code.
- To achieve COMPAT_NETBSD32 compatibility, introduce a parameter to
kevent1 that points to functions that do the actual copyin/copyout
operations. This is similar to what was done in FreeBSD by Paul Saab.
- Add the COMPAT_NETBSD32 definitions and hooks.
discussed in the PR.
- introduce sys/timevar.h to hold kernel-specific stuff relevant to
sys/time.h. Ideally, timevar.h would contain all (or almost) of the
#ifdef _KERNEL part of time.h, but that's a pretty big and tedious
change to make. For now, it will contain only the prototypes I
introduced when working on COMPAT_NETBSD32.
- split copyinout_t into copyin_t and copyout_t, it makes prototypes more
explicit about the meaning of a given argument. Suggested by yamt@.
- move copyinout_t definition in sys/time.h to systm.h as copyin_t and
copyout_t
- make everything uses the new types and include the proper headers at
the proper places.
as an argument a function that will retrieve an element of the pointer
arrays in user space. This allows COMPAT_NETBSD32 to share the code for
the emulated version of execve(2), and fixes various issues that came from
the slow drift between the two implementations.
Note: when splitting up a syscall function, I'll use two different ways
of naming the resulting helper function. If it stills does
copyin/out operations, it will be named <syscall>1(). If it does
not (as it was the case for get/setitimer), it will be named
do<syscall>.
relevant code with the COMPAT_NETBSD32 version, and make the latter use
the new functions.
This fixes netbsd32_setitimer() which had drifted from the native syscall
and did not work properly anymore.
so, it introduces breakage because a lot of applications make assumptions
from its value. It's especially bad in the sparc64 case, where 64-bits
instructions can be used in 32-bits addressing mode. However, there are
other means to know the capabilities of the CPU.
