Bug Summary

File:arch/amd64/amd64/db_disasm.c
Warning:line 965, column 2
1st function call argument is an uninitialized value

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name db_disasm.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model static -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -ffreestanding -mcmodel=kernel -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -target-feature -sse2 -target-feature -sse -target-feature -3dnow -target-feature -mmx -target-feature +save-args -disable-red-zone -no-implicit-float -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -nostdsysteminc -nobuiltininc -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/sys -I /usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -I /usr/src/sys/arch -I /usr/src/sys/dev/pci/drm/include -I /usr/src/sys/dev/pci/drm/include/uapi -I /usr/src/sys/dev/pci/drm/amd/include/asic_reg -I /usr/src/sys/dev/pci/drm/amd/include -I /usr/src/sys/dev/pci/drm/amd/amdgpu -I /usr/src/sys/dev/pci/drm/amd/display -I /usr/src/sys/dev/pci/drm/amd/display/include -I /usr/src/sys/dev/pci/drm/amd/display/dc -I /usr/src/sys/dev/pci/drm/amd/display/amdgpu_dm -I /usr/src/sys/dev/pci/drm/amd/pm/inc -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu11 -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu12 -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/hwmgr -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/smumgr -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc/hw -I /usr/src/sys/dev/pci/drm/amd/display/dc/clk_mgr -I /usr/src/sys/dev/pci/drm/amd/display/modules/inc -I /usr/src/sys/dev/pci/drm/amd/display/modules/hdcp -I /usr/src/sys/dev/pci/drm/amd/display/dmub/inc -I /usr/src/sys/dev/pci/drm/i915 -D DDB -D DIAGNOSTIC -D KTRACE -D ACCOUNTING -D KMEMSTATS -D PTRACE -D POOL_DEBUG -D CRYPTO -D SYSVMSG -D SYSVSEM -D SYSVSHM -D UVM_SWAP_ENCRYPT -D FFS -D FFS2 -D FFS_SOFTUPDATES -D UFS_DIRHASH -D QUOTA -D EXT2FS -D MFS -D NFSCLIENT -D NFSSERVER -D CD9660 -D UDF -D MSDOSFS -D FIFO -D FUSE -D SOCKET_SPLICE -D TCP_ECN -D TCP_SIGNATURE -D INET6 -D IPSEC -D PPP_BSDCOMP -D PPP_DEFLATE -D PIPEX -D MROUTING -D MPLS -D BOOT_CONFIG -D USER_PCICONF -D APERTURE -D MTRR -D NTFS -D HIBERNATE -D PCIVERBOSE -D USBVERBOSE -D WSDISPLAY_COMPAT_USL -D WSDISPLAY_COMPAT_RAWKBD -D WSDISPLAY_DEFAULTSCREENS=6 -D X86EMU -D ONEWIREVERBOSE -D MULTIPROCESSOR -D MAXUSERS=80 -D _KERNEL -D CONFIG_DRM_AMD_DC_DCN3_0 -O2 -Wno-pointer-sign -Wno-address-of-packed-member -Wno-constant-conversion -Wno-unused-but-set-variable -Wno-gnu-folding-constant -fdebug-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -o /usr/obj/sys/arch/amd64/compile/GENERIC.MP/scan-build/2022-01-12-131800-47421-1 -x c /usr/src/sys/arch/amd64/amd64/db_disasm.c
1/* $OpenBSD: db_disasm.c,v 1.22 2020/09/11 09:27:09 mpi Exp $ */
2/* $NetBSD: db_disasm.c,v 1.11 1996/05/03 19:41:58 christos Exp $ */
3
4/*
5 * Mach Operating System
6 * Copyright (c) 1991,1990 Carnegie Mellon University
7 * All Rights Reserved.
8 *
9 * Permission to use, copy, modify and distribute this software and its
10 * documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
17 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22 * School of Computer Science
23 * Carnegie Mellon University
24 * Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie Mellon
27 * the rights to redistribute these changes.
28 *
29 * Id: db_disasm.c,v 2.6 92/01/03 20:05:00 dbg (CMU)
30 */
31
32/*
33 * Instruction disassembler.
34 */
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <machine/db_machdep.h>
38
39#include <ddb/db_access.h>
40#include <ddb/db_sym.h>
41#include <ddb/db_output.h>
42
43/*
44 * Size attributes
45 */
46#define BYTE0 0
47#define WORD1 1
48#define LONG2 2
49#define QUAD3 3
50#define SNGL4 4
51#define DBLR5 5
52#define EXTR6 6
53#define SDEP7 7
54#define NONE8 8
55#define RDEP9 9
56
57/*
58 * Addressing modes
59 */
60#define E1 1 /* general effective address */
61#define Eind2 2 /* indirect address (jump, call) */
62#define Ew3 3 /* address, word size */
63#define Eb4 4 /* address, byte size */
64#define R5 5 /* register, in 'reg' field */
65#define Rw6 6 /* word register, in 'reg' field */
66#define Ri7 7 /* register in instruction */
67#define S8 8 /* segment reg, in 'reg' field */
68#define Si9 9 /* segment reg, in instruction */
69#define A10 10 /* accumulator */
70#define BX11 11 /* (bx) */
71#define CL12 12 /* cl, for shifts */
72#define DX13 13 /* dx, for IO */
73#define SI14 14 /* si */
74#define DI15 15 /* di */
75#define CR16 16 /* control register */
76#define DR17 17 /* debug register */
77#define TR18 18 /* test register */
78#define I19 19 /* immediate, unsigned */
79#define Is20 20 /* immediate, signed */
80#define Ib21 21 /* byte immediate, unsigned */
81#define Ibs22 22 /* byte immediate, signed */
82#define Iw23 23 /* word immediate, unsigned */
83#define Iq24 24 /* quad immediate, unsigned */
84#define O25 25 /* direct address */
85#define Db26 26 /* byte displacement from EIP */
86#define Dl27 27 /* long displacement from EIP */
87#define o128 28 /* constant 1 */
88#define o329 29 /* constant 3 */
89#define OS30 30 /* immediate offset/segment */
90#define ST31 31 /* FP stack top */
91#define STI32 32 /* FP stack */
92#define X33 33 /* extended FP op */
93#define XA34 34 /* for 'fstcw %ax' */
94#define Ril36 36 /* long register in instruction */
95#define Iba37 37 /* byte immediate, don't print if 0xa */
96#define MEx38 38 /* memory, or an extension op */
97
98struct inst {
99 char * i_name; /* name */
100 short i_has_modrm; /* has regmodrm byte */
101 short i_size; /* operand size */
102 int i_mode; /* addressing modes */
103 void * i_extra; /* pointer to extra opcode table */
104};
105
106#define op1(x)(x) (x)
107#define op2(x,y)((x)|((y)<<8)) ((x)|((y)<<8))
108#define op3(x,y,z)((x)|((y)<<8)|((z)<<16)) ((x)|((y)<<8)|((z)<<16))
109
110struct finst {
111 char * f_name; /* name for memory instruction */
112 int f_size; /* size for memory instruction */
113 int f_rrmode; /* mode for rr instruction */
114 void * f_rrname; /* name for rr instruction
115 (or pointer to table) */
116};
117
118char * db_Grp6[] = {
119 "sldt", "str", "lldt", "ltr",
120 "verr", "verw", "", ""
121};
122
123struct inst db_Grp7[] = {
124 { "sgdt", 0, NONE8, op2(MEx,5)((38)|((5)<<8)), "\0vmcall\0vmlaunch\0vmresume\0vmxoff"},
125 { "sidt", 0, NONE8, op2(MEx,4)((38)|((4)<<8)), "monitor\0mwait\0clac\0stac"},
126 { "lgdt", 0, NONE8, op2(MEx,7)((38)|((7)<<8)), "xgetbv\0xsetbv\0\0\0vmfunc\0xend\0xtest" },
127 { "lidt", 0, NONE8, op1(E)(1), 0 },
128 { "smsw", 0, NONE8, op1(E)(1), 0 },
129 { "", 0, NONE8, 0, 0 },
130 { "lmsw", 0, NONE8, op1(E)(1), 0 },
131 { "invlpg", 0, NONE8, op2(MEx,2)((38)|((2)<<8)), "swapgs\0rdtscp" },
