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* Use a trap instruction that unconditionally terminates the process.visa2020-10-201-2/+2
| | | | OK deraadt@
* SYS___threxit cannot fail, but this integration looks like a gadget.deraadt2020-10-181-1/+2
| | | | | Put a hard-trap instruction after the syscall instruction. ok kettenis mortimer
* Userland timecounter implementation for octeonvisa2020-07-181-3/+30
| | | | OK naddy@; no objections from kettenis@
* Add support for timeconting in userland.pirofti2020-07-062-2/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | This diff exposes parts of clock_gettime(2) and gettimeofday(2) to userland via libc eliberating processes from the need for a context switch everytime they want to count the passage of time. If a timecounter clock can be exposed to userland than it needs to set its tc_user member to a non-zero value. Tested with one or multiple counters per architecture. The timing data is shared through a pointer found in the new ELF auxiliary vector AUX_openbsd_timekeep containing timehands information that is frequently updated by the kernel. Timing differences between the last kernel update and the current time are adjusted in userland by the tc_get_timecount() function inside the MD usertc.c file. This permits a much more responsive environment, quite visible in browsers, office programs and gaming (apparently one is are able to fly in Minecraft now). Tested by robert@, sthen@, naddy@, kmos@, phessler@, and many others! OK from at least kettenis@, cheloha@, naddy@, sthen@
* Replace two-operand instruction aliases that clang does notvisa2019-01-051-2/+2
| | | | | | understand with the three-operand instructions. No binary change with gas.
* Instead of trying to handle ffs() with the normal rename-mark-hidden-and-aliasguenther2018-01-181-2/+3
| | | | | | | dance, mark it protected. This works better for both gcc and clang: gcc blocks overriding of internal calls, while clang permits inlining again. ok otto@
* Move SC_* defines into <machine/setjmp.h>, and rename them,visa2018-01-082-158/+158
| | | | | | so that <machine/signal.h> is not needed in setjmp.S. Suggested by kettenis@ long ago, OK deraadt@
* Do not use an uninitialized value when determining the signvisa2017-10-151-4/+4
| | | | | | | | | | of a denormal result of ldexp(3). The bug was found when investigating why denormal results of pow(3) can have an incorrect sign on loongson. pow(3) misbehaviour reported and fix tested by juanfra@ No objection from deraadt@
* Copy files from ../librthread in preparation for moving functionalityguenther2017-08-151-0/+27
| | | | | | | from libpthread to libc. No changes to the build yet, just making it easier to review the substantive diffs. ok beck@ kettenis@ tedu@
* Wrap fpgetround() so internal calls to it (seen on arm, powerpc, and sh)guenther2016-07-261-2/+3
| | | | | | go direct instead of through the PLT. ok millert@ kettenis@
* Consistently reference '_end' instead of 'end' in the brk/sbrk implementationguenther2016-05-303-5/+4
| | | | ok deraadt@
* Do setjmp cookies for gp, sp, and raguenther2016-05-302-26/+58
| | | | | endian testing and ok deraadt@ ok visa@
* Stop supporting longjmperror(); it's not used, not portable, and the checksguenther2016-05-232-6/+2
| | | | | | | longjmp performs can't really be relied upon, even after we got rid of the false positives... ok millert@ deraadt@
* Remove sigreturn declaration and the now-unused libc syscall stubguenther2016-05-091-40/+0
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* Implement longjmp directly and not on top of sigreturn.guenther2016-05-083-98/+125
| | | | | | Use the hidden symbols for internal calls to abort, longjmp, etc ok deraadt@
* Use a Thread Information Block in both single and multi-threaded programs.guenther2016-05-076-57/+37
| | | | | | | | | | | | | | | | | This stores errno, the cancelation flags, and related bits for each thread and is allocated by ld.so or libc.a. This is an ABI break from 5.9-stable! Make libpthread dlopen'able by moving the cancelation wrappers into libc and doing locking and fork/errno handling via callbacks that libpthread registers when it first initializes. 'errno' *must* be declared via <errno.h> now! Clean up libpthread's symbol exports like libc. On powerpc, offset the TIB/TCB/TLS data from the register per the ELF spec. Testing by various, particularly sthen@ and patrick@ ok kettenis@
