DisasmFormatYasm.cpp@ 30855

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1	/* $Id: DisasmFormatYasm.cpp 28800 2010-04-27 08:22:32Z vboxsync $ */
2	/** @file
3	* VBox Disassembler - Yasm(/Nasm) Style Formatter.
4	*/
5
6	/*
7	* Copyright (C) 2008 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#include <VBox/dis.h>
23	#include "DisasmInternal.h"
24	#include <iprt/string.h>
25	#include <iprt/assert.h>
26	#include <iprt/ctype.h>
27
28
29	/*******************************************************************************
30	* Global Variables *
31	*******************************************************************************/
32	static const char g_szSpaces[] =
33	" ";
34	static const char g_aszYasmRegGen8[20][5] =
35	{
36	"al\0\0", "cl\0\0", "dl\0\0", "bl\0\0", "ah\0\0", "ch\0\0", "dh\0\0", "bh\0\0", "r8b\0", "r9b\0", "r10b", "r11b", "r12b", "r13b", "r14b", "r15b", "spl\0", "bpl\0", "sil\0", "dil\0"
37	};
38	static const char g_aszYasmRegGen16[16][5] =
39	{
40	"ax\0\0", "cx\0\0", "dx\0\0", "bx\0\0", "sp\0\0", "bp\0\0", "si\0\0", "di\0\0", "r8w\0", "r9w\0", "r10w", "r11w", "r12w", "r13w", "r14w", "r15w"
41	};
42	static const char g_aszYasmRegGen1616[8][6] =
43	{
44	"bx+si", "bx+di", "bp+si", "bp+di", "si\0\0\0", "di\0\0\0", "bp\0\0\0", "bx\0\0\0"
45	};
46	static const char g_aszYasmRegGen32[16][5] =
47	{
48	"eax\0", "ecx\0", "edx\0", "ebx\0", "esp\0", "ebp\0", "esi\0", "edi\0", "r8d\0", "r9d\0", "r10d", "r11d", "r12d", "r13d", "r14d", "r15d"
49	};
50	static const char g_aszYasmRegGen64[16][4] =
51	{
52	"rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi", "r8\0", "r9\0", "r10", "r11", "r12", "r13", "r14", "r15"
53	};
54	static const char g_aszYasmRegSeg[6][3] =
55	{
56	"es", "cs", "ss", "ds", "fs", "gs"
57	};
58	static const char g_aszYasmRegFP[8][4] =
59	{
60	"st0", "st1", "st2", "st3", "st4", "st5", "st6", "st7"
61	};
62	static const char g_aszYasmRegMMX[8][4] =
63	{
64	"mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7"
65	};
66	static const char g_aszYasmRegXMM[16][6] =
67	{
68	"xmm0\0", "xmm1\0", "xmm2\0", "xmm3\0", "xmm4\0", "xmm5\0", "xmm6\0", "xmm7\0", "xmm8\0", "xmm9\0", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15"
69	};
70	static const char g_aszYasmRegCRx[16][5] =
71	{
72	"cr0\0", "cr1\0", "cr2\0", "cr3\0", "cr4\0", "cr5\0", "cr6\0", "cr7\0", "cr8\0", "cr9\0", "cr10", "cr11", "cr12", "cr13", "cr14", "cr15"
73	};
74	static const char g_aszYasmRegDRx[16][5] =
75	{
76	"dr0\0", "dr1\0", "dr2\0", "dr3\0", "dr4\0", "dr5\0", "dr6\0", "dr7\0", "dr8\0", "dr9\0", "dr10", "dr11", "dr12", "dr13", "dr14", "dr15"
77	};
78	static const char g_aszYasmRegTRx[16][5] =
79	{
80	"tr0\0", "tr1\0", "tr2\0", "tr3\0", "tr4\0", "tr5\0", "tr6\0", "tr7\0", "tr8\0", "tr9\0", "tr10", "tr11", "tr12", "tr13", "tr14", "tr15"
81	};
82
83
84
85	/**
86	* Gets the base register name for the given parameter.
87	*
88	* @returns Pointer to the register name.
89	* @param pCpu The disassembler cpu state.
90	* @param pParam The parameter.
91	* @param pcchReg Where to store the length of the name.
92	*/
93	static const char disasmFormatYasmBaseReg(PCDISCPUSTATE pCpu, PCOP_PARAMETER pParam, size_t pcchReg)
94	{
95	switch (pParam->flags & ( USE_REG_GEN8 \| USE_REG_GEN16 \| USE_REG_GEN32 \| USE_REG_GEN64
96	\| USE_REG_FP \| USE_REG_MMX \| USE_REG_XMM \| USE_REG_CR
97	\| USE_REG_DBG \| USE_REG_SEG \| USE_REG_TEST))
98
99	{
100	case USE_REG_GEN8:
101	{
102	Assert(pParam->base.reg_gen < RT_ELEMENTS(g_aszYasmRegGen8));
103	const char *psz = g_aszYasmRegGen8[pParam->base.reg_gen];
104	*pcchReg = 2 + !!psz[2] + !!psz[3];
105	return psz;
106	}
107
108	case USE_REG_GEN16:
109	{
110	Assert(pParam->base.reg_gen < RT_ELEMENTS(g_aszYasmRegGen16));
111	const char *psz = g_aszYasmRegGen16[pParam->base.reg_gen];
112	*pcchReg = 2 + !!psz[2] + !!psz[3];
113	return psz;
114	}
115
116	case USE_REG_GEN32:
117	{
118	Assert(pParam->base.reg_gen < RT_ELEMENTS(g_aszYasmRegGen32));
119	const char *psz = g_aszYasmRegGen32[pParam->base.reg_gen];
120	*pcchReg = 2 + !!psz[2] + !!psz[3];
121	return psz;
122	}
123
124	case USE_REG_GEN64:
125	{
126	Assert(pParam->base.reg_gen < RT_ELEMENTS(g_aszYasmRegGen64));
127	const char *psz = g_aszYasmRegGen64[pParam->base.reg_gen];
128	*pcchReg = 2 + !!psz[2] + !!psz[3];
129	return psz;
130	}
131
132	case USE_REG_FP:
133	{
134	Assert(pParam->base.reg_fp < RT_ELEMENTS(g_aszYasmRegFP));
135	const char *psz = g_aszYasmRegFP[pParam->base.reg_fp];
136	*pcchReg = 3;
137	return psz;
138	}
139
140	case USE_REG_MMX:
141	{
142	Assert(pParam->base.reg_mmx < RT_ELEMENTS(g_aszYasmRegMMX));
143	const char *psz = g_aszYasmRegMMX[pParam->base.reg_mmx];
144	*pcchReg = 3;
145	return psz;
146	}
147
148	case USE_REG_XMM:
149	{
150	Assert(pParam->base.reg_xmm < RT_ELEMENTS(g_aszYasmRegXMM));
151	const char *psz = g_aszYasmRegXMM[pParam->base.reg_mmx];
152	*pcchReg = 4 + !!psz[4];
153	return psz;
154	}
155
156	case USE_REG_CR:
157	{
158	Assert(pParam->base.reg_ctrl < RT_ELEMENTS(g_aszYasmRegCRx));
159	const char *psz = g_aszYasmRegCRx[pParam->base.reg_ctrl];
160	*pcchReg = 3;
161	return psz;
162	}
163
164	case USE_REG_DBG:
165	{
166	Assert(pParam->base.reg_dbg < RT_ELEMENTS(g_aszYasmRegDRx));
167	const char *psz = g_aszYasmRegDRx[pParam->base.reg_dbg];
168	*pcchReg = 3;
169	return psz;
170	}
171
172	case USE_REG_SEG:
173	{
174	Assert(pParam->base.reg_seg < (DIS_SELREG)RT_ELEMENTS(g_aszYasmRegCRx));
175	const char *psz = g_aszYasmRegSeg[pParam->base.reg_seg];
176	*pcchReg = 2;
177	return psz;
178	}
179
180	case USE_REG_TEST:
181	{
182	Assert(pParam->base.reg_test < RT_ELEMENTS(g_aszYasmRegTRx));
183	const char *psz = g_aszYasmRegTRx[pParam->base.reg_test];
184	*pcchReg = 3;
185	return psz;
186	}
187
188	default:
189	AssertMsgFailed(("%#x\n", pParam->flags));
190	*pcchReg = 3;
191	return "r??";
192	}
193	}
194
195
196	/**
197	* Gets the index register name for the given parameter.