132};
133
134char * db_Grp8[] = {
135 "", "", "", "",
136 "bt", "bts", "btr", "btc"
137};
138
139struct inst db_Grp9[] = {
140 { "fxsave", 0, NONE8, op2(MEx,1)((38)|((1)<<8)), "rdfsbase" },
141 { "fxrstor", 0, NONE8, op2(MEx,1)((38)|((1)<<8)), "rdgsbase" },
142 { "ldmxcsr", 0, NONE8, op2(MEx,1)((38)|((1)<<8)), "wrfsbase" },
143 { "stmxcsr", 0, NONE8, op2(MEx,1)((38)|((1)<<8)), "wrgsbase" },
144 { "xsave", 0, NONE8, op1(E)(1), 0 },
145 { "xrstor", 0, NONE8, op2(MEx,1)((38)|((1)<<8)), "lfence" },
146 { "xsaveopt", 0, NONE8, op2(MEx,1)((38)|((1)<<8)), "mfence" },
147 { "clflush", 0, NONE8, op2(MEx,1)((38)|((1)<<8)), "sfence" },
148};
149
150char * db_GrpA[] = {
151 "", "cmpxchg8b", "", "",
152 "", "", "rdrand", "rdseed"
153};
154
155char * db_GrpB[] = {
156 "xstore-rng", "xcrypt-ecb", "xcrypt-cbc", "xcrypt-ctr",
157 "xcrypt-cfb", "xcrypt-ofb", "", ""
158};
159
160char * db_GrpC[] = {
161 "montmul", "xsha1", "xsha256", "",
162 "", "", "", ""
163};
164
165struct inst db_inst_0f0x[] = {
166/*00*/ { NULL((void *)0), 1, NONE8, op1(Ew)(3), db_Grp6 },
167/*01*/ { "", 1, RDEP9, 0, db_Grp7 },
168/*02*/ { "lar", 1, LONG2, op2(E,R)((1)|((5)<<8)), 0 },
169/*03*/ { "lsl", 1, LONG2, op2(E,R)((1)|((5)<<8)), 0 },
170/*04*/ { "", 0, NONE8, 0, 0 },
171/*05*/ { "", 0, NONE8, 0, 0 },
172/*06*/ { "clts", 0, NONE8, 0, 0 },
173/*07*/ { "", 0, NONE8, 0, 0 },
174
175/*08*/ { "invd", 0, NONE8, 0, 0 },
176/*09*/ { "wbinvd",0, NONE8, 0, 0 },
177/*0a*/ { "", 0, NONE8, 0, 0 },
178/*0b*/ { "", 0, NONE8, 0, 0 },
179/*0c*/ { "", 0, NONE8, 0, 0 },
180/*0d*/ { "", 0, NONE8, 0, 0 },
181/*0e*/ { "", 0, NONE8, 0, 0 },
182/*0f*/ { "", 0, NONE8, 0, 0 },
183};
184
185struct inst db_inst_0f2x[] = {
186/*20*/ { "mov", 1, LONG2, op2(CR,E)((16)|((1)<<8)), 0 }, /* use E for reg */
187/*21*/ { "mov", 1, LONG2, op2(DR,E)((17)|((1)<<8)), 0 }, /* since mod == 11 */
188/*22*/ { "mov", 1, LONG2, op2(E,CR)((1)|((16)<<8)), 0 },
189/*23*/ { "mov", 1, LONG2, op2(E,DR)((1)|((17)<<8)), 0 },
190/*24*/ { "mov", 1, LONG2, op2(TR,E)((18)|((1)<<8)), 0 },
191/*25*/ { "", 0, NONE8, 0, 0 },
192/*26*/ { "mov", 1, LONG2, op2(E,TR)((1)|((18)<<8)), 0 },
193/*27*/ { "", 0, NONE8, 0, 0 },
194
195/*28*/ { "", 0, NONE8, 0, 0 },
196/*29*/ { "", 0, NONE8, 0, 0 },
197/*2a*/ { "", 0, NONE8, 0, 0 },
198/*2b*/ { "", 0, NONE8, 0, 0 },
199/*2c*/ { "", 0, NONE8, 0, 0 },
200/*2d*/ { "", 0, NONE8, 0, 0 },
201/*2e*/ { "", 0, NONE8, 0, 0 },
202/*2f*/ { "", 0, NONE8, 0, 0 },
203};
204
205struct inst db_inst_0f3x[] = {
206/*30*/ { "wrmsr", 0, NONE8, 0, 0 },
207/*31*/ { "rdtsc", 0, NONE8, 0, 0 },
208/*32*/ { "rdmsr", 0, NONE8, 0, 0 },
209/*33*/ { "rdpmc", 0, NONE8, 0, 0 },
210/*34*/ { "", 0, NONE8, 0, 0 },
211/*35*/ { "", 0, NONE8, 0, 0 },
212/*36*/ { "", 0, NONE8, 0, 0 },
213/*37*/ { "", 0, NONE8, 0, 0 },
214
215/*38*/ { "", 0, NONE8, 0, 0 },
216/*39*/ { "", 0, NONE8, 0, 0 },
217/*3a*/ { "", 0, NONE8, 0, 0 },
218/*3b*/ { "", 0, NONE8, 0, 0 },
219/*3c*/ { "", 0, NONE8, 0, 0 },
220/*3d*/ { "", 0, NONE8, 0, 0 },
221/*3e*/ { "", 0, NONE8, 0, 0 },
222/*3f*/ { "", 0, NONE8, 0, 0 },
223};
224
225struct inst db_inst_0f8x[] = {
226/*80*/ { "jo", 0, NONE8, op1(Dl)(27), 0 },
227/*81*/ { "jno", 0, NONE8, op1(Dl)(27), 0 },
228/*82*/ { "jb", 0, NONE8, op1(Dl)(27), 0 },
229/*83*/ { "jnb", 0, NONE8, op1(Dl)(27), 0 },
230/*84*/ { "jz", 0, NONE8, op1(Dl)(27), 0 },
231/*85*/ { "jnz", 0, NONE8, op1(Dl)(27), 0 },
232/*86*/ { "jbe", 0, NONE8, op1(Dl)(27), 0 },
233/*87*/ { "jnbe", 0, NONE8, op1(Dl)(27), 0 },
234
235/*88*/ { "js", 0, NONE8, op1(Dl)(27), 0 },
236/*89*/ { "jns", 0, NONE8, op1(Dl)(27), 0 },
237/*8a*/ { "jp", 0, NONE8, op1(Dl)(27), 0 },
238/*8b*/ { "jnp", 0, NONE8, op1(Dl)(27), 0 },
239/*8c*/ { "jl", 0, NONE8, op1(Dl)(27), 0 },
240/*8d*/ { "jnl", 0, NONE8, op1(Dl)(27), 0 },
241/*8e*/ { "jle", 0, NONE8, op1(Dl)(27), 0 },
242/*8f*/ { "jnle", 0, NONE8, op1(Dl)(27), 0 },
243};
244
245struct inst db_inst_0f9x[] = {
246/*90*/ { "seto", 1, NONE8, op1(Eb)(4), 0 },
247/*91*/ { "setno", 1, NONE8, op1(Eb)(4), 0 },
248/*92*/ { "setb", 1, NONE8, op1(Eb)(4), 0 },
249/*93*/ { "setnb", 1, NONE8, op1(Eb)(4), 0 },
250/*94*/ { "setz", 1, NONE8, op1(Eb)(4), 0 },
251/*95*/ { "setnz", 1, NONE8, op1(Eb)(4), 0 },
252/*96*/ { "setbe", 1, NONE8, op1(Eb)(4), 0 },
253/*97*/ { "setnbe",1, NONE8, op1(Eb)(4), 0 },
254
255/*98*/ { "sets", 1, NONE8, op1(Eb)(4), 0 },
256/*99*/ { "setns", 1, NONE8, op1(Eb)(4), 0 },
257/*9a*/ { "setp", 1, NONE8, op1(Eb)(4), 0 },
258/*9b*/ { "setnp", 1, NONE8, op1(Eb)(4), 0 },
259/*9c*/ { "setl", 1, NONE8, op1(Eb)(4), 0 },
260/*9d*/ { "setnl", 1, NONE8, op1(Eb)(4), 0 },
261/*9e*/ { "setle", 1, NONE8, op1(Eb)(4), 0 },
262/*9f*/ { "setnle",1, NONE8, op1(Eb)(4), 0 },
263};
264
265struct inst db_inst_0fax[] = {
266/*a0*/ { "push", 0, QUAD3, op1(Si)(9), 0 },
267/*a1*/ { "pop", 0, QUAD3, op1(Si)(9), 0 },
268/*a2*/ { "cpuid", 0, NONE8, 0, 0 },
269/*a3*/ { "bt", 1, LONG2, op2(R,E)((5)|((1)<<8)), 0 },
270/*a4*/ { "shld", 1, LONG2, op3(Ib,R,E)((21)|((5)<<8)|((1)<<16)), 0 },
271/*a5*/ { "shld", 1, LONG2, op3(CL,R,E)((12)|((5)<<8)|((1)<<16)), 0 },
272/*a6*/ { NULL((void *)0), 1, NONE8, 0, db_GrpC },
273/*a7*/ { NULL((void *)0), 1, NONE8, 0, db_GrpB },
274
275/*a8*/ { "push", 0, QUAD3, op1(Si)(9), 0 },
276/*a9*/ { "pop", 0, QUAD3, op1(Si)(9), 0 },
277/*aa*/ { "", 0, NONE8, 0, 0 },
278/*ab*/ { "bts", 1, LONG2, op2(R,E)((5)|((1)<<8)), 0 },
279/*ac*/ { "shrd", 1, LONG2, op3(Ib,E,R)((21)|((1)<<8)|((5)<<16)), 0 },
280/*ad*/ { "shrd", 1, LONG2, op3(CL,E,R)((12)|((1)<<8)|((5)<<16)), 0 },
281/*ae*/ { "", 1, RDEP9, op1(E)(1), db_Grp9 },
282/*af*/ { "imul", 1, LONG2, op2(E,R)((1)|((5)<<8)), 0 },
283};
284
285struct inst db_inst_0fbx[] = {
286/*b0*/ { "cmpxchg",1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
287/*b1*/ { "cmpxchg",1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
288/*b2*/ { "lss", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
289/*b3*/ { "btr", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
290/*b4*/ { "lfs", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
291/*b5*/ { "lgs", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
292/*b6*/ { "movzb", 1, LONG2, op2(Eb, R)((4)|((5)<<8)), 0 },
293/*b7*/ { "movzw", 1, LONG2, op2(Ew, R)((3)|((5)<<8)), 0 },
294
295/*b8*/ { "", 0, NONE8, 0, 0 },
296/*b9*/ { "", 0, NONE8, 0, 0 },
297/*ba*/ { NULL((void *)0), 1, LONG2, op2(Ib, E)((21)|((1)<<8)), db_Grp8 },
298/*bb*/ { "btc", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
299/*bc*/ { "bsf", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
300/*bd*/ { "bsr", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
301/*be*/ { "movsb", 1, LONG2, op2(Eb, R)((4)|((5)<<8)), 0 },
302/*bf*/ { "movsw", 1, LONG2, op2(Ew, R)((3)|((5)<<8)), 0 },
303};
304
305struct inst db_inst_0fcx[] = {
