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* libc, libthr: Ditch MD __pthread_distribute_static_tls helpersJessica Clarke2025-05-291-44/+0
| | | | | | | | | | | | | | | | | | _libc_get_static_tls_base() is just _tcb_get() followed by adding (for Variant I) or subtracting (for Variant II) the offset, so just inline that as the implementation (like we do in rtld-elf) rather than having another copy (or equivalent) of _tcb_get()'s assembly. _get_static_tls_base() doesn't even have any MD assembly as it's reading thr->tcb, the only difference is whether to add or subtract, so again just inline that. Whilst here add some missing blank lines to comply with style(9) for elf_utils.c's includes, and use a pointer type rather than uintptr_t to reduce the need to cast, as is done in rtld-elf. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D50592
* Remove residual blank line at start of MakefileWarner Losh2024-07-153-3/+0
| | | | | | | This is a residual of the $FreeBSD$ removal. MFC After: 3 days (though I'll just run the command on the branches) Sponsored by: Netflix
* libc/softfloat: we don't export _fp[gs]et* symbolsBrooks Davis2024-03-132-5/+0
| | | | | | | | | | Remove attempts to use NetBSD __weak_alias macros to export _-prefixed versions of various fp[sg]et* symbols under softfloat. __weak_alias isn't defined so we didn't export them and thus the Symbol.map entries were wrong. Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D44327
* lib{c,sys}: return wrapped syscall APIs to libcBrooks Davis2024-03-131-0/+2
| | | | | | | | | | | | | These provide standard APIs, but are implemented using another system call (e.g., pipe implemented in terms of pipe2) or are interposed by the threading library to support cancelation. After discussion with kib (see D44111), I've concluded that it is better to keep most public interfaces in libc with as little as possible in libsys. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D44241
* libc: move MD sys related symbols to libsysBrooks Davis2024-02-051-5/+0
| | | | | | | This is a mix genuine MD interfaces and compat symbols like _getlogin. Reviewed by: kib, emaste, imp Pull Request: https://github.com/freebsd/freebsd-src/pull/908
* libc: Move per-arch sys/Makefile.inc to libsysBrooks Davis2024-02-051-4/+0
| | | | | | | | | | | | | | | libc/<arch>/sys/Makefile.inc -> libsys/<arch>/Makefile.sys. Require that libsys/<arch>/Makefile.sys exist. At least for current archtiectures, it's not possible for an architecture to not have and MD syscall bits. powerpcspe/Makefile.sys's structure means it had to be modified when moved so rename detection won't work, but it has trivial contents so the history is unimportant. Reviewed by: kib, emaste, imp Pull Request: https://github.com/freebsd/freebsd-src/pull/908
* libc: libc/<arch>/sys/__vdso_gettc -> libsys/<arch>/Brooks Davis2024-02-051-65/+0
| | | | | Reviewed by: kib, emaste, imp Pull Request: https://github.com/freebsd/freebsd-src/pull/908
* libsys: relocate implementations and manpagesBrooks Davis2024-02-052-129/+0
| | | | | | | | | Remove core system call implementations and documentation to lib/libsys and lib/libsys/<arch> from lib/libc/sys and lib/libc/<arch>/<sys>. Update paths to allow libc to find them in their new home. Reviewed by: kib, emaste, imp Pull Request: https://github.com/freebsd/freebsd-src/pull/908
* powerpc/SYS.h: implement _SYSCALL_BODY() macroBrooks Davis2024-01-111-6/+7
| | | | | | | | | Add _SYSCALL_BODY() macro which invokes the syscall via _SYCALL() and calls cerror as required. Use to implement PSEUDO() and RSYSCALL(). Reviewed by: jhibbits Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D43323
* Revert "power*/SYS.h: implement _SYSCALL_BODY() macro"Brooks Davis2023-12-211-7/+6
| | | | | | | bapt reports build errors on powerpc/powerpc so this is the most likely culprit. This reverts commit e88e1272792e41cbf0a5af1f5f0a858afece0475.
