6885 CTF Everywhere Part 1

6886 Want ctfdiff
6887 ctfdump should be written in terms of libctf
6888 ctfmerge should be implemented in terms of libctf
6889 ctfconvert should be implemented in terms of libctf
6890 Want general workq
6891 Want general mergeq
6892 ctf_add_encoded assigns() incorrect byte size to types
6893 ctf_add_{struct,union,enum} can reuse forwards
6894 ctf_add_{struct,union,enum} occasionally forget to dirty the ctf_file_t
6895 ctf_add_member could better handle bitfields
6896 ctf_type_size() reports wrong size for forwards
6897 Want libctf ctf_kind_name() function
6898 Want libctf function to set struct/union size
Portions contributed by: John Levon <john.levon@joyent.com>
Portions contributed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: John Levon <john.levon@joyent.com>
Reviewed by: Andy Fiddaman <andy@omniosce.org>
Reviewed by: Gergő Doma <domag02@gmail.com>
Approved by: Dan McDonald <danmcd@joyent.com>

1 files changed, 259 insertions, 0 deletions

diff --git a/usr/src/lib/libdwarf/common/dwarf_abbrev.c b/usr/src/lib/libdwarf/common/dwarf_abbrev.c
new file mode 100644
index 0000000000..c2ae361f33
--- /dev/null
+++ b/usr/src/lib/libdwarf/common/dwarf_abbrev.c
@@ -0,0 +1,259 @@
+/*
+
+  Copyright (C) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
+  Portions Copyright (C) 2009-2010 David Anderson. All Rights Reserved.
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms of version 2.1 of the GNU Lesser General Public License 
+  as published by the Free Software Foundation.
+
+  This program is distributed in the hope that it would be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
+
+  Further, this software is distributed without any warranty that it is
+  free of the rightful claim of any third person regarding infringement 
+  or the like.  Any license provided herein, whether implied or 
+  otherwise, applies only to this software file.  Patent licenses, if
+  any, provided herein do not apply to combinations of this program with 
+  other software, or any other product whatsoever.  
+
+  You should have received a copy of the GNU Lesser General Public 
+  License along with this program; if not, write the Free Software 
+  Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston MA 02110-1301,
+  USA.
+
+  Contact information:  Silicon Graphics, Inc., 1500 Crittenden Lane,
+  Mountain View, CA 94043, or:
+
+  http://www.sgi.com
+
+  For further information regarding this notice, see:
+
+  http://oss.sgi.com/projects/GenInfo/NoticeExplan
+
+*/
+/* The address of the Free Software Foundation is 
+   Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 
+   Boston, MA 02110-1301, USA.
+   SGI has moved from the above address.
+*/
+
+
+
+
+#include "config.h"
+#include "dwarf_incl.h"
+#include <stdio.h>
+#include "dwarf_abbrev.h"
+
+int
+dwarf_get_abbrev(Dwarf_Debug dbg,
+    Dwarf_Unsigned offset,
+    Dwarf_Abbrev * returned_abbrev,
+    Dwarf_Unsigned * length,
+    Dwarf_Unsigned * abbr_count, Dwarf_Error * error)
+{
+    Dwarf_Small *abbrev_ptr = 0;
+    Dwarf_Small *abbrev_section_end = 0;
+    Dwarf_Half attr = 0;
+    Dwarf_Half attr_form = 0;
+    Dwarf_Abbrev ret_abbrev = 0;
+    Dwarf_Unsigned labbr_count = 0;
+    Dwarf_Unsigned utmp = 0;
+
+
+    if (dbg == NULL) {
+        _dwarf_error(NULL, error, DW_DLE_DBG_NULL);
+        return (DW_DLV_ERROR);
+    }
+    if (dbg->de_debug_abbrev.dss_data == 0) {
+        /* Loads abbrev section (and .debug_info as we do those
+           together). */
+        int res = _dwarf_load_debug_info(dbg, error);
+
+        if (res != DW_DLV_OK) {
+            return res;
+        }
+    }
+
+    if (offset >= dbg->de_debug_abbrev.dss_size) {
+        return (DW_DLV_NO_ENTRY);
+    }
+
+
+    ret_abbrev = (Dwarf_Abbrev) _dwarf_get_alloc(dbg, DW_DLA_ABBREV, 1);
+    if (ret_abbrev == NULL) {
+        _dwarf_error(dbg, error, DW_DLE_ALLOC_FAIL);
+        return (DW_DLV_ERROR);
+    }
+    ret_abbrev->ab_dbg = dbg;
+    if (returned_abbrev == 0 || abbr_count == 0) {
+        dwarf_dealloc(dbg, ret_abbrev, DW_DLA_ABBREV);
+        _dwarf_error(dbg, error, DW_DLE_DWARF_ABBREV_NULL);
+        return (DW_DLV_ERROR);
+    }
+
+
+    *abbr_count = 0;
