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Date: Fri, 15 Aug 2008 21:41:46 -0600
From: jmerkey@...fmountaingroup.com
To: linux-kernel@...r.kernel.org
Subject: [PATCH 2.6.27-rc3 10/28] mdb: add ia32 disassembly support
added ia32 disassembler and branch detection.
Signed-off-by: Jeffrey Vernon Merkey (jmerkey@...fmountaingroup.com)
--- a/debug/mdb/mdb-ia32-support.c 1969-12-31 17:00:00.000000000 -0700
+++ b/debug/mdb/mdb-ia32-support.c 2008-08-15 15:41:57.000000000 -0600
@@ -0,0 +1,1935 @@
+
+/***************************************************************************
+*
+* Copyright (c) 2008 Jeff V. Merkey All Rights Reserved.
+* 1058 East 50 South
+* Lindon, Utah 84042
+* jmerkey@...fmountaingroup.com
+*
+* This program is free software; you can redistribute it and/or modify it
+* under the terms of the GNU General Public License as published by the
+* Free Software Foundation, version 2.
+*
+* This program is distributed in the hope that it will be useful, but
+* WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+* General Public License for more details.
+*
+* You are free to modify and re-distribute this program in accordance
+* with the terms specified in the GNU Public License. The copyright
+* contained in this code is required to be present in any derivative
+* works and you are required to provide the source code for this
+* program as part of any commercial or non-commercial distribution.
+* You are required to respect the rights of the Copyright holders
+* named within this code.
+*
+* jmerkey@...fmountaingroup.com is the official maintainer of
+* this code. You are encouraged to report any bugs, problems, fixes,
+* suggestions, and comments about this software.
+*
+* AUTHOR : Jeff V. Merkey
+* DESCRIP : Merkey's Linux Debugger
+*
+***************************************************************************/
+
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/genhd.h>
+#include <linux/hdreg.h>
+#include <linux/fs.h>
+#include <linux/major.h>
+#include <linux/mm.h>
+#include <linux/cdrom.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/ctype.h>
+#include <linux/keyboard.h>
+#include <linux/console.h>
+#include <linux/serial_reg.h>
+#include <linux/uaccess.h>
+#include <asm/system.h>
+#include <asm/segment.h>
+#include <asm/atomic.h>
+#include <asm/msr.h>
+#include <linux/io.h>
+
+#ifdef CONFIG_SMP
+#include <mach_apic.h>
+#include <mach_ipi.h>
+#endif
+
+#define __KERNEL_SYSCALLS__
+#include <linux/unistd.h>
+#include <linux/kallsyms.h>
+
+#include "mdb.h"
+#include "mdb-ia32.h"
+#include "mdb-list.h"
+#include "mdb-ia32-proc.h"
+#include "mdb-base.h"
+#include "mdb-proc.h"
+#include "mdb-os.h"
+#include "mdb-keyboard.h"
+
+#define mod(a) (((a) >> 6) & 7)
+#define reg(a) (((a) >> 3) & 7)
+#define rm(a) ((a) & 7)
+#define ss(a) (((a) >> 6) & 7)
+#define indx(a) (((a) >> 3) & 7)
+#define base(a) ((a) & 7)
+
+#define CF_FLAG 0x00000001
+#define PF_FLAG 0x00000004
+#define AF_FLAG 0x00000010
+#define ZF_FLAG 0x00000040
+#define SF_FLAG 0x00000080
+#define TF_FLAG 0x00000100
+#define IF_FLAG 0x00000200
+#define DF_FLAG 0x00000400
+#define OF_FLAG 0x00000800
+#define NT_FLAG 0x00004000
+#define RF_FLAG 0x00010000
+#define VM_FLAG 0x00020000
+#define AC_FLAG 0x00040000
+#define VIF_FLAG 0x00080000
+#define VIP_FLAG 0x00100000
+#define ID_FLAG 0x00200000
+
+short SegmentSize = 32;
+unsigned char buf[20];
+unsigned char *VirtualAddress;
+short bufp, bufe;
+unsigned char ubuf[4000], *ubufp;
+short Columns;
+unsigned char NoNameBuffer[100];
+short DefaultPickSign;
+short Prefix;
+signed int modrmv;
+signed int sibv;
+short OperandSize;
+short AddressSize;
+volatile unsigned long needs_proceed;
+volatile unsigned long jmp_active;
+short MODRMExtend;
+long DeRefValue;
+long pSize;
+extern unsigned long full_deref_toggle;
+extern unsigned long debug_deref;
+
+void ProcessInstruction(StackFrame *stackFrame, unsigned char *s);
+
+/* Percent tokens in strings:
+ First char after '%':
+ A - direct address
+ C - reg of r/m picks control register
+ D - reg of r/m picks debug register
+ E - r/m picks operand
+ F - flags register
+ G - reg of r/m picks general register
+ I - immediate data (takes extended size, data size)
+ J - relative IP offset
+ M - r/m picks memory
+ O - no r/m, offset only
+ R - mod of r/m picks register only
+ S - reg of r/m picks segment register
+ T - reg of r/m picks test register
+ X - DS:ESI
+ Y - ES:EDI
+ 2 - Prefix of two-byte opcode
+ e - put in 'e' if use32 (second char is part of reg name)
+ put in 'w' for use16 or 'd' for use32 (second char is 'w')
+ f - floating point (second char is esc value)
+ g - do r/m group 'n'
+ p - Prefix
+ s - size override (second char is a,o)
+ + - make default signed
+ Second char after '%':
+ a - two words in memory (BOUND)
+ b - byte
+ c - byte or word
+ d - dword
+ p - 32 or 48 bit pointer
+ s - six byte pseudo-descriptor
+ v - word or dword
+ w - word
+ F - use floating regs in mod/rm
+ + - always sign
+ - - sign if negative
+ 1-8 - group number, esc value, etc
