[31846] | 1 | /* $Id: DBGCGdbRemoteStub.cpp 103433 2024-02-19 12:11:34Z vboxsync $ */
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| 2 | /** @file
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| 3 | * DBGC - Debugger Console, GDB Remote Stub.
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| 4 | */
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| 5 |
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| 6 | /*
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[98103] | 7 | * Copyright (C) 2010-2023 Oracle and/or its affiliates.
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[31846] | 8 | *
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[96407] | 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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[31846] | 26 | */
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| 27 |
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| 28 |
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[57358] | 29 | /*********************************************************************************************************************************
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| 30 | * Header Files *
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| 31 | *********************************************************************************************************************************/
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[31846] | 32 | #include <VBox/dbg.h>
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[35346] | 33 | #include <VBox/vmm/dbgf.h>
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[84627] | 34 | #include <VBox/vmm/vmapi.h> /* VMR3GetVM() */
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| 35 | #include <VBox/vmm/hm.h> /* HMR3IsEnabled */
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| 36 | #include <VBox/vmm/nem.h> /* NEMR3IsEnabled */
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| 37 | #include <iprt/cdefs.h>
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| 38 | #include <iprt/err.h>
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[84694] | 39 | #include <iprt/list.h>
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[84627] | 40 | #include <iprt/mem.h>
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| 41 | #include <iprt/string.h>
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[31846] | 42 |
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[84627] | 43 | #include <stdlib.h>
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| 44 |
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| 45 | #include "DBGCInternal.h"
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| 46 |
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| 47 |
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| 48 | /*********************************************************************************************************************************
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| 49 | * Defined Constants And Macros *
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| 50 | *********************************************************************************************************************************/
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| 51 |
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| 52 | /** Character indicating the start of a packet. */
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| 53 | #define GDBSTUB_PKT_START '$'
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| 54 | /** Character indicating the end of a packet (excluding the checksum). */
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| 55 | #define GDBSTUB_PKT_END '#'
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| 56 | /** The escape character. */
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| 57 | #define GDBSTUB_PKT_ESCAPE '{'
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| 58 | /** The out-of-band interrupt character. */
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| 59 | #define GDBSTUB_OOB_INTERRUPT 0x03
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| 60 |
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| 61 |
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| 62 | /** Indicate support for the 'qXfer:features:read' packet to support the target description. */
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| 63 | #define GDBSTUBCTX_FEATURES_F_TGT_DESC RT_BIT(0)
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| 64 |
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| 65 |
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| 66 | /*********************************************************************************************************************************
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| 67 | * Structures and Typedefs *
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| 68 | *********************************************************************************************************************************/
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| 69 |
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| 70 | /**
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| 71 | * Trace point type.
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| 72 | */
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| 73 | typedef enum GDBSTUBTPTYPE
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| 74 | {
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| 75 | /** Invalid type, do not use. */
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| 76 | GDBSTUBTPTYPE_INVALID = 0,
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| 77 | /** An instruction software trace point. */
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| 78 | GDBSTUBTPTYPE_EXEC_SW,
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| 79 | /** An instruction hardware trace point. */
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| 80 | GDBSTUBTPTYPE_EXEC_HW,
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| 81 | /** A memory read trace point. */
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| 82 | GDBSTUBTPTYPE_MEM_READ,
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| 83 | /** A memory write trace point. */
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| 84 | GDBSTUBTPTYPE_MEM_WRITE,
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| 85 | /** A memory access trace point. */
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| 86 | GDBSTUBTPTYPE_MEM_ACCESS,
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| 87 | /** 32bit hack. */
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| 88 | GDBSTUBTPTYPE_32BIT_HACK = 0x7fffffff
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| 89 | } GDBSTUBTPTYPE;
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| 90 |
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| 91 |
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| 92 | /**
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| 93 | * GDB stub receive state.
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| 94 | */
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| 95 | typedef enum GDBSTUBRECVSTATE
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| 96 | {
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| 97 | /** Invalid state. */
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| 98 | GDBSTUBRECVSTATE_INVALID = 0,
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| 99 | /** Waiting for the start character. */
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| 100 | GDBSTUBRECVSTATE_PACKET_WAIT_FOR_START,
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| 101 | /** Reiceiving the packet body up until the END character. */
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| 102 | GDBSTUBRECVSTATE_PACKET_RECEIVE_BODY,
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| 103 | /** Receiving the checksum. */
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| 104 | GDBSTUBRECVSTATE_PACKET_RECEIVE_CHECKSUM,
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| 105 | /** Blow up the enum to 32bits for easier alignment of members in structs. */
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| 106 | GDBSTUBRECVSTATE_32BIT_HACK = 0x7fffffff
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| 107 | } GDBSTUBRECVSTATE;
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| 108 |
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| 109 |
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| 110 | /**
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[85367] | 111 | * GDB target register descriptor.
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| 112 | */
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| 113 | typedef struct GDBREGDESC
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| 114 | {
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| 115 | /** Register name. */
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| 116 | const char *pszName;
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| 117 | /** DBGF register index. */
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| 118 | DBGFREG enmReg;
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| 119 | /** Bitsize */
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| 120 | uint32_t cBits;
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| 121 | /** Type. */
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| 122 | const char *pszType;
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| 123 | /** Group. */
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| 124 | const char *pszGroup;
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| 125 | } GDBREGDESC;
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| 126 | /** Pointer to a GDB target register descriptor. */
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| 127 | typedef GDBREGDESC *PGDBREGDESC;
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| 128 | /** Pointer to a const GDB target register descriptor. */
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| 129 | typedef const GDBREGDESC *PCGDBREGDESC;
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| 130 |
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| 131 |
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| 132 | /**
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[84694] | 133 | * A tracepoint descriptor.
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| 134 | */
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| 135 | typedef struct GDBSTUBTP
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| 136 | {
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| 137 | /** List node for the list of tracepoints. */
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| 138 | RTLISTNODE NdTps;
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| 139 | /** The breakpoint number from the DBGF API. */
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| 140 | uint32_t iBp;
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| 141 | /** The tracepoint type for identification. */
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| 142 | GDBSTUBTPTYPE enmTpType;
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| 143 | /** The tracepoint address for identification. */
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| 144 | uint64_t GdbTgtAddr;
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| 145 | /** The tracepoint kind for identification. */
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| 146 | uint64_t uKind;
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| 147 | } GDBSTUBTP;
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| 148 | /** Pointer to a tracepoint. */
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| 149 | typedef GDBSTUBTP *PGDBSTUBTP;
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| 150 |
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| 151 |
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| 152 | /**
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[84627] | 153 | * GDB stub context data.
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| 154 | */
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| 155 | typedef struct GDBSTUBCTX
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| 156 | {
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| 157 | /** Internal debugger console data. */
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| 158 | DBGC Dbgc;
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| 159 | /** The current state when receiving a new packet. */
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| 160 | GDBSTUBRECVSTATE enmState;
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| 161 | /** Maximum number of bytes the packet buffer can hold. */
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| 162 | size_t cbPktBufMax;
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| 163 | /** Current offset into the packet buffer. */
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[84628] | 164 | size_t offPktBuf;
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[84627] | 165 | /** The size of the packet (minus the start, end characters and the checksum). */
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[84630] | 166 | size_t cbPkt;
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[84627] | 167 | /** Pointer to the packet buffer data. */
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| 168 | uint8_t *pbPktBuf;
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| 169 | /** Number of bytes left for the checksum. */
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| 170 | size_t cbChksumRecvLeft;
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| 171 | /** Send packet checksum. */
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| 172 | uint8_t uChkSumSend;
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| 173 | /** Feature flags supported we negotiated with the remote end. */
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| 174 | uint32_t fFeatures;
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| 175 | /** Pointer to the XML target description. */
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| 176 | char *pachTgtXmlDesc;
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| 177 | /** Size of the XML target description. */
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| 178 | size_t cbTgtXmlDesc;
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[85367] | 179 | /** Pointer to the selected GDB register set. */
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| 180 | PCGDBREGDESC paRegs;
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| 181 | /** Number of entries in the register set. */
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| 182 | uint32_t cRegs;
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[84627] | 183 | /** Flag whether the stub is in extended mode. */
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| 184 | bool fExtendedMode;
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[84653] | 185 | /** Flag whether was something was output using the 'O' packet since it was reset last. */
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| 186 | bool fOutput;
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[84694] | 187 | /** List of registered trace points.
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| 188 | * GDB removes breakpoints/watchpoints using the parameters they were
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| 189 | * registered with while we only use the BP number form DBGF internally.
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| 190 | * Means we have to track all registration so we can remove them later on. */
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| 191 | RTLISTANCHOR LstTps;
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[84707] | 192 | /** Flag whether a ThreadInfo query was started. */
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| 193 | bool fInThrdInfoQuery;
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| 194 | /** Next ID to return in the current ThreadInfo query. */
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| 195 | VMCPUID idCpuNextThrdInfoQuery;
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[84627] | 196 | } GDBSTUBCTX;
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| 197 | /** Pointer to the GDB stub context data. */
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| 198 | typedef GDBSTUBCTX *PGDBSTUBCTX;
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| 199 | /** Pointer to const GDB stub context data. */
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| 200 | typedef const GDBSTUBCTX *PCGDBSTUBCTX;
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| 201 | /** Pointer to a GDB stub context data pointer. */
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| 202 | typedef PGDBSTUBCTX *PPGDBSTUBCTX;
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| 203 |
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| 204 |
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| 205 | /**
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| 206 | * Specific query packet processor callback.
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| 207 | *
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| 208 | * @returns Status code.
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| 209 | * @param pThis The GDB stub context.
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[84629] | 210 | * @param pbVal Pointer to the remaining value.
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| 211 | * @param cbVal Size of the remaining value in bytes.
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[84627] | 212 | */
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[85121] | 213 | typedef DECLCALLBACKTYPE(int, FNGDBSTUBQPKTPROC,(PGDBSTUBCTX pThis, const uint8_t *pbVal, size_t cbVal));
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[84627] | 214 | typedef FNGDBSTUBQPKTPROC *PFNGDBSTUBQPKTPROC;
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| 215 |
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| 216 |
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| 217 | /**
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| 218 | * 'q' packet processor.
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| 219 | */
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| 220 | typedef struct GDBSTUBQPKTPROC
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| 221 | {
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| 222 | /** Name */
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| 223 | const char *pszName;
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| 224 | /** Length of name in characters (without \0 terminator). */
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| 225 | uint32_t cchName;
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| 226 | /** The callback to call for processing the particular query. */
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| 227 | PFNGDBSTUBQPKTPROC pfnProc;
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| 228 | } GDBSTUBQPKTPROC;
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| 229 | /** Pointer to a 'q' packet processor entry. */
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| 230 | typedef GDBSTUBQPKTPROC *PGDBSTUBQPKTPROC;
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| 231 | /** Pointer to a const 'q' packet processor entry. */
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| 232 | typedef const GDBSTUBQPKTPROC *PCGDBSTUBQPKTPROC;
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| 233 |
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| 234 |
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| 235 | /**
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| 236 | * 'v' packet processor.
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| 237 | */
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| 238 | typedef struct GDBSTUBVPKTPROC
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| 239 | {
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| 240 | /** Name */
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| 241 | const char *pszName;
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| 242 | /** Length of name in characters (without \0 terminator). */
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| 243 | uint32_t cchName;
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| 244 | /** Replay to a query packet (ends with ?). */
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| 245 | const char *pszReplyQ;
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| 246 | /** Length of the query reply (without \0 terminator). */
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| 247 | uint32_t cchReplyQ;
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| 248 | /** The callback to call for processing the particular query. */
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| 249 | PFNGDBSTUBQPKTPROC pfnProc;
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| 250 | } GDBSTUBVPKTPROC;
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| 251 | /** Pointer to a 'q' packet processor entry. */
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| 252 | typedef GDBSTUBVPKTPROC *PGDBSTUBVPKTPROC;
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| 253 | /** Pointer to a const 'q' packet processor entry. */
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| 254 | typedef const GDBSTUBVPKTPROC *PCGDBSTUBVPKTPROC;
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| 255 |
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| 256 |
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| 257 | /**
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| 258 | * Feature callback.
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| 259 | *
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| 260 | * @returns Status code.
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| 261 | * @param pThis The GDB stub context.
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| 262 | * @param pbVal Pointer to the value.
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| 263 | * @param cbVal Size of the value in bytes.
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| 264 | */
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[85121] | 265 | typedef DECLCALLBACKTYPE(int, FNGDBSTUBFEATHND,(PGDBSTUBCTX pThis, const uint8_t *pbVal, size_t cbVal));
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[84627] | 266 | typedef FNGDBSTUBFEATHND *PFNGDBSTUBFEATHND;
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| 267 |
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| 268 |
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| 269 | /**
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| 270 | * GDB feature descriptor.
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| 271 | */
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| 272 | typedef struct GDBSTUBFEATDESC
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| 273 | {
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| 274 | /** Feature name */
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| 275 | const char *pszName;
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| 276 | /** Length of the feature name in characters (without \0 terminator). */
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| 277 | uint32_t cchName;
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| 278 | /** The callback to call for processing the particular feature. */
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| 279 | PFNGDBSTUBFEATHND pfnHandler;
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| 280 | /** Flag whether the feature requires a value. */
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| 281 | bool fVal;
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| 282 | } GDBSTUBFEATDESC;
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| 283 | /** Pointer to a GDB feature descriptor. */
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| 284 | typedef GDBSTUBFEATDESC *PGDBSTUBFEATDESC;
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| 285 | /** Pointer to a const GDB feature descriptor. */
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| 286 | typedef const GDBSTUBFEATDESC *PCGDBSTUBFEATDESC;
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| 287 |
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| 288 |
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| 289 | /*********************************************************************************************************************************
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| 290 | * Internal Functions *
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| 291 | *********************************************************************************************************************************/
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| 292 |
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[84694] | 293 |
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[84627] | 294 | /**
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[84694] | 295 | * Tries to find a trace point with the given parameters in the list of registered trace points.
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| 296 | *
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| 297 | * @returns Pointer to the trace point registration record if found or NULL if none was found.
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| 298 | * @param pThis The GDB stub context.
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| 299 | * @param enmTpType The trace point type.
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| 300 | * @param GdbTgtAddr Target address given by GDB.
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| 301 | * @param uKind Trace point kind.
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| 302 | */
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| 303 | static PGDBSTUBTP dbgcGdbStubTpFind(PGDBSTUBCTX pThis, GDBSTUBTPTYPE enmTpType, uint64_t GdbTgtAddr, uint64_t uKind)
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| 304 | {
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| 305 | PGDBSTUBTP pTpCur = NULL;
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| 306 | RTListForEach(&pThis->LstTps, pTpCur, GDBSTUBTP, NdTps)
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| 307 | {
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| 308 | if ( pTpCur->enmTpType == enmTpType
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| 309 | && pTpCur->GdbTgtAddr == GdbTgtAddr
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| 310 | && pTpCur->uKind == uKind)
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| 311 | return pTpCur;
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| 312 | }
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| 313 |
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| 314 | return NULL;
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| 315 | }
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| 316 |
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| 317 |
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| 318 | /**
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| 319 | * Registers a new trace point.
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| 320 | *
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| 321 | * @returns VBox status code.
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| 322 | * @param pThis The GDB stub context.
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| 323 | * @param enmTpType The trace point type.
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| 324 | * @param GdbTgtAddr Target address given by GDB.
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| 325 | * @param uKind Trace point kind.
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| 326 | * @param iBp The internal DBGF breakpoint ID this trace point was registered with.
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| 327 | */
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| 328 | static int dbgcGdbStubTpRegister(PGDBSTUBCTX pThis, GDBSTUBTPTYPE enmTpType, uint64_t GdbTgtAddr, uint64_t uKind, uint32_t iBp)
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| 329 | {
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| 330 | int rc = VERR_ALREADY_EXISTS;
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| 331 |
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| 332 | /* Can't register a tracepoint with the same parameters twice or we can't decide whom to remove later on. */
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| 333 | PGDBSTUBTP pTp = dbgcGdbStubTpFind(pThis, enmTpType, GdbTgtAddr, uKind);
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| 334 | if (!pTp)
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| 335 | {
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| 336 | pTp = (PGDBSTUBTP)RTMemAllocZ(sizeof(*pTp));
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| 337 | if (pTp)
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| 338 | {
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| 339 | pTp->enmTpType = enmTpType;
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| 340 | pTp->GdbTgtAddr = GdbTgtAddr;
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| 341 | pTp->uKind = uKind;
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| 342 | pTp->iBp = iBp;
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| 343 | RTListAppend(&pThis->LstTps, &pTp->NdTps);
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| 344 | rc = VINF_SUCCESS;
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| 345 | }
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| 346 | else
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| 347 | rc = VERR_NO_MEMORY;
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| 348 | }
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| 349 |
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| 350 | return rc;
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| 351 | }
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| 352 |
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| 353 |
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| 354 | /**
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| 355 | * Deregisters the given trace point (needs to be unregistered from DBGF by the caller before).
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| 356 | *
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| 357 | * @param pTp The trace point to deregister.
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| 358 | */
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| 359 | static void dbgcGdbStubTpDeregister(PGDBSTUBTP pTp)
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| 360 | {
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| 361 | RTListNodeRemove(&pTp->NdTps);
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| 362 | RTMemFree(pTp);
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| 363 | }
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| 364 |
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| 365 |
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| 366 | /**
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[84627] | 367 | * Converts a given to the hexadecimal value if valid.
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| 368 | *
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| 369 | * @returns The hexadecimal value the given character represents 0-9,a-f,A-F or 0xff on error.
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| 370 | * @param ch The character to convert.
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| 371 | */
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| 372 | DECLINLINE(uint8_t) dbgcGdbStubCtxChrToHex(char ch)
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| 373 | {
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| 374 | if (ch >= '0' && ch <= '9')
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| 375 | return ch - '0';
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| 376 | if (ch >= 'A' && ch <= 'F')
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| 377 | return ch - 'A' + 0xa;
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| 378 | if (ch >= 'a' && ch <= 'f')
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| 379 | return ch - 'a' + 0xa;
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| 380 |
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| 381 | return 0xff;
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| 382 | }
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| 383 |
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| 384 |
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| 385 | /**
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| 386 | * Converts a 4bit hex number to the appropriate character.
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| 387 | *
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| 388 | * @returns Character representing the 4bit hex number.
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| 389 | * @param uHex The 4 bit hex number.
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| 390 | */
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| 391 | DECLINLINE(char) dbgcGdbStubCtxHexToChr(uint8_t uHex)
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| 392 | {
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| 393 | if (uHex < 0xa)
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| 394 | return '0' + uHex;
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| 395 | if (uHex <= 0xf)
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| 396 | return 'A' + uHex - 0xa;
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| 397 |
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| 398 | return 'X';
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| 399 | }
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| 400 |
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| 401 |
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| 402 | /**
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| 403 | * Wrapper for the I/O interface write callback.
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| 404 | *
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| 405 | * @returns Status code.
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| 406 | * @param pThis The GDB stub context.
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| 407 | * @param pvPkt The packet data to send.
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| 408 | * @param cbPkt Size of the packet in bytes.
