[ECOS] implications of placing vectors section after the text section.

Gary Thomas gary@mlbassoc.com
Thu Sep 15 06:26:00 GMT 2005


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 :-(

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------


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