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