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[ThirdParty] Added WRK and luajit for load testing.
author MrJuneJune <me@mrjunejune.com>
date Thu, 22 Jan 2026 20:10:30 -0800
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1 ----------------------------------------------------------------------------
2 -- LuaJIT x86/x64 disassembler module.
3 --
4 -- Copyright (C) 2005-2023 Mike Pall. All rights reserved.
5 -- Released under the MIT license. See Copyright Notice in luajit.h
6 ----------------------------------------------------------------------------
7 -- This is a helper module used by the LuaJIT machine code dumper module.
8 --
9 -- Sending small code snippets to an external disassembler and mixing the
10 -- output with our own stuff was too fragile. So I had to bite the bullet
11 -- and write yet another x86 disassembler. Oh well ...
12 --
13 -- The output format is very similar to what ndisasm generates. But it has
14 -- been developed independently by looking at the opcode tables from the
15 -- Intel and AMD manuals. The supported instruction set is quite extensive
16 -- and reflects what a current generation Intel or AMD CPU implements in
17 -- 32 bit and 64 bit mode. Yes, this includes MMX, SSE, SSE2, SSE3, SSSE3,
18 -- SSE4.1, SSE4.2, SSE4a, AVX, AVX2 and even privileged and hypervisor
19 -- (VMX/SVM) instructions.
20 --
21 -- Notes:
22 -- * The (useless) a16 prefix, 3DNow and pre-586 opcodes are unsupported.
23 -- * No attempt at optimization has been made -- it's fast enough for my needs.
24 ------------------------------------------------------------------------------
25
26 local type = type
27 local sub, byte, format = string.sub, string.byte, string.format
28 local match, gmatch, gsub = string.match, string.gmatch, string.gsub
29 local lower, rep = string.lower, string.rep
30 local bit = require("bit")
31 local tohex = bit.tohex
32
33 -- Map for 1st opcode byte in 32 bit mode. Ugly? Well ... read on.
34 local map_opc1_32 = {
35 --0x
36 [0]="addBmr","addVmr","addBrm","addVrm","addBai","addVai","push es","pop es",
37 "orBmr","orVmr","orBrm","orVrm","orBai","orVai","push cs","opc2*",
38 --1x
39 "adcBmr","adcVmr","adcBrm","adcVrm","adcBai","adcVai","push ss","pop ss",
40 "sbbBmr","sbbVmr","sbbBrm","sbbVrm","sbbBai","sbbVai","push ds","pop ds",
41 --2x
42 "andBmr","andVmr","andBrm","andVrm","andBai","andVai","es:seg","daa",
43 "subBmr","subVmr","subBrm","subVrm","subBai","subVai","cs:seg","das",
44 --3x
45 "xorBmr","xorVmr","xorBrm","xorVrm","xorBai","xorVai","ss:seg","aaa",
46 "cmpBmr","cmpVmr","cmpBrm","cmpVrm","cmpBai","cmpVai","ds:seg","aas",
47 --4x
48 "incVR","incVR","incVR","incVR","incVR","incVR","incVR","incVR",
49 "decVR","decVR","decVR","decVR","decVR","decVR","decVR","decVR",
50 --5x
51 "pushUR","pushUR","pushUR","pushUR","pushUR","pushUR","pushUR","pushUR",
52 "popUR","popUR","popUR","popUR","popUR","popUR","popUR","popUR",
53 --6x
54 "sz*pushaw,pusha","sz*popaw,popa","boundVrm","arplWmr",
55 "fs:seg","gs:seg","o16:","a16",
56 "pushUi","imulVrmi","pushBs","imulVrms",
57 "insb","insVS","outsb","outsVS",
58 --7x
59 "joBj","jnoBj","jbBj","jnbBj","jzBj","jnzBj","jbeBj","jaBj",
60 "jsBj","jnsBj","jpeBj","jpoBj","jlBj","jgeBj","jleBj","jgBj",
61 --8x
62 "arith!Bmi","arith!Vmi","arith!Bmi","arith!Vms",
63 "testBmr","testVmr","xchgBrm","xchgVrm",
64 "movBmr","movVmr","movBrm","movVrm",
65 "movVmg","leaVrm","movWgm","popUm",
66 --9x
67 "nop*xchgVaR|pause|xchgWaR|repne nop","xchgVaR","xchgVaR","xchgVaR",
68 "xchgVaR","xchgVaR","xchgVaR","xchgVaR",
69 "sz*cbw,cwde,cdqe","sz*cwd,cdq,cqo","call farViw","wait",
70 "sz*pushfw,pushf","sz*popfw,popf","sahf","lahf",
71 --Ax
72 "movBao","movVao","movBoa","movVoa",
73 "movsb","movsVS","cmpsb","cmpsVS",
74 "testBai","testVai","stosb","stosVS",
75 "lodsb","lodsVS","scasb","scasVS",
76 --Bx
77 "movBRi","movBRi","movBRi","movBRi","movBRi","movBRi","movBRi","movBRi",
78 "movVRI","movVRI","movVRI","movVRI","movVRI","movVRI","movVRI","movVRI",
79 --Cx
80 "shift!Bmu","shift!Vmu","retBw","ret","vex*3$lesVrm","vex*2$ldsVrm","movBmi","movVmi",
81 "enterBwu","leave","retfBw","retf","int3","intBu","into","iretVS",
82 --Dx
83 "shift!Bm1","shift!Vm1","shift!Bmc","shift!Vmc","aamBu","aadBu","salc","xlatb",
84 "fp*0","fp*1","fp*2","fp*3","fp*4","fp*5","fp*6","fp*7",
85 --Ex
86 "loopneBj","loopeBj","loopBj","sz*jcxzBj,jecxzBj,jrcxzBj",
87 "inBau","inVau","outBua","outVua",
88 "callVj","jmpVj","jmp farViw","jmpBj","inBad","inVad","outBda","outVda",
89 --Fx
90 "lock:","int1","repne:rep","rep:","hlt","cmc","testb!Bm","testv!Vm",
91 "clc","stc","cli","sti","cld","std","incb!Bm","incd!Vm",
92 }
93 assert(#map_opc1_32 == 255)
94
95 -- Map for 1st opcode byte in 64 bit mode (overrides only).
