/* $Id: DBGFDisas.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */ /** @file * DBGF - Debugger Facility, Disassembler. */ /* * 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 . * * SPDX-License-Identifier: GPL-3.0-only */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP LOG_GROUP_DBGF #include #include #include #include #include #include #include "DBGFInternal.h" #include #include #include #include #include #include #include #include #include #include /********************************************************************************************************************************* * Structures and Typedefs * *********************************************************************************************************************************/ /** * Structure used when disassembling and instructions in DBGF. * This is used so the reader function can get the stuff it needs. */ typedef struct { /** The core structure. */ DISCPUSTATE Cpu; /** The cross context VM structure. */ PVM pVM; /** The cross context virtual CPU structure. */ PVMCPU pVCpu; /** The address space for resolving symbol. */ RTDBGAS hDbgAs; /** Pointer to the first byte in the segment. */ RTGCUINTPTR GCPtrSegBase; /** Pointer to the byte after the end of the segment. (might have wrapped!) */ RTGCUINTPTR GCPtrSegEnd; /** The size of the segment minus 1. */ RTGCUINTPTR cbSegLimit; /** The guest paging mode. */ PGMMODE enmMode; /** Pointer to the current page - R3 Ptr. */ void const *pvPageR3; /** Pointer to the current page - GC Ptr. */ RTGCPTR GCPtrPage; /** Pointer to the next instruction (relative to GCPtrSegBase). */ RTGCUINTPTR GCPtrNext; /** The lock information that PGMPhysReleasePageMappingLock needs. */ PGMPAGEMAPLOCK PageMapLock; /** Whether the PageMapLock is valid or not. */ bool fLocked; /** 64 bits mode or not. */ bool f64Bits; } DBGFDISASSTATE, *PDBGFDISASSTATE; /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ static FNDISREADBYTES dbgfR3DisasInstrRead; /** * Calls the disassembler with the proper reader functions and such for disa * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pSelInfo The selector info. * @param enmMode The guest paging mode. * @param fFlags DBGF_DISAS_FLAGS_XXX. * @param GCPtr The GC pointer (selector offset). * @param pState The disas CPU state. */ static int dbgfR3DisasInstrFirst(PVM pVM, PVMCPU pVCpu, PDBGFSELINFO pSelInfo, PGMMODE enmMode, RTGCPTR GCPtr, uint32_t fFlags, PDBGFDISASSTATE pState) { pState->GCPtrSegBase = pSelInfo->GCPtrBase; pState->GCPtrSegEnd = pSelInfo->cbLimit + 1 + (RTGCUINTPTR)pSelInfo->GCPtrBase; pState->cbSegLimit = pSelInfo->cbLimit; pState->enmMode = enmMode; pState->GCPtrPage = 0; pState->pvPageR3 = NULL; pState->hDbgAs = DBGF_AS_GLOBAL; pState->pVM = pVM; pState->pVCpu = pVCpu; pState->fLocked = false; pState->f64Bits = enmMode >= PGMMODE_AMD64 && pSelInfo->u.Raw.Gen.u1Long; DISCPUMODE enmCpuMode; switch (fFlags & DBGF_DISAS_FLAGS_MODE_MASK) { default: AssertFailed(); RT_FALL_THRU(); case DBGF_DISAS_FLAGS_DEFAULT_MODE: enmCpuMode = pState->f64Bits ? DISCPUMODE_64BIT : pSelInfo->u.Raw.Gen.u1DefBig ? DISCPUMODE_32BIT : DISCPUMODE_16BIT; break; case DBGF_DISAS_FLAGS_16BIT_MODE: case DBGF_DISAS_FLAGS_16BIT_REAL_MODE: enmCpuMode = DISCPUMODE_16BIT; break; case DBGF_DISAS_FLAGS_32BIT_MODE: enmCpuMode = DISCPUMODE_32BIT; break; case DBGF_DISAS_FLAGS_64BIT_MODE: enmCpuMode = DISCPUMODE_64BIT; break; } uint32_t cbInstr; int rc = DISInstrWithReader(GCPtr, enmCpuMode, dbgfR3DisasInstrRead, &pState->Cpu, &pState->Cpu, &cbInstr); if (RT_SUCCESS(rc)) { pState->GCPtrNext = GCPtr + cbInstr; return VINF_SUCCESS; } /* cleanup */ if (pState->fLocked) { PGMPhysReleasePageMappingLock(pVM, &pState->PageMapLock); pState->fLocked = false; } return rc; } #if 0 /** * Calls the disassembler for disassembling the next instruction. * * @returns VBox status code. * @param pState The disas CPU state. */ static int dbgfR3DisasInstrNext(PDBGFDISASSTATE pState) { uint32_t cbInstr; int rc = DISInstr(&pState->Cpu, (void *)pState->GCPtrNext, 0, &cbInstr, NULL); if (RT_SUCCESS(rc)) { pState->GCPtrNext = GCPtr + cbInstr; return VINF_SUCCESS; } return rc; } #endif /** * Done with the disassembler state, free associated resources. * * @param pState The disas CPU state ++. */ static void dbgfR3DisasInstrDone(PDBGFDISASSTATE pState) { if (pState->fLocked) { PGMPhysReleasePageMappingLock(pState->pVM, &pState->PageMapLock); pState->fLocked = false; } } /** * @callback_method_impl{FNDISREADBYTES} * * @remarks The source is relative to the base address indicated by * DBGFDISASSTATE::GCPtrSegBase. */ static DECLCALLBACK(int) dbgfR3DisasInstrRead(PDISCPUSTATE pDis, uint8_t offInstr, uint8_t cbMinRead, uint8_t cbMaxRead) { PDBGFDISASSTATE pState = (PDBGFDISASSTATE)pDis; for (;;) { RTGCUINTPTR GCPtr = pDis->uInstrAddr + offInstr + pState->GCPtrSegBase; /* * Need to update the page translation? */ if ( !pState->pvPageR3 || (GCPtr >> GUEST_PAGE_SHIFT) != (pState->GCPtrPage >> GUEST_PAGE_SHIFT)) { int rc = VINF_SUCCESS; /* translate the address */ pState->GCPtrPage = GCPtr & ~(RTGCPTR)GUEST_PAGE_OFFSET_MASK; if (pState->fLocked) PGMPhysReleasePageMappingLock(pState->pVM, &pState->PageMapLock); if (pState->enmMode <= PGMMODE_PROTECTED) rc = PGMPhysGCPhys2CCPtrReadOnly(pState->pVM, pState->GCPtrPage, &pState->pvPageR3, &pState->PageMapLock); else rc = PGMPhysGCPtr2CCPtrReadOnly(pState->pVCpu, pState->GCPtrPage, &pState->pvPageR3, &pState->PageMapLock); if (RT_SUCCESS(rc)) pState->fLocked = true; else { pState->fLocked = false; pState->pvPageR3 = NULL; return