306/*c0*/ { "xadd", 1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
307/*c1*/ { "xadd", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
308/*c2*/ { "", 0, NONE8, 0, 0 },
309/*c3*/ { "", 0, NONE8, 0, 0 },
310/*c4*/ { "", 0, NONE8, 0, 0 },
311/*c5*/ { "", 0, NONE8, 0, 0 },
312/*c6*/ { "", 0, NONE8, 0, 0 },
313/*c7*/ { NULL((void *)0), 1, NONE8, op1(E)(1), db_GrpA },
314
315/*c8*/ { "bswap", 0, LONG2, op1(Ril)(36), 0 },
316/*c9*/ { "bswap", 0, LONG2, op1(Ril)(36), 0 },
317/*ca*/ { "bswap", 0, LONG2, op1(Ril)(36), 0 },
318/*cb*/ { "bswap", 0, LONG2, op1(Ril)(36), 0 },
319/*cc*/ { "bswap", 0, LONG2, op1(Ril)(36), 0 },
320/*cd*/ { "bswap", 0, LONG2, op1(Ril)(36), 0 },
321/*ce*/ { "bswap", 0, LONG2, op1(Ril)(36), 0 },
322/*cf*/ { "bswap", 0, LONG2, op1(Ril)(36), 0 },
323};
324
325struct inst *db_inst_0f[] = {
326 db_inst_0f0x,
327 NULL((void *)0),
328 db_inst_0f2x,
329 db_inst_0f3x,
330 NULL((void *)0),
331 NULL((void *)0),
332 NULL((void *)0),
333 NULL((void *)0),
334 db_inst_0f8x,
335 db_inst_0f9x,
336 db_inst_0fax,
337 db_inst_0fbx,
338 db_inst_0fcx,
339 NULL((void *)0),
340 NULL((void *)0),
341 NULL((void *)0)
342};
343
344char * db_Esc92[] = {
345 "fnop", "", "", "",
346 "", "", "", ""
347};
348char * db_Esc94[] = {
349 "fchs", "fabs", "", "",
350 "ftst", "fxam", "", ""
351};
352char * db_Esc95[] = {
353 "fld1", "fldl2t", "fldl2e", "fldpi",
354 "fldlg2", "fldln2", "fldz", ""
355};
356char * db_Esc96[] = {
357 "f2xm1", "fyl2x", "fptan", "fpatan",
358 "fxtract", "fprem1", "fdecstp", "fincstp"
359};
360char * db_Esc97[] = {
361 "fprem", "fyl2xp1", "fsqrt", "fsincos",
362 "frndint", "fscale", "fsin", "fcos"
363};
364
365char * db_Esca5[] = {
366 "", "fucompp", "", "",
367 "", "", "", ""
368};
369
370char * db_Escb4[] = {
371 "fneni", "fndisi", "fnclex", "fninit",
372 "fsetpm", "", "", ""
373};
374
375char * db_Esce3[] = {
376 "", "fcompp", "", "",
377 "", "", "", ""
378};
379
380char * db_Escf4[] = {
381 "fnstsw", "", "", "",
382 "", "", "", ""
383};
384
385struct finst db_Esc8[] = {
386/*0*/ { "fadd", SNGL4, op2(STI,ST)((32)|((31)<<8)), 0 },
387/*1*/ { "fmul", SNGL4, op2(STI,ST)((32)|((31)<<8)), 0 },
388/*2*/ { "fcom", SNGL4, op2(STI,ST)((32)|((31)<<8)), 0 },
389/*3*/ { "fcomp", SNGL4, op2(STI,ST)((32)|((31)<<8)), 0 },
390/*4*/ { "fsub", SNGL4, op2(STI,ST)((32)|((31)<<8)), 0 },
391/*5*/ { "fsubr", SNGL4, op2(STI,ST)((32)|((31)<<8)), 0 },
392/*6*/ { "fdiv", SNGL4, op2(STI,ST)((32)|((31)<<8)), 0 },
393/*7*/ { "fdivr", SNGL4, op2(STI,ST)((32)|((31)<<8)), 0 },
394};
395
396struct finst db_Esc9[] = {
397/*0*/ { "fld", SNGL4, op1(STI)(32), 0 },
398/*1*/ { "", NONE8, op1(STI)(32), "fxch" },
399/*2*/ { "fst", SNGL4, op1(X)(33), db_Esc92 },
400/*3*/ { "fstp", SNGL4, op1(X)(33), 0 },
401/*4*/ { "fldenv", NONE8, op1(X)(33), db_Esc94 },
402/*5*/ { "fldcw", NONE8, op1(X)(33), db_Esc95 },
403/*6*/ { "fnstenv",NONE8, op1(X)(33), db_Esc96 },
404/*7*/ { "fnstcw", NONE8, op1(X)(33), db_Esc97 },
405};
406
407struct finst db_Esca[] = {
408/*0*/ { "fiadd", LONG2, 0, 0 },
409/*1*/ { "fimul", LONG2, 0, 0 },
410/*2*/ { "ficom", LONG2, 0, 0 },
411/*3*/ { "ficomp", LONG2, 0, 0 },
412/*4*/ { "fisub", LONG2, op1(X)(33), 0 },
413/*5*/ { "fisubr", LONG2, 0, 0 },
414/*6*/ { "fidiv", LONG2, 0, 0 },
415/*7*/ { "fidivr", LONG2, 0, 0 }
416};
417
418struct finst db_Escb[] = {
419/*0*/ { "fild", LONG2, 0, 0 },
420/*1*/ { "", NONE8, 0, 0 },
421/*2*/ { "fist", LONG2, 0, 0 },
422/*3*/ { "fistp", LONG2, 0, 0 },
423/*4*/ { "", WORD1, op1(X)(33), db_Escb4 },
424/*5*/ { "fld", EXTR6, 0, 0 },
425/*6*/ { "", WORD1, 0, 0 },
426/*7*/ { "fstp", EXTR6, 0, 0 },
427};
428
429struct finst db_Escc[] = {
430/*0*/ { "fadd", DBLR5, op2(ST,STI)((31)|((32)<<8)), 0 },
431/*1*/ { "fmul", DBLR5, op2(ST,STI)((31)|((32)<<8)), 0 },
432/*2*/ { "fcom", DBLR5, 0, 0 },
433/*3*/ { "fcomp", DBLR5, 0, 0 },
434/*4*/ { "fsub", DBLR5, op2(ST,STI)((31)|((32)<<8)), "fsubr" },
435/*5*/ { "fsubr", DBLR5, op2(ST,STI)((31)|((32)<<8)), "fsub" },
436/*6*/ { "fdiv", DBLR5, op2(ST,STI)((31)|((32)<<8)), "fdivr" },
437/*7*/ { "fdivr", DBLR5, op2(ST,STI)((31)|((32)<<8)), "fdiv" },
438};
439
440struct finst db_Escd[] = {
441/*0*/ { "fld", DBLR5, op1(STI)(32), "ffree" },
442/*1*/ { "", NONE8, 0, 0 },
443/*2*/ { "fst", DBLR5, op1(STI)(32), 0 },
444/*3*/ { "fstp", DBLR5, op1(STI)(32), 0 },
445/*4*/ { "frstor", NONE8, op1(STI)(32), "fucom" },
446/*5*/ { "", NONE8, op1(STI)(32), "fucomp" },
447/*6*/ { "fnsave", NONE8, 0, 0 },
448/*7*/ { "fnstsw", NONE8, 0, 0 },
449};
450
451struct finst db_Esce[] = {
452/*0*/ { "fiadd", WORD1, op2(ST,STI)((31)|((32)<<8)), "faddp" },
453/*1*/ { "fimul", WORD1, op2(ST,STI)((31)|((32)<<8)), "fmulp" },
454/*2*/ { "ficom", WORD1, 0, 0 },
455/*3*/ { "ficomp", WORD1, op1(X)(33), db_Esce3 },
456/*4*/ { "fisub", WORD1, op2(ST,STI)((31)|((32)<<8)), "fsubrp" },
457/*5*/ { "fisubr", WORD1, op2(ST,STI)((31)|((32)<<8)), "fsubp" },
458/*6*/ { "fidiv", WORD1, op2(ST,STI)((31)|((32)<<8)), "fdivrp" },
459/*7*/ { "fidivr", WORD1, op2(ST,STI)((31)|((32)<<8)), "fdivp" },
460};
461
462struct finst db_Escf[] = {
463/*0*/ { "fild", WORD1, 0, 0 },
464/*1*/ { "", WORD1, 0, 0 },
465/*2*/ { "fist", WORD1, 0, 0 },
466/*3*/ { "fistp", WORD1, 0, 0 },
467/*4*/ { "fbld", NONE8, op1(XA)(34), db_Escf4 },
468/*5*/ { "fild", QUAD3, 0, 0 },
469/*6*/ { "fbstp", NONE8, 0, 0 },
470/*7*/ { "fistp", QUAD3, 0, 0 },
471};
472
473struct finst *db_Esc_inst[] = {
474 db_Esc8, db_Esc9, db_Esca, db_Escb,
475 db_Escc, db_Escd, db_Esce, db_Escf
476};
477
478char * db_Grp1[] = {
479 "add",
480 "or",
481 "adc",
482 "sbb",
483 "and",
484 "sub",
485 "xor",
486 "cmp"
487};
488
489char * db_Grp2[] = {
490 "rol",
491 "ror",
492 "rcl",
493 "rcr",
494 "shl",
495 "shr",
496 "shl",
497 "sar"
498};
499
500struct inst db_Grp3[] = {
501 { "test", 1, NONE8, op2(I,E)((19)|((1)<<8)), 0 },
502 { "test", 1, NONE8, op2(I,E)((19)|((1)<<8)), 0 },
503 { "not", 1, NONE8, op1(E)(1), 0 },
504 { "neg", 1, NONE8, op1(E)(1), 0 },
505 { "mul", 1, NONE8, op2(E,A)((1)|((10)<<8)), 0 },
506 { "imul", 1, NONE8, op2(E,A)((1)|((10)<<8)), 0 },
507 { "div", 1, NONE8, op2(E,A)((1)|((10)<<8)), 0 },
508 { "idiv", 1, NONE8, op2(E,A)((1)|((10)<<8)), 0 },
509};
510
511struct inst db_Grp4[] = {
512 { "inc", 1, BYTE0, op1(E)(1), 0 },
513 { "dec", 1, BYTE0, op1(E)(1), 0 },
514 { "", 1, NONE8, 0, 0 },
515 { "", 1, NONE8, 0, 0 },
516 { "", 1, NONE8, 0, 0 },
517 { "", 1, NONE8, 0, 0 },
518 { "", 1, NONE8, 0, 0 },
519 { "", 1, NONE8, 0, 0 }
520};
521
522struct inst db_Grp5[] = {
523 { "inc", 1, LONG2, op1(E)(1), 0 },
524 { "dec", 1, LONG2, op1(E)(1), 0 },
525 { "call", 1, QUAD3, op1(Eind)(2),0 },
526 { "lcall", 1, NONE8, op1(Eind)(2),0 },
527 { "jmp", 1, NONE8, op1(Eind)(2),0 },
528 { "ljmp", 1, NONE8, op1(Eind)(2),0 },
529 { "push", 1, QUAD3, op1(E)(1), 0 },
