Questions tagged [mach-o]
Executable file format utilized by Darwin.
mach-o
368
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LLDB can't list function nor set a breakpoint
I'm having some trouble using lldb, I want to set a breakpoint for a macho file at the start label and at a function called Function1. Ideally i'd like to list all the functions like in gdb with the '...
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Using llvm-objcopy to remove symbols from static library (mach-o)
I am trying to use llvm-objcopy (or llvm-strip) to remove a symbol from a static library (mach-o). I am doing the following:
$ llvm-objcopy --strip-symbol "...
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Error trying to run a FAT binary on iOS device: incompatible architecture message while correct architecture is included
I've been trying to Google similar issues, but it seems I'm the only one so far, to my surprise ...
I am trying to build Tesseract for iOS. There's various build scripts online that I've tried, but ...
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Why is data loaded bigger than expected using ADRP, ADD, and LDR instructions?
I am learning assembly for Apple M1 arm64 and noticed something odd on trying to load a data from a label on the data segment. It seems to be loading the content not just of the label I asked for ...
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How does "arch -arch" work to enable Rosetta and force binary architecture?
When using Rosetta on macOS running on an ARM processor, the arch command can be used to force a wrapped command to execute as a specific architecture. In other words, arch -arch x86_64 mycommand will ...
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Decompiling ARM64 and understanding branch targets bounderies
When decompiling code from arm64, how can one know if an unconditional branch instruction b is a branch to a label in the same function and not to some other function?
How do state of the art ...
- 1,941
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A “universal” binary?
Is there a way to combine ELF, Mach-O and PE compiled code in the general case, so there could be one “binary” file for all modern systems? (Windows, macOS, Linux)
I remember there are stories of old ...
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Mach-O file structure
I used Xcode 14.3.1 and iOS version 16.2.I wanted to understand the process of Mach-O binding symbols, but the offset address of the NSLog function is very different from others:
other's:
I looked ...
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Mach-O Could Not Be Built
Everytime i try to code something this happens
Proof:Mach-O file couldn’t be generated.
I tried to make the best car hud but that happened.
My expectations:I expected it to start.
I really don’t like ...
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Modifying the mach-o executable file .text section to be writable caused a crash
;)
What I want to ask is why modifying the .text section in the mach-o executable file (ARM64) will cause runtime crashes?
I use some executable file editor (eg: MachOView) to do this。
before ...
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Interposing or wrapping syscall made from a linked framework
I have a executable, which links to one system framework on Mac. The system framework makes some system calls. I'm interested in socket and connect calls, to redirect the socket connection to some ...
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How does Mach-O store pointers to Objective-C Metadata entities?
A somewhat lengthy question so please bear with me.
I am writing a parser to extract Objective-C metadata entities from input Mach-O binaries. And I want to better understand how pointers to metadata ...
- 677
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difference between __got section and __nl_symbol_ptr section
Both of them are labeled as S_NON_LAZY_SYMBOL_POINTERS and are bound at load time. However, I only see the __DATA__CONST.__got section in most Mach-O files.
What's the difference between them and why ...
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Why is partial linking making all symbols non-global?
I'm trying to reduce the disk size of a big static library libIn.a that contains a lot (~3000) of small object files (.o), by combining all the object files into a single .o file; as far as I ...
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Call shared function from assembly ARM mac
This code works but isn't what I want. I'd like to build from linux which will complain it can't find _write. On my mac I can compile this just fine. Notice the bl _write after the svc. Without it the ...
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