+*/
+
+unsigned char *opmap1[] =
+{
+ /* 0 */
+ "ADD %Eb,%Gb", "ADD %Ev,%Gv", "ADD %Gb,%Eb", "ADD %Gv,%Ev",
+ "ADD AL,%I-bb", "ADD %eAX,%I-vv", "PUSH ES", "POP ES",
+ "OR %Eb,%Gb", "OR %Ev,%Gv", "OR %Gb,%Eb", "OR %Gv,%Ev",
+ "OR AL,%Ibb", "OR %eAX,%Ivv", "PUSH CS", "%2 ",
+ /* 1 */
+ "ADC %Eb,%Gb", "ADC %Ev,%Gv", "ADC %Gb,%Eb", "ADC %Gv,%Ev",
+ "ADC AL,%I-bb", "ADC %eAX,%I-vv", "PUSH SS", "POP SS",
+ "SBB %Eb,%Gb", "SBB %Ev,%Gv", "SBB %Gb,%Eb", "SBB %Gv,%Ev",
+ "SBB AL,%I-bb", "SBB %eAX,%I-vv", "PUSH DS", "POP DS",
+ /* 2 */
+ "AND %Eb,%Gb", "AND %Ev,%Gv", "AND %Gb,%Eb", "AND %Gv,%Ev",
+ "AND AL,%Ibb", "AND %eAX,%Ivv", "%pe", "DAA",
+ "SUB %Eb,%Gb", "SUB %Ev,%Gv", "SUB %Gb,%Eb", "SUB %Gv,%Ev",
+ "SUB AL,%I-bb", "SUB %eAX,%I-vv", "%pc", "DAS",
+ /* 3 */
+ "XOR %Eb,%Gb", "XOR %Ev,%Gv", "XOR %Gb,%Eb", "XOR %Gv,%Ev",
+ "XOR AL,%Ibb", "XOR %eAX,%Ivv", "%ps", "AAA",
+ "CMP %Eb,%Gb", "CMP %Ev,%Gv", "CMP %Gb,%Eb", "CMP %Gv,%Ev",
+ "CMP AL,%I-bb", "CMP %eAX,%I-vv", "%pd", "AAS",
+ /* 4 */
+ "INC %eAX", "INC %eCX", "INC %eDX", "INC %eBX",
+ "INC %eSP", "INC %eBP", "INC %eSI", "INC %eDI",
+ "DEC %eAX", "DEC %eCX", "DEC %eDX", "DEC %eBX",
+ "DEC %eSP", "DEC %eBP", "DEC %eSI", "DEC %eDI",
+ /* 5 */
+ "PUSH %eAX", "PUSH %eCX", "PUSH %eDX", "PUSH %eBX",
+ "PUSH %eSP", "PUSH %eBP", "PUSH %eSI", "PUSH %eDI",
+ "POP %eAX", "POP %eCX", "POP %eDX", "POP %eBX",
+ "POP %eSP", "POP %eBP", "POP %eSI", "POP %eDI",
+ /* 6 */
+ "PUSHA", "POPA", "BOUND %Gv,%Ma", "ARPL %Ew,%Rw",
+ "%pf", "%pg", "%so", "%sa",
+ "PUSH %I-vv", "IMUL %Gv=%Ev*%I-vv", "PUSH %I-vb","IMUL %Gv=%Ev*%I-vb",
+ "INSB %Yb,DX", "INS%ew %Yv,DX", "OUTSB DX,%Xb", "OUTS%ew DX,%Xv",
+ /* 7 */
+ "JO %Jb", "JNO %Jb", "JC %Jb", "JNC %Jb",
+ "JZ %Jb", "JNZ %Jb", "JBE %Jb", "JNBE %Jb",
+ "JS %Jb", "JNS %Jb", "JPE %Jb", "JPO %Jb",
+ "JL %Jb", "JGE %Jb", "JLE %Jb", "JG %Jb",
+ /* 8 */
+ "%g1 %Eb,%Ibb", "%g1 %Ev,%Ivv", 0, "%g1 %Ev,%Ivb",
+ "TEST %Eb,%Gb", "TEST %Ev,%Gv", "XCHG %Eb,%Gb", "XCHG %Ev,%Gv",
+ "MOV %Eb,%Gb", "MOV %Ev,%Gv", "MOV %Gb,%Eb", "MOV %Gv,%Ev",
+ "MOV %Ew,%Sw", "LEA %Gv,%M ", "MOV %Sw,%Ew", "POP %Ev",
+ /* 9 */
+ "NOP", "XCHG %eAX,%eCX", "XCHG %eAX,%eDX","XCHG %eAX,%eBX",
+ "XCHG %eAX,%eSP","XCHG %eAX,%eBP", "XCHG %eAX,%eSI","XCHG %eAX,%eDI",
+ "CBW", "CWD", "CALL %Ap", "FWAIT",
+ "PUSH %eFLAGS", "POP %eFLAGS", "SAHF", "LAHF",
+ /* a */
+ "MOV AL,%Ob", "MOV %eAX,%Ov", "MOV %Ob,AL", "MOV %Ov,%eAX",
+ "MOVSB %Xb,%Yb", "MOVS%ew %Xv,%Yv","CMPSB %Xb,%Yb", "CMPS%ew %Xv,%Yv",
+ "TEST AL,%Ibb", "TEST %eAX,%Ivv", "STOSB %Yb,AL", "STOS%ew %Yv,%eAX",
+ "LODSB AL,%Xb", "LODS%ew %eAX,%Xv","SCASB AL,%Xb", "SCAS%ew %eAX,%Xv",
+ /* b */
+ "MOV AL,%Ibb", "MOV CL,%Ibb", "MOV DL,%Ibb", "MOV BL,%Ibb",
+ "MOV AH,%Ibb", "MOV CH,%Ibb", "MOV DH,%Ibb", "MOV BH,%Ibb",
+ "MOV %eAX,%I-vv","MOV %eCX,%I-vv", "MOV %eDX,%I-vv","MOV %eBX,%I-vv",
+ "MOV %eSP,%Ivv", "MOV %eBP,%Ivv", "MOV %eSI,%I-vv","MOV %eDI,%I-vv",
+ /* c */
+ "%g2 %Eb,%Ibb", "%g2 %Ev,%Ibb", "RET %Iw", "RET",
+ "LES %Gv,%Mp", "LDS %Gv,%Mp", "MOV %Eb,%Ibb", "MOV %Ev,%I-vv",
+ "ENTER %Iww,%Ibb","LEAVE", "RETF %Iww", "RETF",
+ "INT 3", "INT %Ibb", "INTO", "IRET",
+ /* d */
+ "%g2 %Eb,1", "%g2 %Ev,1", "%g2 %Eb,CL", "%g2 %Ev,CL",
+ "AAM %Ibb", "AAD %Ibb", 0, "XLAT",
+ "%f0", "%f1", "%f2", "%f3",
+ "%f4", "%f5", "%f6", "%f7",
+ /* e */
+ "LOOPNE %Jb", "LOOPE %Jb", "LOOP %Jb", "JCXZ %Jb",
+ "IN AL,%Ibb", "IN %eAX,%Ibb", "OUT %Ibb,AL", "OUT %Ibb,%eAX",
+ "CALL %Jv", "JMP %Jv", "JMP %Ap", "JMP(S) %Jb",
+ "IN AL,DX", "IN %eAX,DX", "OUT DX,AL", "OUT DX,%eAX",
+ /* f */
+ "LOCK %p ", 0, "REPNE %p ", "REP(E) %p ",
+ "HLT", "CMC", "%g3", "%g0",
+ "CLC", "STC", "CLI", "STI",
+ "CLD", "STD", "%g4", "%g5"
+};
+
+unsigned char *second[] =
+{
+ /* 0 */
+ "%g6", "%g7", "LAR %Gv,%Ew", "LSL %Gv,%Ew",
+ 0, 0, "CLTS", 0,
+ "INVD", "WBINV", 0, "UD2A",
+ 0, "%y0", "FEMMS", 0,
+ /* 1 */
+ "%z8", "%z9", "MOVLPS", "MOVLPS",
+ "UNPCKLPS", "UNPCKHPS", "MOVHPS", "MOVHPS",
+ "%g14", 0, 0, 0,
+ 0, 0, 0, 0,
+ /* 2 */
+ "MOV %Rd,%Cd", "MOV %Rd,%Dd", "MOV %Cd,%Rd", "MOV %Dd,%Rd",
+ "MOV %Rd,%Td", 0, "MOV %Td,%Rd", 0,
+ "MOVAPS", "MOVAPS", "%z2", "MOVNTPS",
+ "%z4", "%z3", "UCOMISS", "COMISS",
+ /* 3 */
+ "WRMSR MSR[ECX],EDX:EAX", "RDTSC", "RDMSR EDX:EAX,MSR[ECX]", "RDPMC",
+ "SYSENTER", "SYSEXIT", 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ /* 4 */
+ "CMOVO %Gv,%Ev", "CMOVNO %Gv,%Ev", "CMOVB %Gv,%Ev", "CMOVAE %Gv,%Ev",
+ "CMOVE %Gv,%Ev", "CMOVNE %Gv,%Ev", "CMOVBE %Gv,%Ev", "CMOVA %Gv,%Ev",
+ "CMOVS %Gv,%Ev", "CMOVNS %Gv,%Ev", "CMOVP %Gv,%Ev", "CMOVNP %Gv,%Ev",
+ "CMOVL %Gv,%Ev", "CMOVGE %Gv,%Ev", "CMOVLE %Gv,%Ev", "CMOVG %Gv,%Ev",
+ /* 5 */
+ "MOVMSKPS", "%z13", "%z12", "%z11",
+ "ANDPS", "ANDNPS", "ORPS", "XORPS",
+ "%z0", "%z10", 0, 0,
+ "%z14", "%z7", "%z5", "%z6",
+ /* 6 */
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, "MOVD %Pd,%Ed", "MOVQ %Pq,%Qq",
+ /* 7 */
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, "MOVD %Ed,%Pd", "MOVQ %Qq,%Pq",
+ /* 8 */
+ "JO %Jv", "JNO %Jv", "JC %Jv", "JNC %Jv",
+ "JZ %Jv", "JNZ %Jv", "JBE %Jv", "JNBE %Jv",
