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* Stop exporting the internal _mcount symbol as that's only referencedguenther2019-10-261-1/+0
| | | | | | | by the ASM stub, which is also in libc. The compiler only generates invocations of the latter. ok mpi@ deraadt@ kettenis@
* Apply retpoline protection to the indirect call to the thread startfuncguenther2019-05-101-2/+7
| | | | ok mortimer@
* Add retguard macros to setjmp/longjmp on amd64. Knocks out some usefulmortimer2019-03-303-21/+33
| | | | | | gadgets from libc. ok deraadt@, kettenis@
* Remove FBSDID.kevlo2019-03-151-4/+1
| | | | ok deraadt@
* In asm.h ensure NENTRY uses the old-school nop-sled align, but change standardderaadt2018-07-101-1/+1
| | | | | | | ENTRY is a trapsled. Fix a few functions which fall-through into an ENTRY macro. amd64 binaries now are free of double+-nop sequences (except for one assember nit in aes-586.pl). Previous changes by guenther got us here. ok mortimer kettenis
* Add retguard macros for libc.mortimer2018-07-0323-23/+72
| | | | ok deraadt
* Clear the sign bit in the QNAN constants used by strtof, strtod and strtold,jmatthew2018-05-281-4/+4
| | | | | | so passing "nan" and "-nan" produces a NaN with the right sign. Bug reported and diff provided by George Koehler. ok kettenis@
* 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@
* clang doesn't propagate attributes like "asm labels" and "visibility(hidden)"guenther2017-11-293-5/+17
| | | | | | | | | to builtins like mem{set,cpy,move} and __stack_smash_handler. So, when building with clang, instead mark those as protected visibility to get rid of the PLT relocations. We can't take the address of them then, but that's ok: it's a build-time error not a run-time error. ok kettenis@
* Don't need .text before ENTRY(), also minor spacing cleanupsderaadt2017-08-192-7/+6
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* Put _map table into .rodata instead of .textderaadt2017-08-191-3/+2
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* Copy files from ../librthread in preparation for moving functionalityguenther2017-08-151-0/+26
| | | | | | | from libpthread to libc. No changes to the build yet, just making it easier to review the substantive diffs. ok beck@ kettenis@ tedu@
* Clang ignores a .weak directive before a function is actually defined. Sokettenis2016-09-102-4/+4
| | | | | | | move it from before ENTRY() to after END(). Keeps brk(2) and sbrk(2) weak when comping libc with clang. ok guenther@
* Remove branch prediction hints from conditional branch instructions. Thesekettenis2016-09-061-3/+3
| | | | | | | hints are not recognized by clang's builtin assembler and the opcode prefixes they generate have been no-ops for all CPUs after the Pentium 4. ok guenther@
* Switch from calling obsolete sig{block,setmask} to directly using theguenther2016-05-292-21/+27
| | | | | | sigprocmask syscall ok kettenis@
* Using a 3-word buffer in the openbsd.randomdata segment, XOR swizzlederaadt2016-05-123-21/+80
| | | | | | the PC/FP/SP registers in the jmpbuf. An old idea (around 1999?) but the random segment sure makes it easy. Lots of help from kettenis ok kettenis
* Remove sigreturn declaration and the now-unused libc syscall stubguenther2016-05-091-57/+0
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* Use a Thread Information Block in both single and multi-threaded programs.guenther2016-05-0710-224/+52
| | | | | | | | | | | | | | | | | 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@
* The asm in the MD_DISABLE_KBIND macro was too fragile and broke alpha and hppa.guenther2016-03-211-26/+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/+26
| | | | | | | | | | | 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@
* "the the" -> "the" in commentmmcc2015-12-111-2/+2
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* Split the non-syscall ASM bits from SYS.h into DEFS.h and use that in theguenther2015-11-1413-41/+80
| | | | | | non-syscall .S source ok millert@ miod@
* 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 libpthreadguenther2015-10-232-4/+6
| | | | | | | | | 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@
* Rename SYSEXIT() to SYSCALL_END() for consistency with most other archs.guenther2015-10-175-25/+14
| | | | | | No change in resulting object files ok millert@
* 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 inguenther2015-09-132-22/+6
| | | | | | | the ASM *setjmp implementations. Skip the PLT when calling them on amd64 (other archs to do this after testing) ok miod@
* Adds hidden _libc_FOO aliases for the system call stubs.guenther2015-09-057-34/+38
| | | | | | | | 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, usingguenther2015-08-3111-31/+53
| | | | | | | | | | | | 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.guenther2015-08-265-81/+12
| | | | | | | 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/+18
| | | | | | | | 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@
* Set FUNC symbol sizes of auto-generated and hand-written syscall wrappers.uebayasi2015-06-1710-14/+40
| | | | | | Original diff from guenther@, adjusted by me. OK guenther@
* Reuse SYSENTRY_HIDDEN() in SYSENTRY(); no functional changes.uebayasi2015-06-121-2/+2
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* Put END() matching _ENTRY() (== ENTRY() w/o prof).uebayasi2015-06-011-1/+2
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* Put END() matching ENTRY().uebayasi2015-06-011-1/+2
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* Put END() where appropriate.uebayasi2015-05-294-10/+12
| | | | While here, kill redundant use of _C_LABEL() in ENTRY().
* Put obvious END() macros that match ENTRY() entries.uebayasi2015-05-2912-12/+51
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* Sprinkle END() in some straightforward *.S files that have ENTRY(). Theuebayasi2015-05-2910-5/+17
| | | | resulting *.o have "FUNC" symbols with size set.
* Make index/rindex weak aliases of strchr/strrchr since they are notmillert2015-05-152-4/+4
| | | | | part of the ISO C standard and have also been dropped from POSIX. OK guenther@ kettenis@
* Eliminate the last uses of *fork's second syscall return register; the pidguenther2015-04-211-3/+3
| | | | | | is zero in the child ok deraadt@ miod@
* Make pthread_atfork() track the DSO that called it like atexit() does,guenther2015-04-072-7/+26
| | | | | | | | | | 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 childguenther2015-03-312-15/+3
| | | | | | | 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@
* remove code for ancient gcc.daniel2015-01-041-7/+1
| | | | ok millert@, kettenis@
* Import new amd64 assembly versions of strchr/index, strrchr/rindex,reyk2014-12-095-95/+442
| | | | | | | | | and strlen that provide a significantly faster performance than our previous .c or .S implementations. Based on NetBSD's code. Tested with different amd64 CPUs. ok deraadt@ mikeb@
* restructure libc/string + libc/arch/*/string coperation regardingderaadt2014-11-309-5/+359
| | | | | | | | | | | | | | | | (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
* One of these optimized stubs creates some incredibly subtle damage,deraadt2014-11-2012-391/+4
| | | | | causing as(1) to create a wrong nop-sled for text segment aligns. Revert, until it is found and fixed.
* Add amd64 assembler versions of some standard functions to libc. Thereyk2014-11-2012-4/+391
| | | | | | | | code is already used in the kernel and the files are unmodified copies from src/sys/lib/libkern/arch/amd64/. Depending on the function, this gives us some speedup in userland. ok deraadt@, no objections from miod@
* 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.hmatthew2014-06-041-11/+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
* add proto for amd64 case; unify otherwisederaadt2013-11-121-2/+4
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