rc; } } /* * Check the segment limit. */ if (!pState->f64Bits && pDis->uInstrAddr + offInstr > pState->cbSegLimit) return VERR_OUT_OF_SELECTOR_BOUNDS; /* * Calc how much we can read, maxing out the read. */ uint32_t cb = GUEST_PAGE_SIZE - (GCPtr & GUEST_PAGE_OFFSET_MASK); if (!pState->f64Bits) { RTGCUINTPTR cbSeg = pState->GCPtrSegEnd - GCPtr; if (cb > cbSeg && cbSeg) cb = cbSeg; } if (cb > cbMaxRead) cb = cbMaxRead; /* * Read and advance, */ memcpy(&pDis->abInstr[offInstr], (char *)pState->pvPageR3 + (GCPtr & GUEST_PAGE_OFFSET_MASK), cb); offInstr += (uint8_t)cb; if (cb >= cbMinRead) { pDis->cbCachedInstr = offInstr; return VINF_SUCCESS; } cbMaxRead -= (uint8_t)cb; cbMinRead -= (uint8_t)cb; } } /** * @callback_method_impl{FNDISGETSYMBOL} */ static DECLCALLBACK(int) dbgfR3DisasGetSymbol(PCDISCPUSTATE pDis, uint32_t u32Sel, RTUINTPTR uAddress, char *pszBuf, size_t cchBuf, RTINTPTR *poff, void *pvUser) { PDBGFDISASSTATE pState = (PDBGFDISASSTATE)pDis; PCDBGFSELINFO pSelInfo = (PCDBGFSELINFO)pvUser; /* * Address conversion */ DBGFADDRESS Addr; int rc; /* Start with CS. */ if ( DIS_FMT_SEL_IS_REG(u32Sel) ? DIS_FMT_SEL_GET_REG(u32Sel) == DISSELREG_CS : pSelInfo->Sel == DIS_FMT_SEL_GET_VALUE(u32Sel)) rc = DBGFR3AddrFromSelInfoOff(pState->pVM->pUVM, &Addr, pSelInfo, uAddress); /* In long mode everything but FS and GS is easy. */ else if ( pState->Cpu.uCpuMode == DISCPUMODE_64BIT && DIS_FMT_SEL_IS_REG(u32Sel) && DIS_FMT_SEL_GET_REG(u32Sel) != DISSELREG_GS && DIS_FMT_SEL_GET_REG(u32Sel) != DISSELREG_FS) { DBGFR3AddrFromFlat(pState->pVM->pUVM, &Addr, uAddress); rc = VINF_SUCCESS; } /* Here's a quick hack to catch patch manager SS relative access. */ else if ( DIS_FMT_SEL_IS_REG(u32Sel) && DIS_FMT_SEL_GET_REG(u32Sel) == DISSELREG_SS && pSelInfo->GCPtrBase == 0 && pSelInfo->cbLimit >= UINT32_MAX) { DBGFR3AddrFromFlat(pState->pVM->pUVM, &Addr, uAddress); rc = VINF_SUCCESS; } else { /** @todo implement a generic solution here. */ rc = VERR_SYMBOL_NOT_FOUND; } /* * If we got an address, try resolve it into a symbol. */ if (RT_SUCCESS(rc)) { RTDBGSYMBOL Sym; RTGCINTPTR off; rc = DBGFR3AsSymbolByAddr(pState->pVM->pUVM, pState->hDbgAs, &Addr, RTDBGSYMADDR_FLAGS_LESS_OR_EQUAL | RTDBGSYMADDR_FLAGS_SKIP_ABS_IN_DEFERRED, &off, &Sym, NULL /*phMod*/); if (RT_SUCCESS(rc)) { /* * Return the symbol and offset. */ size_t cchName = strlen(Sym.szName); if (cchName >= cchBuf) cchName = cchBuf - 1; memcpy(pszBuf, Sym.szName, cchName); pszBuf[cchName] = '\0'; *poff = off; } } return rc; } /** * Disassembles the one instruction according to the specified flags and * address, internal worker executing on the EMT of the specified virtual CPU. