Add compressed debug section support to binutils and ld.

bfd/

2010-10-29  H.J. Lu  <hongjiu.lu@intel.com>
	    Cary Coutant  <ccoutant@google.com>

	* archive.c (bfd_openr_next_archived_file): Copy BFD_COMPRESS
	and BFD_DECOMPRESS.

	* bfd.c (BFD_COMPRESS): New.
	(BFD_DECOMPRESS): Likewise.
	(BFD_FLAGS_SAVED): Likewise.
	(bfd_preserve_save): Replace BFD_IN_MEMORY with BFD_FLAGS_SAVED.

	* compress.c (bfd_uncompress_section_contents): Removed.
	(get_uncompressed_size): New.
	(decompress_contents): Likewise.
	(bfd_compress_section_contents): Likewise.
	(bfd_get_full_section_contents): Likewise.
	(bfd_is_section_compressed): Likewise.
	(bfd_init_section_decompress_status): Likewise.
	(bfd_init_section_compress_status): Likewise.

	* dwarf2.c (dwarf_debug_sections): New.
	(dwarf_debug_section_enum): Likewise.
	(read_section): Remove section_name and compressed_section_name.
	Add dwarf_debug_section_enum.  Try compressed debug section.
	(read_indirect_string): Updated.
	(read_abbrevs): Likewise.
	(decode_line_info): Likewise.
	(read_debug_ranges): Likewise.
	(find_line): Updated.

	* ecoff.c (bfd_debug_section): Add compress_status and
	compressed_size.

	* elf.c (_bfd_elf_make_section_from_shdr): Call
	bfd_is_section_compressed to check if a DWARF debug section is
	compressed.  Call bfd_init_section_compress_status or
	bfd_init_section_decompress_status if needed.

	* elflink.c (elf_link_input_bfd): Replace bfd_get_section_contents
	with bfd_get_full_section_contents.
	* merge.c (_bfd_add_merge_section): Likewise.
	* reloc.c (bfd_generic_get_relocated_section_contents): Likewise.
	* simple.c (bfd_simple_get_relocated_section_contents): Likewise.

	* elfxx-target.h (TARGET_BIG_SYM): Allow BFD_COMPRESS and
	BFD_DECOMPRESS.
	(TARGET_LITTLE_SYM): Likewise.

	* libbfd-in.h (dwarf_debug_section): New.
	(dwarf_debug_sections): Likewise.

	* libbfd.c (_bfd_generic_get_section_contents): Issue an error
	when getting contents on compressed/decompressed section.

	* section.c (COMPRESS_SECTION_NONE): New.
	(COMPRESS_SECTION_DONE): Likewise.
	(DECOMPRESS_SECTION_SIZED): Likewise.
	(BFD_FAKE_SECTION): Add compress_status and compressed_size.
	(bfd_malloc_and_get_section): Replace bfd_get_section_contents
	with bfd_get_full_section_contents.

	* bfd-in2.h: Regenerated.
	* libbfd.h: Likewise.

binutils/

2010-10-29  H.J. Lu  <hongjiu.lu@intel.com>

	* addr2line.c (process_file): Set BFD_DECOMPRESS.

	* objcopy.c (do_debug_sections): New.
	(OPTION_COMPRESS_DEBUG_SECTIONS): New.
	(OPTION_DECOMPRESS_DEBUG_SECTIONS): Likewise.
	(copy_options): Add OPTION_COMPRESS_DEBUG_SECTIONS and
	OPTION_DECOMPRESS_DEBUG_SECTIONS.
	(copy_usage): Add --compress-debug-sections and
	--decompress-debug-sections.
	(copy_file): Set BFD_COMPRESS or BFD_DECOMPRESS.
	(copy_section): Replace bfd_get_section_contents with
	bfd_get_full_section_contents.
	(copy_main): Handle OPTION_COMPRESS_DEBUG_SECTIONS and
	OPTION_DECOMPRESS_DEBUG_SECTIONS.  Check do_debug_sections to
	rename DWARF debug sections.

	* objdump.c (load_specific_debug_section): Replace
	bfd_get_section_contents with bfd_get_full_section_contents.
	Remove bfd_uncompress_section_contents.
	(dump_section): Replace bfd_get_section_contents with
	bfd_get_full_section_contents.
	(display_file): Set BFD_DECOMPRESS if needed.

	* readelf.c (uncompress_section_contents): Set buffer to NULL
	to indiate decompression failure.
	(load_specific_debug_section): Always call
	uncompress_section_contents.