+ "JS %Jv", "JNS %Jv", "JPE %Jv", "JPO %Jv",
+ "JL %Jv", "JGE %Jv", "JLE %Jv", "JG %Jv",
+ /* 9 */
+ "SETO %Eb", "SETNO %Eb", "SETC %Eb", "SETNC %Eb",
+ "SETZ %Eb", "SETNZ %Eb", "SETBE %Eb", "SETNBE %Eb",
+ "SETS %Eb", "SETNS %Eb", "SETP %Eb", "SETNP %Eb",
+ "SETL %Eb", "SETGE %Eb", "SETLE %Eb", "SETG %Eb",
+ /* a */
+ "PUSH FS", "POP FS", "CPUID", "BT %Ev,%Gv",
+ "SHLD %Ev,%Gv,%Ibb","SHLD %Ev,%Gv,CL", 0, 0,
+ "PUSH GS", "POP GS", "RSM", "BTS %Ev,%Gv",
+ "SHRD %Ev,%Gv,%Ibb","SHRD %Ev,%Gv,CL", 0, "IMUL %Gv,%Ev",
+
+ /* b */
+ "CMPXCHG %Eb,%Gb", "CMPXCHG %Ev,%Gv", "LSS %Mp", "BTR %Ev,%Gv",
+ "LFS %Mp", "LGS %Mp", "MOVZX %Gv,%Eb", "MOVZX %Gv,%Ew",
+ 0, "UD2B", "%g8 %Ev,%Ibb", "BTC %Ev,%Gv",
+ "BSF %Gv,%Ev", "BSR %Gv,%Ev", "MOVSX %Gv,%Eb", "MOVSX %Gv,%Ew",
+
+ /* c */
+ "XADD %Eb,%Gb", "XADD %Ev,%Gv", 0, 0,
+ 0, 0, 0, "%g9",
+ "BSWAP %eAX", "BSWAP %eCX", "BSWAP %eDX", "BSWAP %eBX",
+ "BSWAP %eSP", "BSWAP %eBP", "BSWAP %eSI", "BSWAP %eDI",
+ /* d */
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ /* e */
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ /* f */
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0
+
+};
+
+unsigned char *groups[][10] = { /* group 0 is group 3 for %Ev set */
+/* g0 */
+{ "TEST %Ev,%Ivv", "TEST %Ev,%Ivv,", "NOT %Ev", "NEG %Ev",
+ "MUL %eAX,%Ev", "IMUL %eAX,%Ev", "DIV %eAX,%Ev", "IDIV %eAX,%Ev" },
+
+/* g1 */
+{ "ADD%+-", "OR", "ADC%+-", "SBB%+-",
+ "AND", "SUB%+-", "XOR", "CMP%+-" },
+
+/* g2 */
+{ "ROL", "ROR", "RCL", "RCR",
+ "SHL", "SHR", "SHL", "SAR" },
+
+/* g3 */
+{ "TEST %Eb,%Ibb", "TEST %Eb,%Ibb,", "NOT %Eb", "NEG %Eb",
+ "MUL AL,%Eb", "IMUL AL,%Eb", "DIV AL,%Eb", "IDIV AL,%Eb" },
+
+/* g4 */
+{ "INC %Eb", "DEC %Eb", 0, 0,
+ 0, 0, 0, 0 },
+
+/* g5 */
+{ "INC %Ev", "DEC %Ev", "CALL %Ev", "CALL %Ep",
+ "JMP %Ev", "JMP %Ep", "PUSH %Ev", 0 },
+
+/* g6 */
+{ "SLDT %Ew", "STR %Ew", "LLDT %Ew", "LTR %Ew",
+ "VERR %Ew", "VERW %Ew", 0, 0 },
+
+/* g7 */
+{ "SGDT %Ms", "SIDT %Ms", "LGDT %Ms", "LIDT %Ms",
+ "SMSW %Ew", 0, "LMSW %Ew", "INVLPG" },
+
+/* g8 */
+{ 0, 0, 0, 0,
+ "BT", "BTS", "BTR", "BTC" },
+
+/* g9 */
+{ 0, "CMPXCH8B %Mq", 0, 0,
+ 0, 0, 0, 0 },
+
+/* g10 */
+{ 0, 0, 0, 0,
+ 0, 0, 0, 0 },
+
+};
+
+/* zero here means invalid. If first entry starts with '*', use st(i) */
+/* no assumed %EFs here. Indexed by rm(modrm()) */
+
+unsigned char *f0[] = {
+ 0, 0, 0, 0,
+ 0, 0, 0, 0
+};
+
+unsigned char *fop_9[] = {
+ "*FXCH ST,%GF" };
+
+unsigned char *fop_10[] = {
+ "FNOP", 0, 0, 0,
+ 0, 0, 0, 0 };
+
+unsigned char *fop_12[] = {
+ "FCHS", "FABS", 0, 0,
+ "FTST", "FXAM", 0, 0 };
+
+unsigned char *fop_13[] = {
+ "FLD1", "FLDL2T", "FLDL2E", "FLDPL",
+ "FLDLG2", "FLDLN2", "FLDZ", 0 };
+
+unsigned char *fop_14[] = {
+ "F2XM1", "FYL2X", "FPTAN", "FPATAN",
+ "FXTRACT", "FPREM1", "FDECSTP", "FINCSTP" };
+
+unsigned char *fop_15[] = {
+ "FPREM", "FYL2XP1", "FSQRT", "FSINCOS",
+ "FRNDINT", "FSCALE", "FSIN", "FCOS" };
+
+unsigned char *fop_21[] = {
+ 0, "FUCOMPP", 0, 0,
+ 0, 0, 0, 0 };
+
+unsigned char *fop_28[] = {
+ 0, 0, "FCLEX", "FINIT",
+ 0, 0, 0, 0 };
+
+unsigned char *fop_32[] = {
+ "*FADD %GF,ST" };
+
+unsigned char *fop_33[] = {
+ "*FMUL %GF,ST" };
+
+unsigned char *fop_36[] = {
+ "*FSUBR %GF,ST" };
+
+unsigned char *fop_37[] = {
+ "*FSUB %GF,ST" };
+
+unsigned char *fop_38[] = {
+ "*FDIVR %GF,ST" };
+
+unsigned char *fop_39[] = {
+ "*FDIV %GF,ST" };
+
+unsigned char *fop_40[] = {
+ "*FFREE %GF" };
+
+unsigned char *fop_42[] = { "*FST %GF" };
+
+unsigned char *fop_43[] = { "*FSTP %GF" };
+
+unsigned char *fop_44[] = { "*FUCOM %GF" };
+
+unsigned char *fop_45[] = { "*FUCOMP %GF" };
+
+unsigned char *fop_48[] = { "*FADDP %GF,ST" };
+
+unsigned char *fop_49[] = { "*FMULP %GF,ST" };
+
+unsigned char *fop_51[] = { 0, "FCOMPP", 0, 0, 0, 0, 0, 0 };
+
+unsigned char *fop_52[] = { "*FSUBRP %GF,ST" };
+
+unsigned char *fop_53[] = { "*FSUBP %GF,ST" };
+
+unsigned char *fop_54[] = { "*FDIVRP %GF,ST" };
+
+unsigned char *fop_55[] = { "*FDIVP %GF,ST" };
+
+unsigned char *fop_60[] = { "FSTSW AX", 0, 0, 0, 0, 0, 0, 0 };
+
+unsigned char **fspecial[] = { /* 0=use st(i), 1=undefined 0 in fop_* means undefined */
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, fop_9, fop_10, 0, fop_12, fop_13, fop_14, fop_15,
+ f0, f0, f0, f0, f0, fop_21, f0, f0,
+ f0, f0, f0, f0, fop_28, f0, f0, f0,
+ fop_32, fop_33, f0, f0, fop_36, fop_37, fop_38, fop_39,
+ fop_40, f0, fop_42, fop_43, fop_44, fop_45, f0, f0,
+ fop_48, fop_49, f0, fop_51, fop_52, fop_53, fop_54, fop_55,
+ f0, f0, f0, f0, fop_60, f0, f0, f0,
+ };
+
+unsigned char *floatops[] = { /* assumed " %EF" at end of each. mod != 3 only */
+/*00*/ "FADD", "FMUL", "FCOM", "FCOMP",
+ "FSUB", "FSUBR", "FDIV", "FDIVR",
+/*08*/ "FLD", 0, "FST", "FSTP",
+ "FLDENV", "FLDCW", "FSTENV", "FSTCW",
+/*16*/ "FIADD", "FIMUL", "FICOMW", "FICOMPW",
+ "FISUB", "FISUBR", "FIDIV", "FIDIVR",
+/*24*/ "FILD", 0, "FIST", "FISTP",
+ "FRSTOR", "FLDT", 0, "FSTPT",
+/*32*/ "FADDQ", "FMULQ", "FCOMQ", "FCOMPQ",
+ "FSUBQ", "FSUBRQ", "FDIVQ", "FDIVRQ",
+/*40*/ "FLDQ", 0, "FSTQ", "FSTPQ",
+ "FRESTOR", 0, "FSAVE", "FSTSW",
