ARM Compiler toolchain Using the Linker - ARM Information Center

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10.7 Manual import and export for BPABI models 10.7.1 See also Linker steering files can be used to: • manually control dynamic import and export • override the automatic rules. BPABI and SysV shared libraries and executables The steering file commands available to control the dynamic symbol table contents are: • EXPORT • IMPORT • REQUIRE. Concepts • What is a steering file? on page 7-23. Reference Linker Reference: • EXPORT on page 3-2 • IMPORT on page 3-4 • REQUIRE on page 3-7. Other information • SysV ELF specification. ARM DUI 0474C Copyright © 2010-2011 ARM. All rights reserved. 10-10 ID080411 Non-Confidential
10.8 Symbol versioning for BPABI models 10.8.1 See also BPABI and SysV shared libraries and executables Symbol versioning provides a way to tightly control the interface of a shared library. When a symbol is imported from a shared library that has versioned symbols, armlink binds to the most recent (default) version of the symbol. At load or run-time when the platform OS resolves the symbol version, it always resolves to the version selected by armlink, even if there is a more recent version available. This process is automatic. When a symbol is exported from an executable or a shared library, it can be given a version. armlink supports implicit symbol versioning where the version is derived from the shared object name (set by --soname), or explicit symbol versioning where a script is used to precisely define the versions. Concepts • Linker options for SysV models on page 10-13 • About symbol versioning on page 10-27. Reference Linker Reference: • --soname=name on page 2-151. Other information • SysV ELF specification. ARM DUI 0474C Copyright © 2010-2011 ARM. All rights reserved. 10-11 ID080411 Non-Confidential
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® ARM Copyright © 2010-2011 ARM.
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Contents ARM Compiler toolchain Usi
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Contents 7.15 Creating a symdefs fi
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Chapter 1 Conventions and feedback
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Chapter 2 Overview of the linker Th
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Concepts • Demand paging on page
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2.3 Linker command-line options lis
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• --keep_protected_symbols on pag
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• --eager_load_debug, --no_eager_
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2.5 What the linker outputs 2.5.1 S
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Chapter 3 Linking models supported
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3.2 Bare-metal linking model 3.2.1
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Linking models supported by armlink
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3.5.1 See also • There are restri
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3.7 Concepts common to both BPABI a
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Image structure and generation •
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4.1.1 See also Image structure and
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4.3 Load view and execution view of
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4.4 Methods of specifying an image
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4.5 Types of simple image 4.5.1 See
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4.10 About specifying an initial en
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4.11.2 Example 4.11.3 See also The
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4.13 Section alignment with the lin
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Reference Linker Reference: • --a
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4.16 Overview of veneers 4.16.1 See
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4.18 Veneer types 4.18.1 See also I
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4.20 Reuse of veneers when scatter-
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4.22 About weak references and defi
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BL init_foo ;Rest of code END 4.22.
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Image structure and generation 4.24
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4.25 Specifying user libraries when
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4.27 Use of the strict family of op
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5.1 Elimination of common debug sec
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5.3 Elimination of unused sections
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5.4 Elimination of unused virtual f
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• --scatter=file on page 2-142. C
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5.6.1 See also Using linker optimiz
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3. Creates the output image. 5.7.3
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5.9 How the linker chooses a compre
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5.11 How compression is applied 5.1
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5.13 Inlining functions with the li
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Reference Assembler Reference: •
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5.16 About reordering of tail calli
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5.18 About merging comment sections
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6.1 Linker options for getting info
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6.3 Example of using the --info lin
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6.4 How to find where a symbol is p
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• Load$$LR$$ load region symbols
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7.2 Accessing linker-defined symbol
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7.4 Image$$ execution region symbol
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7.5.1 See also Accessing and managi
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7.7 Region name values when not sca
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7.9 Importing linker-defined symbol
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7.11 Section-related symbols 7.11.1
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7.13 Input section symbols 7.13.1 S
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7.15 Creating a symdefs file 7.15.1
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7.17 Reading a symdefs file 7.17.1
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7.18.2 See also 0x0000814D T __argv
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7.20 Specifying steering files on t
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7.22 Steering file format 7.22.1 Se
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7.24 Using $Super$$ and $Sub$$ to p
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Using scatter files • Images with
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8.2 When to use scatter-loading 8.2
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• --startup=symbol, --no_startup
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8.4.1 See also Concepts • About s
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8.5.1 See also } SRAM 0x8000 0x8000
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8.7 Specifying stack and heap using
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8.9 Creating root execution regions
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8.9.2 See also Tasks • Using the
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8.11 Placing functions and data at
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Using scatter files RAM 0x200000 (0
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Using scatter files • Using __at
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Developing Software for ARM ® Proc
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} } .ANY1(+RO) ; evenly distributed
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8.14 Examples of using placement al
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Using scatter files 8.15 Example of
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8.16 Examples of using sorting algo
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8.17 Selecting veneer input section
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Compiler Reference: • __attribute
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8.20 Restrictions on placing __at s
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8.21.1 See also Using scatter files
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8.23 Placing a key in flash memory
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Page 193 and 194: Using scatter files • The ER_ZI e
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Page 229 and 230: 10.13 Addressing modes in the SysV
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Page 239 and 240: 10.23 About symbol versioning 10.23
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Page 245 and 246: Chapter 11 Features of the Base Pla
Page 247 and 248: Features of the Base Platform linki
Page 249 and 250: 11.2 Example scatter file for the B
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Page 253: Change Topics affected Revisions fo
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