* power*/SYS.h: implement _SYSCALL_BODY() macroBrooks Davis2023-12-211-6/+7
| | | | | | | | | Add _SYSCALL_BODY() macro which invokes the syscall via _SYCALL() and calls cerror as required. Use to implement PSEUDO() and RSYSCALL(). Reviewed by: jhibbits Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D43056
* libc/*/SYS.h: remove SYCALL macroBrooks Davis2023-12-121-10/+0
| | | | | | | | | | | This has not been a univerally available interface since it was removed from amd64 by commit efbef97de9805dec95db09953426f0b21bb2964f in 2004. I removed the last consumers in 2016 when I replaced pipe(2) with pipe2(2) in commit b60998c6331e2be21f1fc29fa6c82d94a1f72ef0. Reviewed by: imp, jhibbits Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D42996
* libc: centralize a few numeric symbolsBrooks Davis2023-11-151-3/+0
| | | | | | | | | | | | fabs, __infinity, and __nan are universally implemented so declare them in gen/Symbol.map. We would also include __flt_rounds, but it's under FBSD_1.3 on arm so until that's gone we're stuck with it. Likewise, everyone but i386 implements fp[gs]etmask. Reviewed by: imp, kib, emaste Differential Revision: https://reviews.freebsd.org/D42618
* libc: centralize makecontext symbolsBrooks Davis2023-11-151-2/+0
| | | | | | | | Declare makecontext() and __makecontext() symbols centrally as they are always implemented. Reviewed by: imp, kib Differential Revision: https://reviews.freebsd.org/D42617
* libc: centralize {_,sig,}{set,long}jmp symbolsBrooks Davis2023-11-151-6/+0
| | | | | | | | | These symbols are universally exposed and documented so declare them centrally. Double- and triple-underscore versions exist on some platforms, but leave those alone for now. Reviewed by: imp, kib Differential Revision: https://reviews.freebsd.org/D42616
* libc: centralize ntoh symbolsBrooks Davis2023-11-151-4/+0
| | | | | | | | These are implemented by net/ntoh.c via headers and compiler intrinsics so declare them in net/Symbol.map. Reviewed by: imp, kib, emaste Differential Revision: https://reviews.freebsd.org/D42615
* libc: further centralize syscall symbolsBrooks Davis2023-11-151-4/+0
| | | | | | | | All architectures necessarily implement _exit(2) and vfork(2) so declare them in sys/Symbol.map. Reviewed by: imp, kib, emaste Differential Revision: https://reviews.freebsd.org/D42614
* libc: Remove empty comments in Symbol.mapBrooks Davis2023-11-151-3/+0
| | | | | | | These were left over from $FreeBSD$ removal. Reviewed by: emaste Differential Revision: https://reviews.freebsd.org/D42612
* libc/<arch>/sys/Makefile.inc: remove cruftBrooks Davis2023-11-151-1/+0
| | | | | | | | Remove stray blank lines left over from $FreeBSD$ removal as well as some CVS-era (perhaps pre-repocopy) version comments. Reviewed by: emaste Differential Revision: https://reviews.freebsd.org/D42611
* libc: Purge unneeded cdefs.hWarner Losh2023-11-019-9/+0
| | | | | | | | | These sys/cdefs.h are not needed. Purge them. They are mostly left-over from the $FreeBSD$ removal. A few in libc are still required for macros that cdefs.h defines. Keep those. Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D42385
* Purge more stray embedded $FreeBSD$ stringsJohn Baldwin2023-09-251-5/+0
| | | | | | | These do not use __FBSDID but instead use bare char arrays. Reviewed by: imp, emaste Differential Revision: https://reviews.freebsd.org/D41957
* Remove $FreeBSD$: one-line sh patternWarner Losh2023-08-164-4/+0
| | | | Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/
* Remove $FreeBSD$: one-line .c patternWarner Losh2023-08-1616-33/+0
| | | | Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
* Remove $FreeBSD$: one-line .c comment patternWarner Losh2023-08-163-3/+0
| | | | Remove /^/[*/]\s*\$FreeBSD\$.*\n/
* Remove $FreeBSD$: one-line .h patternWarner Losh2023-08-162-2/+0
| | | | Remove /^\s*\*+\s*\$FreeBSD\$.*$\n/
* Remove $FreeBSD$: two-line .h patternWarner Losh2023-08-165-10/+0
| | | | Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/
* spdx: The BSD-2-Clause-NetBSD identifier is obsolete, drop -NetBSDWarner Losh2023-05-125-5/+5
| | | | | | | | | The SPDX folks have obsoleted the BSD-2-Clause-NetBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
* spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSDWarner Losh2023-05-125-5/+5
| | | | | | | | | The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
* libc: Remove _get_tp() and _set_tp().John Baldwin2021-12-094-88/+1
| | | | | | | | | Their uses have been replaced by _tcb_get() and _tcb_set() from <machine/tls.h>. Reviewed by: kib, jrtc27 Sponsored by: The University of Cambridge, Google Inc. Differential Revision: https://reviews.freebsd.org/D33354
* Add sched_getcpu()Konstantin Belousov2021-11-101-1/+3
| | | | | | | | | for compatibility with Linux. Reviewed by: jhb Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D32901
* libc: add _get_tp() private functionKonstantin Belousov2021-04-092-1/+50
