Bruce Evans 3764a82377 Simplified PCPU_GET() and PCPU_SET(). We must copy through a temporary ... variable to avoid invalid constraints in dead code. Use an array of u_char's (inside a struct) instead of a char/short/int/long variable so that the variable and its accesses can be spelled in the same way in all cases and code doesn't need to be cloned just to hold the spelling differences. Fixed strict-aliasing errors in PCPU_SET() and in the amd64 PCPU_GET(). Cast to (void *) as in rev.1.37 of the i386 version where the errors were fixed for the i386 PCPU_GET() only. It would be more correct to copy to and from the temp. variable using memcpy(), but then an ifdef tangle would be required to ensure using the builtin memcpy(). We depend on fairly aggressive optimization to put the temp. variable only in a register despite it being copied using *(type *)(void *)&anothertype and could depend on this when using memcpy() too. This seems to work right even for -O0, but the -O0 case has not been completely tested. This change gives identical object code for all object files in LINT on amd64 (except for one file with a __TIME__ stamp). For LINT on i386 it gives unimportant differences in instruction order and padding in a few object files. This was only tested for -O. This change (actually a previous version of it) gives the following reductions in the number of object files in LINT that fail to compile with -O2 but without the -fno-strict-aliasing kludge: - amd64: 29 (down from 211) - i386: 36 (down from 47) gcc-3.4.6 actually allows the invalid constraints that result from not using the temp. variable, at least with -O[1-2], but gcc-3.3.3 crashes on them and I don't want to depend on compiler bugs.		2007-02-06 16:21:09 +00:00
..
pc
_bus.h
_inttypes.h
_limits.h
_stdint.h
_types.h
acpica_machdep.h
apicreg.h
apicvar.h	Newer versions of gcc don't support treating structures passed by value	2006-12-17 06:48:40 +00:00
asm.h
asmacros.h	Removed all traces of HIDENAME() in amd64 and i386 kernel code. Using	2006-10-28 06:04:29 +00:00
atomic.h	Fixed some style bugs (mainly assorted errors in comments, and inconsistent	2006-12-29 15:29:49 +00:00
bus_dma.h
bus.h
clock.h	Cleaned up declaration and initialization of clock_lock. It is only	2007-01-23 08:01:20 +00:00
cpu.h	Clean out sysctl machdep.* related defines.	2006-05-11 17:29:25 +00:00
cpufunc.h
cputypes.h
db_machdep.h
elf.h	PR:	2006-10-04 21:37:10 +00:00
endian.h
exec.h
float.h
floatingpoint.h
fpu.h
frame.h
gdb_machdep.h	Change GDB_BUFSZ to be large enough to hold a register dump where each	2007-02-05 21:48:32 +00:00
ieeefp.h
in_cksum.h
intr_machdep.h	Expand the MSI/MSI-X API to address some deficiencies in the MSI-X support.	2007-01-22 21:48:44 +00:00
iodev.h
kdb.h
legacyvar.h
limits.h
md_var.h	Revert previous change.	2007-01-18 05:46:32 +00:00
memdev.h
metadata.h
minidump.h
mp_watchdog.h
mptable.h
mutex.h	Move clock_lock prototype into <machine/clock.h>, where it is more	2006-05-19 18:53:50 +00:00
param.h
pcb_ext.h
pcb.h
pci_cfgreg.h
pcpu.h	Simplified PCPU_GET() and PCPU_SET(). We must copy through a temporary	2007-02-06 16:21:09 +00:00
pmap.h	Use a different bitmask for superpages' base address so that it	2006-12-05 11:31:33 +00:00
pmc_mdep.h
ppireg.h
proc.h
profile.h	In the userland .mcount():	2006-10-28 13:12:06 +00:00
psl.h
ptrace.h
reg.h	Add support for 8 byte hardware watches in long mode. Kernel hardware	2006-11-17 20:27:01 +00:00
reloc.h
resource.h
runq.h
segments.h
setjmp.h	Remove 3rd clause, renumber, ok per email	2007-01-12 07:26:21 +00:00
sf_buf.h
sigframe.h
signal.h
smp.h	Add a new 'pmap_invalidate_cache()' to flush the CPU caches via the	2006-05-01 21:36:47 +00:00
specialreg.h	Add SSSE3 extensions and correct CNXT-ID spelling for Intel processors.	2007-01-09 19:23:22 +00:00
stdarg.h	Use __builtin_va_start instead of __builtin_stdarg_start. GCC4 obsoletes	2006-09-21 01:37:02 +00:00
sysarch.h
timerreg.h
trap.h
tss.h
ucontext.h
varargs.h
vmparam.h