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Don't change compressed input debug section names 

Change compressed input debug section name for objdump is very confusing.
But we need to change it for linker so that linker will consider the
input section as a debug section.  This patch delays section rename to
elf_fake_sections for objcopy and avoids it for objdump.

bfd/

	PR binutils/18209
	* bfd.c (bfd): Add is_linker_input.
	* elf.c (convert_debug_to_zdebug): New.
	(convert_zdebug_to_debug): Likewise.
	(_bfd_elf_make_section_from_shdr): Don't convert .debug_* to
	.zdebug_* here.  Use convert_zdebug_to_debug.  Set SEC_ELF_RENAME.
	(_bfd_elf_init_reloc_shdr): Pass a pointer to section name
	instead of a pointer to section.
	(elf_fake_sections): Rename the section name if SEC_ELF_RENAME
	is set.
	* section.c (SEC_ELF_RENAME): New.
	* bfd-in2.h: Regenerated.

binutils/

	PR binutils/18209
	* objcopy.c (setup_section): Copy compress status.

binutils/testsuite/

	PR binutils/18209
	* binutils-all/compress.exp: Replace dw2-3.W with dw2-3gabi.W
	on zlib-gabi output.
	* binutils-all/dw2-1.W: Convert section names to .zdebug_*.
	* binutils-all/dw2-3.W: Likewise.
	* binutils-all/objdump.W: Likewise.
	* binutils-all/dw2-3gabi.W: New file.

ld/

	PR binutils/18209
	* ldfile.c (ldfile_try_open_bfd): Set is_linker_input to 1.
This commit is contained in:
H.J. Lu 2015-04-23 07:58:05 -07:00
parent 4ef9fb2f07
commit f6fe1ccd62
15 changed files with 318 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
bfd/ChangeLog
View File

@ -1,3 +1,18 @@
2015-04-23 H.J. Lu <hongjiu.lu@intel.com>
PR binutils/18209
* bfd.c (bfd): Add is_linker_input.
* elf.c (convert_debug_to_zdebug): New.
(convert_zdebug_to_debug): Likewise.
(_bfd_elf_make_section_from_shdr): Don't convert .debug_* to
.zdebug_* here. Use convert_zdebug_to_debug. Set SEC_ELF_RENAME.
(_bfd_elf_init_reloc_shdr): Pass a pointer to section name
instead of a pointer to section.
(elf_fake_sections): Rename the section name if SEC_ELF_RENAME
is set.
* section.c (SEC_ELF_RENAME): New.
* bfd-in2.h: Regenerated.
2015-04-23 Alan Modra <amodra@gmail.com>
* elf64-ppc.c (TOC_BASE_ALIGN): Define.

7
bfd/bfd-in2.h
View File

@ -1400,6 +1400,10 @@ typedef struct bfd_section
TMS320C54X only. */
#define SEC_TIC54X_BLOCK 0x10000000
/* This section should be renamed. This is for ELF linker
internal use only. */
#define SEC_ELF_RENAME 0x10000000
/* Conditionally link this section; do not link if there are no
references found to any symbol in the section. This is for TI
TMS320C54X only. */
@ -6465,6 +6469,9 @@ struct bfd
/* Set if this is the linker output BFD. */
unsigned int is_linker_output : 1;
/* Set if this is the linker input BFD. */
unsigned int is_linker_input : 1;
/* If this is an input for a compiler plug-in library. */
ENUM_BITFIELD (bfd_plugin_format) plugin_format : 2;

3
bfd/bfd.c
View File

@ -212,6 +212,9 @@ CODE_FRAGMENT
. {* Set if this is the linker output BFD. *}
. unsigned int is_linker_output : 1;
.
. {* Set if this is the linker input BFD. *}
. unsigned int is_linker_input : 1;
.
. {* If this is an input for a compiler plug-in library. *}
. ENUM_BITFIELD (bfd_plugin_format) plugin_format : 2;
.

