I suspect Guy Harris (guy@auspex.com) could answer this.  Guy?

: setjmp() on the sparc uses a sigaltstack(2) system call which is not
: implemented causing several interesting programs to drop core.
: 
: I tried one based on the info in `libc/arch/sparc/gen/setjmp.s' and <sys/signal.h>
: but it is (can not be) complete: the stack location and `onstack' indicator
: are taken from the process' user area, but the field `sa_len' is set to zero.
: 
: On the other hand, why use sigaltstack(2) in setjmp.s where sigstack(2)
: would do just as well?
: 
: -pk

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