Stack Overflow
Stack Overflow

Questions tagged [objdump]

objdump is a program for displaying various information about object files. For instance, it can be used as a disassembler to view executable in assembly form. It is part of the GNU Binutils for fine-grained control over executable and other binary data.

477 questions
1
vote
2 answers

How to separate ARM instructions and data during dis-assembly

I am writing/(using binutils) a piece code to do an manual dis-assembly of thumb2(16bit and 32 bit) instructions. I am facing a problem to differentiate between genuine ARM instructions and DATA portions. The biggest problem is instructions are not…
user1468106
  • 33
  • 1
  • 3
1
vote
1 answer

how to extract the data type of global variables in objdump output file?

I have a binary file that I disassemble using objdump disassembler tool. I want to know how can I can extract the data type of the global variables that are exist in the objdump output file?
hamb
  • 159
  • 1
  • 2
  • 11
1
vote
1 answer

retrieving variable type from debug info

Consider : int x[] = {1, 2, 3}; int main(){ return 0; } If we do an objdump of the data section, we will get the variable x with the starting address and the size as (4*3) bytes. Is there any easy way to retrieve the information that x was an…
pankaj
  • 335
  • 4
  • 15
0
votes
2 answers

objdump for old ARM7TDMI (ARMv4T) showing instructions for newer architectures?

I care about the success of GNU very much and wanted some feedback on what to do about a potential bug in objdump for ARM.... I'm examining the output of "objdump -D --target=binary -m arm7tdmi" and seeing instructions that do not exist on the…
None
0
votes
1 answer

Extracting _fini in C binary

I am basically looking for a way to extract _fini address within a binary. Naive way I can think of is to use objdump and parse for _fini. Is there a better way to do this (e.g. not using objdump). Thank you!
Student01
  • 109
  • 3
  • 11
0
votes
1 answer

File format not recognized when run objdump in binutils

There is a .a lib in iOS project. I want to see the methods name in it, so I installed binutils on Mac. But when I run objdump [-h] xxx.a. It says: "File format not recognized". So, what format does objdump supports? And how can I see the methods in…
EVA
  • 375
  • 1
  • 6
  • 18
0
votes
0 answers

If objdump doesn't show the definitive virtual addresses then how can I get the real definitive virtual addresses in a program?

I'm on an Ubuntu ( 22.04.3 ) x86_64 system. I have this little C program in a file named test.c : void fx1(){ int b = 20; b++; } int main(){ int a = 10; a++; fx1(); } I've compiled this program with "gcc test.c -o test" and…
alessio solari
  • 313
  • 1
  • 6
0
votes
0 answers

Understanding objdump DWARF information regarding struct and its member variables

I think I have the correct understanding of my question, but as I'm going purely with documentation and intuition, I was hoping someone with more expertise than me could verify or correct my understanding. The closest question I was able to find in…
Jay
  • 373
  • 1
  • 10
0
votes
1 answer

Why does GCC not putting functions at the begining of the text section in a shared library?

I have a C source file temp1.c void foo(void){} On my AMD64 Archlinux environment I compile this with command gcc -o test1.so -shared test1.c, and generates a shared library test1.so. I then dump the text section of test1.so using command objdump…
gnaggnoyil
  • 764
  • 5
  • 14
0
votes
0 answers

How to make riscv-objdump use pc-relative address rather than absolute address? And what are alias-instructions? Has a standard manual?

I'm learning RISCV(64) and implementing a simulator. I compile the following simple code and disassemble the generated elf with riscv64-unknown-linux-gnu-objdump. I have two problems totally. int main() { return 0; } If I use…
beyond
  • 11
  • 2
0
votes
0 answers

objdump -C interfering with --disassemble=

Here is a simple cpp file: #include void test(int x) { std::cout << "x is " << x << std::endl; } int main() { test(5); return 0; } After compiling with g++, suppose I want to use objdump to show the disassembly only of the test…
charlescochran
  • 107
  • 7
0
votes
0 answers

How to use objdump with --disassemble=

Here is a simple cpp file: #include void test(int x) { std::cout << "x is " << x << std::endl; } int main() { test(5); return 0; } After compiling with g++, suppose I want to use objdump to show the disassembly only of the test…
charlescochran
  • 107
  • 7
0
votes
0 answers

How to make objdump show jumps in diff-friendly way

I'm struggling with understanding the jumps shown by objdump, taking into consideration that it should be diff-friendly. Use --visualize-jumps This is pretty nice and clear for the jumps. However, it works well only when looking at a single listing.…
Adam Badura
  • 5,069
  • 1
  • 35
  • 70
0
votes
0 answers

Callgrind and objdump don't point to the same address on ARMv7

When I run Callgrind on a simple program on an ARMv7 system, I get the following dump (extract): ob=(6) /lib/arm-linux-gnueabihf/libm-2.31.so fl=(68) ./csu/../sysdeps/arm/crti.S fn=(280) 0x00007570 0x7570 64 1 0x7574 65 1 0x7578 67 1 0x757c 68…
Benjamin Barrois
  • 2,566
  • 13
  • 30
0
votes
1 answer

Using objdump on ARM architecture: Disassembling to INTEL arch

I have an object file and am trying to disassemble it. When I use: objdump -d example.o I get an assembly in code in the file format of elf64-littleaarch64. I am trying to disassemble this into INTEL elf64-x86-64, how do I go about doing this?
Helix
  • 9
  • 1
1 2 3
…
31 32