In article <200302071843.09517.mlist@beholder.homeunix.net>
mlist@beholder.homeunix.net wrote:

> panic: tlb_handler: invalid user-space access from kernel mode
> va=0x00000000 ssr=0x400000f0 lwp=0x8c832794 onfault=0x0c0ecefa

This is a known problem. It seems a bug around signal trampoline,
but I cannot track it yet.

You can reproduce the panic by the following way:

1) Build pkgsrc/devel/pth on pre-1.6M (pre-nathanw_sa) userland
   (i.e. build pth without [gs]etcontext support)

2) Prepare a program used by "checking whether
   pthread_mutex_trylock is posix like" test:
---
#include <pthread.h>
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
int main () { 
	return !pthread_mutex_trylock (&mutex);
}
---
   and build it:
> cc -O -I/usr/pkg/include -c -o test.o test.c
> cc -o test test.o /usr/pkg/lib/libpthread.a
> ./test

---
Izumi Tsutsui
tsutsui@ceres.dti.ne.jp