ARM Compiler toolchain Using the Linker - ARM Information Center

8.12 Placing a named section explicitly using scatter-loading
8.12.1 See also
Using scatter files
The following example shows how to place a named section explicitly using scatter-loading:
Example 8-7 Explicit section placement
LR1 0x0 0x10000
{
ER1 0x0 0x2000 ; Root Region, containing init code
{
init.o (INIT, +FIRST) ; place init code at exactly 0x0
*(+RO) ; rest of code and read-only data
}
RAM_RW 0x400000 (0x1FF00-0x2000) ; RW & ZI data to be placed at 0x400000
{
*(+RW)
}
RAM_ZI +0
{
*(+ZI)
}
DATABLOCK 0x1FF00 0xFF ; execution region at 0x1FF00
{ ; maximum space available for table is 0xFF
data.o(+RO-DATA) ; place RO data between 0x1FF00 and 0x1FFFF
}
}
In this example, the scatter-loading description places:
• The initialization code is placed in the INIT section in the init.o file. This example shows
that the code from the INIT section is placed first, at address 0x0, followed by the
remainder of the RO code and all of the RO data except for the RO data in the object
data.o.
• All global RW variables in RAM at 0x400000.
• A table of RO-DATA from data.o at address 0x1FF00.
Tasks
• Using the FIXED attribute to create root regions on page 8-17.
Concepts
Linker Reference:
• About load region descriptions on page 4-5
• About execution region descriptions on page 4-8.
Reference
Linker Reference:
• Load region attributes on page 4-7
• Execution region attributes on page 4-11
• Address attributes for load and execution regions on page 4-14.
Assembler Reference:
• ENTRY on page 6-65.
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