/* $Id: tstLdrDisasmTest.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */ /** @file * IPRT - RTLdr test object. * * We use precompiled versions of this object for testing all the loaders. * * This is not supposed to be pretty or usable code, just something which * make life difficult for the loader. */ /* * Copyright (C) 2006-2020 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #include #include #include #include #if defined(IN_RING0) # define MY_PRINTF(a) SUPR0Printf a #else # define MY_PRINTF(a) do {} while (0) #endif /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /* 32-bit code */ static const uint8_t g_ab32BitCode[] = { 0x55, // 1000ab50 55 push ebp 0x8b,0xec, // 1000ab51 8bec mov ebp,esp 0x8b,0x45,0x08, // 1000ab53 8b4508 mov eax,dword ptr [ebp+8] 0x81,0x38,0x07,0x07,// 1000ab56 813807076419 cmp dword ptr [eax],19640707h 0x64,0x19, 0x75,0x09, // 1000ab5c 7509 jne kLdr!kLdrModMap+0x17 (1000ab67) 0x8b,0x4d,0x08, // 1000ab5e 8b4d08 mov ecx,dword ptr [ebp+8] 0x83,0x79,0x2c,0x00,// 1000ab61 83792c00 cmp dword ptr [ecx+2Ch],0 0x75,0x07, // 1000ab65 7507 jne kLdr!kLdrModMap+0x1e (1000ab6e) 0xb8,0xc0,0x68,0x06,// 1000ab67 b8c0680600 mov eax,668C0h 0x00, 0xeb,0x14, // 1000ab6c eb14 jmp kLdr!kLdrModMap+0x32 (1000ab82) 0x33,0xd2, // 1000ab6e 33d2 xor edx,edx 0x75,0xe1, // 1000ab70 75e1 jne kLdr!kLdrModMap+0x3 (1000ab53) 0x8b,0x45,0x08, // 1000ab72 8b4508 mov eax,dword ptr [ebp+8] 0x50, // 1000ab75 50 push eax 0x8b,0x4d,0x08, // 1000ab76 8b4d08 mov ecx,dword ptr [ebp+8] 0x8b,0x51,0x2c, // 1000ab79 8b512c mov edx,dword ptr [ecx+2Ch] 0xff,0x52,0x3c, // 1000ab7c ff523c call dword ptr [edx+3Ch] 0x83,0xc4,0x04, // 1000ab7f 83c404 add esp,4 0x5d, // 1000ab82 5d pop ebp 0xc3, // 1000ab83 c3 ret 0xcc }; /** * @callback_method_impl{FNDISREADBYTES} */ static DECLCALLBACK(int) DisasmTest1ReadCode(PDISCPUSTATE pDis, uint8_t offInstr, uint8_t cbMinRead, uint8_t cbMaxRead) { size_t cb = cbMaxRead; if (cb + pDis->uInstrAddr + offInstr > sizeof(g_ab32BitCode)) cb = cbMinRead; memcpy(&pDis->abInstr[offInstr], &g_ab32BitCode[pDis->uInstrAddr + offInstr], cb); pDis->cbCachedInstr = offInstr + (uint8_t)cb; return VINF_SUCCESS; } /* * Use an inline function here just to test '__textcoal_nt' sections on darwin. */ inline int MyDisasm(uintptr_t CodeIndex, PDISCPUSTATE pCpu, uint32_t *pcb) { uint32_t cb; int rc = DISInstrWithReader(CodeIndex, DISCPUMODE_32BIT, DisasmTest1ReadCode, 0, pCpu, &cb); *pcb = cb; MY_PRINTF(("DISCoreOneEx -> rc=%d cb=%d Cpu: bOpCode=%#x pCurInstr=%p (42=%d)\n", \ rc, cb, pCpu->bOpCode, pCpu->pCurInstr, 42)); \ return rc; } extern "C" DECLEXPORT(int) DisasmTest1(void) { DISCPUSTATE Cpu; uintptr_t CodeIndex = 0; uint32_t cb; int rc; MY_PRINTF(("DisasmTest1: %p\n", &DisasmTest1)); #if defined(IN_RING0) MY_PRINTF(("GIP: g_pSUPGlobalInfoPage=%p\n", g_pSUPGlobalInfoPage)); MY_PRINTF(("GIP: magic=%#x version=%#x mode=%d cCpus=%d\n", g_pSUPGlobalInfoPage->u32Magic, g_pSUPGlobalInfoPage->u32Version, g_pSUPGlobalInfoPage->u32Mode, g_pSUPGlobalInfoPage->cCpus)); if (g_pSUPGlobalInfoPage->u32Magic != SUPGLOBALINFOPAGE_MAGIC) return 0xc001; if (g_pSUPGlobalInfoPage->u32Version != SUPGLOBALINFOPAGE_VERSION) return 0xc002; if (g_pSUPGlobalInfoPage->u32Mode != SUPGIPMODE_INVARIANT_TSC) return 0xc003; if (g_pSUPGlobalInfoPage->cCpus != 42) return 0xc004; #endif memset(&Cpu, 0, sizeof(Cpu)); #define DISAS_AND_CHECK(cbInstr, enmOp) \ do { \ rc = MyDisasm(CodeIndex, &Cpu, &cb); \ if (RT_FAILURE(rc)) \ return CodeIndex | 0xf000; \ if (Cpu.pCurInstr->uOpcode != (enmOp)) \ return CodeIndex| 0xe000; \ if (cb != (cbInstr)) \ return CodeIndex | 0xd000; \ CodeIndex += cb; \ } while (0) DISAS_AND_CHECK(1, OP_PUSH); DISAS_AND_CHECK(2, OP_MOV); DISAS_AND_CHECK(3, OP_MOV); DISAS_AND_CHECK(6, OP_CMP); DISAS_AND_CHECK(2, OP_JNE); DISAS_AND_CHECK(3, OP_MOV); DISAS_AND_CHECK(4, OP_CMP); DISAS_AND_CHECK(2, OP_JNE); DISAS_AND_CHECK(5, OP_MOV); DISAS_AND_CHECK(2, OP_JMP); DISAS_AND_CHECK(2, OP_XOR); DISAS_AND_CHECK(2, OP_JNE); DISAS_AND_CHECK(3, OP_MOV); DISAS_AND_CHECK(1, OP_PUSH); DISAS_AND_CHECK(3, OP_MOV); DISAS_AND_CHECK(3, OP_MOV); DISAS_AND_CHECK(3, OP_CALL); DISAS_AND_CHECK(3, OP_ADD); DISAS_AND_CHECK(1, OP_POP); DISAS_AND_CHECK(1, OP_RETN); DISAS_AND_CHECK(1, OP_INT3); return rc; }