* Don't need to define SYS_sycall hereguenther2016-03-271-4/+1
| | | | noted by miod@
* The asm in the MD_DISABLE_KBIND macro was too fragile and broke alpha and hppa.guenther2016-03-211-27/+0
| | | | | | So instead, do the kbind disabling with syscall(). debugging and ok deraadt@, ok kettenis@
* Rearrange C runtime bits: now that ld.so exports environ and __progname,guenther2016-03-201-0/+27
| | | | | | | | | | | move their definitions and initialization in static links to libc.a Make crt0 always invoke a new func _csu_finish() in libc to process the auxv and to either register the ld.so cleanup function (in dynamic links) or initialize environ and __progname and do MC_DISABLE_KBIND (in static links). In libc, get pagesize from auxv; cache that between getpagesize() and sysconf(_SC_PAGESIZE) ok mpi@ "good time" deraadt@
* Wrap the remaining math functions in libc: __fpclassify*(), __flt_rounds(),guenther2015-10-273-5/+7
| | | | | | and ldexp(). ok millert@
* Merge the sigaction() and sigprocmask() overloads/wrappers from libpthreadguenther2015-10-234-16/+16
| | | | | | | | | into libc, and move pthread_sigmask() as well (just a trivial wrapper). This provides consistent handling of SIGTHR between single- and multi-threaded programs and is a step in the merge of all the libpthread overloads, providing some ASM and Makefile bits that the other wrappers will need. ok deraadt@ millert@
* Delete an inexplicable commentguenther2015-10-041-2/+2
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* Wrap <stdlib.h> so that calls go direct and the symbols not in theguenther2015-09-132-3/+2
| | | | | | C standard are all weak. Apply __{BEGIN,END}_HIDDEN_DECLS to gdtoa{,imp}.h, hiding the arch-specific __strtorx, __ULtox_D2A, __strtorQ, __ULtoQ_D2A symbols.
* Do provide hidden _libc_* aliases for sig{block,setmask} and use them inguenther2015-09-131-2/+2
| | | | | | | the ASM *setjmp implementations. Skip the PLT when calling them on amd64 (other archs to do this after testing) ok miod@
* This is probably what guenther@ had in mind.miod2015-09-051-2/+2
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* Adds hidden _libc_FOO aliases for the system call stubs.guenther2015-09-054-26/+34
| | | | | | | | Stop generating _brk and _sbrk symbols: they've already been hidden. Set the ELF symbol size on the syscall stubs. Give the __{min,cur}brk symbols a size and type, and hide more jump labels. ok deraadt@
* Add framework for resolving (pun intended) libc namespace issues, usingguenther2015-08-319-25/+50
| | | | | | | | | | | | wrapper .h files and asm labels to let internal calls resolve directly and not be overridable or use the PLT. Then, apply that framework to most of the functions in stdio.h, string.h, err.h, and wchar.h. Delete the should-have-been-hidden-all-along _v?(err|warn)[cx]? symbols while here. tests clean on i386, amd64, sparc64, powerpc, and mips64 naming feedback from kettenis@ and millert@ ok kettenis@
* Hide many (194!) symbols that nothing should be using.guenther2015-08-264-97/+21
| | | | | | | Delete exect(2); it wasn't portable across archs and nothing used it. ports test build by naddy@ ok deraadt@ kettenis@
* Explicitly list the symbols permitted to be exported by libc.guenther2015-08-221-0/+21
| | | | | | | | This is primed with the current list of exported symbols so it doesn't change the ABI yet, but will prevent unintentional additions in the future and sets the stage for reductions. ok deraadt@ kettenis@
* Make index/rindex weak aliases of strchr/strrchr since they are notmillert2015-05-152-4/+6
| | | | | part of the ISO C standard and have also been dropped from POSIX. OK guenther@ kettenis@
* Make pthread_atfork() track the DSO that called it like atexit() does,guenther2015-04-072-3/+19
| | | | | | | | | | unregistering callbacks if the DSO is unloaded. Move the callback handling from libpthread to libc, though libpthread still overrides the inner call to handle locking and thread-library reinitialization. Major version bump for both libc and libpthread. verification that this fixes various ports ajacoutot@ asm assistance miod@; ok millert@ deraadt@
