FreeBSD source tree https://cgit-dev.freebsd.org/src-test/atom?h=release%2F5.2.0 2003-07-04T00:05:15Z 2003-07-04T00:05:15Z Jake Burkholder jake@FreeBSD.org 2003-07-04T00:05:15Z urn:sha1:d03721348713ea143ba2919fd425e6f33a8126a6 rtld. When _DYNAMIC is referenced normally from C the global offset table is used implicitly, but newer versions of binutils don't initialize it statically in the binary, so this doesn't work until rtld is relocated, which _DYNAMIC is needed for... So, as on other systems with the same problem, we disassemble a call instruction to _DYNAMIC in order to get its address. 2003-05-29T22:58:26Z Alexander Kabaev kan@FreeBSD.org 2003-05-29T22:58:26Z urn:sha1:6d5d786f800c42ac9eec4ba9ac7202bd184c7242 implementation in case default one provided by rtld is not suitable. Consolidate various identical MD lock implementation into a single file using appropriate machine/atomic.h. Approved by: re (scottl) 2003-03-14T21:10:13Z Alexander Kabaev kan@FreeBSD.org 2003-03-14T21:10:13Z urn:sha1:605f36fc1e6d3d7343da452daffa9c53f72d97e9 return pre-zeroed pages itself. Noticed by: jake 2002-12-05T16:58:31Z Alexander Kabaev kan@FreeBSD.org 2002-12-05T16:58:31Z urn:sha1:f94cc7e9ca492c92e183bb89b7c884fe473583c1 Approved by: re (rwatson) 2002-11-18T22:08:50Z Thomas Moestl tmm@FreeBSD.org 2002-11-18T22:08:50Z urn:sha1:a42a42e9b9cd091de549a3b144e89d7c4b5bc2fd additional arguments to reloc_jmpslot(), which is why MI code and MD code of other platforms had to be changed. Reviewed by: jake Approved by: re 2002-10-09T20:20:43Z Ruslan Ermilov ru@FreeBSD.org 2002-10-09T20:20:43Z urn:sha1:2908cc64ebbfca51f2e70bb385828979f8f10963 Reviewed by: jake, mike 2002-09-14T12:14:24Z Thomas Moestl tmm@FreeBSD.org 2002-09-14T12:14:24Z urn:sha1:a4823075e583c15cd568402ce5b8cc1dbf8b044b crashing. 2002-07-17T22:20:41Z Jake Burkholder jake@FreeBSD.org 2002-07-17T22:20:41Z urn:sha1:b1d6ef2ee9b8259791c9ab089830afabc7715f78 2002-07-06T20:25:56Z John Polstra jdp@FreeBSD.org 2002-07-06T20:25:56Z urn:sha1:e6f0183bfff07d4d2ce3ccdb6460d3bd216e7a62 They provided little benefit (if any) and they caused some problems in OpenOffice, at least in post-KSE -current and perhaps in other environments too. The nanosleep calls prevented the profiling timer from advancing during the spinloops, thereby preventing the thread scheduler from ever pre-empting the spinning thread. Alexander Kabaev diagnosed this problem, Martin Blapp helped with testing, and Matt Dillon provided some helpful suggestions. This is a short-term fix for a larger problem. The use of spinlocking isn't guaranteed to work in all cases. For example, if the spinning thread has higher priority than all other threads, it may never be pre-empted, and the thread holding the lock may never progress far enough to release the lock. On the other hand, spinlocking is the only locking that can work with an arbitrary unknown threads package. I have some ideas for a much better fix in the longer term. It would eliminate all locking inside the dynamic linker by making it safe for symbol lookups and lazy binding to proceed in parallel with a call to dlopen or dlclose. This means that the only mutual exclusion needed would be to prevent multiple simultaneous calls to dlopen and/or dlclose. That mutual exclusion could be put into the native pthreads library. Applications using foreign threads packages would have to make their own arrangements to ensure that they did not have multiple threads in dlopen and/or dlclose -- a reasonable requirement in my opinion. MFC after: 3 days 2002-06-24T05:23:46Z Jake Burkholder jake@FreeBSD.org 2002-06-24T05:23:46Z urn:sha1:cf85da5c68e93d4bdafa8170d2b7b6366b395ac5