155
bfd/elf.c
View File

@ -855,6 +855,31 @@ bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
return elf_next_in_group (sec) != NULL;
}
static char *
convert_debug_to_zdebug (bfd *abfd, const char *name)
{
unsigned int len = strlen (name);
char *new_name = bfd_alloc (abfd, len + 2);
if (new_name == NULL)
return NULL;
new_name[0] = '.';
new_name[1] = 'z';
memcpy (new_name + 2, name + 1, len);
return new_name;
}
static char *
convert_zdebug_to_debug (bfd *abfd, const char *name)
{
unsigned int len = strlen (name);
char *new_name = bfd_alloc (abfd, len);
if (new_name == NULL)
return NULL;
new_name[0] = '.';
memcpy (new_name + 1, name + 2, len - 1);
return new_name;
}
/* Make a BFD section from an ELF section. We store a pointer to the
BFD section in the bfd_section field of the header. */
@ -1041,7 +1066,6 @@ _bfd_elf_make_section_from_shdr (bfd *abfd,
|| (name[1] == 'z' && name[7] == '_')))
{
enum { nothing, compress, decompress } action = nothing;
char *new_name;
int compression_header_size;
bfd_boolean compressed
= bfd_is_section_compressed_with_header (abfd, newsect,
@ -1090,42 +1114,26 @@ _bfd_elf_make_section_from_shdr (bfd *abfd,
}
}
new_name = NULL;
if (action == decompress
|| (action == compress
&& (abfd->flags & BFD_COMPRESS_GABI) != 0))
if (abfd->is_linker_input)
{
if (name[1] == 'z')
if (name[1] == 'z'
&& (action == decompress
|| (action == compress
&& (abfd->flags & BFD_COMPRESS_GABI) != 0)))
{
unsigned int len = strlen (name);
new_name = bfd_alloc (abfd, len);
/* Convert section name from .zdebug_* to .debug_* so
that linker will consider this section as a debug
section. */
char *new_name = convert_zdebug_to_debug (abfd, name);
if (new_name == NULL)
return FALSE;
new_name[0] = '.';
memcpy (new_name + 1, name + 2, len - 1);
bfd_rename_section (abfd, newsect, new_name);
}
}
else if (action == compress
&& newsect->compress_status == COMPRESS_SECTION_DONE)
{
/* PR binutils/18087: Compression does not always make a section
smaller. So only rename the section when compression has
actually taken place. */
if (name[1] != 'z')
{
unsigned int len = strlen (name);
new_name = bfd_alloc (abfd, len + 2);
if (new_name == NULL)
return FALSE;
new_name[0] = '.';
new_name[1] = 'z';
memcpy (new_name + 2, name + 1, len);
}
}
if (new_name != NULL)
bfd_rename_section (abfd, newsect, new_name);
else
/* For objdump, don't rename the section. For objcopy, delay
section rename to elf_fake_sections. */
newsect->flags |= SEC_ELF_RENAME;
}
return TRUE;
@ -2689,7 +2697,7 @@ _bfd_elf_single_rel_hdr (asection *sec)
static bfd_boolean
_bfd_elf_init_reloc_shdr (bfd *abfd,
struct bfd_elf_section_reloc_data *reldata,
asection *asect,
const char *sec_name,
bfd_boolean use_rela_p)
{
Elf_Internal_Shdr *rel_hdr;
@ -2702,11 +2710,11 @@ _bfd_elf_init_reloc_shdr (bfd *abfd,
rel_hdr = bfd_zalloc (abfd, amt);
reldata->hdr = rel_hdr;
amt = sizeof ".rela" + strlen (asect->name);
amt = sizeof ".rela" + strlen (sec_name);
name = (char *) bfd_alloc (abfd, amt);
if (name == NULL)
return FALSE;
sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", sec_name);
rel_hdr->sh_name =
(unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
