OBJ2ASM: Object File Disassembler

• Understanding how various language constructs are compiled.
• Trying various ways of expressing an algorithm to see which ones produce faster code.
• If a particular function needs to be rewritten in inline assembly and hand optimized for maximum speed, the OBJ2ASM output forms a good starting point.
• Due to the large number of function calling conventions supported, sometimes it is necessary to verify that the correct convention is being used.
• Verifying correct code generation.
• Comparing output with other compilers.
• Learning assembly language.

Compiling the file with the -gl option embeds line number information in the object file, enabling OBJ2ASM to match the source code up with the generated assembler instructions. Compiling the file with the -g option embeds debug records in the object file, which OBJ2ASM will format and output.

OBJ2ASM commands have the following format:

	obj2asm [-l -o -x] objectfile[.obj] [sourcefile] [-coutfile[.cod]]

objectfile is the object file to disassemble.

The extension defaults to .obj.

sourcefile is the file compiled to produce the object file.

Use this if the source file name embedded in the object file is missing or incorrect.

-l Omit code labels in the assembly language file it generates.

Useful when comparing two object files; helping highlight the differences between them.

-o Emit object code for each assembly language instruction.

-x Emit code segment offset for each instruction.

-coutfile Writes output to outfile instead of the standard output.

The default extension for outfile is .cod.

To see the code generated by compiling test.cpp, use the following commands:

	dmc -c -gl test
	obj2asm test