198	*
199	* @returns The index register name.
200	* @param pCpu The disassembler cpu state.
201	* @param pParam The parameter.
202	* @param pcchReg Where to store the length of the name.
203	*/
204	static const char disasmFormatYasmIndexReg(PCDISCPUSTATE pCpu, PCOP_PARAMETER pParam, size_t pcchReg)
205	{
206	switch (pCpu->addrmode)
207	{
208	case CPUMODE_16BIT:
209	{
210	Assert(pParam->index.reg_gen < RT_ELEMENTS(g_aszYasmRegGen16));
211	const char *psz = g_aszYasmRegGen16[pParam->index.reg_gen];
212	*pcchReg = 2 + !!psz[2] + !!psz[3];
213	return psz;
214	}
215
216	case CPUMODE_32BIT:
217	{
218	Assert(pParam->index.reg_gen < RT_ELEMENTS(g_aszYasmRegGen32));
219	const char *psz = g_aszYasmRegGen32[pParam->index.reg_gen];
220	*pcchReg = 2 + !!psz[2] + !!psz[3];
221	return psz;
222	}
223
224	case CPUMODE_64BIT:
225	{
226	Assert(pParam->index.reg_gen < RT_ELEMENTS(g_aszYasmRegGen64));
227	const char *psz = g_aszYasmRegGen64[pParam->index.reg_gen];
228	*pcchReg = 2 + !!psz[2] + !!psz[3];
229	return psz;
230	}
231
232	default:
233	AssertMsgFailed(("%#x %#x\n", pParam->flags, pCpu->addrmode));
234	*pcchReg = 3;
235	return "r??";
236	}
237	}
238
239
240	/**
241	* Formats the current instruction in Yasm (/ Nasm) style.
242	*
243	*
244	* @returns The number of output characters. If this is >= cchBuf, then the content
245	* of pszBuf will be truncated.
246	* @param pCpu Pointer to the disassembler CPU state.
247	* @param pszBuf The output buffer.
248	* @param cchBuf The size of the output buffer.
249	* @param fFlags Format flags, see DIS_FORMAT_FLAGS_*.
250	* @param pfnGetSymbol Get symbol name for a jmp or call target address. Optional.
251	* @param pvUser User argument for pfnGetSymbol.
252	*/
253	DISDECL(size_t) DISFormatYasmEx(PCDISCPUSTATE pCpu, char *pszBuf, size_t cchBuf, uint32_t fFlags,
254	PFNDISGETSYMBOL pfnGetSymbol, void *pvUser)
255	{
256	/*
257	* Input validation and massaging.
258	*/
259	AssertPtr(pCpu);
260	AssertPtrNull(pszBuf);
261	Assert(pszBuf \|\| !cchBuf);
262	AssertPtrNull(pfnGetSymbol);
263	AssertMsg(DIS_FMT_FLAGS_IS_VALID(fFlags), ("%#x\n", fFlags));
264	if (fFlags & DIS_FMT_FLAGS_ADDR_COMMENT)
265	fFlags = (fFlags & ~DIS_FMT_FLAGS_ADDR_LEFT) \| DIS_FMT_FLAGS_ADDR_RIGHT;
266	if (fFlags & DIS_FMT_FLAGS_BYTES_COMMENT)
267	fFlags = (fFlags & ~DIS_FMT_FLAGS_BYTES_LEFT) \| DIS_FMT_FLAGS_BYTES_RIGHT;
268
269	PCOPCODE const pOp = pCpu->pCurInstr;
270
271	/*
272	* Output macros
273	*/
274	char *pszDst = pszBuf;
275	size_t cchDst = cchBuf;
276	size_t cchOutput = 0;
277	#define PUT_C(ch) \
278	do { \
279	cchOutput++; \
280	if (cchDst > 1) \
281	{ \
282	cchDst--; \
283	*pszDst++ = (ch); \
284	} \
285	} while (0)
286	#define PUT_STR(pszSrc, cchSrc) \
287	do { \
288	cchOutput += (cchSrc); \
289	if (cchDst > (cchSrc)) \
290	{ \
291	memcpy(pszDst, (pszSrc), (cchSrc)); \
292	pszDst += (cchSrc); \
293	cchDst -= (cchSrc); \
294	} \
295	else if (cchDst > 1) \
296	{ \
297	memcpy(pszDst, (pszSrc), cchDst - 1); \
298	pszDst += cchDst - 1; \
299	cchDst = 1; \
300	} \
301	} while (0)
302	#define PUT_SZ(sz) \
303	PUT_STR((sz), sizeof(sz) - 1)
304	#define PUT_SZ_STRICT(szStrict, szRelaxed) \
305	do { if (fFlags & DIS_FMT_FLAGS_STRICT) PUT_SZ(szStrict); else PUT_SZ(szRelaxed); } while (0)
306	#define PUT_PSZ(psz) \
307	do { const size_t cchTmp = strlen(psz); PUT_STR((psz), cchTmp); } while (0)
308	#define PUT_NUM(cch, fmt, num) \
309	do { \
310	cchOutput += (cch); \
311	if (cchDst > 1) \
312	{ \
313	const size_t cchTmp = RTStrPrintf(pszDst, cchDst, fmt, (num)); \
314	pszDst += cchTmp; \
315	cchDst -= cchTmp; \
316	Assert(cchTmp == (cch) \|\| cchDst == 1); \
317	} \
318	} while (0)
319	/** @todo add two flags for choosing between %X / %x and h / 0x. */
320	#define PUT_NUM_8(num) PUT_NUM(4, "0%02xh", (uint8_t)(num))
321	#define PUT_NUM_16(num) PUT_NUM(6, "0%04xh", (uint16_t)(num))
322	#define PUT_NUM_32(num) PUT_NUM(10, "0%08xh", (uint32_t)(num))
323	#define PUT_NUM_64(num) PUT_NUM(18, "0%016RX64h", (uint64_t)(num))
324
325	#define PUT_NUM_SIGN(cch, fmt, num, stype, utype) \
326	do { \
327	if ((stype)(num) >= 0) \
328	{ \
329	PUT_C('+'); \
330	PUT_NUM(cch, fmt, (utype)(num)); \
331	} \
332	else \
333	{ \
334	PUT_C('-'); \
335	PUT_NUM(cch, fmt, (utype)-(stype)(num)); \
336	} \
337	} while (0)
338	#define PUT_NUM_S8(num) PUT_NUM_SIGN(4, "0%02xh", num, int8_t, uint8_t)
339	#define PUT_NUM_S16(num) PUT_NUM_SIGN(6, "0%04xh", num, int16_t, uint16_t)
340	#define PUT_NUM_S32(num) PUT_NUM_SIGN(10, "0%08xh", num, int32_t, uint32_t)
