Incorrect address after link

[Leon Pollak]

Thanks, Cedric.
	You are right - it does correctly. 
	But why it loads the crtl register with the value AT the address instead of 
the address itself (which IS CORRECT!)? This is the question.


On Tuesday 02 September 2003 18:03, you wrote:
> Hi
>
> I don't really understand your problem but
> 0x9421ffe0 should be the content of the
> address memory block (the 0x34330).
> Look at the addr 0x34330 you should
> see the 0x9421ffe0.
>
> To my mind lwz r11,17200(r11) should load in R11
> the content of (0x17200 + r11).
>
> The asm code do correctly what you said.






> > -----Original Message-----
> > From: Leon Pollak [mailto:leonp at plris.com]
> > Sent: Tuesday, September 02, 2003 4:36 PM
> > To: rtems-users
> > Subject: Incorrect address after link
> >
> >
> > Hello,
> > 	I finally have my new tool suit running and can
>
> debug the
>
> > BSP via bdm on my
> > MPC860 board.
> > 	The problem occurs when the printk function tries
>
> to call
>
> > my BSP_output_char
> > via vprintk.
> > 	Below is the assembler of the call:
> >
> >     0x17a14 <vprintk+1056>:	lis	r11,3
> >
> > R11=0x30000
> >     0x17a18 <vprintk+1060>:	lwz	r9,8(r31)
> >     0x17a1c <vprintk+1064>:	lbz	r0,0(r9)
> >     0x17a20 <vprintk+1068>:	clrlwi	r0,r0,24
> >     0x17a24 <vprintk+1072>:	lwz	r11,17200(r11)
> >
> > R11=0x9421ffe0 ?????
> >     0x17a28 <vprintk+1076>:	mtctr	r11
> >     0x17a2c <vprintk+1080>:	mr	r3,r0
> >     0x17a30 <vprintk+1084>:	bctrl
> >
> > 	When I follow the execution, I see that R11 in the
>
> line at
>
> > 0x17a24 is
> > calculated as 0x9421ffe0, while the function resides
>
> at 0x34330
>
> > according to
> > the map of linker. And 0x30000+17200=0x34330 - the
>
> correct address!!!
>
> > 	It seems to be some problem of linker (call
>
> convention?),
>
> > but I am not
> > experienced enough to guess.
> >
> > Any help will be very highly appreciated...
> >
> > --
> > leonp at plris dot com
>
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-- 
Dr.Leon M.Pollak
Director
PLR Information Systems Ltd.
leonp at plris dot com