CVS log for src/sys/arch/sun3/sun3/trap.c

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Default branch: MAIN

Largely unify the <machine/cpu.h> headers on the m68k platforms.

Re-factor the 680x0 Function Code definitions into their own
separate file (as was done on the sun2/sun3 ports ages ago)
and switch everyone to the common header.

Arrange to update cached LWP credentials in userret() rather than during
syscall/trap entry, eliminating a test+branch on every syscall/trap.

This wasn't possible in the 3.99.x timeframe when l->l_cred came about
because there wasn't a reliable/timely way to force an ONPROC LWP running on
a remote CPU into the kernel (which is just about the only new thing in
this scheme).

Fix siginfo support for amiga, mac68k, and sun3:

- T_ZERODIV is integer divide by zero. Therefore, ksi_code should be
  FPE_INTDIV, not FPE_FLTDIV.

- Set ksi_addr for SIGTRAP. Also, set TRAP_BRKPT or TRAP_TRACE to
  ksi_code appropriately.

This fixes some tests in lib/libc/sys and lib/libc/gen.

XXX
Apply similar fixes to other m68k ports.

Merge changes from current as of 20200406

mi_userret(): take care of calling preempt(), set spc_curpriority directly,
and remove MD code that does the same.

Sync with HEAD

Overhaul the API used to fetch and store individual memory cells in
userspace.  The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms.  The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

update from HEAD

Sync with HEAD

Handle EINVAL in the fault path and send SIGBUS on mmap'd access past EOF

Rebase to HEAD as of a few days ago.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

Whitespace cleanup.

sync with head

sync to -current.

Remove COMPAT_SA / KERN_SA.  Welcome to 6.99.3!
Approved by core@.

Sync with HEAD.

sync with head

Explicitly include <machine/pcb.h> for struct pcb.

Move counting of faults, traps, intrs, soft[intr]s, syscalls, and nswtch
from uvmexp to per-cpu cpu_data and move them to 64bits.  Remove unneeded
includes of <uvm/uvm_extern.h> and/or <uvm/uvm.h>.

Sync with HEAD.

sync with head.

implement ucas_* for m68k.

sync with head

Sync with HEAD.

fix copy{in,out}{,str}() to return the error returned by uvm_fault().
fixes PR 41813.

sync with head

Use lwp_getpcb() on sparc{64} and sun2/3 MD code, clean from struct user usage.

sync with head.

Sync with HEAD.

Pull up following revision(s) (requested by martin in ticket #332):
	sys/arch/amiga/amiga/trap.c: revision 1.122
	sys/arch/atari/atari/trap.c: revision 1.99
	sys/arch/cesfic/cesfic/trap.c: revision 1.43
	sys/arch/hp300/hp300/trap.c: revision 1.140
	sys/arch/luna68k/luna68k/trap.c: revision 1.55
	sys/arch/m68k/include/signal.h: revision 1.25
	sys/arch/m68k/m68k/sig_machdep.c: revision 1.41
	sys/arch/mac68k/mac68k/trap.c: revision 1.136 via patch
	sys/arch/mvme68k/mvme68k/trap.c: revision 1.98
	sys/arch/news68k/news68k/trap.c: revision 1.60
	sys/arch/next68k/next68k/trap.c: revision 1.75
	sys/arch/sun2/sun2/trap.c: revision 1.37
	sys/arch/sun3/sun3/trap.c: revision 1.136
	sys/arch/x68k/x68k/trap.c: revision 1.97
Centralize fpu exception to siginfo code encoding for all m68k archs,
fixes a failure in the lib/libc/ieeefp/except regression test.

Centralize fpu exception to siginfo code encoding for all m68k archs,
fixes a failure in the lib/libc/ieeefp/except regression test.

Sync with HEAD.

Sync with HEAD.

Merge wrstuden-revivesa into HEAD.

Re-add cpu_upcall() and page fault code. i386 kernels now compile.
They don't boot, but that seems to be a consequence of current from the
day this branch was started.

Sync with HEAD.

sync with head.

Per discussion with ad at n dot o, revert signal mask handling
changes.

The l_sigstk changes are most likely totally un-needed as SA will
never use a signal stack - we send an upcall (or will as other
diffs are brought in).