341	#define PUT_NUM_S64(num) PUT_NUM_SIGN(18, "0%016RX64h", num, int64_t, uint64_t)
342
343
344	/*
345	* The address?
346	*/
347	if (fFlags & DIS_FMT_FLAGS_ADDR_LEFT)
348	{
349	#if HC_ARCH_BITS == 64 \|\| GC_ARCH_BITS == 64
350	if (pCpu->opaddr >= _4G)
351	PUT_NUM(9, "%08x`", (uint32_t)(pCpu->opaddr >> 32));
352	#endif
353	PUT_NUM(8, "%08x", (uint32_t)pCpu->opaddr);
354	PUT_C(' ');
355	}
356
357	/*
358	* The opcode bytes?
359	*/
360	if (fFlags & DIS_FMT_FLAGS_BYTES_LEFT)
361	{
362	size_t cchTmp = disFormatBytes(pCpu, pszDst, cchDst, fFlags);
363	cchOutput += cchTmp;
364	if (cchDst > 1)
365	{
366	if (cchTmp <= cchDst)
367	{
368	cchDst -= cchTmp;
369	pszDst += cchTmp;
370	}
371	else
372	{
373	pszDst += cchDst - 1;
374	cchDst = 1;
375	}
376	}
377
378	/* Some padding to align the instruction. */
379	size_t cchPadding = (7 * (2 + !!(fFlags & DIS_FMT_FLAGS_BYTES_SPACED)))
380	+ !!(fFlags & DIS_FMT_FLAGS_BYTES_BRACKETS) * 2
381	+ 2;
382	cchPadding = cchTmp + 1 >= cchPadding ? 1 : cchPadding - cchTmp;
383	PUT_STR(g_szSpaces, cchPadding);
384	}
385
386
387	/*
388	* Filter out invalid opcodes first as they need special
389	* treatment. UD2 is an exception and should be handled normally.
390	*/
391	size_t const offInstruction = cchOutput;
392	if ( pOp->opcode == OP_INVALID
393	\|\| ( pOp->opcode == OP_ILLUD2
394	&& (pCpu->prefix & PREFIX_LOCK)))
395	{
396
397	}
398	else
399	{
400	/*
401	* Prefixes
402	*/
403	if (pCpu->prefix & PREFIX_LOCK)
404	PUT_SZ("lock ");
405	if(pCpu->prefix & PREFIX_REP)
406	PUT_SZ("rep ");
407	else if(pCpu->prefix & PREFIX_REPNE)
408	PUT_SZ("repne ");
409
410	/*
411	* Adjust the format string to the correct mnemonic
412	* or to avoid things the assembler cannot handle correctly.
413	*/
414	char szTmpFmt[48];
415	const char *pszFmt = pOp->pszOpcode;
416	switch (pOp->opcode)
417	{
418	case OP_JECXZ:
419	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "jcxz %Jb" : pCpu->opmode == CPUMODE_32BIT ? "jecxz %Jb" : "jrcxz %Jb";
420	break;
421	case OP_PUSHF:
422	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "pushfw" : pCpu->opmode == CPUMODE_32BIT ? "pushfd" : "pushfq";
423	break;
424	case OP_POPF:
425	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "popfw" : pCpu->opmode == CPUMODE_32BIT ? "popfd" : "popfq";
426	break;
427	case OP_PUSHA:
428	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "pushaw" : "pushad";
429	break;
430	case OP_POPA:
431	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "popaw" : "popad";
432	break;
433	case OP_INSB:
434	pszFmt = "insb";
435	break;
436	case OP_INSWD:
437	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "insw" : pCpu->opmode == CPUMODE_32BIT ? "insd" : "insq";
438	break;
439	case OP_OUTSB:
440	pszFmt = "outsb";
441	break;
442	case OP_OUTSWD:
443	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "outsw" : pCpu->opmode == CPUMODE_32BIT ? "outsd" : "outsq";
444	break;
445	case OP_MOVSB:
446	pszFmt = "movsb";
447	break;
448	case OP_MOVSWD:
449	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "movsw" : pCpu->opmode == CPUMODE_32BIT ? "movsd" : "movsq";
450	break;
451	case OP_CMPSB:
452	pszFmt = "cmpsb";
453	break;
454	case OP_CMPWD:
455	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "cmpsw" : pCpu->opmode == CPUMODE_32BIT ? "cmpsd" : "cmpsq";
456	break;
457	case OP_SCASB:
458	pszFmt = "scasb";
459	break;
460	case OP_SCASWD:
461	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "scasw" : pCpu->opmode == CPUMODE_32BIT ? "scasd" : "scasq";
462	break;
463	case OP_LODSB:
464	pszFmt = "lodsb";
465	break;
466	case OP_LODSWD:
467	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "lodsw" : pCpu->opmode == CPUMODE_32BIT ? "lodsd" : "lodsq";
468	break;
469	case OP_STOSB:
470	pszFmt = "stosb";
471	break;
472	case OP_STOSWD:
473	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "stosw" : pCpu->opmode == CPUMODE_32BIT ? "stosd" : "stosq";
474	break;
475	case OP_CBW:
476	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "cbw" : pCpu->opmode == CPUMODE_32BIT ? "cwde" : "cdqe";
477	break;
478	case OP_CWD:
479	pszFmt = pCpu->opmode == CPUMODE_16BIT ? "cwd" : pCpu->opmode == CPUMODE_32BIT ? "cdq" : "cqo";
480	break;
481	case OP_SHL:
482	Assert(pszFmt[3] == '/');
483	pszFmt += 4;
484	break;
485	case OP_XLAT:
486	pszFmt = "xlatb";
487	break;
488	case OP_INT3:
489	pszFmt = "int3";
490	break;
491
492	/*
493	* Don't know how to tell yasm to generate complicated nop stuff, so 'db' it.