530 { "", 1, NONE8, 0, 0 }
531};
532
533struct inst db_inst_table[256] = {
534/*00*/ { "add", 1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
535/*01*/ { "add", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
536/*02*/ { "add", 1, BYTE0, op2(E, R)((1)|((5)<<8)), 0 },
537/*03*/ { "add", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
538/*04*/ { "add", 0, BYTE0, op2(I, A)((19)|((10)<<8)), 0 },
539/*05*/ { "add", 0, LONG2, op2(Is, A)((20)|((10)<<8)), 0 },
540/*06*/ { "", 0, NONE8, op1(Si)(9), 0 },
541/*07*/ { "", 0, NONE8, op1(Si)(9), 0 },
542
543/*08*/ { "or", 1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
544/*09*/ { "or", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
545/*0a*/ { "or", 1, BYTE0, op2(E, R)((1)|((5)<<8)), 0 },
546/*0b*/ { "or", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
547/*0c*/ { "or", 0, BYTE0, op2(I, A)((19)|((10)<<8)), 0 },
548/*0d*/ { "or", 0, LONG2, op2(I, A)((19)|((10)<<8)), 0 },
549/*0e*/ { "", 0, NONE8, op1(Si)(9), 0 },
550/*0f*/ { "", 0, NONE8, 0, 0 },
551
552/*10*/ { "adc", 1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
553/*11*/ { "adc", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
554/*12*/ { "adc", 1, BYTE0, op2(E, R)((1)|((5)<<8)), 0 },
555/*13*/ { "adc", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
556/*14*/ { "adc", 0, BYTE0, op2(I, A)((19)|((10)<<8)), 0 },
557/*15*/ { "adc", 0, LONG2, op2(Is, A)((20)|((10)<<8)), 0 },
558/*16*/ { "", 0, NONE8, op1(Si)(9), 0 },
559/*17*/ { "", 0, NONE8, op1(Si)(9), 0 },
560
561/*18*/ { "sbb", 1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
562/*19*/ { "sbb", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
563/*1a*/ { "sbb", 1, BYTE0, op2(E, R)((1)|((5)<<8)), 0 },
564/*1b*/ { "sbb", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
565/*1c*/ { "sbb", 0, BYTE0, op2(I, A)((19)|((10)<<8)), 0 },
566/*1d*/ { "sbb", 0, LONG2, op2(Is, A)((20)|((10)<<8)), 0 },
567/*1e*/ { "", 0, NONE8, op1(Si)(9), 0 },
568/*1f*/ { "", 0, NONE8, op1(Si)(9), 0 },
569
570/*20*/ { "and", 1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
571/*21*/ { "and", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
572/*22*/ { "and", 1, BYTE0, op2(E, R)((1)|((5)<<8)), 0 },
573/*23*/ { "and", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
574/*24*/ { "and", 0, BYTE0, op2(I, A)((19)|((10)<<8)), 0 },
575/*25*/ { "and", 0, LONG2, op2(I, A)((19)|((10)<<8)), 0 },
576/*26*/ { "", 0, NONE8, 0, 0 },
577/*27*/ { "", 0, NONE8, 0, 0 },
578
579/*28*/ { "sub", 1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
580/*29*/ { "sub", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
581/*2a*/ { "sub", 1, BYTE0, op2(E, R)((1)|((5)<<8)), 0 },
582/*2b*/ { "sub", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
583/*2c*/ { "sub", 0, BYTE0, op2(I, A)((19)|((10)<<8)), 0 },
584/*2d*/ { "sub", 0, LONG2, op2(Is, A)((20)|((10)<<8)), 0 },
585/*2e*/ { "", 0, NONE8, 0, 0 },
586/*2f*/ { "", 0, NONE8, 0, 0 },
587
588/*30*/ { "xor", 1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
589/*31*/ { "xor", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
590/*32*/ { "xor", 1, BYTE0, op2(E, R)((1)|((5)<<8)), 0 },
591/*33*/ { "xor", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
592/*34*/ { "xor", 0, BYTE0, op2(I, A)((19)|((10)<<8)), 0 },
593/*35*/ { "xor", 0, LONG2, op2(I, A)((19)|((10)<<8)), 0 },
594/*36*/ { "", 0, NONE8, 0, 0 },
595/*37*/ { "", 0, NONE8, 0, 0 },
596
597/*38*/ { "cmp", 1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
598/*39*/ { "cmp", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
599/*3a*/ { "cmp", 1, BYTE0, op2(E, R)((1)|((5)<<8)), 0 },
600/*3b*/ { "cmp", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
601/*3c*/ { "cmp", 0, BYTE0, op2(I, A)((19)|((10)<<8)), 0 },
602/*3d*/ { "cmp", 0, LONG2, op2(Is, A)((20)|((10)<<8)), 0 },
603/*3e*/ { "", 0, NONE8, 0, 0 },
604/*3f*/ { "", 0, NONE8, 0, 0 },
605
606/*40*/ { "", 0, LONG2, op1(Ri)(7), 0 },
607/*41*/ { "", 0, LONG2, op1(Ri)(7), 0 },
608/*42*/ { "", 0, LONG2, op1(Ri)(7), 0 },
609/*43*/ { "", 0, LONG2, op1(Ri)(7), 0 },
610/*44*/ { "", 0, LONG2, op1(Ri)(7), 0 },
611/*45*/ { "", 0, LONG2, op1(Ri)(7), 0 },
612/*46*/ { "", 0, LONG2, op1(Ri)(7), 0 },
613/*47*/ { "", 0, LONG2, op1(Ri)(7), 0 },
614
615/*48*/ { "", 0, LONG2, op1(Ri)(7), 0 },
616/*49*/ { "", 0, LONG2, op1(Ri)(7), 0 },
617/*4a*/ { "", 0, LONG2, op1(Ri)(7), 0 },
618/*4b*/ { "", 0, LONG2, op1(Ri)(7), 0 },
619/*4c*/ { "", 0, LONG2, op1(Ri)(7), 0 },
620/*4d*/ { "", 0, LONG2, op1(Ri)(7), 0 },
621/*4e*/ { "", 0, LONG2, op1(Ri)(7), 0 },
622/*4f*/ { "", 0, LONG2, op1(Ri)(7), 0 },
623
624/*50*/ { "push", 0, QUAD3, op1(Ri)(7), 0 },
625/*51*/ { "push", 0, QUAD3, op1(Ri)(7), 0 },
626/*52*/ { "push", 0, QUAD3, op1(Ri)(7), 0 },
627/*53*/ { "push", 0, QUAD3, op1(Ri)(7), 0 },
628/*54*/ { "push", 0, QUAD3, op1(Ri)(7), 0 },
629/*55*/ { "push", 0, QUAD3, op1(Ri)(7), 0 },
630/*56*/ { "push", 0, QUAD3, op1(Ri)(7), 0 },
631/*57*/ { "push", 0, QUAD3, op1(Ri)(7), 0 },
632
633/*58*/ { "pop", 0, QUAD3, op1(Ri)(7), 0 },
634/*59*/ { "pop", 0, QUAD3, op1(Ri)(7), 0 },
635/*5a*/ { "pop", 0, QUAD3, op1(Ri)(7), 0 },
636/*5b*/ { "pop", 0, QUAD3, op1(Ri)(7), 0 },
637/*5c*/ { "pop", 0, QUAD3, op1(Ri)(7), 0 },
638/*5d*/ { "pop", 0, QUAD3, op1(Ri)(7), 0 },
639/*5e*/ { "pop", 0, QUAD3, op1(Ri)(7), 0 },
640/*5f*/ { "pop", 0, QUAD3, op1(Ri)(7), 0 },
641
642/*60*/ { "", 0, LONG2, 0, 0 },
643/*61*/ { "", 0, LONG2, 0, 0 },
644/*62*/ { "", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
645/*63*/ { "movsxd",1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
646/*64*/ { "", 0, NONE8, 0, 0 },
647/*65*/ { "", 0, NONE8, 0, 0 },
648/*66*/ { "", 0, NONE8, 0, 0 },
649/*67*/ { "", 0, NONE8, 0, 0 },
650
651/*68*/ { "push", 0, QUAD3, op1(I)(19), 0 },
652/*69*/ { "imul", 1, LONG2, op3(I,E,R)((19)|((1)<<8)|((5)<<16)), 0 },
653/*6a*/ { "push", 0, QUAD3, op1(Ibs)(22), 0 },
654/*6b*/ { "imul", 1, LONG2, op3(Ibs,E,R)((22)|((1)<<8)|((5)<<16)),0 },
655/*6c*/ { "ins", 0, BYTE0, op2(DX, DI)((13)|((15)<<8)), 0 },
656/*6d*/ { "ins", 0, LONG2, op2(DX, DI)((13)|((15)<<8)), 0 },
657/*6e*/ { "outs", 0, BYTE0, op2(SI, DX)((14)|((13)<<8)), 0 },
658/*6f*/ { "outs", 0, LONG2, op2(SI, DX)((14)|((13)<<8)), 0 },
659
660/*70*/ { "jo", 0, NONE8, op1(Db)(26), 0 },
661/*71*/ { "jno", 0, NONE8, op1(Db)(26), 0 },
662/*72*/ { "jb", 0, NONE8, op1(Db)(26), 0 },
663/*73*/ { "jnb", 0, NONE8, op1(Db)(26), 0 },
664/*74*/ { "jz", 0, NONE8, op1(Db)(26), 0 },
665/*75*/ { "jnz", 0, NONE8, op1(Db)(26), 0 },
666/*76*/ { "jbe", 0, NONE8, op1(Db)(26), 0 },
667/*77*/ { "jnbe", 0, NONE8, op1(Db)(26), 0 },
668
669/*78*/ { "js", 0, NONE8, op1(Db)(26), 0 },
670/*79*/ { "jns", 0, NONE8, op1(Db)(26), 0 },
671/*7a*/ { "jp", 0, NONE8, op1(Db)(26), 0 },
