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Re: implications of placing vectors section after the text section.
- From: keshava <gc_keshava at yahoo dot com>
- To: eCos Discussion <ecos-discuss at ecos dot sourceware dot org>
- Date: Wed, 14 Sep 2005 23:26:09 -0700 (PDT)
- Subject: Re: [ECOS] implications of placing vectors section after the text section.
--- Gary Thomas <gary@mlbassoc.com> wrote:
> On Wed, 2005-09-14 at 08:44 -0700, keshava wrote:
> > Hello,
> >
> > I currently have this RAM_STARTUP type memory map
> on a
> > leon cyclone platfrom ....
> >
> > SECTION_vectors (ram,0x01000000, LMA_EQ_VMA)
> > SECTION_text (ram, ALIGN (0x4), LMA_EQ_VMA)
> > SECTION_fini (ram, ALIGN (0x4), LMA_EQ_VMA)
> > SECTION_rodata (ram, ALIGN (0x4), LMA_EQ_VMA)
> > SECTION_rodata1 (ram, ALIGN (0x4), LMA_EQ_VMA)
> > SECTION_fixup (ram, ALIGN (0x4), LMA_EQ_VMA)
> > SECTION_gcc_except_table (ram, ALIGN (0x4),
> > LMA_EQ_VMA)
> > SECTION_data (ram, ALIGN (0x04), LMA_EQ_VMA)
> > SECTION_bss (ram, ALIGN (0x8), LMA_EQ_VMA)
> >
> > I want to know what are the potential implications
> if
> > i move the vectors section after the text
> > section.. if anybody has experiemented with this
> > configuration.. please let me know if there
> > are any potential side effects.
> > This is the configuration i want use...
> > SECTION_text (ram,0x01000000, LMA_EQ_VMA)
> > SECTION_vectors (ram, ALIGN (0x4), LMA_EQ_VMA)
>
> > SECTION_fini (ram, ALIGN (0x4), LMA_EQ_VMA)
> > SECTION_rodata (ram, ALIGN (0x4), LMA_EQ_VMA)
> > SECTION_rodata1 (ram, ALIGN (0x4), LMA_EQ_VMA)
> > SECTION_fixup (ram, ALIGN (0x4), LMA_EQ_VMA)
> > SECTION_gcc_except_table (ram, ALIGN (0x4),
> > LMA_EQ_VMA)
> > SECTION_data (ram, ALIGN (0x04), LMA_EQ_VMA)
> > SECTION_bss (ram, ALIGN (0x8), LMA_EQ_VMA)
>
> What architecture/platform is this for? Why do you
> want
> to do this?
>
> n.b. the potential side effects are [most probably]
> your
> eCos application will not work :-(
>
Hi Gary,
This is for a sprac V8 based platform.. i've already
tried it out and it works fine :-).. i want to run the
image from RAM using DSUMon (similar to rom monitor)..
reason for doing this is, i want the entry_ponint to
be aligned with start of RAM..
-keshav
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