494	*/
495	case OP_NOP:
496	if (pCpu->opcode == 0x90)
497	/* fine, fine */;
498	else if (pszFmt[sizeof("nop %Ev") - 1] == '/' && pszFmt[sizeof("nop %Ev")] == 'p')
499	pszFmt = "prefetch %Eb";
500	else if (pCpu->opcode == 0x1f)
501	{
502	Assert(pCpu->opsize >= 3);
503	PUT_SZ("db 00fh, 01fh,");
504	PUT_NUM_8(pCpu->ModRM.u);
505	for (unsigned i = 3; i < pCpu->opsize; i++)
506	{
507	PUT_C(',');
508	PUT_NUM_8(0x90); ///@todo fixme.
509	}
510	pszFmt = "";
511	}
512	break;
513
514	default:
515	/* ST(X) -> stX (floating point) */
516	if (*pszFmt == 'f' && strchr(pszFmt, '('))
517	{
518	char *pszFmtDst = szTmpFmt;
519	char ch;
520	do
521	{
522	ch = *pszFmt++;
523	if (ch == 'S' && pszFmt[0] == 'T' && pszFmt[1] == '(')
524	{
525	*pszFmtDst++ = 's';
526	*pszFmtDst++ = 't';
527	pszFmt += 2;
528	ch = *pszFmt;
529	Assert(pszFmt[1] == ')');
530	pszFmt += 2;
531	*pszFmtDst++ = ch;
532	}
533	else
534	*pszFmtDst++ = ch;
535	} while (ch != '\0');
536	pszFmt = szTmpFmt;
537	}
538	break;
539
540	/*
541	* Horrible hacks.
542	*/
543	case OP_FLD:
544	if (pCpu->opcode == 0xdb) /* m80fp workaround. */
545	(int )&pCpu->param1.param &= ~0x1f; /* make it pure OP_PARM_M */
546	break;
547	case OP_LAR: /* hack w -> v, probably not correct. */
548	(int )&pCpu->param2.param &= ~0x1f;
549	(int )&pCpu->param2.param \|= OP_PARM_v;
550	break;
551	}
552
553	/*
554	* Formatting context and associated macros.
555	*/
556	PCOP_PARAMETER pParam = &pCpu->param1;
557	int iParam = 1;
558
559	#define PUT_FAR() \
560	do { \
561	if ( OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_p \
562	&& pOp->opcode != OP_LDS /* table bugs? */ \
563	&& pOp->opcode != OP_LES \
564	&& pOp->opcode != OP_LFS \
565	&& pOp->opcode != OP_LGS \
566	&& pOp->opcode != OP_LSS ) \
567	PUT_SZ("far "); \
568	} while (0)
569	/** @todo mov ah,ch ends up with a byte 'override'... - check if this wasn't fixed. */
570	/** @todo drop the work/dword/qword override when the src/dst is a register (except for movsx/movzx). */
571	#define PUT_SIZE_OVERRIDE() \
572	do { \
573	switch (OP_PARM_VSUBTYPE(pParam->param)) \
574	{ \
575	case OP_PARM_v: \
576	switch (pCpu->opmode) \
577	{ \
578	case CPUMODE_16BIT: PUT_SZ("word "); break; \
579	case CPUMODE_32BIT: PUT_SZ("dword "); break; \
580	case CPUMODE_64BIT: PUT_SZ("qword "); break; \
581	default: break; \
582	} \
583	break; \
584	case OP_PARM_b: PUT_SZ("byte "); break; \
585	case OP_PARM_w: PUT_SZ("word "); break; \
586	case OP_PARM_d: PUT_SZ("dword "); break; \
587	case OP_PARM_q: PUT_SZ("qword "); break; \
588	case OP_PARM_dq: \
589	if (OP_PARM_VTYPE(pParam->param) != OP_PARM_W) /* these are 128 bit, pray they are all unambiguous.. */ \
590	PUT_SZ("qword "); \
591	break; \
592	case OP_PARM_p: break; /* see PUT_FAR */ \
593	case OP_PARM_s: if (pParam->flags & USE_REG_FP) PUT_SZ("tword "); break; /* ?? */ \
594	case OP_PARM_z: break; \
595	case OP_PARM_NONE: \
596	if ( OP_PARM_VTYPE(pParam->param) == OP_PARM_M \
597	&& ((pParam->flags & USE_REG_FP) \|\| pOp->opcode == OP_FLD)) \
598	PUT_SZ("tword "); \
599	break; \
600	default: break; /no pointer type specified/necessary/ \
601	} \
602	} while (0)
603	static const char s_szSegPrefix[6][4] = { "es:", "cs:", "ss:", "ds:", "fs:", "gs:" };
604	#define PUT_SEGMENT_OVERRIDE() \
605	do { \
606	if (pCpu->prefix & PREFIX_SEG) \
607	PUT_STR(s_szSegPrefix[pCpu->enmPrefixSeg], 3); \
608	} while (0)
609
610
611	/*
612	* Segment prefixing for instructions that doesn't do memory access.
613	*/
614	if ( (pCpu->prefix & PREFIX_SEG)
615	&& !DIS_IS_EFFECTIVE_ADDR(pCpu->param1.flags)
616	&& !DIS_IS_EFFECTIVE_ADDR(pCpu->param2.flags)
617	&& !DIS_IS_EFFECTIVE_ADDR(pCpu->param3.flags))
618	{
619	PUT_STR(s_szSegPrefix[pCpu->enmPrefixSeg], 2);
620	PUT_C(' ');
621	}
622
623
624	/*
625	* The formatting loop.
