.map 파일에서 'Linker created', 'Lc', 'Gb', 'Wk'는 무엇입니까?

기술노트 81528

아키텍처:

ARM, RiscV, RH850, RL78, RX, SH, STM8

컴포넌트:

linker

업데이트:

2021-06-30 오전 3:46

소개

본 기술 노트는 다음에 적용됩니다:

IAR Embedded Workbench
ARM
SH
STM8
RH850
RX
RL78
RiscV

Versions
5.10 and later
2.10 and later
1.10 and later
1.10 and later
2.10 and later
2.10 and later
1.10 and later

1. 'Linker created' 란 ?

답

IAR ILINK Linker에 의해 수행되는 추가 할당(extra allocations)입니다.

예제

예제 링커 파일에서 발췌한 내용입니다:

  Module           ro code    ro data    rw data
  ------           -------    -------    -------
...
...
  Linker created       140        123      2 980
 -----------------------------------------------
  Grand Total:      76 888      3 800      5 716

설명

3개의 다른 머리글은 IAR ILINK 링커의 추가 내용에 해당합니다:

Kind of section	Section type	Explanation
`ro code`	`Veneer`	These are "helpers" used in order to achive jumps in the whole address area, i.e. longer than +-4 MB / +-32 MB (Thumb/Arm mode).
`ro data`	`.iar.init_table`	The table which is used during start-up to control the initialization.
`ro data`	`Initializer bytes`	If any symbols placed in RAM are to be initialized manually, then "Initializer bytes' are created by the linker.
`rw data` `ro data`	`uninit`	If the `define block` directive is combined with the parameter size in the `.icf` file, this will order the linker to create a block of the specified size. So when linking, each such block will be filled by the linker. The linker directive for a block that holds a stack must use the `size` parameter. The whole block is marked `uninit`, (as a stack is an empty when it comes to linking). A `block` that is not a stack (and marked with the size parameter) can more or less filled with defined variables in the block. All unused bytes in the block become marked with "`uninit`".
`rw data`	`.iar.dynexit`	Holds the table of calls to be made at exit.

2. 'Lc','Gb','Wk' 란?

답

ELF에는 다음과 같은 네 가지 유형의 속성이 정의되어 있습니다:

Lc = local.
Gb = global.
Wk = weak.
?? = unknown.

예제

예제 링커 파일의 내용입니다:

Undefined_Handler     0x00000274          Code   Wk   vectortrap.o [4]

Region$$Table$$Base   0x08002d2c          --     Gb   - Linker created -
Region$$Table$$Limit  0x08002d50          --     Gb   - Linker created -

SysTick_Config        0x08002667   0x32   Code   Lc   main.o [1]

모든 제품 이름은 해당 소유자의 상표 또는 등록 상표입니다.