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Computer register for debugging
On the x86 architecture, a debug register is a register used by a processor for program debugging. There are six debug registers, named DR0...DR7, with
X86_debug_register
List of x86 microprocessor instructions
80386 also introduced the two new segment registers FS and GS as well as the x86 control, debug and test registers. The new instructions introduced in the
List_of_x86_instructions
Computer assembly language instruction
however it is unavailable in x86-64 mode. The INT1 instruction is a one-byte-instruction defined for as a hardware debug trap. The opcode for INT1 is
INT_(x86_instruction)
Family of instruction set architectures
x86 (also known as 80x86 or the 8086 family) is a family of complex instruction set computer (CISC) instruction set architectures initially developed
X86
Debugging method used in software development
breakpoints). As an example, the x86 instruction set architecture provides hardware support for breakpoints with its x86 debug registers. Such hardware may include
Breakpoint
Line-oriented debug utility in DOS
line-oriented debugger DEBUG.EXE is an external command in MS-DOS and compatible operating systems, OS/2, and 16 and 32-bit versions of Windows. DEBUG can act
Debug_(command)
Family of backward-compatible assembly languages
x86 assembly language is a family of low-level programming languages that are used to produce object code for the x86 class of processors. Previous evolutions
X86_assembly_language
Working storage in a computer processor
8 debug registers (two reserved), 1 stack pointer register, 1 stack base register, 1 instruction pointer, 1 flags register, and 6 segment registers. Processors
Register_file
Control registers in some x86 processors
A model-specific register (MSR) is any of various control registers in the x86 system architecture used for debugging, program execution tracing, performance
Model-specific_register
Means of compromising computer security by restarting the computer
system so that CPU registers (in TRESOR's case the x86 debug registers and in Loop-Amnesia's case the AMD64 or EMT64 profiling registers) can be used to
Cold_boot_attack
Serial interface for testing integrated circuits
Multiple silicon architectures, such as PowerPC, MIPS, ARM, and x86, built an entire software debug, instruction tracing, and data tracing infrastructure around
JTAG
Topics referred to by the same term
black-and-white process DR-5, a highway in the Dominican Republic DR5 register, a debug register in x86 processors This disambiguation page lists articles associated
DR5
Instructions directly executable by a computer
interface to a CPU and varies by groupings or families of CPU design such as x86 and ARM. Generally, machine code compatible with one family is not with others
Machine_code
Software debugger
for their own FpDebug engine. The LLDB debugger is known to work on macOS, Linux, FreeBSD, NetBSD and Windows, and supports i386, x86-64, and ARM instruction
LLDB_(debugger)
Family of RISC-based computer architectures
Debug Access Port (DAP) is an implementation of an ARM Debug Interface. There are two different supported implementations, the Serial Wire JTAG Debug
ARM_architecture_family
Processor register which changes or controls the general behavior of a CPU
instructions. General-purpose register Test register Model-specific register Debug register Flag byte Status register IBM never shipped the 360/64 or
Control_register
Full-screen debugger for DOS by Microsoft
from DEBUG. Codeview in turn was described as "a fullscreen SYMDEB". Borland Turbo Debugger SoftICE x86 memory models Microsoft Visual Studio Debugger Program
CodeView
Open-source CPU instruction set architecture
instruction set computer (RISC) principles. Unlike proprietary ISAs such as x86 and ARM, RISC-V is described as "free and open" because its specifications
RISC-V
Structure on x86-based computers that holds information about a task
stored in the TSS: Processor register state I/O port permissions Inner-privilege level stack pointers Previous TSS link Debug state Shadow stack pointer
Task_state_segment
General-purpose programming language
the default for most targets, except for SPIR-V, and x86-64 (although this is currently just in Debug mode). Zig also supports their self-hosted backend
Zig_(programming_language)
variants of Cyrix III did not support the TRx test registers. Control register x86 debug register Intel, Pentium® Processor Family Developer’s Manual
Test_register
Instruction for x86 microprocessors
