ARM Compiler toolchain Using the Linker - ARM Information Center

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10.12.2 See also • __bss_start__ • _bss_end__ • __bss_end__ • end • _end • __end • __end__ BPABI and SysV shared libraries and executables Concepts • Linker options for SysV models on page 10-13 • Automatic dynamic symbol table rules in the SysV memory model on page 10-15 • Addressing modes in the SysV memory model on page 10-17 • Thread local storage in the SysV memory model on page 10-18 • Related linker command-line options for the SysV memory model on page 10-19. Reference • --export_all, --no_export_all on page 2-64 • --export_dynamic, --no_export_dynamic on page 2-65 • --keep_protected_symbols on page 2-91. Other information • ELF for the ARM Architecture, http://infocenter.arm.com/help/topic/com.arm.doc.ihi0044-/index.html ARM DUI 0474C Copyright © 2010-2011 ARM. All rights reserved. 10-16 ID080411 Non-Confidential
10.13 Addressing modes in the SysV memory model 10.13.1 Position independent code 10.13.2 See also BPABI and SysV shared libraries and executables System V (SysV) has a defined model for accessing the program and imported data and code from other models. If required, the linker automatically generates the required Procedure Linkage Table (PLT) and Global Offset Table (GOT) sections. SysV shared libraries are compiled with position independent code using the --apcs=/fpic compiler command-line option. The linker command-line option --fpic must also be used to declare that a shared library is position independent because this affects the construction of the PLT and GOT sections. Note By default, the linker produces an error message if the command-line option --shared is given without the --fpic options. If you must create a shared library that is not position independent, you can turn the error message off by using --diag_suppress=6403. Concepts • Linker options for SysV models on page 10-13 • Automatic dynamic symbol table rules in the SysV memory model on page 10-15 • Addressing modes in the SysV memory model • Thread local storage in the SysV memory model on page 10-18 • Related linker command-line options for the SysV memory model on page 10-19. Reference Linker Reference: • --diag_suppress=tag[,tag,...] on page 2-47 • --fpic on page 2-74 • --import_unresolved, --no_import_unresolved on page 2-79 • --shared on page 2-146. Compiler Reference: • --apcs=qualifer...qualifier on page 3-11. ARM DUI 0474C Copyright © 2010-2011 ARM. All rights reserved. 10-17 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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8.25 Placement of sections with ove
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8.25.1 See also Using scatter files
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8.27 Example of placing code in a r
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Page 249 and 250: 11.2 Example scatter file for the B
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