626	*/
627	RTINTPTR off;
628	char szSymbol[128];
629	char ch;
630	while ((ch = *pszFmt++) != '\0')
631	{
632	if (ch == '%')
633	{
634	ch = *pszFmt++;
635	switch (ch)
636	{
637	/*
638	* ModRM - Register only.
639	*/
640	case 'C': /* Control register (ParseModRM / UseModRM). */
641	case 'D': /* Debug register (ParseModRM / UseModRM). */
642	case 'G': /* ModRM selects general register (ParseModRM / UseModRM). */
643	case 'S': /* ModRM byte selects a segment register (ParseModRM / UseModRM). */
644	case 'T': /* ModRM byte selects a test register (ParseModRM / UseModRM). */
645	case 'V': /* ModRM byte selects an XMM/SSE register (ParseModRM / UseModRM). */
646	case 'P': /* ModRM byte selects MMX register (ParseModRM / UseModRM). */
647	{
648	pszFmt += RT_C_IS_ALPHA(pszFmt[0]) ? RT_C_IS_ALPHA(pszFmt[1]) ? 2 : 1 : 0;
649	Assert(!(pParam->flags & (USE_INDEX \| USE_SCALE) /* No SIB here... */));
650	Assert(!(pParam->flags & (USE_DISPLACEMENT8 \| USE_DISPLACEMENT16 \| USE_DISPLACEMENT32 \| USE_DISPLACEMENT64 \| USE_RIPDISPLACEMENT32)));
651
652	size_t cchReg;
653	const char *pszReg = disasmFormatYasmBaseReg(pCpu, pParam, &cchReg);
654	PUT_STR(pszReg, cchReg);
655	break;
656	}
657
658	/*
659	* ModRM - Register or memory.
660	*/
661	case 'E': /* ModRM specifies parameter (ParseModRM / UseModRM / UseSIB). */
662	case 'Q': /* ModRM byte selects MMX register or memory address (ParseModRM / UseModRM). */
663	case 'R': /* ModRM byte may only refer to a general register (ParseModRM / UseModRM). */
664	case 'W': /* ModRM byte selects an XMM/SSE register or a memory address (ParseModRM / UseModRM). */
665	case 'M': /* ModRM may only refer to memory (ParseModRM / UseModRM). */
666	{
667	pszFmt += RT_C_IS_ALPHA(pszFmt[0]) ? RT_C_IS_ALPHA(pszFmt[1]) ? 2 : 1 : 0;
668
669	PUT_FAR();
670	if (DIS_IS_EFFECTIVE_ADDR(pParam->flags))
671	{
672	/* Work around mov seg,[mem16] and mov [mem16],seg as these always make a 16-bit mem
673	while the register variants deals with 16, 32 & 64 in the normal fashion. */
674	if ( pParam->param != OP_PARM_Ev
675	\|\| pOp->opcode != OP_MOV
676	\|\| ( pOp->param1 != OP_PARM_Sw
677	&& pOp->param2 != OP_PARM_Sw))
678	PUT_SIZE_OVERRIDE();
679	PUT_C('[');
680	}
681	if ( (fFlags & DIS_FMT_FLAGS_STRICT)
682	&& (pParam->flags & (USE_DISPLACEMENT8 \| USE_DISPLACEMENT16 \| USE_DISPLACEMENT32 \| USE_DISPLACEMENT64 \| USE_RIPDISPLACEMENT32)))
683	{
684	if ( (pParam->flags & USE_DISPLACEMENT8)
685	&& !pParam->disp8)
686	PUT_SZ("byte ");
687	else if ( (pParam->flags & USE_DISPLACEMENT16)
688	&& (int8_t)pParam->disp16 == (int16_t)pParam->disp16)
689	PUT_SZ("word ");
690	else if ( (pParam->flags & USE_DISPLACEMENT32)
691	&& (int8_t)pParam->disp32 == (int32_t)pParam->disp32)
692	PUT_SZ("dword ");
693	else if ( (pParam->flags & USE_DISPLACEMENT64)
694	&& (int8_t)pParam->disp64 == (int64_t)pParam->disp32)
695	PUT_SZ("qword ");
696	}
697	if (DIS_IS_EFFECTIVE_ADDR(pParam->flags))
698	PUT_SEGMENT_OVERRIDE();
699
700	bool fBase = (pParam->flags & USE_BASE) /* When exactly is USE_BASE supposed to be set? disasmModRMReg doesn't set it. */
701	\|\| ( (pParam->flags & (USE_REG_GEN8 \| USE_REG_GEN16 \| USE_REG_GEN32 \| USE_REG_GEN64))
702	&& !DIS_IS_EFFECTIVE_ADDR(pParam->flags));
703	if (fBase)
704	{
705	size_t cchReg;
706	const char *pszReg = disasmFormatYasmBaseReg(pCpu, pParam, &cchReg);
707	PUT_STR(pszReg, cchReg);
708	}
709
710	if (pParam->flags & USE_INDEX)
711	{
712	if (fBase)
713	PUT_C('+');
714
715	size_t cchReg;
716	const char *pszReg = disasmFormatYasmIndexReg(pCpu, pParam, &cchReg);
717	PUT_STR(pszReg, cchReg);
718
719	if (pParam->flags & USE_SCALE)
720	{
721	PUT_C('*');
722	PUT_C('0' + pParam->scale);
723	}
724	}
725	else
726	Assert(!(pParam->flags & USE_SCALE));
727
728	if (pParam->flags & (USE_DISPLACEMENT8 \| USE_DISPLACEMENT16 \| USE_DISPLACEMENT32 \| USE_DISPLACEMENT64 \| USE_RIPDISPLACEMENT32))
729	{
730	int64_t off2;
731	if (pParam->flags & USE_DISPLACEMENT8)
732	off2 = pParam->disp8;
733	else if (pParam->flags & USE_DISPLACEMENT16)
734	off2 = pParam->disp16;
735	else if (pParam->flags & (USE_DISPLACEMENT32 \| USE_RIPDISPLACEMENT32))
736	off2 = pParam->disp32;
737	else if (pParam->flags & USE_DISPLACEMENT64)
738	off2 = pParam->disp64;
739	else
740	{
741	AssertFailed();
742	off2 = 0;
743	}
744
745	if (fBase \|\| (pParam->flags & USE_INDEX))
746	{
747	PUT_C(off2 >= 0 ? '+' : '-');
748	if (off2 < 0)
749	off2 = -off2;
750	}
751	if (pParam->flags & USE_DISPLACEMENT8)
752	PUT_NUM_8( off2);
753	else if (pParam->flags & USE_DISPLACEMENT16)
754	PUT_NUM_16(off2);
755	else if (pParam->flags & USE_DISPLACEMENT32)
756	PUT_NUM_32(off2);
757	else if (pParam->flags & USE_DISPLACEMENT64)
