This is the mail archive of the ecos-discuss@sources.redhat.com mailing list for the eCos project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Question about fixed vector table(ARM).


>>>>> HuangQiang  writes:

> why can't we just use(for example for IRQ):

> 0x18  ldr pc, .IRQ      ; Can this jump to anywhere in the address
> space(32-bit)?

No. This is more limiting than a branch instruction. .IRQ has to
be within a 12bit offset of the PC for this instruction to work.

--Mark

-- 
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]