+/*48*/ "FIADDW", "FIMULW", "FICOMW", "FICOMPW",
+ "FISUBW", "FISUBRW", "FIDIVW", "FIDIVR",
+/*56*/ "FILDW", 0, "FISTW", "FISTPW",
+ "FBLDT", "FILDQ", "FBSTPT", "FISTPQ"
+};
+
+
+unsigned char *reg_names[3][8]={
+ {"AL","CL","DL","BL","AH","CH","DH","BH"},
+ {"AX","CX","DX","BX","SP","BP","SI","DI"},
+ {"EAX", /* 0 */
+ "ECX", /* 1 */
+ "EDX", /* 2 */
+ "EBX", /* 3 */
+ "ESP", /* 4 */
+ "EBP", /* 5 */
+ "ESI", /* 6 */
+ "EDI"} /* 7 */
+ };
+
+unsigned char *r_str[] = {
+ "BX+SI",
+ "BX+DI",
+ "BP+SI",
+ "BP+DI",
+ "SI",
+ "DI",
+ "BP",
+ "BX"
+};
+
+unsigned char *formats[5][4] = {
+ {"%08X", "%08X", "%08z", "%08z" },
+ {"%02X", "%02X", "%02z", "%02z" },
+ {"%04X", "%04X", "%04z", "%04z" },
+ {"%08X", "%08X", "%08z", "%08z" },
+ {"%08X", "%08X", "%08z", "%08z" } };
+
+unsigned char *i_str[] = {
+ "+EAX", /* 0 */
+ "+ECX", /* 1 */
+ "+EDX", /* 2 */
+ "+EBX", /* 3 */
+ "", /* 4 */
+ "+EBP", /* 5 */
+ "+ESI", /* 6 */
+ "+EDI" /* 7 */
+};
+
+unsigned char *sib_str[] = {
+ "%p:[EAX", /* 0 */
+ "%p:[ECX", /* 1 */
+ "%p:[EDX", /* 2 */
+ "%p:[EBX", /* 3 */
+ "%p:[ESP", /* 4 */
+ 0, /* 5 */
+ "%p:[ESI", /* 6 */
+ "%p:[EDI" /* 7 */
+};
+
+long reg_get_value(unsigned long index, StackFrame *stackFrame)
+{
+ if (!stackFrame)
+ return 0;
+
+ switch (index)
+ {
+ case 0:
+ return stackFrame->tEAX;
+
+ case 1:
+ return stackFrame->tECX;
+
+ case 2:
+ return stackFrame->tEDX;
+
+ case 3:
+ return stackFrame->tEBX;
+
+ case 4:
+ return stackFrame->tESP;
+
+ case 5:
+ return stackFrame->tEBP;
+
+ case 6:
+ return stackFrame->tESI;
+
+ case 7:
+ return stackFrame->tEDI;
+
+ default:
+ return 0;
+ }
+}
+
+long sib_get_value(unsigned long index, StackFrame *stackFrame)
+{
+ if (!stackFrame)
+ return 0;
+
+ switch (index)
+ {
+ case 0:
+ return stackFrame->tEAX;
+
+ case 1:
+ return stackFrame->tECX;
+
+ case 2:
+ return stackFrame->tEDX;
+
+ case 3:
+ return stackFrame->tEBX;
+
+ case 4:
+ return stackFrame->tESP;
+
+ case 6:
+ return stackFrame->tESI;
+
+ case 7:
+ return stackFrame->tEDI;
+
+ case 5:
+ default:
+ return 0;
+ }
+}
+
+long istr_get_value(unsigned long index, StackFrame *stackFrame)
+{
+ if (!stackFrame)
+ return 0;
+
+ switch (index)
+ {
+ case 0:
+ return stackFrame->tEAX;
+
+ case 1:
+ return stackFrame->tECX;
+
+ case 2:
+ return stackFrame->tEDX;
+
+ case 3:
+ return stackFrame->tEBX;
+
+ case 5:
+ return stackFrame->tEBP;
+
+ case 6:
+ return stackFrame->tESI;
+
+ case 7:
+ return stackFrame->tEDI;
+
+ case 4:
+ default:
+ return 0;
+ }
+}
+
+
+unsigned char *output_address(void *val, unsigned long *delta)
+{
+ unsigned char *symbolName;
+ unsigned char *moduleName;
+ register int c = get_processor_id();
+
+ if (delta)
+ *delta = 0;
+
+ symbolName = GetSymbolFromValue((unsigned long) val, &symbuf[c][0],
+ MAX_SYMBOL_LEN);
+ if (symbolName)
+ {
+ moduleName = GetModuleInfoFromSymbolValue((unsigned long) val, &modbuf[c][0],
+ MAX_SYMBOL_LEN);
+ if (moduleName)
+ sprintf(NoNameBuffer, "%s|%s=%08X", moduleName, symbolName,
+ (unsigned)val);
+ else
+ sprintf(NoNameBuffer, "%s=%08X", symbolName, (unsigned)val);
+ }
+ else
+ sprintf(NoNameBuffer, "%08X", (unsigned)val);
+
+ return NoNameBuffer;
+
+}
+
+unsigned char *output_jmp_address(StackFrame *stackFrame, long val, long *delta)
+{
+
+ unsigned char *symbolName;
+ unsigned char *moduleName;
+ long va = (long) VirtualAddress;
+ long v;
+ long segment, offset, sym_offset = 0;
+ register int c = get_processor_id();
+
+ if (delta)
+ *delta = 0;
+
+ if (!stackFrame)
+ return NoNameBuffer;
+
+ if ((!strncmp(ubuf, "JBE", 3) &&
+ ((stackFrame->tSystemFlags & ZF_FLAG) ||
+ (stackFrame->tSystemFlags & CF_FLAG))) ||
+
+ (!strncmp(ubuf, "JCXZ", 4) &&
+ (!stackFrame->tECX)) ||
+
+ (!strncmp(ubuf, "JC", 2) &&
+ (stackFrame->tSystemFlags & CF_FLAG)) ||
+
+ (!strncmp(ubuf, "JLE", 3) &&
+ ((stackFrame->tSystemFlags & ZF_FLAG) ||
+ ((stackFrame->tSystemFlags & ~SF_FLAG) !=
+ (stackFrame->tSystemFlags & ~OF_FLAG)))) ||
+
+ (!strncmp(ubuf, "JL", 2) &&
+ ((stackFrame->tSystemFlags & ~SF_FLAG) !=
+ (stackFrame->tSystemFlags & ~OF_FLAG))) ||
+
+ (!strncmp(ubuf, "JMP", 3)) ||
+
+ (!strncmp(ubuf, "JGE", 3) &&
+ ((stackFrame->tSystemFlags & ~SF_FLAG) ==
+ (stackFrame->tSystemFlags & ~OF_FLAG))) ||
+
+ (!strncmp(ubuf, "JG", 2) &&
+ ((!(stackFrame->tSystemFlags & ZF_FLAG)) &&
+ ((stackFrame->tSystemFlags & ~SF_FLAG) ==
+ (stackFrame->tSystemFlags & ~OF_FLAG)))) ||
+
+ (!strncmp(ubuf, "JNBE", 4) &&
+ (!(stackFrame->tSystemFlags & CF_FLAG)) &&
+ (!(stackFrame->tSystemFlags & ZF_FLAG))) ||
+
+ (!strncmp(ubuf, "JNO", 3) &&
+ (!(stackFrame->tSystemFlags & OF_FLAG))) ||
+
+ (!strncmp(ubuf, "JNC", 3) &&
+ (!(stackFrame->tSystemFlags & CF_FLAG))) ||
+
+ (!strncmp(ubuf, "JNZ", 3) &&
+ (!(stackFrame->tSystemFlags & ZF_FLAG))) ||
+
+ (!strncmp(ubuf, "JNS", 3) &&
+ (!(stackFrame->tSystemFlags & SF_FLAG))) ||
+
+ (!strncmp(ubuf, "JO", 2) &&
+ (stackFrame->tSystemFlags & OF_FLAG)) ||
+
+ (!strncmp(ubuf, "JPE", 3) &&
+ (stackFrame->tSystemFlags & PF_FLAG)) ||
+
+ (!strncmp(ubuf, "JPO", 3) &&
+ (!(stackFrame->tSystemFlags & PF_FLAG))) ||