672/*7b*/ { "jnp", 0, NONE8, op1(Db)(26), 0 },
673/*7c*/ { "jl", 0, NONE8, op1(Db)(26), 0 },
674/*7d*/ { "jnl", 0, NONE8, op1(Db)(26), 0 },
675/*7e*/ { "jle", 0, NONE8, op1(Db)(26), 0 },
676/*7f*/ { "jnle", 0, NONE8, op1(Db)(26), 0 },
677
678/*80*/ { NULL((void *)0), 1, BYTE0, op2(I, E)((19)|((1)<<8)), db_Grp1 },
679/*81*/ { NULL((void *)0), 1, LONG2, op2(I, E)((19)|((1)<<8)), db_Grp1 },
680/*82*/ { NULL((void *)0), 1, BYTE0, op2(I, E)((19)|((1)<<8)), db_Grp1 },
681/*83*/ { NULL((void *)0), 1, LONG2, op2(Ibs,E)((22)|((1)<<8)), db_Grp1 },
682/*84*/ { "test", 1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
683/*85*/ { "test", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
684/*86*/ { "xchg", 1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
685/*87*/ { "xchg", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
686
687/*88*/ { "mov", 1, BYTE0, op2(R, E)((5)|((1)<<8)), 0 },
688/*89*/ { "mov", 1, LONG2, op2(R, E)((5)|((1)<<8)), 0 },
689/*8a*/ { "mov", 1, BYTE0, op2(E, R)((1)|((5)<<8)), 0 },
690/*8b*/ { "mov", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
691/*8c*/ { "mov", 1, NONE8, op2(S, Ew)((8)|((3)<<8)), 0 },
692/*8d*/ { "lea", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
693/*8e*/ { "mov", 1, NONE8, op2(Ew, S)((3)|((8)<<8)), 0 },
694/*8f*/ { "pop", 1, QUAD3, op1(Dl)(27), 0 },
695
696/*90*/ { "nop", 0, NONE8, 0, 0 },
697/*91*/ { "xchg", 0, LONG2, op2(A, Ri)((10)|((7)<<8)), 0 },
698/*92*/ { "xchg", 0, LONG2, op2(A, Ri)((10)|((7)<<8)), 0 },
699/*93*/ { "xchg", 0, LONG2, op2(A, Ri)((10)|((7)<<8)), 0 },
700/*94*/ { "xchg", 0, LONG2, op2(A, Ri)((10)|((7)<<8)), 0 },
701/*95*/ { "xchg", 0, LONG2, op2(A, Ri)((10)|((7)<<8)), 0 },
702/*96*/ { "xchg", 0, LONG2, op2(A, Ri)((10)|((7)<<8)), 0 },
703/*97*/ { "xchg", 0, LONG2, op2(A, Ri)((10)|((7)<<8)), 0 },
704
705/*98*/ { "cbw", 0, SDEP7, 0, "cwde\0cdqe" },
706/*99*/ { "cwd", 0, SDEP7, 0, "cdq\0cqo" },
707/*9a*/ { "", 0, NONE8, op1(OS)(30), 0 },
708/*9b*/ { "wait", 0, NONE8, 0, 0 },
709/*9c*/ { "pushf", 0, QUAD3, 0, 0 },
710/*9d*/ { "popf", 0, QUAD3, 0, 0 },
711/*9e*/ { "sahf", 0, NONE8, 0, 0 },
712/*9f*/ { "lahf", 0, NONE8, 0, 0 },
713
714/*a0*/ { "mov", 0, BYTE0, op2(O, A)((25)|((10)<<8)), 0 },
715/*a1*/ { "mov", 0, LONG2, op2(O, A)((25)|((10)<<8)), 0 },
716/*a2*/ { "mov", 0, BYTE0, op2(A, O)((10)|((25)<<8)), 0 },
717/*a3*/ { "mov", 0, LONG2, op2(A, O)((10)|((25)<<8)), 0 },
718/*a4*/ { "movs", 0, BYTE0, op2(SI,DI)((14)|((15)<<8)), 0 },
719/*a5*/ { "movs", 0, LONG2, op2(SI,DI)((14)|((15)<<8)), 0 },
720/*a6*/ { "cmps", 0, BYTE0, op2(SI,DI)((14)|((15)<<8)), 0 },
721/*a7*/ { "cmps", 0, LONG2, op2(SI,DI)((14)|((15)<<8)), 0 },
722
723/*a8*/ { "test", 0, BYTE0, op2(I, A)((19)|((10)<<8)), 0 },
724/*a9*/ { "test", 0, LONG2, op2(I, A)((19)|((10)<<8)), 0 },
725/*aa*/ { "stos", 0, BYTE0, op1(DI)(15), 0 },
726/*ab*/ { "stos", 0, LONG2, op1(DI)(15), 0 },
727/*ac*/ { "lods", 0, BYTE0, op1(SI)(14), 0 },
728/*ad*/ { "lods", 0, LONG2, op1(SI)(14), 0 },
729/*ae*/ { "scas", 0, BYTE0, op1(SI)(14), 0 },
730/*af*/ { "scas", 0, LONG2, op1(SI)(14), 0 },
731
732/*b0*/ { "mov", 0, BYTE0, op2(I, Ri)((19)|((7)<<8)), 0 },
733/*b1*/ { "mov", 0, BYTE0, op2(I, Ri)((19)|((7)<<8)), 0 },
734/*b2*/ { "mov", 0, BYTE0, op2(I, Ri)((19)|((7)<<8)), 0 },
735/*b3*/ { "mov", 0, BYTE0, op2(I, Ri)((19)|((7)<<8)), 0 },
736/*b4*/ { "mov", 0, BYTE0, op2(I, Ri)((19)|((7)<<8)), 0 },
737/*b5*/ { "mov", 0, BYTE0, op2(I, Ri)((19)|((7)<<8)), 0 },
738/*b6*/ { "mov", 0, BYTE0, op2(I, Ri)((19)|((7)<<8)), 0 },
739/*b7*/ { "mov", 0, BYTE0, op2(I, Ri)((19)|((7)<<8)), 0 },
740
741/*b8*/ { "mov", 0, LONG2, op2(I, Ri)((19)|((7)<<8)), 0 },
742/*b9*/ { "mov", 0, LONG2, op2(I, Ri)((19)|((7)<<8)), 0 },
743/*ba*/ { "mov", 0, LONG2, op2(I, Ri)((19)|((7)<<8)), 0 },
744/*bb*/ { "mov", 0, LONG2, op2(I, Ri)((19)|((7)<<8)), 0 },
745/*bc*/ { "mov", 0, LONG2, op2(I, Ri)((19)|((7)<<8)), 0 },
746/*bd*/ { "mov", 0, LONG2, op2(I, Ri)((19)|((7)<<8)), 0 },
747/*be*/ { "mov", 0, LONG2, op2(I, Ri)((19)|((7)<<8)), 0 },
748/*bf*/ { "mov", 0, LONG2, op2(I, Ri)((19)|((7)<<8)), 0 },
749
750/*c0*/ { NULL((void *)0), 1, BYTE0, op2(Ib, E)((21)|((1)<<8)), db_Grp2 },
751/*c1*/ { NULL((void *)0), 1, LONG2, op2(Ib, E)((21)|((1)<<8)), db_Grp2 },
752/*c2*/ { "ret", 0, NONE8, op1(Iw)(23), 0 },
753/*c3*/ { "ret", 0, NONE8, 0, 0 },
754/*c4*/ { "", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
755/*c5*/ { "", 1, LONG2, op2(E, R)((1)|((5)<<8)), 0 },
756/*c6*/ { "mov", 1, BYTE0, op2(I, E)((19)|((1)<<8)), 0 },
757/*c7*/ { "mov", 1, LONG2, op2(I, E)((19)|((1)<<8)), 0 },
758
759/*c8*/ { "enter", 0, NONE8, op2(Iq, Ib)((24)|((21)<<8)), 0 },
760/*c9*/ { "leave", 0, NONE8, 0, 0 },
761/*ca*/ { "lret", 0, NONE8, op1(Iw)(23), 0 },
762/*cb*/ { "lret", 0, NONE8, 0, 0 },
763/*cc*/ { "int", 0, NONE8, op1(o3)(29), 0 },
764/*cd*/ { "int", 0, NONE8, op1(Ib)(21), 0 },
765/*ce*/ { "", 0, NONE8, 0, 0 },
766/*cf*/ { "iret", 0, NONE8, 0, 0 },
767
768/*d0*/ { NULL((void *)0), 1, BYTE0, op2(o1, E)((28)|((1)<<8)), db_Grp2 },
769/*d1*/ { NULL((void *)0), 1, LONG2, op2(o1, E)((28)|((1)<<8)), db_Grp2 },
770/*d2*/ { NULL((void *)0), 1, BYTE0, op2(CL, E)((12)|((1)<<8)), db_Grp2 },
771/*d3*/ { NULL((void *)0), 1, LONG2, op2(CL, E)((12)|((1)<<8)), db_Grp2 },
772/*d4*/ { "", 1, NONE8, op1(Iba)(37), 0 },
773/*d5*/ { "", 1, NONE8, op1(Iba)(37), 0 },
774/*d6*/ { ".byte\t0xd6",0, NONE8, 0, 0 },
775/*d7*/ { "xlat", 0, BYTE0, op1(BX)(11), 0 },
776
777/* d8 to df block is ignored: direct test in code handles them */
778/*d8*/ { "", 1, NONE8, 0, db_Esc8 },
779/*d9*/ { "", 1, NONE8, 0, db_Esc9 },
780/*da*/ { "", 1, NONE8, 0, db_Esca },
781/*db*/ { "", 1, NONE8, 0, db_Escb },
782/*dc*/ { "", 1, NONE8, 0, db_Escc },
783/*dd*/ { "", 1, NONE8, 0, db_Escd },
784/*de*/ { "", 1, NONE8, 0, db_Esce },
785/*df*/ { "", 1, NONE8, 0, db_Escf },
786
787/*e0*/ { "loopne",0, NONE8, op1(Db)(26), 0 },
788/*e1*/ { "loope", 0, NONE8, op1(Db)(26), 0 },
789/*e2*/ { "loop", 0, NONE8, op1(Db)(26), 0 },
790/*e3*/ { "jcxz", 0, SDEP7, op1(Db)(26), "jecxz\0jrcxz" },
791/*e4*/ { "in", 0, BYTE0, op2(Ib, A)((21)|((10)<<8)), 0 },
792/*e5*/ { "in", 0, LONG2, op2(Ib, A)((21)|((10)<<8)) , 0 },
793/*e6*/ { "out", 0, BYTE0, op2(A, Ib)((10)|((21)<<8)), 0 },
794/*e7*/ { "out", 0, LONG2, op2(A, Ib)((10)|((21)<<8)) , 0 },
795
796/*e8*/ { "call", 0, QUAD3, op1(Dl)(27), 0 },
797/*e9*/ { "jmp", 0, NONE8, op1(Dl)(27), 0 },
798/*ea*/ { "", 0, NONE8, op1(OS)(30), 0 },
799/*eb*/ { "jmp", 0, NONE8, op1(Db)(26), 0 },
800/*ec*/ { "in", 0, BYTE0, op2(DX, A)((13)|((10)<<8)), 0 },
801/*ed*/ { "in", 0, LONG2, op2(DX, A)((13)|((10)<<8)) , 0 },
802/*ee*/ { "out", 0, BYTE0, op2(A, DX)((10)|((13)<<8)), 0 },
803/*ef*/ { "out", 0, LONG2, op2(A, DX)((10)|((13)<<8)) , 0 },
804
805/*f0*/ { "", 0, NONE8, 0, 0 },