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param Sel The code selector. This used to determine the 32/16 bit ness and * calculation of the actual instruction address. * @param pGCPtr Pointer to the variable holding the code address * relative to the base of Sel. * @param fFlags Flags controlling where to start and how to format. * A combination of the DBGF_DISAS_FLAGS_* \#defines. * @param pszOutput Output buffer. * @param cbOutput Size of the output buffer. * @param pcbInstr Where to return the size of the instruction. * @param pDisState Where to store the disassembler state into. */ static DECLCALLBACK(int) dbgfR3DisasInstrExOnVCpu(PVM pVM, PVMCPU pVCpu, RTSEL Sel, PRTGCPTR pGCPtr, uint32_t fFlags, char *pszOutput, uint32_t cbOutput, uint32_t *pcbInstr, PDBGFDISSTATE pDisState) { VMCPU_ASSERT_EMT(pVCpu); RTGCPTR GCPtr = *pGCPtr; int rc; /* * Get the Sel and GCPtr if fFlags requests that. */ PCCPUMCTX pCtx = CPUMQueryGuestCtxPtr(pVCpu); PCCPUMSELREG pSRegCS = NULL; if (fFlags & DBGF_DISAS_FLAGS_CURRENT_GUEST) { Sel = pCtx->cs.Sel; pSRegCS = &pCtx->cs; GCPtr = pCtx->rip; } /* * Check if the selector matches the guest CS, use the hidden * registers from that if they are valid. Saves time and effort. */ else { if (pCtx->cs.Sel == Sel && Sel != DBGF_SEL_FLAT) pSRegCS = &pCtx->cs; else pCtx = NULL; } /* * Read the selector info - assume no stale selectors and nasty stuff like that. * * Note! We CANNOT load invalid hidden selector registers since that would * mean that log/debug statements or the debug will influence the * guest state and make things behave differently. */ DBGFSELINFO SelInfo; const PGMMODE enmMode = PGMGetGuestMode(pVCpu); bool fRealModeAddress = false; if ( pSRegCS && CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, pSRegCS)) { SelInfo.Sel = Sel; SelInfo.SelGate = 0; SelInfo.GCPtrBase = pSRegCS->u64Base; SelInfo.cbLimit = pSRegCS->u32Limit; SelInfo.fFlags = PGMMODE_IS_LONG_MODE(enmMode) ? DBGFSELINFO_FLAGS_LONG_MODE : enmMode != PGMMODE_REAL && !pCtx->eflags.Bits.u1VM ? DBGFSELINFO_FLAGS_PROT_MODE : DBGFSELINFO_FLAGS_REAL_MODE; SelInfo.u.Raw.au32[0] = 0; SelInfo.u.Raw.au32[1] = 0; SelInfo.u.Raw.Gen.u16LimitLow = 0xffff; SelInfo.u.Raw.Gen.u4LimitHigh = 0xf; SelInfo.u.Raw.Gen.u1Present = pSRegCS->Attr.n.u1Present; SelInfo.u.Raw.Gen.u1Granularity = pSRegCS->Attr.n.u1Granularity;; SelInfo.u.Raw.Gen.u1DefBig = pSRegCS->Attr.n.u1DefBig; SelInfo.u.Raw.Gen.u1Long = pSRegCS->Attr.n.u1Long; SelInfo.u.Raw.Gen.u1DescType = pSRegCS->Attr.n.u1DescType; SelInfo.u.Raw.Gen.u4Type = pSRegCS->Attr.n.u4Type; fRealModeAddress = !!