Commit Graph

258 Commits

Author SHA1 Message Date
Sean Silva
73d86aa56a Nuke MCAnalysis.
The code is buggy and barely tested. It is also mostly boilerplate.
(This includes MCObjectDisassembler, which is the interface to that
functionality)

Following an IRC discussion with Jim Grosbach, it seems sensible to just
nuke the whole lot of functionality, and dig it up from VCS if
necessary (I hope not!).

All of this stuff appears to have been added in a huge patch dump (look
at the timeframe surrounding e.g. r182628) where almost every patch
seemed to be untested and not reviewed before being committed.
Post-review responses to the patches were never addressed. I don't think
any of it would have passed pre-commit review.

I doubt anyone is depending on this, since this code appears to be
extremely buggy. In limited testing that Michael Spencer and I did, we
couldn't find a single real-world object file that wouldn't crash the
CFG reconstruction stuff. The symbolizer stuff has O(n^2) behavior and
so is not much use to anyone anyway. It seemed simpler to remove them as
a whole. Most of this code is boilerplate, which is the only way it was
able to scrape by 60% coverage.

HEADSUP: Modules folks, some files I nuked were referenced from
include/llvm/module.modulemap; I just deleted the references. Hopefully
that is the right fix (one was a FIXME though!).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216983 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-02 22:32:20 +00:00
Rafael Espindola
78e8d52a58 llvm-objdump: don't print relocations in non-relocatable files.
This matches the behavior of GNU objdump.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215844 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-17 19:09:37 +00:00
Rafael Espindola
4c511cd88f Fix an off-by-one bug in the target independent llvm-objdump.
It would prevent the display of a single byte instruction before a label.

Patch by Steve King!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215837 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-17 16:31:39 +00:00
Rafael Espindola
d272237f0b pr20589: Fix duplicated arch flag.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215216 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-08 16:18:29 +00:00
Rafael Espindola
d57120551f Use "weak alias" instead of "alias weak"
Before this patch we had

@a = weak global ...
but
@b = alias weak ...

The patch changes aliases to look more like global variables.

Looking at some really old code suggests that the reason was that the old
bison based parser had a reduction for alias linkages and another one for
global variable linkages. Putting the alias first avoided the reduce/reduce
conflict.

The days of the old .ll parser are long gone. The new one parses just "linkage"
and a later check is responsible for deciding if a linkage is valid in a
given context.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214355 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-30 22:51:54 +00:00
Kevin Enderby
0ee7d91abd Tweak llvm-nm’s -undefined-only (aka -u) printing for Mach-O files
to just print the symbol name.  So it matches darwin’s nm(1) -u option.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214143 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-28 23:17:38 +00:00
Kevin Enderby
fb0326ce1b Add an implementation for llvm-nm’s -print-file-name option (aka -o and -A).
The -print-file-name option in llvm-nm is to precede each symbol
with the object file it came from.  While code for the parsing of this
option and its aliases existed there was no code to implement it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213906 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-24 23:31:52 +00:00
Kevin Enderby
c61aa0219e Add printing of Mach-O stabs in llvm-nm.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213327 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-17 22:47:16 +00:00
Kevin Enderby
15f2c50e63 Add the "-x" flag to llvm-nm for Mach-O files that prints the fields of a symbol in hex.
(generally use for debugging the tools).  This is same functionality as darwin’s
nm(1) "-x" flag.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213176 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-16 17:38:26 +00:00
Simon Atanasyan
b2b56ed1a6 [Mips] Support SHT_MIPS_ABIFLAGS section type flag in the llvm-readobj,
obj2yaml and yaml2obj tools.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212908 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-13 15:28:54 +00:00
Simon Atanasyan
dafce2c9a6 [ELFYAML] Group ELF section type flags to target specific blocks.
Recognize only flags which correspond to the current target.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212880 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-12 18:25:08 +00:00
Kevin Enderby
7f50100cfa Add the "-s" flag to llvm-nm for Mach-O files that prints symbols only in
the specified section.  This is same functionality as darwin’s nm(1) "-s" flag.

There is one FIXME in the code and I’m all ears to anyone that can help me
with that.  This option takes exactly two strings and should be allowed
anywhere on the command line.  Such that "llvm-nm -s __TEXT __text foo.o"
would work. But that does not as the CommandLine Library does not have a
way to make this work as far as I can tell.  For now the "-s __TEXT __text"
has to be last on the command line.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212842 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-11 20:30:00 +00:00
Kevin Enderby
e3108d31e0 Changed the lvm-nm alias "-s" for -print-armap to "-M".
This will allow the "-s" flag to implemented in the future as it
is in darwin’s nm(1) to list symbols only in the specified section.