| | | | | | | | which returns pointer to tcb Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D29623
* libc/<arch>/sys/cerror.S: fix typoKonstantin Belousov2021-04-031-1/+1
| | | | | Sponsored by: The FreeBSD Foundation MFC after: 3 days
* [PowerPC] [PowerPCSPE] Fix multiple issues in fpsetmask().Brandon Bergren2021-03-011-3/+3
| | | | | | | | | | | | | | | Building R on powerpc64 exposed a problem in fpsetmask() whereby we were not properly clamping the provided mask to the valid range. This same issue affects powerpc and powerpcspe. Properly limit the range of bits that can be set via fpsetmask(). While here, use the correct fp_except_t type instead of fp_rnd_t. Reported by: pkubaj, jhibbits (in IRC) Sponsored by: Tag1 Consulting, Inc. MFC after: 1 week
* Add CFI start/end proc directives to arm64, i386, and ppcConrad Meyer2020-12-051-2/+4
| | | | | | | | | | | | | | Follow-up to r353959 and r368070: do the same for other architectures. arm32 already seems to use its own .fnstart/.fnend directives, which appear to be ARM-specific variants of the same thing. Likewise, MIPS uses .frame directives. Reviewed by: arichardson Differential Revision: https://reviews.freebsd.org/D27387 Notes: svn path=/head/; revision=368354
* [PowerPC64LE] Fix gdtoa configurations on LE.Brandon Bergren2020-09-231-0/+4
| | | | | | | | | | | | | | | | gdtoa wins the award for "most outdated endianness naming convention" with its IEEE_8087 vs IEEE_MC68k defines. I had a good chuckle. Update softfloat and arith.h to adjust to BE or LE automatically based on the low level preprocessor defines. Fixes printf/scanf on PowerPC64LE, although there is still a problem lurking regarding Signalling NaNs... Sponsored by: Tag1 Consulting, Inc. Notes: svn path=/head/; revision=366054
* [PowerPC] Implement VDSO timebase access on powerpc*Brandon Bergren2020-09-083-2/+69
| | | | | | | | | | | | | | | | | Implement the remaining pieces needed to allow userland timestamp reading. Rewritten based on an intial essay into the problem by Justin Hibbits. (Copyright changed to my own on his request.) Tested on ppc64 (POWER9 Talos II), powerpcspe (e500v2 RB800), and powerpc (g4 PowerBook). Reviewed by: jhibbits (in irc) Sponsored by: Tag1 Consulting, Inc. Differential Revision: https://reviews.freebsd.org/D26347 Notes: svn path=/head/; revision=365442
* [PowerPC] Fix typo in _ctx_start on ppc32Brandon Bergren2019-11-231-1/+1
| | | | | | | | | | | | Theoretically, this was breaking the size calculation for the symbol. Noticed when doing a readthrough. Reviewed by: imp Differential Revision: https://reviews.freebsd.org/D22525 Notes: svn path=/head/; revision=355036
* powerpc: Transition to Secure-PLT, like most other OSsJustin Hibbits2019-06-253-11/+28
| | | | | | | | | | | | | | | | | | | Summary: PowerPC has two PLT models: BSS-PLT and Secure-PLT. BSS-PLT uses runtime code generation to generate the PLT stubs. Secure-PLT was introduced with GCC 4.1 and Binutils 2.17 (base has GCC 4.2.1 and Binutils 2.17), and is a more secure PLT format, using a read-only linkage table, with the dynamic linker populating a non-executable index table. This is the libc, rtld, and kernel support only. The toolchain and build parts will be updated separately. Reviewed By: nwhitehorn, bdragon, pfg Differential Revision: https://reviews.freebsd.org/D20598 MFC after: 1 month Notes: svn path=/head/; revision=349350
* Fix initial exec TLS mode for dynamically loaded shared objects.Konstantin Belousov2019-03-291-0/+46
| | | | | | | | | | | | | | | | | | | | | | | | If dso uses initial exec TLS mode, rtld tries to allocate TLS in static space. If there is no space left, the dlopen(3) fails. If space if allocated, initial content from PT_TLS segment is distributed to all threads' pcbs, which was missed and caused un-initialized TLS segment for such dso after dlopen(3). The mode is auto-detected either due to the relocation used, or if the DF_STATIC_TLS dynamic flag is set. In the later case, the TLS segment is tried to allocate earlier, which increases chance of the dlopen(3) to succeed. LLD was recently fixed to properly emit the flag, ld.bdf did it always. Initial test by: dumbbell Tested by: emaste (amd64), ian (arm) Tested by: Gerald Aryeetey <aryeeteygerald_rogers.com> (arm64) Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D19072 Notes: svn path=/head/; revision=345703
* Remove MD __sys_* private symbols.Brooks Davis2018-12-051-2/+0
| | | | | | | | | | | | | No references to any of these exist in the tree. The list was also erratic with different architectures exporting different things (arm64 and riscv exported none). Reviewed by: kib Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D18425 Notes: svn path=/head/; revision=341509
* Reimplement brk() and sbrk() to avoid the use of _end.Mark Johnston2018-06-044-151/+1
