/* Derived from source code of TrueCrypt 7.1a, which is Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed by the TrueCrypt License 3.0. Modifications and additions to the original source code (contained in this file) and all other portions of this file are Copyright (c) 2013-2017 IDRIX and are governed by the Apache License 2.0 the full text of which is contained in the file License.txt included in VeraCrypt binary and source code distribution packages. */ #include "BootDefs.h" #include "BootMemory.h" static uint32 MemoryMapContValue; static bool GetMemoryMapEntry (BiosMemoryMapEntry &entry) { static const uint32 function = 0x0000E820UL; static const uint32 magic = 0x534D4150UL; static const uint32 bufferSize = sizeof (BiosMemoryMapEntry); bool carry = false; uint32 resultMagic; uint32 resultSize; __asm { push es lea di, function TC_ASM_MOV_EAX_DI lea di, MemoryMapContValue TC_ASM_MOV_EBX_DI lea di, bufferSize TC_ASM_MOV_ECX_DI lea di, magic TC_ASM_MOV_EDX_DI lea di, MemoryMapContValue TC_ASM_MOV_DI_ECX // Use alternative segment to prevent memory corruption caused by buggy BIOSes push TC_BOOT_LOADER_ALT_SEGMENT pop es mov di, 0 int 0x15 jnc no_carry mov carry, true no_carry: lea di, resultMagic TC_ASM_MOV_DI_EAX lea di, MemoryMapContValue TC_ASM_MOV_DI_EBX lea di, resultSize TC_ASM_MOV_DI_ECX pop es } CopyMemory (TC_BOOT_LOADER_ALT_SEGMENT, 0, &entry, sizeof (entry)); // BIOS may set CF at the end of the list if (carry) MemoryMapContValue = 0; return resultMagic == magic && resultSize == bufferSize; } bool GetFirstBiosMemoryMapEntry (BiosMemoryMapEntry &entry) { MemoryMapContValue = 0; return GetMemoryMapEntry (entry); } bool GetNextBiosMemoryMapEntry (BiosMemoryMapEntry &entry) { if (MemoryMapContValue == 0) return false; return GetMemoryMapEntry (entry); } '>commitdiff
path: root/src/Core/Unix/CoreServiceRequest.h
blob: b6798e413e2d9c5189d0d1e64aa30760e634383f (plain) 
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