Commit Graph

7558 Commits

Author SHA1 Message Date
Simon Atanasyan a0efc4268c [ELF][MIPS] Replace the magic number of GOT header entries by constant. NFC
llvm-svn: 288128
2016-11-29 10:23:50 +00:00
Simon Atanasyan 80f3d9ce93 [ELF][MIPS] Fix calculation of GOT "page address" entries number
If output section which referenced by R_MIPS_GOT_PAGE or R_MIPS_GOT16
relocations is small (less that 0x10000 bytes) and occupies two adjacent
0xffff-bytes pages, current formula gives incorrect number of required "page"
GOT entries. The problem is that in time of calculation we do not know
the section address and so we cannot calculate number of 0xffff-bytes
pages exactly.

This patch fix the formula. Now it gives a correct number of pages in
the worst case when "small" section intersects 0xffff-bytes page
boundary. From the other side, sometimes it adds one more redundant GOT
entry for each output section. But usually number of output sections
referenced by GOT relocations is small.

llvm-svn: 288127
2016-11-29 10:23:46 +00:00
George Rimar 595a763f38 [ELF] - Implemented -N (-omagic) command line option.
-N (-omagic)
  Set the text and data sections to be readable and writable. 
  Also, do not page-align the data segment.

Differential revision: https://reviews.llvm.org/D26888

llvm-svn: 288123
2016-11-29 09:43:51 +00:00
Eugene Leviant 84569e6caa [ELF] Refactor target error messages
Differential revision: https://reviews.llvm.org/D27097

llvm-svn: 288114
2016-11-29 08:05:44 +00:00
Rui Ueyama bf4ddeb97c Style fix.
llvm-svn: 288113
2016-11-29 04:22:57 +00:00
Rui Ueyama c910bc7e19 Simplify "missing argument" error message.
llvm-svn: 288112
2016-11-29 04:17:31 +00:00
Rui Ueyama e5e407beb4 Add comments.
llvm-svn: 288111
2016-11-29 04:17:30 +00:00
Rui Ueyama bd2a812ff0 Print error message header in red.
llvm-svn: 288110
2016-11-29 04:09:08 +00:00
Rafael Espindola f1e245315b Use relocations to fill statically known got entries.
Right now we just remember a SymbolBody for each got entry and
duplicate a bit of logic to decide what value, if any, should be
written for that SymbolBody.

With ARM there will be more complicated values, and it seems better to
just use the relocation code to fill the got entries. This makes it
clear that each entry is filled by the dynamic linker or by the static
linker.

llvm-svn: 288107
2016-11-29 03:45:36 +00:00
Rafael Espindola d3b32df3de Sort. NFC.
llvm-svn: 288102
2016-11-29 03:36:30 +00:00
Rafael Espindola 5498ba38df Add a test.
It would have found a missing case in another patch.

llvm-svn: 288101
2016-11-29 03:30:07 +00:00
George Rimar 1642c5d871 [ELF] - Do not put non exec sections first when -no-rosegment
That unifies handling cases when we have SECTIONS and when
-no-rosegment is given in compareSectionsNonScript()

Now Config->SingleRoRx is used for check, testcase is provided.

llvm-svn: 288022
2016-11-28 10:26:21 +00:00
George Rimar 18a3096282 [ELF] - Set Config->SingleRoRx differently. NFC.
Previously Config->SingleRoRx was set in
createFiles() and used HasSections.

This change moves it to readConfigs at place of
common flags handling, and adds logic that sets
this flag separatelly from ScriptParser if SECTIONS present.

llvm-svn: 288021
2016-11-28 10:11:10 +00:00
George Rimar 63bf011003 [ELF] - Implemented -no-rosegment.
--no-rosegment: Do not put read-only non-executable sections in their own segment

Differential revision: https://reviews.llvm.org/D26889

llvm-svn: 288020
2016-11-28 10:05:20 +00:00
Eugene Leviant ed30ce7ae4 [ELF] Print file:line for 'undefined section' errors
Differential revision: https://reviews.llvm.org/D27108

llvm-svn: 288019
2016-11-28 09:58:04 +00:00
Rafael Espindola 8e67000f1a Always create a PT_ARM_EXIDX if needed.
Unfortunatelly PT_ARM_EXIDX is special. There is no way to create it
from linker scripts, so we have to create it even if PHDRS is used.

This matches bfd and is required for the lld output to survive bfd's strip.

llvm-svn: 288012
2016-11-28 00:40:21 +00:00
Rui Ueyama 1dd86a664f Add paralell_for and use it where appropriate.
When we iterate over numbers as opposed to iterable elements,
parallel_for fits better than parallel_for_each.

llvm-svn: 288002
2016-11-27 19:28:32 +00:00
Rafael Espindola 5fcc99c27d Also skip regular symbol assignment at the start of a script.
Unfortunatelly some scripts look like

kernphys = ...
. = ....

and the expectation in that every orphan section is after the
assignment.

llvm-svn: 287996
2016-11-27 09:44:45 +00:00
Rafael Espindola 7fe4ec9b3a Don't put an orphan before the first . assignment.
This is an horrible special case, but seems to match bfd's behaviour
and is important for avoiding placing an orphan section before the
expected start of the file.

llvm-svn: 287994
2016-11-27 07:39:45 +00:00
Rui Ueyama e8a077badf Change return types of split{Non,}Strings.
They return new vectors, but at the same time they mutate other vectors,
so returning values doesn't make much sense. We should just mutate two
vectors.

llvm-svn: 287979
2016-11-26 15:15:11 +00:00
Rui Ueyama 72b1ee2533 Make getColorDiagnostics return a boolean value instead of an enum.
Config->ColorDiagnostics was of type enum before. Now it is just a
boolean flag. Thanks Rafael for suggestion.

llvm-svn: 287978
2016-11-26 15:10:01 +00:00
Rui Ueyama 1880bbed39 Split MergeOutputSection::finalize.
llvm-svn: 287977
2016-11-26 15:09:58 +00:00
Rafael Espindola f93b8c29c8 Create sections with just assignments as STT_NOBITS.
This matches the behaviour of bfd ld. Using 0 was causing problems
with strip, which would remove these sections.

llvm-svn: 287969
2016-11-26 06:55:35 +00:00
Davide Italiano 3bfa081aa9 [ELF] Be compliant with LLVM and rename Lto into LTO. NFCI.
llvm-svn: 287967
2016-11-26 05:37:04 +00:00
Rui Ueyama d873e3a694 Fix buildbots.
llvm-svn: 287952
2016-11-25 20:42:39 +00:00
Rui Ueyama 1df9316922 Fix typo.
llvm-svn: 287951
2016-11-25 20:41:45 +00:00
Rui Ueyama c01321c6b8 Do not print out ARGV0 in white because it's unreadable on white background.
llvm-svn: 287950
2016-11-25 20:37:16 +00:00
Rui Ueyama 8c8818a58c Support -color-diagnostics={auto,always,never}.
-color-diagnostics=auto is default because that's the same as
Clang's default. When color is enabled, error or warning messages
are colored like this.

  error:
  <bold>ld.lld</bold> <red>error:</red> foo.o: no such file

  warning:
  <bold>ld.lld</bold> <magenta>warning:</magenta> foo.o: no such file

Differential Revision: https://reviews.llvm.org/D27117

llvm-svn: 287949
2016-11-25 20:27:32 +00:00
Rui Ueyama 6066641423 We shouldn't call parallle_for_each if -no-thread is given.
llvm-svn: 287948
2016-11-25 20:20:57 +00:00
Rui Ueyama 2555952ba8 Parallelize uncompress() and splitIntoPieces().
Uncompressing section contents and spliting mergeable section contents
into smaller chunks are heavy tasks. They scan entire section contents
and do CPU-intensive tasks such as uncompressing zlib-compressed data
or computing a hash value for each section piece.

Luckily, these tasks are independent to each other, so we can do that
in parallel_for_each. The number of input sections is large (as opposed
to the number of output sections), so there's a large parallelism here.

Actually the current design to call uncompress() and splitIntoPieces()
in batch was chosen with doing this in mind. Basically what we need to
do here is to replace `for` with `parallel_for_each`.

It seems this patch improves latency significantly if linked programs
contain debug info (which in turn contain lots of mergeable strings.)
For example, the latency to link Clang (debug build) improved by 20% on
my machine as shown below. Note that ld.gold took 19.2 seconds to do
the same thing.