758	PUT_NUM_64(off2);
759	else
760	{
761	PUT_NUM_32(off2);
762	PUT_SZ(" wrt rip"); //??
763	}
764	}
765
766	if (DIS_IS_EFFECTIVE_ADDR(pParam->flags))
767	PUT_C(']');
768	break;
769	}
770
771	case 'F': /* Eflags register (0 - popf/pushf only, avoided in adjustments above). */
772	AssertFailed();
773	break;
774
775	case 'I': /* Immediate data (ParseImmByte, ParseImmByteSX, ParseImmV, ParseImmUshort, ParseImmZ). */
776	Assert(pszFmt == 'b' \|\| pszFmt == 'v' \|\| pszFmt == 'w' \|\| pszFmt == 'z'); pszFmt++;
777	switch (pParam->flags & ( USE_IMMEDIATE8 \| USE_IMMEDIATE16 \| USE_IMMEDIATE32 \| USE_IMMEDIATE64
778	\| USE_IMMEDIATE16_SX8 \| USE_IMMEDIATE32_SX8 \| USE_IMMEDIATE64_SX8))
779	{
780	case USE_IMMEDIATE8:
781	if ( (fFlags & DIS_FMT_FLAGS_STRICT)
782	&& ( (pOp->param1 >= OP_PARM_REG_GEN8_START && pOp->param1 <= OP_PARM_REG_GEN8_END)
783	\|\| (pOp->param2 >= OP_PARM_REG_GEN8_START && pOp->param2 <= OP_PARM_REG_GEN8_END))
784	)
785	PUT_SZ("strict byte ");
786	PUT_NUM_8(pParam->parval);
787	break;
788
789	case USE_IMMEDIATE16:
790	if ( pCpu->mode != pCpu->opmode
791	\|\| ( (fFlags & DIS_FMT_FLAGS_STRICT)
792	&& ( (int8_t)pParam->parval == (int16_t)pParam->parval
793	\|\| (pOp->param1 >= OP_PARM_REG_GEN16_START && pOp->param1 <= OP_PARM_REG_GEN16_END)
794	\|\| (pOp->param2 >= OP_PARM_REG_GEN16_START && pOp->param2 <= OP_PARM_REG_GEN16_END))
795	)
796	)
797	{
798	if (OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_b)
799	PUT_SZ_STRICT("strict byte ", "byte ");
800	else if (OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_v)
801	PUT_SZ_STRICT("strict word ", "word ");
802	}
803	PUT_NUM_16(pParam->parval);
804	break;
805
806	case USE_IMMEDIATE16_SX8:
807	PUT_SZ_STRICT("strict byte ", "byte ");
808	PUT_NUM_16(pParam->parval);
809	break;
810
811	case USE_IMMEDIATE32:
812	if ( pCpu->opmode != (pCpu->mode == CPUMODE_16BIT ? CPUMODE_16BIT : CPUMODE_32BIT) /* not perfect */
813	\|\| ( (fFlags & DIS_FMT_FLAGS_STRICT)
814	&& ( (int8_t)pParam->parval == (int32_t)pParam->parval
815	\|\| (pOp->param1 >= OP_PARM_REG_GEN32_START && pOp->param1 <= OP_PARM_REG_GEN32_END)
816	\|\| (pOp->param2 >= OP_PARM_REG_GEN32_START && pOp->param2 <= OP_PARM_REG_GEN32_END))
817	)
818	)
819	{
820	if (OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_b)
821	PUT_SZ_STRICT("strict byte ", "byte ");
822	else if (OP_PARM_VSUBTYPE(pParam->param) == OP_PARM_v)
823	PUT_SZ_STRICT("strict dword ", "dword ");
824	}
825	PUT_NUM_32(pParam->parval);
826	break;
827
828	case USE_IMMEDIATE32_SX8:
829	PUT_SZ_STRICT("strict byte ", "byte ");
830	PUT_NUM_32(pParam->parval);
831	break;
832
833	case USE_IMMEDIATE64_SX8:
834	PUT_SZ_STRICT("strict byte ", "byte ");
835	PUT_NUM_64(pParam->parval);
836	break;
837
838	case USE_IMMEDIATE64:
839	PUT_NUM_64(pParam->parval);
840	break;
841
842	default:
843	AssertFailed();
844	break;
845	}
846	break;
847
848	case 'J': /* Relative jump offset (ParseImmBRel + ParseImmVRel). */
849	{
850	int32_t offDisplacement;
851	Assert(iParam == 1);
852	bool fPrefix = (fFlags & DIS_FMT_FLAGS_STRICT)
853	&& pOp->opcode != OP_CALL
854	&& pOp->opcode != OP_LOOP
855	&& pOp->opcode != OP_LOOPE
856	&& pOp->opcode != OP_LOOPNE
857	&& pOp->opcode != OP_JECXZ;
858	if (pOp->opcode == OP_CALL)
859	fFlags &= ~DIS_FMT_FLAGS_RELATIVE_BRANCH;
860
861	if (pParam->flags & USE_IMMEDIATE8_REL)
862	{
863	if (fPrefix)
864	PUT_SZ("short ");
865	offDisplacement = (int8_t)pParam->parval;
866	Assert(*pszFmt == 'b'); pszFmt++;
867
868	if (fFlags & DIS_FMT_FLAGS_RELATIVE_BRANCH)
869	PUT_NUM_S8(offDisplacement);
870	}
871	else if (pParam->flags & USE_IMMEDIATE16_REL)
872	{
873	if (fPrefix)
874	PUT_SZ("near ");
875	offDisplacement = (int16_t)pParam->parval;
876	Assert(*pszFmt == 'v'); pszFmt++;
877
878	if (fFlags & DIS_FMT_FLAGS_RELATIVE_BRANCH)
879	PUT_NUM_S16(offDisplacement);
880	}
881	else
882	{
883	if (fPrefix)
884	PUT_SZ("near ");
885	offDisplacement = (int32_t)pParam->parval;
886	Assert(pParam->flags & (USE_IMMEDIATE32_REL\|USE_IMMEDIATE64_REL));
887	Assert(*pszFmt == 'v'); pszFmt++;
888
889	if (fFlags & DIS_FMT_FLAGS_RELATIVE_BRANCH)
890	PUT_NUM_S32(offDisplacement);
891	}
892	if (fFlags & DIS_FMT_FLAGS_RELATIVE_BRANCH)
893	PUT_SZ(" (");
894
895	RTUINTPTR uTrgAddr = pCpu->opaddr + pCpu->opsize + offDisplacement;