96 local map_opc1_64 = setmetatable({
97 [0x06]=false, [0x07]=false, [0x0e]=false,
98 [0x16]=false, [0x17]=false, [0x1e]=false, [0x1f]=false,
99 [0x27]=false, [0x2f]=false, [0x37]=false, [0x3f]=false,
100 [0x60]=false, [0x61]=false, [0x62]=false, [0x63]="movsxdVrDmt", [0x67]="a32:",
101 [0x40]="rex*", [0x41]="rex*b", [0x42]="rex*x", [0x43]="rex*xb",
102 [0x44]="rex*r", [0x45]="rex*rb", [0x46]="rex*rx", [0x47]="rex*rxb",
103 [0x48]="rex*w", [0x49]="rex*wb", [0x4a]="rex*wx", [0x4b]="rex*wxb",
104 [0x4c]="rex*wr", [0x4d]="rex*wrb", [0x4e]="rex*wrx", [0x4f]="rex*wrxb",
105 [0x82]=false, [0x9a]=false, [0xc4]="vex*3", [0xc5]="vex*2", [0xce]=false,
106 [0xd4]=false, [0xd5]=false, [0xd6]=false, [0xea]=false,
107 }, { __index = map_opc1_32 })
108
109 -- Map for 2nd opcode byte (0F xx). True CISC hell. Hey, I told you.
110 -- Prefix dependent MMX/SSE opcodes: (none)|rep|o16|repne, -|F3|66|F2
111 local map_opc2 = {
112 --0x
113 [0]="sldt!Dmp","sgdt!Ump","larVrm","lslVrm",nil,"syscall","clts","sysret",
114 "invd","wbinvd",nil,"ud1",nil,"$prefetch!Bm","femms","3dnowMrmu",
115 --1x
116 "movupsXrm|movssXrvm|movupdXrm|movsdXrvm",
117 "movupsXmr|movssXmvr|movupdXmr|movsdXmvr",
118 "movhlpsXrm$movlpsXrm|movsldupXrm|movlpdXrm|movddupXrm",
119 "movlpsXmr||movlpdXmr",
120 "unpcklpsXrvm||unpcklpdXrvm",
121 "unpckhpsXrvm||unpckhpdXrvm",
122 "movlhpsXrm$movhpsXrm|movshdupXrm|movhpdXrm",
123 "movhpsXmr||movhpdXmr",
124 "$prefetcht!Bm","hintnopVm","hintnopVm","hintnopVm",
125 "hintnopVm","hintnopVm","hintnopVm","hintnopVm",
126 --2x
127 "movUmx$","movUmy$","movUxm$","movUym$","movUmz$",nil,"movUzm$",nil,
128 "movapsXrm||movapdXrm",
129 "movapsXmr||movapdXmr",
130 "cvtpi2psXrMm|cvtsi2ssXrvVmt|cvtpi2pdXrMm|cvtsi2sdXrvVmt",
131 "movntpsXmr|movntssXmr|movntpdXmr|movntsdXmr",
132 "cvttps2piMrXm|cvttss2siVrXm|cvttpd2piMrXm|cvttsd2siVrXm",
133 "cvtps2piMrXm|cvtss2siVrXm|cvtpd2piMrXm|cvtsd2siVrXm",
134 "ucomissXrm||ucomisdXrm",
135 "comissXrm||comisdXrm",
136 --3x
137 "wrmsr","rdtsc","rdmsr","rdpmc","sysenter","sysexit",nil,"getsec",
138 "opc3*38",nil,"opc3*3a",nil,nil,nil,nil,nil,
139 --4x
140 "cmovoVrm","cmovnoVrm","cmovbVrm","cmovnbVrm",
141 "cmovzVrm","cmovnzVrm","cmovbeVrm","cmovaVrm",
142 "cmovsVrm","cmovnsVrm","cmovpeVrm","cmovpoVrm",
143 "cmovlVrm","cmovgeVrm","cmovleVrm","cmovgVrm",
144 --5x
145 "movmskpsVrXm$||movmskpdVrXm$","sqrtpsXrm|sqrtssXrm|sqrtpdXrm|sqrtsdXrm",
146 "rsqrtpsXrm|rsqrtssXrvm","rcppsXrm|rcpssXrvm",
147 "andpsXrvm||andpdXrvm","andnpsXrvm||andnpdXrvm",
148 "orpsXrvm||orpdXrvm","xorpsXrvm||xorpdXrvm",
149 "addpsXrvm|addssXrvm|addpdXrvm|addsdXrvm","mulpsXrvm|mulssXrvm|mulpdXrvm|mulsdXrvm",
150 "cvtps2pdXrm|cvtss2sdXrvm|cvtpd2psXrm|cvtsd2ssXrvm",
151 "cvtdq2psXrm|cvttps2dqXrm|cvtps2dqXrm",
152 "subpsXrvm|subssXrvm|subpdXrvm|subsdXrvm","minpsXrvm|minssXrvm|minpdXrvm|minsdXrvm",
153 "divpsXrvm|divssXrvm|divpdXrvm|divsdXrvm","maxpsXrvm|maxssXrvm|maxpdXrvm|maxsdXrvm",
154 --6x
155 "punpcklbwPrvm","punpcklwdPrvm","punpckldqPrvm","packsswbPrvm",
156 "pcmpgtbPrvm","pcmpgtwPrvm","pcmpgtdPrvm","packuswbPrvm",
157 "punpckhbwPrvm","punpckhwdPrvm","punpckhdqPrvm","packssdwPrvm",
158 "||punpcklqdqXrvm","||punpckhqdqXrvm",
159 "movPrVSm","movqMrm|movdquXrm|movdqaXrm",
160 --7x
161 "pshufwMrmu|pshufhwXrmu|pshufdXrmu|pshuflwXrmu","pshiftw!Pvmu",
162 "pshiftd!Pvmu","pshiftq!Mvmu||pshiftdq!Xvmu",
163 "pcmpeqbPrvm","pcmpeqwPrvm","pcmpeqdPrvm","emms*|",
164 "vmreadUmr||extrqXmuu$|insertqXrmuu$","vmwriteUrm||extrqXrm$|insertqXrm$",
165 nil,nil,
166 "||haddpdXrvm|haddpsXrvm","||hsubpdXrvm|hsubpsXrvm",
167 "movVSmMr|movqXrm|movVSmXr","movqMmr|movdquXmr|movdqaXmr",
168 --8x
169 "joVj","jnoVj","jbVj","jnbVj","jzVj","jnzVj","jbeVj","jaVj",
170 "jsVj","jnsVj","jpeVj","jpoVj","jlVj","jgeVj","jleVj","jgVj",
171 --9x
172 "setoBm","setnoBm","setbBm","setnbBm","setzBm","setnzBm","setbeBm","setaBm",
173 "setsBm","setnsBm","setpeBm","setpoBm","setlBm","setgeBm","setleBm","setgBm",
