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2016-07-26Wrap fpgetround() so internal calls to it (seen on arm, powerpc, and sh)Philip Guenther
go direct instead of through the PLT. ok millert@ kettenis@
2016-05-30Consistently reference '_end' instead of 'end' in the brk/sbrk implementationPhilip Guenther
ok deraadt@
2016-05-29Only require 4 byte alignment on ILP32 archsPhilip Guenther
2016-05-29Use .balign instead of .align; only need 8 byte alignment not 2^8Philip Guenther
2016-05-22Add XOR cookies for r1 (stack) and lr. Switch from calling obsoletePhilip Guenther
sig{block,setmask} to directly using the sigprocmask syscall. Rewrite sig{set,long}jmp based on {set,long}jmp to avoid the deprecated store/load-multiple instructions. in snaps; ok deraadt@
2016-05-22Oh right, actually delete this now that __cerror is unusedPhilip Guenther
2016-05-15Add END() to match ENTRY() macrosPhilip Guenther
ok kettenis@
2016-05-15TIB conversion is complete, so set errno in the syscall stub and eliminatePhilip Guenther
__cerror ok ketternis@
2016-05-09Remove sigreturn declaration and the now-unused libc syscall stubPhilip Guenther
2016-05-08No, sigaltstack's onstack flag shouldn't be saved. Delete commentPhilip Guenther
wondering about that
2016-05-07Use a Thread Information Block in both single and multi-threaded programs.Philip Guenther
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@
2016-03-21The asm in the MD_DISABLE_KBIND macro was too fragile and broke alpha and hppa.Philip Guenther
So instead, do the kbind disabling with syscall(). debugging and ok deraadt@, ok kettenis@
2016-03-20Rearrange C runtime bits: now that ld.so exports environ and __progname,Philip Guenther
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@
2015-10-27Wrap the remaining math functions in libc: __fpclassify*(), __flt_rounds(),Philip Guenther
and ldexp(). ok millert@
2015-10-23Merge the sigaction() and sigprocmask() overloads/wrappers from libpthreadPhilip Guenther
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@
2015-09-13Do provide hidden _libc_* aliases for sig{block,setmask} and use them inPhilip Guenther
the ASM *setjmp implementations. Skip the PLT when calling them on amd64 (other archs to do this after testing) ok miod@
2015-09-09Backtrack a little bit and don't try to use the per-thread errno location ifMark Kettenis
r2 is zero. Some upcoming changes will probably change the offset at which the errno pointer is stored, or might even store errno directly. Instead, call __errno to get the location of errno. Make sure we go through the PLT such that we call the version in libpthread if it is linked in. Set up r30 for this purpose. The ___cerrno function itself remains protected. ok guenther@
2015-09-05Fix previous: restore a PSEUDO_SUFFIX macro to actually handle errno and returnPhilip Guenther
cone of shame guenther@ ok deraadt@
2015-09-05Adds hidden _libc_FOO aliases for the system call stubs.Philip Guenther
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@
2015-08-31Add framework for resolving (pun intended) libc namespace issues, usingPhilip Guenther
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@
2015-08-27fix commentPhilip Guenther
2015-08-26Hide many (194!) symbols that nothing should be using.Philip Guenther
Delete exect(2); it wasn't portable across archs and nothing used it. ports test build by naddy@ ok deraadt@ kettenis@
2015-08-23Make __cerror() use the per-thread errno location if r2 isn't zero. This wayMark Kettenis
libpthread no longer has to override it which means that we can use a local call and can avoid setting up r30 as a _GLOBAL_OFFSET_TABLE_ pointer, which is hard the way the powerpc ABI works. For now we continue to provide __cerror as a weak symbol, but ___cerror is now protected and internal calls within libc now use ___cerror instead of __cerror. discussed with guenther@
2015-08-23Fetch the _GLOBAL_OFFSET_TABLE_ pointer in a way that's compatible with theMark Kettenis
Secure-PLT ABI.
