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Portion of an object file containing executable instructions
In computing, a code segment, also known as a text segment or simply as text, is a portion of an object file or the corresponding section of the program's
Code_segment
Memory segmentation on Intel x86
16-bit segment registers to derive the actual memory address. In real mode, the registers CS, DS, SS, and ES point to the currently used program code segment
X86_memory_segmentation
Storage segment
family of CPUs provided four segments: the code segment, the data segment, the stack segment and the extra segment. Each segment was placed at a specific
Data_segment
Machine instruction code that executes properly regardless of where in memory it resides
has a code segment and a linkage segment. The code segment contains only code and the linkage section serves as a template for a new linkage segment. Pointer
Position-independent_code
Division of computer's primary memory into separately relocatable segments or sections
alone. Segments may be created for program modules, or for classes of memory usage such as code segments and data segments. Certain segments may be shared
Memory_segmentation
Computer memory that can be accessed by multiple processes
In computer science, shared memory is memory that may be simultaneously accessed by multiple programs with an intent to provide communication among them
Shared_memory
Topics referred to by the same term
Segment descriptor Data segment Code segment Image segmentation, the process of partitioning a digital image into multiple segments Time-series segmentation
Segment
Concept in computer architecture
S=System Segment If clear, this is system segment, used to handle interrupts or store LDT segment descriptors. If 1, this is Code/Data segment. Type If
Segment_descriptor
Unconditional jump instruction in x86 assembly language
within the current code segment (pointed to by the CS register). The target can be an absolute offset (address within the segment) or a relative offset
JMP_(x86_instruction)
Electronic display device for displaying digits and some letters
A segment display is a display device comprising several segments, which switch on and off to give the appearance of digits or alphanumeric characters
Segment_display
Assigning or adjusting addresses at runtime
typically segmented into various memory segments or section types. Example segment types include code segment (.text), initialized data segment (.data)
Relocation_(computing)
Set of memory models of the x86 CPU
(data segment), CS (code segment), SS (stack segment), and ES (extra segment). Another 16-bit register can act as an offset into a given segment, and so
X86_memory_models
Fault initiated by x86 processors due to an access violation
CS a code segment (CS) loaded with a segment selector for a data, system, or null segment SS, DS, ES, FS, or GS are segments loaded with a segment selector
General_protection_fault
Executable file format used for .EXE files in MS-DOS
Program Segment Prefix. EXE files normally have separate segments for the code, data, and stack. Program execution begins at address 0 of the code segment, and
DOS_MZ_executable
Code section for declared statically-allocated variables
programmers should not depend on that. Linker (computing) Data segment (.data) Code segment (.text) Uninitialized variable McKusick, Marshall Kirk; Karels
.bss
Data structure in DOS
int 21h In DOS 1.x, it was necessary for the CS (Code Segment) register to contain the same segment as the PSP at program termination, thus standard programming
Program_Segment_Prefix
Computer fault caused by access to restricted memory
portion of the data segment of a program are writable, while read-only data allocated in the const segment and the code segment are not writable. Thus
Segmentation_fault
Operational mode of x86-compatible CPUs
with a minimum of three entries: a null descriptor, a code segment descriptor and data segment descriptor. Then, the PE bit must be set in the CR0 register
Protected_mode
Reference to a specific memory location
memory of following types: Machine code, including: program's own code (historically known as code segment or text segment); shared libraries. Data, including:
Memory_address
CPU optimization unit
should be followed by offset (rm = "dw", pm = "dd") code_segment: dw 0 ; and then the code segment (calculated above) flush_queue: ; 0x40 = opcode "inc
Prefetch_input_queue
Amount of memory a computer program uses
active memory regions like code segment containing (mostly) program instructions (and occasionally constants), data segment (both initialized and uninitialized)
Memory_footprint
Software that executes source code directly
source code without first compiling it to machine code. An interpreted runtime environment differs from one that processes CPU-native executable code which
Interpreter_(computing)
Hardware that translates virtual addresses to physical addresses
trying compaction (since the system is segmented, not paged), deallocating read-only segments (such as code segments which can be restored from their original
Memory_management_unit
File format for conveying binary information
in code segment), 82 (data in data segment), 83 (data in stack segment), 84 (data in extra segment), 85 (paragraph address for absolute code segment),
