DBGFGC.cpp revision f8bc6e0cfdb98674b2943201b81c135e29f12369
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * DBGF - Debugger Facility, GC part.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * Almost identical to DBGFR0.cpp, except for the fInHyper stuff.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * Copyright (C) 2006-2007 Sun Microsystems, Inc.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * available from http://www.virtualbox.org. This file is free software;
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * you can redistribute it and/or modify it under the terms of the GNU
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * General Public License (GPL) as published by the Free Software
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * Clara, CA 95054 USA or visit http://www.sun.com if you need
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * additional information or have any questions.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync/*******************************************************************************
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync* Header Files *
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync*******************************************************************************/
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * \#DB (Debug event) handler.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * @returns VBox status code.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * VINF_SUCCESS means we completely handled this trap,
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * other codes are passed execution to host context.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * @param pVM The VM handle.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * @param pVCpu The virtual CPU handle.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * @param pRegFrame Pointer to the register frame for the trap.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * @param uDr6 The DR6 register value.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsyncVMMRCDECL(int) DBGFGCTrap01Handler(PVM pVM, PVMCPU pVCpu, PCPUMCTXCORE pRegFrame, RTGCUINTREG uDr6)
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync const bool fInHyper = !(pRegFrame->ss & X86_SEL_RPL) && !pRegFrame->eflags.Bits.u1VM;
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync /** @todo Intel docs say that X86_DR6_BS has the highest priority... */
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * A breakpoint?
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync if (uDr6 & (X86_DR6_B0 | X86_DR6_B1 | X86_DR6_B2 | X86_DR6_B3))
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync Assert(X86_DR6_B0 == 1 && X86_DR6_B1 == 2 && X86_DR6_B2 == 4 && X86_DR6_B3 == 8);
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync for (unsigned iBp = 0; iBp < RT_ELEMENTS(pVM->dbgf.s.aHwBreakpoints); iBp++)
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync && pVM->dbgf.s.aHwBreakpoints[iBp].enmType == DBGFBPTYPE_REG)
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync pVCpu->dbgf.s.iActiveBp = pVM->dbgf.s.aHwBreakpoints[iBp].iBp;
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync LogFlow(("DBGFGCTrap03Handler: hit hw breakpoint %d at %04x:%08x\n",
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync pVM->dbgf.s.aHwBreakpoints[iBp].iBp, pRegFrame->cs, pRegFrame->eip));
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync return fInHyper ? VINF_EM_DBG_HYPER_BREAKPOINT : VINF_EM_DBG_BREAKPOINT;
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * Single step?
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * Are we single stepping or is it the guest?
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync LogFlow(("DBGFGCTrap01Handler: single step at %04x:%08x\n", pRegFrame->cs, pRegFrame->eip));
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync return fInHyper ? VINF_EM_DBG_HYPER_STEPPED : VINF_EM_DBG_STEPPED;
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * Currently we only implement single stepping in the guest,
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * so we'll bitch if this is not a BS event.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync AssertMsg(uDr6 & X86_DR6_BS, ("hey! we're not doing guest BPs yet! dr6=%RTreg %04x:%08x\n",
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync /** @todo virtualize DRx. */
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync LogFlow(("DBGFGCTrap01Handler: guest debug event %RTreg at %04x:%08x!\n", uDr6, pRegFrame->cs, pRegFrame->eip));
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync return fInHyper ? VERR_INTERNAL_ERROR : VINF_EM_RAW_GUEST_TRAP;
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * \#BP (Breakpoint) handler.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * @returns VBox status code.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * VINF_SUCCESS means we completely handled this trap,
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * other codes are passed execution to host context.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * @param pVM The VM handle.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * @param pVCpu The virtual CPU handle.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * @param pRegFrame Pointer to the register frame for the trap.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsyncVMMRCDECL(int) DBGFGCTrap03Handler(PVM pVM, PVMCPU pVCpu, PCPUMCTXCORE pRegFrame)
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * Get the trap address and look it up in the breakpoint table.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync * Don't bother if we don't have any breakpoints.
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync int rc = SELMValidateAndConvertCSAddr(pVM, pRegFrame->eflags, pRegFrame->ss, pRegFrame->cs, &pRegFrame->csHid,
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync for (unsigned iBp = 0; iBp < RT_ELEMENTS(pVM->dbgf.s.aBreakpoints); iBp++)
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync if ( pVM->dbgf.s.aBreakpoints[iBp].GCPtr == (RTGCUINTPTR)pPc
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync && pVM->dbgf.s.aBreakpoints[iBp].enmType == DBGFBPTYPE_INT3)
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync pVCpu->dbgf.s.iActiveBp = pVM->dbgf.s.aBreakpoints[iBp].iBp;
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync LogFlow(("DBGFGCTrap03Handler: hit breakpoint %d at %RGv (%04x:%08x) cHits=0x%RX64\n",
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync pVM->dbgf.s.aBreakpoints[iBp].iBp, pPc, pRegFrame->cs, pRegFrame->eip,
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync return !(pRegFrame->ss & X86_SEL_RPL) && !pRegFrame->eflags.Bits.u1VM
7847c123aebebc6d3d5c1406619cfba1ab6457c1vboxsync return !(pRegFrame->ss & X86_SEL_RPL) && !pRegFrame->eflags.Bits.u1VM