1 files changed, 126 insertions, 0 deletions
diff --git a/src/VBox/Disassembler/Disasm.cpp b/src/VBox/Disassembler/Disasm.cpp
new file mode 100644
index 00000000..734cbfb0
--- /dev/null
+++ b/src/VBox/Disassembler/Disasm.cpp
@@ -0,0 +1,126 @@
+/* $Id: Disasm.cpp $ */
+/** @file
+ * VBox disassembler - Disassemble and optionally format.
+ */
+
+/*
+ * Copyright (C) 2006-2023 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                                                                                                                 *
+*********************************************************************************************************************************/
+#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;
+}
+