(SelInfo.fFlags & DBGFSELINFO_FLAGS_REAL_MODE); } else if (Sel == DBGF_SEL_FLAT) { SelInfo.Sel = Sel; SelInfo.SelGate = 0; SelInfo.GCPtrBase = 0; SelInfo.cbLimit = ~(RTGCUINTPTR)0; SelInfo.fFlags = PGMMODE_IS_LONG_MODE(enmMode) ? DBGFSELINFO_FLAGS_LONG_MODE : enmMode != PGMMODE_REAL ? DBGFSELINFO_FLAGS_PROT_MODE : DBGFSELINFO_FLAGS_REAL_MODE; SelInfo.u.Raw.au32[0] = 0; SelInfo.u.Raw.au32[1] = 0; SelInfo.u.Raw.Gen.u16LimitLow = 0xffff; SelInfo.u.Raw.Gen.u4LimitHigh = 0xf; pSRegCS = &CPUMQueryGuestCtxPtr(pVCpu)->cs; if (CPUMSELREG_ARE_HIDDEN_PARTS_VALID(pVCpu, pSRegCS)) { /* Assume the current CS defines the execution mode. */ SelInfo.u.Raw.Gen.u1Present = pSRegCS->Attr.n.u1Present; SelInfo.u.Raw.Gen.u1Granularity = pSRegCS->Attr.n.u1Granularity;; SelInfo.u.Raw.Gen.u1DefBig = pSRegCS->Attr.n.u1DefBig; SelInfo.u.Raw.Gen.u1Long = pSRegCS->Attr.n.u1Long; SelInfo.u.Raw.Gen.u1DescType = pSRegCS->Attr.n.u1DescType; SelInfo.u.Raw.Gen.u4Type = pSRegCS->Attr.n.u4Type; } else { pSRegCS = NULL; SelInfo.u.Raw.Gen.u1Present = 1; SelInfo.u.Raw.Gen.u1Granularity = 1; SelInfo.u.Raw.Gen.u1DefBig = 1; SelInfo.u.Raw.Gen.u1DescType = 1; SelInfo.u.Raw.Gen.u4Type = X86_SEL_TYPE_EO; } } else if ( (pCtx && pCtx->eflags.Bits.u1VM) || enmMode == PGMMODE_REAL || (fFlags & DBGF_DISAS_FLAGS_MODE_MASK) == DBGF_DISAS_FLAGS_16BIT_REAL_MODE) { /* V86 mode or real mode - real mode addressing */ SelInfo.Sel = Sel; SelInfo.SelGate = 0; SelInfo.GCPtrBase = Sel * 16; SelInfo.cbLimit = ~(RTGCUINTPTR)0; SelInfo.fFlags = DBGFSELINFO_FLAGS_REAL_MODE; SelInfo.u.Raw.au32[0] = 0; SelInfo.u.Raw.au32[1] = 0; SelInfo.u.Raw.Gen.u16LimitLow = 0xffff; SelInfo.u.Raw.Gen.u4LimitHigh = 0xf; SelInfo.u.Raw.Gen.u1Present = 1; SelInfo.u.Raw.Gen.u1Granularity = 1; SelInfo.u.Raw.Gen.u1DefBig = 0; /* 16 bits */ SelInfo.u.Raw.Gen.u1DescType = 1; SelInfo.u.Raw.Gen.u4Type = X86_SEL_TYPE_EO; fRealModeAddress = true; } else { rc = SELMR3GetSelectorInfo(pVCpu, Sel, &SelInfo); if (RT_FAILURE(rc)) { RTStrPrintf(pszOutput, cbOutput, "Sel=%04x -> %Rrc\n", Sel, rc); return rc; } } /* * Disassemble it. */ DBGFDISASSTATE State; rc = dbgfR3DisasInstrFirst(pVM, pVCpu, &SelInfo, enmMode, GCPtr, fFlags, &State); if (RT_FAILURE(rc)) { if (State.Cpu.cbCachedInstr) RTStrPrintf(pszOutput, cbOutput, "Disas -> %Rrc; %.*Rhxs\n", rc, (size_t)State.Cpu.cbCachedInstr, State.Cpu.abInstr); else RTStrPrintf(pszOutput, cbOutput, "Disas -> %Rrc\n", rc); return rc; } /* * Format it. */ char szBuf[512]; DISFormatYasmEx(&State.Cpu, szBuf, sizeof(szBuf), DIS_FMT_FLAGS_RELATIVE_BRANCH, fFlags & DBGF_DISAS_FLAGS_NO_SYMBOLS ? NULL : dbgfR3DisasGetSymbol, &SelInfo); /* * Print it to the user specified buffer. */ size_t cch; if (fFlags & DBGF_DISAS_FLAGS_NO_BYTES) { if (fFlags & DBGF_DISAS_FLAGS_NO_ADDRESS) cch = RTStrPrintf(pszOutput, cbOutput, "%s", szBuf); else if (fRealModeAddress) cch = RTStrPrintf(pszOutput, cbOutput, "%04x:%04x %s", Sel, (unsigned)GCPtr, szBuf); else if (Sel == DBGF_SEL_FLAT) { if (enmMode >= PGMMODE_AMD64) cch = RTStrPrintf(pszOutput, cbOutput, "%RGv %s", GCPtr, szBuf); else cch = RTStrPrintf(pszOutput, cbOutput, "%08RX32 %s", (uint32_t)GCPtr, szBuf); } else { if (enmMode >= PGMMODE_AMD64) cch = RTStrPrintf(pszOutput, cbOutput, "%04x:%RGv %s", Sel, GCPtr, szBuf); else cch = RTStrPrintf(pszOutput, cbOutput, "%04x:%08RX32 %s", Sel, (uint32_t)GCPtr, szBuf); } } else { uint32_t cbInstr = State.Cpu.cbInstr; uint8_t const *pabInstr = State.Cpu.abInstr; if (fFlags & DBGF_DISAS_FLAGS_NO_ADDRESS) cch = RTStrPrintf(pszOutput, cbOutput, "%.