896	if (pCpu->mode == CPUMODE_16BIT)
897	PUT_NUM_16(uTrgAddr);
898	else if (pCpu->mode == CPUMODE_32BIT)
899	PUT_NUM_32(uTrgAddr);
900	else
901	PUT_NUM_64(uTrgAddr);
902
903	if (pfnGetSymbol)
904	{
905	int rc = pfnGetSymbol(pCpu, DIS_FMT_SEL_FROM_REG(DIS_SELREG_CS), uTrgAddr, szSymbol, sizeof(szSymbol), &off, pvUser);
906	if (RT_SUCCESS(rc))
907	{
908	PUT_SZ(" [");
909	PUT_PSZ(szSymbol);
910	if (off != 0)
911	{
912	if ((int8_t)off == off)
913	PUT_NUM_S8(off);
914	else if ((int16_t)off == off)
915	PUT_NUM_S16(off);
916	else if ((int32_t)off == off)
917	PUT_NUM_S32(off);
918	else
919	PUT_NUM_S64(off);
920	}
921	PUT_C(']');
922	}
923	}
924
925	if (fFlags & DIS_FMT_FLAGS_RELATIVE_BRANCH)
926	PUT_C(')');
927	break;
928	}
929
930	case 'A': /* Direct (jump/call) address (ParseImmAddr). */
931	{
932	Assert(*pszFmt == 'p'); pszFmt++;
933	PUT_FAR();
934	PUT_SIZE_OVERRIDE();
935	PUT_SEGMENT_OVERRIDE();
936	int rc = VERR_SYMBOL_NOT_FOUND;
937	switch (pParam->flags & (USE_IMMEDIATE_ADDR_16_16 \| USE_IMMEDIATE_ADDR_16_32 \| USE_DISPLACEMENT64 \| USE_DISPLACEMENT32 \| USE_DISPLACEMENT16))
938	{
939	case USE_IMMEDIATE_ADDR_16_16:
940	PUT_NUM_16(pParam->parval >> 16);
941	PUT_C(':');
942	PUT_NUM_16(pParam->parval);
943	if (pfnGetSymbol)
944	rc = pfnGetSymbol(pCpu, DIS_FMT_SEL_FROM_VALUE(pParam->parval >> 16), (uint16_t)pParam->parval, szSymbol, sizeof(szSymbol), &off, pvUser);
945	break;
946	case USE_IMMEDIATE_ADDR_16_32:
947	PUT_NUM_16(pParam->parval >> 32);
948	PUT_C(':');
949	PUT_NUM_32(pParam->parval);
950	if (pfnGetSymbol)
951	rc = pfnGetSymbol(pCpu, DIS_FMT_SEL_FROM_VALUE(pParam->parval >> 16), (uint32_t)pParam->parval, szSymbol, sizeof(szSymbol), &off, pvUser);
952	break;
953	case USE_DISPLACEMENT16:
954	PUT_NUM_16(pParam->parval);
955	if (pfnGetSymbol)
956	rc = pfnGetSymbol(pCpu, DIS_FMT_SEL_FROM_REG(DIS_SELREG_CS), (uint16_t)pParam->parval, szSymbol, sizeof(szSymbol), &off, pvUser);
957	break;
958	case USE_DISPLACEMENT32:
959	PUT_NUM_32(pParam->parval);
960	if (pfnGetSymbol)
961	rc = pfnGetSymbol(pCpu, DIS_FMT_SEL_FROM_REG(DIS_SELREG_CS), (uint32_t)pParam->parval, szSymbol, sizeof(szSymbol), &off, pvUser);
962	break;
963	case USE_DISPLACEMENT64:
964	PUT_NUM_64(pParam->parval);
965	if (pfnGetSymbol)
966	rc = pfnGetSymbol(pCpu, DIS_FMT_SEL_FROM_REG(DIS_SELREG_CS), (uint64_t)pParam->parval, szSymbol, sizeof(szSymbol), &off, pvUser);
967	break;
968	default:
969	AssertFailed();
970	break;
971	}
972
973	if (RT_SUCCESS(rc))
974	{
975	PUT_SZ(" [");
976	PUT_PSZ(szSymbol);
977	if (off != 0)
978	{
979	if ((int8_t)off == off)
980	PUT_NUM_S8(off);
981	else if ((int16_t)off == off)
982	PUT_NUM_S16(off);
983	else if ((int32_t)off == off)
984	PUT_NUM_S32(off);
985	else
986	PUT_NUM_S64(off);
987	}
988	PUT_C(']');
989	}
990	break;
991	}
992
993	case 'O': /* No ModRM byte (ParseImmAddr). */
994	{
995	Assert(pszFmt == 'b' \|\| pszFmt == 'v'); pszFmt++;
996	PUT_FAR();
997	PUT_SIZE_OVERRIDE();
998	PUT_C('[');
999	PUT_SEGMENT_OVERRIDE();
1000	int rc = VERR_SYMBOL_NOT_FOUND;
1001	switch (pParam->flags & (USE_IMMEDIATE_ADDR_16_16 \| USE_IMMEDIATE_ADDR_16_32 \| USE_DISPLACEMENT64 \| USE_DISPLACEMENT32 \| USE_DISPLACEMENT16))
1002	{
1003	case USE_IMMEDIATE_ADDR_16_16:
1004	PUT_NUM_16(pParam->parval >> 16);
1005	PUT_C(':');
1006	PUT_NUM_16(pParam->parval);
1007	if (pfnGetSymbol)
1008	rc = pfnGetSymbol(pCpu, DIS_FMT_SEL_FROM_VALUE(pParam->parval >> 16), (uint16_t)pParam->parval, szSymbol, sizeof(szSymbol), &off, pvUser);
1009	break;
1010	case USE_IMMEDIATE_ADDR_16_32:
1011	PUT_NUM_16(pParam->parval >> 32);
1012	PUT_C(':');
1013	PUT_NUM_32(pParam->parval);
1014	if (pfnGetSymbol)
1015	rc = pfnGetSymbol(pCpu, DIS_FMT_SEL_FROM_VALUE(pParam->parval >> 16), (uint32_t)pParam->parval, szSymbol, sizeof(szSymbol), &off, pvUser);
1016	break;
1017	case USE_DISPLACEMENT16:
1018	PUT_NUM_16(pParam->disp16);
1019	if (pfnGetSymbol)
1020	rc = pfnGetSymbol(pCpu, DIS_FMT_SEL_FROM_REG(DIS_SELREG_CS), (uint16_t)pParam->disp16, szSymbol, sizeof(szSymbol), &off, pvUser);
1021	break;
1022	case USE_DISPLACEMENT32:
1023	PUT_NUM_32(pParam->disp32);
1024	if (pfnGetSymbol)
1025	rc = pfnGetSymbol(pCpu, DIS_FMT_SEL_FROM_REG(DIS_SELREG_CS), (uint32_t)pParam->disp32, szSymbol, sizeof(szSymbol), &off, pvUser);
1026	break;
