 },
+/*f9*/ { "stc", FALSE, NONE, 0, 0 },
+/*fa*/ { "cli", FALSE, NONE, 0, 0 },
+/*fb*/ { "sti", FALSE, NONE, 0, 0 },
+/*fc*/ { "cld", FALSE, NONE, 0, 0 },
+/*fd*/ { "std", FALSE, NONE, 0, 0 },
+/*fe*/ { "", TRUE, NONE, 0, (char *)db_Grp4 },
+/*ff*/ { "", TRUE, NONE, 0, (char *)db_Grp5 },
+};
+
+struct inst db_bad_inst =
+ { "???", FALSE, NONE, 0, 0 }
+;
+
+#define f_mod(byte) ((byte)>>6)
+#define f_reg(byte) (((byte)>>3)&0x7)
+#define f_rm(byte) ((byte)&0x7)
+
+#define sib_ss(byte) ((byte)>>6)
+#define sib_index(byte) (((byte)>>3)&0x7)
+#define sib_base(byte) ((byte)&0x7)
+
+struct i_addr {
+ int is_reg; /* if reg, reg number is in 'disp' */
+ int disp;
+ char * base;
+ char * index;
+ int ss;
+};
+
+char * db_index_reg_16[8] = {
+ "%bx,%si",
+ "%bx,%di",
+ "%bp,%si",
+ "%bp,%di",
+ "%si",
+ "%di",
+ "%bp",
+ "%bx"
+};
+
+char * db_reg[3][8] = {
+ "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh",
+ "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di",
+ "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi"
+};
+
+char * db_seg_reg[8] = {
+ "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
+};
+
+/*
+ * lengths for size attributes
+ */
+int db_lengths[] = {
+ 1, /* BYTE */
+ 2, /* WORD */
+ 4, /* LONG */
+ 8, /* QUAD */
+ 4, /* SNGL */
+ 8, /* DBLR */
+ 10, /* EXTR */
+};
+
+#define get_value_inc(result, loc, size, is_signed) \
+ result = db_get_value((loc), (size), (is_signed)); \
+ (loc) += (size);
+
+/*
+ * Read address at location and return updated location.
+ */
+db_addr_t
+db_read_address(loc, short_addr, regmodrm, addrp)
+ db_addr_t loc;
+ int short_addr;
+ int regmodrm;
+ struct i_addr *addrp; /* out */
+{
+ int mod, rm, sib, index, ss, disp;
+
+ mod = f_mod(regmodrm);
+ rm = f_rm(regmodrm);
+
+ if (mod == 3) {
+ addrp->is_reg = TRUE;
+ addrp->disp = rm;
+ return (loc);
+ }
+ addrp->is_reg = FALSE;
+ addrp->index = 0;
+
+ if (short_addr) {
+ addrp->index = 0;
+ addrp->ss = 0;
+ switch (mod) {
+ case 0:
+ if (rm == 6) {
+ get_value_inc(disp, loc, 2, TRUE);
+ addrp->disp = disp;
+ addrp->base = 0;
+ }
+ else {
+ addrp->disp = 0;
+ addrp->base = db_index_reg_16[rm];
+ }
+ break;
+ case 1:
+ get_value_inc(disp, loc, 1, TRUE);
+ addrp->disp = disp;
+ addrp->base = db_index_reg_16[rm];
+ break;
+ case 2:
+ get_value_inc(disp, loc, 2, TRUE);
+ addrp->disp = disp;
+ addrp->base = db_index_reg_16[rm];
+ break;
+ }
+ }
+ else {
+ if (mod != 3 && rm == 4) {
+ get_value_inc(sib, loc, 1, FALSE);
+ rm = sib_base(sib);
+ index = sib_index(sib);
+ if (index != 4)
+ addrp->index = db_reg[LONG][index];
+ addrp->ss = sib_ss(sib);
+ }
+
+ switch (mod) {
+ case 0:
+ if (rm == 5) {
+ get_value_inc(addrp->disp, loc, 4, FALSE);
+ addrp->base = 0;
