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brk and sbrk are basic memory management system calls used in Unix and Unix-like operating systems to control the amount of memory allocated to the heap segment of the process. [1] These functions are typically called from a higher-level memory management library function such as malloc .
Code for a simple model implementation of a storage manager for Unix was given with alloc and free as the user interface functions, and using the sbrk system call to request memory from the operating system. [6] The 6th Edition Unix documentation gives alloc and free as the low-level memory allocation functions. [7]
The use of BRK and/or COP to request an operating system service means user applications do not have to know the entry address of each operating system function, only the correct signature byte to invoke the desired operation. Hence relocation of the operating system in memory will not break compatibility with existing user applications.
BRK is an interrupt in 65xx processors. BRK may also refer to: "brk" and sbrk, Unix system calls; B-R-K, a Semitic root of given name Barak; BRK.A and BRK.B, NYSE symbols of Berkshire Hathaway; BRK Brands, US, retail brand First Alert; Berkshire, county in England, Chapman code; Brioche-knit stitch in brioche knitting; Birgid language, ISO 639 ...
Berkshire Hathaway Inc. (NYSE: BRK.A, BRK.B) stock is the Taj Mahal of company stocks, long known for its sky-high Class A share price and for its iconic -- and refreshingly unassuming -- chairman ...
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In computing, a data segment (often denoted .data) is a portion of an object file or the corresponding address space of a program that contains initialized static variables, that is, global variables and static local variables.
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