FALSE);
@ -2763,33 +2771,66 @@ elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
this_hdr = &esd->this_hdr;
/* For linking, compress DWARF debug sections with names: .debug_*. */
if (arg->link_info
&& (arg->link_info->compress_debug & COMPRESS_DEBUG)
&& (asect->flags & SEC_DEBUGGING)
&& name[1] == 'd'
&& name[6] == '_')
if (arg->link_info)
{
/* Set SEC_ELF_COMPRESS to indicate this section should be
compressed. */
asect->flags |= SEC_ELF_COMPRESS;
if (arg->link_info->compress_debug != COMPRESS_DEBUG_GABI_ZLIB)
/* ld: compress DWARF debug sections with names: .debug_*. */
if ((arg->link_info->compress_debug & COMPRESS_DEBUG)
&& (asect->flags & SEC_DEBUGGING)
&& name[1] == 'd'
&& name[6] == '_')
{
/* If SHF_COMPRESSED isn't used, rename compressed DWARF
debug section to .zdebug_*. */
unsigned int len = strlen (name);
char *new_name = bfd_alloc (abfd, len + 2);
/* Set SEC_ELF_COMPRESS to indicate this section should be
compressed. */
asect->flags |= SEC_ELF_COMPRESS;
if (arg->link_info->compress_debug != COMPRESS_DEBUG_GABI_ZLIB)
{
/* If SHF_COMPRESSED isn't used, rename compressed DWARF
debug section to .zdebug_*. */
char *new_name = convert_debug_to_zdebug (abfd, name);
if (new_name == NULL)
{
arg->failed = TRUE;
return;
}
bfd_rename_section (abfd, asect, new_name);
name = asect->name;
}
}
}
else if ((asect->flags & SEC_ELF_RENAME))
{
/* objcopy: rename output DWARF debug section. */
if ((abfd->flags & (BFD_DECOMPRESS | BFD_COMPRESS_GABI)))
{
/* When we decompress or compress with SHF_COMPRESSED,
convert section name from .zdebug_* to .debug_* if
needed. */
if (name[1] == 'z')
{
char *new_name = convert_zdebug_to_debug (abfd, name);
if (new_name == NULL)
{
arg->failed = TRUE;
return;
}
name = new_name;
}
}
else if (asect->compress_status == COMPRESS_SECTION_DONE)
{
/* PR binutils/18087: Compression does not always make a
section smaller. So only rename the section when
compression has actually taken place. If input section
name is .zdebug_*, we should never compress it again. */
char *new_name = convert_debug_to_zdebug (abfd, name);
if (new_name == NULL)
{
arg->failed = TRUE;
return;
}
new_name[0] = '.';
new_name[1] = 'z';
memcpy (new_name + 2, name + 1, len);
bfd_rename_section (abfd, asect, new_name);
name = asect->name;
BFD_ASSERT (name[1] != 'z');
name = new_name;
}
}
@ -2972,13 +3013,13 @@ elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
&& (arg->link_info->relocatable || arg->link_info->emitrelocations))
{
if (esd->rel.count && esd->rel.hdr == NULL
&& !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, asect, FALSE))
&& !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, name, FALSE))
{
arg->failed = TRUE;
return;
}
if (esd->rela.count && esd->rela.hdr == NULL
&& !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, asect, TRUE))
&& !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, name, TRUE))
{
arg->failed = TRUE;
return;
@ -2987,7 +3028,7 @@ elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
else if (!_bfd_elf_init_reloc_shdr (abfd,
(asect->use_rela_p
? &esd->rela : &esd->rel),
asect,
name,
asect->use_rela_p))
arg->failed = TRUE;
}