The l_sigmask changes were too controvertial. In all honesty, I
think it's probably best to revert them. The main reason they were
there is the fact that in an SA process, we don't mask signals per
kernel thread, we mask them per user thread. In the kernel, we want
them all to get turned into upcalls. Thus the normal state of
l_sigmask in an SA process is for it to always be empty.

While we are in the process of delivering a signal, we want to
temporarily mask a signal (so we don't recursively exhaust our
upcall stacks). However signal delivery is rare (important, but
rare), and delivering back-to-back signals is even rarer. So rather
than cause every user of a signal mask to be prepared for this very
rare case, we will just add a second check later in the signal
delivery code. Said change is not in this diff.

This also un-compensates all of our compatability code for dealing
with SA. SA is a NetBSD-specific thing, so there's no need for
Irix, Linux, Solaris, SVR4 and so on to cope with it.

As previously, everything other than kern_sa.c compiles in i386
GENERIC as of this checkin. I will switch to ALL soon for compile
testing.

Initial checkin of re-adding SA. Everything except kern_sa.c
compiles in GENERIC for i386. This is still a work-in-progress, but
this checkin covers most of the mechanical work (changing signalling
to be able to accomidate SA's process-wide signalling and re-adding
includes of sys/sa.h and savar.h). Subsequent changes will be much
more interesting.

Also, kern_sa.c has received partial cleanup. There's still more
to do, though.

Merge proc::p_mutex and proc::p_smutex into a single adaptive mutex, since
we no longer need to guard against access from hardware interrupt handlers.

Additionally, if cloning a process with CLONE_SIGHAND, arrange to have the
child process share the parent's lock so that signal state may be kept in
sync. Partially addresses PR kern/37437.

Sync with HEAD.

sync with head.

Sync with HEAD

sync with HEAD

Sync with HEAD.

Don't set l_usrpri / spc_curpriority here. mi_userret() does it.

Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree.  Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches.  The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Sync with head.

Sync with HEAD

Sync with somewhat-recent netbsd-4.

Pull up following revision(s) (requested by mhitch in ticket #866):
	sys/arch/atari/atari/trap.c:		1.92
	sys/arch/mac68k/mac68k/trap.c:		1.129
	sys/arch/amiga/amiga/trap.c:		1.116
	sys/arch/mvme68k/mvme68k/trap.c:	1.91
	sys/arch/news68k/news68k/trap.c:	1.54
	sys/arch/sun3/sun3/trap.c:		1.131
	sys/arch/next68k/next68k/trap.c:	1.68
	sys/arch/luna68k/luna68k/trap.c:	1.47
	sys/arch/cesfic/cesfic/trap.c:		1.36
	sys/arch/x68k/x68k/trap.c:		1.90
	sys/arch/hp300/hp300/trap.c:		1.132
68030 and 68040 processors consider the read portion of a read-modify-write
transfer as a write to ensure the memory is writable before starting any
transfer.  The fault status information does not reflect this in the 'read'
status bit (i.e. it shows up as a read access), so faults with a RMW access
to non-writable memory was not getting the correct protection.  The page would
be read-only and the instruction would fault over and over.
A specific example is when a process forks, and the child process attempts
to execute a RMW access to a data page, which is read-only because it's CoP
Copy-On-Write.
When checking if the page needs to be writablek, also check the locked transfer
and treat any locked transfer as a write.
68060 already handled this correctly, since it has separate read and write
fault bits, and both are set on a RMW access and the trap code was checking
the write status bit.
Fixes PR#36848.

Sync with HEAD.

sync with head.

Sync with HEAD.

Sync w/ NetBSD-4-RC_1

68030 and 68040 processors consider the read portion of a read-modify-write
transfer as a write to ensure the memory is writable before starting any
transfer.  The fault status information does not reflect this in the 'read'
status bit (i.e. it shows up as a read access), so faults with a RMW access
to non-writable memory was not getting the correct protection.  The page would
be read-only and the instruction would fault over and over.

A specific example is when a process forks, and the child process attempts
to execute a RMW access to a data page, which is read-only because it's CoP
Copy-On-Write.

When checking if the page needs to be writablek, also check the locked transfer
and treat any locked transfer as a write.

68060 already handled this correctly, since it has separate read and write
fault bits, and both are set on a RMW access and the trap code was checking
the write status bit.