Before:
    30801.782712 task-clock (msec)         #    3.652 CPUs utilized            ( +-  2.59% )
         104,084 context-switches          #    0.003 M/sec                    ( +-  1.02% )
           5,063 cpu-migrations            #    0.164 K/sec                    ( +- 13.66% )
       2,528,130 page-faults               #    0.082 M/sec                    ( +-  0.47% )
  85,317,809,130 cycles                    #    2.770 GHz                      ( +-  2.62% )
  67,352,463,373 stalled-cycles-frontend   #   78.94% frontend cycles idle     ( +-  3.06% )
 <not supported> stalled-cycles-backend
  44,295,945,493 instructions              #    0.52  insns per cycle
                                           #    1.52  stalled cycles per insn  ( +-  0.44% )
   8,572,384,877 branches                  #  278.308 M/sec                    ( +-  0.66% )
     141,806,726 branch-misses             #    1.65% of all branches          ( +-  0.13% )

     8.433424003 seconds time elapsed                                          ( +-  1.20% )

After:
    35523.764575 task-clock (msec)         #    5.265 CPUs utilized            ( +-  2.67% )
         159,107 context-switches          #    0.004 M/sec                    ( +-  0.48% )
           8,123 cpu-migrations            #    0.229 K/sec                    ( +- 23.34% )
       2,372,483 page-faults               #    0.067 M/sec                    ( +-  0.36% )
  98,395,342,152 cycles                    #    2.770 GHz                      ( +-  2.62% )
  79,294,670,125 stalled-cycles-frontend   #   80.59% frontend cycles idle     ( +-  3.03% )
 <not supported> stalled-cycles-backend
  46,274,151,813 instructions              #    0.47  insns per cycle
                                           #    1.71  stalled cycles per insn  ( +-  0.47% )
   8,987,621,670 branches                  #  253.003 M/sec                    ( +-  0.60% )
     148,900,624 branch-misses             #    1.66% of all branches          ( +-  0.27% )

     6.747548004 seconds time elapsed                                          ( +-  0.40% )

llvm-svn: 287946
2016-11-25 20:05:08 +00:00
Rui Ueyama 623b36e358 Move typedefs inside a class definition.
llvm-svn: 287945
2016-11-25 18:51:56 +00:00
Rui Ueyama 22375f2406 Remove a parameter from ScriptParser.
llvm-svn: 287944
2016-11-25 18:51:54 +00:00
Rui Ueyama da06bfb794 Move getLocation from Relocations.cpp to InputSection.cpp.
The function was used only within Relocations.cpp, but now we are
using it in many places, so this patch moves it to a file that fits
to the functionality.

llvm-svn: 287943
2016-11-25 18:51:53 +00:00
Eugene Leviant f04777527e [ELF] Add explicit template instantiations for toString
llvm-svn: 287938
2016-11-25 16:42:04 +00:00
Eugene Leviant ab024a353f [ELF] Refactor getDynRel to print error location
Differential revision: https://reviews.llvm.org/D27055

llvm-svn: 287915
2016-11-25 08:56:36 +00:00
Eugene Leviant c8c1b7bfae [ELF] EhOutputSection improvements
Differential revision: https://reviews.llvm.org/D27098

llvm-svn: 287914
2016-11-25 08:27:15 +00:00
George Rimar 11992c86d9 [ELF] - Add support for access to most of synthetic sections from linkerscript.
This is important for cases like:

  .sdata        : {
    *(.got.plt .got)
...
  }

That was not supported before as there was no way to get access to 
synthetic sections from script.

More details on review page.

Differential revision: https://reviews.llvm.org/D27040

llvm-svn: 287913
2016-11-25 08:05:41 +00:00
Rui Ueyama 26081caf48 Use toString() to report incompatible files.
llvm-svn: 287901
2016-11-24 20:59:44 +00:00
Rui Ueyama d4c94d1899 Include a hint how to see all errors if error is truncated.
This patch changes the error message from

  too many errors emitted, stopping now

to

  too many errors emitted, stopping now (use -error-limit=0 to see all errors)

Thanks for Sean for the suggestion!

llvm-svn: 287900
2016-11-24 20:31:43 +00:00
Rui Ueyama a3ac17372b Define toString(const SymbolBody &) and remove maybeDemangle instead.
Differential Revision: https://reviews.llvm.org/D27065

llvm-svn: 287899
2016-11-24 20:24:18 +00:00
Rafael Espindola 4862ae8cc5 Use a more explicit type for the sizeof.
llvm-svn: 287895
2016-11-24 16:38:35 +00:00
Peter Smith 719eb8efa5 [ELF] Add terminating sentinel .ARM.exidx table entry
The .ARM.exidx table has an entry for each function with the first entry
giving the start address of the function, the table is sorted in ascending
order of function address. Given a PC value, the unwinder will search the
table for the entry that contains the PC value.
    
If the table entry happens to be the last, the range of the addresses that
the final unwinding table describes will extend to the end of the address
space. To prevent an incorrect address outside the address range of the
program matching the last entry we follow ld.bfd's example and add a
sentinel EXIDX_CANTUNWIND entry at the end of the table. This gives the
final real table entry an upper bound.
    
In addition the llvm libunwind unwinder currently depends on the presence
of a sentinel entry (PR31091).

Differential revision: https://reviews.llvm.org/D26977

llvm-svn: 287869
2016-11-24 11:43:55 +00:00
George Rimar 066bf6e1b3 [ELF] - Removed unused method. NFC.
llvm-svn: 287860
2016-11-24 09:42:10 +00:00
Rui Ueyama 3aaacb282f Update comment.
llvm-svn: 287850
2016-11-24 01:44:21 +00:00
Rui Ueyama f373dd76ce Remove HasError and use ErrorCount instead.
HasError was always true if ErrorCount > 0, so we can use ErrorCount instead.

llvm-svn: 287849
2016-11-24 01:43:21 +00:00
Rui Ueyama bf9523f549 [COFF] Add DebugInfoCodeView dependency
rL287555 introduces a link error when building with BUILD_SHARED_LIBS:

  undefined reference to llvm::codeview::CVSymbolDumper::dump(),
  and more...

The functions are available in libDebugInfoCodeView, from LLVM.

Patch by Visoiu Mistrih Francis!

llvm-svn: 287837
2016-11-23 22:58:25 +00:00
Rui Ueyama 2eda6d1633 Set default entry point to .text if no entry point is found.
Previously, if a symbol specified by -e or ENTRY() is not found,
we didn't set entry point address. That is incompatible with GNU
because GNU linkers set the first address of .text to entry.
This patch implement that behavior.

llvm-svn: 287836
2016-11-23 22:41:00 +00:00
Simon Atanasyan 8469b8841c [ELF][MIPS] Fix handling of _gp/_gp_disp/__gnu_local_gp symbols
Offset between beginning of a .got section and _gp symbols used in MIPS
GOT relocations calculations. Usually the expression looks like
VA + Offset - GP, where VA is the .got section address, Offset - offset
of the GOT entry, GP - offset between .got and _gp. Also there two "magic"
symbols _gp_disp and __gnu_local_gp which hold the offset mentioned above.
These symbols might be referenced by MIPS relocations.

Now the linker always defines _gp symbol and uses hardcoded value for
its initialization. So offset between .got and _gp is 0x7ff0. The _gp_disp
and __gnu_local_gp defined if required and initialized by 0x7ff0.
In fact that is not correct because _gp symbol might be defined by a linker
script and holds arbitrary value. In that case we need to use this value
in relocation calculation and initialize _gp_disp and __gnu_local_gp
properly.

The patch fixes the problem and completes fixing the bug #30311.
https://llvm.org/bugs/show_bug.cgi?id=30311

Differential revision: https://reviews.llvm.org/D27036

llvm-svn: 287832
2016-11-23 22:22:16 +00:00
Rui Ueyama 835bd72322 Remove trailing whitespace.
llvm-svn: 287830
2016-11-23 22:10:46 +00:00
Rui Ueyama d3a06ffb1c Use llvm::utohexstr instead of Twine::utohexstr.
They are essentially the same in this context, so I prefer the one
that doesn't need `Twine::`.

llvm-svn: 287814
2016-11-23 21:24:26 +00:00
Rafael Espindola 20b6d3d0d3 Fix this on 32 bit hosts.
Looks like we have no 32 bit bot that builds with mips support.

llvm-svn: 287799
2016-11-23 19:16:20 +00:00
Rui Ueyama 1b591cf3d3 Fix uninitialized variable access.
llvm-svn: 287797
2016-11-23 19:03:35 +00:00
Rui Ueyama 0ede7f281e Make log(), error() and fatal() thread-safe.
llvm-svn: 287794
2016-11-23 18:34:28 +00:00
Rui Ueyama ac95f6bfcc Limit default maximum number of errors to 20.
This is in the context of https://llvm.org/bugs/show_bug.cgi?id=31109.
When LLD prints out errors for relocations, it tends to print out
extremely large number of errors (like millions) because it would
print out one error per relocation.