174 --Ax
175 "push fs","pop fs","cpuid","btVmr","shldVmru","shldVmrc",nil,nil,
176 "push gs","pop gs","rsm","btsVmr","shrdVmru","shrdVmrc","fxsave!Dmp","imulVrm",
177 --Bx
178 "cmpxchgBmr","cmpxchgVmr","$lssVrm","btrVmr",
179 "$lfsVrm","$lgsVrm","movzxVrBmt","movzxVrWmt",
180 "|popcntVrm","ud2Dp","bt!Vmu","btcVmr",
181 "bsfVrm","bsrVrm|lzcntVrm|bsrWrm","movsxVrBmt","movsxVrWmt",
182 --Cx
183 "xaddBmr","xaddVmr",
184 "cmppsXrvmu|cmpssXrvmu|cmppdXrvmu|cmpsdXrvmu","$movntiVmr|",
185 "pinsrwPrvWmu","pextrwDrPmu",
186 "shufpsXrvmu||shufpdXrvmu","$cmpxchg!Qmp",
187 "bswapVR","bswapVR","bswapVR","bswapVR","bswapVR","bswapVR","bswapVR","bswapVR",
188 --Dx
189 "||addsubpdXrvm|addsubpsXrvm","psrlwPrvm","psrldPrvm","psrlqPrvm",
190 "paddqPrvm","pmullwPrvm",
191 "|movq2dqXrMm|movqXmr|movdq2qMrXm$","pmovmskbVrMm||pmovmskbVrXm",
192 "psubusbPrvm","psubuswPrvm","pminubPrvm","pandPrvm",
193 "paddusbPrvm","padduswPrvm","pmaxubPrvm","pandnPrvm",
194 --Ex
195 "pavgbPrvm","psrawPrvm","psradPrvm","pavgwPrvm",
196 "pmulhuwPrvm","pmulhwPrvm",
197 "|cvtdq2pdXrm|cvttpd2dqXrm|cvtpd2dqXrm","$movntqMmr||$movntdqXmr",
198 "psubsbPrvm","psubswPrvm","pminswPrvm","porPrvm",
199 "paddsbPrvm","paddswPrvm","pmaxswPrvm","pxorPrvm",
200 --Fx
201 "|||lddquXrm","psllwPrvm","pslldPrvm","psllqPrvm",
202 "pmuludqPrvm","pmaddwdPrvm","psadbwPrvm","maskmovqMrm||maskmovdquXrm$",
203 "psubbPrvm","psubwPrvm","psubdPrvm","psubqPrvm",
204 "paddbPrvm","paddwPrvm","padddPrvm","ud",
205 }
206 assert(map_opc2[255] == "ud")
207
208 -- Map for three-byte opcodes. Can't wait for their next invention.
209 local map_opc3 = {
210 ["38"] = { -- [66] 0f 38 xx
211 --0x
212 [0]="pshufbPrvm","phaddwPrvm","phadddPrvm","phaddswPrvm",
213 "pmaddubswPrvm","phsubwPrvm","phsubdPrvm","phsubswPrvm",
214 "psignbPrvm","psignwPrvm","psigndPrvm","pmulhrswPrvm",
215 "||permilpsXrvm","||permilpdXrvm",nil,nil,
216 --1x
217 "||pblendvbXrma",nil,nil,nil,
218 "||blendvpsXrma","||blendvpdXrma","||permpsXrvm","||ptestXrm",
219 "||broadcastssXrm","||broadcastsdXrm","||broadcastf128XrlXm",nil,
220 "pabsbPrm","pabswPrm","pabsdPrm",nil,
221 --2x
222 "||pmovsxbwXrm","||pmovsxbdXrm","||pmovsxbqXrm","||pmovsxwdXrm",
223 "||pmovsxwqXrm","||pmovsxdqXrm",nil,nil,
224 "||pmuldqXrvm","||pcmpeqqXrvm","||$movntdqaXrm","||packusdwXrvm",
225 "||maskmovpsXrvm","||maskmovpdXrvm","||maskmovpsXmvr","||maskmovpdXmvr",
226 --3x
227 "||pmovzxbwXrm","||pmovzxbdXrm","||pmovzxbqXrm","||pmovzxwdXrm",
228 "||pmovzxwqXrm","||pmovzxdqXrm","||permdXrvm","||pcmpgtqXrvm",
229 "||pminsbXrvm","||pminsdXrvm","||pminuwXrvm","||pminudXrvm",
230 "||pmaxsbXrvm","||pmaxsdXrvm","||pmaxuwXrvm","||pmaxudXrvm",
231 --4x
232 "||pmulddXrvm","||phminposuwXrm",nil,nil,
233 nil,"||psrlvVSXrvm","||psravdXrvm","||psllvVSXrvm",
234 --5x
235 [0x58] = "||pbroadcastdXrlXm",[0x59] = "||pbroadcastqXrlXm",
236 [0x5a] = "||broadcasti128XrlXm",
237 --7x
238 [0x78] = "||pbroadcastbXrlXm",[0x79] = "||pbroadcastwXrlXm",
239 --8x
240 [0x8c] = "||pmaskmovXrvVSm",
241 [0x8e] = "||pmaskmovVSmXvr",
242 --9x
243 [0x96] = "||fmaddsub132pHXrvm",[0x97] = "||fmsubadd132pHXrvm",
244 [0x98] = "||fmadd132pHXrvm",[0x99] = "||fmadd132sHXrvm",
245 [0x9a] = "||fmsub132pHXrvm",[0x9b] = "||fmsub132sHXrvm",
246 [0x9c] = "||fnmadd132pHXrvm",[0x9d] = "||fnmadd132sHXrvm",
247 [0x9e] = "||fnmsub132pHXrvm",[0x9f] = "||fnmsub132sHXrvm",
248 --Ax
249 [0xa6] = "||fmaddsub213pHXrvm",[0xa7] = "||fmsubadd213pHXrvm",
250 [0xa8] = "||fmadd213pHXrvm",[0xa9] = "||fmadd213sHXrvm",
251 [0xaa] = "||fmsub213pHXrvm",[0xab] = "||fmsub213sHXrvm",
252 [0xac] = "||fnmadd213pHXrvm",[0xad] = "||fnmadd213sHXrvm",
253 [0xae] = "||fnmsub213pHXrvm",[0xaf] = "||fnmsub213sHXrvm",
254 --Bx
255 [0xb6] = "||fmaddsub231pHXrvm",[0xb7] = "||fmsubadd231pHXrvm",
256 [0xb8] = "||fmadd231pHXrvm",[0xb9] = "||fmadd231sHXrvm",
257 [0xba] = "||fmsub231pHXrvm",[0xbb] = "||fmsub231sHXrvm",