+    if (length != NULL)
+        *length = 1;
+
+    abbrev_ptr = dbg->de_debug_abbrev.dss_data + offset;
+    abbrev_section_end =
+        dbg->de_debug_abbrev.dss_data + dbg->de_debug_abbrev.dss_size;
+
+    DECODE_LEB128_UWORD(abbrev_ptr, utmp);
+    ret_abbrev->ab_code = (Dwarf_Word) utmp;
+    if (ret_abbrev->ab_code == 0) {
+        *returned_abbrev = ret_abbrev;
+        *abbr_count = 0;
+        if (length) {
+            *length = 1;
+        }
+        return (DW_DLV_OK);
+    }
+
+    DECODE_LEB128_UWORD(abbrev_ptr, utmp);
+    ret_abbrev->ab_tag = utmp;
+    ret_abbrev->ab_has_child = *(abbrev_ptr++);
+    ret_abbrev->ab_abbrev_ptr = abbrev_ptr;
+
+    do {
+        Dwarf_Unsigned utmp2;
+
+        DECODE_LEB128_UWORD(abbrev_ptr, utmp2);
+        attr = (Dwarf_Half) utmp2;
+        DECODE_LEB128_UWORD(abbrev_ptr, utmp2);
+        attr_form = (Dwarf_Half) utmp2;
+
+        if (attr != 0)
+            (labbr_count)++;
+
+    } while (abbrev_ptr < abbrev_section_end &&
+             (attr != 0 || attr_form != 0));
+
+    if (abbrev_ptr > abbrev_section_end) {
+        dwarf_dealloc(dbg, ret_abbrev, DW_DLA_ABBREV);
+        _dwarf_error(dbg, error, DW_DLE_ABBREV_DECODE_ERROR);
+        return (DW_DLV_ERROR);
+    }
+
+    if (length != NULL)
+        *length = abbrev_ptr - dbg->de_debug_abbrev.dss_data - offset;
+
+    *returned_abbrev = ret_abbrev;
+    *abbr_count = labbr_count;
+    return (DW_DLV_OK);
+}
+
+int
+dwarf_get_abbrev_code(Dwarf_Abbrev abbrev,
+    Dwarf_Unsigned * returned_code,
+    Dwarf_Error * error)
+{
+    if (abbrev == NULL) {
+        _dwarf_error(NULL, error, DW_DLE_DWARF_ABBREV_NULL);
+        return (DW_DLV_ERROR);
+    }
+
+    *returned_code = abbrev->ab_code;
+    return (DW_DLV_OK);
+}
+
+/* DWARF defines DW_TAG_hi_user as 0xffff so no tag should be
+   over 16 bits.  */
+int
+dwarf_get_abbrev_tag(Dwarf_Abbrev abbrev,
+    Dwarf_Half * returned_tag, Dwarf_Error * error)
+{
+    if (abbrev == NULL) {
+        _dwarf_error(NULL, error, DW_DLE_DWARF_ABBREV_NULL);
+        return (DW_DLV_ERROR);
+    }
+
+    *returned_tag = abbrev->ab_tag;
+    return (DW_DLV_OK);
+}
+
+
+int
+dwarf_get_abbrev_children_flag(Dwarf_Abbrev abbrev,
+    Dwarf_Signed * returned_flag,
+    Dwarf_Error * error)
+{
+    if (abbrev == NULL) {
+        _dwarf_error(NULL, error, DW_DLE_DWARF_ABBREV_NULL);
+        return (DW_DLV_ERROR);
+    }
+
+    *returned_flag = abbrev->ab_has_child;
+    return (DW_DLV_OK);
+}
+
+
+int
+dwarf_get_abbrev_entry(Dwarf_Abbrev abbrev,
+    Dwarf_Signed index,
+    Dwarf_Half * returned_attr_num,
+    Dwarf_Signed * form,
+    Dwarf_Off * offset, Dwarf_Error * error)
+{
+    Dwarf_Byte_Ptr abbrev_ptr = 0;
+    Dwarf_Byte_Ptr abbrev_end = 0;
+    Dwarf_Byte_Ptr mark_abbrev_ptr = 0;
+    Dwarf_Half attr = 0;
+    Dwarf_Half attr_form = 0;
+
+    if (index < 0)
+        return (DW_DLV_NO_ENTRY);
+
+    if (abbrev == NULL) {
+        _dwarf_error(NULL, error, DW_DLE_DWARF_ABBREV_NULL);
+        return (DW_DLV_ERROR);
+    }
+
+    if (abbrev->ab_code == 0) {
+        return (DW_DLV_NO_ENTRY);
+    }
+
+    if (abbrev->ab_dbg == NULL) {
+        _dwarf_error(NULL, error, DW_DLE_DBG_NULL);
+        return (DW_DLV_ERROR);
+    }
+
+    abbrev_ptr = abbrev->ab_abbrev_ptr;
+    abbrev_end =
+        abbrev->ab_dbg->de_debug_abbrev.dss_data +
+        abbrev->ab_dbg->de_debug_abbrev.dss_size;
+
+    for (attr = 1, attr_form = 1;
+         index >= 0 && abbrev_ptr < abbrev_end && (attr != 0 ||
+             attr_form != 0);
+         index--) {
+        Dwarf_Unsigned utmp4;
+
+        mark_abbrev_ptr = abbrev_ptr;
+        DECODE_LEB128_UWORD(abbrev_ptr, utmp4);
+        attr = (Dwarf_Half) utmp4;
+        DECODE_LEB128_UWORD(abbrev_ptr, utmp4);
+        attr_form = (Dwarf_Half) utmp4;
+    }
+
+    if (abbrev_ptr >= abbrev_end) {
+        _dwarf_error(abbrev->ab_dbg, error, DW_DLE_ABBREV_DECODE_ERROR);
+        return (DW_DLV_ERROR);
+    }
+
+    if (index >= 0) {
+        return (DW_DLV_NO_ENTRY);
+    }
+
+    if (form != NULL)
+        *form = attr_form;
+    if (offset != NULL)
+        *offset = mark_abbrev_ptr - abbrev->ab_dbg->de_debug_abbrev.dss_data;
+
+    *returned_attr_num = (attr);
+    return DW_DLV_OK;
+}