[Suzaku:00229] Re: Trouble adding OPB slave

[Yasushi SHOJI]

Hi Eike,

At Fri, 14 Jan 2005 12:52:13 +0900,
Eike Suthau wrote:
> 
> This program crashes (IP address):
> ================ hello.c ( not working ) ======================
> #include <stdio.h>
> #include "measif.h"
> 
> #define BASE 0xffffb000
> 
> //port in/out macro
> #define OUT(addr, data) *(volatile int *)(addr)=(unsigned long)data
> #define IN(addr) (unsigned long) *(volatile int*)(address)
> int main(int argc, char *argv[])
> {
>  unsigned long i,j;
>  while (1) { 
>  OUT(BASE,0);
>  }
>  return 0;
> }

I've compiled this code with out your core.  It seems to be the
produced program is running forever.  no crash at all.

using the toolchan from our site and on the default suzaku.  so, seems
like the code is fine.

here is disassembled code for main:

00000048 <main>:
  48:	3060b000 	addik	r3, r0, -20480
  4c:	d8001800 	sw	r0, r0, r3
  50:	b800fffc 	bri	-4		// 4c

could you tell me the optimization level you are using?  I'm using -O2
for now.  except for the address, it seems to be exactly the same.

> =====================================================
> 
> When I run the second program I get:
> # /tmp/hello
> debug trap
> r0:00000000     r1:80FC7F24     r2:80FC1114     r3:FFFFB008
> r4:80FC01A4     r5:00000001     r6:80FC7F80     r7:80FC7F88
> r8:00000000     r9:00005401     r10:00000001    r11:00000020
> r12:8003B588    r13:80FC1114    r14:80009FA0    r15:80FC017C
> r16:00000009    r17:80FC04D0    r18:FFFFFF82    r19:00000001
> r20:00000000    r21:00000000    r22:00000000    r23:8037FFAC
> r24:00000000    r25:80374EBC    r26:8037FFBE    r27:8034F82C
> r28:00000000    r29:8036EFE0    r30:8036B960    r31:00000FFF
> pc:80FC04D0     psw:00000020
> Trace/BPT trap
> #

when you get debug trap, you'll see this out put.  but not sure why
you get the debug trap.

Best regards,
--
           yashi