Intel_HEX
Concept in computer security
CPUs without an NX bit, Exec Shield fails to protect pages below the code segment limit; an mprotect() call to mark higher memory, such as the stack, executable
Executable-space_protection
Type of simple executable file
(FF00h) bytes (256 bytes short of 64 KiB) and store all its code and data in one 8086 memory segment. Although COM files are written as if they all start at
COM_file
16-bit microprocessor
program's code or data segment and so can be used only within parts of a program small enough to fit in one segment. Far pointers are 32-bit segment:offset
Intel_8086
Product identifier for drugs in the US
as Generic Product Identifier (GPI). The national drug code is a unique 10 or 11 digit, 3-segment numeric identifier assigned to each medication listed
National_drug_code
Adaptive immunity variety-generation process
forming two DNA ends: a hairpin (stem-loop) on the coding segment and a blunt end on the signal segment. The current model is that DNA nicking and hairpin
V(D)J_recombination
Range of mainframe computers in the 1960s and 70s
stack. The D[1] environment is the code segment dictionary, which is shared by all processes running the same code. The D[0] environment represents entities
Burroughs_Large_Systems
Family of backward-compatible assembly languages
the offset address of the next instruction to be executed within the code segment (CS). It points to the first byte of the next instruction. While the
X86_assembly_language
Variant of real mode in x86 computing
Grysztar) adds the ability to run 32-bit code with a 4 GiB code segment. This is achieved by loading the code selector (CS) from a descriptor having the
Unreal_mode
Programming method
into self-contained object code blocks called overlays or links, generally laid out in a tree structure. Sibling segments, those at the same depth level
Overlay_(programming)
File containing relocatable format machine code
control information) Code segment ("text segment", executable code) Data segment (initialized static variables) Read-only data segment (rodata, initialized
Object_file
Computer science process
unlocking code. […] The low nibble of the interrupt vector (80h–8Fh) holds bit 4 through 7 of the segment handle. Bit 0 to 3 of a segment handle are
Dynamic_dispatch
Time-sharing operating system
code segment to which it had dynamically linked (a code segment that implemented some operation associated with the daemon). The code in that segment
Multics
Software program
Its functions include organizing and coding source materials, writing memos, retrieving and querying coded segments, managing cases and associated variables
MAXQDA
Signal in the system bus of an x86-based computer system
the HMA), that is, a load segment < 64 Kb. Otherwise they would display "Packed file corrupt". The code checks that the code's entry point [...] is not
A20_line
Address from which a CPU starts fetching instructions after a reset
top of the address space, the high 12 bits of addresses issued for the code segment are set, until the first instruction which loads the CS register, such
Reset_vector
Successor to the Intel 386
Just as in the i386, a flat 4 GB memory model could be implemented. All "segment selector" registers could be set to a neutral value in protected mode,
I486
32-bit microprocessor by Intel
recursive code and has been used by Algol-like languages since the late 1950s. A flat memory model is assumed, specifically, that the DS and ES segments address
I386
1977 programming language implementation
the PC was restricted to one 64K code segment and one 64K stack/heap data segment; Version IV removed the code segment limit but cost a lot more[quantify])
UCSD_Pascal
Low-level programming language family
printed by a single operating system call: section .text ; start of the code segment global _start ; declare _start to be visible in the generated object
Assembly_language
Topics referred to by the same term
punctuation symbol Underbar, a line under a formula or segment of text Overbar, a line over a formula or segment of text Bar (diacritic), a line through a letter
Bar
Topics referred to by the same term
practical approach to computation and its applications CS register, or code segment register, in X86 computer architecture Cable select, an ATA device setting
CS
Topics referred to by the same term
action film SIU, a 2019 Vocaloid album Siuna Airport in Nicaragua (IATA Code) Segment of Independent Utility, a highway engineering term for divisions of
SIU
portions or even which elements of the array are accessed by a given code segment (basic block, loop, or even at the procedure level). Array-access analysis
Array-access_analysis
Memory data structure in Intel processors
defines: Code segments: regions of memory that contain executable instructions. Data segments: areas used to store program data. System segments, like the
Global_Descriptor_Table
Operating system memory security feature
limited processors such as the Intel i386, W^X requires using the CS code segment limit as a "line in the sand", a point in the address space above which
W^X
Undocumented Intel 80286 and 80386 instructions
operation. LOADALL had the unique ability to set up the visible part of the segment registers (selector) independently of their corresponding cached part,
LOADALL