+ }
+ else {
+ addrp->disp = 0;
+ addrp->base = db_reg[LONG][rm];
+ }
+ break;
+
+ case 1:
+ get_value_inc(disp, loc, 1, TRUE);
+ addrp->disp = disp;
+ addrp->base = db_reg[LONG][rm];
+ break;
+
+ case 2:
+ get_value_inc(disp, loc, 4, FALSE);
+ addrp->disp = disp;
+ addrp->base = db_reg[LONG][rm];
+ break;
+ }
+ }
+ return (loc);
+}
+
+void
+db_print_address(seg, size, addrp)
+ char * seg;
+ int size;
+ struct i_addr *addrp;
+{
+ if (addrp->is_reg) {
+ db_printf("%s", db_reg[size][addrp->disp]);
+ return;
+ }
+
+ if (seg) {
+ db_printf("%s:", seg);
+ }
+
+ db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY);
+ if (addrp->base != 0 || addrp->index != 0) {
+ db_printf("(");
+ if (addrp->base)
+ db_printf("%s", addrp->base);
+ if (addrp->index)
+ db_printf(",%s,%d", addrp->index, 1<<addrp->ss);
+ db_printf(")");
+ }
+}
+
+/*
+ * Disassemble floating-point ("escape") instruction
+ * and return updated location.
+ */
+db_addr_t
+db_disasm_esc(loc, inst, short_addr, size, seg)
+ db_addr_t loc;
+ int inst;
+ int short_addr;
+ int size;
+ char * seg;
+{
+ int regmodrm;
+ struct finst *fp;
+ int mod;
+ struct i_addr address;
+ char * name;
+
+ get_value_inc(regmodrm, loc, 1, FALSE);
+ fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)];
+ mod = f_mod(regmodrm);
+ if (mod != 3) {
+ /*
+ * Normal address modes.
+ */
+ loc = db_read_address(loc, short_addr, regmodrm, &address);
+ db_printf(fp->f_name);
+ switch(fp->f_size) {
+ case SNGL:
+ db_printf("s");
+ break;
+ case DBLR:
+ db_printf("l");
+ break;
+ case EXTR:
+ db_printf("t");
+ break;
+ case WORD:
+ db_printf("s");
+ break;
+ case LONG:
+ db_printf("l");
+ break;
+ case QUAD:
+ db_printf("q");
+ break;
+ default:
+ break;
+ }
+ db_printf("\t");
+ db_print_address(seg, BYTE, &address);
+ }
+ else {
+ /*
+ * 'reg-reg' - special formats
+ */
+ switch (fp->f_rrmode) {
+ case op2(ST,STI):
+ name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
+ db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm));
+ break;
+ case op2(STI,ST):
+ name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
+ db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm));
+ break;
+ case op1(STI):
+ name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
+ db_printf("%s\t%%st(%d)",name, f_rm(regmodrm));
+ break;
+ case op1(X):
+ db_printf("%s", ((char **)fp->f_rrname)[f_rm(regmodrm)]);
+ break;
+ case op1(XA):
+ db_printf("%s\t%%ax",
+ ((char **)fp->f_rrname)[f_rm(regmodrm)]);
+ break;
+ default:
+ db_printf("<bad instruction>");
+ break;
+ }
+ }
+
+ return (loc);
+}
+
+/*
+ * Disassemble instruction at 'loc'. 'altfmt' specifies an
+ * (optional) alternate format. Return address of start of
+ * next instruction.