Fixes PR#36848.

Sync with head.

Sync with head.

Sync with HEAD.

Pull up following revision(s) (requested by mhitch in ticket #728):
	sys/arch/mvme68k/mvme68k/locore.s: revision 1.98
	sys/arch/mac68k/mac68k/trap.c: revision 1.128
	sys/arch/next68k/next68k/locore.s: revision 1.48
	sys/arch/mac68k/mac68k/locore.s: revision 1.152
	sys/arch/sun3/sun3/locore.s: revision 1.88
	sys/arch/sun2/sun2/locore.s: revision 1.19
	sys/arch/sun2/sun2/trap.c: revision 1.32
	sys/arch/m68k/m68k/db_trace.c: revision 1.51
	sys/arch/mvme68k/mvme68k/trap.c: revision 1.90
	sys/arch/news68k/news68k/trap.c: revision 1.53
	sys/arch/luna68k/luna68k/locore.s: revision 1.27
	sys/arch/atari/atari/locore.s: revision 1.99
	sys/arch/sun3/sun3/trap.c: revision 1.130
	sys/arch/x68k/x68k/trap.c: revision 1.89
	sys/arch/next68k/next68k/trap.c: revision 1.67
	sys/arch/x68k/x68k/locore.s: revision 1.79
	sys/arch/news68k/news68k/locore.s: revision 1.43
	sys/arch/luna68k/luna68k/trap.c: revision 1.46
	sys/arch/hp300/hp300/locore.s: revision 1.140
	sys/arch/cesfic/cesfic/locore.s: revision 1.15
	sys/arch/cesfic/cesfic/trap.c: revision 1.35
	sys/arch/m68k/m68k/trap_subr.s: revision 1.12
	sys/arch/amiga/amiga/locore.s: revision 1.143
Pass a frame pointer to trap() rather than the 'entire frame' trick.  Gcc4
was optimizing away modifications to the frame contents (it's not nice to
trick gcc).  Pass the pointer as the first argument to reduce the number
of places that would be changed otherwise.  Fixes the getcwd regression
test on most m68k ports.

Pass a frame pointer to trap() rather than the 'entire frame' trick.  Gcc4
was optimizing away modifications to the frame contents (it's not nice to
trick gcc).  Pass the pointer as the first argument to reduce the number
of places that would be changed otherwise.  Fixes the getcwd regression
test on most m68k ports.

Sync with head.

Update to HEAD.

Adapt sun68k ports to yamt-idlelwp.
Tested on TME (sun2 and sun3) and 3/80 (sun3x).

Sync with HEAD.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

sync with head.

Merge newlock2 to head.

Update m68k pasteware.

Remove support for SA. Ok core@.

sync with head.

sync with head

sync with head

Use the LWP cached credentials where sane.

- Hold a reference to the process credentials in each struct lwp.
- Update the reference on syscall and user trap if p_cred has changed.
- Collect accounting flags in the LWP, and collate on LWP exit.

sync with head.

Sync with head.

Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.

sync with head.

include kauth.h for kauth_cred_geteuid.

integrate kauth.

Sync with head.

sync with head - hopefully this will work

sync with head.

adapt to uvm_fault() interface cleanup: kill the useless 3rd argument

Adapt to kernel authorization KPI.

I expect *some* lossage here...

sync with head.

Fix some typos.

merge ktrace-lwp.

Sync with HEAD. Here we go again...

Constify.

sync with -current

Sync with HEAD.

de-__P, remove register, ansify, b* -> mem*, u_int*_t -> uint*_t.

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

use uvm_grow() to update stack segment size on stack page fault instead
of MD code

Sync with HEAD

add kernel part of concurrency support for SA on MP systems
- move per VP data into struct sadata_vp referenced from l->l_savp
  * VP id
  * lock on VP data
  * LWP on VP
  * recently blocked LWP on VP
  * queue of LWPs woken which ran on this VP before sleep
  * faultaddr
  * LWP cache for upcalls
  * upcall queue
- add current concurrency and requested concurrency variables
- make process exit run LWP on all VPs
- make signal delivery consider all VPs
- make timer events consider all VPs
- add sa_newsavp to allocate new sadata_vp structure
- add sa_increaseconcurrency to prepare new VP
- make sys_sa_setconcurrency request new VP or wakeup idle VP
- make sa_yield lower current concurrency
- set sa_cpu = VP id in upcalls
- maintain cached LWPs per VP

Remove obsolete comments about curproc.

