ARM Compiler toolchain Using the Linker - ARM Information Center

8.22 Manual placement of __at sections
8.22.1 See also
Using scatter files
You can use the standard section placement rules to place __at sections when using the
--no_autoat command-line option.
Note
You cannot use __at section placement with position independent execution regions.
The following example shows the placement of read-only sections .ARM.__at_0x2000 and the
read-write section .ARM.__at_0x4000. Load and execution regions are not created automatically
in manual mode. An error is produced if an __at section cannot be placed in an execution region.
Example 8-12 Manual placement of __at sections
LR1 0x0
{
ER_RO 0x0 0x2000
{
*(+RO) ; .ARM.__at_0x0 is selected by +RO
}
ER_RO2 0x2000
{
*(.ARM.__at_0x2000) ; .ARM.__at_0x2000 is selected by .ARM.__at_0x2000
}
ER2 0x4000
{
*(+RW +ZI) ; .ARM.__at_0x4000 is selected by +RW
}
}
Concepts
• Using __attribute__((section("name"))) on page 8-35
• Using __at sections to place sections at a specific address on page 8-37
• Restrictions on placing __at sections on page 8-38
• Automatic placement of __at sections on page 8-39
• Placing a key in flash memory using __at on page 8-42
• Placing a structure over a peripheral register using __at on page 8-43.
Linker Reference:
• About execution region descriptions on page 4-8.
Reference
Linker Reference:
• --autoat, --no_autoat on page 2-17
• Execution region attributes on page 4-11.
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