1027	case USE_DISPLACEMENT64:
1028	PUT_NUM_64(pParam->disp64);
1029	if (pfnGetSymbol)
1030	rc = pfnGetSymbol(pCpu, DIS_FMT_SEL_FROM_REG(DIS_SELREG_CS), (uint64_t)pParam->disp64, szSymbol, sizeof(szSymbol), &off, pvUser);
1031	break;
1032	default:
1033	AssertFailed();
1034	break;
1035	}
1036	PUT_C(']');
1037
1038	if (RT_SUCCESS(rc))
1039	{
1040	PUT_SZ(" (");
1041	PUT_PSZ(szSymbol);
1042	if (off != 0)
1043	{
1044	if ((int8_t)off == off)
1045	PUT_NUM_S8(off);
1046	else if ((int16_t)off == off)
1047	PUT_NUM_S16(off);
1048	else if ((int32_t)off == off)
1049	PUT_NUM_S32(off);
1050	else
1051	PUT_NUM_S64(off);
1052	}
1053	PUT_C(')');
1054	}
1055	break;
1056	}
1057
1058	case 'X': /* DS:SI (ParseXb, ParseXv). */
1059	case 'Y': /* ES:DI (ParseYb, ParseYv). */
1060	{
1061	Assert(pszFmt == 'b' \|\| pszFmt == 'v'); pszFmt++;
1062	PUT_FAR();
1063	PUT_SIZE_OVERRIDE();
1064	PUT_C('[');
1065	if (pParam->flags & USE_POINTER_DS_BASED)
1066	PUT_SZ("ds:");
1067	else
1068	PUT_SZ("es:");
1069
1070	size_t cchReg;
1071	const char *pszReg = disasmFormatYasmBaseReg(pCpu, pParam, &cchReg);
1072	PUT_STR(pszReg, cchReg);
1073	PUT_C(']');
1074	break;
1075	}
1076
1077	case 'e': /* Register based on operand size (e.g. %eAX) (ParseFixedReg). */
1078	{
1079	Assert(RT_C_IS_ALPHA(pszFmt[0]) && RT_C_IS_ALPHA(pszFmt[1]) && !RT_C_IS_ALPHA(pszFmt[2])); pszFmt += 2;
1080	size_t cchReg;
1081	const char *pszReg = disasmFormatYasmBaseReg(pCpu, pParam, &cchReg);
1082	PUT_STR(pszReg, cchReg);
1083	break;
1084	}
1085
1086	default:
1087	AssertMsgFailed(("%c%s!\n", ch, pszFmt));
1088	break;
1089	}
1090	AssertMsg(pszFmt == ',' \|\| pszFmt == '\0', ("%c%s\n", ch, pszFmt));
1091	}
1092	else
1093	{
1094	PUT_C(ch);
1095	if (ch == ',')
1096	{
1097	Assert(*pszFmt != ' ');
1098	PUT_C(' ');
1099	switch (++iParam)
1100	{
1101	case 2: pParam = &pCpu->param2; break;
1102	case 3: pParam = &pCpu->param3; break;
1103	default: pParam = NULL; break;
1104	}
1105	}
1106	}
1107	} /* while more to format */
1108	}
1109
1110	/*
1111	* Any additional output to the right of the instruction?
1112	*/
1113	if (fFlags & (DIS_FMT_FLAGS_BYTES_RIGHT \| DIS_FMT_FLAGS_ADDR_RIGHT))
1114	{
1115	/* some up front padding. */
1116	size_t cchPadding = cchOutput - offInstruction;
1117	cchPadding = cchPadding + 1 >= 42 ? 1 : 42 - cchPadding;
1118	PUT_STR(g_szSpaces, cchPadding);
1119
1120	/* comment? */
1121	if (fFlags & (DIS_FMT_FLAGS_BYTES_RIGHT \| DIS_FMT_FLAGS_ADDR_RIGHT))
1122	PUT_SZ(";");
1123
1124	/*
1125	* The address?
1126	*/
1127	if (fFlags & DIS_FMT_FLAGS_ADDR_RIGHT)
1128	{
1129	PUT_C(' ');
1130	#if HC_ARCH_BITS == 64 \|\| GC_ARCH_BITS == 64
1131	if (pCpu->opaddr >= _4G)
1132	PUT_NUM(9, "%08x`", (uint32_t)(pCpu->opaddr >> 32));
1133	#endif
1134	PUT_NUM(8, "%08x", (uint32_t)pCpu->opaddr);
1135	}
1136
1137	/*
1138	* Opcode bytes?
1139	*/
1140	if (fFlags & DIS_FMT_FLAGS_BYTES_RIGHT)
1141	{
1142	PUT_C(' ');
1143	size_t cchTmp = disFormatBytes(pCpu, pszDst, cchDst, fFlags);
1144	cchOutput += cchTmp;
1145	if (cchTmp >= cchDst)
1146	cchTmp = cchDst - (cchDst != 0);
1147	cchDst -= cchTmp;
1148	pszDst += cchTmp;
1149	}
1150	}
1151
1152	/*
1153	* Terminate it - on overflow we'll have reserved one byte for this.
1154	*/
1155	if (cchDst > 0)
1156	*pszDst = '\0';
1157	else
1158	Assert(!cchBuf);
1159
1160	/* clean up macros */
1161	#undef PUT_PSZ
1162	#undef PUT_SZ
1163	#undef PUT_STR
1164	#undef PUT_C
1165	return cchOutput;
1166	}
1167
1168
1169	/**
1170	* Formats the current instruction in Yasm (/ Nasm) style.
1171	*
1172	* This is a simplified version of DISFormatYasmEx() provided for your convenience.
1173	*
1174	*
1175	* @returns The number of output characters. If this is >= cchBuf, then the content
1176	* of pszBuf will be truncated.
1177	* @param pCpu Pointer to the disassembler CPU state.
1178	* @param pszBuf The output buffer.
1179	* @param cchBuf The size of the output buffer.
1180	*/
1181	DISDECL(size_t) DISFormatYasm(PCDISCPUSTATE pCpu, char *pszBuf, size_t cchBuf)
1182	{
1183	return DISFormatYasmEx(pCpu, pszBuf, cchBuf, 0 /* fFlags /, NULL / pfnGetSymbol /, NULL / pvUser */);
1184	}
1185

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source: vbox/trunk/src/VBox/Disassembler/DisasmFormatYasm.cpp@ 30855

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