[ECOS] memory map question

[Gary Thomas]

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It looks like MLT (ConfigTool) didn't setup your .ldi file correctly.

On 24-Aug-2001 Simpkins, Andy wrote:
> 
> 
>> -----Original Message-----
>> From: Gary Thomas [ mailto:gthomas@redhat.com ]
>> Sent: 24 August 2001 15:16
>> To: Simpkins, Andy
>> Cc: ecos-discuss@sourceware.cygnus.com
>> Subject: RE: [ECOS] memory map question
>> 
>> 
>> 
>> On 24-Aug-2001 Simpkins, Andy wrote:
>> > Hi there,
>> > 
>> > I am trying to map some data to a specific address in FLASH 
>> on my custom
>> > target board (ARM7TDMI core)
>> > 
>> > The data is defined as 
>> > 
>> > unsigned char globalArchive[] __attribute__ ((section 
>> (".ivoryDataStore")))
>> > =
>> >    {0x04, 0x18, 0x00, 0x00, 0x81);
>> > 
>> > 
>> > I have added the following to arm.ld 
>> > 
>> >#define SECTION_ivoryDataStore(_region_, _vma_, _lma_) \
>> >     .ivoryDataStore _vma_ : _lma_ \
>> >     { FORCE_OUTPUT; *(.ivoryDataStore) } \
>> >     > _region_
>> > 
>> > And have attempted to define ivoryDataStore in my memory 
>> map of the config
>> > tool (1.3.1)
>> > I kind of hoped that the name would have shown up in the 
>> drop down box for
>> > Linker-defined, as it didn't I had to specify it as user defined...
>> > 
>> > i.e. 
>> >       Name - User-defined: ivoryDataStore
>> >            - Known Size: 0x2000
>> >       Final Location (VMA) - Absolute: 0xe0000
>> > 
>> > however when I compile my code I get the following :
>> > 
>> > 
>> > arm-elf-gcc *.o ../../API/*/*.o -L /i/eCOSbuilds/a166_install/lib/
>> > -Ttarget.ld -nostdlib -Xlinker -Map -Xlinker mapfile.txt
>> > /tools/H-i686-pc-cygwin/arm-elf/bin/ld: warning: no memory 
>> region specified
>> > for
>> > section `.ivoryDataStore'
>> 
>> Does .ivoryDataStore end up in your "target.ld" file (the 
>> linker script)?  If
>> not, it's a problem with the macros & sections.
>> 
> 
> not quite, I get 
> 
> __ivoryDataStore = 0xe0000; . = __ivoryDataStore + 0x20000;
> 
> where as the items that apper in the eCos config tool as 'linker defined'
> look like
> 
> .rodata   ALIGN (0x4)  :      { . = . ; *(.rodata*) } >  rom
> 
> I assumed that this is because the code is at an absolute address, however I
> can not understand why I get a doubble underscore at the start instead of a
> period...
> 
> 
> Andy