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2020-05-31introduce "cpu_rnd_messybits" for use instead of nanotime in dev/rnd.c.David Gwynne
rnd.c uses nanotime to get access to some bits that change quickly between events that it can mix into the entropy pool. it doesn't use nanotime to get a monotonically increasing set or ordered and accurate timestamps, it just wants something with bits that change. there's been discussions for years about letting rnd use a clock that's super fast to read, but not necessarily accurate, but it wasn't until recently that i figured out it wasn't interested in time at all, so things like keeping a fast clock coherent between cpu cores or correct according to ntp is unecessary. this means we can just let rnd read the cycle counters on cpus and things will be fine. cpus with cycle counters that vary in their speed and arent kept consistent between cores may even be desirable in this context. so this is the first step in converting rnd.c to reading cycle counter. it copies the nanotime backend to each arch, and they can replace it with something MD as a second step later on. djm@ suggested rnd_messybytes, but we landed on cpu_rnd_messybits. thanks to visa for his eyes. ok deraadt@ visa@ deraadt@ says he will help handle any MD fallout that occurs.
2020-05-27Retire <machine/varargs.h>.Visa Hankala
Nothing uses the header anymore. OK deraadt@ mpi@
2020-05-26Rewrite m88k mutex code as a slight variation of the MI mutex code.Kenji Aoyama
This will make mutex spinning time visible in top(1), and also might improve stability. The major change in this is that the old assembly code acquires mutexes with an atomic exchange operation, but releases them with a regular store, but the new code always uses atomic exchange operations. The mutex.h changes to the macros conform to <sys/mutex.h> to be able to reset the system while in ddb. Suggested from Miod Vallat, tested by me. The stability in heavy load is greatly improved in my case.
2019-12-11%r26 hasn't been used by the threads implementation since 2016, so stopPhilip Guenther
resetting it in child_return() and update the comment in tcb.h to reflect reality ok miod@ aoyama@
2019-11-10TRUE/FALSE conversions missed in previous.Martin Pieuchot
2019-11-08Substitute boolean_t/TRUE/FALSE/db_addr_t by int/1/0/vaddr_t.Martin Pieuchot
Tested by miod@, ok aoyama@
2019-10-15Reduce the number of places where `p_priority' and `p_stat' are set.Martin Pieuchot
This refactoring will help future scheduler locking, in particular to shrink the SCHED_LOCK(). No intended behavior change. ok visa@
2019-09-06If uvm_map_inentry returns false then a signal has been delivered, andTheo de Raadt
userret() must be called on trap() exit to deliver it, rather than repeating the same cause infinitely. discovered by George Koehler ok kettenis bluhm visa
2019-08-28sys/arch/luna88k/luna88k/locore0.S:dummy_cpu assumes thatKenji Aoyama
ci_mp_atomic_{begin,end} are 6th and 7th elements of cpu_info structure. Actually that is dummy structure used in early boot stage, but for consistency, move ci_srp_hazards position in cpu_info. ok mpi@
2019-07-20Increment `db_active' before entering db_trap() like other archs do.Martin Pieuchot
ok visa@
2019-07-09I wrote the pc-page-writeable and sp-not-MAP_STACK code to be shared, andTheo de Raadt
then ran into the messaging being poor. Then I fixed the messages. But there are two sub-cases of sp-not-MAP_STACK -- one at syscall time, and another at regular userland trap (on some architectures), and I bungled that messaging. Correct that now, while I look for yet another better way... discovered by millert, who ran an pre-MAP_STACK binary.