258 [0xbc] = "||fnmadd231pHXrvm",[0xbd] = "||fnmadd231sHXrvm",
259 [0xbe] = "||fnmsub231pHXrvm",[0xbf] = "||fnmsub231sHXrvm",
260 --Dx
261 [0xdc] = "||aesencXrvm", [0xdd] = "||aesenclastXrvm",
262 [0xde] = "||aesdecXrvm", [0xdf] = "||aesdeclastXrvm",
263 --Fx
264 [0xf0] = "|||crc32TrBmt",[0xf1] = "|||crc32TrVmt",
265 [0xf7] = "| sarxVrmv| shlxVrmv| shrxVrmv",
266 },
267
268 ["3a"] = { -- [66] 0f 3a xx
269 --0x
270 [0x00]="||permqXrmu","||permpdXrmu","||pblenddXrvmu",nil,
271 "||permilpsXrmu","||permilpdXrmu","||perm2f128Xrvmu",nil,
272 "||roundpsXrmu","||roundpdXrmu","||roundssXrvmu","||roundsdXrvmu",
273 "||blendpsXrvmu","||blendpdXrvmu","||pblendwXrvmu","palignrPrvmu",
274 --1x
275 nil,nil,nil,nil,
276 "||pextrbVmXru","||pextrwVmXru","||pextrVmSXru","||extractpsVmXru",
277 "||insertf128XrvlXmu","||extractf128XlXmYru",nil,nil,
278 nil,nil,nil,nil,
279 --2x
280 "||pinsrbXrvVmu","||insertpsXrvmu","||pinsrXrvVmuS",nil,
281 --3x
282 [0x38] = "||inserti128Xrvmu",[0x39] = "||extracti128XlXmYru",
283 --4x
284 [0x40] = "||dppsXrvmu",
285 [0x41] = "||dppdXrvmu",
286 [0x42] = "||mpsadbwXrvmu",
287 [0x44] = "||pclmulqdqXrvmu",
288 [0x46] = "||perm2i128Xrvmu",
289 [0x4a] = "||blendvpsXrvmb",[0x4b] = "||blendvpdXrvmb",
290 [0x4c] = "||pblendvbXrvmb",
291 --6x
292 [0x60] = "||pcmpestrmXrmu",[0x61] = "||pcmpestriXrmu",
293 [0x62] = "||pcmpistrmXrmu",[0x63] = "||pcmpistriXrmu",
294 [0xdf] = "||aeskeygenassistXrmu",
295 --Fx
296 [0xf0] = "||| rorxVrmu",
297 },
298 }
299
300 -- Map for VMX/SVM opcodes 0F 01 C0-FF (sgdt group with register operands).
301 local map_opcvm = {
302 [0xc1]="vmcall",[0xc2]="vmlaunch",[0xc3]="vmresume",[0xc4]="vmxoff",
303 [0xc8]="monitor",[0xc9]="mwait",
304 [0xd8]="vmrun",[0xd9]="vmmcall",[0xda]="vmload",[0xdb]="vmsave",
305 [0xdc]="stgi",[0xdd]="clgi",[0xde]="skinit",[0xdf]="invlpga",
306 [0xf8]="swapgs",[0xf9]="rdtscp",
307 }
308
309 -- Map for FP opcodes. And you thought stack machines are simple?
310 local map_opcfp = {
311 -- D8-DF 00-BF: opcodes with a memory operand.
312 -- D8
313 [0]="faddFm","fmulFm","fcomFm","fcompFm","fsubFm","fsubrFm","fdivFm","fdivrFm",
314 "fldFm",nil,"fstFm","fstpFm","fldenvVm","fldcwWm","fnstenvVm","fnstcwWm",
315 -- DA
316 "fiaddDm","fimulDm","ficomDm","ficompDm",
317 "fisubDm","fisubrDm","fidivDm","fidivrDm",
318 -- DB
319 "fildDm","fisttpDm","fistDm","fistpDm",nil,"fld twordFmp",nil,"fstp twordFmp",
320 -- DC
321 "faddGm","fmulGm","fcomGm","fcompGm","fsubGm","fsubrGm","fdivGm","fdivrGm",
322 -- DD
323 "fldGm","fisttpQm","fstGm","fstpGm","frstorDmp",nil,"fnsaveDmp","fnstswWm",
324 -- DE
325 "fiaddWm","fimulWm","ficomWm","ficompWm",
326 "fisubWm","fisubrWm","fidivWm","fidivrWm",
327 -- DF
328 "fildWm","fisttpWm","fistWm","fistpWm",
329 "fbld twordFmp","fildQm","fbstp twordFmp","fistpQm",
330 -- xx C0-FF: opcodes with a pseudo-register operand.
331 -- D8
332 "faddFf","fmulFf","fcomFf","fcompFf","fsubFf","fsubrFf","fdivFf","fdivrFf",
333 -- D9
334 "fldFf","fxchFf",{"fnop"},nil,
335 {"fchs","fabs",nil,nil,"ftst","fxam"},
336 {"fld1","fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz"},
337 {"f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp","fincstp"},
338 {"fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"},
339 -- DA
340 "fcmovbFf","fcmoveFf","fcmovbeFf","fcmovuFf",nil,{nil,"fucompp"},nil,nil,
341 -- DB
342 "fcmovnbFf","fcmovneFf","fcmovnbeFf","fcmovnuFf",
343 {nil,nil,"fnclex","fninit"},"fucomiFf","fcomiFf",nil,
344 -- DC
345 "fadd toFf","fmul toFf",nil,nil,
346 "fsub toFf","fsubr toFf","fdivr toFf","fdiv toFf",
347 -- DD
348 "ffreeFf",nil,"fstFf","fstpFf","fucomFf","fucompFf",nil,nil,
349 -- DE
350 "faddpFf","fmulpFf",nil,{nil,"fcompp"},
351 "fsubrpFf","fsubpFf","fdivrpFf","fdivpFf",
352 -- DF
353 nil,nil,nil,nil,{"fnstsw ax"},"fucomipFf","fcomipFf",nil,
354 }
355 assert(map_opcfp[126] == "fcomipFf")
356
357 -- Map for opcode groups. The subkey is sp from the ModRM byte.
