DefAssembler - Command-line Utility

This package exports a command-line program called defasm, with which you can assemble and (optionally) execute Assembly source code. To use the package, install it globally with npm install -g @defasm/core and then run defasm --help.

Note that the package does not come with an emulator. When executing with -r, the assembled code is saved into an ELF file and then executed directly. As such, the execution utility is currently functional only on systems that support ELF files (e.g. Linux).

Options

• -i, --intel - use Intel syntax when assembling (defaults to AT&T)
• -m32, -m64 - compile for 32- or 64-bit machines, respectively (defaults to whatever the current machine supports, or 64-bit if irrelevant)
• -o FILE, --output FILE - set the path to the output file (defaults to 'a.out' in the current directory, or /tmp/asm.out if --run is provided)
• -x, --executable - generate an executable file from the input file (note that it will not be linked against other files)
• -w, --writable - make the .text section writable
• -r, --run - if given, the assembler will execute the program and print crash information. All parameters following this flag are sent to the program as runtime arguments
• --size-out=FD - set the file descriptor to write the number (in ASCII) of bytes generated by the assembler to