2019-06-17add code to check stack pointer is within MAP_STACKTheo de Raadt
from miod
2019-04-23Remove file name and line number output from witness(4)Visa Hankala
Reduce code clutter by removing the file name and line number output from witness(4). Typically it is easy enough to locate offending locks using the stack traces that are shown in lock order conflict reports. Tricky cases can be tracked using sysctl kern.witness.locktrace=1 . This patch additionally removes the witness(4) wrapper for mutexes. Now each mutex implementation has to invoke the WITNESS_*() macros in order to utilize the checker. Discussed with and OK dlg@, OK mpi@
2018-12-05Include srp.h where struct cpu_info uses srp to avoid erroring out whenJonathan Gray
including cpu.h machine/intr.h etc without first including param.h when MULTIPROCESSOR is defined. ok visa@
2018-10-22More "explicitely" -> "explicitly" in various comments.Kenneth R Westerback
ok guenther@ tb@ deraadt@
2018-09-14Unify and bump some of the NMBCLUSTERS defines. Some archs had it set toClaudio Jeker
4MB which is far too low especially when the platform is able to run MP. New limits are, amd64 = 256M; arm64, mips64, sparc64 = 64M; alpha, arm, hppa, i386, powerpc = 32M; m88k, sh = 8M Still rather conservative numbers but much better than before. At least some hangs of arm64 build boxes was caused by this. OK kettenis@, visa@
2018-08-22Adding membar_xxx defines to userland.Kenji Aoyama
The src/lib/libc/thread/rthread.c 1.8 change adds #include <sys/atomic.h> in userland code. Current m88k atomic.h contents are inside of #if defined(_KERNEL) guard, then, nothing is defined for userland program. So we need adding some defines to compile it on m88k. The original diff is suggested from Miod Vallat, modified by the advice from mpi@ and kettenis@. ok kettenis@
2018-08-20Remove unused spllock().Visa Hankala
OK deraadt@ mpi@
2018-07-10Move from sendsig() to its callers the initsiginfo() calls andPhilip Guenther
instead of passing sendsig() the code+type+val, pass a siginfo_t* to copy from. Eliminate the indirection through struct emul for sendsig(); we no longer have a SunOS4-compat version of sendsig() ok deraadt@
2018-04-12Implement MAP_STACK option for mmap(). Synchronous faults (pagefault andTheo de Raadt
syscall) confirm the stack register points at MAP_STACK memory, otherwise SIGSEGV is delivered. sigaltstack() and pthread_attr_setstack() are modified to create a MAP_STACK sub-region which satisfies alignment requirements. Observe that MAP_STACK can only be set/cleared by mmap(), which zeroes the contents of the region -- there is no mprotect() equivalent operation, so there is no MAP_STACK-adding gadget. This opportunistic software-emulation of a stack protection bit makes stack-pivot operations during ROPchain fragile (kind of like removing a tool from the toolbox). original discussion with tedu, uvm work by stefan, testing by mortimer ok kettenis
2018-03-12Make luna88k use the MI mplock implementation.Kenji Aoyama
(forget to remove from repository) ok visa@
2018-03-12Make luna88k use the MI mplock implementation.Kenji Aoyama
ok visa@
2018-03-05#define _MAX_PAGE_SHIFT in MD _types.h as the maximum pagesize an archTheo de Raadt
needs (looking at you sgi, but others required this before). This is for the circumstances we need pagesize known at compile time, not getpagesize() runtime. Use it for malloc storage sizes, for shm, and to set pthread stack default sizes. The stack sizes were a mess, and pushing them towards page-aligned is healthy move (which will also be needed by the coming stack register checker) ok guenther kettenis, discussion with stefan
2018-01-13Define and use IPL_MPFLOOR in our common mutex implementation.Martin Pieuchot
ok kettenis@, visa@
2018-01-04Unify <machine/mutex.h> a bit further.Martin Pieuchot
Remove `mtx_lock' from i386, add volatile before `mtx_owner' where it was missing. Inputs from kettenis@, ok visa@
2017-12-14fcntl(F_SETFL) invokes the FIONBIO and FIOASYNC ioctls internally, soPhilip Guenther
the memory devices (/dev/null, /dev/zero, etc) need to permit them. problem noted, tweak, and testing by jeremy@ ok deraadt@
2017-12-04Change __mp_lock_held() to work with an arbitrary CPU info structure andMartin Pieuchot
extend ddb(4) "ps /o" output to print which CPU is currently holding the KERNEL_LOCK(). Tested by dhill@, ok visa@
2017-09-08If you use sys/param.h, you don't need sys/types.hTheo de Raadt
2017-09-05Move mutex, condvar, and thread-specific data routes, pthread_once, andPhilip Guenther
pthread_exit from libpthread to libc, along with low-level bits to support them. Major bump to both libc and libpthread. Requested by libressl team. Ports testing by naddy@ ok kettenis@
2017-06-22Tidy up comment about double load opcodes in m88k/eh_common.S (and fix ;; -> ||)Tom Cosgrove