This patch makes LLD bail out if it prints out more than 20 errors.
You can configure the limitation using -error-limit argument.
-error-limit=0 means no limit.

I chose the flag name because Clang has the same feature as -ferror-limit.
"f" doesn't make sense to us, so I omitted it.

Differential Revision: https://reviews.llvm.org/D26981

llvm-svn: 287789
2016-11-23 18:15:37 +00:00
Rui Ueyama 28590b6118 Re-commit r287727: Use SHA1::hash and MD5::hash functions.
r287727 was not a change that broke buildbots; the other change
(r287726) that I made to LLVM broke them.

llvm-svn: 287788
2016-11-23 18:11:38 +00:00
Rui Ueyama 3fc0f7e54f Define toString() as a generic function to get a string for error message.
We have different functions to stringize objects to construct
error messages. For InputFile, we have getFilename, and for
InputSection, we have getName. You had to memorize them.

I think this is the case where the function overloading comes in handy.

This patch defines toString() functions that are overloaded for all these
types, so that you just call it in error().

Differential Revision: https://reviews.llvm.org/D27030

llvm-svn: 287787
2016-11-23 18:07:33 +00:00
Ed Maste 8fd0196c6f lld: Default image base address to 0x200000 on x86-64
Align to the large page size (known as a superpage or huge page).
FreeBSD automatically promotes large, superpage-aligned allocations.

Differential Revision:	https://reviews.llvm.org/D27042

llvm-svn: 287782
2016-11-23 17:44:02 +00:00
Ed Maste 8d0381d61f Replace test instruction byte strings with {{.*}}
An upcoming change to the image base address for x86-64 (D27042) will
will change some addresses and hence the instruction encodings. We care
about the disassembled instructions, not their encodings.

Differential Revision:	https://reviews.llvm.org/D27056

llvm-svn: 287778
2016-11-23 17:09:38 +00:00
Eugene Leviant c3a44b2fbe [ELF] Refactor several error messages
Differential revision: https://reviews.llvm.org/D26970

llvm-svn: 287753
2016-11-23 10:07:46 +00:00
Eugene Leviant 3582ebf35e [ELF] Fixup buffer pointer when writing synthetic sections
Differential revision: https://reviews.llvm.org/D26980

llvm-svn: 287751
2016-11-23 09:47:38 +00:00
Eugene Leviant 531df4fcef [ELF] Print error location in .eh_frame parser
Differential revision: https://reviews.llvm.org/D26914

llvm-svn: 287750
2016-11-23 09:45:17 +00:00
Rui Ueyama 0cbf749397 Remove one of SymbolTable::addRegular function that forwards other addRegular.
So that we have less number of overloaded functions.

llvm-svn: 287745
2016-11-23 06:59:47 +00:00
Rui Ueyama 768c6f0ca6 Remove a forwarding constructor that is used only once.
llvm-svn: 287742
2016-11-23 06:31:23 +00:00
Rui Ueyama 35fa6c58ad Parse symbol versions in scanVersionScript() instead of insert().
There are two ways to set symbol versions. One way is to use symbol
definition file, and the other is to embed version names to symbol
names. In the latter way, symbol name is in the form of `foo@version1`
where `foo` is a real name and `version1` is a version.

We were parsing symbol names in insert(). That seems unnecessarily
too early. We can do it later after we resolve all symbols. Doing it
lazily is a good thing because it makes code easier to read
(because now we have a separate pass to parse symbol names). Also
it could slightly improve performance because if two identical symbols
have versions, we now parse them only once.

llvm-svn: 287741
2016-11-23 05:48:40 +00:00
Simon Atanasyan 399ac5c3fb [ELF][MIPS] Turn Config->Threads off for MIPS targets
For now MipsGotSection class is not ready for concurrent access from
multiple threads. The problem is in the getPageEntryOffset method. It
changes state of MipsGotSection object and might be called from
different threads at the same time. So turn Threads off for this target.

It's a temporary solution. The patch fixes MipsGotSection::getPageEntryOffset
is almost ready.

Differential revision: https://reviews.llvm.org/D27035

llvm-svn: 287740
2016-11-23 05:25:02 +00:00
Rui Ueyama d14743e17f Better formatting.
If a line is too long, its error message becomes hard to read.

llvm-svn: 287739
2016-11-23 05:14:01 +00:00
Simon Atanasyan 97deade619 [ELF][MIPS] clang-format the code
llvm-svn: 287738
2016-11-23 05:09:36 +00:00
Rui Ueyama c72ba3a4d7 Allow calling getName() on local symbols.
Previously, we stored offsets in string tables to symbols, so
you needed to pass a string table to get a symbol name. This patch
stores const char pointers instead to eliminate the need to pass
a string table.

llvm-svn: 287737
2016-11-23 04:57:25 +00:00
Rui Ueyama fd265a1f30 Revert r287727: Use SHA1::hash and MD5::hash functions.
It broke buildbots.

llvm-svn: 287730
2016-11-23 01:19:13 +00:00
Rui Ueyama be6c2f1a36 Use SHA1::hash and MD5::hash functions.
llvm-svn: 287727
2016-11-23 00:52:28 +00:00
Rui Ueyama 24625fd9b2 Dump not only type records but symbol records.
llvm-svn: 287723
2016-11-22 23:51:34 +00:00
Rui Ueyama 3cc93d7a53 Fix memory leak detected by asan.
llvm-svn: 287714
2016-11-22 23:13:08 +00:00
Rui Ueyama 838ff4d5c5 Accept -script=<file> in addition to -script <file>.
Fixes PR31126.

llvm-svn: 287711
2016-11-22 22:54:03 +00:00
Rafael Espindola 4e1a698be0 Fix test to not depend on the path size.
llvm-svn: 287704
2016-11-22 21:37:38 +00:00
Rafael Espindola 3c97dc7055 move VerDef finalization before DynStrTab
llvm-svn: 287701
2016-11-22 21:12:20 +00:00
Davide Italiano f4de3b68bb [LTO] Remove a check on datalayout.
Now that lld switched to lib/LTO, which always calls setDataLayout(),
we don't need this check anymore.
Thanks to Peter for pointing out!

llvm-svn: 287699
2016-11-22 20:37:37 +00:00
Rui Ueyama 8a44c94b8a Remove '.' from a help message.
llvm-svn: 287692
2016-11-22 20:15:35 +00:00
Rui Ueyama bdfa155fa2 Fix build breakage.
We cannot have MipsRldMap class and In<ELFT>::MipsRldMap.
Renamed the class.

llvm-svn: 287683
2016-11-22 19:24:52 +00:00
Meador Inge b2d99d6a0f [ELF] Allow `ASSERT` in output section descriptions
GNU LD allows `ASSERT` commands to be in output section descriptions.
Note that LD also mandates that `ASSERT` commands in this context must
end with a semicolon.

llvm-svn: 287677
2016-11-22 18:01:50 +00:00
Eugene Leviant 17b7a57533 [ELF] Convert .rld_map to input section
Differential revision: https://reviews.llvm.org/D26958

llvm-svn: 287675
2016-11-22 17:49:14 +00:00
Rui Ueyama 81a4b26b48 Inline small function. NFC.
llvm-svn: 287620
2016-11-22 04:33:01 +00:00
Rui Ueyama 1d75de00e8 Do not save unused pointers to In<ELFT>.
llvm-svn: 287617
2016-11-22 04:28:39 +00:00
Rui Ueyama 8b493f1ac6 Remove default definition no one uses.
llvm-svn: 287616
2016-11-22 04:17:12 +00:00
Rui Ueyama 9cfac8a849 Convert MipsOptionsSection to SyntheticSection.
llvm-svn: 287615
2016-11-22 04:13:09 +00:00
Rui Ueyama b71cae90de Convert MipsReginfoSection to SyntheticSection.
llvm-svn: 287614
2016-11-22 03:57:08 +00:00
Rui Ueyama 12f2da870e Convert MipsAbiFlagsSection to SyntheticSection.
llvm-svn: 287613
2016-11-22 03:57:06 +00:00
Rui Ueyama bb536fee32 Remove redundant assignment.
llvm-svn: 287607
2016-11-22 01:36:19 +00:00
Rui Ueyama 2d98fead25 Convert BuildId a derived class of SyntheticSection.
Some synthetic sections are not derived calsses of SyntehticSection.
They are derived directly from InputSection. For consistencly, we should
use SyntheticSection.

llvm-svn: 287606
2016-11-22 01:31:32 +00:00
Rui Ueyama ee18d95764 Remove a parameter from getOutputLoc and rename for readability. NFC.
llvm-svn: 287605
2016-11-22 01:10:34 +00:00
Rui Ueyama c4030a1937 Merge BuildId subclasses.
We had five different BuildId subclasses for five different types
of build-ids. They can simply be merged to a single class.

llvm-svn: 287603
2016-11-22 00:54:15 +00:00
Rui Ueyama d30cf96203 Remove useless newlines.
llvm-svn: 287595
2016-11-21 23:17:09 +00:00
Rafael Espindola 28d5f059ae Use the correct page size.
Config->MaxPageSize is what we use for the segment alignment, so that
is the one that we have to use for placing the header.

llvm-svn: 287569
2016-11-21 20:20:04 +00:00
Rafael Espindola 1c57007ec8 Fix address computation for headers.
If the linker script has SECTIONS, the address computation is now
always done in LinkerScript::assignAddresses, like for any other
section.

