In message <XFMail.20020529124710.jhb@FreeBSD.org>, John Baldwin writes:
>+ frame = td->td_frame;
>+ frame->tf_eax = retval; /* Child returns zero */
>+ frame->tf_edx = aux; /* I dunno */
>You could always ask about that instead of having a I dunno comment. :)
>I think that we no longer use 2 return values from syscalls for FreeBSD
>syscalls (I know we did for fork1() at one point, possibly still do
>so that 4.x libc works ok on 5.x kernel). Linux does depend on edx being
>preserved across a syscall though IIRC.
We do for 64bit returns like lseek(2)
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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