806/*f1*/ { "", 0, NONE8, 0, 0 },
807/*f2*/ { "", 0, NONE8, 0, 0 },
808/*f3*/ { "", 0, NONE8, 0, 0 },
809/*f4*/ { "hlt", 0, NONE8, 0, 0 },
810/*f5*/ { "cmc", 0, NONE8, 0, 0 },
811/*f6*/ { "", 1, BYTE0, 0, db_Grp3 },
812/*f7*/ { "", 1, LONG2, 0, db_Grp3 },
813
814/*f8*/ { "clc", 0, NONE8, 0, 0 },
815/*f9*/ { "stc", 0, NONE8, 0, 0 },
816/*fa*/ { "cli", 0, NONE8, 0, 0 },
817/*fb*/ { "sti", 0, NONE8, 0, 0 },
818/*fc*/ { "cld", 0, NONE8, 0, 0 },
819/*fd*/ { "std", 0, NONE8, 0, 0 },
820/*fe*/ { "", 1, RDEP9, 0, db_Grp4 },
821/*ff*/ { "", 1, RDEP9, 0, db_Grp5 },
822};
823
824struct inst db_bad_inst =
825 { "???", 0, NONE8, 0, 0 }
826;
827
828#define REX_W(rex)(((rex) & 0x8) == 0x8) (((rex) & 0x8) == 0x8) /* 64-bit operand size */
829#define REX_R(rex)(((rex) & 0x4) << 1) (((rex) & 0x4) << 1) /* ModRM reg field extension */
830#define REX_X(rex)(((rex) & 0x2) << 2) (((rex) & 0x2) << 2) /* SIB index field extension */
831#define REX_B(rex)(((rex) & 0x1) << 3) (((rex) & 0x1) << 3) /* ModRM r/m and SIB base ext */
832
833#define f_mod(byte)((byte)>>6) ((byte)>>6)
834#define f_reg(byte, rex)((((byte)>>3)&0x7) + (((rex) & 0x4) << 1)
) ((((byte)>>3)&0x7) + REX_R(rex)(((rex) & 0x4) << 1))
835#define f_rm(byte, rex)(((byte)&0x7) + (((rex) & 0x1) << 3)) (((byte)&0x7) + REX_B(rex)(((rex) & 0x1) << 3))
836
837#define sib_ss(byte)((byte)>>6) ((byte)>>6)
838#define sib_index(byte, rex)((((byte)>>3)&0x7) + (((rex) & 0x2) << 2)
) ((((byte)>>3)&0x7) + REX_X(rex)(((rex) & 0x2) << 2))
839#define sib_base(byte, rex)(((byte)&0x7) + (((rex) & 0x1) << 3)) (((byte)&0x7) + REX_B(rex)(((rex) & 0x1) << 3))
840
841struct i_addr {
842 int is_reg; /* if reg, reg number is in 'disp' */
843 int disp;
844 char * base;
845 char * index;
846 int ss;
847};
848
849char * db_index_reg_16[8] = {
850 "%bx,%si",
851 "%bx,%di",
852 "%bp,%si",
853 "%bp,%di",
854 "%si",
855 "%di",
856 "%bp",
857 "%bx"
858};
859
860char * db_reg[4][16] = {
861 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh",
862 "%r8b", "%r9b", "%r10b", "%r11b", "%r12b", "%r13b", "%r14b", "%r15b"},
863 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di",
864 "%r8w", "%r9w", "%r10w", "%r11w", "%r12w", "%r13w", "%r14w", "%r15w"},
865 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi",
866 "%r8d", "%r9d", "%r10d", "%r11d", "%r12d", "%r13d", "%r14d", "%r15d"},
867 { "%rax", "%rcx", "%rdx", "%rbx", "%rsp", "%rbp", "%rsi", "%rdi",
868 "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15" }
869};
870
871char * db_seg_reg[8] = {
872 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
873};
874
875/*
876 * lengths for size attributes
877 */
878int db_lengths[] = {
879 1, /* BYTE */
880 2, /* WORD */
881 4, /* LONG */
882 8, /* QUAD */
883 4, /* SNGL */
884 8, /* DBLR */
885 10, /* EXTR */
886};
887
888#define get_value_inc(result, loc, size, is_signed)do { result = db_get_value((loc), (size), (is_signed)); (loc)
+= (size); } while (0) \
889 do { \
890 result = db_get_value((loc), (size), (is_signed)); \
891 (loc) += (size); \
892 } while (0)
893
894
895vaddr_t db_read_address(vaddr_t, int, int, int, struct i_addr *);
896void db_print_address(char *, int, struct i_addr *);
897vaddr_t db_disasm_esc(vaddr_t, int, int, int, int, char *);
898vaddr_t db_disasm_3dnow(vaddr_t, int, int, int, char *);
899
900/*
901 * Read address at location and return updated location.
902 */
903vaddr_t
904db_read_address(vaddr_t loc, int short_addr, int regmodrm, int rex,
905 struct i_addr *addrp)
906{
907 int mod, rm, sib, index, disp, size;
908
909 size = (short_addr
21.1
'short_addr' is 0
 ? LONG2 : QUAD3);
22
←
'?' condition is false
→
910 mod = f_mod(regmodrm)((regmodrm)>>6);
911 rm = f_rm(regmodrm, rex)(((regmodrm)&0x7) + (((rex) & 0x1) << 3));
912
913 if (mod
22.1
'mod' is not equal to 3
 == 3) {
23
←
Taking false branch
→
914 addrp->is_reg = 1;
915 addrp->disp = rm;
916 return (loc);
917 }
918 addrp->is_reg = 0;
919 addrp->index = 0;
920
921 if (rm == 4 || rm == 12) {
24
←
Assuming 'rm' is not equal to 4
→
25
←
Assuming 'rm' is not equal to 12
→
26
←
Taking false branch
→
922 get_value_inc(sib, loc, 1, 0)do { sib = db_get_value((loc), (1), (0)); (loc) += (1); } while
(0);
923 rm = sib_base(sib, rex)(((sib)&0x7) + (((rex) & 0x1) << 3));
924 index = sib_index(sib, rex)((((sib)>>3)&0x7) + (((rex) & 0x2) << 2));
925 if (index != 4)
926 addrp->index = db_reg[size][index];
927 addrp->ss = sib_ss(sib)((sib)>>6);
928 }
929
930 switch (mod) {
27
←
'Default' branch taken. Execution continues on line 951
→
931 case 0:
932 if (rm == 5) {
933 get_value_inc(addrp->disp, loc, 4, 0)do { addrp->disp = db_get_value((loc), (4), (0)); (loc) +=
(4); } while (0);
934 addrp->base = 0;
935 } else {
936 addrp->disp = 0;
937 addrp->base = db_reg[size][rm];
938 }
939 break;
940 case 1:
941 get_value_inc(disp, loc, 1, 1)do { disp = db_get_value((loc), (1), (1)); (loc) += (1); } while
(0);
942 addrp->disp = disp;
943 addrp->base = db_reg[size][rm];
944 break;
945 case 2:
946 get_value_inc(disp, loc, 4, 0)do { disp = db_get_value((loc), (4), (0)); (loc) += (4); } while
(0);
947 addrp->disp = disp;
948 addrp->base = db_reg[size][rm];
949 break;
950 }
951 return (loc);
28
←
Returning without writing to 'addrp->disp'
→
952}
953
954void
955db_print_address(char *seg, int size, struct i_addr *addrp)
956{
957 if (addrp->is_reg
32.1
Field 'is_reg' is 0
) {
33
←
Taking false branch
→
958 db_printf("%s", db_reg[size][addrp->disp]);
959 return;
960 }
961
962 if (seg
33.1
'seg' is null
)
34
←
Taking false branch
→
963 db_printf("%s:", seg);
964
965 db_printsym((vaddr_t)addrp->disp, DB_STGY_ANY0, db_printf);
35
←
1st function call argument is an uninitialized value
966 if (addrp->base != 0 || addrp->index != 0) {
967 db_printf("(");
968 if (addrp->base)
969 db_printf("%s", addrp->base);
970 if (addrp->index)
971 db_printf(",%s,%d", addrp->index, 1<<addrp->ss);
972 db_printf(")");
973 }
974}
975
976/*
977 * Disassemble 3DNow! instruction and return updated location.
978 */
979vaddr_t
980db_disasm_3dnow(vaddr_t loc, int short_addr, int size, int rex, char *seg)
981{
982 int regmodrm, sib, displacement, opcode;
983
984 get_value_inc(regmodrm, loc, 1, 0)do { regmodrm = db_get_value((loc), (1), (0)); (loc) += (1); }
while (0);
985 get_value_inc(sib, loc, 1, 0)do { sib = db_get_value((loc), (1), (0)); (loc) += (1); } while
(0);
986 get_value_inc(displacement, loc, 1, 0)do { displacement = db_get_value((loc), (1), (0)); (loc) += (
1); } while (0);
987 get_value_inc(opcode, loc, 1, 0)do { opcode = db_get_value((loc), (1), (0)); (loc) += (1); } while
(0);
988
989 /* XXX fix later... */
990 db_printf("<3DNow! instruction>");
991
992 return (loc);
993}
994
995/*
996 * Disassemble floating-point ("escape") instruction
997 * and return updated location.
