SIGCHLD defaulting, PPC spin insn fix

[Roland McGrath]

Hi there again.  I've committed the changes I posted last night.  
Here are a couple more tiny things I turned up so far today:

2002-12-15  Roland McGrath  <roland at redhat.com>

	* strace.c (main) [! USE_PROCFS]: Always reset SIGCHLD to SIG_DFL.

	* util.c [POWERPC] (LOOP): Fix value, now 0x48000000 (0: b 0b).
	Old value was bogus, not even a proper instruction.
	From Guy M. Streeter <streeter at redhat.com>.


Ok to commit?

Thanks,
Roland


Index: strace.c
===================================================================
RCS file: /cvsroot/strace/strace/strace.c,v
retrieving revision 1.31
diff -b -p -u -r1.31 strace.c
--- strace.c	6 Nov 2002 13:17:21 -0000	1.31
+++ strace.c	16 Dec 2002 00:00:52 -0000
@@ -548,6 +548,14 @@ char *argv[];
 #ifdef USE_PROCFS
 	sa.sa_handler = reaper;
 	sigaction(SIGCHLD, &sa, NULL);
+#else
+	/* Make sure SIGCHLD has the default action so that waitpid
+	   definitely works without losing track of children.  The user
+	   should not have given us a bogus state to inherit, but he might
+	   have.  Arguably we should detect SIG_IGN here and pass it on
+	   to children, but probably noone really needs that.  */
+	sa.sa_handler = SIG_DFL;
+	sigaction(SIGCHLD, &sa, NULL);
 #endif /* USE_PROCFS */
 
 	if (trace() < 0)
Index: util.c
===================================================================
RCS file: /cvsroot/strace/strace/util.c,v
retrieving revision 1.30
diff -b -p -u -r1.30 util.c
--- util.c	7 Oct 2002 14:31:12 -0000	1.30
+++ util.c	16 Dec 2002 00:00:53 -0000
@@ -1233,7 +1233,7 @@ struct tcb *tcp;
 #elif defined (ALPHA)
 #define LOOP	0xc3ffffff
 #elif defined (POWERPC)
-#define LOOP	0x0000feeb
+#define LOOP	0x48000000
 #elif defined(ARM)
 #define LOOP	0xEAFFFFFE
 #elif defined(MIPS)