358 local map_opcgroup = {
359 arith = { "add", "or", "adc", "sbb", "and", "sub", "xor", "cmp" },
360 shift = { "rol", "ror", "rcl", "rcr", "shl", "shr", "sal", "sar" },
361 testb = { "testBmi", "testBmi", "not", "neg", "mul", "imul", "div", "idiv" },
362 testv = { "testVmi", "testVmi", "not", "neg", "mul", "imul", "div", "idiv" },
363 incb = { "inc", "dec" },
364 incd = { "inc", "dec", "callUmp", "$call farDmp",
365 "jmpUmp", "$jmp farDmp", "pushUm" },
366 sldt = { "sldt", "str", "lldt", "ltr", "verr", "verw" },
367 sgdt = { "vm*$sgdt", "vm*$sidt", "$lgdt", "vm*$lidt",
368 "smsw", nil, "lmsw", "vm*$invlpg" },
369 bt = { nil, nil, nil, nil, "bt", "bts", "btr", "btc" },
370 cmpxchg = { nil, "sz*,cmpxchg8bQmp,cmpxchg16bXmp", nil, nil,
371 nil, nil, "vmptrld|vmxon|vmclear", "vmptrst" },
372 pshiftw = { nil, nil, "psrlw", nil, "psraw", nil, "psllw" },
373 pshiftd = { nil, nil, "psrld", nil, "psrad", nil, "pslld" },
374 pshiftq = { nil, nil, "psrlq", nil, nil, nil, "psllq" },
375 pshiftdq = { nil, nil, "psrlq", "psrldq", nil, nil, "psllq", "pslldq" },
376 fxsave = { "$fxsave", "$fxrstor", "$ldmxcsr", "$stmxcsr",
377 nil, "lfenceDp$", "mfenceDp$", "sfenceDp$clflush" },
378 prefetch = { "prefetch", "prefetchw" },
379 prefetcht = { "prefetchnta", "prefetcht0", "prefetcht1", "prefetcht2" },
380 }
381
382 ------------------------------------------------------------------------------
383
384 -- Maps for register names.
385 local map_regs = {
386 B = { "al", "cl", "dl", "bl", "ah", "ch", "dh", "bh",
387 "r8b", "r9b", "r10b", "r11b", "r12b", "r13b", "r14b", "r15b" },
388 B64 = { "al", "cl", "dl", "bl", "spl", "bpl", "sil", "dil",
389 "r8b", "r9b", "r10b", "r11b", "r12b", "r13b", "r14b", "r15b" },
390 W = { "ax", "cx", "dx", "bx", "sp", "bp", "si", "di",
391 "r8w", "r9w", "r10w", "r11w", "r12w", "r13w", "r14w", "r15w" },
392 D = { "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi",
393 "r8d", "r9d", "r10d", "r11d", "r12d", "r13d", "r14d", "r15d" },
394 Q = { "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
395 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" },
396 M = { "mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7",
397 "mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7" }, -- No x64 ext!
398 X = { "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7",
399 "xmm8", "xmm9", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15" },
400 Y = { "ymm0", "ymm1", "ymm2", "ymm3", "ymm4", "ymm5", "ymm6", "ymm7",
401 "ymm8", "ymm9", "ymm10", "ymm11", "ymm12", "ymm13", "ymm14", "ymm15" },
402 }
403 local map_segregs = { "es", "cs", "ss", "ds", "fs", "gs", "segr6", "segr7" }
404
405 -- Maps for size names.
406 local map_sz2n = {
407 B = 1, W = 2, D = 4, Q = 8, M = 8, X = 16, Y = 32,
408 }
409 local map_sz2prefix = {
410 B = "byte", W = "word", D = "dword",
411 Q = "qword",
412 M = "qword", X = "xword", Y = "yword",
413 F = "dword", G = "qword", -- No need for sizes/register names for these two.
414 }
415
416 ------------------------------------------------------------------------------
417
418 -- Output a nicely formatted line with an opcode and operands.
419 local function putop(ctx, text, operands)
420 local code, pos, hex = ctx.code, ctx.pos, ""
421 local hmax = ctx.hexdump
422 if hmax > 0 then
423 for i=ctx.start,pos-1 do
424 hex = hex..format("%02X", byte(code, i, i))
425 end
426 if #hex > hmax then hex = sub(hex, 1, hmax)..". "
427 else hex = hex..rep(" ", hmax-#hex+2) end
428 end
429 if operands then text = text.." "..operands end
430 if ctx.o16 then text = "o16 "..text; ctx.o16 = false end
431 if ctx.a32 then text = "a32 "..text; ctx.a32 = false end
432 if ctx.rep then text = ctx.rep.." "..text; ctx.rep = false end
433 if ctx.rex then
434 local t = (ctx.rexw and "w" or "")..(ctx.rexr and "r" or "")..
435 (ctx.rexx and "x" or "")..(ctx.rexb and "b" or "")..
436 (ctx.vexl and "l" or "")
437 if ctx.vexv and ctx.vexv ~= 0 then t = t.."v"..ctx.vexv end
438 if t ~= "" then text = ctx.rex.."."..t.." "..gsub(text, "^ ", "")
439 elseif ctx.rex == "vex" then text = gsub("v"..text, "^v ", "") end
440 ctx.rexw = false; ctx.rexr = false; ctx.rexx = false; ctx.rexb = false
441 ctx.rex = false; ctx.vexl = false; ctx.vexv = false
442 end
443 if ctx.seg then
444 local text2, n = gsub(text, "%[", "["..ctx.seg..":")
445 if n == 0 then text = ctx.seg.." "..text else text = text2 end
446 ctx.seg = false
447 end
448 if ctx.lock then text = "lock "..text; ctx.lock = false end
449 local imm = ctx.imm
450 if imm then
451 local sym = ctx.symtab[imm]
452 if sym then text = text.."\t->"..sym end
453 end
454 ctx.out(format("%08x %s%s\n", ctx.addr+ctx.start, hex, text))
455 ctx.mrm = false
456 ctx.vexv = false
457 ctx.start = pos
458 ctx.imm = nil
459 end
460
461 -- Clear all prefix flags.
