Update.

2000-10-25 David Mosberger <davidm@hpl.hp.com> * sysdeps/unix/sysv/linux/ia64/profil-counter.h: Multiply slot number by four to use bins of width 4 to get accurate instruction-level profiling.
git-mirror · Oct 25, 2000 · 6a39d02 · 6a39d02
1 parent fb9c497
commit 6a39d02
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diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,9 @@
+2000-10-25  David Mosberger  <davidm@hpl.hp.com>
+
+	* sysdeps/unix/sysv/linux/ia64/profil-counter.h: Multiply slot
+	number by four to use bins of width 4 to get accurate
+	instruction-level profiling.
+
 2000-10-25  Andreas Jaeger  <aj@suse.de>
 
 	* sysdeps/generic/dl-cache.h (CACHEMAGIC_VERSION_NEW): Correct string.

diff --git a/sysdeps/unix/sysv/linux/ia64/profil-counter.h b/sysdeps/unix/sysv/linux/ia64/profil-counter.h
@@ -23,5 +23,10 @@
 static void
 profil_counter (int signr, int code, struct sigcontext *scp)
 {
-  profil_count ((void *) scp->sc_ip);
+  unsigned long ip = scp->sc_ip & ~0X3ULL, slot = scp->sc_ip & 0x3ull;
+
+  /* Note: Linux/ia64 encodes the slot number in bits 0 and 1.  We
+     want to multiply the slot number by four so we can use bins of
+     width 4 to get accurate instruction-level profiling.  */
+  profil_count ((void *) (ip + 4*slot));
 }