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| 409 | */
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| 410 | DECLINLINE(int) dbgcGdbStubCtxWrite(PGDBSTUBCTX pThis, const void *pvPkt, size_t cbPkt)
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| 411 | {
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[86327] | 412 | return pThis->Dbgc.pIo->pfnWrite(pThis->Dbgc.pIo, pvPkt, cbPkt, NULL /*pcbWritten*/);
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[84627] | 413 | }
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| 414 |
|
---|
| 415 |
|
---|
| 416 | /**
|
---|
| 417 | * Starts transmission of a new reply packet.
|
---|
| 418 | *
|
---|
| 419 | * @returns Status code.
|
---|
| 420 | * @param pThis The GDB stub context.
|
---|
| 421 | */
|
---|
| 422 | static int dbgcGdbStubCtxReplySendBegin(PGDBSTUBCTX pThis)
|
---|
| 423 | {
|
---|
| 424 | pThis->uChkSumSend = 0;
|
---|
| 425 |
|
---|
| 426 | uint8_t chPktStart = GDBSTUB_PKT_START;
|
---|
| 427 | return dbgcGdbStubCtxWrite(pThis, &chPktStart, sizeof(chPktStart));
|
---|
| 428 | }
|
---|
| 429 |
|
---|
| 430 |
|
---|
| 431 | /**
|
---|
| 432 | * Sends the given data in the reply.
|
---|
| 433 | *
|
---|
| 434 | * @returns Status code.
|
---|
| 435 | * @param pThis The GDB stub context.
|
---|
[84628] | 436 | * @param pvReplyData The reply data to send.
|
---|
[84627] | 437 | * @param cbReplyData Size of the reply data in bytes.
|
---|
| 438 | */
|
---|
| 439 | static int dbgcGdbStubCtxReplySendData(PGDBSTUBCTX pThis, const void *pvReplyData, size_t cbReplyData)
|
---|
| 440 | {
|
---|
| 441 | /* Update checksum. */
|
---|
| 442 | const uint8_t *pbData = (const uint8_t *)pvReplyData;
|
---|
| 443 | for (uint32_t i = 0; i < cbReplyData; i++)
|
---|
| 444 | pThis->uChkSumSend += pbData[i];
|
---|
| 445 |
|
---|
| 446 | return dbgcGdbStubCtxWrite(pThis, pvReplyData, cbReplyData);
|
---|
| 447 | }
|
---|
| 448 |
|
---|
| 449 |
|
---|
| 450 | /**
|
---|
| 451 | * Finishes transmission of the current reply by sending the packet end character and the checksum.
|
---|
| 452 | *
|
---|
| 453 | * @returns Status code.
|
---|
| 454 | * @param pThis The GDB stub context.
|
---|
| 455 | */
|
---|
| 456 | static int dbgcGdbStubCtxReplySendEnd(PGDBSTUBCTX pThis)
|
---|
| 457 | {
|
---|
| 458 | uint8_t achPktEnd[3];
|
---|
| 459 |
|
---|
| 460 | achPktEnd[0] = GDBSTUB_PKT_END;
|
---|
| 461 | achPktEnd[1] = dbgcGdbStubCtxHexToChr(pThis->uChkSumSend >> 4);
|
---|
| 462 | achPktEnd[2] = dbgcGdbStubCtxHexToChr(pThis->uChkSumSend & 0xf);
|
---|
| 463 |
|
---|
| 464 | return dbgcGdbStubCtxWrite(pThis, &achPktEnd[0], sizeof(achPktEnd));
|
---|
| 465 | }
|
---|
| 466 |
|
---|
| 467 |
|
---|
| 468 | /**
|
---|
| 469 | * Sends the given reply packet, doing the framing, checksumming, etc. in one call.
|
---|
| 470 | *
|
---|
| 471 | * @returns Status code.
|
---|
| 472 | * @param pThis The GDB stub context.
|
---|
[84628] | 473 | * @param pvReplyPkt The reply packet to send.
|
---|
[84627] | 474 | * @param cbReplyPkt Size of the reply packet in bytes.
|
---|
| 475 | */
|
---|
| 476 | static int dbgcGdbStubCtxReplySend(PGDBSTUBCTX pThis, const void *pvReplyPkt, size_t cbReplyPkt)
|
---|
| 477 | {
|
---|
| 478 | int rc = dbgcGdbStubCtxReplySendBegin(pThis);
|
---|
| 479 | if (RT_SUCCESS(rc))
|
---|
| 480 | {
|
---|
| 481 | rc = dbgcGdbStubCtxReplySendData(pThis, pvReplyPkt, cbReplyPkt);
|
---|
| 482 | if (RT_SUCCESS(rc))
|
---|
| 483 | rc = dbgcGdbStubCtxReplySendEnd(pThis);
|
---|
| 484 | }
|
---|
| 485 |
|
---|
| 486 | return rc;
|
---|
| 487 | }
|
---|
| 488 |
|
---|
| 489 |
|
---|
| 490 | /**
|
---|
| 491 | * Encodes the given buffer as a hexstring string it into the given destination buffer.
|
---|
| 492 | *
|
---|
| 493 | * @returns Status code.
|
---|
| 494 | * @param pbDst Where store the resulting hex string on success.
|
---|
| 495 | * @param cbDst Size of the destination buffer in bytes.
|
---|
| 496 | * @param pvSrc The data to encode.
|
---|
| 497 | * @param cbSrc Number of bytes to encode.
|
---|
| 498 | */
|
---|
[84653] | 499 | DECLINLINE(int) dbgcGdbStubCtxEncodeBinaryAsHex(uint8_t *pbDst, size_t cbDst, const void *pvSrc, size_t cbSrc)
|
---|
[84627] | 500 | {
|
---|
| 501 | return RTStrPrintHexBytes((char *)pbDst, cbDst, pvSrc, cbSrc, RTSTRPRINTHEXBYTES_F_UPPER);
|
---|
| 502 | }
|
---|
| 503 |
|
---|
| 504 |
|
---|
| 505 | /**
|
---|
| 506 | * Decodes the given ASCII hexstring as binary data up until the given separator is found or the end of the string is reached.
|
---|
| 507 | *
|
---|
| 508 | * @returns Status code.
|
---|
| 509 | * @param pbBuf The buffer containing the hexstring to convert.
|
---|
| 510 | * @param cbBuf Size of the buffer in bytes.
|
---|
[84629] | 511 | * @param puVal Where to store the decoded integer.
|
---|
[84627] | 512 | * @param chSep The character to stop conversion at.
|
---|
| 513 | * @param ppbSep Where to store the pointer in the buffer where the separator was found, optional.
|
---|
| 514 | */
|
---|
| 515 | static int dbgcGdbStubCtxParseHexStringAsInteger(const uint8_t *pbBuf, size_t cbBuf, uint64_t *puVal, uint8_t chSep, const uint8_t **ppbSep)
|
---|
| 516 | {
|
---|
| 517 | uint64_t uVal = 0;
|
---|
| 518 |
|
---|
| 519 | while ( cbBuf
|
---|
| 520 | && *pbBuf != chSep)
|
---|
| 521 | {
|
---|
| 522 | uVal = uVal * 16 + dbgcGdbStubCtxChrToHex(*pbBuf++);
|
---|
| 523 | cbBuf--;
|
---|
| 524 | }
|
---|
| 525 |
|
---|
| 526 | *puVal = uVal;
|
---|
| 527 |
|
---|
| 528 | if (ppbSep)
|
---|
| 529 | *ppbSep = pbBuf;
|
---|
| 530 |
|
---|
| 531 | return VINF_SUCCESS;
|
---|
| 532 | }
|
---|
| 533 |
|
---|
| 534 |
|
---|
| 535 | /**
|
---|
| 536 | * Decodes the given ASCII hexstring as a byte buffer up until the given separator is found or the end of the string is reached.
|
---|
| 537 | *
|
---|
| 538 | * @returns Status code.
|
---|
| 539 | * @param pbBuf The buffer containing the hexstring to convert.
|
---|
| 540 | * @param cbBuf Size of the buffer in bytes.
|
---|
| 541 | * @param pvDst Where to store the decoded data.
|
---|
| 542 | * @param cbDst Maximum buffer size in bytes.
|
---|
| 543 | * @param pcbDecoded Where to store the number of consumed bytes from the input.
|
---|
| 544 | */
|
---|
| 545 | DECLINLINE(int) dbgcGdbStubCtxParseHexStringAsByteBuf(const uint8_t *pbBuf, size_t cbBuf, void *pvDst, size_t cbDst, size_t *pcbDecoded)
|
---|
| 546 | {
|
---|
| 547 | size_t cbDecode = RT_MIN(cbBuf, cbDst * 2);
|
---|
| 548 |
|
---|
| 549 | if (pcbDecoded)
|
---|
| 550 | *pcbDecoded = cbDecode;
|
---|
| 551 |
|
---|
| 552 | return RTStrConvertHexBytes((const char *)pbBuf, pvDst, cbDecode, 0 /* fFlags*/);
|
---|
| 553 | }
|
---|
| 554 |
|
---|
| 555 | #if 0 /*unused for now*/
|
---|
| 556 | /**
|
---|
| 557 | * Sends a 'OK' part of a reply packet only (packet start and end needs to be handled separately).
|
---|
| 558 | *
|
---|
| 559 | * @returns Status code.
|
---|
| 560 | * @param pThis The GDB stub context.
|
---|
| 561 | */
|
---|
| 562 | static int dbgcGdbStubCtxReplySendOkData(PGDBSTUBCTX pThis)
|
---|
| 563 | {
|
---|
| 564 | char achOk[2] = { 'O', 'K' };
|
---|
| 565 | return dbgcGdbStubCtxReplySendData(pThis, &achOk[0], sizeof(achOk));
|
---|
| 566 | }
|
---|
| 567 | #endif
|
---|
| 568 |
|
---|
| 569 |
|
---|
| 570 | /**
|
---|
| 571 | * Sends a 'OK' reply packet.
|
---|
| 572 | *
|
---|
| 573 | * @returns Status code.
|
---|
| 574 | * @param pThis The GDB stub context.
|
---|
| 575 | */
|
---|
| 576 | static int dbgcGdbStubCtxReplySendOk(PGDBSTUBCTX pThis)
|
---|
| 577 | {
|
---|
| 578 | char achOk[2] = { 'O', 'K' };
|
---|
| 579 | return dbgcGdbStubCtxReplySend(pThis, &achOk[0], sizeof(achOk));
|
---|
| 580 | }
|
---|
| 581 |
|
---|
| 582 | #if 0 /*unused for now*/
|
---|
| 583 | /**
|
---|
| 584 | * Sends a 'E NN' part of a reply packet only (packet start and end needs to be handled separately).
|
---|
| 585 | *
|
---|
| 586 | * @returns Status code.
|
---|
| 587 | * @param pThis The GDB stub context.
|
---|
| 588 | * @param uErr The error code to send.
|
---|
| 589 | */
|
---|
| 590 | static int dbgcGdbStubCtxReplySendErrData(PGDBSTUBCTX pThis, uint8_t uErr)
|
---|
| 591 | {
|
---|
| 592 | char achErr[3] = { 'E', 0, 0 };
|
---|
| 593 | achErr[1] = dbgcGdbStubCtxHexToChr(uErr >> 4);
|
---|
| 594 | achErr[2] = dbgcGdbStubCtxHexToChr(uErr & 0xf);
|
---|
| 595 | return dbgcGdbStubCtxReplySendData(pThis, &achErr[0], sizeof(achErr));
|
---|
| 596 | }
|
---|
| 597 | #endif
|
---|
| 598 |
|
---|
| 599 | /**
|
---|
| 600 | * Sends a 'E NN' reply packet.
|
---|
| 601 | *
|
---|
| 602 | * @returns Status code.
|
---|
| 603 | * @param pThis The GDB stub context.
|
---|
| 604 | * @param uErr The error code to send.
|
---|
| 605 | */
|
---|
| 606 | static int dbgcGdbStubCtxReplySendErr(PGDBSTUBCTX pThis, uint8_t uErr)
|
---|
| 607 | {
|
---|
| 608 | char achErr[3] = { 'E', 0, 0 };
|
---|
| 609 | achErr[1] = dbgcGdbStubCtxHexToChr(uErr >> 4);
|
---|
| 610 | achErr[2] = dbgcGdbStubCtxHexToChr(uErr & 0xf);
|
---|
| 611 | return dbgcGdbStubCtxReplySend(pThis, &achErr[0], sizeof(achErr));
|
---|
| 612 | }
|
---|
| 613 |
|
---|
| 614 |
|
---|
| 615 | /**
|
---|
| 616 | * Sends a signal trap (S 05) packet to indicate that the target has stopped.
|
---|
| 617 | *
|
---|
| 618 | * @returns Status code.
|
---|
| 619 | * @param pThis The GDB stub context.
|
---|
| 620 | */
|
---|
| 621 | static int dbgcGdbStubCtxReplySendSigTrap(PGDBSTUBCTX pThis)
|
---|
| 622 | {
|
---|
[84707] | 623 | char achReply[32];
|
---|
| 624 | ssize_t cchStr = RTStrPrintf2(&achReply[0], sizeof(achReply), "T05thread:%02x;", pThis->Dbgc.idCpu + 1);
|
---|
| 625 | return dbgcGdbStubCtxReplySend(pThis, &achReply[0], cchStr);
|
---|
[84627] | 626 | }
|
---|
| 627 |
|
---|
| 628 |
|
---|
| 629 | /**
|
---|
| 630 | * Sends a GDB stub status code indicating an error using the error reply packet.
|
---|
| 631 | *
|
---|
| 632 | * @returns Status code.
|
---|
| 633 | * @param pThis The GDB stub context.
|
---|
| 634 | * @param rc The status code to send.
|
---|
| 635 | */
|
---|
| 636 | static int dbgcGdbStubCtxReplySendErrSts(PGDBSTUBCTX pThis, int rc)
|
---|
| 637 | {
|
---|
| 638 | /** @todo convert error codes maybe. */
|
---|
| 639 | return dbgcGdbStubCtxReplySendErr(pThis, (-rc) & 0xff);
|
---|
| 640 | }
|
---|
| 641 |
|
---|
| 642 |
|
---|
| 643 | /**
|
---|
| 644 | * Ensures that there is at least the given amount of bytes of free space left in the packet buffer.
|
---|
| 645 | *
|
---|
| 646 | * @returns Status code (error when increasing the buffer failed).
|
---|
| 647 | * @param pThis The GDB stub context.
|
---|
| 648 | * @param cbSpace Number of bytes required.
|
---|
| 649 | */
|
---|
| 650 | static int dbgcGdbStubCtxEnsurePktBufSpace(PGDBSTUBCTX pThis, size_t cbSpace)
|
---|
| 651 | {
|
---|
| 652 | if (pThis->cbPktBufMax - pThis->offPktBuf >= cbSpace)
|
---|
| 653 | return VINF_SUCCESS;
|
---|
| 654 |
|
---|
| 655 | /* Slow path allocate new buffer and copy content over. */
|
---|
| 656 | int rc = VINF_SUCCESS;
|
---|
| 657 | size_t cbPktBufMaxNew = pThis->cbPktBufMax + cbSpace;
|
---|
| 658 | void *pvNew = RTMemRealloc(pThis->pbPktBuf, cbPktBufMaxNew);
|
---|
| 659 | if (pvNew)
|
---|
| 660 | {
|
---|
| 661 | pThis->pbPktBuf = (uint8_t *)pvNew;
|
---|
| 662 | pThis->cbPktBufMax = cbPktBufMaxNew;
|
---|
| 663 | }
|
---|
| 664 | else
|
---|
| 665 | rc = VERR_NO_MEMORY;
|
---|
| 666 |
|
---|
| 667 | return rc;
|
---|
| 668 | }
|
---|
| 669 |
|
---|
| 670 |
|
---|
| 671 | /**
|
---|
| 672 | * Parses the arguments of a 'Z' and 'z' packet.
|
---|
| 673 | *
|
---|
| 674 | * @returns Status code.
|
---|
| 675 | * @param pbArgs Pointer to the start of the first argument.
|
---|
| 676 | * @param cbArgs Number of argument bytes.
|
---|
| 677 | * @param penmTpType Where to store the tracepoint type on success.
|
---|
| 678 | * @param pGdbTgtAddr Where to store the address on success.
|
---|
| 679 | * @param puKind Where to store the kind argument on success.
|
---|
| 680 | */
|
---|
| 681 | static int dbgcGdbStubCtxParseTpPktArgs(const uint8_t *pbArgs, size_t cbArgs, GDBSTUBTPTYPE *penmTpType, uint64_t *pGdbTgtAddr, uint64_t *puKind)
|
---|
| 682 | {
|
---|
| 683 | const uint8_t *pbPktSep = NULL;
|
---|
| 684 | uint64_t uType = 0;
|
---|
| 685 |
|
---|
| 686 | int rc = dbgcGdbStubCtxParseHexStringAsInteger(pbArgs, cbArgs, &uType,
|
---|
| 687 | ',', &pbPktSep);
|
---|
| 688 | if (RT_SUCCESS(rc))
|
---|
| 689 | {
|
---|
| 690 | cbArgs -= (uintptr_t)(pbPktSep - pbArgs) - 1;
|
---|
| 691 | rc = dbgcGdbStubCtxParseHexStringAsInteger(pbPktSep + 1, cbArgs, pGdbTgtAddr,
|
---|
| 692 | ',', &pbPktSep);
|
---|
| 693 | if (RT_SUCCESS(rc))
|
---|
| 694 | {
|
---|
| 695 | cbArgs -= (uintptr_t)(pbPktSep - pbArgs) - 1;
|
---|
| 696 | rc = dbgcGdbStubCtxParseHexStringAsInteger(pbPktSep + 1, cbArgs, puKind,
|
---|
| 697 | GDBSTUB_PKT_END, NULL);
|
---|
| 698 | if (RT_SUCCESS(rc))
|
---|
| 699 | {
|
---|
| 700 | switch (uType)
|
---|
| 701 | {
|
---|
| 702 | case 0:
|
---|
| 703 | *penmTpType = GDBSTUBTPTYPE_EXEC_SW;
|
---|
| 704 | break;
|
---|
| 705 | case 1:
|
---|
| 706 | *penmTpType = GDBSTUBTPTYPE_EXEC_HW;
|
---|
| 707 | break;
|
---|
| 708 | case 2:
|
---|
| 709 | *penmTpType = GDBSTUBTPTYPE_MEM_WRITE;
|
---|
| 710 | break;
|
---|
| 711 | case 3:
|
---|
| 712 | *penmTpType = GDBSTUBTPTYPE_MEM_READ;
|
---|
| 713 | break;
|
---|
| 714 | case 4:
|
---|
| 715 | *penmTpType = GDBSTUBTPTYPE_MEM_ACCESS;
|
---|
| 716 | break;
|
---|
| 717 | default:
|
---|
| 718 | rc = VERR_INVALID_PARAMETER;
|
---|
| 719 | break;
|
---|
| 720 | }
|
---|
| 721 | }
|
---|
| 722 | }
|
---|
| 723 | }
|
---|
| 724 |
|
---|
| 725 | return rc;
|
---|
| 726 | }
|
---|
| 727 |
|
---|
| 728 |
|
---|
| 729 | /**
|
---|
| 730 | * Processes the 'TStatus' query.
|
---|
| 731 | *
|
---|
| 732 | * @returns Status code.
|
---|
| 733 | * @param pThis The GDB stub context.
|
---|
| 734 | * @param pbArgs Pointer to the start of the arguments in the packet.
|
---|
| 735 | * @param cbArgs Size of arguments in bytes.
|
---|
| 736 | */
|
---|
[85177] | 737 | static DECLCALLBACK(int) dbgcGdbStubCtxPktProcessQueryTStatus(PGDBSTUBCTX pThis, const uint8_t *pbArgs, size_t cbArgs)
|
---|
[84627] | 738 | {
|
---|
| 739 | RT_NOREF(pbArgs, cbArgs);
|
---|
| 740 |
|
---|
| 741 | char achReply[2] = { 'T', '0' };
|
---|
| 742 | return dbgcGdbStubCtxReplySend(pThis, &achReply[0], sizeof(achReply));
|
---|
| 743 | }
|
---|
| 744 |
|
---|
| 745 |
|
---|
| 746 | /**
|
---|
[84628] | 747 | * @copydoc FNGDBSTUBQPKTPROC
|
---|
[84627] | 748 | */
|
---|
[85177] | 749 | static DECLCALLBACK(int) dbgcGdbStubCtxPktProcessFeatXmlRegs(PGDBSTUBCTX pThis, const uint8_t *pbVal, size_t cbVal)
|
---|
[84627] | 750 | {
|
---|
| 751 | /*
|
---|
| 752 | * xmlRegisters contain a list of supported architectures delimited by ','.
|
---|
| 753 | * Check that the architecture is in the supported list.
|
---|
| 754 | */
|
---|
| 755 | while (cbVal)
|
---|
| 756 | {
|
---|
| 757 | /* Find the next delimiter. */
|
---|
| 758 | size_t cbThisVal = cbVal;
|
---|
| 759 | const uint8_t *pbDelim = (const uint8_t *)memchr(pbVal, ',', cbVal);
|
---|
| 760 | if (pbDelim)
|
---|
| 761 | cbThisVal = pbDelim - pbVal;
|
---|
| 762 |
|
---|
[85367] | 763 | const size_t cchArch64 = sizeof("i386:x86-64") - 1;
|
---|
| 764 | const size_t cchArch32 = sizeof("i386") - 1;
|
---|
| 765 | if ( !memcmp(pbVal, "i386:x86-64", RT_MIN(cbVal, cchArch64))
|
---|
| 766 | || !memcmp(pbVal, "i386", RT_MIN(cbVal, cchArch32)))
|
---|
[84627] | 767 | {
|
---|
| 768 | /* Set the flag to support the qXfer:features:read packet. */
|
---|
| 769 | pThis->fFeatures |= GDBSTUBCTX_FEATURES_F_TGT_DESC;
|
---|
| 770 | break;
|
---|
| 771 | }
|
---|
| 772 |
|
---|
| 773 | cbVal -= cbThisVal + (pbDelim ? 1 : 0);
|
---|
| 774 | pbVal = pbDelim + (pbDelim ? 1 : 0);
|
---|
| 775 | }
|
---|
| 776 |
|
---|
| 777 | return VINF_SUCCESS;
|
---|
| 778 | }
|
---|
| 779 |
|
---|
| 780 |
|
---|
| 781 | /**
|
---|
| 782 | * Features which can be reported by the remote GDB which we might support.
|
---|
| 783 | *
|
---|
| 784 | * @note The sorting matters for features which start the same, the longest must come first.
|
---|
| 785 | */
|
---|
| 786 | static const GDBSTUBFEATDESC g_aGdbFeatures[] =
|
---|
| 787 | {
|
---|
| 788 | #define GDBSTUBFEATDESC_INIT(a_Name, a_pfnHnd, a_fVal) { a_Name, sizeof(a_Name) - 1, a_pfnHnd, a_fVal }
|
---|
| 789 | GDBSTUBFEATDESC_INIT("xmlRegisters", dbgcGdbStubCtxPktProcessFeatXmlRegs, true),
|
---|
| 790 | #undef GDBSTUBFEATDESC_INIT
|
---|
| 791 | };
|
---|
| 792 |
|
---|
| 793 |
|
---|
| 794 | /**
|
---|
| 795 | * Calculates the feature length of the next feature pointed to by the given arguments buffer.
|
---|
| 796 | *
|
---|
| 797 | * @returns Status code.
|
---|
| 798 | * @param pbArgs Pointer to the start of the arguments in the packet.
|
---|
| 799 | * @param cbArgs Size of arguments in bytes.
|
---|
| 800 | * @param pcbArg Where to store the size of the argument in bytes on success (excluding the delimiter).
|
---|
| 801 | * @param pfTerminator Whereto store the flag whether the packet terminator (#) was seen as a delimiter.
|
---|
| 802 | */
|
---|
| 803 | static int dbgcGdbStubCtxQueryPktQueryFeatureLen(const uint8_t *pbArgs, size_t cbArgs, size_t *pcbArg, bool *pfTerminator)
|
---|
| 804 | {
|
---|
| 805 | const uint8_t *pbArgCur = pbArgs;
|
---|
| 806 |
|
---|
| 807 | while ( cbArgs
|
---|
| 808 | && *pbArgCur != ';'
|
---|
| 809 | && *pbArgCur != GDBSTUB_PKT_END)
|
---|
| 810 | {
|
---|
| 811 | cbArgs--;
|
---|
| 812 | pbArgCur++;
|
---|
| 813 | }
|
---|
| 814 |
|
---|
| 815 | if ( !cbArgs
|
---|
| 816 | && *pbArgCur != ';'
|
---|
| 817 | && *pbArgCur != GDBSTUB_PKT_END)
|
---|
| 818 | return VERR_NET_PROTOCOL_ERROR;
|
---|
| 819 |
|
---|
| 820 | *pcbArg = pbArgCur - pbArgs;
|
---|
| 821 | *pfTerminator = *pbArgCur == GDBSTUB_PKT_END ? true : false;
|
---|
| 822 |
|
---|
| 823 | return VINF_SUCCESS;
|
---|
| 824 | }
|
---|
| 825 |
|
---|
| 826 |
|
---|
| 827 | /**
|
---|
| 828 | * Sends the reply to the 'qSupported' packet.