2015-08-23Set up r30 with the _GLOBAL_OFFSET_TABLE_ pointer as required by theMark Kettenis
Secure-PLT ABI.
2015-08-22Explicitly list the symbols permitted to be exported by libc.Philip Guenther
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@
2015-05-15Make index/rindex weak aliases of strchr/strrchr since they are notTodd C. Miller
part of the ISO C standard and have also been dropped from POSIX. OK guenther@ kettenis@
2015-04-07Make pthread_atfork() track the DSO that called it like atexit() does,Philip Guenther
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@
2015-03-31Simplify fork/vfork logic: the kernel has handled returning zero in the childPhilip Guenther
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@
2014-12-04asm version from libkern, but mempcy() remains tied to theTheo de Raadt
MI syslog_r/abort version for the time being. ok miod
2014-11-30restructure libc/string + libc/arch/*/string coperation regardingTheo de Raadt
(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
2014-07-16zap trailing newlines; "go for it" deraadtOkan Demirmen
2014-06-09Nuke the machinery to sync libkern with libc, it's not been used in theMiod Vallat
last 15 years and there is no point to use it in the future. From Jean-Philippe Ouellet
2014-06-04Apply "unifdef -D__STDC__" to libc/arch/*/SYS.hMatthew Dempsky
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
2014-04-17It's been a quarter century: we can assume volatile is present with that name.Philip Guenther
2013-03-28Switch libc and libm to use strong aliases rather than weak aliasesMartynas Venckus
where appropriate. Among other things makes the symbols consistent across all architectures (notably where ldbl mantissa is 53 bits). While at it, kill unused LINTLIBRARY/PROTOLIB1 cruft which was there to trick lint into recording the right prototypes for aliased functions. Most of the work done at the awesome n2k13 hackathon. Agreed by kettenis@, guenther@, matthew@.
2012-12-05Remove excessive sys/cdefs.h inclusionTheo de Raadt
ok guenther millert kettenis
2012-09-04these are no longer used; ok guentherTheo de Raadt
2012-08-22Fix missing PIC -> __PIC__ conversions; ok pascalTheo de Raadt
2012-07-01make this actually workMark Kettenis
ok miod@
2012-06-25Do not use <machine/float.h>, that is an deformed BSD-ism.Theo de Raadt
It turns out <float.h> is the right file to pull in. ok millert
2012-06-21__tfork() needs to set the stack address of the new thread in the kernel,Philip Guenthe
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@
2012-04-12alloca.c cannot be usedTheo de Raadt
2012-04-12remove rfork(); ok guenther miodTheo de Raadt
2012-03-22Move __tfork_thread() from rthreads (libpthread) to libc so thatPhilip Guenthe
it can be used for not-strictly-threading purposes ok matthew@ kurt@
2011-11-22sigstack() is long dead, and the compat sigaltstack syscall is gone too.Philip Guenthe
Correct the namespace protections for sigreturn(), sigwait(), and psignal() ok millert@
2011-07-08Revert (leaving the complex math part alone). Some stuff is dependingMartynas Venckus
on this historical behavior; so we're stuck in this stupid situation. No cookie for me.
2011-07-08Move fabs(3), frexp(3), and modf(3) to libm--nothing has been usingMartynas Venckus
them in libc for a very long time. OK guenther@.
2011-05-25On PowerPC we cannot manipulate FPSCR[VX]--it's a summary of allMartynas Venckus
the invalid exception bits, as described in Section 3.3.6.1.1 of PowerPC Architecture Programming Environments Manual. A proper way to cause an invalid operation exception is to set FPSCR[VXSOFT]. Similarly, we clear all the FPSCR[VX*] bits otherwise.
2011-04-04Move __cerror to ___cerror with a weak alias so that rthreads can override it.Philip Guenthe
On mips64, also correct the name called from plain cerror to __cerror. "looks correct" miod@
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