In the x86 architecture, the CPUID instruction (identified by a CPUID opcode) is a processor supplementary instruction (its name derived from "CPU Identification")
CPUID
Computer program to translate machine language into assembly language
changes to registers, data, or other state elements (such as condition codes) caused by each instructions. This provides powerful debugging information
Disassembler
Linux kernel patch protecting against cold boot attacks
keys in the x86 debug registers, and uses on-the-fly round key generation, atomicity, and blocking of usual ptrace access to the debug registers for security
TRESOR
Low-level programming language family
the x86/IA-32 CPUs, the Intel assembly language syntax MOV AL, AH represents an instruction that moves the contents of register AH into register AL. The
Assembly_language
Chen (May 18, 2026). "Just shows that nobody cares about debugging the parity flag any more". x86 architecture x86 assembly language x86 Flags Register
Parity_flag
Microcode in x86 Intel processors
by Intel to implement the x86 instruction set architecture and govern other behavior of x86 CPUs. On early generations of x86 CPUs, most CPU instructions
Intel_microcode
32-bit microprocessor by Intel
operating systems that used virtual memory. It also offered support for register debugging. The 386 featured three operating modes: real mode, virtual mode,
I386
Intel microprocessor
first CPU using the Pentium brand. Considered the fifth generation in the x86 (8086) compatible line of processors, succeeding the i486, its implementation
Pentium_(original)
Exception on x86 that causes a reboot
On the x86 computer architecture, a triple fault is a special kind of exception generated by the CPU when an exception occurs while the CPU is trying
Triple_fault
Interface to software defined in terms of in-process, machine code access
software interpreter Comparison of application virtualization software Debug symbol – Type of identifier in computer science Foreign function interface –
Application_binary_interface
Numeric value with an unclear meaning
for the string Hah!IdontNeedEFI partially in little endian order. Magic debug values are specific values written to memory during allocation or deallocation
Magic_number_(programming)
Free virtualization and emulation software
one processor architecture on any other. QEMU supports the emulation of x86, ARM, PowerPC, RISC-V, and many others. QEMU is free software originally
QEMU
Method of CPU communication
preferred in IA-32 and x86-64 based architectures because the instructions that perform port-based I/O are limited to one register: EAX, AX, and AL. The
Memory-mapped I/O and port-mapped I/O
Memory-mapped_I/O_and_port-mapped_I/O
Old Unix executable file format
of the BSD a.out format compared to that of Linux. The a.out support for debug information is done through the use of special entries in the symbol table
A.out
Source-level debugger
The GNU Debugger (GDB) is a portable debugger that runs on many Unix-like systems and works for many programming languages, including Ada, Assembly, C
GNU_Debugger
Data structure in microprocessors
The interrupt descriptor table (IDT) is a data structure used by the x86 architecture to implement an interrupt vector table. The IDT is used by the processor
Interrupt_descriptor_table
Portable emulator and PC debugger
portal Bochs (pronounced "box") is a portable IA-32 and x86-64 IBM PC compatible emulator and debugger mostly written in C++ and distributed as free software
Bochs
While the machine state register found in the PowerPC architecture and the model-specific registers found in IA-32 and x86-64 architectures fulfill similar
Machine_state_register
American computer company, 1982–2010
then later their own RISC-based SPARC processor architecture, as well as on x86-based AMD Opteron and Intel Xeon processors. Sun also developed its own storage
Sun_Microsystems
Linux distribution based on Red Hat Enterprise Linux
from RHEL version 2.1AS. Since version 8, CentOS officially supports the x86-64, ARM64, and POWER8 architectures, and releases up to version 6 also supported
CentOS
Unix operating system originally developed by Sun Microsystems
Solaris is a proprietary Unix operating system offered by Oracle for SPARC and x86-64 based workstations and servers. Originally developed by Sun Microsystems
Oracle_Solaris
Topics referred to by the same term
a protein DR-3, a highway in the Dominican Republic DR3 register, a debug register of x86 processors DR3 (car), an Italian automobile by DR Motor Company
DR3_(disambiguation)
Computer system with a dedicated function
