dwarf | 易学教程

Analizing MIPS binaries: is there a Python library for parsing binary data?

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问题 I'm working on a utility which needs to resolve hex addresses to a symbolic function name and source code line number within a binary. The utility will run on Linux on x86, though the binaries it analyzes will be for a MIPS-based embedded system. The MIPS binaries are in ELF format, using DWARF for the symbolic debugging information. I'm currently planning to fork objdump, passing in a list of hex addresses and parsing the output to get function names and source line numbers. I have compiled

What do I do with DW_OP_call_frame_cfa

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问题 I'm trying to calculate the locations of local variables inside a running program using libdwarf. I used to be able to do this by executing DW_OP_fbreg which would ultimately map to a register that would the frame base for that function. In the newer dwarf standard the frame base is DW_OP_call_frame_cfa. I can't seem to find any information that tells me how to execute DW_OP_call_frame_cfa and come back with a frame base location. There's a lot of references to a CFA table and who restores

Clang link debug_info in executable on OSX

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问题 On OSX when you link a binary from multiple object files like this clang++ -g myfile.cpp -o myfile.o clang++ myfile.o -shared -o myfile.dylib it will generate a .debug_info section (etc.) in myfile.o but in myfile.dylib it just stores a reference to myfile.o and you have to run dsymutil myfile.dylib manually. dsymutil links all the .debug_info sections from the object files together and stores them in a myfile.dylib.dSYM bundle. My question is: is there a way to make Clang actually link the

Trying to compile libdwarf, gives undefined errors

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问题 I'm trying to build the libdwarf api under windows but I'm receiving the following compile errors. in dwarf_elf_access.c undefined type Elf32_Ehdr, undefined symbol EI_CLASS undefined symbol ELFCLASS64 undefined symbol ELFDATA2LSB ... I did a search through all the header files and source files and I couldn't find them defined anywhere as far as I could tell. Are these unix/linux specific definitions? If it is how should these errors be resolved under windows? Thanks 回答1: It seems you need to

How to find DWARF_DSYM_FOLDER_PATH and DWARF_DSYM_FILE_NAME in xcode 9.3

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问题 I am using the Crashlytics in order to report the crash occurs in the iOS app. Here, I want to know how to find the path of these below dwarf folder and file in xcode: DWARF_DSYM_FOLDER_PATH DWARF_DSYM_FILE_NAME 回答1: You need to go to Organizer and select your archive file, select show in finder after that you need to select show package content and finally there is your DYSM folder 回答2: You can do it using xcodebuild tool: xcodebuild -project MyProject.xcodeproj -target MyTarget

Dwarf hello world assembly example or tutoral?

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问题 I'm writing an assembly level human speakable programming language in nasm. I've noticed that Dwarf debugging is an essential component to developing it. In order for it to become self-hosting later on, will not only have to compile to ELF, but also support Dwarf to make debugging viable. For ELF there is a wonderful nasm example of how to make an ELF header http://www.muppetlabs.com/~breadbox/software/tiny/teensy.html http://blog.markloiseau.com/2012/05/tiny-64-bit-elf-executables/ I'm

how to decode .dSYM file to explicit DWARF format?

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问题 DWARF is a debugging information format. The .dSYM file generated by Xcode contain the DWARF debugging information. The Question is : how to decode the .dSYM file to get the human-readable DWARF information, which should like below. 回答1: On Mac OS X, you use the dwarfdump utility to dump the DWARF in .o files or in .dSYM bundles. % dwarfdump fig7.o ---------------------------------------------------------------------- File: fig7.o (x86_64) -----------------------------------------------------

Dwarf Error: wrong version in compilation unit header (is 4, should be 2)

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A shared object was built on RedHat Linux and while all the code was compiled with debug, the debugger (gdb) refused to load the symbols and issued an error as in: ... GNU gdb Fedora (6.8-37.el5) ... This GDB was configured as "x86_64-redhat-linux-gnu"... Dwarf Error: wrong version in compilation unit header (is 4, should be 2) [in module libgrokf.so] With this error, I could not get break points to trigger in any function nor see proper stack trace. I recompiled the entire project but nothing helped. I do know that some time in the past there was no problem in debugging that module. What is

Dwarf hello world assembly example or tutoral?

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I'm writing an assembly level human speakable programming language in nasm. I've noticed that Dwarf debugging is an essential component to developing it. In order for it to become self-hosting later on, will not only have to compile to ELF, but also support Dwarf to make debugging viable. For ELF there is a wonderful nasm example of how to make an ELF header http://www.muppetlabs.com/~breadbox/software/tiny/teensy.html http://blog.markloiseau.com/2012/05/tiny-64-bit-elf-executables/ I'm wondering if there is or even could be made something similar for DWARF, an example hello world, that

how to decode .dSYM file to explicit DWARF format?

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DWARF is a debugging information format. The .dSYM file generated by Xcode contain the DWARF debugging information. The Question is : how to decode the .dSYM file to get the human-readable DWARF information, which should like below. On Mac OS X, you use the dwarfdump utility to dump the DWARF in .o files or in .dSYM bundles. % dwarfdump fig7.o ---------------------------------------------------------------------- File: fig7.o (x86_64) ---------------------------------------------------------------------- .debug_info contents: 0x00000000: Compile Unit: length = 0x00000077 version = 0x0002 abbr