|
---|
| 829 | *
|
---|
| 830 | * @returns Status code.
|
---|
| 831 | * @param pThis The GDB stub context.
|
---|
| 832 | */
|
---|
| 833 | static int dbgcGdbStubCtxPktProcessQuerySupportedReply(PGDBSTUBCTX pThis)
|
---|
| 834 | {
|
---|
| 835 | /** @todo Enhance. */
|
---|
| 836 | if (pThis->fFeatures & GDBSTUBCTX_FEATURES_F_TGT_DESC)
|
---|
[84707] | 837 | return dbgcGdbStubCtxReplySend(pThis, "qXfer:features:read+;vContSupported+", sizeof("qXfer:features:read+;vContSupported+") - 1);
|
---|
[84627] | 838 |
|
---|
| 839 | return dbgcGdbStubCtxReplySend(pThis, NULL, 0);
|
---|
| 840 | }
|
---|
| 841 |
|
---|
| 842 |
|
---|
| 843 | /**
|
---|
| 844 | * Processes the 'Supported' query.
|
---|
| 845 | *
|
---|
| 846 | * @returns Status code.
|
---|
| 847 | * @param pThis The GDB stub context.
|
---|
| 848 | * @param pbArgs Pointer to the start of the arguments in the packet.
|
---|
| 849 | * @param cbArgs Size of arguments in bytes.
|
---|
| 850 | */
|
---|
[85177] | 851 | static DECLCALLBACK(int) dbgcGdbStubCtxPktProcessQuerySupported(PGDBSTUBCTX pThis, const uint8_t *pbArgs, size_t cbArgs)
|
---|
[84627] | 852 | {
|
---|
| 853 | /* Skip the : following the qSupported start. */
|
---|
| 854 | if ( cbArgs < 1
|
---|
| 855 | || pbArgs[0] != ':')
|
---|
| 856 | return VERR_NET_PROTOCOL_ERROR;
|
---|
| 857 |
|
---|
| 858 | cbArgs--;
|
---|
| 859 | pbArgs++;
|
---|
| 860 |
|
---|
| 861 | /*
|
---|
| 862 | * Each feature but the last one are separated by ; and the last one is delimited by the # packet end symbol.
|
---|
| 863 | * We first determine the boundaries of the reported feature and pass it to the appropriate handler.
|
---|
| 864 | */
|
---|
| 865 | int rc = VINF_SUCCESS;
|
---|
| 866 | while ( cbArgs
|
---|
| 867 | && RT_SUCCESS(rc))
|
---|
| 868 | {
|
---|
| 869 | bool fTerminator = false;
|
---|
| 870 | size_t cbArg = 0;
|
---|
| 871 | rc = dbgcGdbStubCtxQueryPktQueryFeatureLen(pbArgs, cbArgs, &cbArg, &fTerminator);
|
---|
| 872 | if (RT_SUCCESS(rc))
|
---|
| 873 | {
|
---|
| 874 | /* Search for the feature handler. */
|
---|
| 875 | for (uint32_t i = 0; i < RT_ELEMENTS(g_aGdbFeatures); i++)
|
---|
| 876 | {
|
---|
| 877 | PCGDBSTUBFEATDESC pFeatDesc = &g_aGdbFeatures[i];
|
---|
| 878 |
|
---|
| 879 | if ( cbArg > pFeatDesc->cchName /* At least one character must come after the feature name ('+', '-' or '='). */
|
---|
| 880 | && !memcmp(pFeatDesc->pszName, pbArgs, pFeatDesc->cchName))
|
---|
| 881 | {
|
---|
| 882 | /* Found, execute handler after figuring out whether there is a value attached. */
|
---|
| 883 | const uint8_t *pbVal = pbArgs + pFeatDesc->cchName;
|
---|
| 884 | size_t cbVal = cbArg - pFeatDesc->cchName;
|
---|
| 885 |
|
---|
| 886 | if (pFeatDesc->fVal)
|
---|
| 887 | {
|
---|
| 888 | if ( *pbVal == '='
|
---|
| 889 | && cbVal > 1)
|
---|
| 890 | {
|
---|
| 891 | pbVal++;
|
---|
| 892 | cbVal--;
|
---|
| 893 | }
|
---|
| 894 | else
|
---|
| 895 | rc = VERR_NET_PROTOCOL_ERROR;
|
---|
| 896 | }
|
---|
| 897 | else if ( cbVal != 1
|
---|
| 898 | || ( *pbVal != '+'
|
---|
| 899 | && *pbVal != '-')) /* '+' and '-' are allowed to indicate support for a particular feature. */
|
---|
| 900 | rc = VERR_NET_PROTOCOL_ERROR;
|
---|
| 901 |
|
---|
| 902 | if (RT_SUCCESS(rc))
|
---|
| 903 | rc = pFeatDesc->pfnHandler(pThis, pbVal, cbVal);
|
---|
| 904 | break;
|
---|
| 905 | }
|
---|
| 906 | }
|
---|
| 907 |
|
---|
| 908 | cbArgs -= cbArg;
|
---|
| 909 | pbArgs += cbArg;
|
---|
| 910 | if (!fTerminator)
|
---|
| 911 | {
|
---|
| 912 | cbArgs--;
|
---|
| 913 | pbArgs++;
|
---|
| 914 | }
|
---|
| 915 | else
|
---|
| 916 | break;
|
---|
| 917 | }
|
---|
| 918 | }
|
---|
| 919 |
|
---|
| 920 | /* If everything went alright send the reply with our supported features. */
|
---|
| 921 | if (RT_SUCCESS(rc))
|
---|
| 922 | rc = dbgcGdbStubCtxPktProcessQuerySupportedReply(pThis);
|
---|
| 923 |
|
---|
| 924 | return rc;
|
---|
| 925 | }
|
---|
| 926 |
|
---|
| 927 |
|
---|
| 928 | /**
|
---|
[84628] | 929 | * Sends the reply to a 'qXfer:object:read:...' request.
|
---|
[84627] | 930 | *
|
---|
| 931 | * @returns Status code.
|
---|
| 932 | * @param pThis The GDB stub context.
|
---|
| 933 | * @param offRead Where to start reading from within the object.
|
---|
| 934 | * @param cbRead How much to read.
|
---|
| 935 | * @param pbObj The start of the object.
|
---|
| 936 | * @param cbObj Size of the object.
|
---|
| 937 | */
|
---|
| 938 | static int dbgcGdbStubCtxQueryXferReadReply(PGDBSTUBCTX pThis, uint32_t offRead, size_t cbRead, const uint8_t *pbObj, size_t cbObj)
|
---|
| 939 | {
|
---|
| 940 | int rc = VINF_SUCCESS;
|
---|
| 941 | if (offRead < cbObj)
|
---|
| 942 | {
|
---|
| 943 | /** @todo Escaping */
|
---|
| 944 | size_t cbThisRead = offRead + cbRead < cbObj ? cbRead : cbObj - offRead;
|
---|
| 945 |
|
---|
| 946 | rc = dbgcGdbStubCtxEnsurePktBufSpace(pThis, cbThisRead + 1);
|
---|
| 947 | if (RT_SUCCESS(rc))
|
---|
| 948 | {
|
---|
| 949 | uint8_t *pbPktBuf = pThis->pbPktBuf;
|
---|
| 950 | *pbPktBuf++ = cbThisRead < cbRead ? 'l' : 'm';
|
---|
| 951 | memcpy(pbPktBuf, pbObj + offRead, cbThisRead);
|
---|
| 952 | rc = dbgcGdbStubCtxReplySend(pThis, pThis->pbPktBuf, cbThisRead + 1);
|
---|
| 953 | }
|
---|
| 954 | else
|
---|
[84628] | 955 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, VERR_NO_MEMORY);
|
---|
[84627] | 956 | }
|
---|
| 957 | else if (offRead == cbObj)
|
---|
| 958 | rc = dbgcGdbStubCtxReplySend(pThis, "l", sizeof("l") - 1);
|
---|
| 959 | else
|
---|
| 960 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, VERR_NET_PROTOCOL_ERROR);
|
---|
| 961 |
|
---|
| 962 | return rc;
|
---|
| 963 | }
|
---|
| 964 |
|
---|
| 965 |
|
---|
| 966 | /**
|
---|
[84628] | 967 | * Parses the annex:offset,length part of a 'qXfer:object:read:...' request.
|
---|
[84627] | 968 | *
|
---|
| 969 | * @returns Status code.
|
---|
[84628] | 970 | * @param pbArgs Start of the arguments beginning with annex.
|
---|
[84627] | 971 | * @param cbArgs Number of bytes remaining for the arguments.
|
---|
| 972 | * @param ppchAnnex Where to store the pointer to the beginning of the annex on success.
|
---|
| 973 | * @param pcchAnnex Where to store the number of characters for the annex on success.
|
---|
[84628] | 974 | * @param poffRead Where to store the offset on success.
|
---|
| 975 | * @param pcbRead Where to store the length on success.
|
---|
[84627] | 976 | */
|
---|
| 977 | static int dbgcGdbStubCtxPktProcessQueryXferParseAnnexOffLen(const uint8_t *pbArgs, size_t cbArgs, const char **ppchAnnex, size_t *pcchAnnex,
|
---|
| 978 | uint32_t *poffRead, size_t *pcbRead)
|
---|
| 979 | {
|
---|
| 980 | int rc = VINF_SUCCESS;
|
---|
| 981 | const uint8_t *pbSep = (const uint8_t *)memchr(pbArgs, ':', cbArgs);
|
---|
| 982 | if (pbSep)
|
---|
| 983 | {
|
---|
| 984 | *ppchAnnex = (const char *)pbArgs;
|
---|
| 985 | *pcchAnnex = pbSep - pbArgs;
|
---|
| 986 |
|
---|
| 987 | pbSep++;
|
---|
| 988 | cbArgs -= *pcchAnnex + 1;
|
---|
| 989 |
|
---|
| 990 | uint64_t u64Tmp = 0;
|
---|
| 991 | const uint8_t *pbLenStart = NULL;
|
---|
| 992 | rc = dbgcGdbStubCtxParseHexStringAsInteger(pbSep, cbArgs, &u64Tmp, ',', &pbLenStart);
|
---|
| 993 | if ( RT_SUCCESS(rc)
|
---|
| 994 | && (uint32_t)u64Tmp == u64Tmp)
|
---|
| 995 | {
|
---|
| 996 | *poffRead = (uint32_t)u64Tmp;
|
---|
| 997 | cbArgs -= pbLenStart - pbSep;
|
---|
| 998 |
|
---|
| 999 | rc = dbgcGdbStubCtxParseHexStringAsInteger(pbLenStart + 1, cbArgs, &u64Tmp, '#', &pbLenStart);
|
---|
| 1000 | if ( RT_SUCCESS(rc)
|
---|
| 1001 | && (size_t)u64Tmp == u64Tmp)
|
---|
| 1002 | *pcbRead = (size_t)u64Tmp;
|
---|
| 1003 | else
|
---|
| 1004 | rc = VERR_NET_PROTOCOL_ERROR;
|
---|
| 1005 | }
|
---|
| 1006 | else
|
---|
| 1007 | rc = VERR_NET_PROTOCOL_ERROR;
|
---|
| 1008 | }
|
---|
| 1009 | else
|
---|
| 1010 | rc = VERR_NET_PROTOCOL_ERROR;
|
---|
| 1011 |
|
---|
| 1012 | return rc;
|
---|
| 1013 | }
|
---|
| 1014 |
|
---|
| 1015 |
|
---|
| 1016 | #define DBGREG_DESC_INIT_INT64(a_Name, a_enmDbgfReg) { a_Name, a_enmDbgfReg, 64, "int64", NULL }
|
---|
| 1017 | #define DBGREG_DESC_INIT_INT32(a_Name, a_enmDbgfReg) { a_Name, a_enmDbgfReg, 32, "int32", NULL }
|
---|
[85367] | 1018 | #define DBGREG_DESC_INIT_DATA_PTR64(a_Name, a_enmDbgfReg) { a_Name, a_enmDbgfReg, 64, "data_ptr", NULL }
|
---|
| 1019 | #define DBGREG_DESC_INIT_CODE_PTR64(a_Name, a_enmDbgfReg) { a_Name, a_enmDbgfReg, 64, "code_ptr", NULL }
|
---|
| 1020 | #define DBGREG_DESC_INIT_DATA_PTR32(a_Name, a_enmDbgfReg) { a_Name, a_enmDbgfReg, 32, "data_ptr", NULL }
|
---|
| 1021 | #define DBGREG_DESC_INIT_CODE_PTR32(a_Name, a_enmDbgfReg) { a_Name, a_enmDbgfReg, 32, "code_ptr", NULL }
|
---|
[84627] | 1022 | #define DBGREG_DESC_INIT_X87(a_Name, a_enmDbgfReg) { a_Name, a_enmDbgfReg, 80, "i387_ext", NULL }
|
---|
| 1023 | #define DBGREG_DESC_INIT_X87_CTRL(a_Name, a_enmDbgfReg) { a_Name, a_enmDbgfReg, 32, "int", "float" }
|
---|
| 1024 |
|
---|
| 1025 |
|
---|
[85367] | 1026 | /**
|
---|
| 1027 | * amd64 GDB register set.
|
---|
| 1028 | */
|
---|
| 1029 | static const GDBREGDESC g_aGdbRegs64[] =
|
---|
| 1030 | {
|
---|
| 1031 | DBGREG_DESC_INIT_INT64( "rax", DBGFREG_RAX),
|
---|
| 1032 | DBGREG_DESC_INIT_INT64( "rbx", DBGFREG_RBX),
|
---|
| 1033 | DBGREG_DESC_INIT_INT64( "rcx", DBGFREG_RCX),
|
---|
| 1034 | DBGREG_DESC_INIT_INT64( "rdx", DBGFREG_RDX),
|
---|
| 1035 | DBGREG_DESC_INIT_INT64( "rsi", DBGFREG_RSI),
|
---|
| 1036 | DBGREG_DESC_INIT_INT64( "rdi", DBGFREG_RDI),
|
---|
| 1037 | DBGREG_DESC_INIT_DATA_PTR64("rbp", DBGFREG_RBP),
|
---|
| 1038 | DBGREG_DESC_INIT_DATA_PTR64("rsp", DBGFREG_RSP),
|
---|
| 1039 | DBGREG_DESC_INIT_INT64( "r8", DBGFREG_R8),
|
---|
| 1040 | DBGREG_DESC_INIT_INT64( "r9", DBGFREG_R9),
|
---|
| 1041 | DBGREG_DESC_INIT_INT64( "r10", DBGFREG_R10),
|
---|
| 1042 | DBGREG_DESC_INIT_INT64( "r11", DBGFREG_R11),
|
---|
| 1043 | DBGREG_DESC_INIT_INT64( "r12", DBGFREG_R12),
|
---|
| 1044 | DBGREG_DESC_INIT_INT64( "r13", DBGFREG_R13),
|
---|
| 1045 | DBGREG_DESC_INIT_INT64( "r14", DBGFREG_R14),
|
---|
| 1046 | DBGREG_DESC_INIT_INT64( "r15", DBGFREG_R15),
|
---|
| 1047 | DBGREG_DESC_INIT_CODE_PTR64("rip", DBGFREG_RIP),
|
---|
| 1048 | DBGREG_DESC_INIT_INT32( "eflags", DBGFREG_FLAGS),
|
---|
| 1049 | DBGREG_DESC_INIT_INT32( "cs", DBGFREG_CS),
|
---|
| 1050 | DBGREG_DESC_INIT_INT32( "ss", DBGFREG_SS),
|
---|
| 1051 | DBGREG_DESC_INIT_INT32( "ds", DBGFREG_DS),
|
---|
| 1052 | DBGREG_DESC_INIT_INT32( "es", DBGFREG_ES),
|
---|
| 1053 | DBGREG_DESC_INIT_INT32( "fs", DBGFREG_FS),
|
---|
| 1054 | DBGREG_DESC_INIT_INT32( "gs", DBGFREG_GS),
|
---|
[84627] | 1055 |
|
---|
[85367] | 1056 | DBGREG_DESC_INIT_X87( "st0", DBGFREG_ST0),
|
---|
| 1057 | DBGREG_DESC_INIT_X87( "st1", DBGFREG_ST1),
|
---|
| 1058 | DBGREG_DESC_INIT_X87( "st2", DBGFREG_ST2),
|
---|
| 1059 | DBGREG_DESC_INIT_X87( "st3", DBGFREG_ST3),
|
---|
| 1060 | DBGREG_DESC_INIT_X87( "st4", DBGFREG_ST4),
|
---|
| 1061 | DBGREG_DESC_INIT_X87( "st5", DBGFREG_ST5),
|
---|
| 1062 | DBGREG_DESC_INIT_X87( "st6", DBGFREG_ST6),
|
---|
| 1063 | DBGREG_DESC_INIT_X87( "st7", DBGFREG_ST7),
|
---|
| 1064 |
|
---|
| 1065 | DBGREG_DESC_INIT_X87_CTRL( "fctrl", DBGFREG_FCW),
|
---|
| 1066 | DBGREG_DESC_INIT_X87_CTRL( "fstat", DBGFREG_FSW),
|
---|
| 1067 | DBGREG_DESC_INIT_X87_CTRL( "ftag", DBGFREG_FTW),
|
---|
| 1068 | DBGREG_DESC_INIT_X87_CTRL( "fop", DBGFREG_FOP),
|
---|
| 1069 | DBGREG_DESC_INIT_X87_CTRL( "fioff", DBGFREG_FPUIP),
|
---|
| 1070 | DBGREG_DESC_INIT_X87_CTRL( "fiseg", DBGFREG_FPUCS),
|
---|
| 1071 | DBGREG_DESC_INIT_X87_CTRL( "fooff", DBGFREG_FPUDP),
|
---|
| 1072 | DBGREG_DESC_INIT_X87_CTRL( "foseg", DBGFREG_FPUDS)
|
---|
| 1073 | };
|
---|
| 1074 |
|
---|
| 1075 |
|
---|
| 1076 | /**
|
---|
| 1077 | * i386 GDB register set.
|
---|
| 1078 | */
|
---|
| 1079 | static const GDBREGDESC g_aGdbRegs32[] =
|
---|
| 1080 | {
|
---|
| 1081 | DBGREG_DESC_INIT_INT32( "eax", DBGFREG_EAX),
|
---|
| 1082 | DBGREG_DESC_INIT_INT32( "ebx", DBGFREG_EBX),
|
---|
| 1083 | DBGREG_DESC_INIT_INT32( "ecx", DBGFREG_ECX),
|
---|
| 1084 | DBGREG_DESC_INIT_INT32( "edx", DBGFREG_EDX),
|
---|
| 1085 | DBGREG_DESC_INIT_INT32( "esi", DBGFREG_ESI),
|
---|
| 1086 | DBGREG_DESC_INIT_INT32( "edi", DBGFREG_EDI),
|
---|
| 1087 | DBGREG_DESC_INIT_DATA_PTR32("ebp", DBGFREG_EBP),
|
---|
| 1088 | DBGREG_DESC_INIT_DATA_PTR32("esp", DBGFREG_ESP),
|
---|
| 1089 | DBGREG_DESC_INIT_CODE_PTR32("eip", DBGFREG_EIP),
|
---|
| 1090 | DBGREG_DESC_INIT_INT32( "eflags", DBGFREG_FLAGS),
|
---|
| 1091 | DBGREG_DESC_INIT_INT32( "cs", DBGFREG_CS),
|
---|
| 1092 | DBGREG_DESC_INIT_INT32( "ss", DBGFREG_SS),
|
---|
| 1093 | DBGREG_DESC_INIT_INT32( "ds", DBGFREG_DS),
|
---|
| 1094 | DBGREG_DESC_INIT_INT32( "es", DBGFREG_ES),
|
---|
| 1095 | DBGREG_DESC_INIT_INT32( "fs", DBGFREG_FS),
|
---|
| 1096 | DBGREG_DESC_INIT_INT32( "gs", DBGFREG_GS),
|
---|
| 1097 |
|
---|
| 1098 | DBGREG_DESC_INIT_X87( "st0", DBGFREG_ST0),
|
---|
| 1099 | DBGREG_DESC_INIT_X87( "st1", DBGFREG_ST1),
|
---|
| 1100 | DBGREG_DESC_INIT_X87( "st2", DBGFREG_ST2),
|
---|
| 1101 | DBGREG_DESC_INIT_X87( "st3", DBGFREG_ST3),
|
---|
| 1102 | DBGREG_DESC_INIT_X87( "st4", DBGFREG_ST4),
|
---|
| 1103 | DBGREG_DESC_INIT_X87( "st5", DBGFREG_ST5),
|
---|
| 1104 | DBGREG_DESC_INIT_X87( "st6", DBGFREG_ST6),
|
---|
| 1105 | DBGREG_DESC_INIT_X87( "st7", DBGFREG_ST7),
|
---|
| 1106 |
|
---|
| 1107 | DBGREG_DESC_INIT_X87_CTRL( "fctrl", DBGFREG_FCW),
|
---|
| 1108 | DBGREG_DESC_INIT_X87_CTRL( "fstat", DBGFREG_FSW),
|
---|
| 1109 | DBGREG_DESC_INIT_X87_CTRL( "ftag", DBGFREG_FTW),
|
---|
| 1110 | DBGREG_DESC_INIT_X87_CTRL( "fop", DBGFREG_FOP),
|
---|
| 1111 | DBGREG_DESC_INIT_X87_CTRL( "fioff", DBGFREG_FPUIP),
|
---|
| 1112 | DBGREG_DESC_INIT_X87_CTRL( "fiseg", DBGFREG_FPUCS),
|
---|
| 1113 | DBGREG_DESC_INIT_X87_CTRL( "fooff", DBGFREG_FPUDP),
|
---|
| 1114 | DBGREG_DESC_INIT_X87_CTRL( "foseg", DBGFREG_FPUDS)
|
---|
| 1115 | };
|
---|
| 1116 |
|
---|
| 1117 | #undef DBGREG_DESC_INIT_CODE_PTR64
|
---|
| 1118 | #undef DBGREG_DESC_INIT_DATA_PTR64
|
---|
| 1119 | #undef DBGREG_DESC_INIT_CODE_PTR32
|
---|
| 1120 | #undef DBGREG_DESC_INIT_DATA_PTR32
|
---|
[84627] | 1121 | #undef DBGREG_DESC_INIT_INT32
|
---|
| 1122 | #undef DBGREG_DESC_INIT_INT64
|
---|
[85367] | 1123 | #undef DBGREG_DESC_INIT_X87
|
---|
| 1124 | #undef DBGREG_DESC_INIT_X87_CTRL
|
---|
[84627] | 1125 |
|
---|
| 1126 |
|
---|
| 1127 | /**
|
---|
| 1128 | * Creates the target XML description.