* Simplify fork/vfork logic: the kernel has handled returning zero in the childguenther2015-03-312-53/+4
| | | | | | | for a long time, so there's no need to test the second return register here in the asm stub. ok and testing of many archs by krw@ miod@
* restructure libc/string + libc/arch/*/string coperation regardingderaadt2014-11-303-11/+15
| | | | | | | | | | | | | | | | (potentially) MD versions (function dependent, not filename dependent) split out memcpy/memmove/bcopy and strchr/index/strrchr/rindex Bring back amd64 .S versions And the final touch: switch all architectures temporarily to MI memcpy.c, which contains syslog + abort for overlapping copies. A nice harsh undefined behaviour. We will clean the entire userland of the remaining issues in this catagory, then switch to the optimised memcpy which skips the memmove check. I tried to cut this change into pieces, but testing each sub-step on every architecture is too time consuming and mindnumbing. ok miod
* Switch from <sys/endian.h> or <machine/endian.h> to the new,guenther2014-07-212-5/+4
| | | | | | being-standardized <endian.h> ok deraadt@ millert@ beck@
* Nuke the machinery to sync libkern with libc, it's not been used in themiod2014-06-091-4/+1
| | | | | | last 15 years and there is no point to use it in the future. From Jean-Philippe Ouellet
* Apply "unifdef -D__STDC__" to libc/arch/*/SYS.hmatthew2014-06-041-16/+1
| | | | | | | | A while back, pascal@ converted our system call stubs from using "cpp | as" to "cc -x assembler-with-cpp", so there's no need to stay compatible with ancient preprocessor semantics. ok miod
* remove lint leftovers; ok guenther@okan2012-09-042-4/+2
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* these are no longer used; ok guentherderaadt2012-09-041-57/+0
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* Do not use <machine/float.h>, that is an deformed BSD-ism.deraadt2012-06-251-2/+2
| | | | | It turns out <float.h> is the right file to pull in. ok millert
* __tfork() needs to set the stack address of the new thread in the kernel,guenther2012-06-211-8/+6
| | | | | | | | | so that it can't get a signal while still running on the parent thread's stack. Also, pass in sizeof(struct __tfork) to provide forward compat when more members are added. This is an ABI change, so switch syscall numbers and bump lib majors this time. ok deraadt@ matthew@
* alloca.c cannot be usedderaadt2012-04-121-3/+1
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* remove rfork(); ok guenther miodderaadt2012-04-121-57/+0
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* Move __tfork_thread() from rthreads (libpthread) to libc so thatguenther2012-03-221-0/+80
| | | | | | it can be used for not-strictly-threading purposes ok matthew@ kurt@
* sigstack() is long dead, and the compat sigaltstack syscall is gone too.guenther2011-11-221-2/+2
| | | | | | Correct the namespace protections for sigreturn(), sigwait(), and psignal() ok millert@
* Revert (leaving the complex math part alone). Some stuff is dependingmartynas2011-07-083-2/+119
| | | | | on this historical behavior; so we're stuck in this stupid situation. No cookie for me.
* Kill weak `cerror' alias, it's colliding with the userland namespace. Noticedmiod2011-07-081-2/+1
| | | | by guenther@ months ago, had to wait for a libc major bump.
* Move fabs(3), frexp(3), and modf(3) to libm--nothing has been usingmartynas2011-07-083-119/+2
| | | | them in libc for a very long time. OK guenther@.
* Fix the previous commit: define ___cerror, no __cerrorguenther2011-04-051-4/+4
| | | | tested by otto@; ok miod@
* Move __cerror to ___cerror with a weak alias so that rthreads can override it.guenther2011-04-0412-27/+33
| | | | | | On mips64, also correct the name called from plain cerror to __cerror. "looks correct" miod@
* Provide a WEAK_ALIAS macro in <machine/asm.h> for the few platformsguenther2010-10-011-3/+3
| | | | | | | that didn't already have one, and then immediately use it in libc's SYS.h ok miod@
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