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2019-03-24Add intr_{disable,restore}() for alpha.Visa Hankala
Reminded by deraadt@
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@
2018-09-14Unify 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@
2018-08-20Remove unused spllock().Visa Hankala
OK deraadt@ mpi@
2018-04-09Fill in FRAME_PS after the fact. What a ridiculous design decision.Theo de Raadt
It would be better if this was filled in at trap time. ok guenther
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
2018-01-25Move common mutex implementations to a MI place.Martin Pieuchot
Archs not yet converted can to the jump by defining __USE_MI_MUTEX. ok visa@
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@
2017-12-04Change __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@
2017-11-02Switch DEC 3000 (TURBOchannel) alpha serial code to MI z8530 code.Martin Pieuchot
ttyB* minor numbers change; be sure to rerun MAKEDEV if you do not upgrade with bsd.rd Adapted from NetBSD by miod@
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@
2017-06-29kill RCSID macros; discussed with millertTheo de Raadt
2017-06-05Split early startup code out of locore.S into locore0.S. Adjust linkTheo de Raadt
run so that this locore0.o is always at the start of the executable. But randomize the link order of all other .o files in the kernel, so that their exec/rodata/data/bss segments land all over the place. Late during kernel boot, smash the startup code with traps so that it does not point to the other randomly placed code. It has be smashed, because alpha (insecurely in my view) runs in the KSEG0 space. As a result, the internal layout of every newly build bsd kernel is different from past kernels. Internal relative offsets are not known to an outside attacker. The only known offsets are in the startup code, which is gone. Ramdisk kernels cannot be compiled like this, because they are gzip'd. When the internal pointer references change, the compression dictionary bloats and results in poorer compression.
2017-05-29Kill SPINLOCK_SPIN_HOOK, use CPU_BUSY_CYCLE() instead.Martin Pieuchot
ok visa@, kettenis@
2017-05-08add a BUS_DMA_64BIT flag to bus_dma on all our archs.David Gwynne
this is so drivers can advertise that they can handle 64 dma addresses to the platform. it may choose to handle dmamaps differently based on this flag. tweaks and ok tom@ ok kettenis@
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@
2017-02-08In 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@
2016-11-07Hide FIX_SSTEP() behind #ifdef _KERNELPhilip Guenther
ok deraadt@
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@
2016-06-13rename _splraise to splraiseDavid Gwynne
gets us a bit closer to an MI splraise api.
2016-05-27Remove the non ELF macrosTheo de Raadt
ok millert
2016-05-15Implement TCB_{GET,SET} using PAL_{rd,wr}unique.Philip Guenther
Inline asm from NetBSD testing deraadt@
2016-05-10SROP mitigation. sendsig() stores a (per-process ^ &sigcontext) cookieTheo de Raadt
inside the sigcontext. sigreturn(2) checks syscall entry was from the exact PC addr in the (per-process ASLR) sigtramp, verifies the cookie, and clears it to prevent sigcontext reuse. not yet tested on landisk, sparc, *88k, socppc. ok kettenis
2016-05-03alias bus_space_{read,write}_raw to the non-raw counterpartsDavid Gwynne
busses are little endian, so the non-raw ops are raw anyway. fixes the kernel build after xge grew the use of the raw ops.
2016-04-27G/C DDB_REGS.Martin Pieuchot
2016-04-20Move back #include <sys/mutex.h> outside #ifdef _KERNEL as it wasLandry Breuil
originally intended in r1.38. (ie more or less revert r1.39) (re-)Fixes at least net/net-snmp, sysutils/gkrellm/gkrellm,-client, sysutils/xuvmstat and sysutils/bubblemon-dockapp on alpha. From miod@
2016-03-30Better support for alphas without all IEEE-mode instructionsAndrew Fresh
From Miod Vallat I trust miod deraadt@
2016-03-01guard macro args with parensmmcc
from Michal Mazurek, ok deraadt@
2016-02-27Rename kdb_trap() into db_ktrap().Martin Pieuchot
The goal is to include it in the list of functions that must not be instrumented. All ddb(8) functions should be in this list and have their names start with 'db_'. ok visa@, deraadt@
2016-02-22put mutex.h lowerTheo de Raadt
2016-02-22Move #include <sys/mutex.h> from pmap.c to pmap.h, like every other archsLandry Breuil
using struct mutex in pmap.h do. Fixes net-snmp on alpha. ok deraadt@
2015-11-07Spell `unused' correctly.Miod Vallat
2015-11-01Remove the definition of USRTEXT. It has no relevance outside of the non-PIEMiod Vallat
a.out world. ok deraadt@ kettenis@
2015-10-01Make the alpha pmap (more) mpsafe by protecting both the pmap itself and theMark Kettenis
pv lists with a mutex. This should make pmap_enter(9), pmap_remove(9) and pmap_page_protect(9) safe to use without holding the kernel lock. This largely reverts rev. 1.75, but now of course the pmap locks are defined to actually call mtx_enter(9) and mtx_leave(9). ok visa@
2015-09-30Use consistant whitespace/comments for #define'ing LABELSECTOR,Kenneth R Westerback
LABELOFFSET and MAXPARTITIONS. Easier on the eye when scanning through all these files. No functional change.
