Explain the capabilities of the Ollgdbg and its interfaces. What is rebasing?

Expert Solution

Capabilities of OllyDbg:

OllyDbg is an x86 debugger that emphasizes binary code analysis, which is useful when source code is not available.

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
Assembles commands into the shortest binary form
Starts from the floppy disk

Interface:

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

Rebasing:

Rebasing is the process of creating a shared library image in such a way that it is guaranteed to use virtual memory without conflicting with any other shared libraries loadable in the system.

venereology answered 11 months ago

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