On 11 July 2010 18:58, Gabor Kovesdan <ga...@freebsd.org> wrote: > Em 2010.07.11. 16:54, Dimitry Andric escreveu: >> >> On 2010-07-11 16:46, Gabor Kovesdan wrote: >> >>> >>> I have two int64_t variables in kernel code, first is stored internally >>> and the second one is passed from a syscall argument. When I print them >>> with printf %lld modifier, the internal one behaves correctly but the >>> other one I pass from a syscall has a corrupted value. If I pass 1, it >>> prints out 3735348794091372545. I'm not doing anything special with it >>> just reading it out from the struct that was generated with make sysent. >>> >> >> Since 3735348794091372545 is 0x33d69ff000000001, it looks like the upper >> word got corrupted somehow. Maybe some part of it got non-atomically >> assigned? Maybe the wrong word was read? It is hard to tell without >> code... :) >> > > Userland syscall calling: > > killjob(getjid(), SIGINT); //getjid() returns 1 this case, whose type is > jid_t >
Looking at getjid() impl, I see you're trying to put jid_t into the one register_t which are 64-bit vs 32-bit capable respectively. You need to cast so you put 64-bit into two 32-bit as done for e.g. lseek(). -- wbr, pluknet _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
