hi, The value of r0 is 0 just before the execution of <start+52>. The abort data exception tells that the address where it can't read is 0xE59FF018 wich is a reserved address.
For the stack I have no idea. I will change the stack value and see if it is making it work. thanks JD 2008/1/24, Andrew Lunn <[EMAIL PROTECTED]>: > On Thu, Jan 24, 2008 at 03:38:14PM -0800, Jean-David Vuillemain wrote: > > hi, > > > > i have been working with ecos for a couple of months now. I had no > > problem at all with a 8 months old repository source files and my own > > port for my target board. After some problem with my working > > environment and updating the ecos source files, i can't have my old > > work and my new code running on the board. > > It seems that my code always go through the same steps and finishes by > > an exception abort data. > > > > Here is the code where it fails: > > 0x80020070 <start>: ldr r0, [pc, #1020] ; 0x80020474 <.init_flag> > > 0x80020074 <start+4>: ldr r1, [r0] > > 0x80020078 <start+8>: cmp r1, #0 ; 0x0 > > 0x8002007c <start+12>: bne 0x80020078 <start+8> > > 0x80020080 <start+16>: ldr r1, [pc, #196] ; 0x8002014c <init_done> > > 0x80020084 <start+20>: str r1, [r0] > > 0x80020088 <start+24>: mov r0, #0 ; 0x0 > > 0x8002008c <start+28>: ldr r1, [pc, #988] ; 0x80020470 > > <.__exception_handlers> > > 0x80020090 <start+32>: cmp r7, #19 ; 0x13 > > 0x80020094 <start+36>: beq 0x800200a0 <start+48> > > 0x80020098 <start+40>: ldr r2, [r1, #40] > > 0x8002009c <start+44>: str r2, [r0, #40] > > 0x800200a0 <start+48>: ldr r2, [r1, #24] > > 0x800200a4 <start+52>: str r2, [r0, #24] <-- this line fails on my > > old and new programs > > It ends up in an abort data: > > 0x00000010 swp r1, r3, [r2] > > What is the value of r0? You should be able to look at the exception > bank of registers and see a value. Is it legal, does RAM/FLASH/IO > exist there etc. > > The fact you are in exception handlers is not good anything. It > suggests something else has gone wrong. Have you checked your stacks > are big enough. It seems like 75% of random crashes are stack > overflows. > > Andrew > -- Jean-David Vuillemain [EMAIL PROTECTED] -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
