oss bss

Linux the segment management,BSS A segment (BSS segment) usually refers to an area of memory that is used to hold uninitialized global variables in the program. BSS is the abbreviation for English block Started by symbol. BSS segments belong to static memory allocations.This segment is used to store uninitialized globa

Before our startup file clears BSS and copies are implemented by the way of assembly, however, we are able to use the C language without using the assembler:First look at the connection script: sections{. = 0x30000000 ; __code_start =.; . = ALIGN (4 * (. Text)}. = ALIGN (4 * (. Rodata)}. = ALIGN (4 * = ALIGN (4 =.; . BSS: { * (. BSS)

Link scripts generally contain similar statements: _ Bss_start = .; __bss_start _ = .;. bss :{*(. shbss )*(. bss. bss. *. gnu. linkonce. b. *) * (COMMON )}. = ALIGN (4); _ bss_end = .; __bss_end _ = .; The code for the startup process is generally compiled as follows: @ ++ Clear the BSS section ++ ldr r2, =__ bss_st

Copyleft in this article belongs to the gfree.wind@gmail.com, the use of GPL release, can be freely copied, reproduced. However, please maintain the integrity of the document and indicate the original author and original link. It is strictly prohibited to use the document for any commercial purposes.By gfree.wind@gmail.comBlog: linuxfocus.blog.chinaunix.netRecently, I am reviewing the book "Programmer self-cultivation", because the level has improved compared with the previous one, so the readin

Different compiler may have slightly different allocations for storage during compilation, but the basic structure is roughly the same.Broadly, it can be divided into three segments: text, data, and BSS.The text section is used for storing code, which is typically mapped as read-only in memory, but data and BSS are writable.Data storage is usually divided into the following sections:1, stack: Automatically allocated by the compiler, save the function

BSS segments: In a segmented memory management architecture, BSS segments (BSS segments) are generally a memory area used to store uninitialized global variables in the program. BSS is short for block started by symbol. BSS segments belong to static memory allocation. Data S

BSS:(BSS segment) usually refers to an area of memory that is used to store uninitialized global variables in the program. BSS is the abbreviation for English block Started by symbol. BSS segments belong to static memory allocations.Data Segment: Data segment usually refers to an area of memory that is used to hold the

BSS segment: (BSS segment) refers to a memory area used to store uninitialized global variables in the program. BSS is an English Block Short for started by symbol. BSS segments belong to static memory allocation. Data Segment: a data segment is usually a memory area used to store initialized global variables in the

Executable programs include BSS segments, data segments, and code segments (also called text segments ). 1. bssbss (block started by symbol) is usually a memory area used to store uninitialized global variables and static variables in the program. Features: read/write, BSS segments are automatically cleared before the program is executed. Therefore, the uninitialized global variables are 0 before the progra

BSS segment in program, data segment, code snippet (. Text), heap (heap), stack (stack). BSS segment: Uninitialized and initialized to 0 global variables and static local variables (static) initialized to 0 in the program. Data segment: Non-zero initialized global variables and non-zero initialized static local variables (static) in the programCode Snippet: the place (. Text field) where the code is stored,

In memory management, memory is divided into: System reserve, code area, global variable area, heap, and stack.The global variable area can also be divided into: Data segment and BSS segment.The data segment is used to store initialized global variables, static variables, and literal constants.The BSS segment is used to store uninitialized global variables, static variables."Program Instance 1"#include usin

Start. S clear bss segment, start. sbss segment Start. S . Global _ start. global _ end. align 2. text_start: B reset ldr pc, _ undefined_instruction ldr pc, _ Your ldr pc, _ prefetch_abort ldr pc, _ data_abort ldr pc, _ not_used ldr pc, _ irq ldr pc, _ fiq_undefined_instruction :. word und_software_interrupt :. word svc_prefetch_abort :. word pre_abort_data_abort :. word data_abort_not_used :. word 0x12345678_irq :. word irq_fiq :. word fiqreset: mo

A program is generally divided into three sections: Text, data, and BSS. Text: it refers to the code of the program. It is determined during compilation, read-only, and data segment: data that can be determined at the compilation stage (rather than the runtime). readable and writable data is usually referred to as the static storage area. The global and static variables with initial values are stored in this area, constants are also stored in the