From: Serguei Tzukanov <tzukanov@narod.ru> To: freebsd-platforms@freebsd.org Cc: freebsd-hackers@freebsd.org Subject: A question about S/390 port Message-ID: <200207101554.09734.tzukanov@narod.ru>
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Some working notes. I've written the libc/csu part, kernel successfully starts init and init forks off for the execve of -sh, (http://tzukanov.narod.ru/freebsd390/bootlog.txt) but there is problem with printing from userland, e.g. output from userland are not visible. Write syscall to descs 1,2 in init returns with success. I'm sure it's something very stupid, so maybe someone have a clue? And another problem (well-known?): __syscall returns 64-bit value but mmap returns 4-byte word in the td->td_retval[0]. Wrapper for mmap in libc casts 64 rv to 32 and alays gets zero. This leads to truncating to zero due to cast on 32-bit big-endian architectures. The solution is obvious - using constructs like td->td_retval[_QUAD_LOWWORD] = xxx in MI code. For now I just avoid it with hack in syscall handler. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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