*Rhxs%*s %s", cbInstr, pabInstr, cbInstr < 8 ? (8 - cbInstr) * 3 : 0, "", szBuf); else if (fRealModeAddress) cch = RTStrPrintf(pszOutput, cbOutput, "%04x:%04x %.*Rhxs%*s %s", Sel, (unsigned)GCPtr, cbInstr, pabInstr, cbInstr < 8 ? (8 - cbInstr) * 3 : 0, "", szBuf); else if (Sel == DBGF_SEL_FLAT) { if (enmMode >= PGMMODE_AMD64) cch = RTStrPrintf(pszOutput, cbOutput, "%RGv %.*Rhxs%*s %s", GCPtr, cbInstr, pabInstr, cbInstr < 8 ? (8 - cbInstr) * 3 : 0, "", szBuf); else cch = RTStrPrintf(pszOutput, cbOutput, "%08RX32 %.*Rhxs%*s %s", (uint32_t)GCPtr, cbInstr, pabInstr, cbInstr < 8 ? (8 - cbInstr) * 3 : 0, "", szBuf); } else { if (enmMode >= PGMMODE_AMD64) cch = RTStrPrintf(pszOutput, cbOutput, "%04x:%RGv %.*Rhxs%*s %s", Sel, GCPtr, cbInstr, pabInstr, cbInstr < 8 ? (8 - cbInstr) * 3 : 0, "", szBuf); else cch = RTStrPrintf(pszOutput, cbOutput, "%04x:%08RX32 %.*Rhxs%*s %s", Sel, (uint32_t)GCPtr, cbInstr, pabInstr, cbInstr < 8 ? (8 - cbInstr) * 3 : 0, "", szBuf); } } if (pcbInstr) *pcbInstr = State.Cpu.cbInstr; if (pDisState) { pDisState->pCurInstr = State.Cpu.pCurInstr; pDisState->cbInstr = State.Cpu.cbInstr; pDisState->Param1 = State.Cpu.Param1; pDisState->Param2 = State.Cpu.Param2; pDisState->Param3 = State.Cpu.Param3; pDisState->Param4 = State.Cpu.Param4; } dbgfR3DisasInstrDone(&State); return VINF_SUCCESS; } /** * Disassembles the one instruction according to the specified flags and address * returning part of the disassembler state. * * @returns VBox status code. * @param pUVM The user mode VM handle. * @param idCpu The ID of virtual CPU. * @param pAddr The code address. * @param fFlags Flags controlling where to start and how to format. * A combination of the DBGF_DISAS_FLAGS_* \#defines. * @param pszOutput Output buffer. This will always be properly * terminated if @a cbOutput is greater than zero. * @param cbOutput Size of the output buffer. * @param pDisState The disassembler state to fill in. * * @remarks May have to switch to the EMT of the virtual CPU in order to do * address conversion. */ DECLHIDDEN(int) dbgfR3DisasInstrStateEx(PUVM pUVM, VMCPUID idCpu, PDBGFADDRESS pAddr, uint32_t fFlags, char *pszOutput, uint32_t cbOutput, PDBGFDISSTATE pDisState) { AssertReturn(cbOutput > 0, VERR_INVALID_PARAMETER); *pszOutput = '\0'; UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE); PVM pVM = pUVM->pVM; VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE); AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID); AssertReturn(!