{\displaystyle k} iterates starting at 2. The following 4 line MATLAB code segment implements the MPE algorithm: U = x(:, 2:end - 1) - x(:, 1:end - 2);
Minimum polynomial extrapolation
Minimum_polynomial_extrapolation
Family of instruction set architectures
segment addresses and offsets within segments. It is technically possible to use up to 256 KB of memory for code and data, with up to 64 KB for code,
X86
Area code in southeast Texas, United States
three sections. Area code 409 was retained by the eastern segment, while the central portion, centered on Nacogdoches, received area code 936 and the western
Area_code_409
Restore a system to a previous stable state
contains a JMP instruction that redirects the CPU to execute the initialization code of BIOS. This JMP instruction is absolutely the first instruction executed
Reset_(computing)
Semi-formal European car size classification
vehicle segments in Europe do not have formal characterization or regulations. Although the definition is vague, there is little overlap between segments A–F
Euro_Car_Segment
Quickly accessible working storage available as part of a digital processor
performance. Register allocation is performed either by a compiler in the code generation phase, or manually by an assembly language programmer. Registers
Processor_register
Analysis tool in Unix-like systems
but also the application's own code segment, allowing the controller to install breakpoints and patch the running code of the target. As the ability to
Ptrace
Hardware verification language
providing for more organized file partitioning. Executable e code is enclosed within code-segment markers <' and '>: Anything outside the markers is a comment
E_(verification_language)
Firmware for hardware initialization and OS runtime services
top of the address space, the high 12 bits of addresses issued for the code segment are set, until the first instruction which loads the CS register, such
BIOS
Section of a source code file that is treated as if it were a separate file
form of data segment. In these languages, including the line __DATA__ (Perl) or __END__ (Ruby, old Perl) marks the end of the code segment and the start
Here_document
Way for programs to access kernel services
far call (a call to a procedure located in a different segment than the current code segment) which uses x86 memory segmentation and the resulting lack
System_call
Way to control memory access rights on a computer
processors had 4 segment registers, CS (code segment), SS (stack segment), DS (data segment) and ES (extra segment); later another two segment registers were
Memory_protection
Syllable repertoire of B5900, B6500, B7500 and successors
stack. The D[1] environment is the code segment dictionary, which is shared by all processes running the same code. The D[0] environment represents entities
Burroughs B6x00-7x00 instruction set
Burroughs_B6x00-7x00_instruction_set
Process of modifying data based on one reference to another
shared libraries loadable in the system. IBM VM/370 discontinuous saved segments (DCSS) were an early example of this technique, though not called rebasing
Rebasing
Different products from the same gene
splicing mechanisms, mRNA has the ability to select different protein-coding segments (exons) of a gene, or even different parts of exons from RNA to form
Isoform
offset to IVT entry 1 mov word ptr es:[1*4 + 2], cs ; write current code segment to IVT entry 1 ; Turn on the trace trap pushf ; push FLAGS onto stack
Trace_vector_decoder
Topics referred to by the same term
numeric code Trunk access code, used to dial a domestic call International access code, used to dial an international call Area code, a segment of a telephone
Access_code
UN taxonomy of goods and services
a new segment 57000000 — Humanitarian Relief Items, Kits, or Accessories, requested by United Nation Global Marketplace (UNGM); additional codes were added
UNSPSC
Set of codewords, none a prefix of another
system that is a prefix (initial segment) of any other code word in the system. It is trivially true for fixed-length codes, so only a point of consideration
Prefix_code
Numeric postal code used in the US and its territories
codes", or "add-ons". A ZIP+4 Code uses the basic five-digit code plus four additional digits to identify a geographic segment within the five-digit delivery
ZIP_Code
36-bit computer by Digital (1966–1983)
separate read-only shareable code segment (normally the high segment) and read-write data/stack segment (normally the low segment) used by TOPS-10 and later
PDP-10
Set of techniques employed by microprocessors
same memory address. The three dependencies are shown in the preceding code segment (reproduced for clarity): 1: div $27, $20 2: sw $27, 0($30) 3: lw $08
Memory_disambiguation
High-level programming language
childset[0].parent.childset[0].parent # and so on... In the following code: we assign a code segment to the right child of the = node, we execute the = node a second
PCASTL
Family of 16-bit and 32-bit minicomputers
much as 64KB of memory in a code segment, but calling a routine was based on segment number and routine number within a segment, so a program could theoretically
HP_3000
Microcontroller
transfers use the concatenation of a 16-bit register address and a 4-bit "code segment" register. Unlike the 8086 microprocessor, there are no separate near
RL78
Software anomaly