	* doc/binutils.texi: Document --compress-debug-sections and
	--decompress-debug-sections.

binutils/testsuite/

2010-10-29  H.J. Lu  <hongjiu.lu@intel.com>

	* binutils-all/compress.exp: New.
	* binutils-all/dw2-1.S: Likewise.
	* binutils-all/dw2-2.S: Likewise.
	* binutils-all/libdw2-compressed.out: Likewise.
	* binutils-all/libdw2.out: Likewise.

gas/

2010-10-29  H.J. Lu  <hongjiu.lu@intel.com>

	* write.c (compress_debug): Optimize section flags check.

gas/testsuite/

2010-10-29  H.J. Lu  <hongjiu.lu@intel.com>

	* elf/dwarf2-1.s: Replace .zdebug_abbrev section with
	.debug_abbrev section.
	* elf/dwarf2-2.3: Likewise.

	* elf/dwarf2-1.d: Pass --compress-debug-sections to assembler.
	Updated.
	* elf/dwarf2-2.d: Likewise.

	* gas/i386/i386.exp: Remove xfail on dw2-compress-2 and
	x86-64-dw2-compress-2.

ld/

2010-10-29  H.J. Lu  <hongjiu.lu@intel.com>

	* ldfile.c (ldfile_try_open_bfd): Set BFD_DECOMPRESS after
	bfd_openr returns.
	* emultempl/elf32.em (gld${EMULATION_NAME}_try_needed): Likewise.

	* scripttempl/elf.sc: Include compressed DWARF debug sections.

ld/testsuite/

2010-10-29  H.J. Lu  <hongjiu.lu@intel.com>

	* ld-elf/compress.exp: New.
	* ld-elf/compress1.s: Likewise.
	* ld-elf/compress1a.d: Likewise.
	* ld-elf/compress1b.d: Likewise.
	* ld-elf/compress1c.d: Likewise.

1 files changed, 16 insertions, 19 deletions

diff --git a/bfd/section.c b/bfd/section.c
index 6e13fdb10e..51c2196bc4 100644
--- a/bfd/section.c
+++ b/bfd/section.c
@@ -364,6 +364,12 @@ CODE_FRAGMENT
 .  {* Mark flag used by some linker backends for garbage collection.  *}
 .  unsigned int gc_mark : 1;
 .
+.  {* Section compression status.  *}
+.  unsigned int compress_status : 2;
+.#define COMPRESS_SECTION_NONE    0
+.#define COMPRESS_SECTION_DONE    1
+.#define DECOMPRESS_SECTION_SIZED 2
+.
 .  {* The following flags are used by the ELF linker. *}
 .
 .  {* Mark sections which have been allocated to segments.  *}
@@ -420,6 +426,9 @@ CODE_FRAGMENT
 .     section size calculated on a previous linker relaxation pass.  *}
 .  bfd_size_type rawsize;
 .
+.  {* The compressed size of the section in octets.  *}
+.  bfd_size_type compressed_size;
+.
 .  {* Relaxation table. *}
 .  struct relax_table *relax;
 .
@@ -653,17 +662,17 @@ CODE_FRAGMENT
 .  {* name, id,  index, next, prev, flags, user_set_vma,            *}	\
 .  { NAME,  IDX, 0,     NULL, NULL, FLAGS, 0,				\
 .									\
-.  {* linker_mark, linker_has_input, gc_mark, segment_mark,         *}	\
+.  {* linker_mark, linker_has_input, gc_mark, decompress_status,    *}	\
 .     0,           0,                1,       0,			\
 .									\
-.  {* sec_info_type, use_rela_p,                                    *}	\
-.     0,             0,							\
+.  {* segment_mark, sec_info_type, use_rela_p,                      *}	\
+.     0,            0,             0,					\
 .									\
 .  {* sec_flg0, sec_flg1, sec_flg2, sec_flg3, sec_flg4, sec_flg5,   *}	\
 .     0,        0,        0,        0,        0,        0,		\
 .									\
-.  {* vma, lma, size, rawsize, relax, relax_count,                  *}	\
-.     0,   0,   0,    0,       0,     0,				\
+.  {* vma, lma, size, rawsize, compressed_size, relax, relax_count, *}	\
+.     0,   0,   0,    0,       0,               0,     0,		\
 .									\
 .  {* output_offset, output_section,              alignment_power,  *}	\
 .     0,             (struct bfd_section *) &SEC, 0,			\
@@ -1480,20 +1489,8 @@ DESCRIPTION
 bfd_boolean
 bfd_malloc_and_get_section (bfd *abfd, sec_ptr sec, bfd_byte **buf)
 {
-  bfd_size_type sz = sec->rawsize ? sec->rawsize : sec->size;
-  bfd_byte *p = NULL;
-
-  *buf = p;
-  if (sz == 0)
-    return TRUE;
-
-  p = (bfd_byte *)
-      bfd_malloc (sec->rawsize > sec->size ? sec->rawsize : sec->size);
-  if (p == NULL)
-    return FALSE;
-  *buf = p;
-
-  return bfd_get_section_contents (abfd, sec, p, 0, sz);
+  *buf = NULL;
+  return bfd_get_full_section_contents (abfd, sec, buf);
 }
 /*
 FUNCTION