Reduce code duplication by adding mi_userret() in sys/userret.h
containing signal posting, kernel-exit handling and sa_upcall processing.

XXX the pc532, sparc, sparc64 and vax ports should have their
XXX userret() code rearranged to use this.

* Shuffle some data structures so, and add a flags word to ksiginfo_t.
  Right now the only flag is used to indicate if a ksiginfo_t is a
  result of a trap.  Add a predicate macro to test for this flag.
* Add initialization macros for ksiginfo_t's.
* Add accssor macro for ksi_trap.  Expands to 0 if the ksiginfo_t was
  not the result of a trap.  This matches the sigcontext trapcode semantics.
* In kpsendsig(), use KSI_TRAP_P() to select the lwp that gets the signal.
  Inspired by Matthias Drochner's fix to kpsendsig(), but correctly handles
  the case of non-trap-generated signals that have a > 0 si_code.

This patch fixes a signal delivery problem with threaded programs noted by
Matthias Drochner on tech-kern.

As discussed on tech-kern.  Reviewed and OK's by Christos.

SA_SIGINFO support for m68k (port specific changes)

add MD part of SA/pthread pagefault handling on all m68k ports

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

Make sure to include opt_foo.h if a defflag option FOO is used.

Merge the nathanw_sa branch.

In the SA universe, the switch-to-this-LWP decision is made at a
different level than where preempt() calls are made, which renders
the "newlwp" argument useless.  Replace it with a "more work to do"
boolean argument.  Returning to userspace preempt() calls pass 0.
"Voluntary" preemptions in e.g. uiomove() pass 1.  This will be used
to indicate to the SA subsystem that the LWP is not yet finished in
the kernel.

Collapse the SA vs. non-SA cases of preempt() together, making the
conditional code block much smaller, and don't call sa_preempt() if
more work is to come.

NOTE: THIS IS NOT A COMPLETE FIX TO THE preempt()-in-uiomove() PROBLEM
THAT CURRENTLY EXISTS FOR SA PROCESSES.

Merge pcred and ucred, and poolify.  TBD: check backward compatibility
and factor-out some higher-level functionality.

Catch up to -current

merge the 12 copies of vm_machdep.c on the m68k platforms.
clean up some other stuff along the way, including:
 - use m68k/cacheops.*, remove duplicates from cpu.h.
 - centralize a few declarations in (all the copies of) cpu.h.
 - define M68K_VAC on platforms which have a VAC.
 - switch the sun platforms to the (now common) proc_trampoline().
 - do the phys_map thang on the sun platforms too, no reason not to.

Change "if (l->l_flag & L_SA_UPCALL)" to "while (l->l_flag & L_SA_UPCALL)"
in userret() functions or equivalent, to permit delivery of multiple upcalls
in a single kernel entry.

XXX It's getting crowded in here. Collapsing posting signals, upcalls, and
XXX kernel-exit handling into one mechanism would be nice.

No longer need to pull in lwp.h; proc.h pulls it in for us.

Curproc->curlwp renaming.

Change uses of "curproc->l_proc" back to "curproc", which is more like the
original use. Bare uses of "curproc" are now "curlwp".

"curproc" is now #defined in proc.h as ((curlwp) ? (curlwp)->l_proc) : NULL)
so that it is always safe to reference curproc (*de*referencing curproc
is another story, but that's always been true).

catch up with -current on kqueue branch

Catch up to -current.

Eliminate more commons or redundant declarations.

Catch up with -current.

Catch up to -current.

allow writing to write-only mappings.  fixes PR 3493.

cpu_upcall() -> sa_upcall_userret().

Deal with `want_resched' with trap()'s T_ASTFLT case where it belongs
instead of in userret().

MD Scheduler Activation bits for sun3/3x.
Compile-tested only.

Update the kqueue branch to HEAD.

file trap.c was added on branch nathanw_sa on 2001-11-18 19:39:03 +0000

- vm_offset_t -> vaddr_t, vsize_t, paddr_t
- vm_size_t -> vsize_t
- remove register prefixes
- misc cleanup

Catch up to -current.

clear and restore pcb_onfault around calling uvm_fault(),
so that bugs in the fault-handling code will panic sooner.

replace vm_map{,_entry}_t with struct vm_map{,_entry} *.

add missing   #include "opt_kgdb.h"

Catch up with -current.