998 */
999vaddr_t
1000db_disasm_esc(vaddr_t loc, int inst, int short_addr, int size, int rex,
1001 char *seg)
1002{
1003 int regmodrm;
1004 struct finst *fp;
1005 int mod;
1006 struct i_addr address;
1007 char * name;
1008
1009 get_value_inc(regmodrm, loc, 1, 0)do { regmodrm = db_get_value((loc), (1), (0)); (loc) += (1); }
while (0);
16
←
Loop condition is false. Exiting loop
→
1010 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm, 0)((((regmodrm)>>3)&0x7) + (((0) & 0x4) << 1
))];
1011 mod = f_mod(regmodrm)((regmodrm)>>6);
1012 if (mod != 3) {
17
←
Assuming 'mod' is not equal to 3
→
18
←
Taking true branch
→
1013 if (*fp->f_name == '\0') {
19
←
Assuming the condition is false
→
20
←
Taking false branch
→
1014 db_printf("<bad instruction>");
1015 return (loc);
1016 }
1017
1018 /*
1019 * Normal address modes.
1020 */
1021 loc = db_read_address(loc, short_addr, regmodrm, rex, &address);
21
←
Calling 'db_read_address'
→
29
←
Returning from 'db_read_address'
→
1022 db_printf("%s", fp->f_name);
1023 switch (fp->f_size) {
30
←
Control jumps to the 'default' case at line 1042
→
1024 case SNGL4:
1025 db_printf("s");
1026 break;
1027 case DBLR5:
1028 db_printf("l");
1029 break;
1030 case EXTR6:
1031 db_printf("t");
1032 break;
1033 case WORD1:
1034 db_printf("s");
1035 break;
1036 case LONG2:
1037 db_printf("l");
1038 break;
1039 case QUAD3:
1040 db_printf("q");
1041 break;
1042 default:
1043 break;
31
←
 Execution continues on line 1045
→
1044 }
1045 db_printf("\t");
1046 db_print_address(seg, BYTE0, &address);
32
←
Calling 'db_print_address'
→
1047 } else {
1048 /*
1049 * 'reg-reg' - special formats
1050 */
1051 switch (fp->f_rrmode) {
1052 case op2(ST,STI)((31)|((32)<<8)):
1053 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1054 db_printf("%s\t%%st,%%st(%d)",name, f_rm(regmodrm, 0)(((regmodrm)&0x7) + (((0) & 0x1) << 3)));
1055 break;
1056 case op2(STI,ST)((32)|((31)<<8)):
1057 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1058 db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm, 0)(((regmodrm)&0x7) + (((0) & 0x1) << 3)));
1059 break;
1060 case op1(STI)(32):
1061 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1062 db_printf("%s\t%%st(%d)",name, f_rm(regmodrm, 0)(((regmodrm)&0x7) + (((0) & 0x1) << 3)));
1063 break;
1064 case op1(X)(33):
1065 name = ((char * const *)fp->f_rrname)[f_rm(regmodrm,0)(((regmodrm)&0x7) + (((0) & 0x1) << 3))];
1066 if (*name == '\0')
1067 goto bad;
1068 db_printf("%s", name);
1069 break;
1070 case op1(XA)(34):
1071 name = ((char * const *)fp->f_rrname)[f_rm(regmodrm,0)(((regmodrm)&0x7) + (((0) & 0x1) << 3))];
1072 if (*name == '\0')
1073 goto bad;
1074 db_printf("%s\t%%ax", name);
1075 break;
1076 default:
1077 bad:
1078 db_printf("<bad instruction>");
1079 break;
1080 }
1081 }
1082
1083 return (loc);
1084}
1085
1086/*
1087 * Disassemble instruction at 'loc'. 'altfmt' specifies an
1088 * (optional) alternate format. Return address of start of
1089 * next instruction.
1090 */
1091vaddr_t
1092db_disasm(vaddr_t loc, int altfmt)
1093{
1094 int inst;
1095 int size;
1096 int short_addr;
1097 char * seg;
1098 struct inst * ip;
1099 char * i_name;
1100 int i_size;
1101 int i_mode;
1102 int regmodrm = 0;
1103 int first;
1104 int displ;
1105 int prefix;
1106 long imm;
1107 int imm2;
1108 int len;
1109 int rex = 0;
1110 int segovr_grp;
1111 int repe, repne;
1112 struct i_addr address;
1113 vaddr_t loc_orig = loc;
1114 char tmpfmt[28];
1115
1116 get_value_inc(inst, loc, 1, 0)do { inst = db_get_value((loc), (1), (0)); (loc) += (1); } while
(0);
1
Loop condition is false. Exiting loop
→
1117 short_addr = 0;
1118 size = LONG2;
1119 seg = 0;
1120 segovr_grp = 0;
1121 repe = 0;
1122 repne = 0;
1123
1124 /*
1125 * Get prefixes
1126 */
1127 prefix = 1;
1128 do {
5
←
Loop condition is false. Exiting loop
→
1129 switch (inst) {
2
←
Control jumps to the 'default' case at line 1169
→
1130 case 0x66: /* data16 */
1131 size = WORD1;
1132 break;
1133 case 0x67:
1134 short_addr = 1;
1135 break;
1136 case 0x26:
1137 segovr_grp++;
1138 db_printf(" <segment override prefix ignored>");
1139 break;
1140 case 0x36:
1141 db_printf(" <segment override prefix ignored>");
1142 segovr_grp++;
1143 break;
1144 case 0x2e:
1145 db_printf(" <segment override prefix ignored>");
1146 segovr_grp++;
1147 break;
1148 case 0x3e:
1149 db_printf(" <segment override prefix ignored>");
1150 segovr_grp++;
1151 break;
1152 case 0x64:
1153 segovr_grp++;
1154 seg = "%fs";
1155 break;
1156 case 0x65:
1157 segovr_grp++;
1158 seg = "%gs";
1159 break;
1160 case 0xf0:
1161 db_printf("lock ");
1162 break;
1163 case 0xf2:
1164 repne++;
1165 break;
1166 case 0xf3:
1167 repe++;
1168 break;
1169 default:
1170 prefix = 0;
1171 break;
3
←
 Execution continues on line 1173
→
1172 }
1173 if (prefix
3.1
'prefix' is 0
)
4
←
Taking false branch
→
1174 get_value_inc(inst, loc, 1, 0)do { inst = db_get_value((loc), (1), (0)); (loc) += (1); } while
(0);
1175 } while (prefix);
1176 if (segovr_grp
5.1
'segovr_grp' is <= 1
 > 1)
6
←
Taking false branch
→
1177 seg = "<bad segment override prefix combination> ";
1178 if (repe
6.1
'repe' is <= 0
 > 0 && repne > 0)
1179 db_printf("<bad repeat prefex combination> ");
1180 else if (repe
6.2
'repe' is <= 0
 > 0)
7
←
Taking false branch
→
1181 db_printf("repe "); /* XXX "rep" if not CMPSx or SCASx */
1182 else if (repne
7.1
'repne' is <= 0
 > 0)
8
←
Taking false branch
→
1183 db_printf("repne ");
1184
1185 if (inst >= 0x40 && inst <= 0x4f) {
9
←
Assuming 'inst' is >= 64
→
10
←
Assuming 'inst' is > 79
→
11
←
Taking false branch
→
1186 // rex page 14
1187 rex = inst;
1188 if (REX_W(rex)(((rex) & 0x8) == 0x8))
1189 size = QUAD3;
1190 get_value_inc(inst, loc, 1, 0)do { inst = db_get_value((loc), (1), (0)); (loc) += (1); } while
(0);
1191 }
1192
1193 if (inst >= 0xd8 && inst <= 0xdf) {
12
←
Assuming 'inst' is >= 216
→
13
←
Assuming 'inst' is <= 223
→
14
←
Taking true branch
→
1194 loc = db_disasm_esc(loc, inst, short_addr, size, rex, seg);
15
←
Calling 'db_disasm_esc'
→
1195 goto done;
1196 }
1197
1198 if (inst == 0x0f) {
1199 get_value_inc(inst, loc, 1, 0)do { inst = db_get_value((loc), (1), (0)); (loc) += (1); } while
(0);
1200 if (inst == 0x0f) {
1201 loc = db_disasm_3dnow(loc, short_addr, size, rex, seg);
1202 goto done;
1203 }
1204 ip = db_inst_0f[inst>>4];
1205 if (ip == 0)
1206 ip = &db_bad_inst;
1207 else
1208 ip = &ip[inst&0xf];
1209 } else {
1210 ip = &db_inst_table[inst];
1211 }
1212
1213 if (ip->i_has_modrm) {
1214 get_value_inc(regmodrm, loc, 1, 0)do { regmodrm = db_get_value((loc), (1), (0)); (loc) += (1); }
while (0);
1215 loc = db_read_address(loc, short_addr, regmodrm, rex, &address);
1216 }
1217
1218 i_name = ip->i_name;
1219 i_size = ip->i_size;
1220 i_mode = ip->i_mode;
1221
1222 if (i_size == RDEP9) {
1223 /* sub-table to handle dependency on reg from ModR/M byte */
1224 ip = (struct inst *)ip->i_extra;
1225 ip = &ip[f_reg(regmodrm, 0)((((regmodrm)>>3)&0x7) + (((0) & 0x4) << 1
))];
1226 i_name = ip->i_name;
1227 i_mode = ip->i_mode;
1228 i_size = ip->i_size;
1229 } else if (i_name == NULL((void *)0)) {
1230 i_name = ((char **)ip->i_extra)[f_reg(regmodrm, 0)((((regmodrm)>>3)&0x7) + (((0) & 0x4) << 1
))];
1231 } else if (ip->i_extra == db_Grp3) {
1232 ip = (struct inst *)ip->i_extra;
1233 ip = &ip[f_reg(regmodrm, 0)((((regmodrm)>>3)&0x7) + (((0) & 0x4) << 1
))];
1234 i_name = ip->i_name;
