ARM Compiler toolchain Using the Linker - ARM Information Center

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8.26 About placing ARM C and C++ library code 8.26.1 See also Using scatter files You can place code from the ARM standard C and C++ libraries in a scatter file. Use *armlib or *cpplib* so that the linker can resolve library naming in your scatter file. Some ARM C and C++ library sections must be placed in a root region, for example __main.o, __scatter*.o, __dc*.o and *Region$$Table. This list can change between releases. The linker can place all these sections automatically in a future-proof way with InRoot$$Sections. Tasks • Creating root execution regions on page 8-14 • Using the FIXED attribute to create root regions on page 8-17. Concepts • What is a root region? on page 8-13 • Example of placing code in a root region on page 8-48 • Example of placing ARM C library code on page 8-49 • Example of placing ARM C++ library code on page 8-50. ARM DUI 0474C Copyright © 2010-2011 ARM. All rights reserved. 8-47 ID080411 Non-Confidential
8.27 Example of placing code in a root region 8.27.1 See also Using scatter files Use a scatter file to specify a root section in the same way as a named section. The following example uses the section selector InRoot$$Sections to place all sections that must be in a root region: Example 8-18 Specifying a root region ROM_LOAD 0x0000 0x4000 { ROM_EXEC 0x0000 0x4000 ; root region at 0x0 { vectors.o (Vect, +FIRST) ; Vector table * (InRoot$$Sections) ; All library sections that must be in a ; root region, for example, __main.o, ; __scatter*.o, __dc*.o, and * Region$$Table } RAM 0x10000 0x8000 { * (+RO, +RW, +ZI) ; all other sections } } Tasks • Creating root execution regions on page 8-14 • Using the FIXED attribute to create root regions on page 8-17. Concepts • What is a root region? on page 8-13 • About placing ARM C and C++ library code on page 8-47 • Example of placing ARM C library code on page 8-49 • Example of placing ARM C++ library code on page 8-50. ARM DUI 0474C Copyright © 2010-2011 ARM. All rights reserved. 8-48 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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Page 129 and 130: Using scatter files • Images with
Page 131 and 132: 8.2 When to use scatter-loading 8.2
Page 133 and 134: • --startup=symbol, --no_startup
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Page 137 and 138: 8.5.1 See also } SRAM 0x8000 0x8000
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Page 141 and 142: 8.9 Creating root execution regions
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Page 149 and 150: Using scatter files • Using __at
Page 151 and 152: Developing Software for ARM ® Proc
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Page 155 and 156: 8.14 Examples of using placement al
Page 157 and 158: Using scatter files 8.15 Example of
Page 159 and 160: 8.16 Examples of using sorting algo
Page 161 and 162: 8.17 Selecting veneer input section
Page 163 and 164: Compiler Reference: • __attribute
Page 165 and 166: 8.20 Restrictions on placing __at s
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Page 169 and 170: 8.23 Placing a key in flash memory
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Page 179 and 180: 8.31 Reserving an empty region Usin
Page 181 and 182: 8.32 About creating regions on page
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Page 185 and 186: 8.35 Expression evaluation in scatt
Page 187 and 188: 8.37 Equivalent scatter-loading des
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Page 193 and 194: Using scatter files • The ER_ZI e
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10.10 Linker options for SysV model
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BPABI and SysV shared libraries and
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10.13 Addressing modes in the SysV
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10.17 Linker options for bare metal
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10.21 Addressing modes in the BPABI
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10.23 About symbol versioning 10.23
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10.25 Example of creating versioned
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10.27 Linker options for enabling i
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Chapter 11 Features of the Base Pla
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Features of the Base Platform linki
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11.2 Example scatter file for the B
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Features of the Base Platform linki
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Change Topics affected Revisions fo
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