462 local function clearprefixes(ctx)
463 ctx.o16 = false; ctx.seg = false; ctx.lock = false; ctx.rep = false
464 ctx.rexw = false; ctx.rexr = false; ctx.rexx = false; ctx.rexb = false
465 ctx.rex = false; ctx.a32 = false; ctx.vexl = false
466 end
467
468 -- Fallback for incomplete opcodes at the end.
469 local function incomplete(ctx)
470 ctx.pos = ctx.stop+1
471 clearprefixes(ctx)
472 return putop(ctx, "(incomplete)")
473 end
474
475 -- Fallback for unknown opcodes.
476 local function unknown(ctx)
477 clearprefixes(ctx)
478 return putop(ctx, "(unknown)")
479 end
480
481 -- Return an immediate of the specified size.
482 local function getimm(ctx, pos, n)
483 if pos+n-1 > ctx.stop then return incomplete(ctx) end
484 local code = ctx.code
485 if n == 1 then
486 local b1 = byte(code, pos, pos)
487 return b1
488 elseif n == 2 then
489 local b1, b2 = byte(code, pos, pos+1)
490 return b1+b2*256
491 else
492 local b1, b2, b3, b4 = byte(code, pos, pos+3)
493 local imm = b1+b2*256+b3*65536+b4*16777216
494 ctx.imm = imm
495 return imm
496 end
497 end
498
499 -- Process pattern string and generate the operands.
500 local function putpat(ctx, name, pat)
501 local operands, regs, sz, mode, sp, rm, sc, rx, sdisp
502 local code, pos, stop, vexl = ctx.code, ctx.pos, ctx.stop, ctx.vexl
503
504 -- Chars used: 1DFGHIMPQRSTUVWXYabcdfgijlmoprstuvwxyz
505 for p in gmatch(pat, ".") do
506 local x = nil
507 if p == "V" or p == "U" then
508 if ctx.rexw then sz = "Q"; ctx.rexw = false
509 elseif ctx.o16 then sz = "W"; ctx.o16 = false
510 elseif p == "U" and ctx.x64 then sz = "Q"
511 else sz = "D" end
512 regs = map_regs[sz]
513 elseif p == "T" then
514 if ctx.rexw then sz = "Q"; ctx.rexw = false else sz = "D" end
515 regs = map_regs[sz]
516 elseif p == "B" then
517 sz = "B"
518 regs = ctx.rex and map_regs.B64 or map_regs.B
519 elseif match(p, "[WDQMXYFG]") then
520 sz = p
521 if sz == "X" and vexl then sz = "Y"; ctx.vexl = false end
522 regs = map_regs[sz]
523 elseif p == "P" then
524 sz = ctx.o16 and "X" or "M"; ctx.o16 = false
525 if sz == "X" and vexl then sz = "Y"; ctx.vexl = false end
526 regs = map_regs[sz]
527 elseif p == "H" then
528 name = name..(ctx.rexw and "d" or "s")
529 ctx.rexw = false
530 elseif p == "S" then
531 name = name..lower(sz)
532 elseif p == "s" then
533 local imm = getimm(ctx, pos, 1); if not imm then return end
534 x = imm <= 127 and format("+0x%02x", imm)
535 or format("-0x%02x", 256-imm)
536 pos = pos+1
537 elseif p == "u" then
538 local imm = getimm(ctx, pos, 1); if not imm then return end
539 x = format("0x%02x", imm)
540 pos = pos+1
541 elseif p == "b" then
542 local imm = getimm(ctx, pos, 1); if not imm then return end
543 x = regs[imm/16+1]
544 pos = pos+1
545 elseif p == "w" then
546 local imm = getimm(ctx, pos, 2); if not imm then return end
547 x = format("0x%x", imm)
548 pos = pos+2
549 elseif p == "o" then -- [offset]
550 if ctx.x64 then
551 local imm1 = getimm(ctx, pos, 4); if not imm1 then return end
552 local imm2 = getimm(ctx, pos+4, 4); if not imm2 then return end
553 x = format("[0x%08x%08x]", imm2, imm1)
554 pos = pos+8
555 else
556 local imm = getimm(ctx, pos, 4); if not imm then return end
557 x = format("[0x%08x]", imm)
558 pos = pos+4
559 end
560 elseif p == "i" or p == "I" then
561 local n = map_sz2n[sz]
562 if n == 8 and ctx.x64 and p == "I" then
563 local imm1 = getimm(ctx, pos, 4); if not imm1 then return end
564 local imm2 = getimm(ctx, pos+4, 4); if not imm2 then return end
565 x = format("0x%08x%08x", imm2, imm1)
566 else
567 if n == 8 then n = 4 end
568 local imm = getimm(ctx, pos, n); if not imm then return end
569 if sz == "Q" and (imm < 0 or imm > 0x7fffffff) then
570 imm = (0xffffffff+1)-imm
571 x = format(imm > 65535 and "-0x%08x" or "-0x%x", imm)
572 else
573 x = format(imm > 65535 and "0x%08x" or "0x%x", imm)
574 end
575 end
576 pos = pos+n
577 elseif p == "j" then
578 local n = map_sz2n[sz]
579 if n == 8 then n = 4 end
580 local imm = getimm(ctx, pos, n); if not imm then return end
581 if sz == "B" and imm > 127 then imm = imm-256
582 elseif imm > 2147483647 then imm = imm-4294967296 end
583 pos = pos+n
584 imm = imm + pos + ctx.addr
585 if imm > 4294967295 and not ctx.x64 then imm = imm-4294967296 end
586 ctx.imm = imm
587 if sz == "W" then
588 x = format("word 0x%04x", imm%65536)
589 elseif ctx.x64 then
590 local lo = imm % 0x1000000
591 x = format("0x%02x%06x", (imm-lo) / 0x1000000, lo)
592 else
593 x = "0x"..tohex(imm)
594 end
595 elseif p == "R" then
596 local r = byte(code, pos-1, pos-1)%8
597 if ctx.rexb then r = r + 8; ctx.rexb = false end
598 x = regs[r+1]
599 elseif p == "a" then x = regs[1]
600 elseif p == "c" then x = "cl"
601 elseif p == "d" then x = "dx"
602 elseif p == "1" then x = "1"
603 else
604 if not mode then
605 mode = ctx.mrm
606 if not mode then
607 if pos > stop then return incomplete(ctx) end
608 mode = byte(code, pos, pos)
