I will try with the 2.4 kernel. I'm a little new to this - where can I get a downloadable the 2.4 kernel image for the M68K ? I've looked at the debian and linux-68k websites and cannot find any links for downloading a kernel image. I would definitely be interested in knowing the workaround to get the correct mcontext as that is essential for my application too.
Thanks and Regards, Harish -----Original Message----- From: Richard Zidlicky [mailto:[EMAIL PROTECTED] Sent: Tuesday, July 06, 2004 5:21 PM To: Harishchandra Rao Tiruvuri (WT01 - TELECOM & INTER-NETWORKING SOLUTIONS) Cc: [email protected] Subject: Re: siginfo_t structure is not filled in the signal handler On Tue, Jul 06, 2004 at 04:25:03PM +0530, [EMAIL PROTECTED] wrote: > Hello, > > > > I am working on a Motorola VME 167 card with a 68040 processor. > The card is running debian linux 2.2 (kernel 2.2.10). The application I > am developing needs to handle signals and needs to know the cause of the > signal. For example, if the application executes a divide by zero > instruction then it should know in the signal handler if this was the > cause. > > For this the application checks the value of 'siginfo_t->si_code' passed > to the signal handler. However, this value seems to always zero. Siginfo does not work at all for 2.2 kernels, 2.4 and later should be fine. I am not sure if si_code is very meaningfull, signr which is also available to the handler should be preferred where possible. If you really need to use si_code you probably want to check kernel source to make sure it does what you think (me thinks arch/m68k/kernel/traps.c). > printf("D0 = %x\n", scp->uc_mcontext.gregs[R_D0]); note that the definition of uc_mcontext in some versions of glibc is incompatible to the def the kernel uses. I have a workaround to get correct mcontext values if you need it. Richard
