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, 297 insertions, 0 deletions

diff --git a/usr/src/lib/libdwarf/common/pro_reloc_stream.c b/usr/src/lib/libdwarf/common/pro_reloc_stream.c
new file mode 100644
index 0000000000..459779ceda
--- /dev/null
+++ b/usr/src/lib/libdwarf/common/pro_reloc_stream.c
@@ -0,0 +1,297 @@
+/*
+
+  Copyright (C) 2000,2001,2004 Silicon Graphics, Inc.  All Rights Reserved.
+  Portions Copyright 2002-2010 Sun Microsystems, Inc. All rights reserved.
+  Portions Copyright 2008-2010 David Anderson, Inc. 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
+
+*/
+
+
+
+#include "config.h"
+#include "libdwarfdefs.h"
+#include <stdio.h>
+#include <string.h>
+#ifdef HAVE_ELFACCESS_H
+#include <elfaccess.h>
+#else
+/* Set r_info  as defined by ELF generic ABI */
+#define Set_REL32_info(r,s,t) ((r).r_info = ELF32_R_INFO(s,t))
+#define Set_REL64_info(r,s,t) ((r).r_info = ELF64_R_INFO(s,t))
+#endif
+#include "pro_incl.h"
+#include "pro_section.h"
+#include "pro_reloc.h"
+#include "pro_reloc_stream.h"
+
+/*
+        Return DW_DLV_ERROR on malloc error or reltarget_length error.
+        Return DW_DLV_OK otherwise
+
+
+
+*/
+ /*ARGSUSED*/ int
+_dwarf_pro_reloc_name_stream64(Dwarf_P_Debug dbg,
+    int base_sec_index,
+    Dwarf_Unsigned offset,      /* r_offset of reloc */
+    Dwarf_Unsigned symidx,
+    enum Dwarf_Rel_Type type,
+    int reltarget_length)
+{
+#if HAVE_ELF64_GETEHDR
+    REL64 *elf64_reloc = 0;
+    void *relrec_to_fill = 0;
+    int res = 0;
+    int rel_type = 0;
+
+    res = _dwarf_pro_reloc_get_a_slot(dbg, base_sec_index,
+                                      &relrec_to_fill);
+    if (res != DW_DLV_OK)
+        return res;
+
+
+    if (type == dwarf_drt_data_reloc) {
+        if (reltarget_length == dbg->de_offset_size) {
+            rel_type = dbg->de_offset_reloc;
+        } else if (reltarget_length == dbg->de_pointer_size) {
+            rel_type = dbg->de_ptr_reloc;
+        } else {
+            return DW_DLV_ERROR;
+        }
+    } else if (type == dwarf_drt_segment_rel) {
+        rel_type = dbg->de_exc_reloc;
+    } else {
+        /* We are in trouble: improper use of stream relocations.
+           Someone else will diagnose */
+        rel_type = 0;
+    }
+
+    elf64_reloc = (REL64 *)relrec_to_fill;
+    elf64_reloc->r_offset = offset;
+    Set_REL64_info(*elf64_reloc, symidx, rel_type);
+    return DW_DLV_OK;
+#else /* !HAVE_ELF64_GETEHDR */
+    return DW_DLV_ERROR;
+#endif /* #if HAVE_ELF64_GETEHDR */
+}
+
+/*
+        Return DW_DLV_ERROR on malloc error or reltarget_length error.
+        Return DW_DLV_OK otherwise
+        a binary reloc: 32bit ABI
+*/
+int
+_dwarf_pro_reloc_name_stream32(Dwarf_P_Debug dbg, int base_sec_index, 
+    Dwarf_Unsigned offset,      /* r_offset of reloc */
+    Dwarf_Unsigned symidx,
+    enum Dwarf_Rel_Type type,
+    int reltarget_length)
+{
+    REL32 *elf32_reloc = 0;
+    void *relrec_to_fill = 0;
+    int res = 0;
+    int rel_type = 0;
+
+    res = _dwarf_pro_reloc_get_a_slot(dbg, base_sec_index,
+                                      &relrec_to_fill);
+    if (res != DW_DLV_OK)
+        return res;
+    if (type == dwarf_drt_data_reloc) {
+        if (reltarget_length == dbg->de_offset_size) {
+            rel_type = dbg->de_offset_reloc;
+        } else if (reltarget_length == dbg->de_pointer_size) {
+            rel_type = dbg->de_ptr_reloc;
+        } else {
+            return DW_DLV_ERROR;
+        }
+    } else if (type == dwarf_drt_segment_rel) {
+        rel_type = dbg->de_exc_reloc;
+    } else {
+        /* We are in trouble: improper use of stream relocations.
+           Someone else will diagnose */
+        rel_type = 0;
+    }
+
+    elf32_reloc = (REL32*)relrec_to_fill;
+    elf32_reloc->r_offset = (Elf32_Addr) offset;
+    Set_REL32_info(*elf32_reloc, (Dwarf_Word) symidx, rel_type);
+    return DW_DLV_OK;
+
+    /* get a slot, fill in the slot entry */
+}
+
+
+
+/*
+        Return DW_DLV_OK.
