// merge.cc -- handle section merging for gold
-// Copyright 2006, 2007, 2008, 2010 Free Software Foundation, Inc.
+// Copyright (C) 2006-2014 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
Object_merge_map::get_output_offset(const Merge_map* merge_map,
unsigned int shndx,
section_offset_type input_offset,
- section_offset_type *output_offset)
+ section_offset_type* output_offset)
{
Input_merge_map* map = this->get_input_merge_map(shndx);
if (map == NULL
section_offset_type offset, section_size_type length,
section_offset_type output_offset)
{
+ gold_assert(object != NULL);
Object_merge_map* object_merge_map = object->merge_map();
if (object_merge_map == NULL)
{
Output_merge_data::do_add_input_section(Relobj* object, unsigned int shndx)
{
section_size_type len;
- section_size_type uncompressed_size = 0;
- unsigned char* uncompressed_data = NULL;
- const unsigned char* p = object->section_contents(shndx, &len, false);
-
- if (object->section_is_compressed(shndx, &uncompressed_size))
- {
- uncompressed_data = new unsigned char[uncompressed_size];
- if (!decompress_input_section(p, len, uncompressed_data,
- uncompressed_size))
- object->error(_("could not decompress section %s"),
- object->section_name(shndx).c_str());
- p = uncompressed_data;
- len = uncompressed_size;
- }
+ bool is_new;
+ const unsigned char* p = object->decompressed_section_contents(shndx, &len,
+ &is_new);
section_size_type entsize = convert_to_section_size_type(this->entsize());
if (len % entsize != 0)
{
- if (uncompressed_data != NULL)
- delete[] uncompressed_data;
+ if (is_new)
+ delete[] p;
return false;
}
if (this->keeps_input_sections())
record_input_section(object, shndx);
- if (uncompressed_data != NULL)
- delete[] uncompressed_data;
+ if (is_new)
+ delete[] p;
return true;
}
Output_merge_string<Char_type>::do_add_input_section(Relobj* object,
unsigned int shndx)
{
- section_size_type len;
- section_size_type uncompressed_size = 0;
- unsigned char* uncompressed_data = NULL;
- const unsigned char* pdata = object->section_contents(shndx, &len, false);
-
- if (object->section_is_compressed(shndx, &uncompressed_size))
- {
- uncompressed_data = new unsigned char[uncompressed_size];
- if (!decompress_input_section(pdata, len, uncompressed_data,
- uncompressed_size))
- object->error(_("could not decompress section %s"),
- object->section_name(shndx).c_str());
- pdata = uncompressed_data;
- len = uncompressed_size;
- }
+ section_size_type sec_len;
+ bool is_new;
+ const unsigned char* pdata = object->decompressed_section_contents(shndx,
+ &sec_len,
+ &is_new);
const Char_type* p = reinterpret_cast<const Char_type*>(pdata);
- const Char_type* pend = p + len / sizeof(Char_type);
+ const Char_type* pend = p + sec_len / sizeof(Char_type);
+ const Char_type* pend0 = pend;
- if (len % sizeof(Char_type) != 0)
+ if (sec_len % sizeof(Char_type) != 0)
{
object->error(_("mergeable string section length not multiple of "
"character size"));
- if (uncompressed_data != NULL)
- delete[] uncompressed_data;
+ if (is_new)
+ delete[] pdata;
return false;
}
- size_t count = 0;
+ if (pend[-1] != 0)
+ {
+ gold_warning(_("%s: last entry in mergeable string section '%s' "
+ "not null terminated"),
+ object->name().c_str(),
+ object->section_name(shndx).c_str());
+ // Find the end of the last NULL-terminated string in the buffer.
+ while (pend0 > p && pend0[-1] != 0)
+ --pend0;
+ }
Merged_strings_list* merged_strings_list =
new Merged_strings_list(object, shndx);
this->merged_strings_lists_.push_back(merged_strings_list);
Merged_strings& merged_strings = merged_strings_list->merged_strings;
+ // Count the number of non-null strings in the section and size the list.
+ size_t count = 0;
+ const Char_type* pt = p;
+ while (pt < pend0)
+ {
+ size_t len = string_length(pt);
+ if (len != 0)
+ ++count;
+ pt += len + 1;
+ }
+ if (pend0 < pend)
+ ++count;
+ merged_strings.reserve(count + 1);
+
// The index I is in bytes, not characters.
section_size_type i = 0;
- while (i < len)
+
+ // We assume here that the beginning of the section is correctly
+ // aligned, so each string within the section must retain the same
+ // modulo.
+ uintptr_t init_align_modulo = (reinterpret_cast<uintptr_t>(pdata)
+ & (this->addralign() - 1));
+ bool has_misaligned_strings = false;
+
+ while (p < pend0)
{
- const Char_type* pl;
- for (pl = p; *pl != 0; ++pl)
- {
- if (pl >= pend)
- {
- gold_warning(_("%s: last entry in mergeable string section '%s' "
- "not null terminated"),
- object->name().c_str(),
- object->section_name(shndx).c_str());
- break;
- }
- }
+ size_t len = string_length(p);
+
+ // Within merge input section each string must be aligned.
+ if (len != 0
+ && ((reinterpret_cast<uintptr_t>(p) & (this->addralign() - 1))
+ != init_align_modulo))
+ has_misaligned_strings = true;
Stringpool::Key key;
- this->stringpool_.add_with_length(p, pl - p, true, &key);
+ this->stringpool_.add_with_length(p, len, true, &key);
- section_size_type bytelen_with_null = ((pl - p) + 1) * sizeof(Char_type);
merged_strings.push_back(Merged_string(i, key));
+ p += len + 1;
+ i += (len + 1) * sizeof(Char_type);
+ }
+ if (p < pend)
+ {
+ size_t len = pend - p;
+
+ Stringpool::Key key;
+ this->stringpool_.add_with_length(p, len, true, &key);
- p = pl + 1;
- i += bytelen_with_null;
- ++count;
+ merged_strings.push_back(Merged_string(i, key));
+
+ i += (len + 1) * sizeof(Char_type);
}
// Record the last offset in the input section so that we can
merged_strings.push_back(Merged_string(i, 0));
this->input_count_ += count;
+ this->input_size_ += i;
+
+ if (has_misaligned_strings)
+ gold_warning(_("%s: section %s contains incorrectly aligned strings;"
+ " the alignment of those strings won't be preserved"),
+ object->name().c_str(),
+ object->section_name(shndx).c_str());
// For script processing, we keep the input sections.
if (this->keeps_input_sections())
record_input_section(object, shndx);
- if (uncompressed_data != NULL)
- delete[] uncompressed_data;
+ if (is_new)
+ delete[] pdata;
return true;
}
{
char buf[200];
snprintf(buf, sizeof buf, "%s merged %s", section_name, this->string_name());
- fprintf(stderr, _("%s: %s input: %zu\n"),
+ fprintf(stderr, _("%s: %s input bytes: %zu\n"),
+ program_name, buf, this->input_size_);
+ fprintf(stderr, _("%s: %s input strings: %zu\n"),
program_name, buf, this->input_count_);
this->stringpool_.print_stats(buf);
}
projects / platform / upstream / binutils.git / blobdiff