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Re: System crashes when executed from ROM
- To: ecos-discuss at sourceware dot cygnus dot com
- Subject: Re: [ECOS] System crashes when executed from ROM
- From: Chandrasekhar G <chandrag at danlawinc dot com>
- Date: Thu, 19 Oct 2000 22:05:58 +0700
- Organization: DTIL
- References: <39EF2FCA.9E619E8B@redhat.com>
- Reply-To: chandrag at danlawinc dot com
The configuration option currently is CYG_HAL_SARTUP_ROM. We executed the test
program tm_basic and some other small programs from ROM. We made a small
change in the routine. Before the control reaches the infinite loop we read a
port. If its value is 1 we execute code RAM, other wise jump to a location in
ROM. From there the execution starts. The program gets a Trap signal when it
try to enter the routine and it takes control.
On Fri, 20 Oct 2000, you wrote:
> Chandrasekhar G wrote:
> >
> > Hi,
> >
> > We are trying to execute an application from ROM. It works perfectly from
> > RAM. But with ROM it crashes on entering certain routines. The routines do
> > some IO on serial port using cyg_io_read and cyg_io_write and sprintf and
> > sscanf functions. Can anybody suggest possible
> > reasons for this beheavior?
>
> Just to check: you are changing the startup type (i.e. the config option
> CYG_HAL_STARTUP) from RAM to ROM and not just programming the same
> application into ROM, aren't you? :-).
>
> Other than that, no idea. Does it actually manage to call sprintf/sscanf or
> cyg_io_read/write? I presume you mean it crashes, i.e. hangs? Are there any
> relevant differences in your configuration? Have you tried using just a
> very simple test application?
>
> Jifl
> --
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