The linker defines some symbols that are reserved by ARM, and that you can access if required.
The linker defines some symbols that contain the character sequence
These symbols, and all other external names containing the sequence
names reserved by ARM.
You can import these symbolic addresses and use them as relocatable addresses by your
assembly language programs, or refer to them as
from your C or C++ source code.
Be aware that:
If you use the
--strictcompiler command-line option, the compiler does not accept symbol names containing dollar symbols. To re-enable support, include the
--dollaroption on the compiler command line.
Linker-defined symbols are only generated when your code references them.
If execute-only (XO) sections are present, linker-defined symbols are defined with the following constraints:
XO linker defined symbols cannot be defined with respect to an empty region or a region that has no XO sections.
XO linker defined symbols cannot be defined with respect to a region that contains only RO sections.
RO linker defined symbols cannot be defined with respect to a region that contains only XO sections.