Petr Vandrovec wrote:
Dave Jiang wrote:
Andi Kleen wrote:
Dave Jiang <[email protected]> writes:
Am I doing something wrong, or is this intended to be this way on
x86_64, or is something incorrect in the kernel? This method works
fine on i386. Thanks for any help!
I just tested your program on SLES9 with updated kernel and RBP
looks correct to me. Probably something is wrong with your user space
includes or your compiler.
-Andi
I revised the app a little so that it would allow the threads to
start, thus should prevent rBP w/ all 0's showing up. Below are some
of results that I've gotten from various different distros and
platforms. As you can see, the f's shows up on most of them, including
Suse 9.2. The only one showed up looking ok is the Mandrake/Mandriva
distro. I'm not sure how different SLES9 is from Suse9.2....
Replace call to sleep() with busy loop. Glibc's sleep() uses %ebp for
its own data, so when you interrupt sleep(), you get rbp=(unsigned int)-1,
as rbp really contains 0x0000.0000.ffff.ffff when nanosleep() syscall
is issued.
Petr
From what I understand, when you signal a thread, the signal handler
executes in the thread context and not the main process context. So
therefore the rbp would be the thread's copy and not the one that
sleep() just modified. So whatever sleep does to the main process
context, there shouldn't be any effect on the thread context.... Also,
what can I call to allow the threads to run? sleep() allows me to run
the other threads. Busy wait does not.....
--
Dave
------------------------------------------------------
Dave Jiang
Software Engineer Phone: (480) 517-0372
MontaVista Software, Inc. Fax: (480) 517-0262
2141 E Broadway Rd, St 108 Web: www.mvista.com
Tempe, AZ 85282 mailto:[email protected]
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