Before fixHeaders would do a tentative computation that
assignAddresses would sometimes override.

This patch also splits the cases where assignAddresses needs to add
the headers to the first PT_LOAD and the address computation. The net
effect is that we no longer create an empty page for no reason in the
included test case, which matches bfd behavior.

llvm-svn: 287565
2016-11-21 19:59:33 +00:00
Rui Ueyama b38ddb15dd Move a function definition to SyntheticSections.cpp.
This should have been moved along with r287554.

llvm-svn: 287564
2016-11-21 19:46:04 +00:00
Rui Ueyama be939b3ff6 Do plumbing work for CodeView debug info.
Previously, we discarded .debug$ sections. This patch adds them to
files so that PDB.cpp can access them.

This patch also adds a debug option, /dumppdb, to dump debug info
fed to createPDB so that we can verify that valid data has been passed.

llvm-svn: 287555
2016-11-21 17:22:35 +00:00
Eugene Leviant e9bab5d857 [ELF] Convert Version*** sections to input sections
Differential revision: https://reviews.llvm.org/D26918

llvm-svn: 287554
2016-11-21 16:59:33 +00:00
Eugene Leviant 952eb4d348 [ELF] Convert EhFrameHeader to input section
Differential revision: https://reviews.llvm.org/D26906

llvm-svn: 287549
2016-11-21 15:52:10 +00:00
Eugene Leviant 03ff016666 [ELF] Better error reporting for linker scripts
Differential revision: https://reviews.llvm.org/D26795

llvm-svn: 287547
2016-11-21 15:49:56 +00:00
Eugene Leviant 91972d7f9d [ELF] Attempt to fix Windows buidbot
llvm-svn: 287538
2016-11-21 13:57:50 +00:00
Rui Ueyama e8785ba4d7 Change the way how we print out line numbers.
LLD's error messages contain line numbers, function names or section names.
Currently they are formatter as follows.

  foo.c (32): symbol 'foo' not found
  foo.c (function bar): symbol 'foo' not found
  foo.c (.text+0x1234): symbol 'foo' not found

This patch changes them so that they are consistent with Clang's output.

  foo.c:32: symbol 'foo' not found
  foo.c:(function bar): symbol 'foo' not found
  foo.c:(.text+0x1234): symbol 'foo' not found

Differential Revision: https://reviews.llvm.org/D26901

llvm-svn: 287537
2016-11-21 13:49:57 +00:00
Eugene Leviant 7d7ff80f4b [ELF] Better error reporting for broken archives
Differential revision: https://reviews.llvm.org/D26852

llvm-svn: 287527
2016-11-21 09:28:07 +00:00
Eugene Leviant a113a4194c [ELF] Convert GdbIndexSection to input section
Differential revision: https://reviews.llvm.org/D26854

llvm-svn: 287526
2016-11-21 09:24:43 +00:00
Rui Ueyama 0b1b695a9e Add comments.
This patch rearranges code a bit to make it easy to explain.

llvm-svn: 287515
2016-11-21 02:11:05 +00:00
Rui Ueyama e0be2901cd Simplify. NFC.
llvm-svn: 287514
2016-11-21 02:10:12 +00:00
Rui Ueyama 60c4e36c7e Simplify. NFC.
llvm-svn: 287510
2016-11-20 23:15:56 +00:00
Rui Ueyama 7bed9eec36 Update comments.
llvm-svn: 287509
2016-11-20 23:15:54 +00:00
Rui Ueyama f94efdddc0 Add a flag to InputSectionBase for linker script.
Previously, we set (uintptr_t)-1 to InputSectionBase::OutSec to record
that a section has already been set to be assigned to some output section
by linker scripts. Later, we restored nullptr to the pointer to use
the field for the original purpose. That overloading is not very easy to
understand.

This patch adds a bit flag for that purpose, so that we don't need
to piggyback the flag on an unrelated pointer.

llvm-svn: 287508
2016-11-20 23:15:52 +00:00
Rui Ueyama 9f8cb730eb Use auto for obvious types.
llvm-svn: 287481
2016-11-20 02:43:44 +00:00
Rui Ueyama bd1f0630a8 Do not expose ICF class from the file.
Also this patch uses file-scope functions instead of class member function.

Now that ICF class is not visible from outside, InputSection class
can no longer be "friend" of it. So I removed the friend relation
and just make it expose the features to public.

llvm-svn: 287480
2016-11-20 02:39:59 +00:00
Rui Ueyama f7dfb2e250 Remove a file that is too short to be an independent file.
We have a .cpp and a .h for parseDynamicList(). This patch
moves the function to DriverUtil.cpp.

llvm-svn: 287468
2016-11-19 23:26:41 +00:00
Rui Ueyama 8f47556796 Remove unused #include.
llvm-svn: 287467
2016-11-19 23:18:43 +00:00
Rui Ueyama e2dfbc17c8 Refactor ICF.
In order to use forEachGroup in the final loop in ICF::run,
I changed some function parameter types.

llvm-svn: 287466
2016-11-19 23:14:23 +00:00
Rui Ueyama a05134e837 Use std::equal instead of hand-written loops.
llvm-svn: 287460
2016-11-19 20:15:55 +00:00
Rui Ueyama 1cb63183af Restore a comment that was accidentally changed.
llvm-svn: 287457
2016-11-19 19:26:52 +00:00
Rui Ueyama 061f9286df Use Optional<std::string> instead of "" to represent a failure.
llvm-svn: 287456
2016-11-19 19:23:58 +00:00
Rui Ueyama ec75220fe9 Make buildSysrootedPath file-scoped.
This patch also changes its return type to simplify callers.

llvm-svn: 287455
2016-11-19 19:23:56 +00:00
Rui Ueyama 844c1c908c Simplify "missing argument" error message.
We do not have an option taking more than one arguments,
so we can just say "missing argument" instead of "missing argument(s)".

llvm-svn: 287454
2016-11-19 18:49:38 +00:00
Rui Ueyama 98bdbdaedd Split getFdeEncoding.
llvm-svn: 287452
2016-11-19 18:44:09 +00:00
Rui Ueyama a9b7514eb0 Fix typo in error message.
llvm-svn: 287451
2016-11-19 18:34:55 +00:00
George Rimar 0a94bffe12 [ELF] - Exit on --version call.
GNU linkers disagree here.
Though both -version and -v are mentioned
in help to print the version information, GNU ld just normally exits,
while gold can continue linking. We are compatible with ld.bfd here.

This fixes PR31057.

Differential revision: https://reviews.llvm.org/D26865

llvm-svn: 287448
2016-11-19 18:14:24 +00:00
Rui Ueyama 6e68c5e5cf Simplify. NFC.
llvm-svn: 287446
2016-11-19 18:05:58 +00:00
Rui Ueyama 16068aeb58 Change filler type from ArrayRef<uint8_t> to uint32_t.
Filler expressions in linker script "=fillexp" are always handled
as 32-bit integers. Thus the new type is more natural.

llvm-svn: 287445
2016-11-19 18:05:56 +00:00
Rui Ueyama 5c851a5a6d Simplify. NFC.
llvm-svn: 287372
2016-11-18 19:45:04 +00:00
Rafael Espindola 4d2d9c07a5 Simplify handling of SHF_LINK_ORDER.
It seems a lot simpler to just sort the sections and let the
relocations do the rest.

llvm-svn: 287365
2016-11-18 19:02:15 +00:00
Eugene Leviant ff23d3e741 [ELF] Convert PltSection to input section
Differential revision: https://reviews.llvm.org/D26842

llvm-svn: 287346
2016-11-18 14:35:03 +00:00
Eugene Leviant b96e809c7f [ELF] Convert HashTableSection to input section
Differential revision: https://reviews.llvm.org/D26834

llvm-svn: 287326
2016-11-18 09:06:47 +00:00
Rui Ueyama f8f6f1e783 Update comment.
llvm-svn: 287325
2016-11-18 07:03:56 +00:00
Rui Ueyama 009d174229 Omit empty parameter list.
llvm-svn: 287324
2016-11-18 06:49:09 +00:00
Rui Ueyama 46247b85be Use consume() instead of peek() and skip().
llvm-svn: 287323
2016-11-18 06:49:07 +00:00
Eugene Leviant be809a7125 [ELF] Convert GnuHashTableSection to input section
Differential revision: https://reviews.llvm.org/D26792

llvm-svn: 287322
2016-11-18 06:44:18 +00:00
Rui Ueyama 12450b20b4 Split ScriptParser::readVersionDeclaration.
readVersionDeclaration was to read anonymous version definition and
named version definition. Splitting it into two functions should
improve readability as the two cases are different enough.

