fdbg for AMD64 is assembler level debugger for user-mode (ring3) binary applications, running in long mode (64-bit) - Windows and Linux versions. Version for UEFI x64 is also available.
Supported platforms:
Windows XP x64, Windows 2003 server x64, Vista x64, Windows 2008 server x64, Windows 7 x64
Linux x64
UEFI x64
Windows Version is GUI based.
Linux version is command line based (console) and doesn't need any library to run so it doesn't matter what Linux distribution you use.
UEFI version is command line based.
fdbg project was started to help in debugging programs written in assembler to everybody who feels the power of assembler
it is written in Flat Assembler and source files are included
its syntax is similar to FASM
it supports debug symbols and you can find some tricks in included help how to debug without symbols
it is suitable for everybody who tries to create his/her first program written in assembler
it has some features and power for experienced users too
it is very small
newest version for Windows x64 (supports windows server 2012 / windows 8) uploaded 2012 October 01, previous version (crashes on windows server 2012 / windows 8) uploaded 2011 January 11
UEFI x64 version and UEFI x64 version VM for Windows, uploaded 2012 September 19
info about hypervisor-based ring3 debugger for windows x64 (last update 2011 Feb 07)
Linux x86_64 version uploaded 2010 April 12
fdbg0024
[+] AVX support:
developpers: Alphonso, tthsqe (windows AVX APIs), tthsqe (disasm engine for AVX instructions - download it from FASM Forum, section Project and Ideas, thread FDBG)
too bad news: disasm which was coded by me doesn't support disassembling AVX instructions and it seems I won't have a time to implement it
[-] fixed bug which begun in version 000B (2006-sep-28) and was silent since windows server 2012 / windows 8 where the bug appeared (see !_sanation_of_6_years_old_bug.txt)
FDBG download:
http://fdbg.x86asm.net/download.html
newest version for Windows x64 (supports windows server 2012 / windows 8) uploaded 2012 October 01, previous version (crashes on windows server 2012 / windows 8) uploaded 2011 January 11