Phillipe, I will surely look into this, so far local_irq_enable/disable i.e unstall and stall routines did not cause problem in my assembly code. But I was facing this particular system call issue due to use of stack as arguments to the __ipipe_syscall_root and also in my case the venilla kernel is using the same register for syscall number and return value, during this case when Iam trying to save intial system call number on stack and once __ipipe_syscall_root is done I am reading it back, this may be corrupting stack, so I think I need to put more effort to resolve this and oragnize it. BTW phillipe at this stage can I go testing timer interrupts using by other domain, which registers as priority domain than linux ?
Regards Subbu On 1/17/07, Philippe Gerum <[EMAIL PROTECTED]> wrote:
On Wed, 2007-01-17 at 16:23 +0530, Subramani Venkatesh wrote: > Hello Philippe, > I would like to thank you once again for the HINT. > Now I avoided changes to system call calling __ipipe_syscall_root from > my assembly code and tested the same, well it not giving any errors as > sent you yesterday, this concludes there is a problem in a way of > calling __ipipe_syscall_root, I guess my stack is getting corrupted, i > will make sure my stack is saved before calling __ipipe_syscall_root > and resolve the issues. You should also check whether substituting inline code from asmmacro.h like local_irq_enable/disable with the I-pipe stall/unstall calls had any bad side-effect on the register set. Maybe t0 is not the only register affected by such operations anymore. > I thank you once again. > > Cheers > Subbu > > On 1/16/07, Philippe Gerum <[EMAIL PROTECTED]> wrote: > On Tue, 2007-01-16 at 15:49 +0530, Subramani Venkatesh wrote: > > Hello All, > > I am currently porting Adeos-ipipe on one of my MIPS > architecture. I > > am using I-Pipe 1.5-01, X86 as reference to my porting. So > Far I did > > relevant changes in > > 1.Interrupts handlers > > 2. System calls > > 3. Pagefault Handler > > Except Exception handling, I mean critcial bug events. > > With this changes I am able to Boot Linux kernel and also > able to > > mount Ramdisk successfully. > > > > [...] > > > Opening console is successfull and executing /sbin/init > > Algorithmics/MIPS FPU Emulator v1.5 > > INIT: version 2.85 booting > > grep: error while loading shared libraries: libc.so.6: > failed to map > > segment from shared object: Error 4090 > > There is likely something fishy in the syscall interception > path from > arch/mips/kernel/entry.S; all the syscalls seem to return > error values > mistakenly once the pipelining is in effect. You may want to > check your > changes in this area. > > Btw, it would be nice to work in an open manner and post your > code on > this list if you want to ask for help about it here. > Contribution has to > work both ways. TIA, > > -- > Philippe. > > > -- Philippe.
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