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Linker Reference Guide
Conventions and feedback
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Formal syntax of the scatter file
BNF notation used in scatter-loading description s
Syntax of a scatter file
About load region descriptions
Syntax of a load region description
Load region attributes
About execution region descriptions
Syntax of an execution region description
Execution region attributes
Address attributes for load and execution regions
Considerations when using a relative address +offs
Considerations when using a relative address +offs
Inheritance rules for load region address attribut
Inheritance rules for execution region address att
Inheritance rules for the RELOC address attribute
About input section descriptions
Syntax of an input section description
How the linker resolves multiple matches when proc
Behavior when .ANY sections overflow because of li
How the linker resolves path names when processing
About Expression evaluation in scatter files
Expression usage in scatter files
Expression rules in scatter files
Execution address built-in functions for use in sc
Scatter files containing relative base address loa
ScatterAssert function and load address related fu
Symbol related function in a scatter file
Example of aligning a base address in execution sp
AlignExpr(expr, align) function
GetPageSize() function
SizeOfHeaders() function
Linker Reference Guide
AlignExpr(expr, align) function
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| Home > Formal syntax of the scatter file > AlignExpr(expr, align) function | |||
This function returns:
(expr + (align-1)) & ~(align-1))
where:
expris a valid address expressionalignis the alignment, and must be a positive power of 2.
It increases expr until it is:
0 mod align
ExampleThis example aligns the address of ER2 on
an 8-byte boundary:
ER +0
{
...
}
ER2 AlignExpr(+0x8000,8)
{
...
}
The following relationship exists between ALIGN and AlignExpr:
ALIGNkeywordLoad and execution regions already have an
ALIGNkeyword:for load regions the
ALIGNkeyword aligns the base of the load region in load space and in the file to the specified alignmentfor execution regions the
ALIGNkeyword aligns the base of the execution region in execution and load space to the specified alignment.
AlignExprAligns the expression it operates on, but has no effect on the properties of the load or execution region.
- Reference
| Copyright © 2008, 2011-2012 ARM. All rights reserved. | ARM DUI 0458C |
| Non-Confidential | ID062912 |
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| Home > Formal syntax of the scatter file > AlignExpr(expr, align) function |
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