+ */
+db_addr_t
+db_disasm(loc, altfmt)
+ db_addr_t loc;
+ boolean_t altfmt;
+{
+ int inst;
+ int size;
+ int short_addr;
+ char * seg;
+ struct inst * ip;
+ char * i_name;
+ int i_size;
+ int i_mode;
+ int regmodrm = 0;
+ boolean_t first;
+ int displ;
+ int prefix;
+ int imm;
+ int imm2;
+ int len;
+ struct i_addr address;
+
+ get_value_inc(inst, loc, 1, FALSE);
+ short_addr = FALSE;
+ size = LONG;
+ seg = 0;
+
+ /*
+ * Get prefixes
+ */
+ prefix = TRUE;
+ do {
+ switch (inst) {
+ case 0x66: /* data16 */
+ size = WORD;
+ break;
+ case 0x67:
+ short_addr = TRUE;
+ break;
+ case 0x26:
+ seg = "%es";
+ break;
+ case 0x36:
+ seg = "%ss";
+ break;
+ case 0x2e:
+ seg = "%cs";
+ break;
+ case 0x3e:
+ seg = "%ds";
+ break;
+ case 0x64:
+ seg = "%fs";
+ break;
+ case 0x65:
+ seg = "%gs";
+ break;
+ case 0xf0:
+ db_printf("lock ");
+ break;
+ case 0xf2:
+ db_printf("repne ");
+ break;
+ case 0xf3:
+ db_printf("repe "); /* XXX repe VS rep */
+ break;
+ default:
+ prefix = FALSE;
+ break;
+ }
+ if (prefix) {
+ get_value_inc(inst, loc, 1, FALSE);
+ }
+ } while (prefix);
+
+ if (inst >= 0xd8 && inst <= 0xdf) {
+ loc = db_disasm_esc(loc, inst, short_addr, size, seg);
+ db_printf("\n");
+ return (loc);
+ }
+
+ if (inst == 0x0f) {
+ get_value_inc(inst, loc, 1, FALSE);
+ ip = db_inst_0f[inst>>4];
+ if (ip == 0) {
+ ip = &db_bad_inst;
+ }
+ else {
+ ip = &ip[inst&0xf];
+ }
+ }
+ else
+ ip = &db_inst_table[inst];
+
+ if (ip->i_has_modrm) {
+ get_value_inc(regmodrm, loc, 1, FALSE);
+ loc = db_read_address(loc, short_addr, regmodrm, &address);
+ }
+
+ i_name = ip->i_name;
+ i_size = ip->i_size;
+ i_mode = ip->i_mode;
+
+ if (ip->i_extra == (char *)db_Grp1 ||
+ ip->i_extra == (char *)db_Grp2 ||
+ ip->i_extra == (char *)db_Grp6 ||
+ ip->i_extra == (char *)db_Grp7 ||
+ ip->i_extra == (char *)db_Grp8) {
+ i_name = ((char **)ip->i_extra)[f_reg(regmodrm)];
+ }
+ else if (ip->i_extra == (char *)db_Grp3) {
+ ip = (struct inst *)ip->i_extra;
+ ip = &ip[f_reg(regmodrm)];
+ i_name = ip->i_name;
+ i_mode = ip->i_mode;
+ }
+ else if (ip->i_extra == (char *)db_Grp4 ||
+ ip->i_extra == (char *)db_Grp5) {
+ ip = (struct inst *)ip->i_extra;
+ ip = &ip[f_reg(regmodrm)];
+ i_name = ip->i_name;
+ i_mode = ip->i_mode;
+ i_size = ip->i_size;
+ }
+
+ if (i_size == SDEP) {
+ if (size == WORD)
+ db_printf(i_name);
+ else
+ db_printf(ip->i_extra);
+ }
+ else {
+ db_printf(i_name);
+ if (i_size != NONE) {
+ if (i_size == BYTE) {
+ db_printf("b");
+ size = BYTE;
+ }
+ else if (i_size == WORD) {
+ db_printf("w");
+ size = WORD;
+ }
+ else if (size == WORD)
+ db_printf("w");
+ else
+ db_printf("l");
+ }
+ }
+ db_printf("\t");
+ for (first = TRUE;
+ i_mode != 0;
+ i_mode >>= 8, first = FALSE)
+ {
+ if (!first)
+ db_printf(",");
+
+ switch (i_mode & 0xFF) {
+
+ case E:
+ db_print_address(seg, size, &address);