4
bfd/section.c
View File

@ -345,6 +345,10 @@ CODE_FRAGMENT
. TMS320C54X only. *}
.#define SEC_TIC54X_BLOCK 0x10000000
.
. {* This section should be renamed. This is for ELF linker
. internal use only. *}
.#define SEC_ELF_RENAME 0x10000000
.
. {* Conditionally link this section; do not link if there are no
. references found to any symbol in the section. This is for TI
. TMS320C54X only. *}

5
binutils/ChangeLog
View File

@ -1,3 +1,8 @@
2015-04-23 H.J. Lu <hongjiu.lu@intel.com>
PR binutils/18209
* objcopy.c (setup_section): Copy compress status.
2015-04-15 H.J. Lu <hongjiu.lu@intel.com>
* NEWS: Mention

3
binutils/objcopy.c
View File

@ -2929,6 +2929,9 @@ setup_section (bfd *ibfd, sec_ptr isection, void *obfdarg)
/* Copy merge entity size. */
osection->entsize = isection->entsize;
/* Copy compress status. */
osection->compress_status = isection->compress_status;
/* This used to be mangle_section; we do here to avoid using
bfd_get_section_by_name since some formats allow multiple
sections with the same name. */

10
binutils/testsuite/ChangeLog
View File

@ -1,3 +1,13 @@
2015-04-23 H.J. Lu <hongjiu.lu@intel.com>
PR binutils/18209
* binutils-all/compress.exp: Replace dw2-3.W with dw2-3gabi.W
on zlib-gabi output.
* binutils-all/dw2-1.W: Convert section names to .zdebug_*.
* binutils-all/dw2-3.W: Likewise.
* binutils-all/objdump.W: Likewise.
* binutils-all/dw2-3gabi.W: New file.
2015-04-20 H.J. Lu <hongjiu.lu@intel.com>
* binutils-all/i386/compressed-1b.d: Don't hardcode offset of

2
binutils/testsuite/binutils-all/compress.exp
View File

@ -566,7 +566,7 @@ if { [lindex $got 0] != 0 || ![string match "" [lindex $got 1]] } then {
fail "$testname"
send_log "$got\n"
}
if { [regexp_diff objdump.out $srcdir/$subdir/dw2-3.W] } then {
if { [regexp_diff objdump.out $srcdir/$subdir/dw2-3gabi.W] } then {
fail "$testname"
} else {
pass "$testname"

4
binutils/testsuite/binutils-all/dw2-1.W
View File

@ -1,7 +1,7 @@
.*dw2-1-compressed.o: file format .*
Contents of the .debug_info section:
Contents of the .z?debug_info section:
Compilation Unit @ offset 0x0:
Length: 0x4e \(32-bit\)
@ -30,7 +30,7 @@ Contents of the .debug_info section:
<50> DW_AT_encoding : 5 \(signed\)
<1><51>: Abbrev Number: 0
Raw dump of debug contents of section .debug_line:
Raw dump of debug contents of section .z?debug_line:
Offset: 0x0
Length: 62

6
binutils/testsuite/binutils-all/dw2-3.W
View File

@ -1,7 +1,7 @@
.*: +file format .*
Contents of the .debug_info section:
Contents of the .zdebug_info section:
Compilation Unit @ offset 0x0:
Length: 0x5e \(32-bit\)
@ -56,7 +56,7 @@ Contents of the .debug_info section:
<9b> DW_AT_const_value : 2
<1><9c>: Abbrev Number: 0
Contents of the .debug_abbrev section:
Contents of the .zdebug_abbrev section:
Number TAG \(0x0\)
1 DW_TAG_compile_unit \[has children\]
@ -110,7 +110,7 @@ Contents of the .debug_abbrev section:
DW_AT_const_value DW_FORM_data1
DW_AT value: 0 DW_FORM value: 0
Raw dump of debug contents of section .debug_line:
Raw dump of debug contents of section .z?debug_line:
Offset: 0x0
Length: 62

