What is * und * In objdump?
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What is * und * In objdump?
Next is the section with which the symbol is associated or *ABS* if the section is absolute (ie not connected with any section), or *UND* if the section is referenced in the file being dumped, but not defined there.
What does objdump mean in Linux?
objdump is a command-line program for displaying various information about object files on Unix-like operating systems. For instance, it can be used as a disassembler to view an executable in assembly form. It is part of the GNU Binutils for fine-grained control over executables and other binary data.
What is objdump output?
objdump displays information about one or more object files. The options control what particular information to display. This information is mostly useful to programmers who are working on the compilation tools, as opposed to programmers who just want their program to compile and work.
How use objdump command in Linux?
Working with objdump command
- To get the File headers of an Object File.
- To print the object-specific file header content.
- To print the section header content of the file.
- To print the all header content of the file.
- To print the assembler content of the sections capable of execution.
What is objdump C?
Objdump displays information about one or more object files, either on their own, or inside libraries. It is commonly used as a disassembler, but it can also display information about file headers, symbol tables, relocations, debugging directives and more.
What is an ELF image?
ELF files are Executable Linkable Format which consists of a symbol look-ups and relocatable table, that is, it can be loaded at any memory address by the kernel and automatically, all symbols used, are adjusted to the offset from that memory address where it was loaded into.
What is objdump in GCC?
What is readelf in Linux?
readelf displays information about one or more ELF format object files. The options control what particular information to display. elffile… are the object files to be examined. 32-bit and 64-bit ELF files are supported, as are archives containing ELF files.
How do I decode an ELF file?
you can use readelf and objdump to read parts of an elf file. You can also use ‘hexdump filename’ to get a hexdump of the contents of a binary file (this is likely only useful if you like reading machine code or you are writing an assembler).
What does Addl mean assembly?
addl %ecx , (%eax) For me it means – storing the result of addition of values stored in %ecx and in memory address (%eax), in a memory address (%eax) .
What is DB in assembly?
DB = define byte size variables. DW = define word size (16 bits) variables. DD = define double word size (32 bits) variables.