+
+ (!strncmp(ubuf, "JS", 2) &&
+ (stackFrame->tSystemFlags & SF_FLAG)) ||
+
+ (!strncmp(ubuf, "JZ", 2) &&
+ (stackFrame->tSystemFlags & ZF_FLAG)) ||
+
+ (!strncmp(ubuf, "LOOPNE", 6) &&
+ (stackFrame->tECX) &&
+ (!(stackFrame->tSystemFlags & ZF_FLAG))) ||
+
+ (!strncmp(ubuf, "LOOPE", 5) &&
+ (stackFrame->tECX) &&
+ (stackFrame->tSystemFlags & ZF_FLAG)) ||
+
+ (!strncmp(ubuf, "LOOP", 4)))
+ {
+ jmp_active = 1;
+ if (SegmentSize == 32)
+ {
+ symbolName = GetSymbolFromValueWithOffset(val + va, &sym_offset,
+ &symbuf[c][0], MAX_SYMBOL_LEN);
+ if (symbolName)
+ {
+ moduleName = GetModuleInfoFromSymbolValue(val + va, &modbuf[c][0],
+ MAX_SYMBOL_LEN);
+ if (moduleName)
+ {
+ if (sym_offset)
+ sprintf(NoNameBuffer, "%s|%s+0x%X=%08X %c",
+ moduleName, symbolName,
+ (unsigned)sym_offset, (unsigned)(val + va),
+ ((val + va) < va) ? 0x18 : 0x19);
+ else
+ sprintf(NoNameBuffer, "%s|%s=%08X %c",
+ moduleName, symbolName,
+ (unsigned)(val + va),
+ ((val + va) < va) ? 0x18 : 0x19);
+ }
+ else
+ {
+ if (sym_offset)
+ sprintf(NoNameBuffer, "%s+0x%X=%08X %c", symbolName,
+ (unsigned)sym_offset, (unsigned)(val + va),
+ ((val + va) < va) ? 0x18 : 0x19);
+ else
+ sprintf(NoNameBuffer, "%s=%08X %c", symbolName,
+ (unsigned)(val + va),
+ ((val + va) < va) ? 0x18 : 0x19);
+ }
+ }
+ else
+ sprintf(NoNameBuffer, "%08X %c",
+ (unsigned)(val + va),
+ ((val + va) < va) ? 0x18 : 0x19);
+ }
+ else
+ {
+ symbolName = GetSymbolFromValueWithOffset(val + va, &sym_offset,
+ &symbuf[c][0], MAX_SYMBOL_LEN);
+ if (symbolName)
+ {
+ moduleName = GetModuleInfoFromSymbolValue(val + va, &modbuf[c][0],
+ MAX_SYMBOL_LEN);
+ if (moduleName)
+ {
+ if (sym_offset)
+ sprintf(NoNameBuffer, "%s|%s+0x%X=%08X %c",
+ moduleName, symbolName,
+ (unsigned)sym_offset, (unsigned)(val + va),
+ ((val + va) < va) ? 0x18 : 0x19);
+ else
+ sprintf(NoNameBuffer, "%s|%s=%08X %c",
+ moduleName, symbolName,
+ (unsigned)(val + va),
+ ((val + va) < va) ? 0x18 : 0x19);
+ }
+ else
+ {
+ if (sym_offset)
+ sprintf(NoNameBuffer, "%s+0x%X=%08X %c", symbolName,
+ (unsigned)sym_offset, (unsigned)(val + va),
+ ((val + va) < va) ? 0x18 : 0x19);
+ else
+ sprintf(NoNameBuffer, "%s=%08X %c", symbolName,
+ (unsigned)(val + va),
+ ((val + va) < va) ? 0x18 : 0x19);
+ }
+ }
+ else
+ {
+ v = val + va;
+ segment = (((unsigned long)v >> 4) & 0x0000FFFF);
+ offset = ((unsigned long)v & 0x0000000F);
+ sprintf(NoNameBuffer, "%04X:%04X %c",
+ (unsigned)segment, (unsigned)offset,
+ ((val + va) < va) ? 0x18 : 0x19);
+ }
+ }
+ }
+ else
+ {
+ if (SegmentSize == 32)
+ {
+ symbolName = GetSymbolFromValueWithOffset(val + va, &sym_offset,
+ &symbuf[c][0], MAX_SYMBOL_LEN);
+ if (symbolName)
+ {
+ moduleName = GetModuleInfoFromSymbolValue(val + va, &modbuf[c][0],
+ MAX_SYMBOL_LEN);
+ if (moduleName)
+ {
+ if (sym_offset)
+ sprintf(NoNameBuffer, "%s|%s+0x%X=%08X",
+ moduleName, symbolName,
+ (unsigned)sym_offset, (unsigned)(val + va));
+ else
+ sprintf(NoNameBuffer, "%s|%s=%08X",
+ moduleName, symbolName,
+ (unsigned)(val + va));
+ }
+ else
+ {
+ if (sym_offset)
+ sprintf(NoNameBuffer, "%s+0x%X=%08X", symbolName,
+ (unsigned)sym_offset, (unsigned)(val + va));
+ else
+ sprintf(NoNameBuffer, "%s=%08X", symbolName,
+ (unsigned)(val + va));
+ }
+ }
+ else
+ sprintf(NoNameBuffer, "%08X",
+ (unsigned)(val + va));
+ }
+ else
+ {
+ symbolName = GetSymbolFromValueWithOffset(val + va, &sym_offset,
+ &symbuf[c][0], MAX_SYMBOL_LEN);
+ if (symbolName)
+ {
+ moduleName = GetModuleInfoFromSymbolValue(val + va, &modbuf[c][0],
+ MAX_SYMBOL_LEN);
+ if (moduleName)
+ {
+ if (sym_offset)
+ sprintf(NoNameBuffer, "%s|%s+0x%X=%08X",
+ moduleName, symbolName,
+ (unsigned)sym_offset, (unsigned)(val + va));
+ else
+ sprintf(NoNameBuffer, "%s|%s=%08X",
+ moduleName, symbolName,
+ (unsigned)(val + va));
+ }
+ else
+ {
+ if (sym_offset)
+ sprintf(NoNameBuffer, "%s+0x%X=%08X", symbolName,
+ (unsigned)sym_offset, (unsigned)(val + va));
+ else
+ sprintf(NoNameBuffer, "%s=%08X", symbolName,
+ (unsigned)(val + va));
+ }
+ }
+ else
+ {
+ v = val + va;
+ segment = (((unsigned long)v >> 4) & 0x0000FFFF);
+ offset = ((unsigned long)v & 0x0000000F);
+ sprintf(NoNameBuffer, "%04X:%04X",
+ (unsigned)segment, (unsigned)offset);
+ }
+ }
+ }
+ return NoNameBuffer;
+
+}
+
+unsigned short read_memory(void *addr, void *buf, unsigned len)
+{
+ register unsigned long i;
+ register unsigned char *s = buf;
+
+ for (i=0; i < len; i++)
+ if (s)
+ s[i] = (unsigned char)mdb_getword((unsigned long)((unsigned long)addr + i), 1);
+ return 0;
+}
+
+unsigned char getbyte(void)
+{
+ short s;
+
+ if (bufp >= bufe)
+ {
+ s = 4; /* byte read window is 4 */
+ read_memory((void *)VirtualAddress, buf, s);
+ bufe = s;
+ bufp = 0;
+ }
+ VirtualAddress = (void *)((unsigned long) VirtualAddress + (unsigned long) 1);
+
+ DBGPrint("%02X", buf[bufp]);
+ Columns += 2;
+
+ return buf[bufp++];
+}
+
+unsigned short modrm(void)
+{
+ if (modrmv == -1)
+ modrmv = getbyte();
+
+ return modrmv;
+}
+
+unsigned short sib(void)
+{
+ if (sibv == -1)
+ sibv = getbyte();
+
+ return sibv;
+}
+
+void DebugPrint(char *s, ...)