156
binutils/testsuite/binutils-all/dw2-3gabi.W Normal file
View File

@ -0,0 +1,156 @@
.*: +file format .*
Contents of the .debug_info section:
Compilation Unit @ offset 0x0:
Length: 0x5e \(32-bit\)
Version: 2
Abbrev Offset: 0x0
Pointer Size: 4
<0><b>: Abbrev Number: 1 \(DW_TAG_compile_unit\)
<c> DW_AT_stmt_list : 0x0
<10> DW_AT_high_pc : 0x4
<14> DW_AT_low_pc : 0x0
<18> DW_AT_name : file1.txt
<22> DW_AT_producer : GNU C 3.3.3
<2e> DW_AT_language : 1 \(ANSI C\)
<1><2f>: Abbrev Number: 2 \(DW_TAG_subprogram\)
<30> DW_AT_external : 1
<31> DW_AT_decl_file : 1
<32> DW_AT_decl_line : 2
<33> DW_AT_name : func_cu1
<3c> DW_AT_type : <0x85>
<40> DW_AT_low_pc : 0x0
<44> DW_AT_high_pc : 0x4
<48> DW_AT_frame_base : 1 byte block: 55 \(DW_OP_reg5 \([^()]*\)\)
<1><4a>: Abbrev Number: 3 \(DW_TAG_base_type\)
<4b> DW_AT_name : int1
<50> DW_AT_byte_size : 4
<51> DW_AT_encoding : 5 \(signed\)
<1><52>: Abbrev Number: 4 \(DW_TAG_const_type\)
<53> DW_AT_type : <0x4a>
<1><57>: Abbrev Number: 5 \(DW_TAG_variable\)
<58> DW_AT_name : one
<5c> DW_AT_type : <0x52>
<60> DW_AT_const_value : 1
<1><61>: Abbrev Number: 0
Compilation Unit @ offset 0x62:
Length: 0x37 \(32-bit\)
Version: 2
Abbrev Offset: 0x45
Pointer Size: 4
<0><6d>: Abbrev Number: 1 \(DW_TAG_compile_unit\)
<6e> DW_AT_name : file1.txt
<78> DW_AT_producer : GNU C 3.3.3
<84> DW_AT_language : 1 \(ANSI C\)
<1><85>: Abbrev Number: 2 \(DW_TAG_base_type\)
<86> DW_AT_name : int2
<8b> DW_AT_byte_size : 4
<8c> DW_AT_encoding : 5 \(signed\)
<1><8d>: Abbrev Number: 3 \(DW_TAG_const_type\)
<8e> DW_AT_type : <0x85>
<1><92>: Abbrev Number: 4 \(DW_TAG_variable\)
<93> DW_AT_name : two
<97> DW_AT_type : <0x8d>
<9b> DW_AT_const_value : 2
<1><9c>: Abbrev Number: 0
Contents of the .debug_abbrev section:
Number TAG \(0x0\)
1 DW_TAG_compile_unit \[has children\]
DW_AT_stmt_list DW_FORM_data4
DW_AT_high_pc DW_FORM_addr
DW_AT_low_pc DW_FORM_addr
DW_AT_name DW_FORM_string
DW_AT_producer DW_FORM_string
DW_AT_language DW_FORM_data1
DW_AT value: 0 DW_FORM value: 0
2 DW_TAG_subprogram \[no children\]
DW_AT_external DW_FORM_flag
DW_AT_decl_file DW_FORM_data1
DW_AT_decl_line DW_FORM_data1
DW_AT_name DW_FORM_string
DW_AT_type DW_FORM_ref_addr
DW_AT_low_pc DW_FORM_addr
DW_AT_high_pc DW_FORM_addr
DW_AT_frame_base DW_FORM_block1
DW_AT value: 0 DW_FORM value: 0
3 DW_TAG_base_type \[no children\]
DW_AT_name DW_FORM_string
DW_AT_byte_size DW_FORM_data1
DW_AT_encoding DW_FORM_data1
DW_AT value: 0 DW_FORM value: 0
4 DW_TAG_const_type \[no children\]
DW_AT_type DW_FORM_ref4
DW_AT value: 0 DW_FORM value: 0
5 DW_TAG_variable \[no children\]
DW_AT_name DW_FORM_string
DW_AT_type DW_FORM_ref4
DW_AT_const_value DW_FORM_data1
DW_AT value: 0 DW_FORM value: 0
Number TAG \(0x45\)
1 DW_TAG_compile_unit \[has children\]
DW_AT_name DW_FORM_string
DW_AT_producer DW_FORM_string
DW_AT_language DW_FORM_data1
DW_AT value: 0 DW_FORM value: 0
2 DW_TAG_base_type \[no children\]
DW_AT_name DW_FORM_string
DW_AT_byte_size DW_FORM_data1
DW_AT_encoding DW_FORM_data1
DW_AT value: 0 DW_FORM value: 0
3 DW_TAG_const_type \[no children\]
DW_AT_type DW_FORM_ref4
DW_AT value: 0 DW_FORM value: 0
4 DW_TAG_variable \[no children\]
DW_AT_name DW_FORM_string
DW_AT_type DW_FORM_ref4
DW_AT_const_value DW_FORM_data1
DW_AT value: 0 DW_FORM value: 0
Raw dump of debug contents of section .debug_line:
Offset: 0x0
Length: 62
DWARF Version: 2
Prologue Length: 35
Minimum Instruction Length: 1
Initial value of 'is_stmt': 1
Line Base: 1
Line Range: 1
Opcode Base: 16
Opcodes:
Opcode 1 has 0 args
Opcode 2 has 1 args
Opcode 3 has 1 args
Opcode 4 has 1 args
Opcode 5 has 1 args
Opcode 6 has 0 args
Opcode 7 has 0 args
Opcode 8 has 0 args
Opcode 9 has 1 args
Opcode 10 has 0 args
Opcode 11 has 0 args
Opcode 12 has 1 args
Opcode 13 has 0 args
Opcode 14 has 0 args
Opcode 15 has 0 args
The Directory Table is empty.
The File Name Table \(offset 0x1f\):
Entry Dir Time Size Name
1 0 0 0 file1.txt
Line Number Statements:
\[0x0000002d\] Extended opcode 2: set Address to 0x0
\[0x00000034\] Advance Line by 3 to 4
\[0x00000036\] Copy
\[0x00000037\] Copy
\[0x00000038\] Extended opcode 2: set Address to 0x4
\[0x0000003f\] Extended opcode 1: End of Sequence

