Add libdtrace support for tracing userland programs.

Summary of changes:
* Implement a compatibility shim between Solaris libproc and our
libproc and remove several ifdefs because of this.
* Port the drti to FreeBSD.
* Implement the missing DOODAD sections
* Link with libproc and librtld_db
* Support for ustack, jstack and uregs (by sson@)
* Misc bugfixing

When writing the SUWN_dof section, we had to resort to building the ELF
file layout by "hand". This is the job of libelf, but our libelf doesn't
support this yet. When libelf is fixed, we can remove the code under
#ifdef BROKEN_LIBELF.

Sponsored by:	The FreeBSD Foundation

3 files changed, 196 insertions, 3 deletions

diff --git a/cddl/lib/libdtrace/Makefile b/cddl/lib/libdtrace/Makefile
index 7e500c7..2cc9564 100644
--- a/cddl/lib/libdtrace/Makefile
+++ b/cddl/lib/libdtrace/Makefile
@@ -18,6 +18,7 @@ SRCS=		dt_aggregate.c \
 		dt_grammar.y \
 		dt_handle.c \
 		dt_ident.c \
+		dt_isadep.c \
 		dt_inttab.c \
 		dt_lex.l \
 		dt_link.c \
@@ -41,7 +42,8 @@ SRCS=		dt_aggregate.c \
 		dt_subr.c \
 		dt_work.c \
 		dt_xlator.c \
-		gmatch.c
+		gmatch.c \
+		dis_tables.c
 
 DSRCS=		errno.d			\
 		psinfo.d		\
@@ -50,7 +52,8 @@ DSRCS=		errno.d			\
 
 WARNS?=		1
 
-CFLAGS+=	-I${.OBJDIR} \
+CFLAGS+=	-I${.OBJDIR} -I${.CURDIR} \
+		-I${.CURDIR}/../../../sys/cddl/dev/dtrace/${MACHINE_ARCH} \
 		-I${.CURDIR}/../../../sys/cddl/compat/opensolaris \
 		-I${.CURDIR}/../../../cddl/compat/opensolaris/include \
 		-I${OPENSOLARIS_USR_DISTDIR}/head \
@@ -61,14 +64,21 @@ CFLAGS+=	-I${.OBJDIR} \
 #CFLAGS+=	-DYYDEBUG
 
 .if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "amd64"
-CFLAGS+=	-I${OPENSOLARIS_SYS_DISTDIR}/uts/intel
+CFLAGS+=	-I${OPENSOLARIS_SYS_DISTDIR}/uts/intel -DDIS_MEM
+.PATH:		${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/i386
+.PATH:		${.CURDIR}/../../../sys/cddl/dev/dtrace/${MACHINE_ARCH}
 .elif ${MACHINE_ARCH} == "sparc64"
 CFLAGS+=	-I${OPENSOLARIS_SYS_DISTDIR}/uts/sparc
+.PATH:		${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/sparc
 .else
 # temporary hack
 CFLAGS+=	-I${OPENSOLARIS_SYS_DISTDIR}/uts/intel
 .endif
 
+.if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "amd64"
+DSRCS+=		regs_x86.d
+.endif
+
 LFLAGS+=-l
 