609 pos = pos+1
610 end
611 rm = mode%8; mode = (mode-rm)/8
612 sp = mode%8; mode = (mode-sp)/8
613 sdisp = ""
614 if mode < 3 then
615 if rm == 4 then
616 if pos > stop then return incomplete(ctx) end
617 sc = byte(code, pos, pos)
618 pos = pos+1
619 rm = sc%8; sc = (sc-rm)/8
620 rx = sc%8; sc = (sc-rx)/8
621 if ctx.rexx then rx = rx + 8; ctx.rexx = false end
622 if rx == 4 then rx = nil end
623 end
624 if mode > 0 or rm == 5 then
625 local dsz = mode
626 if dsz ~= 1 then dsz = 4 end
627 local disp = getimm(ctx, pos, dsz); if not disp then return end
628 if mode == 0 then rm = nil end
629 if rm or rx or (not sc and ctx.x64 and not ctx.a32) then
630 if dsz == 1 and disp > 127 then
631 sdisp = format("-0x%x", 256-disp)
632 elseif disp >= 0 and disp <= 0x7fffffff then
633 sdisp = format("+0x%x", disp)
634 else
635 sdisp = format("-0x%x", (0xffffffff+1)-disp)
636 end
637 else
638 sdisp = format(ctx.x64 and not ctx.a32 and
639 not (disp >= 0 and disp <= 0x7fffffff)
640 and "0xffffffff%08x" or "0x%08x", disp)
641 end
642 pos = pos+dsz
643 end
644 end
645 if rm and ctx.rexb then rm = rm + 8; ctx.rexb = false end
646 if ctx.rexr then sp = sp + 8; ctx.rexr = false end
647 end
648 if p == "m" then
649 if mode == 3 then x = regs[rm+1]
650 else
651 local aregs = ctx.a32 and map_regs.D or ctx.aregs
652 local srm, srx = "", ""
653 if rm then srm = aregs[rm+1]
654 elseif not sc and ctx.x64 and not ctx.a32 then srm = "rip" end
655 ctx.a32 = false
656 if rx then
657 if rm then srm = srm.."+" end
658 srx = aregs[rx+1]
659 if sc > 0 then srx = srx.."*"..(2^sc) end
660 end
661 x = format("[%s%s%s]", srm, srx, sdisp)
662 end
663 if mode < 3 and
664 (not match(pat, "[aRrgp]") or match(pat, "t")) then -- Yuck.
665 x = map_sz2prefix[sz].." "..x
666 end
667 elseif p == "r" then x = regs[sp+1]
668 elseif p == "g" then x = map_segregs[sp+1]
669 elseif p == "p" then -- Suppress prefix.
670 elseif p == "f" then x = "st"..rm
671 elseif p == "x" then
672 if sp == 0 and ctx.lock and not ctx.x64 then
673 x = "CR8"; ctx.lock = false
674 else
675 x = "CR"..sp
676 end
677 elseif p == "v" then
678 if ctx.vexv then
679 x = regs[ctx.vexv+1]; ctx.vexv = false
680 end
681 elseif p == "y" then x = "DR"..sp
682 elseif p == "z" then x = "TR"..sp
683 elseif p == "l" then vexl = false
684 elseif p == "t" then
685 else
686 error("bad pattern `"..pat.."'")
687 end
688 end
689 if x then operands = operands and operands..", "..x or x end
690 end
691 ctx.pos = pos
692 return putop(ctx, name, operands)
693 end
694
695 -- Forward declaration.
696 local map_act
697
698 -- Fetch and cache MRM byte.
699 local function getmrm(ctx)
700 local mrm = ctx.mrm
701 if not mrm then
702 local pos = ctx.pos
703 if pos > ctx.stop then return nil end
704 mrm = byte(ctx.code, pos, pos)
705 ctx.pos = pos+1
706 ctx.mrm = mrm
707 end
708 return mrm
709 end
710
711 -- Dispatch to handler depending on pattern.
712 local function dispatch(ctx, opat, patgrp)
713 if not opat then return unknown(ctx) end
714 if match(opat, "%|") then -- MMX/SSE variants depending on prefix.
715 local p
716 if ctx.rep then
717 p = ctx.rep=="rep" and "%|([^%|]*)" or "%|[^%|]*%|[^%|]*%|([^%|]*)"
718 ctx.rep = false
719 elseif ctx.o16 then p = "%|[^%|]*%|([^%|]*)"; ctx.o16 = false
720 else p = "^[^%|]*" end
721 opat = match(opat, p)
722 if not opat then return unknown(ctx) end
723 -- ctx.rep = false; ctx.o16 = false
724 --XXX fails for 66 f2 0f 38 f1 06 crc32 eax,WORD PTR [esi]
725 --XXX remove in branches?
726 end
727 if match(opat, "%$") then -- reg$mem variants.
728 local mrm = getmrm(ctx); if not mrm then return incomplete(ctx) end
729 opat = match(opat, mrm >= 192 and "^[^%$]*" or "%$(.*)")
730 if opat == "" then return unknown(ctx) end
731 end
732 if opat == "" then return unknown(ctx) end
733 local name, pat = match(opat, "^([a-z0-9 ]*)(.*)")
734 if pat == "" and patgrp then pat = patgrp end
735 return map_act[sub(pat, 1, 1)](ctx, name, pat)
736 end
737
738 -- Get a pattern from an opcode map and dispatch to handler.
739 local function dispatchmap(ctx, opcmap)
740 local pos = ctx.pos
741 local opat = opcmap[byte(ctx.code, pos, pos)]
742 pos = pos + 1
743 ctx.pos = pos
744 return dispatch(ctx, opat)
745 end
746
747 -- Map for action codes. The key is the first char after the name.
748 map_act = {
749 -- Simple opcodes without operands.
750 [""] = function(ctx, name, pat)
751 return putop(ctx, name)
752 end,
753
754 -- Operand size chars fall right through.
755 B = putpat, W = putpat, D = putpat, Q = putpat,
756 V = putpat, U = putpat, T = putpat,
757 M = putpat, X = putpat, P = putpat,
758 F = putpat, G = putpat, Y = putpat,
759 H = putpat,
760
761 -- Collect prefixes.
762 [":"] = function(ctx, name, pat)
763 ctx[pat == ":" and name or sub(pat, 2)] = name
764 if ctx.pos - ctx.start > 5 then return unknown(ctx) end -- Limit #prefixes.
765 end,
766
767 -- Chain to special handler specified by name.