I also changed a few helper functions to return values instead of
mutating given references.

llvm-svn: 287319
2016-11-18 06:30:09 +00:00
Rui Ueyama 8980c92dde Use consistent variable name.
llvm-svn: 287318
2016-11-18 06:30:08 +00:00
Rui Ueyama 77f2a87575 Simplify MergeOutputSection.
MergeOutputSection class was a bit hard to use because it provdes
a series of finalize functions that have to be called in a right way
at a right time. It also intereacted with MergeInputSection, and the
logic was somewhat entangled between the two classes.

This patch simplifies it by providing only one finalize function.
Now, all you have to do is to call MergeOutputSection::finalize
when you have added all sections to the output section. Then, it
internally merges strings and initliazes StringPiece objects.
I think this is much easier to understand.

This patch also adds comments.

llvm-svn: 287314
2016-11-18 05:05:43 +00:00
Davide Italiano 2e8b2a70ab [ELF] Rename an historical leftover, `Chunk` is now `InputSection`.
llvm-svn: 287297
2016-11-18 02:23:48 +00:00
Davide Italiano 44665e7bc5 [ELF] Use std::for_each() and hoist common code in a lambda.
llvm-svn: 287296
2016-11-18 02:18:04 +00:00
Rafael Espindola 25a41c1f63 Add missing REQUIRES.
llvm-svn: 287284
2016-11-18 00:11:12 +00:00
Rafael Espindola 933fcab2ad Always compute sh_link for SHF_LINK_ORDER sections.
Since the output has a section table too, it is meaningful to compute
the sh_link. In a more practical note, the binutils' strip crashes if
sh_link is not set for SHT_ARM_EXIDX.

llvm-svn: 287280
2016-11-17 23:16:39 +00:00
Simon Atanasyan b8bfec686f [ELF][MIPS] Remove 'mips' word from MipsGotSection fields and methods names. NFC
Also add new comments with MIPS GOT description.

llvm-svn: 287264
2016-11-17 21:49:14 +00:00
Rafael Espindola dab02d4b68 Allow use define symbols to override linker defined ones.
I hit an internal linker script that was defining _DYNAMIC instead of
letting the linker do it. It turns out that both bfd and gold allow
that.

This is pretty easy to implement, just make the linker defined symbol
weak. This should have no impact in the case where there is no user
defined symbol: The visibility is hidden, which causes the output to
still be local.

llvm-svn: 287260
2016-11-17 21:20:16 +00:00
Rui Ueyama edf75e7992 Allow SIZEOF() command on nonexistent section.
Linker script doesn't create a section if it has no content. So the following
script doesn't create .norelocs section if it doesn't have any .rel* sections.

  .norelocs : { *(.rel*) }

Later, if you assert that the size of .norelocs is 0, LLD printed out
an error message, because it didn't allow calling SIZEOF() on nonexistent
sections.

This patch allows SIZEOF() on nonexistent sections, so that you can do
something like this.

  ASSERT(SIZEOF(.norelocs), "shouldn't contain .rel sections!")

Note that this behavior is compatible with GNU.

Differential Revision: https://reviews.llvm.org/D26810

llvm-svn: 287257
2016-11-17 20:27:10 +00:00
Rui Ueyama d84124f043 Add single quotes to error messages.
llvm-svn: 287254
2016-11-17 19:57:47 +00:00
Rui Ueyama 96db27c74f Use consistent variable name.
llvm-svn: 287253
2016-11-17 19:57:45 +00:00
Rui Ueyama cd236a9577 Use llvm::reverse to get a reverse range.
llvm-svn: 287252
2016-11-17 19:57:43 +00:00
Rui Ueyama 7ee38e00a5 Enable -threads by default.
LLD supports multi-threading, and it seems to be working well as
you can see in r287140. In short, LLD runs a few percent to 30%
faster with -threads and more than 50% faster if you are using
-build-id (your mileage may vary depending on your computer).

However, I don't think most users even don't know about that because
-threads is not a default option.

This patch enables it by default.

Discussion thread:
http://lists.llvm.org/pipermail/llvm-dev/2016-November/107160.html

llvm-svn: 287237
2016-11-17 17:06:51 +00:00
Rui Ueyama bac1c3ce85 Pass StringRefs instead of StringMatcher because it's simpler.
llvm-svn: 287234
2016-11-17 16:48:53 +00:00
Rafael Espindola 74fa2822f6 Simplify. NFC.
llvm-svn: 287231
2016-11-17 15:29:11 +00:00
Rafael Espindola d8b81d6663 Avoid accessing an end() iterator.
llvm-svn: 287225
2016-11-17 14:18:08 +00:00
Eugene Leviant 4b84a9041a [ELF] Remove unneeded forward declarations. NFC.
llvm-svn: 287218
2016-11-17 10:34:05 +00:00
Eugene Leviant 9230db94b7 [ELF] Convert SymbolTableSection to input section
Differential revision: https://reviews.llvm.org/D26740

llvm-svn: 287216
2016-11-17 09:16:34 +00:00
Chris Bieneman aeb30257c5 [CMake] NFC. Updating CMake dependency specifications
This patch updates a couple places where add_dependencies was being explicitly called to add dependencies on intrinsics_gen to instead use the DEPENDS named parameter. This cleanup is needed for a patch I'm working on to add a dependency debugging mode to the build system.

llvm-svn: 287205
2016-11-17 04:36:35 +00:00
Rui Ueyama 729ac793a2 Rename a function so that that starts with a lowercase letter.
llvm-svn: 287202
2016-11-17 04:10:09 +00:00
Rui Ueyama 0ee25a6973 Simplify and use consistent variable name. NFC.
llvm-svn: 287200
2016-11-17 03:52:14 +00:00
Rui Ueyama da805c4800 Use uint16_t instead of size_t for symbol version ID.
Because it is uint16_t in the ELF spec. Using size_t was confusing.

llvm-svn: 287198
2016-11-17 03:39:21 +00:00
Rui Ueyama aade0e29ad Add single quotes to a warning message for consistency.
llvm-svn: 287197
2016-11-17 03:32:41 +00:00
Rui Ueyama 77d917de57 Simplify handleAnonymousVersion even more.
We used to create a vector contantaining all version definitions
with wildcards because doing that was efficient. All patterns were
compiled to a regexp and matched against symbol names. Because
a regexp can be converted to a DFA, matching against union of patterns
is as cheap as matching against one patter.

We are no longer converting them to regexp. Our own glob pattern
handler doesn't do such optimization. Therefore, creating a vector
no longer makes sense.

llvm-svn: 287196
2016-11-17 03:19:34 +00:00
Rui Ueyama 4162baa4bb Simplify. NFC.
llvm-svn: 287192
2016-11-17 02:16:06 +00:00
Rui Ueyama 94bcfae26d Split scanVersionScript. NFC.
llvm-svn: 287191
2016-11-17 02:09:42 +00:00
Simon Atanasyan 725dc14bb2 [ELF][MIPS] Add MipsGotSection to handle MIPS GOT
MIPS GOT handling is very different from other targets so it is better
to keep the code in the separatre section class MipsGotSection. This
patch introduces the new section and moves all MIPS specific code from
GotSection to the new class. I did not rename fields and methods in the
MipsGotSection class to reduce the diff and plan to do that by the
separate commit.

Differential revision: https://reviews.llvm.org/D26733

llvm-svn: 287150
2016-11-16 21:01:02 +00:00
Davide Italiano c223d1bc6b [ELF] Don't replace path separators on *NIX.
Apparently this is wrong because it's legal to have a filename
on UNIX which contains a backslash.

