- The kernel version has been bumped to 0.9.0
- The timer resolution in the kernel has been increased to millseconds.
- The preemptive scheduling interval has been descreased to one
millisecond.
- Relative sleep continues to use 10 millsecond intervals for legacy
reasons.
- `gettimeofday` now uses the internal tick counter to calculate the
current time. Drift is calculated from the CMOS every 5 seconds and
applies only to `gettimeofday` and other places that use it.
- The resolution of timing information provided by debug functions has
been increased to three digits (milliseconds).
- The resolution of timing information provided by the procfs uptime
virtual file has been increased to three digits (milliseconds).
- Functions have been added to the debug shell to read the TSC. The TSC
is not used in timing functions at this time.
There's a lot here, so let's through it:
- Lots of work to include a symbol table in the kernel. We can't rely on
our bootloader to give us our own ELF information, so we do this
separately. This probably should be changed to output a C source
rather than assembly, but that's a TODO.
- Makefile can now generate modules. It works basically the same way any
other kernel object works, expect with a slightly different linking
scheme.
- Commands have been added to the debug shell to load modules, but they
don't work yet - still need to get through relocation and linking.
- Commands have been added to the debug shell to print the symbol list,
as well as print symbol values (but note that printing symbol values
is kinda dangerous if you don't know what they are, so don't just go
printing things willy-nilly).
... handling any interrupt service routines.
This was causing crashes while running /userspace/ apps without any
syscalls being triggered, presumably due to switching at awkward times.