inspected in the debugging process (such as, only memory, or memory and registers, etc.). From simplest to most sophisticated, debugging techniques and
Embedded_system
Family of 64-bit Intel microprocessors
engineers said "we could run circles around PowerPC...we could kill the x86". Early predictions were that IA-64 would expand to the lower-end servers
Itanium
Model that describes the programmable interface of a computer processor
enjoy low register pressure. CISC ISAs like x86-64 offer low register pressure despite having smaller register sets. This is due to the many addressing modes
Instruction_set_architecture
Debug software
Yuschuk) is an x86 debugger that emphasizes binary code analysis, which is useful when source code is not available. It traces registers, recognizes procedures
OllyDbg
instructions in System/360, the PDP-11 architecture, the VAX architecture, and the x86 architecture are variable-length. Initial versions of SuperH had fixed-length
Comparison of instruction set architectures
Comparison_of_instruction_set_architectures
Type of computer fault
1) $2 = 1 The GDB debugger shows that the immediate value 0x2a is being stored at the location stored in the EAX register, using X86 assembly language
Bus_error
Assembler and debugger for MS-DOS
distributed as shareware, but were provided to users who registered A86. While supporting expected x86 syntax, A86 and A386 do not require directives, such
A86_(software)
Operating mode of x86 central processor units
called ring −2 in reference to protection rings) is an operating mode of x86 central processor units (CPUs) in which all normal execution, including the
System_Management_Mode
Novelty form of variant English spelling
computer processors, operating systems, and debuggers make use of magic numbers, especially as a magic debug value. Many computer languages require that
Hexspeak
Technical specification for firmware architecture
official documentation for the following processor architectures: x86 (IA-32, x86-64) Itanium (IA-64) ARM (AArch32, AArch64) RISC-V (32-bit, 64-bit,
UEFI
Computer operating system
on DEC Alpha systems, the Itanium-based HPE Integrity Servers, and select x86-64 hardware and hypervisors. Since 2014, OpenVMS is developed and supported
OpenVMS
Compiler
and Data Parallel C++ (DPC++) source, targeting Intel IA-32, Intel 64 (aka x86-64), Core, Xeon, and Xeon Scalable processors, as well as GPUs including
Intel_C++_Compiler
Programming language close to hardware
following is the same algorithm written in x86-64 assembly language using Intel syntax. The registers of the x86-64 processor are named and manipulated directly
Low-level programming language
Low-level_programming_language
Toolkit for building GUI and command-line based operating systems
for instance, you can run this command after build: qemu-system-x86_64 -cdrom ./bin/Debug/net6.0/MyCOSMOSProject.iso To compile .NET CIL into assembly language
Cosmos_(operating_system)
Subsystem for 64-bit Windows for running 32-bit Windows programs
thunks) A dll that allows 32-bit x86 instructions to be executed, which varies by instruction set architecture. On x86-64, Wow64cpu.dll takes care of switching
WoW64
Type of data transfer
2016. "PAM4 Signaling in High-Speed Serial Technology: Test, Analysis, and Debug" (PDF) (application note). Tektronix. Pan, Zhongqi; Yue, Yang (3 December
Serial_communication
Topics referred to by the same term
video game DR-2, a highway in the Dominican Republic DR2 register, a debug register of x86 processors DR2 (car), an Italian automobile by DR Motor Company
DR2_(disambiguation)
16-bit microprocessor
became known as the x86 family. In addition, the PCI Vendor ID for system devices produced by Intel is 8086. All internal registers, as well as internal
Intel_8086
C-like programming language
developed by The Quick C-- Team. It compiles version 2 of C-- code to Intel x86 Linux machine code. Compilation to machine code for other platforms is available
C--
Integrated development environment by Microsoft
as code refactoring. The integrated debugger works as both a source-level debugger and as a machine-level debugger. Other built-in tools include a code
Visual_Studio
Open-source computer firmware
feature of coreboot is that the x86 version runs in 32-bit mode after executing only ten instructions (almost all other x86 BIOSes run exclusively in 16-bit
Coreboot
Computer programming language
relatively simple debugging facilities of the IDE were insufficient, Turbopower Software produced a more powerful debugger, T-Debug. The same company
Turbo_Pascal
Code intended as a payload to exploit a software vulnerability