+        Never can really do anything: lengths cannot
+        be represented as end-start in a stream.
+
+*/
+ /*ARGSUSED*/ int
+_dwarf_pro_reloc_length_stream(Dwarf_P_Debug dbg, 
+    int base_sec_index, 
+    Dwarf_Unsigned offset,    /* r_offset of reloc */
+    Dwarf_Unsigned start_symidx,
+    Dwarf_Unsigned end_symidx,
+    enum Dwarf_Rel_Type type,
+    int reltarget_length)
+{
+    /* get a slot, fill in the slot entry */
+    return DW_DLV_OK;
+}
+
+
+/* 
+        Ensure each stream is a single buffer and
+        add that single buffer to the set of stream buffers.
+
+        By creating a new buffer and copying if necessary.
+
+        Free the input set of buffers if we consolidate.
+        Return -1 on error (malloc failure)
+
+
+        Return DW_DLV_OK on success. Any other return indicates 
+        malloc failed.
+        
+*/
+int
+_dwarf_stream_relocs_to_disk(Dwarf_P_Debug dbg,
+    Dwarf_Signed * new_sec_count)
+{
+    unsigned long total_size = 0;
+    Dwarf_Small *data = 0;
+    int sec_index = 0;
+    unsigned long i = 0;
+    Dwarf_Error err = 0;
+    Dwarf_Error *error = &err;
+
+    Dwarf_Signed sec_count = 0;
+
+    Dwarf_P_Per_Reloc_Sect p_reloc = &dbg->de_reloc_sect[0];
+
+    for (i = 0; i < NUM_DEBUG_SECTIONS; ++i, ++p_reloc) {
+        unsigned long ct = p_reloc->pr_reloc_total_count;
+        unsigned len = 0;
+        struct Dwarf_P_Relocation_Block_s *p_blk = 0;
+        struct Dwarf_P_Relocation_Block_s *p_blk_last = 0;
+        Dwarf_P_Per_Reloc_Sect prb = 0;
+
+        if (ct == 0) {
+            continue;
+        }
+        prb = &dbg->de_reloc_sect[i];
+        len = dbg->de_relocation_record_size;
+        ++sec_count;
+
+        total_size = ct * len;
+        sec_index = prb->pr_sect_num_of_reloc_sect;
+        if (sec_index == 0) {
+            /* Call de_callback_func or de_callback_func_b, getting 
+               section number of reloc section. */
+            int rel_section_index = 0;
+            Dwarf_Unsigned name_idx = 0;
+            int int_name = 0;
+            int err = 0;
+
+            if (dbg->de_callback_func_b) {
+                rel_section_index =
+                    dbg->de_callback_func_b(_dwarf_rel_section_names[i],
+                                   /* size */
+                                   dbg->de_relocation_record_size,
+                                   /* type */ SHT_REL,
+                                   /* flags */ 0,
+                                   /* link to symtab, which we cannot
+                                      know */ 0,
+                                   /* info == link to sec rels apply to 
+                                    */
+                                   dbg->de_elf_sects[i],
+                                   &name_idx, &err);
+            } else {
+                rel_section_index =
+                    dbg->de_callback_func(_dwarf_rel_section_names[i],
+                                 /* size */
+                                 dbg->de_relocation_record_size,
+                                 /* type */ SHT_REL,
+                                 /* flags */ 0,
+                                 /* link to symtab, which we cannot
+                                    know */ 0,
+                                 /* info == link to sec rels apply to */
+                                 dbg->de_elf_sects[i], &int_name, &err);
+                name_idx = int_name;
+            }
+            if (rel_section_index == -1) {
+                {
+                    _dwarf_p_error(dbg, error, DW_DLE_ELF_SECT_ERR);
+                    return (DW_DLV_ERROR);
+                }
+
+            }
+            prb->pr_sect_num_of_reloc_sect = rel_section_index;
+            sec_index = rel_section_index;
+        }
+        GET_CHUNK(dbg, sec_index, data, total_size, &err);
+        p_blk = p_reloc->pr_first_block;
+
+        /* following loop executes at least once. Effects the
+           consolidation to a single block or, if already a single
+           block, simply copies to the output buffer. And frees the
+           input block. The new block is in the de_debug_sects list. */
+        while (p_blk) {
+
+            unsigned long len =
+                p_blk->rb_where_to_add_next - p_blk->rb_data;
+
+            memcpy(data, p_blk->rb_data, len);
+
+
+            data += len;
+
+            p_blk_last = p_blk;
+            p_blk = p_blk->rb_next;
+
+            _dwarf_p_dealloc(dbg, (Dwarf_Small *) p_blk_last);
+        }
+        /* ASSERT: sum of len copied == total_size */
+
+        /* 
+           We have copied the input, now drop the pointers to it. For
+           debugging, leave the other data untouched. */
+        p_reloc->pr_first_block = 0;
+        p_reloc->pr_last_block = 0;
+    }
+
+    *new_sec_count = sec_count;
+    return DW_DLV_OK;
+}