VirtualBox

source: vbox/trunk/src/VBox/Runtime/testcase/tstLdrDisasmTest.cpp@ 62584

Last change on this file since 62584 was 62477, checked in by vboxsync, 8 years ago

(C) 2016

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id Revision
File size: 6.1 KB
Line 
1/* $Id: tstLdrDisasmTest.cpp 62477 2016-07-22 18:27:37Z vboxsync $ */
2/** @file
3 * IPRT - RTLdr test object.
4 *
5 * We use precompiled versions of this object for testing all the loaders.
6 *
7 * This is not supposed to be pretty or usable code, just something which
8 * make life difficult for the loader.
9 */
10
11/*
12 * Copyright (C) 2006-2016 Oracle Corporation
13 *
14 * This file is part of VirtualBox Open Source Edition (OSE), as
15 * available from http://www.virtualbox.org. This file is free software;
16 * you can redistribute it and/or modify it under the terms of the GNU
17 * General Public License (GPL) as published by the Free Software
18 * Foundation, in version 2 as it comes in the "COPYING" file of the
19 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
20 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
21 *
22 * The contents of this file may alternatively be used under the terms
23 * of the Common Development and Distribution License Version 1.0
24 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
25 * VirtualBox OSE distribution, in which case the provisions of the
26 * CDDL are applicable instead of those of the GPL.
27 *
28 * You may elect to license modified versions of this file under the
29 * terms and conditions of either the GPL or the CDDL or both.
30 */
31
32
33
34/*********************************************************************************************************************************
35* Header Files *
36*********************************************************************************************************************************/
37#include <VBox/dis.h>
38#include <VBox/disopcode.h>
39#include <iprt/string.h>
40
41#if defined(IN_RING0) && !defined(RT_OS_WINDOWS) /* Too lazy to make import libs. */
42extern "C" DECLIMPORT(int) MyPrintf(const char *pszFormat, ...);
43# define MY_PRINTF(a) MyPrintf a
44#else
45# define MY_PRINTF(a) do {} while (0)
46#endif
47
48
49/*********************************************************************************************************************************
50* Global Variables *
51*********************************************************************************************************************************/
52
53/* 32-bit code */
54static const uint8_t g_ab32BitCode[] =
55{
56 0x55, // 1000ab50 55 push ebp
57 0x8b,0xec, // 1000ab51 8bec mov ebp,esp
58 0x8b,0x45,0x08, // 1000ab53 8b4508 mov eax,dword ptr [ebp+8]
59 0x81,0x38,0x07,0x07,// 1000ab56 813807076419 cmp dword ptr [eax],19640707h
60 0x64,0x19,
61 0x75,0x09, // 1000ab5c 7509 jne kLdr!kLdrModMap+0x17 (1000ab67)
62 0x8b,0x4d,0x08, // 1000ab5e 8b4d08 mov ecx,dword ptr [ebp+8]
63 0x83,0x79,0x2c,0x00,// 1000ab61 83792c00 cmp dword ptr [ecx+2Ch],0
