ARM Compiler toolchain Using the Linker - ARM Information Center

8.32 About creating regions on page boundaries
8.32.1 See also
Using scatter files
You can produce an ELF file that can be loaded directly to a target with each execution region
starting at a page boundary.
The linker provides the following built-in functions to help create load and execution regions
on page boundaries:
• AlignExpr
• GetPageSize.
Note
Alignment on an execution region causes both the load address and execution address to be
aligned.
The following example produces an ELF file with each execution region starting on a new page:
LR1 GetPageSize() + SizeOfHeaders()
{
ER_RO +0
{
*(+RO)
}
ER_RW +GetPageSize()
{
*(+RW)
}
ER_ZI +0
{
*(+ZI)
}
}
Example 8-21 Creating regions on page boundaries
The default page size 0x8000, is used. You can change the page size with the --pagesize
command-line option.
Concepts
• Demand paging on page 4-23
• Overalignment of execution regions and input sections on page 8-56
• Expression evaluation in scatter files on page 8-58
• Using expression evaluation in a scatter file to avoid padding on page 8-59.
Reference
Linker Reference:
• --pagesize=pagesize on page 2-118
• Load region attributes on page 4-7
• Execution region attributes on page 4-11
• Example of aligning a base address in execution space but still tightly packed in load
space on page 4-41
• AlignExpr(expr, align) function on page 4-42
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