Differential Revision:  https://reviews.llvm.org/D26734

llvm-svn: 287143
2016-11-16 19:35:36 +00:00
Rui Ueyama 87ff6fef0f Reduce number of tasks in parallel_for_each.
TaskGroup has a fairly high overhead, so we don't want to partition
tasks into too small tasks. This patch partition tasks into up to
1024 tasks.

I compared this patch with the original LLD's parallel_for_each.
I reverted r287042 locally for comparison.

With this patch, time to self-link lld with debug info changed from
6.23 seconds to 4.62 seconds (-25.8%), with -threads and without -build-id.
With both -threads and -build-id, it improved from 11.71 seconds
to 4.94 seconds (-57.8%). Full results are below.

BTW, GNU gold takes 11.65 seconds to link the same binary.

NOW

--no-threads --build-id=none
       6789.847776 task-clock (msec)         #    1.000 CPUs utilized            ( +-  1.86% )
               685 context-switches          #    0.101 K/sec                    ( +-  2.82% )
                 4 cpu-migrations            #    0.001 K/sec                    ( +- 31.18% )
         1,424,690 page-faults               #    0.210 M/sec                    ( +-  1.07% )
    21,339,542,522 cycles                    #    3.143 GHz                      ( +-  1.49% )
    13,092,260,230 stalled-cycles-frontend   #   61.35% frontend cycles idle     ( +-  2.23% )
   <not supported> stalled-cycles-backend
    21,462,051,828 instructions              #    1.01  insns per cycle
                                             #    0.61  stalled cycles per insn  ( +-  0.41% )
     3,955,296,378 branches                  #  582.531 M/sec                    ( +-  0.39% )
        75,699,909 branch-misses             #    1.91% of all branches          ( +-  0.08% )

       6.787630744 seconds time elapsed                                          ( +-  1.86% )

--threads --build-id=none
      14767.148697 task-clock (msec)         #    3.196 CPUs utilized            ( +-  2.56% )
            28,891 context-switches          #    0.002 M/sec                    ( +-  1.99% )
               905 cpu-migrations            #    0.061 K/sec                    ( +-  5.49% )
         1,262,122 page-faults               #    0.085 M/sec                    ( +-  1.68% )
    43,116,163,217 cycles                    #    2.920 GHz                      ( +-  3.07% )
    33,690,171,242 stalled-cycles-frontend   #   78.14% frontend cycles idle     ( +-  3.67% )
   <not supported> stalled-cycles-backend
    22,836,731,536 instructions              #    0.53  insns per cycle
                                             #    1.48  stalled cycles per insn  ( +-  1.13% )
     4,382,712,998 branches                  #  296.788 M/sec                    ( +-  1.33% )
        78,622,295 branch-misses             #    1.79% of all branches          ( +-  0.54% )

       4.621228056 seconds time elapsed                                          ( +-  1.90% )

--threads --build-id=sha1
      24594.457135 task-clock (msec)         #    4.974 CPUs utilized            ( +-  1.78% )
            29,902 context-switches          #    0.001 M/sec                    ( +-  2.62% )
             1,097 cpu-migrations            #    0.045 K/sec                    ( +-  6.29% )
         1,313,947 page-faults               #    0.053 M/sec                    ( +-  2.36% )
    70,516,415,741 cycles                    #    2.867 GHz                      ( +-  0.78% )
    47,570,262,296 stalled-cycles-frontend   #   67.46% frontend cycles idle     ( +-  0.86% )
   <not supported> stalled-cycles-backend
    73,124,599,029 instructions              #    1.04  insns per cycle
                                             #    0.65  stalled cycles per insn  ( +-  0.33% )
    10,495,266,104 branches                  #  426.733 M/sec                    ( +-  0.41% )
        91,444,149 branch-misses             #    0.87% of all branches          ( +-  0.83% )

       4.944291711 seconds time elapsed                                          ( +-  1.72% )

PREVIOUS

--threads --build-id=none
       7307.437544 task-clock (msec)         #    1.160 CPUs utilized            ( +-  2.34% )
             3,128 context-switches          #    0.428 K/sec                    ( +-  4.37% )
               352 cpu-migrations            #    0.048 K/sec                    ( +-  5.98% )
         1,354,450 page-faults               #    0.185 M/sec                    ( +-  2.20% )
    22,081,733,098 cycles                    #    3.022 GHz                      ( +-  1.46% )
    13,709,991,267 stalled-cycles-frontend   #   62.09% frontend cycles idle     ( +-  1.77% )
   <not supported> stalled-cycles-backend
    21,634,468,895 instructions              #    0.98  insns per cycle
                                             #    0.63  stalled cycles per insn  ( +-  0.86% )
     3,993,062,361 branches                  #  546.438 M/sec                    ( +-  0.83% )
        76,188,819 branch-misses             #    1.91% of all branches          ( +-  0.19% )

       6.298101157 seconds time elapsed                                          ( +-  2.03% )

--threads --build-id=sha1
      12845.420265 task-clock (msec)         #    1.097 CPUs utilized            ( +-  1.95% )
             4,020 context-switches          #    0.313 K/sec                    ( +-  2.89% )
               369 cpu-migrations            #    0.029 K/sec                    ( +-  6.26% )
         1,464,822 page-faults               #    0.114 M/sec                    ( +-  1.37% )
    40,668,449,813 cycles                    #    3.166 GHz                      ( +-  0.96% )
    18,863,982,388 stalled-cycles-frontend   #   46.38% frontend cycles idle     ( +-  1.82% )
   <not supported> stalled-cycles-backend
    71,560,499,058 instructions              #    1.76  insns per cycle
                                             #    0.26  stalled cycles per insn  ( +-  0.14% )
    10,044,152,441 branches                  #  781.925 M/sec                    ( +-  0.19% )
        87,835,773 branch-misses             #    0.87% of all branches          ( +-  0.09% )

      11.711773314 seconds time elapsed                                          ( +-  1.51% )

llvm-svn: 287140
2016-11-16 19:27:33 +00:00
Rui Ueyama 28212d71f6 Export fewer functions from Error.h.
Also add a comment saying that check() returns a value.

llvm-svn: 287136
2016-11-16 18:54:37 +00:00
George Rimar 17c65af82f [ELF] - Separate locals list from versions.
This change separates all versioned locals to be a separate list in config,
that was suggested by Rafael and simplifies the logic a bit.

Differential revision: https://reviews.llvm.org/D26754

llvm-svn: 287132
2016-11-16 18:46:23 +00:00
Rafael Espindola 95eae57d78 Don't error if __tls_get_addr is defined.
Turns out some systems do define it. Not producing an error in this
case matches gold and bfd.

llvm-svn: 287125
2016-11-16 18:01:41 +00:00
George Rimar e0fc24210d [ELF] - Added support for extern "c++" local symbols in version script.
Previously we did not support them,
patch implements this functionality

Differential revision: https://reviews.llvm.org/D26604

llvm-svn: 287124
2016-11-16 17:59:10 +00:00
George Rimar 7759e5b61b [ELF] - Change error message according to review comment. NFC.
Forgot about that, I am sorry.

llvm-svn: 287123
2016-11-16 17:45:45 +00:00
George Rimar 76f429b4db [ELF] - Improve diagnostic messages.
Particulaty "cannot preempt symbol" message
is extended with locations now.

Differential revision: https://reviews.llvm.org/D26738

llvm-svn: 287120
2016-11-16 17:24:06 +00:00
Rui Ueyama cb87675186 Define -build-id=tree as a synonym for -build-id=sha1.
Our build-id is a tree hash anyway, so I'll define this as a synonym
for sha1. GNU gold takes this parameter, so this is for compatibility
with that.

llvm-svn: 287119
2016-11-16 17:14:11 +00:00
Eugene Leviant a96d9027a3 [ELF] Convert RelocationSection to input section
Differential revision: https://reviews.llvm.org/D26669

llvm-svn: 287092
2016-11-16 10:02:27 +00:00
Eugene Leviant afaa934304 [ELF] Add Section() to expression object
This allows making symbols containing ADDR(section) synthetic,
and defining synthetic symbols outside SECTIONS block.

Differential revision: https://reviews.llvm.org/D25441

llvm-svn: 287090
2016-11-16 09:49:39 +00:00
George Rimar f3c143188d [ELF] - Better diagnostic for "can't create dynamic relocation" error.
Patch improves message to show locations for
"can't create dynamic relocation" error.

