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.
Questions tagged [objdump]
477 questions
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votes
1 answer
Why do common section variables only show up in object file not the executable?
I'm trying to understand more about the "common" section of an executable and I noticed that when doing an objdump on compiled code, I can see variables placed in the common code only on object files (*.o) not on executables.
Why is…
Mike
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5
votes
3 answers
Correlate Source with Assembly Listing of a C++ Program
Analyzing Core Dump in retail build often requires to correlate the objdump of any specific module and the source. Normally correlating the assembly dump with the source becomes a pain if the function is quite involved.
Today I tried to create an…
Abhijit
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4
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gcc/objdump output containing lines from C source code among the lines of disassembled ASM code
I believe this question is significantly different from other, similar questions.
My flow is roughly this:
### Compile
%> gcc -ggdb3 file0.c ... -fno-builtin -c -o file0.o
%> gcc -ggdb3 file1.c ... -fno-builtin -c -o file1.o
...
%> gcc -ggdb3…
Lance E.T. Compte
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Sections of a disassembled x86 elf executable and when and in which order they are run
I'm learning currently x86 assembly and trying some reverse engineering on a regular x86 elf executable. Now there are multiple sections like init main etc.
I did a bit google research but didn't find quit what I wanted. Maybe somebody here knows…
rob
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How to understand .bss section disassemble code?
Source C code:
static int b;
Corresponding .bss section disassemble code in object file:
Disassembly of section .bss:
00000000 :
0: 00 00 add %al,(%eax)
2: 00 00 add %al,(%eax)
Based on the…
Edee
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4
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1 answer
How to get an objdump without NUL bytes?
I have this code in assembly:
global _start
section .rodata
hello: db "Hello World!", 10
section .text
_start:
mov eax,4
mov ebx,1
mov ecx,hello
mov edx,13
int 80h
;…
srccode
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4
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2 answers
Given program counter, find the source line in a shared library
I'm trying to debug a segfault in Android's surfaceflinger daemon on a custom made ARM board. The process crashes before dumping the call stack and register content, including the program counter.
Normally I would've used objdump and searched for…
Einheri
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4
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Understanding disassembled binary from Objdump - What are the fields from the output
I get the following output when I disassembled a simple ARM binary file using the command "arm-linux-gnueabihf-objdump -d a.out"
00008480 <_start>:
8480: f04f 0b00 mov.w fp, #0
8484: f04f 0e00 mov.w lr, #0
8488: bc02 pop…
Dragonight
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objdump with nodejs script that throws segmentation error
I have nodejs script that throws
Error: Process finished with exit code 139 (interrupted by signal 11: SIGSEGV)
After I included
var SegfaultHandler = require('segfault-handler');
SegfaultHandler.registerHandler("crash.log"); // With no…
Tree
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1 answer
node js script crashes: Process finished with exit code 139 (interrupted by signal 11: SIGSEGV)
My script crashes and debugger is unable to catch the error. I even tried to try catch some functions but it didnt work.
Any suggestion how to narrow down where the problem could be?
The script is a testing script for a game. It works good for…
Tree
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4
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1 answer
Link error with LLVM StackMaps from asm/C
I am currently trying to write a basic C stack walker using LLVM's stackmap feature. I have generated the stackmaps and now I am trying to pass the stackmap to a C function so I can work with it.
In particular I am having trouble passing in…
AbelianGrape
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2 answers
How to disable address randomization (ASLR) from an ELF file?
Solved:
The solution was calling personality(0x40000). See details below in the comments.
Where does the ASLR flag resides within an ELF file? I need to disable ASLR for a specific library (.so).
I've tried using objdump but I couldn't find out how…
John
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4
votes
1 answer
Printf Symbol Resolution
I'm writing a little program which trace all the syscall and calls of a binary file (elf) using ptrace (singlestep, getregs, pick_text, opcodes comparison, etc).
So far I've succeed to trace syscalls and simple calls like user defined functions.
But…
Thibaud Auzou
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defining code offset for objdump disassembler in ARMv8
I have a file containing ARM v8 binary code. I want to disassemble the file and get the actual assembly code contained in it.
Assuming the file name is tmp.o I run:
/opt/linaro/A64-tools/bin/aarch64-linux-gnu-objdump -b binary -m AARCH64 -D…
siwesam
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1 answer
Linux ELF file: How to get the shared object belonging to an imported function
Given a dynamically linked ELF binary, say for example /bin/less.
Inside the binary, there is a call to a function provided by a shared library, for example strcpy()
How can I find out from which shared library/shared object the strcp function is…
langlauf.io
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