(fFlags & ~DBGF_DISAS_FLAGS_VALID_MASK), VERR_INVALID_PARAMETER); AssertReturn((fFlags & DBGF_DISAS_FLAGS_MODE_MASK) <= DBGF_DISAS_FLAGS_64BIT_MODE, VERR_INVALID_PARAMETER); /* * Optimize the common case where we're called on the EMT of idCpu since * we're using this all the time when logging. */ int rc; PVMCPU pVCpu = VMMGetCpu(pVM); if ( pVCpu && pVCpu->idCpu == idCpu) rc = dbgfR3DisasInstrExOnVCpu(pVM, pVCpu, pAddr->Sel, &pAddr->off, fFlags, pszOutput, cbOutput, NULL, pDisState); else rc = VMR3ReqPriorityCallWait(pVM, idCpu, (PFNRT)dbgfR3DisasInstrExOnVCpu, 9, pVM, VMMGetCpuById(pVM, idCpu), pAddr->Sel, &pAddr->off, fFlags, pszOutput, cbOutput, NULL, pDisState); return rc; } /** * Disassembles the one instruction according to the specified flags and address. * * @returns VBox status code. * @param pUVM The user mode VM handle. * @param idCpu The ID of virtual CPU. * @param Sel The code selector. This used to determine the 32/16 bit ness and * calculation of the actual instruction address. * @param GCPtr The code address relative to the base of Sel. * @param fFlags Flags controlling where to start and how to format. * A combination of the DBGF_DISAS_FLAGS_* \#defines. * @param pszOutput Output buffer. This will always be properly * terminated if @a cbOutput is greater than zero. * @param cbOutput Size of the output buffer. * @param pcbInstr Where to return the size of the instruction. * * @remarks May have to switch to the EMT of the virtual CPU in order to do * address conversion. */ VMMR3DECL(int) DBGFR3DisasInstrEx(PUVM pUVM, VMCPUID idCpu, RTSEL Sel, RTGCPTR GCPtr, uint32_t fFlags, char *pszOutput, uint32_t cbOutput, uint32_t *pcbInstr) { AssertReturn(cbOutput > 0, VERR_INVALID_PARAMETER); *pszOutput = '\0'; UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE); PVM pVM = pUVM->pVM; VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE); AssertReturn(idCpu < pUVM->cCpus, VERR_INVALID_CPU_ID); AssertReturn(!(fFlags & ~DBGF_DISAS_FLAGS_VALID_MASK), VERR_INVALID_PARAMETER); AssertReturn((fFlags & DBGF_DISAS_FLAGS_MODE_MASK) <= DBGF_DISAS_FLAGS_64BIT_MODE, VERR_INVALID_PARAMETER); /* * Optimize the common case where we're called on the EMT of idCpu since * we're using this all the time when logging. */ int rc; PVMCPU pVCpu = VMMGetCpu(pVM); if ( pVCpu && pVCpu->idCpu == idCpu) rc = dbgfR3DisasInstrExOnVCpu(pVM, pVCpu, Sel, &GCPtr, fFlags, pszOutput, cbOutput, pcbInstr, NULL); else rc = VMR3ReqPriorityCallWait(pVM, idCpu, (PFNRT)dbgfR3DisasInstrExOnVCpu, 9, pVM, VMMGetCpuById(pVM, idCpu), Sel, &GCPtr, fFlags, pszOutput, cbOutput, pcbInstr, NULL); return rc; } /** * Disassembles the current guest context instruction. * All registers and data will be displayed. Addresses will be attempted resolved to symbols. