ARM Compiler toolchain Using the Linker - ARM Information Center

Using scatter files
8.15 Example of next_fit algorithm showing behavior of full regions, selectors, and
priority
This example shows the operation of the next_fit placement algorithm for RO-CODE sections in
sections.o.
The input section properties and ordering are shown in the following table:
The scatter file used for the examples is:
LR 0x100
{
ER_1 0x100 0x20
{
.ANY1(+RO-CODE)
}
ER_2 0x200 0x20
{
.ANY2(+RO)
}
ER_3 0x300 0x20
{
.ANY3(+RO)
}
}
Note
This example has --any_contingency disabled.
The next_fit algorithm is different to the others in that it never revisits a region that is
considered to be full. This example also shows the interaction between priority and specificity
of selectors - this is the same for all the algorithms.
Execution Region ER_1 (Base: 0x00000100, Size: 0x00000014, Max: 0x00000020, ABSOLUTE)
Base Addr Size Type Attr Idx E Section Name Object
0x00000100 0x00000014 Code RO 1 sec1 sections.o
Execution Region ER_2 (Base: 0x00000200, Size: 0x0000001c, Max: 0x00000020, ABSOLUTE)
Base Addr Size Type Attr Idx E Section Name Object
Table 8-2 Input section properties
Name Size
sec1 0x4
sec2 0x4
sec3 0x4
sec4 0x4
sec5 0x4
sec6 0x4
ARM DUI 0474C Copyright © 2010-2011 ARM. All rights reserved. 8-30
ID080411 Non-Confidential