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-rw-r--r--libdwarf/pro_reloc_stream.c291
1 files changed, 291 insertions, 0 deletions
diff --git a/libdwarf/pro_reloc_stream.c b/libdwarf/pro_reloc_stream.c
new file mode 100644
index 0000000..74d217b
--- /dev/null
+++ b/libdwarf/pro_reloc_stream.c
@@ -0,0 +1,291 @@
+/*
+
+ Copyright (C) 2000,2001,2004 Silicon Graphics, Inc. All Rights Reserved.
+ Portions Copyright 2002-2010 Sun Microsystems, Inc. All rights reserved.
+ Portions Copyright 2008-2011 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 or _c, 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_c) {
+ rel_section_index =
+ dbg->de_callback_func_c(_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,
+ dbg->de_user_data,
+ &err);
+ } else 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;
+}
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