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/* $Id: Disasm.cpp $ */
/** @file
* VBox disassembler - Disassemble and optionally format.
*/
/*
* Copyright (C) 2006-2022 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 *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_DIS
#include <VBox/dis.h>
#include <VBox/disopcode.h>
#include <iprt/errcore.h>
#include <iprt/assert.h>
#include <iprt/string.h>
#include "DisasmInternal.h"
/**
* Disassembles one instruction
*
* @returns VBox error code
* @param pvInstr Pointer to the instruction to disassemble.
* @param enmCpuMode The CPU state.
* @param pDis The disassembler state (output).
* @param pcbInstr Where to store the size of the instruction. NULL is
* allowed.
* @param pszOutput Storage for disassembled instruction
* @param cbOutput Size of the output buffer.
*
* @todo Define output callback.
*/
DISDECL(int) DISInstrToStr(void const *pvInstr, DISCPUMODE enmCpuMode, PDISSTATE pDis, uint32_t *pcbInstr,
char *pszOutput, size_t cbOutput)
{
return DISInstrToStrEx((uintptr_t)pvInstr, enmCpuMode, NULL, NULL, DISOPTYPE_ALL,
pDis, pcbInstr, pszOutput, cbOutput);
}
/**
* Disassembles one instruction with a byte fetcher caller.
*
* @returns VBox error code
* @param uInstrAddr Pointer to the structure to disassemble.
* @param enmCpuMode The CPU mode.
* @param pfnCallback The byte fetcher callback.
* @param pvUser The user argument (found in
* DISSTATE::pvUser).
* @param pDis The disassembler state (output).
* @param pcbInstr Where to store the size of the instruction. NULL is
* allowed.
* @param pszOutput Storage for disassembled instruction.
* @param cbOutput Size of the output buffer.
*
* @todo Define output callback.
*/
DISDECL(int) DISInstrToStrWithReader(RTUINTPTR uInstrAddr, DISCPUMODE enmCpuMode, PFNDISREADBYTES pfnReadBytes, void *pvUser,
PDISSTATE pDis, uint32_t *pcbInstr, char *pszOutput, size_t cbOutput)
{
return DISInstrToStrEx(uInstrAddr, enmCpuMode, pfnReadBytes, pvUser, DISOPTYPE_ALL,
pDis, pcbInstr, pszOutput, cbOutput);
}
/**
* Disassembles one instruction; only fully disassembly an instruction if it matches the filter criteria
*
* @returns VBox error code
* @param uInstrAddr Pointer to the structure to disassemble.
* @param enmCpuMode The CPU mode.
* @param pfnCallback The byte fetcher callback.
* @param uFilter Instruction filter.
* @param pDis Where to return the disassembled instruction info.
* @param pcbInstr Where to store the size of the instruction. NULL is
* allowed.
* @param pszOutput Storage for disassembled instruction.
* @param cbOutput Size of the output buffer.
*
* @todo Define output callback.
*/
DISDECL(int) DISInstrToStrEx(RTUINTPTR uInstrAddr, DISCPUMODE enmCpuMode,
PFNDISREADBYTES pfnReadBytes, void *pvUser, uint32_t uFilter,
PDISSTATE pDis, uint32_t *pcbInstr, char *pszOutput, size_t cbOutput)
{
/* Don't filter if formatting is desired. */
if (uFilter != DISOPTYPE_ALL && pszOutput && cbOutput)
uFilter = DISOPTYPE_ALL;
int rc = DISInstrEx(uInstrAddr, enmCpuMode, uFilter, pfnReadBytes, pvUser, pDis, pcbInstr);
if (RT_SUCCESS(rc) && pszOutput && cbOutput)
{
size_t cch = DISFormatYasmEx(pDis, pszOutput, cbOutput,
DIS_FMT_FLAGS_BYTES_LEFT | DIS_FMT_FLAGS_BYTES_BRACKETS | DIS_FMT_FLAGS_BYTES_SPACED
| DIS_FMT_FLAGS_RELATIVE_BRANCH | DIS_FMT_FLAGS_ADDR_LEFT,
NULL /*pfnGetSymbol*/, NULL /*pvUser*/);
if (cch + 2 <= cbOutput)
{
pszOutput[cch++] = '\n';
pszOutput[cch] = '\0';
}
}
return rc;
}
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