ok miod@
2017-05-30Kill db_sym_t.Martin Pieuchot
ok deraadt@, kettenis@, jasper@
2017-05-29Kill SPINLOCK_SPIN_HOOK, use CPU_BUSY_CYCLE() instead.Martin Pieuchot
ok visa@, kettenis@
2017-05-29copyin32 implementation from miod@Martin Pieuchot
ok kettenis@
2017-04-30Rename Debugger() into db_enter().Martin Pieuchot
Using a name with the 'db_' prefix makes it invisible from the dynamic profiler. ok deraadt@, kettenis@, visa@
2017-04-20Hook up mutex(9) to witness(4).Visa Hankala
2017-04-13Provide mips64 with kernel-facing TCB_{GET,SET} macros that store itPhilip Guenther
in struct mdproc. With that, all archs have those and the __HAVE_MD_TCB macro can be unifdef'ed as always defined. ok kettenis@ visa@ jsing@
2017-03-19Put the address of the per-cpu clock and interrupt registers into the cpu_infoMiod Vallat
struct, rather than fetching them from arrays every time they are needed. ok aoyama@
2017-02-15Make this build (and run) with gcc 4.Miod Vallat
2017-02-12Split up fork1():Philip Guenther
- FORK_THREAD handling is a totally separate function, thread_fork(), that is only used by sys___tfork() and which loses the flags, func, arg, and newprocp parameters and gains tcb parameter to guarantee the new thread's TCB is set before the creating thread returns - fork1() loses its stack and tidptr parameters Common bits factor out: - struct proc allocation and initialization moves to thread_new() - maxthread handling moves to fork_check_maxthread() - setting the new thread running moves to fork_thread_start() The MD cpu_fork() function swaps its unused stacksize parameter for a tcb parameter. luna88k testing by aoyama@, alpha testing by dlg@ ok mpi@
2017-02-08In exec_elf.c: expand ELFNAME(), ELFNAME2(), and ELFNAMEEND() exceptPhilip Guenther
leaving out the size, so that ELFNAME2(exec,makecmds) becomes exec_elf_makecmds instead of exec_elf{32,64}_makecmds and then delete the ELFNAME2() and ELFNAMEEND() macros. Move the prototypes for functions local to exec_elf.c to there from exec_elf.h. Simplify the SMALL_KERNEL conditionals around the ELF coredump code. Change exec_conf.c to use the size-generic names and macros Remove exec_elf{32,64}.c and just build exec_elf.c; delete the _KERN_DO_ELF and _KERN_DO_ELF64 #defines. ok jca@, encouragement from deraadt@ and tom@
2016-10-19Change process_{domem,auxv_offset}() to take a process instead of a proc.Philip Guenther
Make process_auxv_offset() take and release a reference of the vmspace like process_domem() does. ok kettenis@
2016-10-19Change pmap_proc_iflush() to take a process instead of a procPhilip Guenther
powerpc: rename second argument of pmap_proc_iflush() to match other archs ok kettenis@
2016-10-09Tweak the special handling of pid 1 in setregs()...and document thatPhilip Guenther
while it's not 100% correct, it's okay tested by aoyama@
2016-10-09Apply consistency to forever loops with continue and NOTREACHEDTom Cosgrove
Same thought from kettenis@, ok krw@ phessler@ millert@
2016-10-08Report the PID in sendsig() debuggingPhilip Guenther
tested by aoyama@
2016-09-25Make a move towards ending 4 decades of kernel snooping.Theo de Raadt
Add sysctl kern.allowkmem (default 0) which controls the ability to open /dev/mem or /dev/kmem at securelevel > 0. Over 15 years we converted 99% of utilities in the tree to operate on sysctl-nodes (either by themselves or via code hiding in the guts of -lkvm). pstat -d and -v & procmap are affected and continued use of them will require kern.allowkmem=1 in /etc/sysctl.conf. acpidump (and it's buddy sendbug) are affected, but we'll work out a solution soon. There will be some impact in ports. ok kettenis guenther
2016-09-19ansify function definitionsJasper Lievisse Adriaanse
ok guenther@ millert@
2016-09-15all pools have their ipl set via pool_setipl, so fold it into pool_init.David Gwynne
the ioff argument to pool_init() is unused and has been for many years, so this replaces it with an ipl argument. because the ipl will be set on init we no longer need pool_setipl. most of these changes have been done with coccinelle using the spatch below. cocci sucks at formatting code though, so i fixed that by hand. the manpage and subr_pool.c bits i did myself. ok tedu@ jmatthew@ @ipl@ expression pp; expression ipl; expression s, a, o, f, m, p; @@ -pool_init(pp, s, a, o, f, m, p); -pool_setipl(pp, ipl); +pool_init(pp, s, a, ipl, f, m, p);
2016-09-04TCB_GET_MEMBER() is no longer used after the TIB changesPhilip Guenther
2016-09-03Increase the number of mbufs on most architectures. This is basedAlexander Bluhm
on a guess how much memory a typical machine has. If the value is too high, users may run out of kernel memory. Then we will have to adjust this again. OK claudio@ deraadt@
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