Differential revision: https://reviews.llvm.org/D26548

llvm-svn: 287086
2016-11-16 08:34:19 +00:00
Davide Italiano 197f07e650 [ELF] Update lld now that ELF.h in LLVM has been converted to Expected.
llvm-svn: 287082
2016-11-16 05:11:30 +00:00
Rui Ueyama 23f441d3ac Add -no-threads option that negates the effect of -threads.
llvm-svn: 287072
2016-11-16 01:39:50 +00:00
Rui Ueyama c91f716643 PDB: Add "* Linker *" module.
The added module contains nothing, but it is still useful as a test
to ensure that we are emitting modules that can be read back.

llvm-svn: 287071
2016-11-16 01:10:46 +00:00
Rafael Espindola e5cd5ecd2e Use one task per iteration in parallel_for_loop.
This seems far more natural. A user can create larger chunks if the
overhead is too large.

With this linking xul with "--threads --build-id=sha1 goes from
13.938177535 to 11.035953538 seconds on linux.

llvm-svn: 287042
2016-11-15 22:13:16 +00:00
Rui Ueyama c3dcf99441 [COFF] Fix manifest resource file creation on Windows.
createManifestRes was generating a MemoryBuffer from a TemporaryFile,
keeping the data but removing the file, before passing the file path
to CVTRES.exe, leading to the following error:

  CVTRES : fatal error CVT1101: cannot open 'C:\Users\user\AppData\
  Local\Temp\lld-output-resource-bfee19.res' for reading

With this, we instead create a new TemporaryFile before passing it to cvtres.

Patch from Rudy Pons!

llvm-svn: 287034
2016-11-15 21:25:20 +00:00
Rui Ueyama 569851f1d6 Partially revert r287009: Remove trailing whitespace.
This reverts part of r287009 because I accidentally changed binary files.

llvm-svn: 287010
2016-11-15 19:09:13 +00:00
Rui Ueyama d7cfb1b6dd Remove trailing whitespace.
llvm-svn: 287009
2016-11-15 19:07:17 +00:00
Rui Ueyama 8249214299 Refactor symbol version assignmnt code.
The code to handle symbol versions is getting tricky and hard to
understand, so it is probably time to simplify it. This patch does
the following.

 - Add `DemangledSyms` variable to SymbolTable so that we don't
   need to pass it around to findDemangled.
 - Define `initDemangledSyms` to initialize the variable lazily.
 - hasExternCpp is removed because we no longer have to initialize
   the map eagerly.
 - scanScriptVersion is split.
 - Comments are updated.

llvm-svn: 287002
2016-11-15 18:41:52 +00:00
Rui Ueyama baf7ee3c5e Rename variables of type SymbolVersion.
In this file, `sym` was used for both SymbolBody and SymbolVersion
although the two are completely different.

llvm-svn: 286992
2016-11-15 17:51:09 +00:00
Rui Ueyama 2a00b8461c Rename function to avoid function overloading.
We had two functions with the same name to read completely different
things. That was confusing.

llvm-svn: 286991
2016-11-15 17:51:07 +00:00
Eugene Leviant 65262bdc0c [ELF] Don't check Out<ELFT>::RelaPlt as it's always non-zero. NFC
llvm-svn: 286955
2016-11-15 13:19:21 +00:00
Eugene Leviant 6380ce2212 [ELF] Convert DynamicSection to input section.
This patch introduces the following changes:
- DynamicSection now inherits InputSection<ELFT> and was moved
  to SyntheticSections.h/.cpp.
- Link and Entsize fields of DynamicSection are propagated to 
  its output section
- In<ELFT>::SyntheticSections was removed.
- Finalization of synthetic sections was removed from 
  OutputSection<ELFT>::finalize. Now finalizeSyntheticSections is
  used instead.

Differential revision: https://reviews.llvm.org/D26603

llvm-svn: 286950
2016-11-15 12:26:55 +00:00
George Rimar 7beff42f8f [ELF] - Do not create reserved symbols in case of relocatable output.
This patch stops creating symbols like __ehdr_start, 
_end/_etext_edata,__tls_get_addr when using -r.

This fixes PR30984.

Differential revision: https://reviews.llvm.org/D26600

llvm-svn: 286941
2016-11-15 08:19:02 +00:00
George Rimar 463984d4bf [ELF] - Better diagnostic for relative relocation to an absolute value error.
Patch adds a filename to that error message.

I faced next error when debugged one of FreeBSD port:
error: relocation R_X86_64_PLT32 cannot refer to absolute symbol __tls_get_addr

error message was poor and this patch improves it to show the locations 
of symbol declaration and using.

Differential revision: https://reviews.llvm.org/D26508

llvm-svn: 286940
2016-11-15 08:07:14 +00:00
George Rimar 308752e474 [ELF] - Allow symbols of STT_NOTYPE to be associated with SHT_SYMTAB sections.
Found this when tried to link lang/ccl FreeBSD port.
Issue is very close to D23201.
This is the reason of lang/ccl port link fail.

GNU assembler 2.17.50 [FreeBSD] 2007-07-03 could generate broken objects,
where notype symbols are associated with symtab:
...
[ 9] .symtab           SYMTAB           0000000000000000  00003c78
     0000000000006858  0000000000000018          10   803     8
...
192: 000000000000000d     0 NOTYPE  LOCAL  DEFAULT    9 _cons_org

Patch allows to handle such objects.

Differential revision: https://reviews.llvm.org/D26613

llvm-svn: 286939
2016-11-15 07:56:28 +00:00
Vitaly Buka 029d730bad Avoid creating reference from nullptr.
Summary:
getFile() can return nullptr. This usually happens when Rels is empty so
the reference is never used. Still UBSAN complains.

Reviewers: rafael

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D26662

llvm-svn: 286937
2016-11-15 07:32:51 +00:00
Rui Ueyama f83806a8ad Identify object files compiled with cl.exe /GL.
Object files compiled with cl.exe /GL contain intermediate code for LTO.
We can't (and don't want to) interpret such code, but we should print
out a user-friendly error message.

Differential Revision: https://reviews.llvm.org/D26647

llvm-svn: 286921
2016-11-15 01:01:51 +00:00
Vitaly Buka 4cf112c6f2 Fix heap-use-after-free coff::createPDB
Summary:
getInputSections returns std::vector by value and ArrayRef
pointed to destroyed temporarily.

Reviewers: ruiu

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D26630

llvm-svn: 286880
2016-11-14 20:21:41 +00:00
Rui Ueyama ec2595d2e1 Attempt to fix freaky bot.
I don't really understand what is failing on lld-x86_64-darwin13 bot,
but this patch should at least reduces the number of moving parts.

llvm-svn: 286876
2016-11-14 19:50:10 +00:00
Davide Italiano ccf2fa1cb6 [ELF] Clarify why `lld -flavor gnu` is used.
Pointed out by Rafael!

llvm-svn: 286857
2016-11-14 18:20:20 +00:00
Rafael Espindola f7a1744803 Fix program header propagation.
Propagate program headers by walking the commands, not the
sections. This allows us to propagate program headers even from
sections that don't end up in the output.

Fixes pr30997.

llvm-svn: 286837
2016-11-14 15:39:38 +00:00
George Rimar e784395c99 [ELF] - Ignore -Map,-M and --cref options.
-M, --print-map Write map file on standard output
-Map MAPFILENAME Write map file
--cref	Output cross reference table

This is relative to PR30973.

Next FreeBSD ports were atm failing because of 
lack of -Map, -M and --cref:

sysutils/openipmi
emulators/adamem
devel/jwasm
net/pimd
devel/k8048
textproc/libcrm114
lang/micropython
net/mrouted
print/openprinting

After this patch all of them can be link fine.

llvm-svn: 286831
2016-11-14 14:45:11 +00:00
Rafael Espindola 6a53737c92 Delay removing empty section commands. NFC.
To fix pr30997 we will have to keep them a bit longer, this just
splits that part of the diff.

llvm-svn: 286827
2016-11-14 14:33:49 +00:00
Rafael Espindola 07fe612973 Factor out removeEmptyCommands. NFC.
llvm-svn: 286826
2016-11-14 14:23:35 +00:00
Rafael Espindola 337f903c6c Factor out placeOrphanSections. NFC.
llvm-svn: 286824
2016-11-14 14:13:32 +00:00
George Rimar 95d7cfdf50 [ELF] - Simplify edata-etext.s test. NFC.
llvm-svn: 286810
2016-11-14 10:33:53 +00:00
George Rimar d8b27769c8 [ELF] - format. NFC.
llvm-svn: 286805
2016-11-14 10:14:18 +00:00
George Rimar 0b2d374c01 [ELF] - format. NFC.
llvm-svn: 286804
2016-11-14 10:05:53 +00:00
George Rimar 59d9b4b4bc [ELF] - Removed trailing whitespace. NFC.
llvm-svn: 286803
2016-11-14 10:04:45 +00:00
George Rimar da841c161d [ELF] - Removed unused code. NFC.
This branch was unused I believe,
as Tok can never be empty.

llvm-svn: 286802
2016-11-14 10:03:54 +00:00
George Rimar 92ca6f4b7d [ELF] - Fix mistype. NFC.
llvm-svn: 286801
2016-11-14 09:56:35 +00:00
George Rimar 4bcb9d6c3c [ELF] - Untabify. NFC.
llvm-svn: 286800
2016-11-14 09:33:38 +00:00
Eugene Leviant 22eb026886 [ELF] Convert StringTableSection to input section
Differential revision: https://reviews.llvm.org/D26549

llvm-svn: 286799
2016-11-14 09:16:00 +00:00
George Rimar bb6c01e7c3 [ELF] - Add support for locals list in version script.
Previously we did not support anything except "local: *", patch changes that.

