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Date: Tue, 16 Jun 2009 17:41:00 -0000
Message-ID: <84ccfe8c0906161041i63be1577j6b34341cf548bcea@mail.gmail.com>
Subject: Re: AVR C++ - how to move vtables into FLASH memory
From: Denis Chertykov <chertykov@gmail.com>
To: Ian Lance Taylor <iant@google.com>
Cc: Tomasz Francuz <tfrancuz@mp.pl>, gcc@gcc.gnu.org
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2009/6/16 Ian Lance Taylor <iant@google.com>:
> Tomasz Francuz <tfrancuz@mp.pl> writes:
>
>> I would like to change gcc so AVR C++ port will use FLASH memory
>> instead of SRAM to store virtual function pointers. Does anyone try to
>> do it? I have no experience as gcc developer, so can you head me to
>> appropriate files/literature about this particular problem?
>
> This question would be more appropriate for the mailing list
> gcc-help@gcc.gnu.org than for gcc@gcc.gnu.org. =C2=A0Please take any
> followups to gcc-help. =C2=A0Thanks.
>
> Virtual tables will normally be placed in the .rodata section which
> holds read-only data. =C2=A0All you should need to do it arrange for the
> .rodata section to be placed in FLASH rather than SRAM. =C2=A0This would
> normally be done in your linker script.

No, no. movMODE insns for AVR don't support FLASH (PROGMEM), only SRAM.

Denis.