mach-o

问题 My C++ compiler creates "dylib" files which contain dynamic libraries. Whats the difference between .dylib and .so files? And what is the difference between files in Mach-O format and files in an ELF format? I have to build files for later use under iOS (static libraries only/Mach-O) and Android (ELF). Thanx! 回答1: I found that: One Mach-O feature that hits many people by surprise is the strict distinction between shared libraries and dynamically loadable modules. On ELF systems both are the

问题 This question already has an answer here : Mach-O 64-bit format does not support 32-bit absolute addresses. NASM Accessing Array (1 answer) Closed last year . %include "along64.inc" default rel section .data EnterMsg : db "Enter a number to add to the list; enter 0 when you done" ,0ah,0 ExitMsg : db "The sorted list: " ,0ah,0 InputError1 : db "Input Error; Integers Only" ,0ah,0 InputError2 : db "Input Error; Maximum list is 100" ,0ah,0 InputError3 : db "Input Error; Enter AT LEAST ONE Int"

问题 I need to change to reference of a function in a mach-o binary to a custom function defined in my own dylib. The process I am now following is, Replacing references to older functions to the new one. e.g _fopen to _mopen using sed. I open the mach-o binary in MachOView to find the address of the entities I want to change. I then manually change the information in the binary using a hex editor. Is there a way I can automate this process i.e write a program to read the symbols, and dynamic

问题 I have a PID and I want to find out if the process is running in 32bit or in 64bit Intel mode. How? 回答1: I can do via NSRunningApplication. [[NSRunningApplication runningApplicationWithProcessIdentifier:pid] executableArchitecture] returns the Mach-O architecture constant. This works only for GUI applications, though... 来源： https://stackoverflow.com/questions/7335245/macosx-find-out-if-a-process-given-a-pid-is-running-in-32bit-or-in-64bit-inte

问题 So I'm learning x86_64 nasm assembly on my mac for fun. After hello world and some basic arithmetic, I tried copying a slightly more advanced hello world program from this site and modifying it for 64 bit intel, but I can't get rid of this one error message: hello.s:53: error: Mach-O 64-bit format does not support 32-bit absolute addresses . Here is the command I use to assemble and link: nasm -f macho64 hello.s && ld -macosx_version_min 10.6 hello.o . And here is the relevant line: cmp rsi,

问题 UPDATE : Answer below in question, thanks to Greg Parker's pointer… I uploaded a sample project here, but I'll describe it as well: https://github.com/tewha/getsectbyname-crash I get a crash from my my (64-bit only) executable, but not when run from Xcode . If I run it from Terminal or Instruments , however, it crashes. This is not a Debug vs. Release configuration problem; running the Debug executable in Terminal also crashes. Running the Release executable from Xcode works. I am trying to

问题 I'm looking to patch a piece of abandonware with some code. The software is carbon based, so I can not use an InputManager (at least, I do not think I can). My idea was to add a dylib reference to the mach-o header, and launch a new thread when the initialization routine is called. I have mucked around with the mach-o header using a hexeditor to add the appropriate load command (LC_ LOAD_DYLIB). otool reports what I expect to see, so I'm fairly confident that the file is correctly formatted.

问题 When using Clang's or GCC's Darwin backends to create executables for OSX, the flag -mmacosx-version-min=version can be used to set the earliest version of OSX the executable will run on. Is there any way to trace back from a given executable which flag was used to compile it? I.e. is there a way to determine which minimum OSX version is targeted by a given executable? 回答1: Use otool -l /path/to/binary and inspect the LC_VERSION_MIN_MACOSX load command; specifically, the version field. For

问题 How can I create a HelloWorld iPhone mach-o file? I want to test it on my jailbreak iPhone. Help me please!!! 回答1: I found this when I googled around on the web for you. http://mobiforge.com/developing/story/getting-started-with-iphone-development It talks about how to create your first "Hello World" application. 回答2: Here's the documentation for the Mach-O format from Apple: http://developer.apple.com/library/mac/#documentation/DeveloperTools/Conceptual/MachORuntime/Reference/reference.html

问题 I have a program that is Mach-O executable i386 and I was hoping to run it on a linux server. Is this possible?? If so, how? I can't see, to figure this out. Thanks! 回答1: There is currently no working Mach-O loader for Linux. 来源： https://stackoverflow.com/questions/3205986/can-i-run-a-binary-file-that-is-mach-o-executable-i386-on-linux