+{
+ char **a = &s;
+
+ vsprintf(ubufp, s, (va_list)(a+1));
+
+ while (*ubufp) ubufp++;
+}
+
+void DebugPutChar(unsigned char c)
+{
+ if (c == '\t')
+ {
+ do {
+ *ubufp++ = ' ';
+ } while ((ubufp-ubuf) % 8);
+ }
+ else
+ *ubufp++ = c;
+ *ubufp = 0;
+}
+
+unsigned long dereference_address(unsigned long addr, unsigned long width)
+{
+ register unsigned long retCode;
+
+ retCode = mdb_verify_rw((void *)addr, width);
+ if (full_deref_toggle)
+ {
+ switch (retCode)
+ {
+ case 0:
+ if (width == 1)
+ DebugPrint("=(*%08X=%02X)", addr, (unsigned char)mdb_getword(addr, 1));
+ else
+ if (width == 2)
+ DebugPrint("=(*%08X=%04X)", addr, (unsigned short)mdb_getword(addr, 2));
+ else
+ if (width == 4)
+ DebugPrint("=(*%08X=%08X)", addr, (unsigned long)mdb_getword(addr, 4));
+ else
+ DebugPrint("=(*%08X=?)", addr);
+ return retCode;
+
+ default:
+ if (width == 1)
+ DebugPrint("=(*%08X=?)", addr);
+ else
+ if (width == 2)
+ DebugPrint("=(*%08X=?)", addr);
+ else
+ if (width == 4)
+ DebugPrint("=(*%08X=?)", addr);
+ else
+ DebugPrint("=(*%08X=?)", addr);
+ return retCode;
+ }
+ }
+ else
+ {
+ switch (retCode)
+ {
+ case 0:
+ if (width == 1)
+ DebugPrint("=%02X", (unsigned char)mdb_getword(addr, 1));
+ else
+ if (width == 2)
+ DebugPrint("=%04X", (unsigned short)mdb_getword(addr, 2));
+ else
+ if (width == 4)
+ DebugPrint("=%08X", (unsigned long)mdb_getword(addr, 4));
+ else
+ DebugPrint("=?");
+ return retCode;
+
+ default:
+ if (width == 1)
+ DebugPrint("=?");
+ else
+ if (width == 2)
+ DebugPrint("=?");
+ else
+ if (width == 4)
+ DebugPrint("=?");
+ else
+ DebugPrint("=?");
+ return retCode;
+ }
+ }
+
+}
+
+short bytes(char c)
+{
+ switch (c)
+ {
+ case 'b':
+ return 1;
+
+ case 'w':
+ return 2;
+
+ case 'd':
+ return 4;
+
+ case 'v':
+ if (OperandSize == 32)
+ return 4;
+ else
+ return 2;
+ }
+ return 0;
+
+}
+
+void OutputHex(char c, short extend, short optional, short defsize,
+ short sign, long *deref)
+{
+
+ unsigned char *fmt, *p;
+ short n=0, s=0, i;
+ long delta;
+ unsigned char buf1[6];
+ unsigned char *name;
+ unsigned char fmt2[16];
+
+ fmt = formats[0][sign];
+
+ if (deref) {};
+
+ switch (c)
+ {
+ case 'a':
+ break;
+
+ case 'b':
+ n = 1;
+ break;
+
+ case 'w':
+ n = 2;
+ break;
+
+ case 'd':
+ n = 4;
+ break;
+
+ case 's':
+ n = 6;
+ break;
+
+ case 'c':
+ case 'v':
+ if (defsize == 32)
+ n = 4;
+ else
+ n = 2;
+ break;
+
+ case 'p':
+ if (defsize == 32)
+ n = 6;
+ else
+ n = 4;
+ s = 1;
+ break;
+
+ case 'x':
+ return;
+ }
+
+ for (i = 0; i < n; i++)
+ buf1[i] = getbyte();
+
+ for (; i < extend; i++)
+ buf1[i] = (buf[i-1] & 0x80) ? 0xff : 0;
+
+ if (s)
+ {
+ DebugPrint("%02X%02X:", buf1[n-1], buf1[n-2]);
+ n -= 2;
+ }
+ switch (n)
+ {
+ case 1:
+ delta = *(char *)buf1;
+ break;
+
+ case 2:
+ delta = *(short *)buf1;
+ break;
+
+ case 4:
+ delta = *(long *)buf1;
+ break;
+ }
+ if (extend > n)
+ {
+ if (delta || !optional)
+ {
+ if (extend <= 4)
+ fmt = formats[extend][sign];
+
+ if (deref)
+ *deref += delta;
+
+ p = strchr(fmt, 'z');
+ if (p)
+ {
+ strcpy(fmt2, fmt);
+ p = strchr(fmt2, 'z');
+ if (delta < 0)
+ DebugPrint("-", delta);
+ else
+ DebugPrint("+", delta);
+ *p = 'X';
+ DebugPrint(fmt2, delta);
+ }
+ else
+ DebugPrint(fmt, delta);
+ }
+ return;
+ }
+ if ((n == 4) && sign < 2)
+ {
+ if (deref)
+ *deref += delta;
+
+ name = output_address((void *)delta, (unsigned long *) &delta);
+ if (name)
+ {
+ DebugPrint("%s", name);
+ if (delta)
+ DebugPrint("+%X", delta);
+ return;
+ }
+ }
+ switch (n)
+ {
+
+ case 1:
+ fmt = formats[n][sign];
+
+ p = strchr(fmt, 'z');
+ if (p)
+ {
+ strcpy(fmt2, fmt);
+ p = strchr(fmt2, 'z');
+ if (delta < 0)
+ DebugPrint("-", delta);
+ else
+ DebugPrint("+", delta);
+ *p = 'X';
+ DebugPrint(fmt2, (char) delta);
+ }
+ else
+ DebugPrint(fmt, (char) delta);
+
+ if (deref)
+ *deref += (delta & 0xFF);
+
+ break;
+
+ case 2:
+ fmt = formats[n][sign];
+
+ p = strchr(fmt, 'z');
+ if (p)
+ {
+ strcpy(fmt2, fmt);
+ p = strchr(fmt2, 'z');
+ if (delta < 0)
+ DebugPrint("-", delta);
+ else
+ DebugPrint("+", delta);
+ *p = 'X';
+ DebugPrint(fmt2, (unsigned short) delta);
+ }
+ else
+ DebugPrint(fmt, (unsigned short) delta);
+
+ if (deref)
+ *deref += (delta & 0xFFFF);
+
+ break;
+
+ case 4:
+ fmt = formats[n][sign];
+
+ p = strchr(fmt, 'z');
+ if (p)
+ {
+ strcpy(fmt2, fmt);
+ p = strchr(fmt2, 'z');
+ if (delta < 0)
+ DebugPrint("-");
+ else
+ DebugPrint("+");
+ *p = 'X';
+ DebugPrint(fmt2, (unsigned long) delta);
+ }
+ else
+ DebugPrint(fmt, (unsigned long) delta);
+
+ if (deref)
+ *deref += delta;
+
+ break;
+ }
+
+}
+
+
+void reg_name(short which, char size)
+{
+
+ if (size == 'F')
+ {
+ DebugPrint("ST(%d)", which);
+ return;
+ }
+
+ if (((size == 'v') && (OperandSize == 32)) || (size == 'd'))
+ {
+ DebugPutChar('E');
+ }
+
+ if (size == 'b')
+ {
+ DebugPutChar("ACDBACDB"[which]);
+ DebugPutChar("LLLLHHHH"[which]);
+ }
+ else
+ {
+ DebugPutChar("ACDBSBSD"[which]);
+ DebugPutChar("XXXXPPII"[which]);
+ }
+
+}
+
+
+short do_sib(StackFrame *stackFrame, short m, long *deref)
+{
+
+ long sib_val, istr_val, factor, offset = 0;
+ short pick_signed = DefaultPickSign;
+ short s, i, b, extra=0;
+
+ s = ss(sib());
+ i = indx(sib());
+ b = base(sib());
+ if (b == 5)
+ {
+ if (m == 0)
+ {
+ if (deref)
+ *deref = 0;
+ ProcessInstruction(stackFrame, "%p:[");
