FreeChainXenon/binutils-gdb
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* compressed_output.cc (zlib_decompress): New function.

Browse source 
(get_uncompressed_size): New function.
	(decompress_input_section): New function.
	* compressed_output.h (get_uncompressed_size): New function.
	(decompress_input_section): New function.
	* dwarf_reader.cc (Sized_dwarf_line_info::Sized_dwarf_line_info)
	Handle compressed debug sections.
	* layout.cc (is_compressed_debug_section): New function.
	(Layout::output_section_name): Map compressed section names to
	canonical names.
	* layout.h (is_compressed_debug_section): New function.
	(is_debug_info_section): Recognize compressed debug sections.
	* merge.cc: Include compressed_output.h.
	(Output_merge_data::do_add_input_section): Handle compressed
	debug sections.
	(Output_merge_string::do_add_input_section): Handle compressed
	debug sections.
	* object.cc: Include compressed_output.h.
	(Sized_relobj::Sized_relobj): Initialize new data members.
	(build_compressed_section_map): New function.
	(Sized_relobj::do_read_symbols): Handle compressed debug sections.
	* object.h (Object::section_is_compressed): New method.
	(Object::do_section_is_compressed): New method.
	(Sized_relobj::Compressed_section_map): New type.
	(Sized_relobj::do_section_is_compressed): New method.
	(Sized_relobj::compressed_sections_): New data member.
	* output.cc (Output_section::add_input_section): Handle compressed
	debug sections.
	* reloc.cc: Include compressed_output.h.
	(Sized_relobj::write_sections): Handle compressed debug sections.
This commit is contained in:
Cary Coutant 2010-07-12 17:59:58 +00:00
parent add265ae41
commit a2e4736229
11 changed files with 358 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

54
gold/object.cc
View file

@ -39,6 +39,7 @@
#include "object.h"
#include "dynobj.h"
#include "plugin.h"
#include "compressed_output.h"
namespace gold
{
@ -367,7 +368,10 @@ Sized_relobj<size, big_endian>::Sized_relobj(
local_got_offsets_(),
kept_comdat_sections_(),
has_eh_frame_(false),
discarded_eh_frame_shndx_(-1U)
discarded_eh_frame_shndx_(-1U),
deferred_layout_(),
deferred_layout_relocs_(),
compressed_sections_()
{
}
@ -495,6 +499,50 @@ Sized_relobj<size, big_endian>::find_eh_frame(
return false;
}
// Build a table for any compressed debug sections, mapping each section index
// to the uncompressed size.
template<int size, bool big_endian>
Compressed_section_map*
build_compressed_section_map(
const unsigned char* pshdrs,
unsigned int shnum,
const char* names,
section_size_type names_size,
Sized_relobj<size, big_endian>* obj)
{
Compressed_section_map* uncompressed_sizes = new Compressed_section_map();
const unsigned int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
const unsigned char* p = pshdrs + shdr_size;
for (unsigned int i = 1; i < shnum; ++i, p += shdr_size)
{
typename elfcpp::Shdr<size, big_endian> shdr(p);
if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
&& (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0)
{
if (shdr.get_sh_name() >= names_size)
{
obj->error(_("bad section name offset for section %u: %lu"),
i, static_cast<unsigned long>(shdr.get_sh_name()));
continue;
}
const char* name = names + shdr.get_sh_name();
if (is_compressed_debug_section(name))
{
section_size_type len;
const unsigned char* contents =
obj->section_contents(i, &len, false);
uint64_t uncompressed_size = get_uncompressed_size(contents, len);
if (uncompressed_size != -1ULL)
(*uncompressed_sizes)[i] =
convert_to_section_size_type(uncompressed_size);
}
}
}
return uncompressed_sizes;
}
// Read the sections and symbols from an object file.
template<int size, bool big_endian>
@ -514,6 +562,10 @@ Sized_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
if (this->find_eh_frame(pshdrs, names, sd->section_names_size))
this->has_eh_frame_ = true;
}
if (memmem(names, sd->section_names_size, ".zdebug_", 8) != NULL)
this->compressed_sections_ =
build_compressed_section_map(pshdrs, this->shnum(), names,
sd->section_names_size, this);
sd->symbols = NULL;
sd->symbols_size = 0;