Hi,
I'm trying to use the UNION linker statement to overlay two sections of code running in RAML0. I'm using CGT v. 5.2.7. The required code for copying from FLASH to RAM is working. But there is something strange...
Here is the relevant section of the .cmd-file:
CodeInRam : LOAD = FLASHA, PAGE = 0,
LOAD_START(_CodeInRam_LoadStart),
LOAD_END(_CodeInRam_LoadEnd)
ramfuncs : LOAD = FLASHA, PAGE = 0,
LOAD_START(_RamfuncsLoadStart),
LOAD_END(_RamfuncsLoadEnd)
UNION: RUN = RAML0, PAGE = 0
{
CodeInRam: RUN_START(_CodeInRam_RunStart)
ramfuncs: RUN_START(_RamfuncsRunStart)
}
And here are some cutouts from the .map file:
MEMORY CONFIGURATION
name origin length used unused attr fill
PAGE 0:
RAML0 00008000 00001000 00000000 00001000 RWIX
SECTION ALLOCATION MAP
section page origin length input sections
-------- ---- ---------- ---------- ----------------
CodeInRam
* 0 00008000 00000000 UNINITIALIZED
ramfuncs 0 00008000 00000000 UNINITIALIZED
GLOBAL SYMBOLS: SORTED ALPHABETICALLY BY Name
003f6bfc _CodeInRam_LoadEnd
003f6a95 _CodeInRam_LoadStart
00008000 _CodeInRam_RunStart
003f6d95 _RamfuncsLoadEnd
003f6c74 _RamfuncsLoadStart
00008000 _RamfuncsRunStart
This overlaying actually works, the code runs as expected, however the .map file indicates that no RAML0 is used by the UNION (yellow). This seems wrong !?
And if I add another segment to RAML0 outside the UNION that ends up overlapping the UNION, and the code does NOT run anymore. Even more wrong.
Am I using the UNION statement in a wrong way, or is there a linker bug here? I would be thankful if anyone would indicate how I could change the .cmd file to make this work.
st
