openbsd/src/lib/libc/include/namespace.h, branch OPENBSD_6_8_BASE

gcc3, like clang and unlike our gcc4, doesn't support redirecting builtins

2019-11-25T22:57:28+00:00

like mem{set,cpy,move} or __stack_smash_handler using asm() renaming. So treat gcc3 like clang and mark such functions as protected instead. ok ayoma@

Complete the ld.so boot cleanup: move most libc initialization from

2019-06-02T01:03:01+00:00

_csu_finish() to _libc_preinit(), which is an .init_array function in shared libc (and mark it INITFIRST) or a .preinit_array function in static libc, grabbing the _dl_cb callback there from ld.so. Then in _csu_finish(), invoke the dl_clean_boot() callback to free ld.so's startup bits before main() gets control. Other cleanups this permits: - move various startup structures into .data.rel.ro - the dl* stubs in libc can be strong and call the callbacks provided via _dl_cb - no longer need to conditionalize dlctl() calls on presence of _DYNAMIC original concept and full diff ok kettenis@ ok deraadt@

Move 'how this works' details from namespace.h to DETAILS

2019-05-13T20:00:32+00:00

Instead of trying to handle ffs() with the normal rename-mark-hidden-and-alias

2018-01-18T08:23:44+00:00

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)"

2017-11-29T05:13:57+00:00

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@

Use a Thread Information Block in both single and multi-threaded programs.

2016-05-07T19:05:22+00:00

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 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@

Update example in comment: setlogin doesn't use {PROTO,DEF}_WRAP() now

2016-04-05T04:28:32+00:00

Merge the sigaction() and sigprocmask() overloads/wrappers from libpthread

2015-10-23T04:39:24+00:00

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@

Wrap blowfish, sha*, md5, and rmd160 so that internal calls go direct

2015-09-11T09:18:27+00:00

ok deraadt@

Pull in namespace.h when building all .c files using gcc's -include option,

2015-09-10T18:13:46+00:00

so that we can provide asm labels for the memcpy/memset/__stack_smash_handler calls that it generates ab initio. Eliminate direct #includes of it. Make sure it's a dependency of all objects (unnecessary for asm, but close enough). ok deraadt@