VirtualBox

source: vbox/trunk/src/VBox/Disassembler/DisasmFormatBytes.cpp@ 103068

Last change on this file since 103068 was 101539, checked in by vboxsync, 9 months ago

DIS,VMM,DBGC,IPRT,++: Some disassembler tweaks and TB disassembly work. bugref:10371 bugref:9898

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id Revision
File size: 2.9 KB
Line 
1/* $Id: DisasmFormatBytes.cpp 101539 2023-10-22 02:43:09Z vboxsync $ */
2/** @file
3 * VBox Disassembler - Helper for formatting the opcode bytes.
4 */
5
6/*
7 * Copyright (C) 2008-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * SPDX-License-Identifier: GPL-3.0-only
26 */
27
28
29/*********************************************************************************************************************************
30* Header Files *
31*********************************************************************************************************************************/
32#include "DisasmInternal.h"
33#include <iprt/string.h>
34#include <iprt/assert.h>
35#include <iprt/errcore.h>
36
37
38/**
39 * Helper function for formatting the opcode bytes.
40 *
41 * @returns The number of output bytes.
42 *
43 * @param pDis Pointer to the disassembler state.
44 * @param pszDst The output buffer.
45 * @param cchDst The size of the output buffer.
46 * @param fFlags The flags passed to the formatter.
47 */
48size_t disFormatBytes(PCDISSTATE pDis, char *pszDst, size_t cchDst, uint32_t fFlags)
49{
50 size_t cchOutput = 0;
51 uint32_t cb = pDis->cbInstr;
52 AssertStmt(cb <= 16, cb = 16);
53
54#define PUT_C(ch) \
55 do { \
56 cchOutput++; \
57 if (cchDst > 1) \
58 { \
59 cchDst--; \
60 *pszDst++ = (ch); \
61 } \
62 } while (0)
63#define PUT_NUM(cch, fmt, num) \
64 do { \
65 cchOutput += (cch); \
66 if (cchDst > 1) \
67 { \
68 const size_t cchTmp = RTStrPrintf(pszDst, cchDst, fmt, (num)); \
69 pszDst += cchTmp; \
70 cchDst -= cchTmp; \
71 } \
72 } while (0)
73
74
75 if (fFlags & DIS_FMT_FLAGS_BYTES_BRACKETS)
76 PUT_C('[');
77
78 for (uint32_t i = 0; i < cb; i++)
79 {
80 if (i != 0 && (fFlags & DIS_FMT_FLAGS_BYTES_SPACED))
81 PUT_NUM(3, " %02x", pDis->Instr.ab[i]);
82 else
83 PUT_NUM(2, "%02x", pDis->Instr.ab[i]);
84 }
85
86 if (fFlags & DIS_FMT_FLAGS_BYTES_BRACKETS)
87 PUT_C(']');
88
89 /* Terminate it just in case. */
90 if (cchDst >= 1)
91 *pszDst = '\0';
92
93#undef PUT_C
94#undef PUT_NUM
95 return cchOutput;
96}
97
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