+ OutputHex('d', pSize, 0, AddressSize, 1, deref);
+ }
+ else
+ {
+
+ if (debug_deref && stackFrame)
+ DebugPrint("<EBP=%08X>", stackFrame->tEBP);
+
+ if (deref && stackFrame)
+ *deref += stackFrame->tEBP;
+ ProcessInstruction(stackFrame, "%p:[EBP");
+ pick_signed |= 2;
+ }
+ }
+ else
+ {
+ pick_signed |= 2;
+ sib_val = sib_get_value(b, stackFrame);
+
+ if (debug_deref)
+ DebugPrint("<sib=%08X>", sib_val);
+
+ if (deref)
+ *deref += sib_val;
+
+ ProcessInstruction(stackFrame, sib_str[b]);
+ if ((b == i) && (b != 4) && (i != 5))
+ extra = 1;
+ }
+ if (extra == 0)
+ {
+ pick_signed |= 2;
+ istr_val = istr_get_value(i, stackFrame);
+
+ if (debug_deref)
+ DebugPrint("<istr=%08X>", istr_val);
+
+ offset += istr_val;
+
+ DebugPrint(i_str[i]);
+ }
+
+ if (i != 4 && s)
+ {
+ DebugPrint("*%X", (1 << s) + extra);
+ factor = (1 << s) + extra;
+
+ if (debug_deref)
+ DebugPrint("<factor=%08X>", factor);
+
+ offset = (offset * factor);
+ }
+
+ if (deref)
+ *deref += offset;
+
+ return pick_signed;
+
+}
+
+
+void do_modrm(StackFrame *stackFrame, char t)
+{
+
+ long reg_val;
+ short m = mod(modrm());
+ short r = rm(modrm());
+ short extend = (AddressSize == 32) ? 4 : 2;
+ short pick_signed = DefaultPickSign;
+
+ if (t == 'b')
+ pSize = 1;
+ else
+ if (t == 'v' && OperandSize == 32)
+ pSize = 4;
+ else
+ if (t == 'v' && OperandSize == 16)
+ pSize = 2;
+
+ if (m == 3)
+ {
+ reg_name(r, t);
+ return;
+ }
+ if ((m == 0) && (r == 5) && (AddressSize == 32))
+ {
+ DeRefValue = 0;
+ ProcessInstruction(stackFrame, "%p:[");
+ OutputHex('d', extend, 0, AddressSize, 0, (long *) &DeRefValue);
+ DebugPutChar(']');
+ dereference_address(DeRefValue, pSize);
+ return;
+ }
+ if ((m == 0) && (r == 6) && (AddressSize == 16))
+ {
+ DeRefValue = 0;
+ ProcessInstruction(stackFrame, "%p:[");
+ OutputHex('w', extend, 0, AddressSize, 0, (long *) &DeRefValue);
+ DebugPutChar(']');
+ dereference_address(DeRefValue, pSize);
+ return;
+ }
+ if ((AddressSize != 32) || (r != 4))
+ {
+ DeRefValue = 0;
+ ProcessInstruction(stackFrame, "%p:[");
+ }
+
+ if (AddressSize == 16)
+ {
+ DebugPrint(r_str[r]);
+ pick_signed |= 2;
+ }
+ else
+ {
+ DeRefValue = 0;
+ if (r == 4)
+ pick_signed |= do_sib(stackFrame, m, (long *)&DeRefValue);
+ else
+ {
+ reg_val = reg_get_value(r, stackFrame);
+ DeRefValue += reg_val;
+
+ if (debug_deref)
+ DebugPrint("<%s=%08X>", reg_names[2][r], reg_val);
+
+ DebugPrint(reg_names[2][r]);
+ pick_signed |= 2;
+ }
+ }
+ MODRMExtend = extend;
+ OutputHex("xbv"[m], extend, 1, AddressSize, pick_signed, (long *) &DeRefValue);
+ DebugPutChar(']');
+ dereference_address(DeRefValue, pSize);
+
+}
+
+
+void floating_point(StackFrame *stackFrame, short e1)
+{
+
+ short esc = e1 * 8 + reg(modrm());
+
+ if (mod(modrm()) == 3)
+ {
+ if (fspecial[esc])
+ {
+ if (fspecial[esc][0] && (fspecial[esc][0][0] == '*'))
+ {
+ ProcessInstruction(stackFrame, fspecial[esc][0]+1);
+ }
+ else
+ {
+ ProcessInstruction(stackFrame, fspecial[esc][rm(modrm())]);
+ }
+ }
+ else
+ {
+ ProcessInstruction(stackFrame, floatops[esc]);
+ ProcessInstruction(stackFrame, " %EF");
+ }
+ }
+ else
+ {
+ ProcessInstruction(stackFrame, floatops[esc]);
+ ProcessInstruction(stackFrame, " %EF");
+ }
+}
+
+
+void percent(StackFrame *stackFrame, char c, unsigned char **tptr)
+{
+
+ long vofs, delta;
+ unsigned char *name;
+ short default_signed = DefaultPickSign;
+ char t = *(*tptr)++, it;
+ short extend = (AddressSize == 32) ? 4 : 2;
+ short iextend;
+
+ if (c != '+')
+ {
+ if (t == '-')
+ {
+ default_signed = 1;
+ t = *(*tptr)++;
+ }
+ else if (t == '+')
+ {
+ default_signed = 2;
+ t = *(*tptr)++;
+ }
+ }
+ switch (c)
+ {
+
+ case 'A':
+ OutputHex(t, extend, 0, AddressSize, 0, 0);
+ break;
+
+ case 'C':
+ DebugPrint("CR%d", reg(modrm()));
+ break;
+
+ case 'D':
+ DebugPrint("DR%d", reg(modrm()));
+ break;
+
+ case 'E':
+ do_modrm(stackFrame, t);
+ break;
+
+ case 'G':
+ if (t == 'F')
+ reg_name(rm(modrm()), t);
+ else
+ reg_name(reg(modrm()), t);
+ break;
+
+ case 'I':
+ switch (t)
+ {
+ case 'b':
+ iextend = 1;
+ it = *(*tptr)++;
+ OutputHex(it, iextend, 0, OperandSize, default_signed, 0);
+ break;
+
+ case 'v':
+ iextend = extend;
+ it = *(*tptr)++;
+ OutputHex(it, iextend, 0, OperandSize, default_signed, 0);
+ break;
+
+ default:
+ iextend = 0;
+ OutputHex(t, iextend, 0, OperandSize, default_signed, 0);
+ break;
+ }
+ break;
+
+ case 'J':
+ switch (bytes(t))
+ {
+
+ case 1:
+ vofs = (char) getbyte();
+ break;
+
+ case 2:
+ vofs = getbyte();
+ vofs += getbyte() << 8;
+ vofs = (int) vofs;
+ break;
+
+ case 4:
+ vofs = (long)getbyte();
+ vofs |= (long)getbyte() << 8;
+ vofs |= (long)getbyte() << 16;
+ vofs |= (long)getbyte() << 24;
+ break;
+
+ default:
+ vofs = 0; /* To avoid uninit error */
+ }
+
+ name = output_jmp_address(stackFrame, vofs, (long *) &delta);
+ DebugPrint("%s", name);
+
+ if (delta)
+ DebugPrint("+%X (%X %c)", delta, ((long)vofs +
+ (long)VirtualAddress),
+ (vofs & 0x80000000UL) ? 0x1e : 0x1f);
+ break;
+
+ case 'M':
+ do_modrm(stackFrame, t);
+ break;
+
+ case 'O':
+ if (t == 'b')
+ pSize = 1;
+ else
+ if (t == 'v' && OperandSize == 32)
+ pSize = 4;
+ else
+ if (t == 'v' && OperandSize == 16)
+ pSize = 2;
+ DeRefValue = 0;
+ ProcessInstruction(stackFrame, "%p:[");