768 ["*"] = function(ctx, name, pat)
769 return map_act[name](ctx, name, sub(pat, 2))
770 end,
771
772 -- Use named subtable for opcode group.
773 ["!"] = function(ctx, name, pat)
774 local mrm = getmrm(ctx); if not mrm then return incomplete(ctx) end
775 return dispatch(ctx, map_opcgroup[name][((mrm-(mrm%8))/8)%8+1], sub(pat, 2))
776 end,
777
778 -- o16,o32[,o64] variants.
779 sz = function(ctx, name, pat)
780 if ctx.o16 then ctx.o16 = false
781 else
782 pat = match(pat, ",(.*)")
783 if ctx.rexw then
784 local p = match(pat, ",(.*)")
785 if p then pat = p; ctx.rexw = false end
786 end
787 end
788 pat = match(pat, "^[^,]*")
789 return dispatch(ctx, pat)
790 end,
791
792 -- Two-byte opcode dispatch.
793 opc2 = function(ctx, name, pat)
794 return dispatchmap(ctx, map_opc2)
795 end,
796
797 -- Three-byte opcode dispatch.
798 opc3 = function(ctx, name, pat)
799 return dispatchmap(ctx, map_opc3[pat])
800 end,
801
802 -- VMX/SVM dispatch.
803 vm = function(ctx, name, pat)
804 return dispatch(ctx, map_opcvm[ctx.mrm])
805 end,
806
807 -- Floating point opcode dispatch.
808 fp = function(ctx, name, pat)
809 local mrm = getmrm(ctx); if not mrm then return incomplete(ctx) end
810 local rm = mrm%8
811 local idx = pat*8 + ((mrm-rm)/8)%8
812 if mrm >= 192 then idx = idx + 64 end
813 local opat = map_opcfp[idx]
814 if type(opat) == "table" then opat = opat[rm+1] end
815 return dispatch(ctx, opat)
816 end,
817
818 -- REX prefix.
819 rex = function(ctx, name, pat)
820 if ctx.rex then return unknown(ctx) end -- Only 1 REX or VEX prefix allowed.
821 for p in gmatch(pat, ".") do ctx["rex"..p] = true end
822 ctx.rex = "rex"
823 end,
824
825 -- VEX prefix.
826 vex = function(ctx, name, pat)
827 if ctx.rex then return unknown(ctx) end -- Only 1 REX or VEX prefix allowed.
828 ctx.rex = "vex"
829 local pos = ctx.pos
830 if ctx.mrm then
831 ctx.mrm = nil
832 pos = pos-1
833 end
834 local b = byte(ctx.code, pos, pos)
835 if not b then return incomplete(ctx) end
836 pos = pos+1
837 if b < 128 then ctx.rexr = true end
838 local m = 1
839 if pat == "3" then
840 m = b%32; b = (b-m)/32
841 local nb = b%2; b = (b-nb)/2
842 if nb == 0 then ctx.rexb = true end
843 local nx = b%2
844 if nx == 0 then ctx.rexx = true end
845 b = byte(ctx.code, pos, pos)
846 if not b then return incomplete(ctx) end
847 pos = pos+1
848 if b >= 128 then ctx.rexw = true end
849 end
850 ctx.pos = pos
851 local map
852 if m == 1 then map = map_opc2
853 elseif m == 2 then map = map_opc3["38"]
854 elseif m == 3 then map = map_opc3["3a"]
855 else return unknown(ctx) end
856 local p = b%4; b = (b-p)/4
857 if p == 1 then ctx.o16 = "o16"
858 elseif p == 2 then ctx.rep = "rep"
859 elseif p == 3 then ctx.rep = "repne" end
860 local l = b%2; b = (b-l)/2
861 if l ~= 0 then ctx.vexl = true end
862 ctx.vexv = (-1-b)%16
863 return dispatchmap(ctx, map)
864 end,
865
866 -- Special case for nop with REX prefix.
867 nop = function(ctx, name, pat)
868 return dispatch(ctx, ctx.rex and pat or "nop")
869 end,
870
871 -- Special case for 0F 77.
872 emms = function(ctx, name, pat)
873 if ctx.rex ~= "vex" then
874 return putop(ctx, "emms")
875 elseif ctx.vexl then
876 ctx.vexl = false
877 return putop(ctx, "zeroall")
878 else
879 return putop(ctx, "zeroupper")
880 end
881 end,
882 }
883
884 ------------------------------------------------------------------------------
885
886 -- Disassemble a block of code.
887 local function disass_block(ctx, ofs, len)
888 if not ofs then ofs = 0 end
889 local stop = len and ofs+len or #ctx.code
890 ofs = ofs + 1
891 ctx.start = ofs
892 ctx.pos = ofs
893 ctx.stop = stop
894 ctx.imm = nil
895 ctx.mrm = false
896 clearprefixes(ctx)
897 while ctx.pos <= stop do dispatchmap(ctx, ctx.map1) end
898 if ctx.pos ~= ctx.start then incomplete(ctx) end
899 end
900
901 -- Extended API: create a disassembler context. Then call ctx:disass(ofs, len).
902 local function create(code, addr, out)
903 local ctx = {}
904 ctx.code = code
905 ctx.addr = (addr or 0) - 1
906 ctx.out = out or io.write
907 ctx.symtab = {}
908 ctx.disass = disass_block
909 ctx.hexdump = 16
910 ctx.x64 = false
911 ctx.map1 = map_opc1_32
912 ctx.aregs = map_regs.D
913 return ctx
914 end
915
916 local function create64(code, addr, out)
917 local ctx = create(code, addr, out)
918 ctx.x64 = true
919 ctx.map1 = map_opc1_64
920 ctx.aregs = map_regs.Q
921 return ctx
922 end
923
924 -- Simple API: disassemble code (a string) at address and output via out.
925 local function disass(code, addr, out)
926 create(code, addr, out):disass()
927 end
928
929 local function disass64(code, addr, out)
930 create64(code, addr, out):disass()
931 end
932
933 -- Return register name for RID.
934 local function regname(r)
935 if r < 8 then return map_regs.D[r+1] end
936 return map_regs.X[r-7]
937 end
938
939 local function regname64(r)
940 if r < 16 then return map_regs.Q[r+1] end
941 return map_regs.X[r-15]
942 end
943
944 -- Public module functions.
945 return {
946 create = create,
947 create64 = create64,
948 disass = disass,
949 disass64 = disass64,
950 regname = regname,
951 regname64 = regname64
952 }
953