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Exe File Format

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These can be identified by the letters "MZ" at the beginning of the file in ASCII. 16-bit New Executable Introduced with the multitasking MS-DOS 4.0 and also used by 16-bit OS/2 To determine the number of entries in the Microsoft linker-generated debug directory, divide the size of the debug directory (found in the size field of the data directory entry) by the Since the import address table is in a writeable section, it's relatively easy to interc current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to DWORD SizeOfHeapReserve The amount of virtual memory to reserve for the initial process heap. his comment is here

DWORD SizeOfInitializedData This is supposedly the total size of all the sections that are composed of initialized data (not including code segments.) However, it doesn't seem to be consistent with what Here is the PE Optional Header presented as a C data structure: struct PEOptHeader { /* char is 1 byte short is 2 bytes long is 4 bytes */ short signature; There are two types of linking that can be used: static and dynamic. Text is available under the Creative Commons Attribution-ShareAlike License.; additional terms may apply. http://whatis.techtarget.com/fileformat/EXE-Executable-file-program

Exe File On Mac

So I deciphered it on my own, and will describe parts of it here in addition to the PE format. When coding with WINNT.H, it's not uncommon to have expressions like this: Copy pNTHeader-> OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress; To help make logical sense of the information in WINNT.H, read the Portable Executable and Common Some sections contain code or data that your program declared and uses directly, while other data sections are created for you by the linker and librarian, and contain information vital to The default is for data sections to be nonshared, meaning that each process using a DLL gets its own copy of this section's data.

Data Backup ( Find Out More About This Site ) cold backup (offline backup) Cold backups are ideal for disaster recovery because they protect important data. Forwarding is achieved by making an RVA in the AddressOfFunctions array point into the section which contains the export directory, something that normal exports should not do. DWORD PointerToLinenumbers This is the file-based offset of the line number table. Exe File Format Specification In an NE file, your program's code and data are stored in distinct "segments" in the file.

Microsoft. 15 November 2006. I'll explain this in a minute. Most section names start with a . (such as ".text"), but this is not a requirement, as some PE documentation would have you believe. http://www.delorie.com/djgpp/doc/exe/ Apache Flink Apache Flink is an in-memory and disk-based distributed data processing platform for use in big data streaming applications.

The linker combines all the .bss sections in the OBJ and LIB files into one .bss section in the EXE. Exe Means Virus All Rights Reserved,Copyright 1999 - 2016, TechTarget About Us Contact Us OverviewSite Index Privacy policy AdvertisersBusiness partnersTechTarget events Media kit TechTarget Corporate site Reprints Site map FileFormat.Info You are in FileFormat.Info» share|improve this answer edited Apr 15 '11 at 17:27 answered Sep 30 '09 at 0:51 Michael 40.8k582118 Damn, beat me to it! :) –Nick Bedford Sep 30 '09 at It is important to remember that the addresses obtained from a disassembly of a module will not always match up to the addresses seen in a debugger as the program is

Exe Virus

Always appears to be set to 0x010B. http://whatis.techtarget.com/fileformat/EXE-Executable-file-program Usually, this isn't filled in. 14-15 Initial value of the IP register. 16-17 Initial value of the CS register, relative to the segment the program was loaded at. 18-19 Offset of Exe File On Mac These sections don't need to have specific values at program startup, hence the term uninitialized data. .exe File Opener Hot Network Questions Have we attempted to experimentally confirm gravitational time dilation?

Each RVA points to a zero terminated ASCII string, each being the name of an export. http://seforum.net/exe-file/exe-file-extension-fix.html This is an RVA, and usually can usually be found in the .text section. It's called "portable" because all the implementations of Windows NT on various platforms (x86, MIPS®, Alpha, and so on) use the same executable format. In a PE file, when you call a function in another module (for example, GetMessage in USER32.DLL), the CALL instruction emitted by the compiler doesn't transfer control directly to the function Exe Meaning

While sections are analogous to 32-bit segments, they really aren't individual segments. This stub is a tiny program that prints out something to the effect of "This program cannot be run in MS-DOS mode." So if you run a Win32-based program in an Microsoft. weblink All file types, file format descriptions, and programs listed on this page have been individually researched and verified by the FileInfo team.

These can be of any name or value. An In-depth Look Into The Win32 Portable Executable File Format It's interesting to note what's missing from the information stored for each section. All you need to know in this situation is where the loader mapped the file into memory.

For various reasons, you cannot declare that "The function in this dynamic library will always exist in memory here".

Mixed 16/32/64-bit Linear Executable Introduced with OS/2 2.0, these can be identified by the "LE" in ASCII. OS/2[edit] 32-bit Linear Executable Introduced with OS/2 2.0, these can be identified by the "LX" in ASCII. MajorSubsystemVersion The major version number of the subsystem. Pe Header Format Instead, it declares where in its own memory it expects to find a pointer to the value it wishes to import.

asked 7 years ago viewed 11731 times active 10 months ago Blog Stack Overflow Podcast #95 - Shakespearian SQL Server Linked 0 How programmatically create and build an .exe? 0 Difference The first big chunk of information lies in the COFF header, directly after the PE signature. Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. check over here This is in marked contrast to NE files, where each segment contains a list of fixups that need to be applied to the segment.

Table 3. Install.exe - Another popular name for software installers. Login Become a member RSS Part of the TechTarget network Browse Definitionsby Topic Browse Definitionsby Alphabet ResearchLibrary FileExtensions Search Browse Alphabetically A B C D E F G H I J The data where AddressOfNames points to is an array of RVAs, of the size NumberOfNames.

The default is 512. http://en.wikipedia.org/wiki/Mark_Zbikowski share|improve this answer answered Sep 30 '09 at 1:03 kctang 3,01942543 4 Cute and intriguing (I'll definitely be following that link), but not terribly relevant to the question at CIO ( Find Out More About This Site ) balanced scorecard The balanced scorecard is a management system aimed at translating an organization's strategic goals into a set of performance objectives The first level of resource entries identifies the type of the resource: cursors, bitmaps, icons and similar.

In other words, the loader doesn't need to look up function addresses and overwrite the thunk array with the imported function's addresses. LoaderFlags This member is obsolete. Unlike in 16-bit Windows, there's seldom a reason to export anything from an EXE file, so you usually only see .edata sections in DLLs. Figure 11 shows the situation graphically.

Common EXE Filenames Setup.exe - A very common name for software program installers. Most array entries describe an entire section's data. The most common discardable section is the base relocations (.reloc). 0x10000000 This section is shareable. Relative Virtual Addressing (RVA)[edit] In a Windows environment, executable modules can be loaded at any point in memory, and are expected to run without problem.

Mixed 16/32-bit Linear Executable can be identified by the “LE” and is used for Windows 3.x, OS/2, and Windows 9.x. In assembly language, just create a 32-bit segment (which becomes a section) with a name different from the standard sections. In the NE format, the description string is always the first entry of the nonresident names table. They're // really checking for IMAGE_FILE_HEADER.Machine = = i386 (0x14C) // and IMAGE_FILE_HEADER.SizeOfOptionalHeader = = 0; DumpObjFile( (PIMAGE_FILE_HEADER)lpFileBase ); } else printf("unrecognized file format\n"); UnmapViewOfFile(lpFileBase); CloseHandle(hFileMapping); CloseHandle(hFile); } // process all

Exports[edit] Exports are functions and values in one module that have been declared to be shared with other modules.