How _Far_Rts Is Defined In Linkage.h With -Mr; Header File Details - Texas Instruments TMS320C6000 Programmer's Manual

4.2.6

Header File Details

Table 4–3. How _FAR_RTS is Defined in Linkage.h With –mr
4.2.7 Changing RTS Data to near
Refer to section 4.4.1 to learn about the linker error messages when calls go
beyond the PC relative boundary.
Look at the file linkage.h in the include directory of the release. Depending on
the value of the _FAR_RTS macro, the macro _CODE_ACCESS is set to force
calls to RTS functions to be either user default, near, or far. The _FAR_RTS
macro is set according to the use of the –mr n switch.
Option Internal RTS calls
Default Same as user
–mr0 Near
–mr1 Far
The _DATA_ACCESS macro is set to always be far.
The _IDECL macro determines how inline functions are declared.
All of the RTS header files which define functions or data include linkage.h
header file. Functions are modified with _CODE_ACCESS:
extern _CODE_ACCESS void
and data is modified with _DATA_ACCESS:
extern _DATA_ACCESS unsigned char _ctypes_[];
If for some reason you do not want accesses of RTS data to use the far access
method, take these steps:
Go to the include directory of the release.
Edit linkage.h, and change the:
#define _DATA_ACCESS far
macro to
#define _DATA_ACCESS near
to force all access of RTS data to use near access, or
change it to
#define _DATA_ACCESS
How to Save On-Chip Memory by Placing RTS Off-Chip
Normal RTS calls
Same as user
Near
Far
exit(int _status);
_FAR_RTS
Undefined
0
1
Linking Issues 4-11