6
binutils/testsuite/binutils-all/objdump.W
View File

@ -1,7 +1,7 @@
.*dw2-compressed.o: file format .*
Contents of the .debug_info section:
Contents of the .z?debug_info section:
Compilation Unit @ offset 0x0:
Length: 0x4e \(32-bit\)
@ -30,7 +30,7 @@ Contents of the .debug_info section:
<50> DW_AT_encoding : 5 \(signed\)
<1><51>: Abbrev Number: 0
Raw dump of debug contents of section .debug_line:
Raw dump of debug contents of section .z?debug_line:
Offset: 0x0
Length: 62
@ -74,7 +74,7 @@ Raw dump of debug contents of section .debug_line:
\[0x.*\] Extended opcode 1: End of Sequence
Contents of the .debug_abbrev section:
Contents of the .zdebug_abbrev section:
Number TAG \(0x0\)
1 DW_TAG_compile_unit \[has children\]

5
ld/ChangeLog
View File

@ -1,3 +1,8 @@
2015-04-23 H.J. Lu <hongjiu.lu@intel.com>
PR binutils/18209
* ldfile.c (ldfile_try_open_bfd): Set is_linker_input to 1.
2015-04-23 Alan Modra <amodra@gmail.com>
* emulparams/elf64ppc.sh (GOT): Align.

3
ld/ldfile.c
View File

@ -142,6 +142,9 @@ ldfile_try_open_bfd (const char *attempt,
/* Linker needs to decompress sections. */
entry->the_bfd->flags |= BFD_DECOMPRESS;
/* This is a linker input BFD. */
entry->the_bfd->is_linker_input = 1;
#ifdef ENABLE_PLUGINS
if (entry->flags.lto_output)
entry->the_bfd->lto_output = 1;