VirtualBox

source: vbox/trunk/src/VBox/VMM/VMMR0/DBGFR0.cpp@ 7533

Last change on this file since 7533 was 5999, checked in by vboxsync, 17 years ago

The Giant CDDL Dual-License Header Change.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 4.8 KB
Line 
1/* $Id: DBGFR0.cpp 5999 2007-12-07 15:05:06Z vboxsync $ */
2/** @file
3 * DBGF - Debugger Facility, R0 part.
4 */
5
6/*
7 * Copyright (C) 2006-2007 innotek GmbH
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 */
17
18
19/*******************************************************************************
20* Header Files *
21*******************************************************************************/
22#include <VBox/dbgf.h>
23#include <VBox/selm.h>
24#include <VBox/log.h>
25#include "DBGFInternal.h"
26#include <VBox/vm.h>
27#include <VBox/err.h>
28#include <iprt/assert.h>
29
30
31
32/**
33 * \#DB (Debug event) handler.
34 *
35 * @returns VBox status code.
36 * VINF_SUCCESS means we completely handled this trap,
37 * other codes are passed execution to host context.
38 *
39 * @param pVM The VM handle.
40 * @param pRegFrame Pointer to the register frame for the trap.
41 * @param uDr6 The DR6 register value.
42 */
43DBGFR0DECL(int) DBGFR0Trap01Handler(PVM pVM, PCPUMCTXCORE pRegFrame, RTUINTREG uDr6)
44{
45 /** @todo Intel docs say that X86_DR6_BS has the highest priority... */
46 /*
47 * A breakpoint?
48 */
49 if (uDr6 & (X86_DR6_B0 | X86_DR6_B1 | X86_DR6_B2 | X86_DR6_B3))
50 {
51 Assert(X86_DR6_B0 == 1 && X86_DR6_B1 == 2 && X86_DR6_B2 == 4 && X86_DR6_B3 == 8);
52 for (unsigned iBp = 0; iBp < ELEMENTS(pVM->dbgf.s.aHwBreakpoints); iBp++)
53 {
54 if ( (uDr6 & RT_BIT(iBp))
55 && pVM->dbgf.s.aHwBreakpoints[iBp].enmType == DBGFBPTYPE_REG)
56 {
57 pVM->dbgf.s.iActiveBp = pVM->dbgf.s.aHwBreakpoints[iBp].iBp;
58 pVM->dbgf.s.fSingleSteppingRaw = false;
59 LogFlow(("DBGFR0Trap03Handler: hit hw breakpoint %d at %04x:%08x\n",
60 pVM->dbgf.s.aHwBreakpoints[iBp].iBp, pRegFrame->cs, pRegFrame->eip));
61
62 return VINF_EM_DBG_BREAKPOINT;
63 }
64 }
65 }
66
67 /*
68 * Single step?
69 * Are we single stepping or is it the guest?
70 */
71 if ( (uDr6 & X86_DR6_BS)
72 && (pVM->dbgf.s.fSingleSteppingRaw))
73 {
74 pVM->dbgf.s.fSingleSteppingRaw = false;
75 LogFlow(("DBGFR0Trap01Handler: single step at %04x:%08x\n", pRegFrame->cs, pRegFrame->eip));
76 return VINF_EM_DBG_STEPPED;
77 }
78
79 /*
80 * Currently we only implement single stepping in the guest,
81 * so we'll bitch if this is not a BS event.
82 */
83 AssertMsg(uDr6 & X86_DR6_BS, ("hey! we're not doing guest BPs yet! dr6=%RTreg %04x:%08\n",
84 uDr6, pRegFrame->cs, pRegFrame->eip));
85 /** @todo virtualize DRx. */
86 LogFlow(("DBGFR0Trap01Handler: guest debug event %RTreg at %04x:%08x!\n", uDr6, pRegFrame->cs, pRegFrame->eip));
87 return VINF_EM_RAW_GUEST_TRAP;
88}
89
90
91/**
92 * \#BP (Breakpoint) handler.
93 *
94 * @returns VBox status code.
95 * VINF_SUCCESS means we completely handled this trap,
96 * other codes are passed execution to host context.
97 *
98 * @param pVM The VM handle.
99 * @param pRegFrame Pointer to the register frame for the trap.
100 */
101DBGFR0DECL(int) DBGFR0Trap03Handler(PVM pVM, PCPUMCTXCORE pRegFrame)
102{
103 /*
104 * Get the trap address and look it up in the breakpoint table.
105 * Don't bother if we don't have any breakpoints.
106 */
107 if (pVM->dbgf.s.cBreakpoints > 0)
108 {
109 RTGCPTR pPc;
110 int rc = SELMValidateAndConvertCSAddr(pVM, pRegFrame->eflags, pRegFrame->ss, pRegFrame->cs, &pRegFrame->csHid,
111 (RTGCPTR)((RTGCUINTPTR)pRegFrame->eip - 1),
112 &pPc);
113 AssertRCReturn(rc, rc);
114
115 for (unsigned iBp = 0; iBp < ELEMENTS(pVM->dbgf.s.aBreakpoints); iBp++)
116 {
117 if ( pVM->dbgf.s.aBreakpoints[iBp].GCPtr == (RTGCUINTPTR)pPc
118 && pVM->dbgf.s.aBreakpoints[iBp].enmType == DBGFBPTYPE_INT3)
119 {
120 pVM->dbgf.s.aBreakpoints[iBp].cHits++;
121 pVM->dbgf.s.iActiveBp = pVM->dbgf.s.aBreakpoints[iBp].iBp;
122
123 LogFlow(("DBGFR0Trap03Handler: hit breakpoint %d at %RGv (%04x:%08x) cHits=0x%RX64\n",
124 pVM->dbgf.s.aBreakpoints[iBp].iBp, pPc, pRegFrame->cs, pRegFrame->eip,
125 pVM->dbgf.s.aBreakpoints[iBp].cHits));
126 return VINF_EM_DBG_BREAKPOINT;
127 }
128 }
129 }
130
131 return VINF_EM_RAW_GUEST_TRAP;
132}
133
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