7805 want faster clock_gettime

Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Joshua M. Clulow <jmc@joyent.com>
Reviewed by: Ryan Zezeski <rpz@joyent.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Approved by: Garrett D'Amore <garrett@damore.org>

usr/src/cmd/ptools/pargs/pargs.c

@@ -23,7 +23,7 @@
  * Use is subject to license terms.
  */
 /*
- * Copyright (c) 2013, Joyent, Inc.  All rights reserved.
+ * Copyright 2016 Joyent, Inc.
  */
 
 /*
@@ -818,7 +818,8 @@ static struct aux_id aux_arr[] = {
 	{ AT_SUN_BRANDNAME,	"AT_SUN_BRANDNAME",	at_str	},
 	{ AT_SUN_BRAND_AUX1,	"AT_SUN_BRAND_AUX1",	at_null	},
 	{ AT_SUN_BRAND_AUX2,	"AT_SUN_BRAND_AUX2",	at_null	},
-	{ AT_SUN_BRAND_AUX3,	"AT_SUN_BRAND_AUX3",	at_null	}
+	{ AT_SUN_BRAND_AUX3,	"AT_SUN_BRAND_AUX3",	at_null	},
+	{ AT_SUN_COMMPAGE,	"AT_SUN_COMMPAGE",	at_null	}
 };
 
 #define	N_AT_ENTS (sizeof (aux_arr) / sizeof (struct aux_id))

usr/src/cmd/sgs/libconv/common/corenote.c

@@ -25,7 +25,7 @@
  */
 /*
  * Copyright 2012 DEY Storage Systems, Inc.  All rights reserved.
- * Copyright (c) 2013, Joyent, Inc. All rights reserved.
+ * Copyright 2016 Joyent, Inc.
  */
 
 /*
@@ -105,19 +105,20 @@ conv_cnote_auxv_type(Word type, Conv_fmt_flags_t fmt_flags,
 	static const conv_ds_msg_t ds_types_2000_2011 = {
 	    CONV_DS_MSG_INIT(2000, types_2000_2011) };
 
-	static const Msg	types_2014_2023[] = {
+	static const Msg	types_2014_2024[] = {
 		MSG_AUXV_AT_SUN_EXECNAME,	MSG_AUXV_AT_SUN_MMU,
 		MSG_AUXV_AT_SUN_LDDATA,		MSG_AUXV_AT_SUN_AUXFLAGS,
 		MSG_AUXV_AT_SUN_EMULATOR,	MSG_AUXV_AT_SUN_BRANDNAME,
 		MSG_AUXV_AT_SUN_BRAND_AUX1,	MSG_AUXV_AT_SUN_BRAND_AUX2,
 		MSG_AUXV_AT_SUN_BRAND_AUX3,	MSG_AUXV_AT_SUN_HWCAP2,
+		MSG_AUXV_AT_SUN_COMMPAGE
 	};
-	static const conv_ds_msg_t ds_types_2014_2023 = {
-	    CONV_DS_MSG_INIT(2014, types_2014_2023) };
+	static const conv_ds_msg_t ds_types_2014_2024 = {
+	    CONV_DS_MSG_INIT(2014, types_2014_2024) };
 
 	static const conv_ds_t	*ds[] = {
 		CONV_DS_ADDR(ds_types_0_22), CONV_DS_ADDR(ds_types_2000_2011),
-		CONV_DS_ADDR(ds_types_2014_2023), NULL };
+		CONV_DS_ADDR(ds_types_2014_2024), NULL };
 
 	return (conv_map_ds(ELFOSABI_NONE, EM_NONE, type, ds, fmt_flags,
 	    inv_buf));

usr/src/cmd/sgs/libconv/common/corenote.msg

@@ -24,7 +24,7 @@
 # Use is subject to license terms.
 #
 # Copyright 2012 DEY Storage Systems, Inc.  All rights reserved.
-# Copyright (c) 2013, Joyent, Inc. All rights reserved.
+# Copyright 2016 Joyent, Inc.
 #
 
 @ MSG_NT_PRSTATUS		"[ NT_PRSTATUS ]"
@@ -101,6 +101,8 @@
 @ MSG_AUXV_AT_SUN_BRAND_AUX2		"SUN_BRAND_AUX2"
 @ MSG_AUXV_AT_SUN_BRAND_AUX3		"SUN_BRAND_AUX3"
 @ MSG_AUXV_AT_SUN_HWCAP2		"SUN_HWCAP2"
+@ MSG_AUXV_AT_SUN_COMMPAGE		"SUN_COMMPAGE"
+
 
 @ MSG_CC_CONTENT_STACK		"STACK"
 @ MSG_CC_CONTENT_HEAP		"HEAP"

usr/src/cmd/sgs/rtld/common/external.c

@@ -22,7 +22,7 @@
 /*
  * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
- * Copyright 2015 Joyent, Inc.
+ * Copyright 2016 Joyent, Inc.
  */
 
 /*
@@ -721,6 +721,21 @@ isalnum(int c)
 	return ((isalpha(c) || isdigit(c)) ? 1 : 0);
 }
 
+#if defined(__i386) || defined(__amd64)
+/*
+ * Instead of utilizing the comm page for clock_gettime, rtld uses the raw
+ * syscall instead.  Doing so decreases the surface of symbols needed from libc
+ * for a modest performance cost.
+ */
+extern int __clock_gettime_sys(clockid_t, struct timespec *);
+
+int
+__clock_gettime(clockid_t clock_id, struct timespec *tp)
+{
+	return (__clock_gettime_sys(clock_id, tp));
+}
+#endif /* defined(__i386) || defined(__amd64) */
+
 /*
  * In a similar vein to the is* functions above, we also have to define our own
  * version of strerror, as it is implemented in terms of the locale aware

usr/src/lib/commpage/Makefile.shared.com

@@ -0,0 +1,33 @@
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+#
+# Copyright 2016 Joyent, Inc.
+#
+
+#
+# This Makefile is shared between both libc and other consumers
+#
+
+COMMPAGE_OBJS = \
+	cp_subr.o \
+	cp_main.o
+
+COMMPAGE_OFFSETS_SRC = $(SRC)/lib/commpage/common/offsets.in
+COMMPAGE_OFFSETS_H = cp_offsets.h
+
+CLEANFILES += $(COMMPAGE_OFFSETS_H)
+
+pics/cp_main.o := CPPFLAGS += -I$(SRC)/uts/i86pc
+pics/cp_subr.o := ASFLAGS += -I$(SRC)/uts/i86pc -I./
+$(COMMPAGE_OFFSETS_H) := CPPFLAGS += -I$(SRC)/uts/i86pc
+
+COMMPAGE_CPPFLAGS = -I$(SRC)/lib/commpage/common

usr/src/lib/commpage/Makefile.shared.targ

@@ -0,0 +1,29 @@
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+#
+# Copyright 2016 Joyent, Inc.
+#
+
+#
+# This Makefile is shared between both libc and other consumers
+#
+
+pics/%.o: $(SRC)/lib/commpage/common/%.c
+	$(COMPILE.c) -o $@ $<
+	$(POST_PROCESS_O)
+
+pics/%.o: $(SRC)/lib/commpage/$(TARGET_ARCH)/%.s $(COMMPAGE_OFFSETS_H)
+	$(COMPILE.s) -o $@ $<
+	$(POST_PROCESS_O)
+
+$(COMMPAGE_OFFSETS_H): $(COMMPAGE_OFFSETS_SRC)
+	$(OFFSETS_CREATE) <$(COMMPAGE_OFFSETS_SRC) >$@