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, 39 insertions, 7 deletions

diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index cbbb0f6..aec5c24 100644
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -1353,6 +1353,12 @@ typedef struct bfd_section
   /* 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.  */
@@ -1409,6 +1415,9 @@ typedef struct bfd_section
      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;
 
@@ -1642,17 +1651,17 @@ extern asection bfd_ind_section;
   /* 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,                    \
@@ -5062,6 +5071,16 @@ struct bfd
      will be consistent from run to run.  */
 #define BFD_DETERMINISTIC_OUTPUT 0x4000
 
+  /* Compress sections in this BFD.  */
+#define BFD_COMPRESS 0x8000
+
+  /* Decompress sections in this BFD.  */
+#define BFD_DECOMPRESS 0x10000
+
+  /* Flags bits to be saved in bfd_preserve_save.  */
+#define BFD_FLAGS_SAVED \
+  (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS)
+
   /* Currently my_archive is tested before adding origin to
      anything. I believe that this can become always an add of
      origin, with origin set to 0 for non archive files.  */
@@ -5893,8 +5912,21 @@ bfd_byte *bfd_simple_get_relocated_section_contents
    (bfd *abfd, asection *sec, bfd_byte *outbuf, asymbol **symbol_table);
 
 /* Extracted from compress.c.  */
-bfd_boolean bfd_uncompress_section_contents
-   (bfd_byte **buffer, bfd_size_type *size);
+bfd_boolean bfd_compress_section_contents
+   (bfd *abfd, asection *section, bfd_byte *uncompressed_buffer,
+    bfd_size_type uncompressed_size);
+
+bfd_boolean bfd_get_full_section_contents
+   (bfd *abfd, asection *section, bfd_byte **ptr);
+
+bfd_boolean bfd_is_section_compressed
+   (bfd *abfd, asection *section);
+
+bfd_boolean bfd_init_section_decompress_status
+   (bfd *abfd, asection *section);
+
+bfd_boolean bfd_init_section_compress_status
+   (bfd *abfd, asection *section);
 
 #ifdef __cplusplus
 }