The ioctl definitions and accompanying structures were
taken from FreeBSD's soundcard.h, hopefully providing
some binary compatibility.
The ioctls are as follows:
SNDCTL_SYSINFO: Returns a structure containing
details about the audio device.
SNDCTL_ENGINEINFO - SNDCTL_AUDIOINFO: Returns a
structure with playback/recording
characteristics.
SNDCTL_DSP_GETPLAYVOL, SNDCTL_DSP_SETPLAYVOL,
SNDCTL_DSP_GETRECVOL, SNDCTL_DSP_SETRECVOL:
Retrieves/Sets Playback/Recording volume.
SNDCTL_DSP_SKIP - SNDCTL_DSP_SILENCE: These ioctls
were intended to manipulate the underlying
audio buffer skip or insert silence. These
return EINVAL.
SOUND_VERSION is unchanged, but is definable, It will be
changed when the mixer OSSv4 ioctls are written.
Addresses PR 46611
This commit was approved by wiz@.
This results in some duplicate logic in the creation vnops (symlink,
mknod, create, mkdir) but we will probably be able to factor it out in
a more sensible way later.
Now the creation vnops call getnewvnode explicitly instead of under
multiple layers of obscure gunk. Then we explicitly do lfs_set_dirop,
and afterwards lfs_unset_dirop.
trace_enter()/trace_exit() calls.
This fix some cases where tracing show unexpected SYSRET number value
because some syscalls, such as setcontext(2), modified the trapframe
register values.
(ucode) available, and the pal interface does not provide additional
details either. Hardcode the si_code value to FPE_INTDIV, since the only
callers of gentrap in our kernel seem to be the division routines in libkern.
- Remove PCU_KERNEL (hi matt!) and significantly simplify the code.
This experimental feature was tried on ARM did not meet the expectations.
It may be revived one day, but it should be done in a much simpler way.
- Add a message structure for xcall function, pass the LWP ower and thus
optimise a race condition: if LWP is discarding its state on a remote CPU,
but another LWP already did it - do not cause an unecessary re-faulting.
- Reduce the variety of flags for PCU operations (only PCU_VALID and
PCU_REENABLE are used now), pass them only to the pcu_state_load().
- Rename pcu_used_p() to pcu_valid_p(); hopefully it is less confusing.
- pcu_save_all_on_cpu: SPL ought to be used here.
- Update and improve the pcu(9) man page; it needs wizd(8) though.
- Implement Array Bounds Check Elimination for packet bytes.
- Track initialization of registers and memwords.
- Remove "bj_" prefix from struct members.
- Shorten "BPFJIT_" prefix to "BJ_".
- Other small improvements.
