Split 4.x and 5.x signal handling so that we can keep 4.x signal

handling clean and functional as 5.x evolves.  This allows some of the
nasty bandaids in the 5.x codepaths to be unwound.

Encapsulate 4.x signal handling under COMPAT_FREEBSD4 (there is an
anti-foot-shooting measure in place, 5.x folks need this for a while) and
finish encapsulating the older stuff under COMPAT_43.  Since the ancient
stuff is required on alpha (longjmp(3) passes a 'struct osigcontext *'
to the current sigreturn(2), instead of the 'ucontext_t *' that sigreturn
is supposed to take), add a compile time check to prevent foot shooting
there too.  Add uniform COMPAT_43 stubs for ia64/sparc64/powerpc.

Tested on: i386, alpha, ia64.  Compiled on sparc64 (a few days ago).
Approved by: re

1 files changed, 0 insertions, 21 deletions

diff --git a/sys/powerpc/include/signal.h b/sys/powerpc/include/signal.h
index 55b16dd..c290bb9 100644
--- a/sys/powerpc/include/signal.h
+++ b/sys/powerpc/include/signal.h
@@ -44,28 +44,7 @@
 typedef int sig_atomic_t;
 
 #ifdef _KERNEL
-typedef unsigned int osigset_t;
-
 #include <machine/frame.h>
-
-/*
- * XXX why do we have compatibility structs for a new platform?
- */
-#if defined(__LIBC12_SOURCE__) || defined(_KERNEL)
-struct sigcontext13 {
-	int sc_onstack;			/* saved onstack flag */
-	int sc_mask;			/* saved signal mask (old style) */
-	struct trapframe sc_frame;	/* saved registers */
-};
-#endif /* __LIBC12_SOURCE__ || _KERNEL */
-
-struct osigcontext {
-	int sc_onstack;			/* saved onstack flag */
-	int __sc_mask13;		/* saved signal mask (old style) */
-	struct trapframe sc_frame;	/* saved registers */
-	struct __sigset sc_mask;	/* saved signal mask (new style) */
-};
-
 #endif /* _KERNEL */
 
 #if __BSD_VISIBLE