Shellcoding (PDF) An overview of x86 shellcoding by Angelo Rosiello An introduction to shellcode development Contains x86 and non-x86 shellcode samples and an
Shellcode
Software framework
Linux, and Windows operating systems running on the AArch32, IA-32, and x86-64 instruction set architectures. DynamoRIO was originally created as a dynamic
DynamoRIO
Data structure in Microsoft Windows programming
(TIB) or Thread Environment Block (TEB) is a data structure in Win32 on x86 that stores information about the currently running thread. It descended
Win32 Thread Information Block
Win32_Thread_Information_Block
Free compiler and IDE for Pascal and ObjectPascal
improved DWARF (2/3) debug format support, and optimizations such as tail recursion, omission of unneeded stack frames and register-based common subexpression
Free_Pascal
Compiler backend for multiple programming languages
project encompasses the LLVM intermediate representation (IR), the LLVM debugger, the LLVM implementation of the C++ Standard Library (with full support
LLVM
American technology company
last release, version 15.10, on October 28, 2015. In 1996, PGI developed x86 compilers for the ASCI Red Supercomputer at Sandia National Laboratories
The_Portland_Group
Layer of hardware-level instructions or data structures
addressing and complex operations (see below) made them difficult to design and debug; highly encoded and varied-length instructions can contribute to this as
Microcode
In programming, detecting whether a variable is within given bounds before use
part of the STL and is enabled with a compiler switch (_GLIBCXX_DEBUG=1 or _LIBCPP_DEBUG=1). C# also supports unsafe regions: sections of code that (among
Bounds_checking
microprocessor families (e.g. 680x0, x86) provide the capability to trace instructions to aid in program development. A debugger might use this capability to
Trace_vector_decoder
Software testing tool
such as running x86 simulators on x86 hosts, or ARM simulators on ARM hosts. An ISS is often provided with (or is itself) a debugger in order for a software
Instruction_set_simulator
Windows NT kernel image
definition of this structure can be retrieved by using the kernel debugger. In the x86 architecture, the kernel receives the system already in protected
Ntoskrnl.exe
Technique that abstracts logical registers from physical registers
words will use more registers when possible. For example, the IA-32 instruction set architecture has 8 general purpose registers, x86-64 has 16, many RISCs
Register_renaming
Hardware interrupt that cannot be ignored
NMI through hardware and software debugging interfaces and system reset buttons. Programmers typically use debugging NMIs to diagnose and correct faulty
Non-maskable_interrupt
2005 operating system version
million Mac OS X users were using Tiger. Apple announced a transition to Intel x86 processors during Tiger's lifetime, making it the first Apple operating system
Mac_OS_X_Tiger
Component of a computer's CPU
"memory-mapped I/O". To a programmer, the registers of the I/O devices appear as numbers at specific memory addresses. x86 PCs use an older method, a separate
Control_unit
IDE for the BASIC programming language
DOS/x86 specific features such as INT 33h mouse access, and multiple timers. Since version 2.0, QB64 now offers debugging abilities, with the new $DEBUG metacommand
QB64
Program translating executable to source code
reverse-engineer because they often retain class structures, method signatures, and debugging information. Executable files stripped of such context are far more challenging
Decompiler
Signal to a computer processor emitted by hardware or software
The mask register may be a single register or multiple registers, e.g., bits in the PSW and other bits in control registers. See INT (x86 instruction)
Interrupt
Computer operating system
64-bit x86 processors, and recently has been ported to RISC-V; there is also a port for ARM under development, but is currently far behind the x86 port
Haiku_(operating_system)
Real-time operating system
for address segments (see x86 memory segmentation). The original 8086 family of processors relied heavily on segment registers to overcome limitations associated
RMX_(operating_system)
8-bit microprocessor
instructions and concepts survive in the widespread x86 platform. Examples include the registers named A, B, C, and D and many of the flags used to control
Intel_8080
Free Common Lisp implementation
SPARC. Early CMUCL releases did not support Intel's x86 architecture due to a lack of registers. CMUCL strictly separated type-tagged and immediate data
CMU_Common_Lisp
Instruction set architecture extension
