cinap_lenrek 20b7a19c58 pc64: preserve user extern registers R14 and R15 across syscalls, use Ureg.bp (RARG) for syscall number ... the 6c compiler reserves R14 and R15 for extern register variables, which is used by the kernel to hold the m and up pointers. until now, the meaning of R14 and R15 was undefined for userspace and extern register would not work as the kernel trashes R14 and R15 on syscalls. with this change, user extern registers R14 and R15 are zeroed on exec and otherwise preserved across syscalls. so userspace *could* use them for per process variables like the kernel does. use Ureg.bp (RARG) for syscall number instead of Ureg.ax. this is less confusing and mirrors the amd64 calling convention.		2014-07-20 22:49:02 +02:00
..
doc	/sys/doc: permissions for cleanps, mkdirlist, mkfilelist	2012-10-20 19:09:54 +02:00
games/lib	fortunes: Subject: ftp(1) User-Agent	2014-06-29 15:01:44 -04:00
include	pool: declare pooldump in pool.h. the manual says it is public.	2014-06-09 12:17:45 -07:00
lib	ndb/common: add ipv6-icmp, ipv6-nonxt, ipv6-opts, bootps	2014-07-03 12:03:40 -04:00
man	a.out(6): sync definitions	2014-07-17 23:22:48 -07:00
src	pc64: preserve user extern registers R14 and R15 across syscalls, use Ureg.bp (RARG) for syscall number	2014-07-20 22:49:02 +02:00