point to data in a code segment (.text on Linux) or every other executable section of the program. The goal is to reuse existing code. Consists to overwrite
Stack_buffer_overflow
results and a status code. In any full-function IMS database, the smallest element that can be retrieved is a segment. Each segment is made up of fields
Data_Language_Interface
Named container for a particular type of data
functions are also referred to as variables. For instance, in this Python code segment, def add_two(x: int) -> int: return x + 2 print(add_two(5)) # prints:
Variable (high-level programming language)
Variable_(high-level_programming_language)
Computer memory management scheme
program segments became the units exchanged between secondary storage and RAM. A segment was the program's entire code segment or data segment, or sometimes
Memory_paging
File format for executables, object code, shared libraries, and core dumps
and object code. Each Mach-O file is made up of one Mach-O header, followed by a series of load commands, followed by one or more segments, each of which
Mach-O
of protein-coding DNA sequences. The existence of this property can be shown by performing Fourier analysis on signals derived from segments of DNA sequences
3-Base_Periodicity_Property
Internet error message
In HTTP, the 404 HTTP status code indicates that a web client (i.e. browser) was able to communicate with a server, but the server could not provide the
HTTP_404
Device for decoding a substitution cipher
sure to drink your Ovaltine", unlike the actual broadcasts' secret code segments, which usually previewed the upcoming episode. Caesar cipher – Simple
Secret_decoder_ring
1985 Microsoft operating system version
operating environment could also move the program code and data segments in memory, to allow programs to share code and data that are located in dynamic-link
Windows_1.0
2006 mystery thriller film by Ron Howard
The Da Vinci Code is a 2006 mystery thriller film directed by Ron Howard, written by Akiva Goldsman, and based on Dan Brown's 2003 novel of the same name
The_Da_Vinci_Code_(film)
Compiler that optimizes generated code
an optimal set of macros that minimizes the space required by a given code segment is known to be NP-complete, but efficient heuristics attain near-optimal
Optimizing_compiler
Computer science concept
any code is run that assumes that data can be accessed normally. This can be done as part of the previous stage, or within a small code segment at the
Execute_in_place
Software that emulates an entire computer
This is especially useful for read-only pages, such as those holding code segments, which is the case for multiple virtual machines running the same or
Virtual_machine
Software design pattern
value until the first time it is accessed. Consider, for example, this code segment in the Java programming language: // Single-threaded version public class
Double-checked_locking
Process in marketing
segments. The objective is to identify profitable and growing segments that a company can target with tailored marketing strategies. When segmenting markets
Market_segmentation
Image file format with multiple editions
method of coding the resolution or aspect ratio of an image. JFIF provides resolution or aspect ratio information using an application segment extension
JPEG_File_Interchange_Format
Segment of code in beta release of Windows 3.1
The AARD code was a segment of code in a beta release of Microsoft Windows 3.1 that would issue a cryptic error message when run on the DR DOS operating
AARD_code
Programming language by Hewlett-Packard
to up to 254 code segments of up to 32K words each. The code segments were divided into two domains: the first 191 were "system" segments shared by all
Systems_Programming_Language
Area codes in Manhattan, New York
by-passed segment of the Harlem River was filled in 1914, making the community a geographic part of the Bronx. When the Bronx was reassigned with area code 718
Area_codes_212,_646,_and_332
System for identifying vehicles
identification number (VIN; also called a chassis number or frame number) is a unique code, including a serial number, used by the automotive industry to identify individual
Vehicle_identification_number
Changing between languages during a conversation
In linguistics, code-switching or language alternation is the process of shifting from one linguistic code (a language or dialect) to another, depending
Code-switching
Syllable repertoire for B5000, B5500 and B5700
of the first computers to implement segmented virtual memory (dividing memory into logical segments, such as code and data, that allow for better isolation
B5000_instruction_set
X86 assembler
Another include file, containing the application and DLL startup source code. Segment and PE section management macros. Macros related to Unicode support
Open_Watcom_Assembler
Optical machine-readable representation of data
A barcode or bar code is a method of representing data in a visual, machine-readable symbolic form. Initially, barcodes represented data by varying the
Barcode
tcp.msl: Maximum segment lifetime net.inet.tcp.msl: 30000 In Linux, the time-wait interval is defined by the TCP_TIMEWAIT_LEN, hard-coded as 60 seconds.
Maximum_segment_lifetime
travel, tourism, insurance
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travel, tourism, insurance