Sync with HEAD.

eliminate the KERN_* error codes in favor of the traditional E* codes.
the mapping is:

KERN_SUCCESS			0
KERN_INVALID_ADDRESS		EFAULT
KERN_PROTECTION_FAILURE		EACCES
KERN_NO_SPACE			ENOMEM
KERN_INVALID_ARGUMENT		EINVAL
KERN_FAILURE			various, mostly turn into KASSERTs
KERN_RESOURCE_SHORTAGE		ENOMEM
KERN_NOT_RECEIVER		<unused>
KERN_NO_ACCESS			<unused>
KERN_PAGES_LOCKED		<unused>

Sync with HEAD.

switch sun3 to ELF.  highlight include:
add "%" prefix to register names in assembly code.
change assembly functions to return values in %a0 instead of %d0.
C symbols no longer prepend an underscore, adjust assembly code for this.
32-bit values are now 32-bit aligned instead of 16-bit aligned,
adjust structure packing and padding to override this where necessary.
make EXEC_ELF std, make EXEC_AOUT and COMPAT_AOUT_M68K optional.
use the MI loadfile() instead of several home-grown versions.

Sync with HEAD.

Remove reg_dump() declaration, which is in <m68k/m68k.h>

Sync with HEAD

adapt to recent changes of signal structures

Unification of the m68k syscall() function.

Sync with HEAD.

restructure struct emul and execsw, in preparation to make emulations LKMable:
* move all exec-type specific information from struct emul to execsw[] and
  provide single struct emul per emulation
* elf:
  - kern/exec_elf32.c:probe_funcs[] is gone, execsw[] how has one entry
    per emulation and contains pointer to respective probe function
  - interp is allocated via MALLOC() rather than on stack
  - elf_args structure is allocated via MALLOC() rather than malloc()
* ecoff: the per-emulation hooks moved from alpha and mips specific code
  to OSF1 and Ultrix compat code as appropriate, execsw[] has one entry per
  emulation supporting ecoff with appropriate probe function
* the makecmds/probe functions don't set emulation, pointer to emulation is
  part of appropriate execsw[] entry
* constify couple of structures

Update thorpej_scsipi to -current as of a month ago
A i386 GENERIC kernel compiles without the siop, ahc and bha drivers
(will be updated later). i386 IDE/ATAPI and ncr work, as well as
sparc/esp_sbus. alpha should work as well (untested yet).
siop, ahc and bha will be updated once I've updated the branch to current
-current, as well as machine-dependant code.

remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

remove redudant <vm/pmap.h> includes. <vm/pmap.h> -> <uvm/uvm_pmap.h>

Sync w/ netbsd-1-5-base.

defopt SYSCALL_DEBUG.

Reduce use of curproc in several places:

 - Change ktrace interface to pass in the current process, rather than
p->p_tracep, since the various ktr* function need curproc anyway.

 - Add curproc as a parameter to mi_switch() since all callers had it
handy anyway.

 - Add a second proc argument for inferior() since callers all had
curproc handy.

Also, miscellaneous cleanups in ktrace:

 - ktrace now always uses file-based, rather than vnode-based I/O
(simplifies, increases type safety); eliminate KTRFLAG_FD & KTRFAC_FD.
Do non-blocking I/O, and yield a finite number of times when receiving
EWOULDBLOCK before giving up.

 - move code duplicated between sys_fktrace and sys_ktrace into ktrace_common.

 - simplify interface to ktrwrite()

First sweep at scheduler state cleanup.  Collect MI scheduler
state into global and per-CPU scheduler state:

	- Global state: sched_qs (run queues), sched_whichqs (bitmap
	  of non-empty run queues), sched_slpque (sleep queues).
	  NOTE: These may collectively move into a struct schedstate
	  at some point in the future.

	- Per-CPU state, struct schedstate_percpu: spc_runtime
	  (time process on this CPU started running), spc_flags
	  (replaces struct proc's p_schedflags), and
	  spc_curpriority (usrpri of processes on this CPU).