1235 i_mode = ip->i_mode;
1236 }
1237
1238 /* ModR/M-specific operation? */
1239 if ((i_mode & 0xFF) == MEx38) {
1240 if (f_mod(regmodrm)((regmodrm)>>6) != 3)
1241 i_mode = op1(E)(1);
1242 else {
1243 /* unknown extension? */
1244 if (f_rm(regmodrm, 0)(((regmodrm)&0x7) + (((0) & 0x1) << 3)) > (i_mode >> 8))
1245 i_name = "";
1246 else {
1247 /* skip to the specific op */
1248 int i = f_rm(regmodrm, 0)(((regmodrm)&0x7) + (((0) & 0x1) << 3));
1249 i_name = ip->i_extra;
1250 while (i-- > 0)
1251 while (*i_name++)
1252 ;
1253 }
1254 i_mode = 0;
1255 }
1256 }
1257
1258 if (i_size == SDEP7) {
1259 if (size == WORD1)
1260 db_printf("%s", i_name);
1261 else if (size == LONG2)
1262 db_printf("%s", (char *)ip->i_extra);
1263 else {
1264 char *cp = ip->i_extra;
1265 while (*cp)
1266 cp++;
1267 cp++;
1268 db_printf("%s", cp);
1269 }
1270 } else {
1271 db_printf("%s", i_name);
1272 if (i_size != NONE8) {
1273 if (i_size == BYTE0) {
1274 db_printf("b");
1275 size = BYTE0;
1276 } else if (REX_W(rex)(((rex) & 0x8) == 0x8)) {
1277 db_printf("q");
1278 size = QUAD3;
1279 } else if (i_size == WORD1) {
1280 db_printf("w");
1281 size = WORD1;
1282 } else if (i_size == QUAD3) {
1283 size = QUAD3;
1284 db_printf("q");
1285 } else if (size == WORD1) {
1286 db_printf("w");
1287 } else {
1288 db_printf("l");
1289 }
1290 }
1291 }
1292 db_printf("\t");
1293 for (first = 1; i_mode != 0; i_mode >>= 8, first = 0) {
1294 if (!first)
1295 db_printf(",");
1296
1297 switch (i_mode & 0xFF) {
1298 case E1: //XXX
1299 db_print_address(seg, size, &address);
1300 break;
1301 case Eind2: //XXX
1302 db_printf("*");
1303 db_print_address(seg, size, &address);
1304 break;
1305 case Ew3: //XXX
1306 db_print_address(seg, WORD1, &address);
1307 break;
1308 case Eb4: //XXX
1309 db_print_address(seg, BYTE0, &address);
1310 break;
1311 case R5:
1312 db_printf("%s", db_reg[size][f_reg(regmodrm, rex)((((regmodrm)>>3)&0x7) + (((rex) & 0x4) <<
1))]);
1313 break;
1314 case Rw6:
1315 db_printf("%s", db_reg[WORD1][f_reg(regmodrm, rex)((((regmodrm)>>3)&0x7) + (((rex) & 0x4) <<
1))]);
1316 break;
1317 case Ri7:
1318 db_printf("%s", db_reg[size][f_rm(inst, rex)(((inst)&0x7) + (((rex) & 0x1) << 3))]);
1319 break;
1320 case Ril36:
1321 db_printf("%s", db_reg[LONG2][f_rm(inst, rex)(((inst)&0x7) + (((rex) & 0x1) << 3))]);
1322 break;
1323 case S8:
1324 db_printf("%s", db_seg_reg[f_reg(regmodrm, 0)((((regmodrm)>>3)&0x7) + (((0) & 0x4) << 1
))]);
1325 break;
1326 case Si9:
1327 db_printf("%s", db_seg_reg[f_reg(inst, 0)((((inst)>>3)&0x7) + (((0) & 0x4) << 1))]);
1328 break;
1329 case A10:
1330 db_printf("%s", db_reg[size][0]); /* acc */
1331 break;
1332 case BX11:
1333 if (seg)
1334 db_printf("%s:", seg);
1335 db_printf("(%s)", short_addr ? "%ebx" : "%rbx");
1336 break;
1337 case CL12:
1338 db_printf("%%cl");
1339 break;
1340 case DX13:
1341 db_printf("%%dx");
1342 break;
1343 case SI14:
1344 if (seg)
1345 db_printf("%s:", seg);
1346 db_printf("(%s)", short_addr ? "%esi" : "%rsi");
1347 break;
1348 case DI15:
1349 db_printf("%%es:(%s)", short_addr ? "%edi" : "%rdi");
1350 break;
1351 case CR16:
1352 db_printf("%%cr%d", f_reg(regmodrm, rex)((((regmodrm)>>3)&0x7) + (((rex) & 0x4) <<
1)));
1353 break;
1354 case DR17:
1355 db_printf("%%dr%d", f_reg(regmodrm, rex)((((regmodrm)>>3)&0x7) + (((rex) & 0x4) <<
1)));
1356 break;
1357 case TR18: //XXX
1358 db_printf("%%tr%d", f_reg(regmodrm, rex)((((regmodrm)>>3)&0x7) + (((rex) & 0x4) <<
1)));
1359 break;
1360 case I19:
1361 len = db_lengths[size];
1362 get_value_inc(imm, loc, len, 0)do { imm = db_get_value((loc), (len), (0)); (loc) += (len); }
while (0);
1363 db_printf("$%s", db_format(tmpfmt, sizeof tmpfmt,
1364 (int)imm, DB_FORMAT_N3, 1, 0));
1365 break;
1366 case Is20:
1367 len = db_lengths[size];
1368 get_value_inc(imm, loc, len, 1)do { imm = db_get_value((loc), (len), (1)); (loc) += (len); }
while (0);
1369 db_printf("$%s", db_format(tmpfmt, sizeof tmpfmt,
1370 (int)imm, DB_FORMAT_R2, 1, 0));
1371 break;
1372 case Ib21:
1373 get_value_inc(imm, loc, 1, 0)do { imm = db_get_value((loc), (1), (0)); (loc) += (1); } while
(0);
1374 db_printf("$%s", db_format(tmpfmt, sizeof tmpfmt,
1375 (int)imm, DB_FORMAT_N3, 1, 0));
1376 break;
1377 case Iba37:
1378 get_value_inc(imm, loc, 1, 0)do { imm = db_get_value((loc), (1), (0)); (loc) += (1); } while
(0);
1379 if (imm != 0x0a)
1380 db_printf("$%s", db_format(tmpfmt, sizeof tmpfmt,
1381 (int)imm, DB_FORMAT_N3, 1, 0));
1382 break;
1383 case Ibs22: //XXX
1384 get_value_inc(imm, loc, 1, 1)do { imm = db_get_value((loc), (1), (1)); (loc) += (1); } while
(0);
1385 if (size == WORD1)
1386 imm &= 0xFFFF;
1387 db_printf("$%s", db_format(tmpfmt, sizeof tmpfmt,
1388 (int)imm, DB_FORMAT_R2, 1, 0));
1389 break;
1390 case Iw23:
1391 get_value_inc(imm, loc, 2, 0)do { imm = db_get_value((loc), (2), (0)); (loc) += (2); } while
(0);
1392 db_printf("$%s", db_format(tmpfmt, sizeof tmpfmt,
1393 (int)imm, DB_FORMAT_N3, 1, 0));
1394 break;
1395 case Iq24:
1396 get_value_inc(imm, loc, 8, 1)do { imm = db_get_value((loc), (8), (1)); (loc) += (8); } while
(0);
1397 db_printf("$%s", db_format(tmpfmt, sizeof tmpfmt,
1398 (int)((imm >> 32) & 0xffffffff), DB_FORMAT_R2, 1, 0));
1399 db_printf(" %s", db_format(tmpfmt, sizeof tmpfmt,
1400 (int)(imm & 0xffffffff), DB_FORMAT_R2, 1, 0));
1401 break;
1402 case O25: //XXX
1403 if (short_addr)
1404 get_value_inc(displ, loc, 2, 1)do { displ = db_get_value((loc), (2), (1)); (loc) += (2); } while
(0);
1405 else
1406 get_value_inc(displ, loc, 4, 1)do { displ = db_get_value((loc), (4), (1)); (loc) += (4); } while
(0);
1407 if (seg)
1408 db_printf("%s:%s", seg, db_format(tmpfmt,
1409 sizeof tmpfmt, displ, DB_FORMAT_R2, 1, 0));
1410 else
1411 db_printsym((vaddr_t)displ, DB_STGY_ANY0,
1412 db_printf);
1413 break;
1414 case Db26: //XXX
1415 get_value_inc(displ, loc, 1, 1)do { displ = db_get_value((loc), (1), (1)); (loc) += (1); } while
(0);
1416 displ += loc;
1417 if (size == WORD1)
1418 displ &= 0xFFFF;
1419 db_printsym((vaddr_t)displ, DB_STGY_XTRN1, db_printf);
1420 break;
1421 case Dl27: //XXX
1422 len = db_lengths[size];
1423 get_value_inc(displ, loc, len, 0)do { displ = db_get_value((loc), (len), (0)); (loc) += (len);
} while (0);
1424 displ += loc;
1425 if (size == WORD1)
1426 displ &= 0xFFFF;
1427 db_printsym((vaddr_t)displ, DB_STGY_XTRN1, db_printf);
1428 break;
1429 case o128: //XXX
1430 db_printf("$1");
1431 break;
1432 case o329: //XXX
1433 db_printf("$3");
1434 break;
1435 case OS30: //XXX
1436 len = db_lengths[size];
1437 get_value_inc(imm, loc, len, 0)do { imm = db_get_value((loc), (len), (0)); (loc) += (len); }
while (0); /* offset */
1438 get_value_inc(imm2, loc, 2, 0)do { imm2 = db_get_value((loc), (2), (0)); (loc) += (2); } while
(0); /* segment */
1439 db_printf("$0x%#x", imm2);
1440 break;
1441 }
1442 }
1443
1444 if (altfmt == 0 && (inst == 0xe9 || inst == 0xeb)) {
1445 /*
1446 * GAS pads to longword boundary after unconditional jumps.
1447 */
1448 loc = (loc + (4-1)) & ~(4-1);
1449 }
1450done:
1451 if (loc - loc_orig > 15)
1452 db_printf(" <instruction too long>");
1453 if (altfmt) {
1454 db_printf("\n\t");
1455 while (loc_orig < loc) {
1456 get_value_inc(imm, loc_orig, 1, 0)do { imm = db_get_value((loc_orig), (1), (0)); (loc_orig) += (
1); } while (0);
1457 if (imm < 0x10)
1458 db_printf("0");
1459 db_printf("%x ", (int)imm);
1460 }
1461 }
1462 db_printf("\n");
1463 return (loc);
1464}