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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
Steering file command summary
| Non-Confidential |  PDF version | ARM DUI0377H | ||
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| Home > Accessing and Managing Symbols with armlink > Edit the symbol tables with a steering file > Steering file command summary | ||||
6.6.2 Steering file command summary
Steering file commands enable you to manage symbols in the symbol table, control the copying of symbols from the static symbol table to the dynamic symbol table, and store information about the libraries that a link unit depends on.
For example, you can use steering files to protect intellectual property, or avoid namespace clashes.
The steering file commands are:
Table 6-6 Steering file command summary
| Command | Description |
|---|---|
EXPORT |
Specifies that a symbol can be accessed by other shared objects or executables. |
HIDE |
Makes defined global symbols in the symbol table anonymous. |
IMPORT |
Specifies that a symbol is defined in a shared object at runtime. |
RENAME |
Renames defined and undefined global symbol names. |
REQUIRE |
Creates a DT_NEEDED tag in the dynamic array.
DT_NEEDED tags specify dependencies to other shared objects used
by the application, for example, a shared library. |
RESOLVE |
Matches specific undefined references to a defined global symbol. |
SHOW |
Makes global symbols visible. This command is useful if you want to make a specific symbol visible that is hidden using a HIDE command with a wildcard. |
Note
The steering file commands control only global symbols. Local symbols are not affected by any of these commands.Related reference
| Non-Confidential | PDF version | ARM DUI0377H |
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