|
---|
| 1129 | *
|
---|
| 1130 | * @returns Status code.
|
---|
| 1131 | * @param pThis The GDB stub context.
|
---|
| 1132 | */
|
---|
| 1133 | static int dbgcGdbStubCtxTgtXmlDescCreate(PGDBSTUBCTX pThis)
|
---|
| 1134 | {
|
---|
[85367] | 1135 | static const char s_szXmlTgtHdr64[] =
|
---|
[84627] | 1136 | "<?xml version=\"1.0\"?>\n"
|
---|
| 1137 | "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">\n"
|
---|
| 1138 | "<target version=\"1.0\">\n"
|
---|
| 1139 | " <architecture>i386:x86-64</architecture>\n"
|
---|
| 1140 | " <feature name=\"org.gnu.gdb.i386.core\">\n";
|
---|
[85367] | 1141 | static const char s_szXmlTgtHdr32[] =
|
---|
| 1142 | "<?xml version=\"1.0\"?>\n"
|
---|
| 1143 | "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">\n"
|
---|
| 1144 | "<target version=\"1.0\">\n"
|
---|
| 1145 | " <architecture>i386</architecture>\n"
|
---|
| 1146 | " <feature name=\"org.gnu.gdb.i386.core\">\n";
|
---|
[84627] | 1147 | static const char s_szXmlTgtFooter[] =
|
---|
| 1148 | " </feature>\n"
|
---|
| 1149 | "</target>\n";
|
---|
| 1150 |
|
---|
| 1151 | int rc = VINF_SUCCESS;
|
---|
| 1152 |
|
---|
| 1153 | pThis->pachTgtXmlDesc = (char *)RTStrAlloc(_32K);
|
---|
| 1154 | if (pThis->pachTgtXmlDesc)
|
---|
| 1155 | {
|
---|
| 1156 | size_t cbLeft = _32K;
|
---|
| 1157 | char *pachXmlCur = pThis->pachTgtXmlDesc;
|
---|
| 1158 | pThis->cbTgtXmlDesc = cbLeft;
|
---|
| 1159 |
|
---|
[85367] | 1160 | rc = RTStrCatP(&pachXmlCur, &cbLeft, pThis->paRegs == &g_aGdbRegs64[0] ? &s_szXmlTgtHdr64[0] : &s_szXmlTgtHdr32[0]);
|
---|
[84627] | 1161 | if (RT_SUCCESS(rc))
|
---|
| 1162 | {
|
---|
| 1163 | /* Register */
|
---|
[85367] | 1164 | for (uint32_t i = 0; i < pThis->cRegs && RT_SUCCESS(rc); i++)
|
---|
[84627] | 1165 | {
|
---|
[85367] | 1166 | const struct GDBREGDESC *pReg = &pThis->paRegs[i];
|
---|
[84627] | 1167 |
|
---|
| 1168 | ssize_t cchStr = 0;
|
---|
| 1169 | if (pReg->pszGroup)
|
---|
| 1170 | cchStr = RTStrPrintf2(pachXmlCur, cbLeft,
|
---|
| 1171 | "<reg name=\"%s\" bitsize=\"%u\" regnum=\"%u\" type=\"%s\" group=\"%s\"/>\n",
|
---|
[84690] | 1172 | pReg->pszName, pReg->cBits, i, pReg->pszType, pReg->pszGroup);
|
---|
[84627] | 1173 | else
|
---|
| 1174 | cchStr = RTStrPrintf2(pachXmlCur, cbLeft,
|
---|
| 1175 | "<reg name=\"%s\" bitsize=\"%u\" regnum=\"%u\" type=\"%s\"/>\n",
|
---|
[84690] | 1176 | pReg->pszName, pReg->cBits, i, pReg->pszType);
|
---|
[84627] | 1177 |
|
---|
| 1178 | if (cchStr > 0)
|
---|
| 1179 | {
|
---|
| 1180 | pachXmlCur += cchStr;
|
---|
| 1181 | cbLeft -= cchStr;
|
---|
| 1182 | }
|
---|
| 1183 | else
|
---|
| 1184 | rc = VERR_BUFFER_OVERFLOW;
|
---|
| 1185 | }
|
---|
| 1186 | }
|
---|
| 1187 |
|
---|
| 1188 | if (RT_SUCCESS(rc))
|
---|
| 1189 | rc = RTStrCatP(&pachXmlCur, &cbLeft, &s_szXmlTgtFooter[0]);
|
---|
| 1190 |
|
---|
| 1191 | pThis->cbTgtXmlDesc -= cbLeft;
|
---|
| 1192 | }
|
---|
| 1193 | else
|
---|
| 1194 | rc = VERR_NO_MEMORY;
|
---|
| 1195 |
|
---|
| 1196 | return rc;
|
---|
| 1197 | }
|
---|
| 1198 |
|
---|
| 1199 |
|
---|
| 1200 | /**
|
---|
| 1201 | * Returns the GDB register descriptor describing the given DBGF register enum.
|
---|
| 1202 | *
|
---|
| 1203 | * @returns Pointer to the GDB register descriptor or NULL if not found.
|
---|
[85367] | 1204 | * @param pThis The GDB stub context.
|
---|
[84691] | 1205 | * @param idxReg The register to look for.
|
---|
[84627] | 1206 | */
|
---|
[85367] | 1207 | static const GDBREGDESC *dbgcGdbStubRegGet(PGDBSTUBCTX pThis, uint32_t idxReg)
|
---|
[84627] | 1208 | {
|
---|
[85367] | 1209 | if (RT_LIKELY(idxReg < pThis->cRegs))
|
---|
| 1210 | return &pThis->paRegs[idxReg];
|
---|
[84627] | 1211 |
|
---|
| 1212 | return NULL;
|
---|
| 1213 | }
|
---|
| 1214 |
|
---|
| 1215 |
|
---|
| 1216 | /**
|
---|
[84707] | 1217 | * Processes the 'C' query (query current thread ID).
|
---|
| 1218 | *
|
---|
| 1219 | * @returns Status code.
|
---|
| 1220 | * @param pThis The GDB stub context.
|
---|
| 1221 | * @param pbArgs Pointer to the start of the arguments in the packet.
|
---|
| 1222 | * @param cbArgs Size of arguments in bytes.
|
---|
| 1223 | */
|
---|
[85177] | 1224 | static DECLCALLBACK(int) dbgcGdbStubCtxPktProcessQueryThreadId(PGDBSTUBCTX pThis, const uint8_t *pbArgs, size_t cbArgs)
|
---|
[84707] | 1225 | {
|
---|
| 1226 | RT_NOREF(pbArgs, cbArgs);
|
---|
| 1227 |
|
---|
| 1228 | int rc = VERR_BUFFER_OVERFLOW;
|
---|
| 1229 | char achReply[32];
|
---|
| 1230 | ssize_t cchStr = RTStrPrintf(&achReply[0], sizeof(achReply), "QC %02x", pThis->Dbgc.idCpu + 1);
|
---|
| 1231 | if (cchStr > 0)
|
---|
| 1232 | rc = dbgcGdbStubCtxReplySend(pThis, &achReply[0], cchStr);
|
---|
| 1233 |
|
---|
| 1234 | return rc;
|
---|
| 1235 | }
|
---|
| 1236 |
|
---|
| 1237 |
|
---|
| 1238 | /**
|
---|
| 1239 | * Processes the 'Attached' query.
|
---|
| 1240 | *
|
---|
| 1241 | * @returns Status code.
|
---|
| 1242 | * @param pThis The GDB stub context.
|
---|
| 1243 | * @param pbArgs Pointer to the start of the arguments in the packet.
|
---|
| 1244 | * @param cbArgs Size of arguments in bytes.
|
---|
| 1245 | */
|
---|
[85177] | 1246 | static DECLCALLBACK(int) dbgcGdbStubCtxPktProcessQueryAttached(PGDBSTUBCTX pThis, const uint8_t *pbArgs, size_t cbArgs)
|
---|
[84707] | 1247 | {
|
---|
| 1248 | RT_NOREF(pbArgs, cbArgs);
|
---|
| 1249 |
|
---|
| 1250 | /* We always report attached so that the VM doesn't get killed when GDB quits. */
|
---|
| 1251 | uint8_t bAttached = '1';
|
---|
| 1252 | return dbgcGdbStubCtxReplySend(pThis, &bAttached, sizeof(bAttached));
|
---|
| 1253 | }
|
---|
| 1254 |
|
---|
| 1255 |
|
---|
| 1256 | /**
|
---|
[84627] | 1257 | * Processes the 'Xfer:features:read' query.
|
---|
| 1258 | *
|
---|
| 1259 | * @returns Status code.
|
---|
| 1260 | * @param pThis The GDB stub context.
|
---|
| 1261 | * @param pbArgs Pointer to the start of the arguments in the packet.
|
---|
| 1262 | * @param cbArgs Size of arguments in bytes.
|
---|
| 1263 | */
|
---|
[85177] | 1264 | static DECLCALLBACK(int) dbgcGdbStubCtxPktProcessQueryXferFeatRead(PGDBSTUBCTX pThis, const uint8_t *pbArgs, size_t cbArgs)
|
---|
[84627] | 1265 | {
|
---|
| 1266 | /* Skip the : following the Xfer:features:read start. */
|
---|
| 1267 | if ( cbArgs < 1
|
---|
| 1268 | || pbArgs[0] != ':')
|
---|
| 1269 | return VERR_NET_PROTOCOL_ERROR;
|
---|
| 1270 |
|
---|
| 1271 | cbArgs--;
|
---|
| 1272 | pbArgs++;
|
---|
| 1273 |
|
---|
| 1274 | int rc = VINF_SUCCESS;
|
---|
| 1275 | if (pThis->fFeatures & GDBSTUBCTX_FEATURES_F_TGT_DESC)
|
---|
| 1276 | {
|
---|
| 1277 | /* Create the target XML description if not existing. */
|
---|
| 1278 | if (!pThis->pachTgtXmlDesc)
|
---|
| 1279 | rc = dbgcGdbStubCtxTgtXmlDescCreate(pThis);
|
---|
| 1280 |
|
---|
| 1281 | if (RT_SUCCESS(rc))
|
---|
| 1282 | {
|
---|
| 1283 | /* Parse annex, offset and length and return the data. */
|
---|
| 1284 | const char *pchAnnex = NULL;
|
---|
| 1285 | size_t cchAnnex = 0;
|
---|
| 1286 | uint32_t offRead = 0;
|
---|
| 1287 | size_t cbRead = 0;
|
---|
| 1288 |
|
---|
| 1289 | rc = dbgcGdbStubCtxPktProcessQueryXferParseAnnexOffLen(pbArgs, cbArgs,
|
---|
| 1290 | &pchAnnex, &cchAnnex,
|
---|
| 1291 | &offRead, &cbRead);
|
---|
| 1292 | if (RT_SUCCESS(rc))
|
---|
| 1293 | {
|
---|
| 1294 | /* Check whether the annex is supported. */
|
---|
| 1295 | if ( cchAnnex == sizeof("target.xml") - 1
|
---|
| 1296 | && !memcmp(pchAnnex, "target.xml", cchAnnex))
|
---|
| 1297 | rc = dbgcGdbStubCtxQueryXferReadReply(pThis, offRead, cbRead, (const uint8_t *)pThis->pachTgtXmlDesc,
|
---|
| 1298 | pThis->cbTgtXmlDesc);
|
---|
| 1299 | else
|
---|
| 1300 | rc = dbgcGdbStubCtxReplySendErr(pThis, 0);
|
---|
| 1301 | }
|
---|
| 1302 | else
|
---|
| 1303 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1304 | }
|
---|
| 1305 | else
|
---|
| 1306 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1307 | }
|
---|
| 1308 | else
|
---|
| 1309 | rc = dbgcGdbStubCtxReplySend(pThis, NULL, 0); /* Not supported. */
|
---|
| 1310 |
|
---|
| 1311 | return rc;
|
---|
| 1312 | }
|
---|
| 1313 |
|
---|
| 1314 |
|
---|
| 1315 | /**
|
---|
| 1316 | * Processes the 'Rcmd' query.
|
---|
| 1317 | *
|
---|
| 1318 | * @returns Status code.
|
---|
| 1319 | * @param pThis The GDB stub context.
|
---|
| 1320 | * @param pbArgs Pointer to the start of the arguments in the packet.
|
---|
| 1321 | * @param cbArgs Size of arguments in bytes.
|
---|
| 1322 | */
|
---|
[85177] | 1323 | static DECLCALLBACK(int) dbgcGdbStubCtxPktProcessQueryRcmd(PGDBSTUBCTX pThis, const uint8_t *pbArgs, size_t cbArgs)
|
---|
[84627] | 1324 | {
|
---|
| 1325 | /* Skip the , following the qRcmd start. */
|
---|
| 1326 | if ( cbArgs < 1
|
---|
| 1327 | || pbArgs[0] != ',')
|
---|
[84653] | 1328 | return VERR_NET_PROTOCOL_ERROR;
|
---|
[84627] | 1329 |
|
---|
| 1330 | cbArgs--;
|
---|
| 1331 | pbArgs++;
|
---|
| 1332 |
|
---|
| 1333 | /* Decode the command. */
|
---|
| 1334 | /** @todo Make this dynamic. */
|
---|
[84653] | 1335 | char szCmd[_4K];
|
---|
| 1336 | RT_ZERO(szCmd);
|
---|
| 1337 |
|
---|
[84627] | 1338 | if (cbArgs / 2 >= sizeof(szCmd))
|
---|
[84653] | 1339 | return VERR_NET_PROTOCOL_ERROR;
|
---|
[84627] | 1340 |
|
---|
| 1341 | size_t cbDecoded = 0;
|
---|
[84653] | 1342 | int rc = RTStrConvertHexBytesEx((const char *)pbArgs, &szCmd[0], sizeof(szCmd), 0 /*fFlags*/,
|
---|
| 1343 | NULL /* ppszNext */, &cbDecoded);
|
---|
| 1344 | if (rc == VWRN_TRAILING_CHARS)
|
---|
| 1345 | rc = VINF_SUCCESS;
|
---|
| 1346 | if (RT_SUCCESS(rc))
|
---|
[84627] | 1347 | {
|
---|
| 1348 | szCmd[cbDecoded] = '\0'; /* Ensure zero termination. */
|
---|
| 1349 |
|
---|
[84653] | 1350 | pThis->fOutput = false;
|
---|
[97728] | 1351 | rc = dbgcEvalCommand(&pThis->Dbgc, &szCmd[0], cbDecoded - 1, false /*fNoExecute*/);
|
---|
[84653] | 1352 | dbgcGdbStubCtxReplySendOk(pThis);
|
---|
| 1353 | if ( rc != VERR_DBGC_QUIT
|
---|
| 1354 | && rc != VWRN_DBGC_CMD_PENDING)
|
---|
| 1355 | rc = VINF_SUCCESS; /* ignore other statuses */
|
---|
[84627] | 1356 | }
|
---|
| 1357 |
|
---|
| 1358 | return rc;
|
---|
| 1359 | }
|
---|
| 1360 |
|
---|
| 1361 |
|
---|
| 1362 | /**
|
---|
[84707] | 1363 | * Worker for both 'qfThreadInfo' and 'qsThreadInfo'.
|
---|
| 1364 | *
|
---|
| 1365 | * @returns VBox status code.
|
---|
| 1366 | * @param pThis The GDB stub context.
|
---|
| 1367 | */
|
---|
| 1368 | static int dbgcGdbStubCtxPktProcessQueryThreadInfoWorker(PGDBSTUBCTX pThis)
|
---|
| 1369 | {
|
---|
| 1370 | int rc = dbgcGdbStubCtxReplySendBegin(pThis);
|
---|
| 1371 | if (RT_SUCCESS(rc))
|
---|
| 1372 | {
|
---|
| 1373 | uint8_t bReplyStart = { 'm' };
|
---|
| 1374 | rc = dbgcGdbStubCtxReplySendData(pThis, &bReplyStart, sizeof(bReplyStart));
|
---|
| 1375 | if (RT_SUCCESS(rc))
|
---|
| 1376 | {
|
---|
| 1377 | char achReply[32];
|
---|
| 1378 | ssize_t cchStr = RTStrPrintf(&achReply[0], sizeof(achReply), "%02x", pThis->idCpuNextThrdInfoQuery + 1);
|
---|
| 1379 | if (cchStr <= 0)
|
---|
| 1380 | rc = VERR_BUFFER_OVERFLOW;
|
---|
| 1381 |
|
---|
| 1382 | if (RT_SUCCESS(rc))
|
---|
| 1383 | rc = dbgcGdbStubCtxReplySendData(pThis, &achReply[0], cchStr);
|
---|
[103433] | 1384 | if (RT_SUCCESS(rc))
|
---|
| 1385 | rc = dbgcGdbStubCtxReplySendEnd(pThis);
|
---|
[84707] | 1386 | pThis->idCpuNextThrdInfoQuery++;
|
---|
| 1387 | }
|
---|
| 1388 | }
|
---|
| 1389 |
|
---|
| 1390 | return rc;
|
---|
| 1391 | }
|
---|
| 1392 |
|
---|
| 1393 |
|
---|
| 1394 | /**
|
---|
| 1395 | * Processes the 'fThreadInfo' query.
|
---|
| 1396 | *
|
---|
| 1397 | * @returns Status code.
|
---|
| 1398 | * @param pThis The GDB stub context.
|
---|
| 1399 | * @param pbArgs Pointer to the start of the arguments in the packet.
|
---|
| 1400 | * @param cbArgs Size of arguments in bytes.
|
---|
| 1401 | */
|
---|
[85177] | 1402 | static DECLCALLBACK(int) dbgcGdbStubCtxPktProcessQueryThreadInfoStart(PGDBSTUBCTX pThis, const uint8_t *pbArgs, size_t cbArgs)
|
---|
[84707] | 1403 | {
|
---|
| 1404 | RT_NOREF(pbArgs, cbArgs);
|
---|
| 1405 |
|
---|
| 1406 | pThis->idCpuNextThrdInfoQuery = 0;
|
---|
| 1407 | pThis->fInThrdInfoQuery = true;
|
---|
| 1408 | return dbgcGdbStubCtxPktProcessQueryThreadInfoWorker(pThis);
|
---|
| 1409 | }
|
---|
| 1410 |
|
---|
| 1411 |
|
---|
| 1412 | /**
|
---|
| 1413 | * Processes the 'fThreadInfo' query.
|
---|
| 1414 | *
|
---|
| 1415 | * @returns Status code.
|
---|
| 1416 | * @param pThis The GDB stub context.
|
---|
| 1417 | * @param pbArgs Pointer to the start of the arguments in the packet.
|
---|
| 1418 | * @param cbArgs Size of arguments in bytes.
|
---|
| 1419 | */
|
---|
[85177] | 1420 | static DECLCALLBACK(int) dbgcGdbStubCtxPktProcessQueryThreadInfoCont(PGDBSTUBCTX pThis, const uint8_t *pbArgs, size_t cbArgs)
|
---|
[84707] | 1421 | {
|
---|
| 1422 | RT_NOREF(pbArgs, cbArgs);
|
---|
| 1423 |
|
---|
| 1424 | /* If we are in a thread info query we just send the end of list specifier (all thread IDs where sent previously already). */
|
---|
| 1425 | if (!pThis->fInThrdInfoQuery)
|
---|
| 1426 | return dbgcGdbStubCtxReplySendErrSts(pThis, VERR_NET_PROTOCOL_ERROR);
|
---|
| 1427 |
|
---|
| 1428 | VMCPUID cCpus = DBGFR3CpuGetCount(pThis->Dbgc.pUVM);
|
---|
| 1429 | if (pThis->idCpuNextThrdInfoQuery == cCpus)
|
---|
| 1430 | {
|
---|
| 1431 | pThis->fInThrdInfoQuery = false;
|
---|
| 1432 | uint8_t bEoL = 'l';
|
---|
| 1433 | return dbgcGdbStubCtxReplySend(pThis, &bEoL, sizeof(bEoL));
|
---|
| 1434 | }
|
---|
| 1435 |
|
---|
| 1436 | return dbgcGdbStubCtxPktProcessQueryThreadInfoWorker(pThis);
|
---|
| 1437 | }
|
---|
| 1438 |
|
---|
| 1439 |
|
---|
| 1440 | /**
|
---|
| 1441 | * Processes the 'ThreadExtraInfo' query.
|
---|
| 1442 | *
|
---|
| 1443 | * @returns Status code.
|
---|
| 1444 | * @param pThis The GDB stub context.
|
---|
| 1445 | * @param pbArgs Pointer to the start of the arguments in the packet.
|
---|
| 1446 | * @param cbArgs Size of arguments in bytes.
