Commit MD parts of a loosely functional AMD64 port. This is based on

a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to
attempt to get a stable base to start from.  There is a lot missing still.
Worth noting:
- The kernel runs at 1GB in order to cheat with the pmap code.  pmap uses
  a variation of the PAE code in order to avoid having to worry about 4
  levels of page tables yet.
- It boots in 64 bit "long mode" with a tiny trampoline embedded in the
  i386 loader.  This simplifies locore.s greatly.
- There are still quite a few fragments of i386-specific code that have
  not been translated yet, and some that I cheated and wrote dumb C
  versions of (bcopy etc).
- It has both int 0x80 for syscalls (but using registers for argument
  passing, as is native on the amd64 ABI), and the 'syscall' instruction
  for syscalls.  int 0x80 preserves all registers, 'syscall' does not.
- I have tried to minimize looking at the NetBSD code, except in a couple
  of places (eg: to find which register they use to replace the trashed
  %rcx register in the syscall instruction).  As a result, there is not a
  lot of similarity.  I did look at NetBSD a few times while debugging to
  get some ideas about what I might have done wrong in my first attempt.

1 files changed, 0 insertions, 67 deletions

diff --git a/sys/amd64/include/sigframe.h b/sys/amd64/include/sigframe.h
index 98be731..d104507 100644
--- a/sys/amd64/include/sigframe.h
+++ b/sys/amd64/include/sigframe.h
@@ -34,74 +34,7 @@
 /*
  * Signal frames, arguments passed to application signal handlers.
  */
-#ifdef _KERNEL
-#ifdef COMPAT_43
-struct osigframe {
-	/*
-	 * The first four members may be used by applications.
-	 */
-
-	register_t	sf_signum;
-
-	/*
-	 * Either 'int' for old-style FreeBSD handler or 'siginfo_t *'
-	 * pointing to sf_siginfo for SA_SIGINFO handlers.
-	 */
-	register_t	sf_arg2;
-
-	/* Points to sf_siginfo.si_sc. */
-	register_t	sf_scp;
-
-	register_t	sf_addr;
-
-	/*
-	 * The following arguments are not constrained by the
-	 * function call protocol.
-	 * Applications are not supposed to access these members,
-	 * except using the pointers we provide in the first three
-	 * arguments.
-	 */
-
-	union {
-		__osiginfohandler_t	*sf_action;
-		__sighandler_t		*sf_handler;
-	} sf_ahu;
-
-	/* In the SA_SIGINFO case, sf_arg2 points here. */
-	osiginfo_t	sf_siginfo;
-};
-#endif
-#ifdef COMPAT_FREEBSD4
-/* FreeBSD 4.x */
-struct sigframe4 {
-	register_t	sf_signum;
-	register_t	sf_siginfo;	/* code or pointer to sf_si */
-	register_t	sf_ucontext;	/* points to sf_uc */
-	register_t	sf_addr;	/* undocumented 4th arg */
-
-	union {
-		__siginfohandler_t	*sf_action;
-		__sighandler_t		*sf_handler;
-	} sf_ahu;
-	struct ucontext4 sf_uc;		/* = *sf_ucontext */
-	siginfo_t	sf_si;		/* = *sf_siginfo (SA_SIGINFO case) */
-};
-#endif
-#endif
-
 struct sigframe {
-	/*
-	 * The first four members may be used by applications.
-	 *
-	 * NOTE: The 4th argument is undocumented, ill commented
-	 * on and seems to be somewhat BSD "standard".  Handlers
-	 * installed with sigvec may be using it.
-	 */
-	register_t	sf_signum;
-	register_t	sf_siginfo;	/* code or pointer to sf_si */
-	register_t	sf_ucontext;	/* points to sf_uc */
-	register_t	sf_addr;	/* undocumented 4th arg */
-
 	union {
 		__siginfohandler_t	*sf_action;
 		__sighandler_t		*sf_handler;