Synchronization Extensions New Instructions (TSX-NI), is an extension to the x86 instruction set architecture (ISA) that adds hardware transactional memory
Transactional Synchronization Extensions
Transactional_Synchronization_Extensions
Database project devoted to the ranking of computers
Summit was decommissioned on November 15, 2024. While Intel, or at least the x86-64 CPU architecture has previously dominated the supercomputer list, by now
TOP500
On-the-fly translation of code between CPUs
representation such as Java or .NET Common Language Runtime bytecodes. Full-speed debuggers also utilize dynamic recompilation to reduce the space overhead incurred
Dynamic_recompilation
to the NaCl platform. ZeroVM can only execute NaCl code compiled for the x86-64 platform, not the portable Native Client (PNaCl) format. Code executed
ZeroVM
have at some point been present as documented instructions in one or more x86 processors, but where the processor series containing the instructions are
List of discontinued x86 instructions
List_of_discontinued_x86_instructions
Patched software backdoor
appears to perform the injection only when the system is being built on an x86-64 Linux system that uses glibc and GCC and is being built via dpkg or rpm
XZ_Utils_backdoor
32-bit x86 compilation Code generation for AMD64 ABI, AMD Opteron, and Intel EM64T Optimized AMD Core Math Library Advanced multi-threaded debugger PathDB
PathScale
Series of digital signal processor chips
number of condition choices, similar to the choices provided by the x86 flags register. There are two delay slots. After a jump, two instructions following
Super Harvard Architecture Single-Chip Computer
Super_Harvard_Architecture_Single-Chip_Computer
Compiler that optimizes generated code
and take the same time. On many other microprocessors such as the Intel x86 family, it turns out that the XOR variant is shorter and probably faster
Optimizing_compiler
Computer fault caused by access to restricted memory
Windows and Linux (32-bit, x86)". Retrieved 2020-08-23. "Implementation of the SIGSEGV/SIGABRT handler which prints the debug stack trace". GitHub. Retrieved
Segmentation_fault
Events in the history of 16-bit x86 DOS-family disk operating systems
timeline of events in the history of 16-bit x86 DOS-family disk operating systems from 1980 to present. Non-x86 operating systems named "DOS" are not part
Timeline of DOS operating systems
Timeline_of_DOS_operating_systems
British semiconductor and software design company
Sophia Antipolis, France 2001 The engineering team of Noral Micrologics, a debug hardware and software company based in Blackburn, England 2003 Adelante
Arm_Holdings
Specialized computer language used to describe electronic circuits
have full-featured graphical user interfaces, complete with a suite of debug tools. These allow the user to stop and restart the simulation at any time
Hardware_description_language
X86 DEBUG-REGISTER
X86 DEBUG-REGISTER
Surname or Lastname
English
English : perhaps from Middle English, Old French registre ‘register’, ‘book for recording enactments’, hence perhaps a metonymic occupational name for a scribe or clerk.
Surname or Lastname
English and Scottish
English and Scottish : occupational name for a stonemason, Middle English, Old French mas(s)on. Compare Machen. Stonemasonry was a hugely important craft in the Middle Ages.Italian (Veneto) : from a short form of Masone.French : from a regional variant of maison ‘house’.George Mason (1725–92), the American colonial statesman who framed the VA Bill of Rights and Constitution, which was used as a model by Thomas Jefferson when drafting the Declaration of Independence, was a VA planter, fourth in descent from George Mason (?1629–?86), a royalist soldier of the English Civil War who had received land grants in VA. As well as being prominent in the affairs of VA, the family also produced the first governor of MI.
Boy/Male
Arabic, Muslim
Celebrated Abbasid Caliph (786-809)
Surname or Lastname
English
English : of uncertain derivation. The 18th-century parish registers of Marske, North Yorkshire, record the surname Hartburn with the variant Harburn; Harben may be a further variant of this. If so, its origin is probably topographic or habitational, from East Hartburn in Stockton-on-Tees or Hartburn in Northumberland, both named from Old English heorot ‘hart’ + burna ‘steam’. However, this conjecture is not borne out by the distribution of the surname a century later, when it occurs chiefly in Cambridgeshire and London and also with a significant presence in the Channel Islands, perhaps suggesting that it could be a variant of Harpin.