|
---|
| 1447 | */
|
---|
[85177] | 1448 | static DECLCALLBACK(int) dbgcGdbStubCtxPktProcessQueryThreadExtraInfo(PGDBSTUBCTX pThis, const uint8_t *pbArgs, size_t cbArgs)
|
---|
[84707] | 1449 | {
|
---|
| 1450 | /* Skip the , following the qThreadExtraInfo start. */
|
---|
| 1451 | if ( cbArgs < 1
|
---|
| 1452 | || pbArgs[0] != ',')
|
---|
| 1453 | return VERR_NET_PROTOCOL_ERROR;
|
---|
| 1454 |
|
---|
[103433] | 1455 | /*cbArgs--;*/ /* Not used */
|
---|
[84707] | 1456 | pbArgs++;
|
---|
| 1457 |
|
---|
| 1458 | /* We know there is an # character denoting the end so the following must return with VWRN_TRAILING_CHARS. */
|
---|
| 1459 | VMCPUID idCpu;
|
---|
| 1460 | int rc = RTStrToUInt32Ex((const char *)pbArgs, NULL /*ppszNext*/, 16, &idCpu);
|
---|
| 1461 | if ( rc == VWRN_TRAILING_CHARS
|
---|
| 1462 | && idCpu > 0)
|
---|
| 1463 | {
|
---|
| 1464 | idCpu--;
|
---|
| 1465 |
|
---|
| 1466 | VMCPUID cCpus = DBGFR3CpuGetCount(pThis->Dbgc.pUVM);
|
---|
| 1467 | if (idCpu < cCpus)
|
---|
| 1468 | {
|
---|
| 1469 | const char *pszCpuState = DBGFR3CpuGetState(pThis->Dbgc.pUVM, idCpu);
|
---|
| 1470 | size_t cchCpuState = strlen(pszCpuState);
|
---|
| 1471 |
|
---|
| 1472 | if (!pszCpuState)
|
---|
| 1473 | pszCpuState = "DBGFR3CpuGetState() -> NULL";
|
---|
| 1474 |
|
---|
| 1475 | rc = dbgcGdbStubCtxReplySendBegin(pThis);
|
---|
| 1476 | if (RT_SUCCESS(rc))
|
---|
| 1477 | {
|
---|
| 1478 | /* Convert the characters to hex. */
|
---|
| 1479 | const char *pachCur = pszCpuState;
|
---|
| 1480 |
|
---|
| 1481 | while ( cchCpuState
|
---|
| 1482 | && RT_SUCCESS(rc))
|
---|
| 1483 | {
|
---|
| 1484 | uint8_t achHex[512 + 1];
|
---|
| 1485 | size_t cbThisSend = RT_MIN((sizeof(achHex) - 1) / 2, cchCpuState); /* Each character needs two bytes. */
|
---|
| 1486 |
|
---|
| 1487 | rc = dbgcGdbStubCtxEncodeBinaryAsHex(&achHex[0], cbThisSend * 2 + 1, pachCur, cbThisSend);
|
---|
| 1488 | if (RT_SUCCESS(rc))
|
---|
| 1489 | rc = dbgcGdbStubCtxReplySendData(pThis, &achHex[0], cbThisSend * 2);
|
---|
| 1490 |
|
---|
| 1491 | pachCur += cbThisSend;
|
---|
| 1492 | cchCpuState -= cbThisSend;
|
---|
| 1493 | }
|
---|
| 1494 |
|
---|
| 1495 | dbgcGdbStubCtxReplySendEnd(pThis);
|
---|
| 1496 | }
|
---|
| 1497 | }
|
---|
| 1498 | else
|
---|
| 1499 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, VERR_NET_PROTOCOL_ERROR);
|
---|
| 1500 | }
|
---|
| 1501 | else if ( RT_SUCCESS(rc)
|
---|
| 1502 | || !idCpu)
|
---|
| 1503 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, VERR_NET_PROTOCOL_ERROR);
|
---|
| 1504 |
|
---|
| 1505 | return rc;
|
---|
| 1506 | }
|
---|
| 1507 |
|
---|
| 1508 |
|
---|
| 1509 | /**
|
---|
[84627] | 1510 | * List of supported query packets.
|
---|
| 1511 | */
|
---|
| 1512 | static const GDBSTUBQPKTPROC g_aQPktProcs[] =
|
---|
| 1513 | {
|
---|
| 1514 | #define GDBSTUBQPKTPROC_INIT(a_Name, a_pfnProc) { a_Name, sizeof(a_Name) - 1, a_pfnProc }
|
---|
[84707] | 1515 | GDBSTUBQPKTPROC_INIT("C", dbgcGdbStubCtxPktProcessQueryThreadId),
|
---|
| 1516 | GDBSTUBQPKTPROC_INIT("Attached", dbgcGdbStubCtxPktProcessQueryAttached),
|
---|
[84627] | 1517 | GDBSTUBQPKTPROC_INIT("TStatus", dbgcGdbStubCtxPktProcessQueryTStatus),
|
---|
| 1518 | GDBSTUBQPKTPROC_INIT("Supported", dbgcGdbStubCtxPktProcessQuerySupported),
|
---|
| 1519 | GDBSTUBQPKTPROC_INIT("Xfer:features:read", dbgcGdbStubCtxPktProcessQueryXferFeatRead),
|
---|
[84653] | 1520 | GDBSTUBQPKTPROC_INIT("Rcmd", dbgcGdbStubCtxPktProcessQueryRcmd),
|
---|
[84707] | 1521 | GDBSTUBQPKTPROC_INIT("fThreadInfo", dbgcGdbStubCtxPktProcessQueryThreadInfoStart),
|
---|
| 1522 | GDBSTUBQPKTPROC_INIT("sThreadInfo", dbgcGdbStubCtxPktProcessQueryThreadInfoCont),
|
---|
| 1523 | GDBSTUBQPKTPROC_INIT("ThreadExtraInfo", dbgcGdbStubCtxPktProcessQueryThreadExtraInfo),
|
---|
[84627] | 1524 | #undef GDBSTUBQPKTPROC_INIT
|
---|
| 1525 | };
|
---|
| 1526 |
|
---|
| 1527 |
|
---|
| 1528 | /**
|
---|
| 1529 | * Processes a 'q' packet, sending the appropriate reply.
|
---|
| 1530 | *
|
---|
| 1531 | * @returns Status code.
|
---|
| 1532 | * @param pThis The GDB stub context.
|
---|
| 1533 | * @param pbQuery The query packet data (without the 'q').
|
---|
| 1534 | * @param cbQuery Size of the remaining query packet in bytes.
|
---|
| 1535 | */
|
---|
| 1536 | static int dbgcGdbStubCtxPktProcessQuery(PGDBSTUBCTX pThis, const uint8_t *pbQuery, size_t cbQuery)
|
---|
| 1537 | {
|
---|
| 1538 | /* Search the query and execute the processor or return an empty reply if not supported. */
|
---|
| 1539 | for (uint32_t i = 0; i < RT_ELEMENTS(g_aQPktProcs); i++)
|
---|
| 1540 | {
|
---|
| 1541 | size_t cbCmp = g_aQPktProcs[i].cchName < cbQuery ? g_aQPktProcs[i].cchName : cbQuery;
|
---|
| 1542 |
|
---|
| 1543 | if (!memcmp(pbQuery, g_aQPktProcs[i].pszName, cbCmp))
|
---|
| 1544 | return g_aQPktProcs[i].pfnProc(pThis, pbQuery + cbCmp, cbQuery - cbCmp);
|
---|
| 1545 | }
|
---|
| 1546 |
|
---|
| 1547 | return dbgcGdbStubCtxReplySend(pThis, NULL, 0);
|
---|
| 1548 | }
|
---|
| 1549 |
|
---|
| 1550 |
|
---|
| 1551 | /**
|
---|
| 1552 | * Processes a 'vCont[;action[:thread-id]]' packet.
|
---|
| 1553 | *
|
---|
| 1554 | * @returns Status code.
|
---|
| 1555 | * @param pThis The GDB stub context.
|
---|
| 1556 | * @param pbArgs Pointer to the start of the arguments in the packet.
|
---|
| 1557 | * @param cbArgs Size of arguments in bytes.
|
---|
| 1558 | */
|
---|
[85177] | 1559 | static DECLCALLBACK(int) dbgcGdbStubCtxPktProcessVCont(PGDBSTUBCTX pThis, const uint8_t *pbArgs, size_t cbArgs)
|
---|
[84627] | 1560 | {
|
---|
| 1561 | int rc = VINF_SUCCESS;
|
---|
| 1562 |
|
---|
| 1563 | /* Skip the ; following the identifier. */
|
---|
| 1564 | if ( cbArgs < 2
|
---|
| 1565 | || pbArgs[0] != ';')
|
---|
| 1566 | return dbgcGdbStubCtxReplySendErrSts(pThis, VERR_NET_PROTOCOL_ERROR);
|
---|
| 1567 |
|
---|
| 1568 | pbArgs++;
|
---|
[103433] | 1569 | /*cbArgs--;*/ /* Not used */
|
---|
[84627] | 1570 |
|
---|
| 1571 | /** @todo For now we don't care about multiple threads and ignore thread IDs and multiple actions. */
|
---|
| 1572 | switch (pbArgs[0])
|
---|
| 1573 | {
|
---|
| 1574 | case 'c':
|
---|
| 1575 | {
|
---|
[86098] | 1576 | if (DBGFR3IsHalted(pThis->Dbgc.pUVM, VMCPUID_ALL))
|
---|
| 1577 | DBGFR3Resume(pThis->Dbgc.pUVM, VMCPUID_ALL);
|
---|
[84627] | 1578 | break;
|
---|
| 1579 | }
|
---|
| 1580 | case 's':
|
---|
| 1581 | {
|
---|
| 1582 | PDBGFADDRESS pStackPop = NULL;
|
---|
| 1583 | RTGCPTR cbStackPop = 0;
|
---|
| 1584 | rc = DBGFR3StepEx(pThis->Dbgc.pUVM, pThis->Dbgc.idCpu, DBGF_STEP_F_INTO, NULL,
|
---|
| 1585 | pStackPop, cbStackPop, 1 /*cMaxSteps*/);
|
---|
| 1586 | if (RT_FAILURE(rc))
|
---|
| 1587 | dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1588 | break;
|
---|
| 1589 | }
|
---|
| 1590 | case 't':
|
---|
| 1591 | {
|
---|
[86098] | 1592 | if (!DBGFR3IsHalted(pThis->Dbgc.pUVM, VMCPUID_ALL))
|
---|
| 1593 | rc = DBGFR3Halt(pThis->Dbgc.pUVM, VMCPUID_ALL);
|
---|
[84627] | 1594 | /* The reply will be send in the event loop. */
|
---|
| 1595 | break;
|
---|
| 1596 | }
|
---|
| 1597 | default:
|
---|
| 1598 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, VERR_NET_PROTOCOL_ERROR);
|
---|
| 1599 | }
|
---|
| 1600 |
|
---|
| 1601 | return rc;
|
---|
| 1602 | }
|
---|
| 1603 |
|
---|
| 1604 |
|
---|
| 1605 | /**
|
---|
| 1606 | * List of supported 'v<identifier>' packets.
|
---|
| 1607 | */
|
---|
| 1608 | static const GDBSTUBVPKTPROC g_aVPktProcs[] =
|
---|
| 1609 | {
|
---|
| 1610 | #define GDBSTUBVPKTPROC_INIT(a_Name, a_pszReply, a_pfnProc) { a_Name, sizeof(a_Name) - 1, a_pszReply, sizeof(a_pszReply) - 1, a_pfnProc }
|
---|
| 1611 | GDBSTUBVPKTPROC_INIT("Cont", "vCont;s;c;t", dbgcGdbStubCtxPktProcessVCont)
|
---|
| 1612 | #undef GDBSTUBVPKTPROC_INIT
|
---|
| 1613 | };
|
---|
| 1614 |
|
---|
| 1615 |
|
---|
| 1616 | /**
|
---|
| 1617 | * Processes a 'v<identifier>' packet, sending the appropriate reply.
|
---|
| 1618 | *
|
---|
| 1619 | * @returns Status code.
|
---|
| 1620 | * @param pThis The GDB stub context.
|
---|
| 1621 | * @param pbPktRem The remaining packet data (without the 'v').
|
---|
| 1622 | * @param cbPktRem Size of the remaining packet in bytes.
|
---|
| 1623 | */
|
---|
| 1624 | static int dbgcGdbStubCtxPktProcessV(PGDBSTUBCTX pThis, const uint8_t *pbPktRem, size_t cbPktRem)
|
---|
| 1625 | {
|
---|
| 1626 | /* Determine the end of the identifier, delimiters are '?', ';' or end of packet. */
|
---|
| 1627 | bool fQuery = false;
|
---|
| 1628 | const uint8_t *pbDelim = (const uint8_t *)memchr(pbPktRem, '?', cbPktRem);
|
---|
| 1629 | if (!pbDelim)
|
---|
| 1630 | pbDelim = (const uint8_t *)memchr(pbPktRem, ';', cbPktRem);
|
---|
| 1631 | else
|
---|
| 1632 | fQuery = true;
|
---|
| 1633 |
|
---|
| 1634 | size_t cchId = 0;
|
---|
| 1635 | if (pbDelim) /* Delimiter found, calculate length. */
|
---|
| 1636 | cchId = pbDelim - pbPktRem;
|
---|
| 1637 | else /* Not found, size goes till end of packet. */
|
---|
| 1638 | cchId = cbPktRem;
|
---|
| 1639 |
|
---|
| 1640 | /* Search the query and execute the processor or return an empty reply if not supported. */
|
---|
| 1641 | for (uint32_t i = 0; i < RT_ELEMENTS(g_aVPktProcs); i++)
|
---|
| 1642 | {
|
---|
| 1643 | PCGDBSTUBVPKTPROC pVProc = &g_aVPktProcs[i];
|
---|
| 1644 |
|
---|
| 1645 | if ( pVProc->cchName == cchId
|
---|
| 1646 | && !memcmp(pbPktRem, pVProc->pszName, cchId))
|
---|
| 1647 | {
|
---|
| 1648 | /* Just send the static reply for a query and execute the processor for everything else. */
|
---|
| 1649 | if (fQuery)
|
---|
| 1650 | return dbgcGdbStubCtxReplySend(pThis, pVProc->pszReplyQ, pVProc->cchReplyQ);
|
---|
| 1651 |
|
---|
| 1652 | /* Execute the handler. */
|
---|
| 1653 | return pVProc->pfnProc(pThis, pbPktRem + cchId, cbPktRem - cchId);
|
---|
| 1654 | }
|
---|
| 1655 | }
|
---|
| 1656 |
|
---|
| 1657 | return dbgcGdbStubCtxReplySend(pThis, NULL, 0);
|
---|
| 1658 | }
|
---|
| 1659 |
|
---|
| 1660 |
|
---|
| 1661 | /**
|
---|
[84707] | 1662 | * Processes a 'H<op><thread-id>' packet, sending the appropriate reply.
|
---|
| 1663 | *
|
---|
| 1664 | * @returns Status code.
|
---|
| 1665 | * @param pThis The GDB stub context.
|
---|
| 1666 | * @param pbPktRem The remaining packet data (without the 'H').
|
---|
| 1667 | * @param cbPktRem Size of the remaining packet in bytes.
|
---|
| 1668 | */
|
---|
| 1669 | static int dbgcGdbStubCtxPktProcessH(PGDBSTUBCTX pThis, const uint8_t *pbPktRem, size_t cbPktRem)
|
---|
| 1670 | {
|
---|
| 1671 | int rc = VINF_SUCCESS;
|
---|
| 1672 |
|
---|
| 1673 | if (*pbPktRem == 'g')
|
---|
| 1674 | {
|
---|
[100108] | 1675 | /*Unused: cbPktRem--;*/ RT_NOREF(cbPktRem);
|
---|
[84707] | 1676 | pbPktRem++;
|
---|
| 1677 |
|
---|
| 1678 | /* We know there is an # character denoting the end so the following must return with VWRN_TRAILING_CHARS. */
|
---|
| 1679 | VMCPUID idCpu;
|
---|
| 1680 | rc = RTStrToUInt32Ex((const char *)pbPktRem, NULL /*ppszNext*/, 16, &idCpu);
|
---|
| 1681 | if ( rc == VWRN_TRAILING_CHARS
|
---|
| 1682 | && idCpu > 0)
|
---|
| 1683 | {
|
---|
| 1684 | idCpu--;
|
---|
| 1685 |
|
---|
| 1686 | VMCPUID cCpus = DBGFR3CpuGetCount(pThis->Dbgc.pUVM);
|
---|
| 1687 | if (idCpu < cCpus)
|
---|
| 1688 | {
|
---|
| 1689 | pThis->Dbgc.idCpu = idCpu;
|
---|
| 1690 | rc = dbgcGdbStubCtxReplySendOk(pThis);
|
---|
| 1691 | }
|
---|
| 1692 | else
|
---|
| 1693 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, VERR_NET_PROTOCOL_ERROR);
|
---|
| 1694 | }
|
---|
| 1695 | else
|
---|
| 1696 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, VERR_NET_PROTOCOL_ERROR);
|
---|
| 1697 | }
|
---|
| 1698 | else /* Do not support the 'c' operation for now (will be handled through vCont later on anyway). */
|
---|
| 1699 | rc = dbgcGdbStubCtxReplySend(pThis, NULL, 0);
|
---|
| 1700 |
|
---|
| 1701 | return rc;
|
---|
| 1702 | }
|
---|
| 1703 |
|
---|
| 1704 |
|
---|
| 1705 | /**
|
---|
[84627] | 1706 | * Processes a completely received packet.
|
---|
| 1707 | *
|
---|
| 1708 | * @returns Status code.
|
---|
| 1709 | * @param pThis The GDB stub context.