64 0x75,0x07, // 1000ab65 7507 jne kLdr!kLdrModMap+0x1e (1000ab6e)
65 0xb8,0xc0,0x68,0x06,// 1000ab67 b8c0680600 mov eax,668C0h
66 0x00,
67 0xeb,0x14, // 1000ab6c eb14 jmp kLdr!kLdrModMap+0x32 (1000ab82)
68 0x33,0xd2, // 1000ab6e 33d2 xor edx,edx
69 0x75,0xe1, // 1000ab70 75e1 jne kLdr!kLdrModMap+0x3 (1000ab53)
70 0x8b,0x45,0x08, // 1000ab72 8b4508 mov eax,dword ptr [ebp+8]
71 0x50, // 1000ab75 50 push eax
72 0x8b,0x4d,0x08, // 1000ab76 8b4d08 mov ecx,dword ptr [ebp+8]
73 0x8b,0x51,0x2c, // 1000ab79 8b512c mov edx,dword ptr [ecx+2Ch]
74 0xff,0x52,0x3c, // 1000ab7c ff523c call dword ptr [edx+3Ch]
75 0x83,0xc4,0x04, // 1000ab7f 83c404 add esp,4
76 0x5d, // 1000ab82 5d pop ebp
77 0xc3, // 1000ab83 c3 ret
78 0xcc
79};
80
81
82/**
83 * @callback_method_impl{FNDISREADBYTES}
84 */
85static DECLCALLBACK(int) DisasmTest1ReadCode(PDISCPUSTATE pDis, uint8_t offInstr, uint8_t cbMinRead, uint8_t cbMaxRead)
86{
87 size_t cb = cbMaxRead;
88 if (cb + pDis->uInstrAddr + offInstr > sizeof(g_ab32BitCode))
89 cb = cbMinRead;
90 memcpy(&pDis->abInstr[offInstr], &g_ab32BitCode[pDis->uInstrAddr + offInstr], cb);
91 pDis->cbCachedInstr = offInstr + (uint8_t)cb;
92 return VINF_SUCCESS;
93}
94
95
96/*
97 * Use an inline function here just to test '__textcoal_nt' sections on darwin.
98 */
99inline int MyDisasm(uintptr_t CodeIndex, PDISCPUSTATE pCpu, uint32_t *pcb)
100{
101 uint32_t cb;
102 int rc = DISInstrWithReader(CodeIndex, DISCPUMODE_32BIT, DisasmTest1ReadCode, 0, pCpu, &cb);
103 *pcb = cb;
104 MY_PRINTF(("DISCoreOneEx -> rc=%d cb=%d Cpu: bOpCode=%#x pCurInstr=%p (42=%d)\n", \
105 rc, cb, pCpu->bOpCode, pCpu->pCurInstr, 42)); \
106 return rc;
107}
108
109
110extern "C" DECLEXPORT(int) DisasmTest1(void)
111{
112 DISCPUSTATE Cpu;
113 uintptr_t CodeIndex = 0;
114 uint32_t cb;
115 int rc;
116 MY_PRINTF(("DisasmTest1: %p\n", &DisasmTest1));
117
118 memset(&Cpu, 0, sizeof(Cpu));
119
120#define DISAS_AND_CHECK(cbInstr, enmOp) \
121 do { \
122 rc = MyDisasm(CodeIndex, &Cpu, &cb); \
123 if (RT_FAILURE(rc)) \
124 return CodeIndex | 0xf000; \
125 if (Cpu.pCurInstr->uOpcode != (enmOp)) \
126 return CodeIndex| 0xe000; \
127 if (cb != (cbInstr)) \
128 return CodeIndex | 0xd000; \
129 CodeIndex += cb; \
130 } while (0)
131
132 DISAS_AND_CHECK(1, OP_PUSH);
133 DISAS_AND_CHECK(2, OP_MOV);
134 DISAS_AND_CHECK(3, OP_MOV);
135 DISAS_AND_CHECK(6, OP_CMP);
136 DISAS_AND_CHECK(2, OP_JNE);
137 DISAS_AND_CHECK(3, OP_MOV);
138 DISAS_AND_CHECK(4, OP_CMP);
139 DISAS_AND_CHECK(2, OP_JNE);
140 DISAS_AND_CHECK(5, OP_MOV);
141 DISAS_AND_CHECK(2, OP_JMP);
142 DISAS_AND_CHECK(2, OP_XOR);
143 DISAS_AND_CHECK(2, OP_JNE);
144 DISAS_AND_CHECK(3, OP_MOV);
145 DISAS_AND_CHECK(1, OP_PUSH);
146 DISAS_AND_CHECK(3, OP_MOV);
147 DISAS_AND_CHECK(3, OP_MOV);
148 DISAS_AND_CHECK(3, OP_CALL);
149 DISAS_AND_CHECK(3, OP_ADD);
150 DISAS_AND_CHECK(1, OP_POP);
151 DISAS_AND_CHECK(1, OP_RETN);
152 DISAS_AND_CHECK(1, OP_INT3);
153
154 return rc;
155}
156
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