The following changes to armlink have been made:
- GNU ld script support enhancements
The linker now supports the GNU ld script keywords
ABSOLUTE,ADDR,ALIGNOF,DEFINED,EXTERN,LOADADDR, andSIZEOF.The default ld scripts for executable and shared objects align to 4 bytes after
.bssregion.The
--sysrootcommand-line option is supported.- String merging enhancements
The linker can merge strings where the address is generated by
MOVTandMOVWinstructions.- 64-bit linker
A 64-bit version of armlink is provided that can utilize the greater amount of memory available to processes on 64-bit operating systems. It supports all the features that are supported by the 32-bit version of armlink in this release.
Note
The 32-bit version of armlink is the default even on 64-bit operating systems. You must manually set up your installation environment if you want to use the 64-bit version.
- Placing and sorting input sections
Additional command-line options are available to control the placement and the sort order of input sections when using the
.ANYmodule selector:--any_contingency--any_placement=algorithm--any_sort_order=.order
The
--info=anyoption is provided to show details of the sorting and placement of.ANYsections.- Using a tiebreaker when sorting input sections with equal properties
In ARM Compiler v4.1 and earlier, the sorting algorithm used by the linker is based on the order that the linker creates sections in its section data structure.
In ARM Compiler v4.1 SP1 and later, an additional sorting algorithm is available based on the order that sections appear on the linker command-line.
You select the algorithm using the
--tiebreakercommand-line option. For backwards compatibility, the section create order is the default.The
--section_index_display=cmdlineoption is provided to show the sections in the memory map output in the same order they appear on the command-line.- Controlling veneer sharing across execution regions
The
--[no_]crosser_veneersharecommand-line option is available to enable and disable veneer sharing across execution regions.- Linker-defined symbols
The linker now supports the following linker-defined symbols:
Load$$
region_name$$ZI$$BaseLoad$$region_name$$ZI$$LimitLoad$$region_name$$ZI$$Length- Additional command-line options supported
The following command-line options have been added:
--emit_non_debug_relocs--[no_]load_addr_map_info--[no_]strict_flags--[no_]strict_symbols--[no_]strict_visibility--veneer_inject_type--veneer_pool_size.
- Changes to command-line options
The following changes have been made to existing command-line options:
the
anyandveneerpoolstopics have been added to--infothe
cmdlinetype has been added to--section_index_displaythe
Alignment,BreadthFirstCallTreeandLexicalStatealgorithms have been added to--sort
- Changes to scatter files
The following changes have been made to scatter files:
+can be used in a conditional operatoroffsetexecution address built-in functions can now be used for the
max_size
See also- Tasks
Introducing the ARM Compiler toolchain:
- Concepts
Introducing the ARM Compiler toolchain:
Using the Linker:
Linker Reference:
- Reference
Using the Linker:
Linker Reference:
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