Dmitry Chagin 79262bf1f0 Reimplement futexes. ... Old implemention used Giant to protect the kernel data structures, but at the same time called malloc(M_WAITOK), that could cause the calling thread to sleep and lost Giant protection. User-visible result was the missed wakeup. New implementation uses one sx lock per futex. The sx protects the futex structures and allows to sleep while copyin or copyout are performed. Unlike linux, we return EINVAL when FUTEX_CMP_REQUEUE operation is requested and either caller specified futexes are equial or second futex already exists. This is acceptable since the situation can only occur from the application error, and glibc falls back to old FUTEX_WAKE operation when FUTEX_CMP_REQUEUE returns an error. Approved by: kib (mentor) MFC after: 1 month		2009-05-01 15:36:02 +00:00
..
imgact_linux.c	VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in	2008-01-13 14:44:15 +00:00
linux_dummy.c	Implement robust futexes. Most of the code is modelled after	2008-05-13 20:01:27 +00:00
linux_genassym.c	Segment registers are stored in the uc_mcontext member of the struct	2008-09-07 16:39:21 +00:00
linux_ipc64.h
linux_locore.s	Change some movl's to mov's. Newer GAS no longer accept 'movl' instructions	2009-01-31 11:37:21 +00:00
linux_machdep.c	Adapt linux emulation to use cv for vfork wait.	2009-02-18 16:11:39 +00:00
linux_proto.h	Regenerate system call tables for r184789.	2008-11-09 10:48:06 +00:00
linux_ptrace.c	- Move all of the PS_ flags into either p_flag or td_flags.	2007-09-17 05:31:39 +00:00
linux_support.s	Move futex support code from <arch>/support.s into linux compat directory.	2007-05-23 08:33:06 +00:00
linux_syscall.h	Regenerate system call tables for r184789.	2008-11-09 10:48:06 +00:00
linux_sysent.c	Regenerate system call tables for r184789.	2008-11-09 10:48:06 +00:00
linux_sysvec.c	Reimplement futexes.	2009-05-01 15:36:02 +00:00
linux.h	Add AT_PLATFORM, AT_HWCAP and AT_CLKTCK auxiliary vector entries which	2009-03-04 12:14:33 +00:00
Makefile
syscalls.conf
syscalls.master	Mark uname(), getdomainname() and setdomainname() with COMPAT_FREEBSD4.	2008-11-09 10:45:13 +00:00