manu bba80928a8 setcontext() used to be incompatible with -lpthread since it affected ... the TLS pointer, therefore wrecking the pthread environement. Some ports had _UC_TLSBASE flag or equivalent (_UC_UNIQUE on alpha) that controlled whether setcontext() would change the TLS pointer. This change let libpthread override setcontext() with its own version that unsets _UC_TLSBASE, enabling safe usage of setcontext() with -lpthread. We also have the following required changes here: - rename alpha's _UC_UNIQUE into _UC_TLSBASE - add _UC_TLSBASE definition in header file for all ports (powerpc, sh3, sparc and sparc64 lack the implementation for now) - introduce a libc stub that can be overriden for setcontext() - modify MD libcs swapcontext() implementations so that they use the setcontext() libc stub instead of doing a plain system call. While we are there: - document various MD _UC_* flags in header file - add libc and libpthread tests for swapcontext() behavior (hopefully helpful to spot MD problems introduced with this change) Future work: - Deciding whether kernel support or _UC_TLSBASE should be added for powerpc, sh3, sparc and sparc64 is left to portmasters sparc64 Approved by core@		2012-09-12 02:00:51 +00:00
..
adcreg.h
ansi.h	Retire varargs.h support. Move machine/stdarg.h logic into MI	2011-07-17 20:54:30 +00:00
aout_machdep.h
asm.h
bscreg.h
bswap.h
bus_defs.h	Per discussion at	2011-07-01 17:09:58 +00:00
bus_funcs.h	Move some macros back to sh3/include/bus_funcs.h from	2011-07-25 21:12:23 +00:00
byte_swap.h
cache_sh3.h
cache_sh4.h
cache.h
cdefs.h	Change CMSG_SPACE and CMSG_LEN to provide Integer Constant Expressions	2012-01-20 14:08:04 +00:00
clock.h
coff_machdep.h
cpgreg.h
cpu.h
cputypes.h
dacreg.h
db_machdep.h
devreg.h
disklabel.h
dmacreg.h
elf_machdep.h
endian_machdep.h
endian.h
exception.h
float.h
frame.h	Remove COMPAT_SA / KERN_SA. Welcome to 6.99.3!	2012-02-19 21:05:51 +00:00
ieee.h
ieeefp.h
int_const.h
int_fmtio.h
int_limits.h
int_mwgwtypes.h
int_types.h
intcreg.h
intr.h
limits.h	- Normalize inclusion protection (remove)	2012-03-28 17:03:27 +00:00
lock.h
locore.h
Makefile	Do not install bus.h.	2011-07-17 23:52:12 +00:00
math.h
mcontext.h	setcontext() used to be incompatible with -lpthread since it affected	2012-09-12 02:00:51 +00:00
mmu_sh3.h
mmu_sh4.h
mmu.h
mutex.h
param.h	proper sizing of kmem_arena on different ports	2012-02-10 17:35:47 +00:00
pcb.h
pcicreg.h	fix my license notice.	2012-01-21 19:44:28 +00:00
pfcreg.h
pmap.h
pmc.h
proc.h	The MDP_USEDFPU (amd64 and sh3) and MDP_SSTEP (sh3) are lwp flags not	2012-07-08 20:14:11 +00:00
profile.h
psl.h
pte.h
ptrace.h	#if-0'ed defines for PT_GETFPREGS and PT_SETFPREGS. Not used yet, but	2011-10-31 19:08:45 +00:00
reg.h
rtcreg.h
rwlock.h
scifreg.h
scireg.h
setjmp.h
sh_opcode.h
signal.h
tmureg.h
types.h	Switch to new-style <sys/bus.h>.	2011-07-17 23:48:35 +00:00
ubcreg.h
userret.h	The MDP_USEDFPU (amd64 and sh3) and MDP_SSTEP (sh3) are lwp flags not	2012-07-08 20:14:11 +00:00
vmparam.h
wchar_limits.h
wdogvar.h
wdtreg.h