| | | | | | | | | | | | | | | | | | | | | | | | | Previously, libc.so would initialize its notion of the break address using _end, a special symbol emitted by the static linker following the bss section. Compatibility issues between lld and ld.bfd could cause the wrong definition of _end (libc.so's definition rather than that of the executable) to be used, breaking the brk()/sbrk() interface. Avoid this problem and future interoperability issues by simply not relying on _end. Instead, modify the break() system call to return the kernel's view of the current break address, and have libc initialize its state using an extra syscall upon the first use of the interface. As a side effect, this appears to fix brk()/sbrk() usage in executables run with rtld direct exec, since the kernel and libc.so no longer maintain separate views of the process' break address. PR: 228574 Reviewed by: kib (previous version) MFC after: 2 months Differential Revision: https://reviews.freebsd.org/D15663 Notes: svn path=/head/; revision=334626
* Replace MD assembly exect() with a portable version.Brooks Davis2018-04-123-44/+1
| | | | | | | | | | | | | | | | | | | | | | | | | Originally, on the VAX exect() enable tracing once the new executable image was loaded. This was possible because tracing was controllable through user space code by setting the PSL_T flag. The following instruction is a system call that activated tracing (as all instructions do) by copying PSL_T to PSL_TP (trace pending). The first instruction of the new executable image would trigger a trace fault. This is not portable to all platforms and the behavior was replaced with ptrace(PT_TRACE_ME, ...) since FreeBSD forked off of the CSRG repository. Platforms either incorrectly call execve(), trigger trace faults inside the original executable, or do contain an implementation of this function. The exect() interfaces is deprecated or removed on NetBSD and OpenBSD. Submitted by: Ali Mashtizadeh <ali@mashtizadeh.com> Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D14989 Notes: svn path=/head/; revision=332443
* Remove caching from getlogin(2).Brooks Davis2018-04-062-52/+1
| | | | | | | | | | | | | | | | This caching has existed since the CSRG import, but serves no obvious purpose. Sure, setlogin() is called rarely, but calls to getlogin() should also be infrequent. The required invalidation was not implemented on aarch64, arm, mips, amd riscv so updates would never occur if getlogin() was called before setlogin(). Reported by: Ali Mashtizadeh <ali@mashtizadeh.com> Reviewed by: kib Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D14965 Notes: svn path=/head/; revision=332119
* Remove bogus checks against NCARGS.John Baldwin2018-01-311-1/+1
| | | | | | | | | | | | NCARGS isn't a limit on the number of arguments to pass to a function, but the number of bytes that can be consumed by arguments to exec. As such, it is not suitable for a limit on the count of arguments passed to makecontext(). Sponsored by: DARPA / AFRL Notes: svn path=/head/; revision=328631
* libc: further adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-2511-8/+30
| | | | | | | | | | | | | | | Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Notes: svn path=/head/; revision=326193
* General further adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-201-0/+2
| | | | | | | | | | | | | | | | | Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point. Notes: svn path=/head/; revision=326025
* Correct an misunderstanding of MDSRCS.Brooks Davis2017-03-021-1/+1
| | | | | | | | | | | | | | | MDSRCS it intended to allow assembly versions of funtions with C implementations listed in MISRCS. The selection of the correct machdep_ldis?.c for a given architecture does not follow this pattern and the file should be added to SRCS directly. Reviewed by: emaste, imp, jhb MFC after: 1 week Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D9841 Notes: svn path=/head/; revision=314557
* Fix a typo which broke the build for powerpc.Justin Hibbits2016-10-251-1/+1
| | | | | | | | | | It's spelled LIBC_SRCTOP not LIBC_SRC. Pointy-hat to: jhibbits Reported by: kib Notes: svn path=/head/; revision=307892
* Reduce code duplication between powerpc and powerpcspeJustin Hibbits2016-10-222-8/+10
| | | | | | | | They're nearly identical except for a few files. Reported by: kib Notes: svn path=/head/; revision=307799
* Reduce duplicate NOASM and PSEUDO definitionsBrooks Davis2016-09-081-5/+0
| | | | | | | | | | | | | | | | The initial value of NOASM is nearly the same in all cases and the initial value of PSEUDO is the same in all cases so reduce duplication (and hopefully, future merge conflicts) by machine independent defaults. Also document the PSEUDO variable. Reviewed by: jhb, kib Obtained from: CheriBSD Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D7820 Notes: svn path=/head/; revision=305630
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