	- Every platform must now supply a struct cpu_info and
	  a curcpu() macro.  Simplify existing cpu_info declarations
	  where appropriate.

	- All references to per-CPU scheduler state now made through
	  curcpu().  NOTE: this will likely be adjusted in the future
	  after further changes to struct proc are made.

Tested on i386 and Alpha.  Changes are mostly mechanical, but apologies
in advance if it doesn't compile on a particular platform.

Use preempt(), not an open-coded equivalent (which won't be
equivalent for long).

Pull up to last week's -current.

clrnd()/clbase() discarding.

Sync with -current

Fix the problem that single-step tracing of a trap instruction
drops the system into kernel debugger.

completely remove Mach VM support.  all that is left is the all the
header files as UVM still uses (most of) these.

if uvm_fault() fails with KERN_RESOURCE_SHORTAGE, send a SIGKILL
and print a message about it.  this will be used to recover from
out-of-swap conditions.

Added COMPAT_LINUX support.

Changes to support fork_kthread():
- cpu_set_kpc() now takes void *arg third argument, passed to the
  entry point.
- cpu_fork() allows parent to be non-curproc iff parent is proc0.
  When forking non-curproc, assume its state has already been saved.
- Adjust various pieces of machine-dependent code to account of all of this.

Adapt to signal changes.

Make DDB work again.

defopt COMPAT_SUNOS

defopt KTRACE

Move sun3x _pmap_fault macro from pmap.h to trap.c

Add UVM support

Make the messages printed by _nodb_trap() more helpful.

Merge arch/sun3x into arch/sun3

Merged Sun3 and Sun3X kernel sources.

Pull rev 1.73 up from trunk (gwr)

Remove the broken trap recursion check (#if DEBUG)

Significantly restructure the way signal state for a process is stored.
Rather than using bitmasks to redundantly store the information kept
in the process's sigacts (because the sigacts was kept in the u-area),
hang sigacts directly off the process, and access it directly.

Simplify signal setup code tremendously by storing information in
the sigacts as an array of struct sigactions, rather than in a different
format, since userspace uses sigactions.

Make sigacts sharable by adding reference counting.

Update marc-pcmcia branch from trunk.

Resolve conflict with <m68k/cpu.h>

%x -> 0x%x, fixes for PR#3757

Pull in m68k/cpu.h to get regdump() prototype

Merge changes from the trunk

Merge in changes from The Trunk

Correct handling for Trap #2 in SunOS executables,
now that we know it is supposed to flush the cache.
(Was thought to be "some obscure FPU operation".)

Add a debug helper for detecting recursive kernel-mode traps.
Move straytrap() here from machdep.c

The KGDB include is now <sys/kgdb.h>
Add the kgdb_recover trick.

Change most occurrences of "struct frame" (union of all frames formats)
to "struct trapframe" (the minimal frame) because in most cases, all we
care about is the minimal, invariant part.  Further, if the declaration
says we have an arg of type "frame" (big union), then KGDB will try to
print the whole bloody thing out whether you want to see it or not.

Also add the function trap_kdebug() which takes care of calling one of:
kgdb_trap (for KGDB), or kdb_trap, (for DDB) or the Sun PROM monitor.
This logic used to be in locore, but it is better as C code.

Nuke sunmon.h, add machdep.h

Sync. with the sun3x version (now the same, so sun3x can use this).
Update exframesize[] array from hp300, comments, misc. cleanup, etc.
Replace machine-dependent section that called pmap_fault_reload()
with a simple call to the new _pmap_fault() macro which does any
of that MD stuff that might be necessary.

Update from trunk.

Use db_regs_t instead of struct mc68020_saved_state

Make sure the MDP_STACKADJ flag is cleared in p->p_md.md_flags
Do this in both machdep.c:setregs() and trap.c:(end of syscall)
for now.  Need more analysis to see what is the best way...
Fixes PR#3034 (Thanks very much to Ian Dall for the fix!)

Make this compile with -Werror -Wall -Wstrict-prototypes
(finally! yea!)  Also get rid of __BROKEN_INDIRECT_CONFIG

backout previous kprintf change

printf -> kprintf, sprintf -> ksprintf

Use SIGBUS iff we get a legitimate bus fault.  Use SIGSEGV for page protection
violations (per Solaris, SVR4, AIX, Linux, Irix, and SunOS).