|
---|
| 1710 | */
|
---|
| 1711 | static int dbgcGdbStubCtxPktProcess(PGDBSTUBCTX pThis)
|
---|
| 1712 | {
|
---|
| 1713 | int rc = VINF_SUCCESS;
|
---|
| 1714 |
|
---|
| 1715 | if (pThis->cbPkt >= 1)
|
---|
| 1716 | {
|
---|
| 1717 | switch (pThis->pbPktBuf[1])
|
---|
| 1718 | {
|
---|
| 1719 | case '!': /* Enabled extended mode. */
|
---|
| 1720 | {
|
---|
| 1721 | pThis->fExtendedMode = true;
|
---|
| 1722 | rc = dbgcGdbStubCtxReplySendOk(pThis);
|
---|
| 1723 | break;
|
---|
| 1724 | }
|
---|
| 1725 | case '?':
|
---|
| 1726 | {
|
---|
| 1727 | /* Return signal state. */
|
---|
| 1728 | rc = dbgcGdbStubCtxReplySendSigTrap(pThis);
|
---|
| 1729 | break;
|
---|
| 1730 | }
|
---|
| 1731 | case 's': /* Single step, response will be sent in the event loop. */
|
---|
| 1732 | {
|
---|
| 1733 | PDBGFADDRESS pStackPop = NULL;
|
---|
| 1734 | RTGCPTR cbStackPop = 0;
|
---|
| 1735 | rc = DBGFR3StepEx(pThis->Dbgc.pUVM, pThis->Dbgc.idCpu, DBGF_STEP_F_INTO, NULL,
|
---|
| 1736 | pStackPop, cbStackPop, 1 /*cMaxSteps*/);
|
---|
| 1737 | if (RT_FAILURE(rc))
|
---|
| 1738 | dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1739 | break;
|
---|
| 1740 | }
|
---|
| 1741 | case 'c': /* Continue, no response */
|
---|
| 1742 | {
|
---|
[86098] | 1743 | if (DBGFR3IsHalted(pThis->Dbgc.pUVM, VMCPUID_ALL))
|
---|
| 1744 | DBGFR3Resume(pThis->Dbgc.pUVM, VMCPUID_ALL);
|
---|
[84627] | 1745 | break;
|
---|
| 1746 | }
|
---|
[84707] | 1747 | case 'H':
|
---|
| 1748 | {
|
---|
| 1749 | rc = dbgcGdbStubCtxPktProcessH(pThis, &pThis->pbPktBuf[2], pThis->cbPkt - 1);
|
---|
| 1750 | break;
|
---|
| 1751 | }
|
---|
| 1752 | case 'T':
|
---|
| 1753 | {
|
---|
| 1754 | rc = dbgcGdbStubCtxReplySendOk(pThis);
|
---|
| 1755 | break;
|
---|
| 1756 | }
|
---|
[84627] | 1757 | case 'g': /* Read general registers. */
|
---|
| 1758 | {
|
---|
| 1759 | uint32_t idxRegMax = 0;
|
---|
| 1760 | size_t cbRegs = 0;
|
---|
| 1761 | for (;;)
|
---|
| 1762 | {
|
---|
[85367] | 1763 | const GDBREGDESC *pReg = &pThis->paRegs[idxRegMax++];
|
---|
[84627] | 1764 | cbRegs += pReg->cBits / 8;
|
---|
| 1765 | if (pReg->enmReg == DBGFREG_SS) /* Up to this seems to belong to the general register set. */
|
---|
| 1766 | break;
|
---|
| 1767 | }
|
---|
| 1768 |
|
---|
| 1769 | size_t cbReplyPkt = cbRegs * 2 + 1; /* One byte needs two characters. */
|
---|
| 1770 | rc = dbgcGdbStubCtxEnsurePktBufSpace(pThis, cbReplyPkt);
|
---|
| 1771 | if (RT_SUCCESS(rc))
|
---|
| 1772 | {
|
---|
| 1773 | size_t cbLeft = cbReplyPkt;
|
---|
| 1774 | uint8_t *pbReply = pThis->pbPktBuf;
|
---|
| 1775 |
|
---|
| 1776 | for (uint32_t i = 0; i < idxRegMax && RT_SUCCESS(rc); i++)
|
---|
| 1777 | {
|
---|
[85367] | 1778 | const GDBREGDESC *pReg = &pThis->paRegs[i];
|
---|
[84627] | 1779 | size_t cbReg = pReg->cBits / 8;
|
---|
| 1780 | union
|
---|
| 1781 | {
|
---|
| 1782 | uint32_t u32;
|
---|
| 1783 | uint64_t u64;
|
---|
| 1784 | uint8_t au8[8];
|
---|
| 1785 | } RegVal;
|
---|
| 1786 |
|
---|
| 1787 | if (pReg->cBits == 32)
|
---|
| 1788 | rc = DBGFR3RegCpuQueryU32(pThis->Dbgc.pUVM, pThis->Dbgc.idCpu, pReg->enmReg, &RegVal.u32);
|
---|
| 1789 | else
|
---|
| 1790 | rc = DBGFR3RegCpuQueryU64(pThis->Dbgc.pUVM, pThis->Dbgc.idCpu, pReg->enmReg, &RegVal.u64);
|
---|
| 1791 |
|
---|
| 1792 | if (RT_SUCCESS(rc))
|
---|
| 1793 | rc = dbgcGdbStubCtxEncodeBinaryAsHex(pbReply, cbLeft, &RegVal.au8[0], cbReg);
|
---|
| 1794 |
|
---|
| 1795 | pbReply += cbReg * 2;
|
---|
| 1796 | cbLeft -= cbReg * 2;
|
---|
| 1797 | }
|
---|
| 1798 |
|
---|
| 1799 | if (RT_SUCCESS(rc))
|
---|
| 1800 | rc = dbgcGdbStubCtxReplySend(pThis, pThis->pbPktBuf, cbReplyPkt);
|
---|
| 1801 | else
|
---|
| 1802 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1803 | }
|
---|
| 1804 |
|
---|
| 1805 | break;
|
---|
| 1806 | }
|
---|
| 1807 | case 'm': /* Read memory. */
|
---|
| 1808 | {
|
---|
| 1809 | uint64_t GdbTgtAddr = 0;
|
---|
| 1810 | const uint8_t *pbPktSep = NULL;
|
---|
| 1811 |
|
---|
| 1812 | rc = dbgcGdbStubCtxParseHexStringAsInteger(&pThis->pbPktBuf[2], pThis->cbPkt - 1, &GdbTgtAddr,
|
---|
| 1813 | ',', &pbPktSep);
|
---|
| 1814 | if (RT_SUCCESS(rc))
|
---|
| 1815 | {
|
---|
| 1816 | size_t cbProcessed = pbPktSep - &pThis->pbPktBuf[2];
|
---|
[84628] | 1817 | uint64_t cbRead = 0;
|
---|
[84627] | 1818 | rc = dbgcGdbStubCtxParseHexStringAsInteger(pbPktSep + 1, pThis->cbPkt - 1 - cbProcessed - 1, &cbRead, GDBSTUB_PKT_END, NULL);
|
---|
| 1819 | if (RT_SUCCESS(rc))
|
---|
| 1820 | {
|
---|
| 1821 | size_t cbReplyPkt = cbRead * 2 + 1; /* One byte needs two characters. */
|
---|
| 1822 |
|
---|
| 1823 | rc = dbgcGdbStubCtxEnsurePktBufSpace(pThis, cbReplyPkt);
|
---|
| 1824 | if (RT_SUCCESS(rc))
|
---|
| 1825 | {
|
---|
| 1826 | uint8_t *pbPktBuf = pThis->pbPktBuf;
|
---|
| 1827 | size_t cbPktBufLeft = cbReplyPkt;
|
---|
| 1828 | DBGFADDRESS AddrRead;
|
---|
| 1829 |
|
---|
| 1830 | DBGFR3AddrFromFlat(pThis->Dbgc.pUVM, &AddrRead, GdbTgtAddr);
|
---|
| 1831 |
|
---|
| 1832 | while ( cbRead
|
---|
| 1833 | && RT_SUCCESS(rc))
|
---|
| 1834 | {
|
---|
| 1835 | uint8_t abTmp[_4K];
|
---|
| 1836 | size_t cbThisRead = RT_MIN(cbRead, sizeof(abTmp));
|
---|
| 1837 |
|
---|
| 1838 | rc = DBGFR3MemRead(pThis->Dbgc.pUVM, pThis->Dbgc.idCpu, &AddrRead, &abTmp[0], cbThisRead);
|
---|
| 1839 | if (RT_FAILURE(rc))
|
---|
| 1840 | break;
|
---|
| 1841 |
|
---|
| 1842 | rc = dbgcGdbStubCtxEncodeBinaryAsHex(pbPktBuf, cbPktBufLeft, &abTmp[0], cbThisRead);
|
---|
| 1843 | if (RT_FAILURE(rc))
|
---|
| 1844 | break;
|
---|
| 1845 |
|
---|
| 1846 | DBGFR3AddrAdd(&AddrRead, cbThisRead);
|
---|
| 1847 | cbRead -= cbThisRead;
|
---|
| 1848 | pbPktBuf += cbThisRead;
|
---|
| 1849 | cbPktBufLeft -= cbThisRead;
|
---|
| 1850 | }
|
---|
| 1851 |
|
---|
| 1852 | if (RT_SUCCESS(rc))
|
---|
| 1853 | rc = dbgcGdbStubCtxReplySend(pThis, pThis->pbPktBuf, cbReplyPkt);
|
---|
| 1854 | else
|
---|
| 1855 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1856 | }
|
---|
| 1857 | else
|
---|
| 1858 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1859 | }
|
---|
| 1860 | else
|
---|
| 1861 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1862 | }
|
---|
| 1863 | else
|
---|
| 1864 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1865 | break;
|
---|
| 1866 | }
|
---|
| 1867 | case 'M': /* Write memory. */
|
---|
| 1868 | {
|
---|
| 1869 | uint64_t GdbTgtAddr = 0;
|
---|
| 1870 | const uint8_t *pbPktSep = NULL;
|
---|
| 1871 |
|
---|
| 1872 | rc = dbgcGdbStubCtxParseHexStringAsInteger(&pThis->pbPktBuf[2], pThis->cbPkt - 1, &GdbTgtAddr,
|
---|
| 1873 | ',', &pbPktSep);
|
---|
| 1874 | if (RT_SUCCESS(rc))
|
---|
| 1875 | {
|
---|
| 1876 | size_t cbProcessed = pbPktSep - &pThis->pbPktBuf[2];
|
---|
[84628] | 1877 | uint64_t cbWrite = 0;
|
---|
[84627] | 1878 | rc = dbgcGdbStubCtxParseHexStringAsInteger(pbPktSep + 1, pThis->cbPkt - 1 - cbProcessed - 1, &cbWrite, ':', &pbPktSep);
|
---|
| 1879 | if (RT_SUCCESS(rc))
|
---|
| 1880 | {
|
---|
| 1881 | cbProcessed = pbPktSep - &pThis->pbPktBuf[2];
|
---|
| 1882 | const uint8_t *pbDataCur = pbPktSep + 1;
|
---|
| 1883 | size_t cbDataLeft = pThis->cbPkt - 1 - cbProcessed - 1 - 1;
|
---|
| 1884 | DBGFADDRESS AddrWrite;
|
---|
| 1885 |
|
---|
| 1886 | DBGFR3AddrFromFlat(pThis->Dbgc.pUVM, &AddrWrite, GdbTgtAddr);
|
---|
| 1887 |
|
---|
| 1888 | while ( cbWrite
|
---|
| 1889 | && RT_SUCCESS(rc))
|
---|
| 1890 | {
|
---|
| 1891 | uint8_t abTmp[_4K];
|
---|
| 1892 | size_t cbThisWrite = RT_MIN(cbWrite, sizeof(abTmp));
|
---|
| 1893 | size_t cbDecoded = 0;
|
---|
| 1894 |
|
---|
| 1895 | rc = dbgcGdbStubCtxParseHexStringAsByteBuf(pbDataCur, cbDataLeft, &abTmp[0], cbThisWrite, &cbDecoded);
|
---|
| 1896 | if (!rc)
|
---|
| 1897 | rc = DBGFR3MemWrite(pThis->Dbgc.pUVM, pThis->Dbgc.idCpu, &AddrWrite, &abTmp[0], cbThisWrite);
|
---|
| 1898 |
|
---|
| 1899 | DBGFR3AddrAdd(&AddrWrite, cbThisWrite);
|
---|
| 1900 | cbWrite -= cbThisWrite;
|
---|
| 1901 | pbDataCur += cbDecoded;
|
---|
| 1902 | cbDataLeft -= cbDecoded;
|
---|
| 1903 | }
|
---|
| 1904 |
|
---|
| 1905 | if (RT_SUCCESS(rc))
|
---|
| 1906 | rc = dbgcGdbStubCtxReplySendOk(pThis);
|
---|
| 1907 | else
|
---|
| 1908 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1909 | }
|
---|
| 1910 | else
|
---|
| 1911 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1912 | }
|
---|
| 1913 | else
|
---|
| 1914 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1915 | break;
|
---|
| 1916 | }
|
---|
| 1917 | case 'p': /* Read a single register */
|
---|
| 1918 | {
|
---|
| 1919 | uint64_t uReg = 0;
|
---|
| 1920 | rc = dbgcGdbStubCtxParseHexStringAsInteger(&pThis->pbPktBuf[2], pThis->cbPkt - 1, &uReg,
|
---|
| 1921 | GDBSTUB_PKT_END, NULL);
|
---|
| 1922 | if (RT_SUCCESS(rc))
|
---|
| 1923 | {
|
---|
| 1924 | DBGFREGVAL RegVal;
|
---|
| 1925 | DBGFREGVALTYPE enmType;
|
---|
[85367] | 1926 | const GDBREGDESC *pReg = dbgcGdbStubRegGet(pThis, uReg);
|
---|
[84627] | 1927 | if (RT_LIKELY(pReg))
|
---|
| 1928 | {
|
---|
| 1929 | rc = DBGFR3RegNmQuery(pThis->Dbgc.pUVM, pThis->Dbgc.idCpu, pReg->pszName, &RegVal, &enmType);
|
---|
| 1930 | if (RT_SUCCESS(rc))
|
---|
| 1931 | {
|
---|
| 1932 | size_t cbReg = pReg->cBits / 8;
|
---|
| 1933 | size_t cbReplyPkt = cbReg * 2 + 1; /* One byte needs two characters. */
|
---|
| 1934 |
|
---|
| 1935 | /* Encode data and send. */
|
---|
| 1936 | rc = dbgcGdbStubCtxEnsurePktBufSpace(pThis, cbReplyPkt);
|
---|
| 1937 | if (RT_SUCCESS(rc))
|
---|
| 1938 | {
|
---|
| 1939 | rc = dbgcGdbStubCtxEncodeBinaryAsHex(pThis->pbPktBuf, pThis->cbPktBufMax, &RegVal.au8[0], cbReg);
|
---|
| 1940 | if (RT_SUCCESS(rc))
|
---|
| 1941 | rc = dbgcGdbStubCtxReplySend(pThis, pThis->pbPktBuf, cbReplyPkt);
|
---|
| 1942 | else
|
---|
| 1943 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1944 | }
|
---|
| 1945 | else
|
---|
| 1946 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1947 | }
|
---|
| 1948 | else
|
---|
| 1949 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1950 | }
|
---|
| 1951 | else
|
---|
| 1952 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, VERR_NET_PROTOCOL_ERROR);
|
---|
| 1953 | }
|
---|
| 1954 | else
|
---|
| 1955 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1956 | break;
|
---|
| 1957 | }
|
---|
| 1958 | case 'P': /* Write a single register */
|
---|
| 1959 | {
|
---|
| 1960 | uint64_t uReg = 0;
|
---|
| 1961 | const uint8_t *pbPktSep = NULL;
|
---|
| 1962 | rc = dbgcGdbStubCtxParseHexStringAsInteger(&pThis->pbPktBuf[2], pThis->cbPkt - 1, &uReg,
|
---|
| 1963 | '=', &pbPktSep);
|
---|
| 1964 | if (RT_SUCCESS(rc))
|
---|
| 1965 | {
|
---|
[85367] | 1966 | const GDBREGDESC *pReg = dbgcGdbStubRegGet(pThis, uReg);
|
---|
[84627] | 1967 |
|
---|
| 1968 | if (pReg)
|
---|
| 1969 | {
|
---|
| 1970 | DBGFREGVAL RegVal;
|
---|
| 1971 | DBGFREGVALTYPE enmValType = pReg->cBits == 64 ? DBGFREGVALTYPE_U64 : DBGFREGVALTYPE_U32;
|
---|
| 1972 | size_t cbProcessed = pbPktSep - &pThis->pbPktBuf[2];
|
---|
| 1973 | rc = dbgcGdbStubCtxParseHexStringAsByteBuf(pbPktSep + 1, pThis->cbPkt - 1 - cbProcessed - 1, &RegVal.au8[0], pReg->cBits / 8, NULL);
|
---|
| 1974 | if (RT_SUCCESS(rc))
|
---|
| 1975 | {
|
---|
| 1976 | rc = DBGFR3RegNmSet(pThis->Dbgc.pUVM, pThis->Dbgc.idCpu, pReg->pszName, &RegVal, enmValType);
|
---|
| 1977 | if (RT_SUCCESS(rc))
|
---|
| 1978 | rc = dbgcGdbStubCtxReplySendOk(pThis);
|
---|
| 1979 | else
|
---|
| 1980 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1981 | }
|
---|
| 1982 | }
|
---|
| 1983 | else
|
---|
| 1984 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, VERR_NET_PROTOCOL_ERROR);
|
---|
| 1985 | }
|
---|
| 1986 | else
|
---|
| 1987 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 1988 | break;
|
---|
| 1989 | }
|
---|
| 1990 | case 'Z': /* Insert a breakpoint/watchpoint. */
|
---|
| 1991 | {
|
---|
| 1992 | GDBSTUBTPTYPE enmTpType = GDBSTUBTPTYPE_INVALID;
|
---|
| 1993 | uint64_t GdbTgtTpAddr = 0;
|
---|
| 1994 | uint64_t uKind = 0;
|
---|
| 1995 |
|
---|
| 1996 | rc = dbgcGdbStubCtxParseTpPktArgs(&pThis->pbPktBuf[2], pThis->cbPkt - 1, &enmTpType, &GdbTgtTpAddr, &uKind);
|
---|
| 1997 | if (RT_SUCCESS(rc))
|
---|
| 1998 | {
|
---|
| 1999 | uint32_t iBp = 0;
|
---|
| 2000 | DBGFADDRESS BpAddr;
|
---|
| 2001 | DBGFR3AddrFromFlat(pThis->Dbgc.pUVM, &BpAddr, GdbTgtTpAddr);
|
---|
| 2002 |
|
---|
| 2003 | switch (enmTpType)
|
---|
| 2004 | {
|
---|
| 2005 | case GDBSTUBTPTYPE_EXEC_SW:
|
---|
| 2006 | {
|
---|
| 2007 | rc = DBGFR3BpSetInt3(pThis->Dbgc.pUVM, pThis->Dbgc.idCpu, &BpAddr,
|
---|
| 2008 | 1 /*iHitTrigger*/, UINT64_MAX /*iHitDisable*/, &iBp);
|
---|
| 2009 | break;
|
---|
| 2010 | }
|
---|
| 2011 | case GDBSTUBTPTYPE_EXEC_HW:
|
---|
| 2012 | {
|
---|
| 2013 | rc = DBGFR3BpSetReg(pThis->Dbgc.pUVM, &BpAddr,
|
---|
| 2014 | 1 /*iHitTrigger*/, UINT64_MAX /*iHitDisable*/,
|
---|
| 2015 | X86_DR7_RW_EO, 1 /*cb*/, &iBp);
|
---|
| 2016 | break;
|
---|
| 2017 | }
|
---|
| 2018 | case GDBSTUBTPTYPE_MEM_ACCESS:
|
---|
| 2019 | case GDBSTUBTPTYPE_MEM_READ:
|
---|
| 2020 | {
|
---|
| 2021 | rc = DBGFR3BpSetReg(pThis->Dbgc.pUVM, &BpAddr,
|
---|
| 2022 | 1 /*iHitTrigger*/, UINT64_MAX /*iHitDisable*/,
|
---|
| 2023 | X86_DR7_RW_RW, uKind /*cb*/, &iBp);
|
---|
| 2024 | break;
|
---|
| 2025 | }
|
---|
| 2026 | case GDBSTUBTPTYPE_MEM_WRITE:
|
---|
| 2027 | {
|
---|
| 2028 | rc = DBGFR3BpSetReg(pThis->Dbgc.pUVM, &BpAddr,
|
---|
| 2029 | 1 /*iHitTrigger*/, UINT64_MAX /*iHitDisable*/,
|
---|
| 2030 | X86_DR7_RW_WO, uKind /*cb*/, &iBp);
|
---|
| 2031 | break;
|
---|
| 2032 | }
|
---|
| 2033 | default:
|
---|
| 2034 | AssertMsgFailed(("Invalid trace point type %d\n", enmTpType));
|
---|
| 2035 | }
|
---|
| 2036 |
|
---|
| 2037 | if (RT_SUCCESS(rc))
|
---|
| 2038 | {
|
---|
| 2039 | rc = dbgcBpAdd(&pThis->Dbgc, iBp, NULL /*pszCmd*/);
|
---|
| 2040 | if (RT_SUCCESS(rc))
|
---|
| 2041 | {
|
---|
[84694] | 2042 | rc = dbgcGdbStubTpRegister(pThis, enmTpType, GdbTgtTpAddr, uKind, iBp);
|
---|
| 2043 | if (RT_SUCCESS(rc))
|
---|
| 2044 | rc = dbgcGdbStubCtxReplySendOk(pThis);
|
---|
| 2045 | else
|
---|
| 2046 | dbgcBpDelete(&pThis->Dbgc, iBp);
|
---|
| 2047 | }
|
---|
| 2048 |
|
---|
| 2049 | if (RT_FAILURE(rc))
|
---|
| 2050 | {
|
---|
[84627] | 2051 | DBGFR3BpClear(pThis->Dbgc.pUVM, iBp);
|
---|
| 2052 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 2053 | }
|
---|
| 2054 | }
|
---|
| 2055 | else
|
---|
| 2056 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 2057 | }
|
---|
| 2058 | else
|
---|
| 2059 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 2060 | break;
|
---|
| 2061 | }
|
---|
| 2062 | case 'z': /* Remove a breakpoint/watchpoint. */
|
---|
| 2063 | {
|
---|
| 2064 | GDBSTUBTPTYPE enmTpType = GDBSTUBTPTYPE_INVALID;
|
---|
| 2065 | uint64_t GdbTgtTpAddr = 0;
|
---|
| 2066 | uint64_t uKind = 0;
|
---|
| 2067 |
|
---|
| 2068 | rc = dbgcGdbStubCtxParseTpPktArgs(&pThis->pbPktBuf[2], pThis->cbPkt - 1, &enmTpType, &GdbTgtTpAddr, &uKind);
|
---|
| 2069 | if (RT_SUCCESS(rc))
|
---|
| 2070 | {
|
---|
[84694] | 2071 | PGDBSTUBTP pTp = dbgcGdbStubTpFind(pThis, enmTpType, GdbTgtTpAddr, uKind);
|
---|
| 2072 | if (pTp)
|
---|
| 2073 | {
|
---|
| 2074 | int rc2 = DBGFR3BpClear(pThis->Dbgc.pUVM, pTp->iBp);
|
---|
| 2075 | if (RT_SUCCESS(rc2) || rc2 == VERR_DBGF_BP_NOT_FOUND)
|
---|
| 2076 | dbgcBpDelete(&pThis->Dbgc, pTp->iBp);
|
---|
[84627] | 2077 |
|
---|
[84694] | 2078 | if (RT_SUCCESS(rc2))
|
---|
| 2079 | {
|
---|
| 2080 | dbgcGdbStubTpDeregister(pTp);
|
---|
| 2081 | rc = dbgcGdbStubCtxReplySendOk(pThis);
|
---|
| 2082 | }
|
---|
| 2083 | else
|
---|
| 2084 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 2085 | }
|
---|
[84627] | 2086 | else
|
---|
[84694] | 2087 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, VERR_NOT_FOUND);
|
---|
[84627] | 2088 | }
|
---|
| 2089 | else
|
---|
| 2090 | rc = dbgcGdbStubCtxReplySendErrSts(pThis, rc);
|
---|
| 2091 | break;
|
---|
| 2092 | }
|
---|
| 2093 | case 'q': /* Query packet */
|
---|
| 2094 | {
|
---|
| 2095 | rc = dbgcGdbStubCtxPktProcessQuery(pThis, &pThis->pbPktBuf[2], pThis->cbPkt - 1);
|
---|
| 2096 | break;
|
---|
| 2097 | }
|
---|
| 2098 | case 'v': /* Multiletter identifier (verbose?) */
|
---|
| 2099 | {
|
---|
| 2100 | rc = dbgcGdbStubCtxPktProcessV(pThis, &pThis->pbPktBuf[2], pThis->cbPkt - 1);
|
---|
| 2101 | break;
|
---|
| 2102 | }
|
---|
| 2103 | case 'R': /* Restart target. */
|
---|
| 2104 | {
|
---|
| 2105 | rc = dbgcGdbStubCtxReplySend(pThis, NULL, 0);
|
---|
| 2106 | break;
|
---|
| 2107 | }
|
---|
| 2108 | case 'k': /* Kill target. */
|
---|
| 2109 | {
|
---|
| 2110 | /* This is what the 'harakiri' command is doing. */
|
---|
| 2111 | for (;;)
|
---|
| 2112 | exit(126);
|
---|
| 2113 | break;
|
---|
| 2114 | }
|
---|
[84690] | 2115 | case 'D': /* Detach */
|
---|
| 2116 | {
|
---|
| 2117 | rc = dbgcGdbStubCtxReplySendOk(pThis);
|
---|
| 2118 | if (RT_SUCCESS(rc))
|
---|
| 2119 | rc = VERR_DBGC_QUIT;
|
---|
| 2120 | break;
|
---|
| 2121 | }
|
---|
[84627] | 2122 | default:
|
---|
| 2123 | /* Not supported, send empty reply. */
|
---|
| 2124 | rc = dbgcGdbStubCtxReplySend(pThis, NULL, 0);
|
---|
| 2125 | }
|
---|
| 2126 | }
|
---|
| 2127 |
|
---|
| 2128 | return rc;
|
---|
| 2129 | }
|
---|
| 2130 |
|
---|
| 2131 |
|
---|
| 2132 | /**
|
---|
| 2133 | * Resets the packet buffer.
|
---|
| 2134 | *
|
---|
| 2135 | * @param pThis The GDB stub context.
|
---|
| 2136 | */
|
---|
| 2137 | static void dbgcGdbStubCtxPktBufReset(PGDBSTUBCTX pThis)
|
---|
| 2138 | {
|
---|
| 2139 | pThis->offPktBuf = 0;
|
---|
| 2140 | pThis->cbPkt = 0;
|
---|
| 2141 | pThis->cbChksumRecvLeft = 2;
|
---|
| 2142 | }
|
---|
| 2143 |
|
---|
| 2144 |
|
---|
| 2145 | /**
|
---|
| 2146 | * Resets the given GDB stub context to the initial state.
|
---|
| 2147 | *
|
---|
| 2148 | * @param pThis The GDB stub context.