Given a LGTM by Shankar Easwaran who originally implemented
the support for lvm-nm’s -print-armap and archive map symbols.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212576 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-08 23:47:31 +00:00
Kevin Enderby
d2ae11527a Add support for BSD format Archive map symbols (aka the table of contents
from a __.SYMDEF or "__.SYMDEF SORTED" archive member).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212568 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-08 22:10:02 +00:00
Rafael Espindola
8089fee2dd Ignore llvm.* globals.
It is not clear if llvm.global_ctors should or should not be in llvm.metadata,
but in practice it is not and we need to ignore it for LTO.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212351 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-04 19:08:22 +00:00
Rafael Espindola
40b9d67109 Mark intrinsic functions as llvm-specific.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212347 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-04 15:58:00 +00:00
Rafael Espindola
ada0f6a93e Don't include llvm.metadata variables in archive symbol tables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212344 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-04 15:03:17 +00:00
Kevin Enderby
26272defb6 Add the -just-symbol-name (aka -j) flag to llvm-nm to just print the
symbol’s name.  On darwin the -j flag is used (often in combinations
with other flags) to produce a complete list of symbol names which
than can then be reorder and used with ld(1)’s -order_file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212294 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-03 21:51:07 +00:00
Rafael Espindola
95c1ba668f Move test since it now depends on the x86 backend.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212289 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-03 20:26:21 +00:00
Rafael Espindola
96052a8d12 Add support for inline asm symbols in llvm-ar.
This should allow llvm-ar to be used instead of gnu ar + plugin in a LTO
build. I will add a release note about it once I finish a LTO bootstrap with it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212287 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-03 19:40:08 +00:00
Rafael Espindola
0a7a2ef6b5 Add support for inline asm symbols to IRObjectFile.
This also enables it in llvm-nm so that it can be tested.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212282 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-03 18:59:23 +00:00
Kevin Enderby
c150516f36 Add the -U flag to llvm-nm as an alias to -defined-only
as darwin’s nm(1) uses -U for this functionality.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212280 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-03 18:18:50 +00:00
Kevin Enderby
1faddea960 Add the -reverse-sort flag (aka -r) to llvm-nm
which exists in other Unix nm(1)’s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212235 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-02 23:23:58 +00:00
Kevin Enderby
adaa88ecc5 Add the -arch flag support to llvm-size like what was done to llvm-nm
to select the slice out of a Mach-O universal file.  This also includes
support for -arch all, selecting the host architecture by default from
a universal file and checking if -arch is used with a standard Mach-O
it matches that architecture.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212108 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-01 17:19:10 +00:00
Ed Maste
816d9c7b72 objdump: Add test for ELF file with no section table
This is a test for the fix in r211904.

Differential Revision: http://reviews.llvm.org/D4349


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212059 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-30 20:03:02 +00:00
Kevin Enderby
c28eff1356 Add the -arch flag support to llvm-nm to select the slice out of a Mach-O
universal file.  This also includes support for -arch all, selecting the host
architecture by default from a universal file and checking if -arch is used
with a standard Mach-O it matches that architecture.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212054 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-30 18:45:23 +00:00
Simon Atanasyan
fc9897f66f [ELF][Mips] Fix recognition of MIPS 64-bit arch in the ELFObjectFile:getArch() method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211891 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-27 11:36:45 +00:00
NAKAMURA Takumi
63a0ff93c0 nm-trivial-object.test requires shell since Lit internal runner isn't capable of chdir.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211537 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-23 21:07:04 +00:00
Kevin Enderby
138222e56f Change the default input for llvm-nm to be a.out instead of standard input
to match llvm-size and other UNIX systems for their nm(1).

Tweak test cases that used llvm-nm with standard input to add a "-" to
indicate that and add a test case to check the default of a.out for llvm-nm.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211529 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-23 20:27:53 +00:00
Kevin Enderby
efc447827d Fix some double printing of filenames for archives in llvm-nm when
the tool is given multiple files.  Also fix the same issue with Mach-O
universal files. And fix the newline spacing to separate the output
in these cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211405 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-20 21:29:27 +00:00
Kevin Enderby
d1e64617ee Added the -m option as an alias for -format=darwin to llvm-nm and llvm-size
which is what the darwin tools use for the Mach-O format output.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211326 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-20 00:04:16 +00:00
Kevin Enderby
f7b992bdcd Fix the output of llvm-nm for Mach-O files to use the characters ‘d’ and ‘b’ for
data and bss symbols instead of the generic ’s’ for a symbol in a section.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211321 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-19 22:49:21 +00:00
Kevin Enderby
c28016e413 Change the output of llvm-nm and llvm-size for Mach-O universal files (aka
fat files) to print “ (for architecture XYZ)” for fat files with more than
one architecture to be like what the darwin tools do for fat files.