+ OutputHex(t, extend, 0, AddressSize, 0, (long *) &DeRefValue);
+ DebugPutChar(']');
+ dereference_address(DeRefValue, pSize);
+ break;
+
+ case 'R':
+ do_modrm(stackFrame, t);
+ break;
+
+ case 'S':
+ DebugPutChar("ECSDFG"[reg(modrm())]);
+ DebugPutChar('S');
+ break;
+
+ case 'T':
+ DebugPrint("TR%d", reg(modrm()));
+ break;
+
+ case 'X':
+ if (t == 'b')
+ pSize = 1;
+ else
+ if (t == 'v' && OperandSize == 32)
+ pSize = 4;
+ else
+ if (t == 'v' && OperandSize == 16)
+ pSize = 2;
+ DebugPrint("DS:[");
+ if (AddressSize == 32)
+ DebugPutChar('E');
+ DebugPrint("SI");
+ if (AddressSize==32 && stackFrame)
+ DebugPrint("=%08X", stackFrame->tESI);
+ DebugPutChar(']');
+
+ if (debug_deref && stackFrame)
+ DebugPrint("<ESI=%08X>", stackFrame->tESI);
+
+ if (stackFrame)
+ dereference_address(stackFrame->tESI, pSize);
+ break;
+
+ case 'Y':
+ if (t == 'b')
+ pSize = 1;
+ else
+ if (t == 'v' && OperandSize == 32)
+ pSize = 4;
+ else
+ if (t == 'v' && OperandSize == 16)
+ pSize = 2;
+ DebugPrint("ES:[");
+ if (AddressSize == 32)
+ DebugPutChar('E');
+ DebugPrint("DI");
+ if (AddressSize==32 && stackFrame)
+ DebugPrint("=%08X", stackFrame->tEDI);
+ DebugPutChar(']');
+
+ if (debug_deref && stackFrame)
+ DebugPrint("<EDI=%08X>", stackFrame->tEDI);
+
+ if (stackFrame)
+ dereference_address(stackFrame->tEDI, pSize);
+ break;
+
+ case '2':
+ ProcessInstruction(stackFrame, second[getbyte()]);
+ break;
+
+ case 'e':
+ if (OperandSize == 32)
+ {
+ if (t == 'w')
+ DebugPutChar('D');
+ else
+ {
+ DebugPutChar('E');
+ DebugPutChar(toupper(t));
+ }
+ }
+ else
+ DebugPutChar(toupper(t));
+ break;
+
+ case 'f':
+ floating_point(stackFrame, t - '0');
+ break;
+
+ case 'g':
+ ProcessInstruction(stackFrame, groups[t - '0'][reg(modrm())]);
+ break;
+
+ case 'p':
+ switch (t)
+ {
+ case 'c':
+ case 'd':
+ case 'e':
+ case 'f':
+ case 'g':
+ case 's':
+ Prefix = t;
+ ProcessInstruction(stackFrame, opmap1[getbyte()]);
+ break;
+
+ case ':':
+ if (Prefix)
+ DebugPrint("%cS:", toupper(Prefix));
+ break;
+
+ case ' ':
+ ProcessInstruction(stackFrame, opmap1[getbyte()]);
+ break;
+
+ }
+ break;
+
+ case 's':
+ switch (t)
+ {
+ case 'a':
+ AddressSize = 48 - AddressSize;
+ ProcessInstruction(stackFrame, opmap1[getbyte()]);
+ break;
+
+ case 'o':
+ OperandSize = 48 - OperandSize;
+ ProcessInstruction(stackFrame, opmap1[getbyte()]);
+ break;
+ }
+ break;
+
+ case '+':
+ switch (t)
+ {
+
+ case '-':
+ DefaultPickSign = 1;
+ break;
+
+ case '+':
+ DefaultPickSign = 2;
+ break;
+
+ default:
+ DefaultPickSign = 0;
+ break;
+ }
+ }
+}
+
+unsigned long nestLevel;
+
+void ProcessInstruction(StackFrame *stackFrame, unsigned char *s)
+{
+
+ short c;
+
+ nestLevel++;
+ if (nestLevel > 5)
+ {
+ DebugPrint("<INVALID OPCODE [NESTED]>");
+ if (nestLevel)
+ nestLevel--;
+ return;
+ }
+
+ if (s == 0)
+ {
+ DebugPrint("<INVALID OPCODE>");
+ if (nestLevel)
+ nestLevel--;
+ return;
+ }
+
+ while ((c = *s++) != 0)
+ {
+ if (c == '%')
+ {
+ c = *s++;
+ percent(stackFrame, c, &s);
+ }
+ else
+ if (c == ' ')
+ DebugPutChar('\t');
+ else
+ DebugPutChar(c);
+ }
+ if (nestLevel)
+ nestLevel--;
+
+}
+
+unsigned long unassemble(StackFrame *stackFrame, unsigned long ip,
+ unsigned long use, unsigned long *ret)
+{
+
+ long delta;
+ long segment, offset;
+ unsigned char *v = (unsigned char *) ip;
+
+ if (use)
+ SegmentSize = 32;
+ else
+ SegmentSize = 16;
+
+ DefaultPickSign = 0;
+ needs_proceed = 0;
+ jmp_active = 0;
+ nestLevel = 0;
+ pSize = 4;
+
+ output_address((void *)v, (unsigned long *) &delta);
+
+ if (SegmentSize == 32)
+ {
+ DBGPrint("%08X ", (unsigned)v);
+ }
+ else
+ {
+ segment = (((unsigned long)v >> 4) & 0x0000FFFF);
+ offset = ((unsigned long)v & 0x0000000F);
+ DBGPrint("%04X:%04X ", (unsigned)segment, (unsigned)offset);
+ }
+
+ Prefix = 0;
+ modrmv = sibv = -1;
+ OperandSize = AddressSize = SegmentSize;
+ VirtualAddress = (void *)v;
+ bufp = bufe = 0;
+ Columns = 0;
+ ubufp = ubuf;
+ ProcessInstruction(stackFrame, opmap1[getbyte()]);
+
+ do
+ {
+ DBGPrint(" ");
+ Columns++;
+ } while (Columns < 15);
+
+ Columns += strlen(ubuf);
+
+ do
+ {
+ DebugPutChar(' ');
+ Columns++;
+ } while (Columns < 43);
+
+ if (ret)
+ *ret = (unsigned long)VirtualAddress;
+
+ if (DBGPrint("%s\n", ubuf)) return 1;
+
+ /*
+ * check for CALL, REP, INT, and LOOP instructions for proceed
+ * breakpoint
+ */
+
+ if ((strncmp(ubuf, "CALL", 4) == 0) || (strncmp(ubuf, "REP", 3) == 0) ||
+ (strncmp(ubuf, "INT", 3) == 0) || (strncmp(ubuf, "LOOP", 4) == 0))
+ {
+ needs_proceed = 1;
+ jmp_active = 1;
+ }
+
+ if ((strncmp(ubuf, "IRET", 4) == 0) || (strncmp(ubuf, "RET", 3) == 0))
+ jmp_active = 1;
+
+ return (unsigned long) 0;
+
+}
+
+int mdb_unasm_length(void *ip, int use)
+{
+ unsigned char *oldVAddress;
+ unsigned char *v = (unsigned char *) ip;
+
+ if (use)
+ SegmentSize = 32;
+ else
+ SegmentSize = 16;
+
+ DefaultPickSign = 0;
+ needs_proceed = 0;
+ jmp_active = 0;
+ nestLevel = 0;
+ pSize = 4;
+
+ Prefix = 0;
+ modrmv = sibv = -1;
+ OperandSize = AddressSize = SegmentSize;
+ oldVAddress = VirtualAddress = (void *)v;
+ bufp = bufe = 0;
+ Columns = 0;
+ ubufp = ubuf;
+ ProcessInstruction(NULL, opmap1[getbyte()]);
+
+ return (int)((unsigned long)VirtualAddress - (unsigned long)oldVAddress);
+
+}
--
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