OllyDbg is a 32-bit assembler
level analysing debugger for Microsoft
Windows. Emphasis on binary code analysis makes
it particularly useful in cases where source is unavailable. OllyDbg is
a shareware, but you can download and use
it
for
free. Special highlights are:
Intuitive user interface, no cryptical
commands
Code analysis - traces registers,
recognizes procedures,
loops, API calls, switches, tables, constants and strings
Directly loads and debugs DLLs
Object file scanning - locates
routines
from object
files and libraries
Allows for user-defined labels,
comments
and function
descriptions
Understands debugging information in
Borland
format
Saves patches between sessions, writes
them back to executable file and updates
fixups
Open architecture - many
third-party
plugins are available
No installation - no trash in registry
or
system
directories
Debugs multithread applications
Attaches to running programs
Configurable disassembler, supports both MASM and IDEAL formats
MMX, 3DNow! and SSE data types and instructions, including Athlon
extensions
Full UNICODE support
Dynamically recognizes ASCII and UNICODE strings - also in Delphi
format!
Recognizes complex code constructs, like call to jump to procedure
Decodes calls to more than 1900 standard API and 400 C functions
Gives context-sensitive help on API functions from external help
file
Sets conditional, logging, memory and hardware breakpoints
Traces program execution, logs arguments of known functions
Shows fixups
Dynamically traces stack frames
Searches for imprecise commands and masked binary sequences
Searches whole allocated memory
Finds references to constant or address range
Examines and modifies memory, sets breakpoints and pauses program
on-the-fly
OllyDbg is a 32-bit assembler level analysing debugger for Microsoft Windows. Emphasis on binary code analysis makes it particularly useful in cases where source is unavailable.