+ break;
+
+ case Eind:
+ db_printf("*");
+ db_print_address(seg, size, &address);
+ break;
+
+ case Ew:
+ db_print_address(seg, WORD, &address);
+ break;
+
+ case Eb:
+ db_print_address(seg, BYTE, &address);
+ break;
+
+ case R:
+ db_printf("%s", db_reg[size][f_reg(regmodrm)]);
+ break;
+
+ case Rw:
+ db_printf("%s", db_reg[WORD][f_reg(regmodrm)]);
+ break;
+
+ case Ri:
+ db_printf("%s", db_reg[size][f_rm(inst)]);
+ break;
+
+ case S:
+ db_printf("%s", db_seg_reg[f_reg(regmodrm)]);
+ break;
+
+ case Si:
+ db_printf("%s", db_seg_reg[f_reg(inst)]);
+ break;
+
+ case A:
+ db_printf("%s", db_reg[size][0]); /* acc */
+ break;
+
+ case BX:
+ if (seg)
+ db_printf("%s:", seg);
+ db_printf("(%s)", short_addr ? "%bx" : "%ebx");
+ break;
+
+ case CL:
+ db_printf("%%cl");
+ break;
+
+ case DX:
+ db_printf("%%dx");
+ break;
+
+ case SI:
+ if (seg)
+ db_printf("%s:", seg);
+ db_printf("(%s)", short_addr ? "%si" : "%esi");
+ break;
+
+ case DI:
+ db_printf("%%es:(%s)", short_addr ? "%di" : "%edi");
+ break;
+
+ case CR:
+ db_printf("%%cr%d", f_reg(regmodrm));
+ break;
+
+ case DR:
+ db_printf("%%dr%d", f_reg(regmodrm));
+ break;
+
+ case TR:
+ db_printf("%%tr%d", f_reg(regmodrm));
+ break;
+
+ case I:
+ len = db_lengths[size];
+ get_value_inc(imm, loc, len, FALSE);/* unsigned */
+ db_printf("$%#n", imm);
+ break;
+
+ case Is:
+ len = db_lengths[size];
+ get_value_inc(imm, loc, len, TRUE); /* signed */
+ db_printf("$%#r", imm);
+ break;
+
+ case Ib:
+ get_value_inc(imm, loc, 1, FALSE); /* unsigned */
+ db_printf("$%#n", imm);
+ break;
+
+ case Ibs:
+ get_value_inc(imm, loc, 1, TRUE); /* signed */
+ db_printf("$%#r", imm);
+ break;
+
+ case Iw:
+ get_value_inc(imm, loc, 2, FALSE); /* unsigned */
+ db_printf("$%#n", imm);
+ break;
+
+ case Il:
+ get_value_inc(imm, loc, 4, FALSE);
+ db_printf("$%#n", imm);
+ break;
+
+ case O:
+ if (short_addr) {
+ get_value_inc(displ, loc, 2, TRUE);
+ }
+ else {
+ get_value_inc(displ, loc, 4, TRUE);
+ }
+ if (seg)
+ db_printf("%s:%#r",seg, displ);
+ else
+ db_printsym((db_addr_t)displ, DB_STGY_ANY);
+ break;
+
+ case Db:
+ get_value_inc(displ, loc, 1, TRUE);
+ db_printsym((db_addr_t)(displ + loc), DB_STGY_XTRN);
+ break;
+
+ case Dl:
+ get_value_inc(displ, loc, 4, TRUE);
+ db_printsym((db_addr_t)(displ + loc), DB_STGY_XTRN);
+ break;
+
+ case o1:
+ db_printf("$1");
+ break;
+
+ case o3:
+ db_printf("$3");
+ break;
+
+ case OS:
+ get_value_inc(imm, loc, 4, FALSE); /* offset */
+ get_value_inc(imm2, loc, 2, FALSE); /* segment */
+ db_printf("$%#n,%#n", imm2, imm);
+ break;
+ }
+ }
+
+ if (altfmt == 0) {
+ if (inst == 0xe9 || inst == 0xeb) {
+ /*
+ * GAS pads to longword boundary after unconditional jumps.
+ */
+ loc = (loc + (4-1)) & ~(4-1);
+ }
+ }
+ db_printf("\n");
+ return (loc);
+}
+
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