 YFLAGS+=-d
diff --git a/cddl/lib/libdtrace/libproc_compat.h b/cddl/lib/libdtrace/libproc_compat.h
new file mode 100644
index 0000000..a561157
--- /dev/null
+++ b/cddl/lib/libdtrace/libproc_compat.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2010 The FreeBSD Foundation 
+ * All rights reserved. 
+ * 
+ * This software was developed by Rui Paulo under sponsorship from the
+ * FreeBSD Foundation. 
+ *  
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Compatibility functions between Solaris libproc and FreeBSD libproc.
+ * Functions sorted alphabetically.
+ */
+#define	PR_LMID_EVERY 0
+#define	Psetrun(p, a1, a2) proc_continue((p))
+#define	Pxlookup_by_addr(p, a, n, s, sym, i) \
+    proc_addr2sym(p, a, n, s, sym)
+#define	Pxlookup_by_name(p, l, s1, s2, sym, a) \
+    proc_name2sym((p), (s1), (s2), (sym))
+#define	Paddr_to_map proc_addr2map
+#define	Pcreate_error strerror
+#define	Pdelbkpt proc_bkptdel
+#define	Pgrab_error strerror
+#define	Plmid_to_map(p, l, o) proc_obj2map((p), (o))
+#define	Plookup_by_addr proc_addr2sym
+#define	Pname_to_map proc_name2map
+#define	Pobject_iter proc_iter_objs
+#define	Pobjname proc_objname
+#define	Pread proc_read
+#define	Prd_agent proc_rdagent
+#define	Prelease proc_detach
+#define	Psetbkpt proc_bkptset
+#define	Psetflags proc_setflags
+#define	Pstate proc_state
+#define	Pstate proc_state
+#define	Psymbol_iter_by_addr proc_iter_symbyaddr
+#define	Punsetflags proc_clearflags
+#define	Pupdate_maps(p) do { } while (0)
+#define	Pupdate_syms proc_updatesyms
+#define	Pxecbkpt proc_bkptexec
diff --git a/cddl/lib/libdtrace/regs_x86.d b/cddl/lib/libdtrace/regs_x86.d
new file mode 100644
index 0000000..7dce197
--- /dev/null
+++ b/cddl/lib/libdtrace/regs_x86.d
@@ -0,0 +1,121 @@
+/*                                                                              
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ *
+ * Portions Copyright 2009 Stacey Son sson@FreeBSD.org
+ *
+ * $FreeBSD$
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"@(#)regs.d.in	1.1	04/09/28 SMI"
+
+inline int R_GS = 0;
+#pragma D binding "1.0" R_GS
+inline int R_FS = 1;
+#pragma D binding "1.0" R_FS
+inline int R_ES = 2;
+#pragma D binding "1.0" R_ES
+inline int R_DS = 3;
+#pragma D binding "1.0" R_DS
+
+inline int R_EDI = 4;
+#pragma D binding "1.0" R_EDI
+inline int R_ESI = 5;
+#pragma D binding "1.0" R_ESI
+inline int R_EBP = 6;
+#pragma D binding "1.0" R_EBP
+inline int R_ESP = 7;
+#pragma D binding "1.0" R_ESP
+inline int R_EBX = 8;
+#pragma D binding "1.0" R_EBX
+inline int R_EDX = 9;
+#pragma D binding "1.0" R_EDX
+inline int R_ECX = 10;
+#pragma D binding "1.0" R_ECX
+inline int R_EAX = 11;
+#pragma D binding "1.0" R_EAX
+
+inline int R_TRAPNO = 12;
+#pragma D binding "1.0" R_TRAPNO
+inline int R_ERR = 13;
+#pragma D binding "1.0" R_ERR
+inline int R_EIP = 14;
+#pragma D binding "1.0" R_EIP
+inline int R_CS = 15;
+#pragma D binding "1.0" R_CS
+inline int R_EFL = 16;
+#pragma D binding "1.0" R_EFL
+inline int R_UESP = 17;
+#pragma D binding "1.0" R_UESP
+inline int R_SS = 18;
+#pragma D binding "1.0" R_SS
+
+inline int R_PC = R_EIP;
+#pragma D binding "1.0" R_PC
+inline int R_SP = R_UESP;
+#pragma D binding "1.0" R_SP
+inline int R_PS = R_EFL;
+#pragma D binding "1.0" R_PS
+inline int R_R0 = R_EAX;
+#pragma D binding "1.0" R_R0
+inline int R_R1 = R_EBX;
+#pragma D binding "1.0" R_R1
+
+inline int R_RSP = 18 + 1 + 20;
+#pragma D binding "1.0" R_RSP
+inline int R_RFL = 18 + 1 + 19;
+#pragma D binding "1.0" R_RFL
+inline int R_RIP = 18 + 1 + 17;
+#pragma D binding "1.0" R_RIP
+inline int R_RAX = 18 + 1 + 14;
+#pragma D binding "1.0" R_RAX
+inline int R_RCX = 18 + 1 + 13;
+#pragma D binding "1.0" R_RCX
+inline int R_RDX = 18 + 1 + 12;
+#pragma D binding "1.0" R_RDX
+inline int R_RBX = 18 + 1 + 11;
+#pragma D binding "1.0" R_RBX
+inline int R_RBP = 18 + 1 + 10;
+#pragma D binding "1.0" R_RBP
+inline int R_RSI = 18 + 1 + 9;
+#pragma D binding "1.0" R_RSI
+inline int R_RDI = 18 + 1 + 8;
+#pragma D binding "1.0" R_RDI
+inline int R_R8 = 18 + 1 + 7;
+#pragma D binding "1.0" R_R8
+inline int R_R9 = 18 + 1 + 6;
+#pragma D binding "1.0" R_R9
+inline int R_R10 = 18 + 1 + 5;
+#pragma D binding "1.0" R_R10
+inline int R_R11 = 18 + 1 + 4;
+#pragma D binding "1.0" R_R11
+inline int R_R12 = 18 + 1 + 3;
+#pragma D binding "1.0" R_R12
+inline int R_R13 = 18 + 1 + 2;
+#pragma D binding "1.0" R_R13
+inline int R_R14 = 18 + 1 + 1;
+#pragma D binding "1.0" R_R14
+inline int R_R15 = 18 + 1 + 0;
+#pragma D binding "1.0" R_R15
+