|
---|
| 2149 | */
|
---|
| 2150 | static void dbgcGdbStubCtxReset(PGDBSTUBCTX pThis)
|
---|
| 2151 | {
|
---|
| 2152 | pThis->enmState = GDBSTUBRECVSTATE_PACKET_WAIT_FOR_START;
|
---|
| 2153 | dbgcGdbStubCtxPktBufReset(pThis);
|
---|
| 2154 | }
|
---|
| 2155 |
|
---|
| 2156 |
|
---|
| 2157 | /**
|
---|
| 2158 | * Searches for the start character in the current data buffer.
|
---|
| 2159 | *
|
---|
| 2160 | * @returns Status code.
|
---|
| 2161 | * @param pThis The GDB stub context.
|
---|
| 2162 | * @param cbData Number of new bytes in the packet buffer.
|
---|
| 2163 | * @param pcbProcessed Where to store the amount of bytes processed.
|
---|
| 2164 | */
|
---|
| 2165 | static int dbgcGdbStubCtxPktBufSearchStart(PGDBSTUBCTX pThis, size_t cbData, size_t *pcbProcessed)
|
---|
| 2166 | {
|
---|
| 2167 | int rc = VINF_SUCCESS;
|
---|
| 2168 | const uint8_t *pbStart = (const uint8_t *)memchr(pThis->pbPktBuf, GDBSTUB_PKT_START, cbData);
|
---|
| 2169 | if (pbStart)
|
---|
| 2170 | {
|
---|
| 2171 | /* Found the start character, align the start to the beginning of the packet buffer and advance the state machine. */
|
---|
| 2172 | memmove(pThis->pbPktBuf, pbStart, cbData - (pbStart - pThis->pbPktBuf));
|
---|
| 2173 | pThis->enmState = GDBSTUBRECVSTATE_PACKET_RECEIVE_BODY;
|
---|
| 2174 | *pcbProcessed = (uintptr_t)(pbStart - pThis->pbPktBuf);
|
---|
| 2175 | pThis->offPktBuf = 0;
|
---|
| 2176 | }
|
---|
| 2177 | else
|
---|
| 2178 | {
|
---|
| 2179 | /* Check for out of band characters. */
|
---|
| 2180 | if (memchr(pThis->pbPktBuf, GDBSTUB_OOB_INTERRUPT, cbData) != NULL)
|
---|
| 2181 | {
|
---|
| 2182 | /* Stop target and send packet to indicate the target has stopped. */
|
---|
[86098] | 2183 | if (!DBGFR3IsHalted(pThis->Dbgc.pUVM, VMCPUID_ALL))
|
---|
| 2184 | rc = DBGFR3Halt(pThis->Dbgc.pUVM, VMCPUID_ALL);
|
---|
[84627] | 2185 | /* The reply will be send in the event loop. */
|
---|
| 2186 | }
|
---|
| 2187 |
|
---|
| 2188 | /* Not found, ignore the received data and reset the packet buffer. */
|
---|
| 2189 | dbgcGdbStubCtxPktBufReset(pThis);
|
---|
| 2190 | *pcbProcessed = cbData;
|
---|
| 2191 | }
|
---|
| 2192 |
|
---|
| 2193 | return rc;
|
---|
| 2194 | }
|
---|
| 2195 |
|
---|
| 2196 |
|
---|
| 2197 | /**
|
---|
| 2198 | * Searches for the end character in the current data buffer.
|
---|
| 2199 | *
|
---|
| 2200 | * @returns Status code.
|
---|
| 2201 | * @param pThis The GDB stub context.
|
---|
| 2202 | * @param cbData Number of new bytes in the packet buffer.
|
---|
| 2203 | * @param pcbProcessed Where to store the amount of bytes processed.
|
---|
| 2204 | */
|
---|
| 2205 | static int dbgcGdbStubCtxPktBufSearchEnd(PGDBSTUBCTX pThis, size_t cbData, size_t *pcbProcessed)
|
---|
| 2206 | {
|
---|
| 2207 | const uint8_t *pbEnd = (const uint8_t *)memchr(&pThis->pbPktBuf[pThis->offPktBuf], GDBSTUB_PKT_END, cbData);
|
---|
| 2208 | if (pbEnd)
|
---|
| 2209 | {
|
---|
| 2210 | /* Found the end character, next comes the checksum. */
|
---|
| 2211 | pThis->enmState = GDBSTUBRECVSTATE_PACKET_RECEIVE_CHECKSUM;
|
---|
| 2212 |
|
---|
| 2213 | *pcbProcessed = (uintptr_t)(pbEnd - &pThis->pbPktBuf[pThis->offPktBuf]) + 1;
|
---|
| 2214 | pThis->offPktBuf += *pcbProcessed;
|
---|
| 2215 | pThis->cbPkt = pThis->offPktBuf - 1; /* Don't account for the start and end character. */
|
---|
| 2216 | }
|
---|
| 2217 | else
|
---|
| 2218 | {
|
---|
| 2219 | /* Not found, still in the middle of a packet. */
|
---|
| 2220 | /** @todo Look for out of band characters. */
|
---|
| 2221 | *pcbProcessed = cbData;
|
---|
| 2222 | pThis->offPktBuf += cbData;
|
---|
| 2223 | }
|
---|
| 2224 |
|
---|
| 2225 | return VINF_SUCCESS;
|
---|
| 2226 | }
|
---|
| 2227 |
|
---|
| 2228 |
|
---|
| 2229 | /**
|
---|
| 2230 | * Processes the checksum.
|
---|
| 2231 | *
|
---|
| 2232 | * @returns Status code.
|
---|
| 2233 | * @param pThis The GDB stub context.
|
---|
| 2234 | * @param cbData Number of new bytes in the packet buffer.
|
---|
| 2235 | * @param pcbProcessed Where to store the amount of bytes processed.
|
---|
| 2236 | */
|
---|
| 2237 | static int dbgcGdbStubCtxPktBufProcessChksum(PGDBSTUBCTX pThis, size_t cbData, size_t *pcbProcessed)
|
---|
| 2238 | {
|
---|
| 2239 | int rc = VINF_SUCCESS;
|
---|
| 2240 | size_t cbChksumProcessed = (cbData < pThis->cbChksumRecvLeft) ? cbData : pThis->cbChksumRecvLeft;
|
---|
| 2241 |
|
---|
| 2242 | pThis->cbChksumRecvLeft -= cbChksumProcessed;
|
---|
| 2243 | if (!pThis->cbChksumRecvLeft)
|
---|
| 2244 | {
|
---|
| 2245 | /* Verify checksum of the whole packet. */
|
---|
| 2246 | uint8_t uChkSum = dbgcGdbStubCtxChrToHex(pThis->pbPktBuf[pThis->offPktBuf]) << 4
|
---|
| 2247 | | dbgcGdbStubCtxChrToHex(pThis->pbPktBuf[pThis->offPktBuf + 1]);
|
---|
| 2248 |
|
---|
| 2249 | uint8_t uSum = 0;
|
---|
[84630] | 2250 | for (size_t i = 1; i < pThis->cbPkt; i++)
|
---|
[84627] | 2251 | uSum += pThis->pbPktBuf[i];
|
---|
| 2252 |
|
---|
| 2253 | if (uSum == uChkSum)
|
---|
| 2254 | {
|
---|
| 2255 | /* Checksum matches, send acknowledge and continue processing the complete payload. */
|
---|
| 2256 | char chAck = '+';
|
---|
| 2257 | rc = dbgcGdbStubCtxWrite(pThis, &chAck, sizeof(chAck));
|
---|
| 2258 | if (RT_SUCCESS(rc))
|
---|
| 2259 | rc = dbgcGdbStubCtxPktProcess(pThis);
|
---|
| 2260 | }
|
---|
| 2261 | else
|
---|
| 2262 | {
|
---|
| 2263 | /* Send NACK and reset for the next packet. */
|
---|
| 2264 | char chAck = '-';
|
---|
| 2265 | rc = dbgcGdbStubCtxWrite(pThis, &chAck, sizeof(chAck));
|
---|
| 2266 | }
|
---|
| 2267 |
|
---|
| 2268 | dbgcGdbStubCtxReset(pThis);
|
---|
| 2269 | }
|
---|
| 2270 |
|
---|
| 2271 | *pcbProcessed += cbChksumProcessed;
|
---|
| 2272 | return rc;
|
---|
| 2273 | }
|
---|
| 2274 |
|
---|
| 2275 |
|
---|
| 2276 | /**
|
---|
| 2277 | * Process read data in the packet buffer based on the current state.
|
---|
| 2278 | *
|
---|
| 2279 | * @returns Status code.
|
---|
| 2280 | * @param pThis The GDB stub context.
|
---|
| 2281 | * @param cbData Number of new bytes in the packet buffer.
|
---|
| 2282 | */
|
---|
| 2283 | static int dbgcGdbStubCtxPktBufProcess(PGDBSTUBCTX pThis, size_t cbData)
|
---|
| 2284 | {
|
---|
| 2285 | int rc = VINF_SUCCESS;
|
---|
| 2286 |
|
---|
| 2287 | while ( cbData
|
---|
| 2288 | && RT_SUCCESS(rc))
|
---|
| 2289 | {
|
---|
| 2290 | size_t cbProcessed = 0;
|
---|
| 2291 |
|
---|
| 2292 | switch (pThis->enmState)
|
---|
| 2293 | {
|
---|
| 2294 | case GDBSTUBRECVSTATE_PACKET_WAIT_FOR_START:
|
---|
| 2295 | {
|
---|
| 2296 | rc = dbgcGdbStubCtxPktBufSearchStart(pThis, cbData, &cbProcessed);
|
---|
| 2297 | break;
|
---|
| 2298 | }
|
---|
| 2299 | case GDBSTUBRECVSTATE_PACKET_RECEIVE_BODY:
|
---|
| 2300 | {
|
---|
| 2301 | rc = dbgcGdbStubCtxPktBufSearchEnd(pThis, cbData, &cbProcessed);
|
---|
| 2302 | break;
|
---|
| 2303 | }
|
---|
| 2304 | case GDBSTUBRECVSTATE_PACKET_RECEIVE_CHECKSUM:
|
---|
| 2305 | {
|
---|
| 2306 | rc = dbgcGdbStubCtxPktBufProcessChksum(pThis, cbData, &cbProcessed);
|
---|
| 2307 | break;
|
---|
| 2308 | }
|
---|
| 2309 | default:
|
---|
| 2310 | /* Should never happen. */
|
---|
| 2311 | rc = VERR_INTERNAL_ERROR;
|
---|
| 2312 | }
|
---|
| 2313 |
|
---|
| 2314 | cbData -= cbProcessed;
|
---|
| 2315 | }
|
---|
| 2316 |
|
---|
| 2317 | return rc;
|
---|
| 2318 | }
|
---|
| 2319 |
|
---|
| 2320 |
|
---|
| 2321 | /**
|
---|
| 2322 | * Receive data and processes complete packets.
|
---|
| 2323 | *
|
---|
| 2324 | * @returns Status code.
|
---|
| 2325 | * @param pThis The GDB stub context.
|
---|
| 2326 | */
|
---|
| 2327 | static int dbgcGdbStubCtxRecv(PGDBSTUBCTX pThis)
|
---|
| 2328 | {
|
---|
| 2329 | /*
|
---|
| 2330 | * Read in 32 bytes chunks for now (need some peek API to get the amount of bytes actually available
|
---|
| 2331 | * to make it a bit more optimized).
|
---|
| 2332 | */
|
---|
| 2333 | int rc = dbgcGdbStubCtxEnsurePktBufSpace(pThis, 32);
|
---|
| 2334 | if (RT_SUCCESS(rc))
|
---|
| 2335 | {
|
---|
| 2336 | size_t cbThisRead = 32;
|
---|
[86327] | 2337 | rc = pThis->Dbgc.pIo->pfnRead(pThis->Dbgc.pIo, &pThis->pbPktBuf[pThis->offPktBuf], cbThisRead, &cbThisRead);
|
---|
[84627] | 2338 | if (RT_SUCCESS(rc))
|
---|
| 2339 | rc = dbgcGdbStubCtxPktBufProcess(pThis, cbThisRead);
|
---|
| 2340 | }
|
---|
| 2341 |
|
---|
| 2342 | return rc;
|
---|
| 2343 | }
|
---|
| 2344 |
|
---|
| 2345 |
|
---|
| 2346 | /**
|
---|
| 2347 | * Processes debugger events.
|
---|
| 2348 | *
|
---|
| 2349 | * @returns VBox status code.
|
---|
| 2350 | * @param pThis The GDB stub context data.
|
---|
| 2351 | * @param pEvent Pointer to event data.
|
---|
| 2352 | */
|
---|
| 2353 | static int dbgcGdbStubCtxProcessEvent(PGDBSTUBCTX pThis, PCDBGFEVENT pEvent)
|
---|
| 2354 | {
|
---|
| 2355 | /*
|
---|
| 2356 | * Process the event.
|
---|
| 2357 | */
|
---|
[84653] | 2358 | PDBGC pDbgc = &pThis->Dbgc;
|
---|
[84627] | 2359 | pThis->Dbgc.pszScratch = &pThis->Dbgc.achInput[0];
|
---|
| 2360 | pThis->Dbgc.iArg = 0;
|
---|
| 2361 | int rc = VINF_SUCCESS;
|
---|
| 2362 | switch (pEvent->enmType)
|
---|
| 2363 | {
|
---|
| 2364 | /*
|
---|
| 2365 | * The first part is events we have initiated with commands.
|
---|
| 2366 | */
|
---|
| 2367 | case DBGFEVENT_HALT_DONE:
|
---|
| 2368 | {
|
---|
| 2369 | rc = dbgcGdbStubCtxReplySendSigTrap(pThis);
|
---|
| 2370 | break;
|
---|
| 2371 | }
|
---|
| 2372 |
|
---|
| 2373 |
|
---|
| 2374 | /*
|
---|
| 2375 | * The second part is events which can occur at any time.
|
---|
| 2376 | */
|
---|
| 2377 | case DBGFEVENT_FATAL_ERROR:
|
---|
| 2378 | {
|
---|
| 2379 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbf event: Fatal error! (%s)\n",
|
---|
| 2380 | dbgcGetEventCtx(pEvent->enmCtx));
|
---|
| 2381 | if (RT_SUCCESS(rc))
|
---|
| 2382 | rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
|
---|
| 2383 | break;
|
---|
| 2384 | }
|
---|
| 2385 |
|
---|
| 2386 | case DBGFEVENT_BREAKPOINT:
|
---|
| 2387 | case DBGFEVENT_BREAKPOINT_IO:
|
---|
| 2388 | case DBGFEVENT_BREAKPOINT_MMIO:
|
---|
| 2389 | case DBGFEVENT_BREAKPOINT_HYPER:
|
---|
| 2390 | {
|
---|
[86755] | 2391 | rc = dbgcBpExec(pDbgc, pEvent->u.Bp.hBp);
|
---|
[84660] | 2392 | switch (rc)
|
---|
| 2393 | {
|
---|
| 2394 | case VERR_DBGC_BP_NOT_FOUND:
|
---|
| 2395 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: Unknown breakpoint %u! (%s)\n",
|
---|
[86755] | 2396 | pEvent->u.Bp.hBp, dbgcGetEventCtx(pEvent->enmCtx));
|
---|
[84660] | 2397 | break;
|
---|
| 2398 |
|
---|
| 2399 | case VINF_DBGC_BP_NO_COMMAND:
|
---|
| 2400 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: Breakpoint %u! (%s)\n",
|
---|
[86755] | 2401 | pEvent->u.Bp.hBp, dbgcGetEventCtx(pEvent->enmCtx));
|
---|
[84660] | 2402 | break;
|
---|
| 2403 |
|
---|
| 2404 | case VINF_BUFFER_OVERFLOW:
|
---|
| 2405 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: Breakpoint %u! Command too long to execute! (%s)\n",
|
---|
[86755] | 2406 | pEvent->u.Bp.hBp, dbgcGetEventCtx(pEvent->enmCtx));
|
---|
[84660] | 2407 | break;
|
---|
| 2408 |
|
---|
| 2409 | default:
|
---|
| 2410 | break;
|
---|
| 2411 | }
|
---|
[86098] | 2412 | if (RT_SUCCESS(rc) && DBGFR3IsHalted(pDbgc->pUVM, VMCPUID_ALL))
|
---|
[84660] | 2413 | {
|
---|
| 2414 | rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
|
---|
| 2415 |
|
---|
| 2416 | /* Set the resume flag to ignore the breakpoint when resuming execution. */
|
---|
| 2417 | if ( RT_SUCCESS(rc)
|
---|
| 2418 | && pEvent->enmType == DBGFEVENT_BREAKPOINT)
|
---|
| 2419 | rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r eflags.rf = 1");
|
---|
| 2420 | }
|
---|
| 2421 |
|
---|
[103433] | 2422 | if (RT_FAILURE(rc))
|
---|
| 2423 | pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "Executing the breakpoint %u (%s) failed with %Rrc!\n",
|
---|
| 2424 | pEvent->u.Bp.hBp, dbgcGetEventCtx(pEvent->enmCtx), rc);
|
---|
| 2425 |
|
---|
[84627] | 2426 | rc = dbgcGdbStubCtxReplySendSigTrap(pThis);
|
---|
| 2427 | break;
|
---|
| 2428 | }
|
---|
| 2429 |
|
---|
| 2430 | case DBGFEVENT_STEPPED:
|
---|
| 2431 | case DBGFEVENT_STEPPED_HYPER:
|
---|
| 2432 | {
|
---|
| 2433 | rc = dbgcGdbStubCtxReplySendSigTrap(pThis);
|
---|
| 2434 | break;
|
---|
| 2435 | }
|
---|
| 2436 |
|
---|
| 2437 | case DBGFEVENT_ASSERTION_HYPER:
|
---|
| 2438 | {
|
---|
| 2439 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
|
---|
| 2440 | "\ndbgf event: Hypervisor Assertion! (%s)\n"
|
---|
| 2441 | "%s"
|
---|
| 2442 | "%s"
|
---|
| 2443 | "\n",
|
---|
| 2444 | dbgcGetEventCtx(pEvent->enmCtx),
|
---|
| 2445 | pEvent->u.Assert.pszMsg1,
|
---|
| 2446 | pEvent->u.Assert.pszMsg2);
|
---|
| 2447 | if (RT_SUCCESS(rc))
|
---|
| 2448 | rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
|
---|
| 2449 | break;
|
---|
| 2450 | }
|
---|
| 2451 |
|
---|
| 2452 | case DBGFEVENT_DEV_STOP:
|
---|
| 2453 | {
|
---|
| 2454 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
|
---|
| 2455 | "\n"
|
---|
| 2456 | "dbgf event: DBGFSTOP (%s)\n"
|
---|
| 2457 | "File: %s\n"
|
---|
| 2458 | "Line: %d\n"
|
---|
| 2459 | "Function: %s\n",
|
---|
| 2460 | dbgcGetEventCtx(pEvent->enmCtx),
|
---|
| 2461 | pEvent->u.Src.pszFile,
|
---|
| 2462 | pEvent->u.Src.uLine,
|
---|
| 2463 | pEvent->u.Src.pszFunction);
|
---|
| 2464 | if (RT_SUCCESS(rc) && pEvent->u.Src.pszMessage && *pEvent->u.Src.pszMessage)
|
---|
| 2465 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
|
---|
| 2466 | "Message: %s\n",
|
---|
| 2467 | pEvent->u.Src.pszMessage);
|
---|
| 2468 | if (RT_SUCCESS(rc))
|
---|
| 2469 | rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
|
---|
| 2470 | break;
|
---|
| 2471 | }
|
---|
| 2472 |
|
---|
| 2473 |
|
---|
| 2474 | case DBGFEVENT_INVALID_COMMAND:
|
---|
| 2475 | {
|
---|
| 2476 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf/dbgc error: Invalid command event!\n");
|
---|
| 2477 | break;
|
---|
| 2478 | }
|
---|
| 2479 |
|
---|
| 2480 | case DBGFEVENT_POWERING_OFF:
|
---|
| 2481 | {
|
---|
| 2482 | pThis->Dbgc.fReady = false;
|
---|
[86327] | 2483 | pThis->Dbgc.pIo->pfnSetReady(pThis->Dbgc.pIo, false);
|
---|
[84627] | 2484 | rc = VERR_GENERAL_FAILURE;
|
---|
| 2485 | break;
|
---|
| 2486 | }
|
---|
| 2487 |
|
---|
| 2488 | default:
|
---|
| 2489 | {
|
---|
| 2490 | /*
|
---|
| 2491 | * Probably a generic event. Look it up to find its name.