Also clean up the Mach-O printing of archive membernames in llvm-nm to use
the darwin form of "libx.a(foo.o)".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211316 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-19 22:03:18 +00:00
Kevin Enderby
fb2b9fb894 Teach llvm-size to know about Mach-O universal files (aka fat files) and
fat files containing archives.

Also fix a bug in MachOUniversalBinary::ObjectForArch::ObjectForArch()
where it needed a >= when comparing the Index with the number of
objects in a fat file.  As the index starts at 0.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211230 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-18 22:04:40 +00:00
Kevin Enderby
acc5e810aa Add "-format darwin" to llvm-size to be like darwin's size(1) -m output, and
and the -l option for the long format.  Also when the object is a Mach-O
file and the format is berkeley produce output like darwin’s default size(1)
summary berkeley derived output.

Like System V format, there are also some small changes in how and where
the file names and archive member names are printed for darwin and
Mach-O.

Like the changes to llvm-nm these are the first steps in seeing if it is
possible to make llvm-size produce the same output as darwin's size(1).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211117 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-17 17:54:13 +00:00
Rafael Espindola
7f2f94faeb Fix pr17056.
This makes llvm-nm ignore members that are not sufficiently aligned for
lib/Object to handle.

These archives are invalid. GNU AR is able to handle this, but in general
just warns about broken archive members.

We should probably start warning too, but for now just make sure llvm-nm
exits with an 0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211036 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-16 16:41:00 +00:00
Rafael Espindola
7acd886ecf Use std::error_code instead of llvm::error_code.
The idea of this patch is to turn llvm/Support/system_error.h into a
transitional header that just brings in the erorr_code api to the llvm
namespace. I will remove it shortly afterwards.

The cases where the general idea needed some tweaking:

* std::errc is a namespace in msvc, so we cannot use "using std::errc". I could
add an #ifdef, but there were not that many uses, so I just added std:: to
them in this patch.

* Template specialization had to be moved to the std namespace in this
patch set already.

* The msvc implementation of default_error_condition doesn't seem to
provide the same transformations as we need. Not too surprising since
the standard doesn't actually say what "equivalent" means. I fixed the
problem by keeping our old mapping and using it at error_code
construction time.

Despite these shortcomings I think this is still a good thing. Some reasons:

* The different implementations of system_error might improve over time.
* It removes 925 lines of code from llvm already.
* It removes 6313 bytes from the text segment of the clang binary when
it is built with gcc and 2816 bytes when building with clang and
libstdc++.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210687 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-11 19:05:50 +00:00
Alp Toker
8aeca44558 Reduce verbiage of lit.local.cfg files
We can just split targets_to_build in one place and make it immutable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210496 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-09 22:42:55 +00:00
Simon Atanasyan
3c9a2ee891 [yaml2obj][obj2yaml] Support ELF symbol's visibility flags (default/hidden/protected).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210316 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 07:41:57 +00:00
Kevin Enderby
ecbc72405e Add "-format darwin" to llvm-nm to be like darwin's nm(1) -m output.
This is a first step in seeing if it is possible to make llvm-nm produce
the same output as darwin's nm(1).  Darwin's default format is bsd but its
-m output prints the longer Mach-O specific details.  For now I added the
"-format darwin" to do this (whos name may need to change in the future).
As there are other Mach-O specific flags to nm(1) which I'm hoping to add some
how in the future.  But I wanted to see if I could get the correct output for
-m flag using llvm-nm and the libObject interfaces.

I got this working but would love to hear what others think about this approach
to getting object/format specific details printed with llvm-nm.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210285 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-05 21:21:57 +00:00
Simon Atanasyan
df96c562a5 [yaml2obj] Add new command line option -docnum.
Input YAML file might contain multiple object file definitions.
New option `-docnum` allows to specify an ordinal number (starting from 1)
of definition used for an object file generation.