Surname or Lastname
English
English : habitational name from any of several places so called, named with the genitive plural huntena of Old English hunta ‘hunter’ + tūn ‘enclosure’, ‘settlement’ or dūn ‘hill’ (the forms in -ton and -don having become inextricably confused). A number of bearers of this name may well derive it from Huntingdon, now in Cambridgeshire (formerly the county seat of the old county of Huntingdonshire), which is named from the genitive case of Old English hunta ‘huntsman’, perhaps used as a personal name, + dūn ‘hill’.A prominent American family of this name were founded by Simon Huntington, who himself never saw the New World, for he died in 1633 on the voyage to Boston, where his widow settled with her children. Their descendants include Jabez Huntington (1719–86), a wealthy West Indies trader, and Samuel Huntington (1731–96), who was one of the signers of the Declaration of Independence. Collis Potter Huntington (1821–1900) was an American railway magnate. Beginning with little education or money, he made a huge fortune, some of which he left to his nephew, Henry Huntington (1850–1927), who used the money to establish the Huntington library and art gallery in CA.
Boy/Male
Indian
Group; Register of Things
Surname or Lastname
English (Norfolk)
English (Norfolk) : see Register.
X86 DEBUG-REGISTER
X86 DEBUG-REGISTER
Girl/Female
Tamil
Girl/Female
Indian, Telugu
Good Knowledge
Boy/Male
Hebrew
The sun's man.
Female
Finnish
Finnish unisex name VIENO means "gentle."
Male
English
Anglicized form of Gaelic Alaster, ALLASTER means "defender of mankind."
Boy/Male
Indian
The omnipotent, The able
Girl/Female
Tamil
Leenatha | லீநாதாÂ
Humility
Boy/Male
Arabic
Servant of Allah
Biblical
my shepherd; my companion; my friend
Surname or Lastname
English
English : variant spelling of Corbett.
X86 DEBUG-REGISTER
X86 DEBUG-REGISTER
X86 DEBUG-REGISTER
X86 DEBUG-REGISTER
X86 DEBUG-REGISTER
n.
The correspondence or adjustment of the several impressions in a design which is printed in parts, as in chromolithographic printing, or in the manufacture of paper hangings. See Register, v. i. 2.
v. t.
To remove from a roll or register, as a name.
n.
One who registers or records; a registrar; a recorder; especially, a public officer charged with the duty of recording certain transactions or events; as, a register of deeds.
n.
A silver coin of about 86 grains, having the figure of an archer, and hence, in modern times, called a daric.
a.
Registering itself; -- said of any instrument so contrived as to record its own indications of phenomena, whether continuously or at stated times, as at the maxima and minima of variations; as, a self-registering anemometer or barometer.
n.
A register or roll showing the order in which officers, enlisted men, companies, or regiments are called on to serve.
imp. & p. p.
of Register
n.
A rare metallic element, found in certain zinc ores. It is white, hard, and malleable, resembling aluminium, and remarcable for its low melting point (86/ F., 30/C). Symbol Ga. Atomic weight 69.9.
v. i.
To enroll one's name in a register.
v. i.
The compass of a voice or instrument; a specified portion of the compass of a voice, or a series of vocal tones of a given compass; as, the upper, middle, or lower register; the soprano register; the tenor register.
n.
A similar arrangement for registering the number of persons passing through a gateway, doorway, or the like.
n.
To enter in a register; to record formally and distinctly, as for future use or service.
n.
A machine for registering automatically the number of persons passing through a gateway, fares taken, etc.; a telltale.
n.
That which registers or records.
a.
Not enumerated or registered; as, an unpolled vote or voter.
a.
Recording; -- applied to instruments; having an apparatus which registers; as, a registering thermometer. See Recording.
v. i.
To correspond in relative position; as, two pages, columns, etc. , register when the corresponding parts fall in the same line, or when line falls exactly upon line in reverse pages, or (as in chromatic printing) where the various colors of the design are printed consecutively, and perfect adjustment of parts is necessary.
p. pr. & vb. n.
of Register
n.
The office of a register.
n.
A beginning or first attempt; hence, a first appearance before the public, as of an actor or public speaker.