2015-09-26lint is dead and C99 may be old enough to drive a car: delete LONGLONGPhilip Guenther
comments ok millert@
2015-09-13intr_barrier(9) for alpha.Mark Kettenis
2015-08-29_NLIST_DO_ELF is no longer needed: it's the only optionPhilip Guenther
ok deraadt@
2015-07-17Remove {LOAD,COUNT}_TEXTA from libsa loadfile, it only made sense for a.outMiod Vallat
kernels and we no longer have any.
2015-07-02introduce srp, which according to the manpage i wrote is short forDavid Gwynne
"shared reference pointers". srp allows concurrent access to a data structure by multiple cpus while avoiding interlocking cpu opcodes. it manages its own reference counts and the garbage collection of those data structure to avoid use after frees. internally srp is a twisted version of hazard pointers, which are a relative of RCU. jmatthew wrote the bulk of a hazard pointer implementation and changed bpf to use it to allow mpsafe access to bpfilters. however, at s2k15 we were trying to apply it to other data structures but the memory overhead of every hazard pointer would have blown out significantly in several uses cases. a bulk of our time at s2k15 was spent reworking hazard pointers into srp. this diff adds the srp api and adds the necessary metadata to struct cpuinfo on our MP architectures. srp on uniprocessor platforms has alternate code that is optimised because it knows there'll be no concurrent access to data by multiple cpus. srp is made available to the system via param.h, so it should be available everywhere in the kernel. the docs likely need improvement cos im too close to the implementation. ok mpi@
2015-05-29Make ld.so on alpha cope with binaries built with secureplt (where secure hereMiod Vallat
means read-only, which our ld.so already enforced, but a smaller plt section).
2015-05-05emul_native is only used for kernel threads which can't dump core, soPhilip Guenther
delete coredump_trad(), uvm_coredump(), cpu_coredump(), struct md_coredump, and various #includes that are superfluous. This leaves compat_linux processes without a coredump callback. If that ability is desired, someone should update it to use coredump_elf32() and verify the results... ok kettenis@
2015-04-30Remove SIZE_MAX from limits.h. It was added years ago before weTodd C. Miller
had a proper stdint.h. No ports fallout. OK guenther@ miod@
2015-04-17while trying to reproduce lockups on mp alpha i hit anDavid Gwynne
MUTEX_ASSERT_UNLOCKED, but it turns out alpha mutexes arent very friendly to diagnostics on smp systems. alpha mutexes contained an mtx_lock member. when 0 the mutex was unlocked, and when 1 it was locked. the MUTEX_ASSERT_UNLOCKED checked if mtx_lock was 1 to see if the current cpu owned the mutex, but in an mp system another cpu may have set mtx_lock to 1, which causes the assert to fire. this changes alpha mutexes so they record which cpu owns the lock rather than just if the lock is held or not. the diagnostics compare the owner to the current cpus curcpu() address so they can actually tell if the current cpu holds the lock instead of whether any cpu holds the lock. instead of using custom asm to implement a cas this uses atomic_cas_ptr, which on alpha uses gcc cas code. miod says he has far more confidence in the gcc cas than the code that was there before. while im here i also shuffled the code. on MULTIPROCESSOR systems instead of duplicating code between mtx_enter and mtx_enter_try, mtx_enter simply loops on mtx_enter_try until it succeeds. this also provides an alternative implementation of mutexes on !MULTIPROCESSOR systems that avoids interlocking opcodes. mutexes wont contend on UP boxes, theyre basically wrappers around spls. we can just do the splraise, stash the owner as a guard value for DIAGNOSTIC and return. similarly, mtx_enter_try on UP will never fail, so we can just call mtx_enter and return 1. ok miod@
2015-02-15Change pmap_remove_holes() to take a vmspace instead of a map as its argument.Miod Vallat
Use this on vax to correctly pick the end of the stack area now that the stackgap adjustment code will no longer guarantee it is a fixed location.
2015-02-11the only user of __cpu_cas is lock_machdep, so move it there.David Gwynne
machine/lock.h only provides SPINLOCK_SPIN_HOOK which is included directly by the three files that use it.
2015-02-11alpha (nor any other arch) uses any types or api provided by sys/lock.h.David Gwynne
2015-02-11make the rwlock implementation MI.David Gwynne
each arch used to have to provide an rw_cas operation, but now we have the rwlock code build its own version. on smp machines it uses atomic_cas_ulong. on uniproc machines it avoids interlocked instructions by using straight loads and stores. this is safe because rwlocks are only used from process context and processes are currently not preemptible in our kernel. so alpha/ppc/etc might get a benefit. ok miod@ kettenis@ deraadt@
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