Patch reviewed by Sean Silva.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209967 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-31 04:51:07 +00:00
Simon Atanasyan
ce538c7834 [elf2yaml][ELF] Move Info field to the RelocationSection structure. This
field represents ELF section header sh_info field and does not have any
sense for regular sections. Its interpretation depends on section type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209801 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-29 11:05:31 +00:00
NAKAMURA Takumi
4ca8b0b66d llvm/test/Object/ar-error.test: Don't check the message "No such file or directory".
It didn't match on non-English version of Windows.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209570 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-24 08:47:11 +00:00
Simon Atanasyan
84a0dc323d [YAML] Add an optional argument EnumMask to the yaml::IO::bitSetCase().
Some bit-set fields used in ELF file headers in fact contain two parts.
The first one is a regular bit-field. The second one is an enumeraion.
For example ELF header `e_flags` for MIPS target might contain the
following values:

Bit-set values:

  EF_MIPS_NOREORDER = 0x00000001
  EF_MIPS_PIC       = 0x00000002
  EF_MIPS_CPIC      = 0x00000004
  EF_MIPS_ABI2      = 0x00000020

Enumeration:

  EF_MIPS_ARCH_32   = 0x50000000
  EF_MIPS_ARCH_64   = 0x60000000
  EF_MIPS_ARCH_32R2 = 0x70000000
  EF_MIPS_ARCH_64R2 = 0x80000000

For printing bit-sets we use the `yaml::IO::bitSetCase()`. It does not
support bit-set/enumeration combinations and prints too many flags from
an enumeration part. This patch fixes this problem. New method
`yaml::IO::maskedBitSetCase()` handle "enumeration" part of bitset
defined by provided mask.

Patch reviewed by Nick Kledzik and Sean Silva.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209504 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-23 08:07:09 +00:00
Filipe Cabecinhas
f97e200a98 llvm-ar: Output the file we errored on.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209500 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-23 05:52:12 +00:00
Kevin Enderby
b38059ab25 Update MachOObjectFile::getSymbolAddress so it returns UnknownAddressOrSize
for undefined symbols, so it matches what COFFObjectFile::getSymbolAddress
does.  This allows llvm-nm to print spaces instead of 0’s for the value
of undefined symbols in Mach-O files.

To make this change other uses of MachOObjectFile::getSymbolAddress
are updated to handle when the Value is returned as UnknownAddressOrSize.
Which is needed to keep two of the ExecutionEngine tests working for example.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209253 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-20 23:04:47 +00:00
Kevin Enderby
95aa960b71 Revert r209235 as it broke two tests:
Failing Tests (2):
	    LLVM :: ExecutionEngine/MCJIT/stubs-sm-pic.ll
	    LLVM :: ExecutionEngine/MCJIT/stubs.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209236 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-20 21:10:15 +00:00
Kevin Enderby
e3f74564ff Update MachOObjectFile::getSymbolAddress so it returns UnknownAddressOrSize
for undefined symbols.  Allowing llvm-nm to print spaces instead of 0’s for
the value of undefined symbols in Mach-O files.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209235 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-20 20:32:18 +00:00
Kevin Enderby
86ad7b70cb Implement MachOObjectFile::isSectionData() and MachOObjectFile::isSectionBSS
so that llvm-size will total up all the sections in the Berkeley format.  This
allows for rough categorizations for Mach-O sections.  And allows the total of
llvm-size’s Berkeley and System V formats to be the same.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209158 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-19 20:36:02 +00:00
Simon Atanasyan
19ab8f850f [yaml2obj][ELF] Add an optional Size field to the YAML section declaration.
Now the only method to configure ELF section's content and size is to assign
a hexadecimal string to the `Content` field. Unfortunately this way is
completely useless when you need to declare a really large section.

To solve this problem this patch adds one more optional field `Size`
to the `RawContentSection` structure. When yaml2obj generates an ELF file
it uses the following algorithm:
1. If both `Content` and `Size` fields are missed create an empty section.
2. If only `Content` field is missed take section length from the `Size`
   field and fill the section by zero.
3. If only `Size` field is missed create a section using data from
   the `Content` field.
4. If both `Content` and `Size` fields are provided validate that the `Size`
   value is not less than size of `Content` data. Than take section length
   from the `Size`, fill beginning of the section by `Content` and the rest
   by zero.

Examples
--------
* Create a section 0x10000 bytes long filled by zero
  Name: .data
  Type: SHT_PROGBITS
  Flags: [ SHF_ALLOC ]
  Size: 0x10000

* Create a section 0x10000 bytes long starting from 'CA' 'FE' 'BA' 'BE'
  Name: .data
  Type: SHT_PROGBITS
  Flags: [ SHF_ALLOC ]
  Content: CAFEBABE
  Size: 0x10000

The patch reviewed by Michael Spencer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208995 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-16 16:01:00 +00:00