- note chip restictions on interrupt in the kernel config
- allocate interrupts at attach time
- track per CPU interrupts
- remove a funciton written in assembly
as user faults.
Based heavily in the i386 code with the correct opcode bytes inserted.
iret path tested, arranging for segment register errors is harder.
User %fs and %gs (32bit apps) are loaded much earlier and any errors
will generate kernel panics - there is probably code to try to stop
the invalid values being set.
to userspace, we must do a 'swapgs' to reload the kernel %gs_base.
Also save the %ds, %es, %fs, %gs selector values in the frame so
they can be restored if we finally return to user (probably after
an application SIGSEGV handler has fixed the error).
Without this any such fault leaves the kernel running with the wrong
%gs offset and it will most likely fault again early in trap().
Repeats until the stack tramples on something important.
iret change works, invalid %gs is a little harder to arrange.
in Timer-D. It fixes the clock ticked faster when timecounter uses
"mfp" (as default choice). It was introduced in rev 1.24 in 2006.
Thanks tsutsui@ for many comments.
Should be pulled up to netbsd-6 and netbsd-5.
- Restructure the code to do the checking in the appropriate note type,
and harmonize all the checks to be positive.
- Print only the tag data being careful not to overrun the allocated buffer.
This is in line with the core decision than even modular kernels should
contain the ffs code.
I've left in the code that tries to load "nfs" and "ext2fs", but it
isn't clear that is necessary.
Removes a warning message that (usually) flashes past to fast to read.
AFAICT all the relevant kernels contain ffs (and nfs for that matter).
assertion failure (and thus a crash in DIAGNOSTIC kernels). Independently
discovered by YAMAMOTO Takashi and Joel Sing.
To avoid this, introduce a cpu_mcontext_validate() function and move all
sanity checks from cpu_setmcontext() there. Also untangle the netbsd32
compat mess slightly and add a cpu_mcontext32_validate() cousin there.
Add an exhaustive atf test case, based partly on code from Joel Sing.
Should finally fix the remaining open part of PR kern/43903.