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. * @param pszOutput Output buffer. This will always be properly * terminated if @a cbOutput is greater than zero. * @param cbOutput Size of the output buffer. * @thread EMT(pVCpu) */ VMMR3_INT_DECL(int) DBGFR3DisasInstrCurrent(PVMCPU pVCpu, char *pszOutput, uint32_t cbOutput) { AssertReturn(cbOutput > 0, VERR_INVALID_PARAMETER); *pszOutput = '\0'; Assert(VMCPU_IS_EMT(pVCpu)); RTGCPTR GCPtr = 0; return dbgfR3DisasInstrExOnVCpu(pVCpu->pVMR3, pVCpu, 0, &GCPtr, DBGF_DISAS_FLAGS_CURRENT_GUEST | DBGF_DISAS_FLAGS_DEFAULT_MODE | DBGF_DISAS_FLAGS_ANNOTATE_PATCHED, pszOutput, cbOutput, NULL, NULL); } /** * Disassembles the current guest context instruction and writes it to the log. * All registers and data will be displayed. Addresses will be attempted resolved to symbols. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. * @param pszPrefix Short prefix string to the disassembly string. (optional) * @thread EMT(pVCpu) */ VMMR3DECL(int) DBGFR3DisasInstrCurrentLogInternal(PVMCPU pVCpu, const char *pszPrefix) { char szBuf[256]; szBuf[0] = '\0'; int rc = DBGFR3DisasInstrCurrent(pVCpu, &szBuf[0], sizeof(szBuf)); if (RT_FAILURE(rc)) RTStrPrintf(szBuf, sizeof(szBuf), "DBGFR3DisasInstrCurrentLog failed with rc=%Rrc\n", rc); if (pszPrefix && *pszPrefix) { if (pVCpu->CTX_SUFF(pVM)->cCpus > 1) RTLogPrintf("%s-CPU%u: %s\n", pszPrefix, pVCpu->idCpu, szBuf); else RTLogPrintf("%s: %s\n", pszPrefix, szBuf); } else RTLogPrintf("%s\n", szBuf); return rc; } /** * Disassembles the specified guest context instruction and writes it to the log. * Addresses will be attempted resolved to symbols. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure of the calling * EMT. * @param Sel The code selector. This used to determine the 32/16 * bit-ness and calculation of the actual instruction * address. * @param GCPtr The code address relative to the base of Sel. * @param pszPrefix Short prefix string to the disassembly string. * (optional) * @thread EMT(pVCpu) */ VMMR3DECL(int) DBGFR3DisasInstrLogInternal(PVMCPU pVCpu, RTSEL Sel, RTGCPTR GCPtr, const char *pszPrefix) { Assert(VMCPU_IS_EMT(pVCpu)); char szBuf[256]; RTGCPTR GCPtrTmp = GCPtr; int rc = dbgfR3DisasInstrExOnVCpu(pVCpu->pVMR3, pVCpu, Sel, &GCPtrTmp, DBGF_DISAS_FLAGS_DEFAULT_MODE, &szBuf[0], sizeof(szBuf), NULL, NULL); if (RT_FAILURE(rc)) RTStrPrintf(szBuf, sizeof(szBuf), "DBGFR3DisasInstrLog(, %RTsel, %RGv) failed with rc=%Rrc\n", Sel, GCPtr, rc); if (pszPrefix && *pszPrefix) { if (pVCpu->CTX_SUFF(pVM)->cCpus > 1) RTLogPrintf("%s-CPU%u: %s\n", pszPrefix, pVCpu->idCpu, szBuf); else RTLogPrintf("%s: %s\n", pszPrefix, szBuf); } else RTLogPrintf("%s\n", szBuf); return rc; }