KGDB support

file trap.c was added on branch netbsd-1-2 on 1996-06-17 15:41:06 +0000

KGDB support

Correct type of the nofault pointer.

SUNOS_SYS_sunos_sigreturn -> SUNOS_SYS_sigreturn

Correct child_return() so child is charged for its cpu time.

Do errno translation when emulation needs it.

Fix uses of btoc() which requires an unsigned arg.

Add a comment

Add child_return()

SUNOS_SYS_sigreturn -> SUNOS_SYS_sunos_sigreturn
Also, add check for trap during panic.

Fixed comparison in SYS__syscall to be against sysent instead of
p->p_emul->e_sysent [Thanks Charles for pointing this out].
I think that this code needs to be fixed anyway for emulations where
SYS_syscall is not the same number as the NetBSD one (0)... (Only the
alpha port so far?)

- added sunos_machdep.c for sun3, atari, amiga and mac68k.
- changed machdep.c and trap.c to use struct emul.
- remove ep_setup references.
- added struct emul to all emulations.

Look out for null curproc->p_addr which caused a "Watchdog Reset!"
when the recursive faults overflowed the stack.  (from David Jones)

Nuke FPCOPROC

invoke ktrsyscall with (vp, code, argsize, args) as args.

Fix last arg to scdebug_ret().

Fix some types:
* code, args, and rval should use register_t.
* argsize should be a size_t.

Call fpu_emulate to handle T_FPEMULI or T_FPEMULD traps.

Call trap() for FP faults (T_FPEMULI*)

Add hack to block interrupts while in ddb.

Just return if kdb_trap returns non-zero (now that kdb_trap is fixed).
Print correct message for kernel coprocessor exception.

Fix syntax errors in some #ifdef code.

Cleanup

Make traps that will panic stop ONCE in the debugger.

Make a branch that works with the 1.0 code base.

Fix syscall arg copyin, etc.

Revert trap/dopanic case (avoid recursive traps).

sun_* -> sunos_*

Lots of changes.  Fairly stable now.

new RCS ID format.

update for new syscall args description mechanism

Cleanup, use obio_find_mapping() instead of xxx_va

file trap.c was added on branch netbsd-1-0 on 1994-09-20 16:52:31 +0000

Cleanup, use obio_find_mapping() instead of xxx_va

from trunk, per gwr.

Conditionalize some more debugging code.
(Don't need to drop into DDB on each COW fault :-)

updates from trunk, per gwr

miscellaneous cleanup

Oops, the call to trapsignal needs to be conditional.

Yes, trap() can be called when curproc==NULL

Make setsoft* use the real software interrupt register.
Integrate several fixes from the amiga port (and drop COMPAT_HPUX for now).
Add lots of debugging checks to pmap.c - still needs work.

Catch up with frame.h chages, merge stuff from new hp300 port.

swtch() ==> cpu_switch(), add cpu_coredump()

Lite: setrq -> setrunqueue

Add CTL_HW stuff, cpu_sysctl, replace ss_onstack...

Add the hooks to make ddb work.

Tracking 4.4 integration

proc flag names

HPUXCOMPAT changed to COMPAT_HPUX

fixed to use new queue stuff. random diffs to make ddb stuff mostly compile

compiles again. also cleanup of development printfs. and trap stuff

sys to sun_sys

part one of two..need to give someone a ring...

bugs fixed and cleanup

boots, presents shell prompt, and doesn't crash immediately

sun3 port works under NetBSD-current now.  rcsids probably fucked

snapshot of my private sources

Now works with current tree, as opposed to the july 8th tree in which it was
written.
Requires magnum infrastructure now, particularly the clock stuff.
Fails to exec init because the /sbin/init binary
is a sunos binary.  Next step is to integrate sunos compatibility code
from /sys/compat/sunos, and the amiga port.
Does not yet implement MACHINE_NOCONTIG support.

[from glass Mon Nov 22 21:22:45 PST 1993  home tag: home2]

sun3 port updated. netboot integrated.

last snapshot before uploading.  we still have serious clock problems

gets past enablertclock(), now time to deal with the mountroot mess

snapshot. for uploading.  gets lost in swtch after enablertclock()

it links with out any unresolved symbols, last few are just stubs
because we aren't likely to get near execing init for a while