|
---|
| 2492 | */
|
---|
| 2493 | PCDBGCSXEVT pEvtDesc = dbgcEventLookup(pEvent->enmType);
|
---|
| 2494 | if (pEvtDesc)
|
---|
| 2495 | {
|
---|
| 2496 | if (pEvtDesc->enmKind == kDbgcSxEventKind_Interrupt)
|
---|
| 2497 | {
|
---|
| 2498 | Assert(pEvtDesc->pszDesc);
|
---|
| 2499 | Assert(pEvent->u.Generic.cArgs == 1);
|
---|
| 2500 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: %s no %#llx! (%s)\n",
|
---|
| 2501 | pEvtDesc->pszDesc, pEvent->u.Generic.auArgs[0], pEvtDesc->pszName);
|
---|
| 2502 | }
|
---|
| 2503 | else if (pEvtDesc->fFlags & DBGCSXEVT_F_BUGCHECK)
|
---|
| 2504 | {
|
---|
| 2505 | Assert(pEvent->u.Generic.cArgs >= 5);
|
---|
| 2506 | char szDetails[512];
|
---|
| 2507 | DBGFR3FormatBugCheck(pDbgc->pUVM, szDetails, sizeof(szDetails), pEvent->u.Generic.auArgs[0],
|
---|
| 2508 | pEvent->u.Generic.auArgs[1], pEvent->u.Generic.auArgs[2],
|
---|
| 2509 | pEvent->u.Generic.auArgs[3], pEvent->u.Generic.auArgs[4]);
|
---|
| 2510 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: %s %s%s!\n%s", pEvtDesc->pszName,
|
---|
| 2511 | pEvtDesc->pszDesc ? "- " : "", pEvtDesc->pszDesc ? pEvtDesc->pszDesc : "",
|
---|
| 2512 | szDetails);
|
---|
| 2513 | }
|
---|
| 2514 | else if ( (pEvtDesc->fFlags & DBGCSXEVT_F_TAKE_ARG)
|
---|
| 2515 | || pEvent->u.Generic.cArgs > 1
|
---|
| 2516 | || ( pEvent->u.Generic.cArgs == 1
|
---|
| 2517 | && pEvent->u.Generic.auArgs[0] != 0))
|
---|
| 2518 | {
|
---|
| 2519 | if (pEvtDesc->pszDesc)
|
---|
| 2520 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: %s - %s!",
|
---|
| 2521 | pEvtDesc->pszName, pEvtDesc->pszDesc);
|
---|
| 2522 | else
|
---|
| 2523 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: %s!", pEvtDesc->pszName);
|
---|
| 2524 | if (pEvent->u.Generic.cArgs <= 1)
|
---|
| 2525 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, " arg=%#llx\n", pEvent->u.Generic.auArgs[0]);
|
---|
| 2526 | else
|
---|
| 2527 | {
|
---|
| 2528 | for (uint32_t i = 0; i < pEvent->u.Generic.cArgs; i++)
|
---|
| 2529 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, " args[%u]=%#llx", i, pEvent->u.Generic.auArgs[i]);
|
---|
| 2530 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\n");
|
---|
| 2531 | }
|
---|
| 2532 | }
|
---|
| 2533 | else
|
---|
| 2534 | {
|
---|
| 2535 | if (pEvtDesc->pszDesc)
|
---|
| 2536 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: %s - %s!\n",
|
---|
| 2537 | pEvtDesc->pszName, pEvtDesc->pszDesc);
|
---|
| 2538 | else
|
---|
| 2539 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: %s!\n", pEvtDesc->pszName);
|
---|
| 2540 | }
|
---|
| 2541 | }
|
---|
| 2542 | else
|
---|
| 2543 | rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf/dbgc error: Unknown event %d!\n", pEvent->enmType);
|
---|
| 2544 | break;
|
---|
| 2545 | }
|
---|
| 2546 | }
|
---|
| 2547 |
|
---|
| 2548 | return rc;
|
---|
| 2549 | }
|
---|
| 2550 |
|
---|
| 2551 |
|
---|
| 2552 | /**
|
---|
| 2553 | * Run the debugger console.
|
---|
| 2554 | *
|
---|
| 2555 | * @returns VBox status code.
|
---|
[84628] | 2556 | * @param pThis Pointer to the GDB stub context.
|
---|
[84627] | 2557 | */
|
---|
[103433] | 2558 | static int dbgcGdbStubRun(PGDBSTUBCTX pThis)
|
---|
[84627] | 2559 | {
|
---|
[85367] | 2560 | /* Select the register set based on the CPU mode. */
|
---|
| 2561 | CPUMMODE enmMode = DBGCCmdHlpGetCpuMode(&pThis->Dbgc.CmdHlp);
|
---|
| 2562 | switch (enmMode)
|
---|
| 2563 | {
|
---|
| 2564 | case CPUMMODE_PROTECTED:
|
---|
| 2565 | pThis->paRegs = &g_aGdbRegs32[0];
|
---|
| 2566 | pThis->cRegs = RT_ELEMENTS(g_aGdbRegs32);
|
---|
| 2567 | break;
|
---|
| 2568 | case CPUMMODE_LONG:
|
---|
| 2569 | pThis->paRegs = &g_aGdbRegs64[0];
|
---|
| 2570 | pThis->cRegs = RT_ELEMENTS(g_aGdbRegs64);
|
---|
| 2571 | break;
|
---|
| 2572 | case CPUMMODE_REAL:
|
---|
| 2573 | default:
|
---|
| 2574 | return DBGCCmdHlpPrintf(&pThis->Dbgc.CmdHlp, "error: Invalid CPU mode %d.\n", enmMode);
|
---|
| 2575 | }
|
---|
| 2576 |
|
---|
[84627] | 2577 | /*
|
---|
| 2578 | * We're ready for commands now.
|
---|
| 2579 | */
|
---|
| 2580 | pThis->Dbgc.fReady = true;
|
---|
[86327] | 2581 | pThis->Dbgc.pIo->pfnSetReady(pThis->Dbgc.pIo, true);
|
---|
[84627] | 2582 |
|
---|
| 2583 | /*
|
---|
| 2584 | * Main Debugger Loop.
|
---|
| 2585 | *
|
---|
| 2586 | * This loop will either block on waiting for input or on waiting on
|
---|
| 2587 | * debug events. If we're forwarding the log we cannot wait for long
|
---|
| 2588 | * before we must flush the log.
|
---|
| 2589 | */
|
---|
| 2590 | int rc;
|
---|
| 2591 | for (;;)
|
---|
| 2592 | {
|
---|
| 2593 | rc = VERR_SEM_OUT_OF_TURN;
|
---|
| 2594 | if (pThis->Dbgc.pUVM)
|
---|
| 2595 | rc = DBGFR3QueryWaitable(pThis->Dbgc.pUVM);
|
---|
| 2596 |
|
---|
| 2597 | if (RT_SUCCESS(rc))
|
---|
| 2598 | {
|
---|
| 2599 | /*
|
---|
| 2600 | * Wait for a debug event.
|
---|
| 2601 | */
|
---|
[86098] | 2602 | DBGFEVENT Event;
|
---|
| 2603 | rc = DBGFR3EventWait(pThis->Dbgc.pUVM, 32, &Event);
|
---|
[84627] | 2604 | if (RT_SUCCESS(rc))
|
---|
| 2605 | {
|
---|
[86098] | 2606 | rc = dbgcGdbStubCtxProcessEvent(pThis, &Event);
|
---|
[84627] | 2607 | if (RT_FAILURE(rc))
|
---|
| 2608 | break;
|
---|
| 2609 | }
|
---|
| 2610 | else if (rc != VERR_TIMEOUT)
|
---|
| 2611 | break;
|
---|
| 2612 |
|
---|
| 2613 | /*
|
---|
| 2614 | * Check for input.
|
---|
| 2615 | */
|
---|
[86327] | 2616 | if (pThis->Dbgc.pIo->pfnInput(pThis->Dbgc.pIo, 0))
|
---|
[84627] | 2617 | {
|
---|
| 2618 | rc = dbgcGdbStubCtxRecv(pThis);
|
---|
| 2619 | if (RT_FAILURE(rc))
|
---|
| 2620 | break;
|
---|
| 2621 | }
|
---|
| 2622 | }
|
---|
| 2623 | else if (rc == VERR_SEM_OUT_OF_TURN)
|
---|
| 2624 | {
|
---|
| 2625 | /*
|
---|
| 2626 | * Wait for input.
|
---|
| 2627 | */
|
---|
[86327] | 2628 | if (pThis->Dbgc.pIo->pfnInput(pThis->Dbgc.pIo, 1000))
|
---|
[84627] | 2629 | {
|
---|
| 2630 | rc = dbgcGdbStubCtxRecv(pThis);
|
---|
| 2631 | if (RT_FAILURE(rc))
|
---|
| 2632 | break;
|
---|
| 2633 | }
|
---|
| 2634 | }
|
---|
| 2635 | else
|
---|
| 2636 | break;
|
---|
| 2637 | }
|
---|
| 2638 |
|
---|
| 2639 | return rc;
|
---|
| 2640 | }
|
---|
| 2641 |
|
---|
| 2642 |
|
---|
| 2643 | /**
|
---|
[84660] | 2644 | * @copydoc DBGC::pfnOutput
|
---|
[84653] | 2645 | */
|
---|
| 2646 | static DECLCALLBACK(int) dbgcOutputGdb(void *pvUser, const char *pachChars, size_t cbChars)
|
---|
| 2647 | {
|
---|
| 2648 | PGDBSTUBCTX pThis = (PGDBSTUBCTX)pvUser;
|
---|
| 2649 |
|
---|
| 2650 | pThis->fOutput = true;
|
---|
| 2651 | int rc = dbgcGdbStubCtxReplySendBegin(pThis);
|
---|
| 2652 | if (RT_SUCCESS(rc))
|
---|
| 2653 | {
|
---|
| 2654 | uint8_t chConOut = 'O';
|
---|
| 2655 | rc = dbgcGdbStubCtxReplySendData(pThis, &chConOut, sizeof(chConOut));
|
---|
| 2656 | if (RT_SUCCESS(rc))
|
---|
| 2657 | {
|
---|
| 2658 | /* Convert the characters to hex. */
|
---|
| 2659 | const char *pachCur = pachChars;
|
---|
| 2660 |
|
---|
| 2661 | while ( cbChars
|
---|
| 2662 | && RT_SUCCESS(rc))
|
---|
| 2663 | {
|
---|
| 2664 | uint8_t achHex[512 + 1];
|
---|
| 2665 | size_t cbThisSend = RT_MIN((sizeof(achHex) - 1) / 2, cbChars); /* Each character needs two bytes. */
|
---|
| 2666 |
|
---|
| 2667 | rc = dbgcGdbStubCtxEncodeBinaryAsHex(&achHex[0], cbThisSend * 2 + 1, pachCur, cbThisSend);
|
---|
| 2668 | if (RT_SUCCESS(rc))
|
---|
| 2669 | rc = dbgcGdbStubCtxReplySendData(pThis, &achHex[0], cbThisSend * 2);
|
---|
| 2670 |
|
---|
| 2671 | pachCur += cbThisSend;
|
---|
| 2672 | cbChars -= cbThisSend;
|
---|
| 2673 | }
|
---|
| 2674 | }
|
---|
| 2675 |
|
---|
| 2676 | dbgcGdbStubCtxReplySendEnd(pThis);
|
---|
| 2677 | }
|
---|
| 2678 |
|
---|
| 2679 | return rc;
|
---|
| 2680 | }
|
---|
| 2681 |
|
---|
| 2682 |
|
---|
| 2683 | /**
|
---|
[84627] | 2684 | * Creates a GDB stub context instance with the given backend.
|
---|
| 2685 | *
|
---|
| 2686 | * @returns VBox status code.
|
---|
| 2687 | * @param ppGdbStubCtx Where to store the pointer to the GDB stub context instance on success.
|
---|
[86327] | 2688 | * @param pIo Pointer to the I/O callback table.
|
---|
[84627] | 2689 | * @param fFlags Flags controlling the behavior.
|
---|
| 2690 | */
|
---|
[86327] | 2691 | static int dbgcGdbStubCtxCreate(PPGDBSTUBCTX ppGdbStubCtx, PCDBGCIO pIo, unsigned fFlags)
|
---|
[84627] | 2692 | {
|
---|
| 2693 | /*
|
---|
| 2694 | * Validate input.
|
---|
| 2695 | */
|
---|
[86327] | 2696 | AssertPtrReturn(pIo, VERR_INVALID_POINTER);
|
---|
[84627] | 2697 | AssertMsgReturn(!fFlags, ("%#x", fFlags), VERR_INVALID_PARAMETER);
|
---|
| 2698 |
|
---|
| 2699 | /*
|
---|
| 2700 | * Allocate and initialize.
|
---|
| 2701 | */
|
---|
| 2702 | PGDBSTUBCTX pThis = (PGDBSTUBCTX)RTMemAllocZ(sizeof(*pThis));
|
---|
| 2703 | if (!pThis)
|
---|
| 2704 | return VERR_NO_MEMORY;
|
---|
| 2705 |
|
---|
| 2706 | dbgcInitCmdHlp(&pThis->Dbgc);
|
---|
| 2707 | /*
|
---|
| 2708 | * This is compied from the native debug console (will be used for monitor commands)
|
---|
| 2709 | * in DBGCConsole.cpp. Try to keep both functions in sync.
|
---|
| 2710 | */
|
---|
[86327] | 2711 | pThis->Dbgc.pIo = pIo;
|
---|
[84653] | 2712 | pThis->Dbgc.pfnOutput = dbgcOutputGdb;
|
---|
| 2713 | pThis->Dbgc.pvOutputUser = pThis;
|
---|
[84627] | 2714 | pThis->Dbgc.pVM = NULL;
|
---|
| 2715 | pThis->Dbgc.pUVM = NULL;
|
---|
| 2716 | pThis->Dbgc.idCpu = 0;
|
---|
| 2717 | pThis->Dbgc.hDbgAs = DBGF_AS_GLOBAL;
|
---|
| 2718 | pThis->Dbgc.pszEmulation = "CodeView/WinDbg";
|
---|
| 2719 | pThis->Dbgc.paEmulationCmds = &g_aCmdsCodeView[0];
|
---|
| 2720 | pThis->Dbgc.cEmulationCmds = g_cCmdsCodeView;
|
---|
| 2721 | pThis->Dbgc.paEmulationFuncs = &g_aFuncsCodeView[0];
|
---|
| 2722 | pThis->Dbgc.cEmulationFuncs = g_cFuncsCodeView;
|
---|
| 2723 | //pThis->Dbgc.fLog = false;
|
---|
| 2724 | pThis->Dbgc.fRegTerse = true;
|
---|
| 2725 | pThis->Dbgc.fStepTraceRegs = true;
|
---|
| 2726 | //pThis->Dbgc.cPagingHierarchyDumps = 0;
|
---|
| 2727 | //pThis->Dbgc.DisasmPos = {0};
|
---|
| 2728 | //pThis->Dbgc.SourcePos = {0};
|
---|
| 2729 | //pThis->Dbgc.DumpPos = {0};
|
---|
| 2730 | pThis->Dbgc.pLastPos = &pThis->Dbgc.DisasmPos;
|
---|
| 2731 | //pThis->Dbgc.cbDumpElement = 0;
|
---|
| 2732 | //pThis->Dbgc.cVars = 0;
|
---|
| 2733 | //pThis->Dbgc.paVars = NULL;
|
---|
| 2734 | //pThis->Dbgc.pPlugInHead = NULL;
|
---|
| 2735 | //pThis->Dbgc.pFirstBp = NULL;
|
---|
| 2736 | //pThis->Dbgc.abSearch = {0};
|
---|
| 2737 | //pThis->Dbgc.cbSearch = 0;
|
---|
| 2738 | pThis->Dbgc.cbSearchUnit = 1;
|
---|
| 2739 | pThis->Dbgc.cMaxSearchHits = 1;
|
---|
| 2740 | //pThis->Dbgc.SearchAddr = {0};
|
---|
| 2741 | //pThis->Dbgc.cbSearchRange = 0;
|
---|
| 2742 |
|
---|
| 2743 | //pThis->Dbgc.uInputZero = 0;
|
---|
| 2744 | //pThis->Dbgc.iRead = 0;
|
---|
| 2745 | //pThis->Dbgc.iWrite = 0;
|
---|
| 2746 | //pThis->Dbgc.cInputLines = 0;
|
---|
| 2747 | //pThis->Dbgc.fInputOverflow = false;
|
---|
| 2748 | pThis->Dbgc.fReady = true;
|
---|
| 2749 | pThis->Dbgc.pszScratch = &pThis->Dbgc.achScratch[0];
|
---|
| 2750 | //pThis->Dbgc.iArg = 0;
|
---|
| 2751 | //pThis->Dbgc.rcOutput = 0;
|
---|
| 2752 | //pThis->Dbgc.rcCmd = 0;
|
---|
| 2753 |
|
---|
| 2754 | //pThis->Dbgc.pszHistoryFile = NULL;
|
---|
| 2755 | //pThis->Dbgc.pszGlobalInitScript = NULL;
|
---|
| 2756 | //pThis->Dbgc.pszLocalInitScript = NULL;
|
---|
| 2757 |
|
---|
| 2758 | dbgcEvalInit();
|
---|
| 2759 |
|
---|
| 2760 | /* Init the GDB stub specific parts. */
|
---|
[84707] | 2761 | pThis->cbPktBufMax = 0;
|
---|
| 2762 | pThis->pbPktBuf = NULL;
|
---|
| 2763 | pThis->fFeatures = GDBSTUBCTX_FEATURES_F_TGT_DESC;
|
---|
| 2764 | pThis->pachTgtXmlDesc = NULL;
|
---|
| 2765 | pThis->cbTgtXmlDesc = 0;
|
---|
| 2766 | pThis->fExtendedMode = false;
|
---|
| 2767 | pThis->fOutput = false;
|
---|
| 2768 | pThis->fInThrdInfoQuery = false;
|
---|
[84694] | 2769 | RTListInit(&pThis->LstTps);
|
---|
[84627] | 2770 | dbgcGdbStubCtxReset(pThis);
|
---|
| 2771 |
|
---|
| 2772 | *ppGdbStubCtx = pThis;
|
---|
| 2773 | return VINF_SUCCESS;
|
---|
| 2774 | }
|
---|
| 2775 |
|
---|
| 2776 |
|
---|
| 2777 | /**
|
---|
| 2778 | * Destroys the given GDB stub context.
|
---|
| 2779 | *
|
---|
| 2780 | * @param pThis The GDB stub context to destroy.
|
---|
| 2781 | */
|
---|
| 2782 | static void dbgcGdbStubDestroy(PGDBSTUBCTX pThis)
|
---|
| 2783 | {
|
---|
| 2784 | AssertPtr(pThis);
|
---|
| 2785 |
|
---|
| 2786 | /* Detach from the VM. */
|
---|
| 2787 | if (pThis->Dbgc.pUVM)
|
---|
| 2788 | DBGFR3Detach(pThis->Dbgc.pUVM);
|
---|
| 2789 |
|
---|
| 2790 | /* Free config strings. */
|
---|
| 2791 | RTStrFree(pThis->Dbgc.pszGlobalInitScript);
|
---|
| 2792 | pThis->Dbgc.pszGlobalInitScript = NULL;
|
---|
| 2793 | RTStrFree(pThis->Dbgc.pszLocalInitScript);
|
---|
| 2794 | pThis->Dbgc.pszLocalInitScript = NULL;
|
---|
| 2795 | RTStrFree(pThis->Dbgc.pszHistoryFile);
|
---|
| 2796 | pThis->Dbgc.pszHistoryFile = NULL;
|
---|
| 2797 |
|
---|
| 2798 | /* Finally, free the instance memory. */
|
---|
| 2799 | RTMemFree(pThis);
|
---|
| 2800 | }
|
---|
| 2801 |
|
---|
| 2802 |
|
---|
[86327] | 2803 | DECL_HIDDEN_CALLBACK(int) dbgcGdbStubRunloop(PUVM pUVM, PCDBGCIO pIo, unsigned fFlags)
|
---|
[84627] | 2804 | {
|
---|
| 2805 | /*
|
---|
| 2806 | * Validate input.
|
---|
| 2807 | */
|
---|
| 2808 | AssertPtrNullReturn(pUVM, VERR_INVALID_VM_HANDLE);
|
---|
| 2809 | PVM pVM = NULL;
|
---|
| 2810 | if (pUVM)
|
---|
| 2811 | {
|
---|
| 2812 | pVM = VMR3GetVM(pUVM);
|
---|
| 2813 | AssertPtrReturn(pVM, VERR_INVALID_VM_HANDLE);
|
---|
| 2814 | }
|
---|
| 2815 |
|
---|
| 2816 | /*
|
---|
| 2817 | * Allocate and initialize instance data
|
---|
| 2818 | */
|
---|
| 2819 | PGDBSTUBCTX pThis;
|
---|
[86327] | 2820 | int rc = dbgcGdbStubCtxCreate(&pThis, pIo, fFlags);
|
---|
[84627] | 2821 | if (RT_FAILURE(rc))
|
---|
| 2822 | return rc;
|
---|
| 2823 | if (!HMR3IsEnabled(pUVM) && !NEMR3IsEnabled(pUVM))
|
---|
| 2824 | pThis->Dbgc.hDbgAs = DBGF_AS_RC_AND_GC_GLOBAL;
|
---|
| 2825 |
|
---|
| 2826 | /*
|
---|
| 2827 | * Attach to the specified VM.
|
---|
| 2828 | */
|
---|
| 2829 | if (RT_SUCCESS(rc) && pUVM)
|
---|
| 2830 | {
|
---|
| 2831 | rc = DBGFR3Attach(pUVM);
|
---|
| 2832 | if (RT_SUCCESS(rc))
|
---|
| 2833 | {
|
---|
| 2834 | pThis->Dbgc.pVM = pVM;
|
---|
| 2835 | pThis->Dbgc.pUVM = pUVM;
|
---|
| 2836 | pThis->Dbgc.idCpu = 0;
|
---|
| 2837 | }
|
---|
| 2838 | else
|
---|
| 2839 | rc = pThis->Dbgc.CmdHlp.pfnVBoxError(&pThis->Dbgc.CmdHlp, rc, "When trying to attach to VM %p\n", pThis->Dbgc.pVM);
|
---|
| 2840 | }
|
---|
| 2841 |
|
---|
| 2842 | /*
|
---|
| 2843 | * Load plugins.
|
---|
| 2844 | */
|
---|
| 2845 | if (RT_SUCCESS(rc))
|
---|
| 2846 | {
|
---|
| 2847 | if (pVM)
|
---|
| 2848 | DBGFR3PlugInLoadAll(pThis->Dbgc.pUVM);
|
---|
| 2849 | dbgcEventInit(&pThis->Dbgc);
|
---|
| 2850 | //dbgcRunInitScripts(pDbgc); Not yet
|
---|
| 2851 |
|
---|
[86098] | 2852 | if (!DBGFR3IsHalted(pThis->Dbgc.pUVM, VMCPUID_ALL))
|
---|
| 2853 | rc = DBGFR3Halt(pThis->Dbgc.pUVM, VMCPUID_ALL);
|
---|
[84627] | 2854 |
|
---|
| 2855 | /*
|
---|
| 2856 | * Run the debugger main loop.
|
---|
| 2857 | */
|
---|
| 2858 | rc = dbgcGdbStubRun(pThis);
|
---|
| 2859 | dbgcEventTerm(&pThis->Dbgc);
|
---|
| 2860 | }
|
---|
| 2861 |
|
---|
| 2862 | /*
|
---|
| 2863 | * Cleanup console debugger session.
|
---|
| 2864 | */
|
---|
| 2865 | dbgcGdbStubDestroy(pThis);
|
---|
| 2866 | return rc == VERR_DBGC_QUIT ? VINF_SUCCESS : rc;
|
---|
| 2867 | }
|
---|
| 2868 |
|
---|