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Technical Support
On-Line Manuals
Linker User Guide
Preface
Overview of the Linker
Linking Models Supported by armlink
Image Structure and Generation
Linker Optimization Features
Getting Image Details
Accessing and Managing Symbols with armlink
About mapping symbols
Linker-defined symbols
Region-related symbols
Types of region-related symbols
Image$$ execution region symbols
Load$$ execution region symbols
Load$$LR$$ load region symbols
Region name values when not scatter-loading
Linker defined symbols and scatter files
Methods of importing linker-defined symbols in C a
Methods of importing linker-defined symbols in ARM
Section-related symbols
Types of section-related symbols
Image symbols
Input section symbols
Access symbols in another image
Creating a symdefs file
Outputting a subset of the global symbols
Reading a symdefs file
Symdefs file format
Edit the symbol tables with a steering file
Specifying steering files on the linker command-li
Steering file command summary
Steering file format
Hide and rename global symbols with a steering fil
Use of $Super$$ and $Sub$$ to patch symbol definit
Scatter-loading Features
Scatter File Syntax
Linker Command-line Options
Linker Steering File Command Reference
Via File Syntax
Methods of importing linker-defined symbols in C and C++
| Non-Confidential |  PDF version | ARM DUI0377H | ||
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| Home > Accessing and Managing Symbols with armlink > Region-related symbols > Methods of importing linker-defined symbols in C and C++ | ||||
6.3.7 Methods of importing linker-defined symbols in C and C++
You can import linker-defined symbols into your C or C++ source code. They are external symbols and you must take the address of them.
The only case where the
& operator is
not required is when the array declaration is used, for example extern char symbol_name[];.The following examples show how to obtain the correct value:
- Importing a linker-defined symbol
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extern unsigned int Image$$ER_ZI$$Limit; config.heap_base = (unsigned int) &Image$$ER_ZI$$Limit;
- Importing symbols that define a ZI output section
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extern unsigned int Image$$ER_ZI$$Length; extern char Image$$ER_ZI$$Base[]; memset(Image$$ER_ZI$$Base,0,(unsigned int)&Image$$ER_ZI$$Length);
Related reference
| Non-Confidential | PDF version | ARM DUI0377H |
| Copyright © 2007, 2008, 2011, 2012, 2014-2016 ARM. All rights reserved. |
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