Actually GNU rules of proccessing wildcards are more complex than that (http://www.airs.com/blog/archives/300):
There are 2 iteration for wildcards, at first iteration "*" wildcards are ignored and handled at second iteration.

Since we previously decided not to implement such complex rules,
I suggest solution that is implemented in this patch. So for "local: *" case nothing changes,
but if we have wildcarded locals,
they are processed before wildcarded globals. 

This should fix several FreeBSD ports, one of them is jpeg-turbo-1.5.1 and
currently blocks about 5k of ports.

Differential revision: https://reviews.llvm.org/D26395

llvm-svn: 286713
2016-11-12 07:04:15 +00:00
George Rimar 117c933304 [ELF] - Fixed comment. NFC.
llvm-svn: 286712
2016-11-12 06:27:42 +00:00
Rui Ueyama da139f793c Remove dead code.
llvm-svn: 286698
2016-11-12 01:32:34 +00:00
Rui Ueyama 09e0b5f2c9 Emit Section Contributions.
Differential Revision: https://reviews.llvm.org/D26211

llvm-svn: 286684
2016-11-12 00:00:51 +00:00
Rafael Espindola ad004470fe Add missing REQUIRES.
llvm-svn: 286666
2016-11-11 23:10:22 +00:00
Rafael Espindola 1960bcd710 Don't sort sections in -r links.
Unlike gold, bfd, gas or MC we were putting exidx sections first since
they are ro.

The spec doesn't explicitly say that they must come after, but it is
definitely more convenient for the consumer, matches other producers
and matches other areas in ELF (like SHT_GROUP) where sections are
ordered in a natural way.

llvm-svn: 286659
2016-11-11 22:43:27 +00:00
Mehdi Amini 16e25c8d4c Fix wrong formatting in lld introduced in r286561 (NFC)
Pointed out by Davide.

llvm-svn: 286649
2016-11-11 22:28:19 +00:00
Rafael Espindola eb1c2a0dac Make test more strict. NFC.
It was non-obvious that a CHECK was not matching the following section.

llvm-svn: 286643
2016-11-11 22:07:15 +00:00
Rafael Espindola d4372f783b Avoid a crash with -r and .comment.
We would create a MergeInputSection for the synthetic .comment and
crash trying to add it to a regular output section.

With this we just don't add the synthetic section with -r. That is
consistent with gold that doesn't create .note.gnu.gold-version with
-r.

llvm-svn: 286635
2016-11-11 21:36:25 +00:00
Peter Collingbourne cd513a41c1 Bitcode: Clean up error handling for certain bitcode query functions.
The functions getBitcodeTargetTriple(), isBitcodeContainingObjCCategory(),
getBitcodeProducerString() and hasGlobalValueSummary() now return errors
via their return value rather than via the diagnostic handler.

To make this work, re-implement these functions using non-member functions
so that they can be used without the LLVMContext required by BitcodeReader.

Differential Revision: https://reviews.llvm.org/D26532

llvm-svn: 286623
2016-11-11 19:50:24 +00:00
Greg Clayton a6ccd19035 Fix code to deal with recent LLVM changes.
https://reviews.llvm.org/D26526

llvm-svn: 286598
2016-11-11 16:23:47 +00:00
Eugene Leviant ad5cfa26f9 [ELF] Attempt to fix PPC buildbot
llvm-svn: 286590
2016-11-11 13:24:49 +00:00
George Rimar e893689331 [ELF] - Use backward slashes inside response files
Patch replaces forward slashes with backward inside response.txt

This is https://llvm.org/bugs/show_bug.cgi?id=30951.

Differential revision: https://reviews.llvm.org/D26443

llvm-svn: 286589
2016-11-11 13:23:13 +00:00
Eugene Leviant 17afb64d4f [ELF] Set 'Live = true' in SyntheticSection ctor. NFC.
llvm-svn: 286588
2016-11-11 13:03:58 +00:00
Eugene Leviant ad4439e802 [ELF] Convert .got section to input section
Differential revision: https://reviews.llvm.org/D26498

llvm-svn: 286580
2016-11-11 11:33:32 +00:00
Teresa Johnson 1e390897ba Mirror the llvm changes that split Bitcode/ReaderWriter.h
The change in D26502 splits ReaderWriter.h, which contains the APIs
into both the BitReader and BitWriter libraries, into BitcodeReader.h
and BitcodeWriter.h.

Change lld uses to the appropriate split header, removing it
completely in one case where it wasn't needed.

llvm-svn: 286568
2016-11-11 05:35:22 +00:00
Mehdi Amini c1edf566b9 Prevent at compile time converting from Error::success() to Expected<T>
This would trigger an assertion at runtime otherwise.

Differential Revision: https://reviews.llvm.org/D26482

llvm-svn: 286562
2016-11-11 04:29:25 +00:00
Mehdi Amini 41af43092c Make the Error class constructor protected
This is forcing to use Error::success(), which is in a wide majority
of cases a lot more readable.

Differential Revision: https://reviews.llvm.org/D26481

llvm-svn: 286561
2016-11-11 04:28:40 +00:00
Rui Ueyama 82664d9d4c Remove a member from InputSectionData and use the pool instead.
llvm-svn: 286557
2016-11-11 03:54:59 +00:00
Davide Italiano c520e18ce0 [lld/COFF] Don't round alignment if it's already a power-of-two.
This matches link.exe behaviour.

Differential Revision:  https://reviews.llvm.org/D26372

llvm-svn: 286553
2016-11-11 02:53:48 +00:00
Rui Ueyama 169e7c4edc Call flush() after llvm_shutdown().
llvm_shutdown could write something to outs or errs,
so we need to flush them after calling llvm_shutdown.

llvm-svn: 286548
2016-11-11 02:16:15 +00:00
Rui Ueyama 049e045c3a Handle Archive::children's error proerly.
The previous code didn't make sense at all. Now an error condition
is handled with fatal(). Thanks to Mehdi for pointing out the issue.

llvm-svn: 286547
2016-11-11 02:09:28 +00:00
Davide Italiano b69f38f7a7 [ELF] Remove extra semicolon to placate GCC. NFCI.
llvm-svn: 286529
2016-11-11 00:05:41 +00:00
Reid Kleckner f47c3bb8db Make the .idata$4 and .idata$5 import lib sections 8 bytes on x64
The MSVC linker relies on this invariant to produce a valid import
table. More ASan tests pass in a stage 2 build now. They still fail when
using LLD since there are no PDBs for the dynamic ASan runtime.

llvm-svn: 286499
2016-11-10 20:38:58 +00:00
Rui Ueyama 3da3f06dd3 Include version string into ".comment" section.
Summary:
This patch adds a ".comment" section to an output. The comment
section contains the linker's version string. You can now
find out whether a binary is created by LLD or not using objdump
command like this.

  $ objdump -s -j .comment foo

  foo:     file format elf64-x86-64

  Contents of section .comment:
   0000 00474343 3a202855 62756e74 7520342e  .GCC: (Ubuntu 4.
   0010 382e342d 32756275 6e747531 7e31342e  8.4-2ubuntu1~14.
   ...
   00c0 766d2f74 72756e6b 20323835 38343629  vm/trunk 285846)
   00d0 004c696e 6b65723a 204c4c44 20342e30  .Linker: LLD 4.0
   00e0 2e302028 7472756e 6b203238 36343036  .0 (trunk 286406
   00f0 2900                                 ).

Compilers emits .comment section as well, so the output contains
both compiler and linker information.

Alternative considered:

I first tried to add a SHT_NOTE section because GNU gold does that.
A NOTE section starts with a header which contains content type.
It turned out that ld.gold sets type NT_GNU_GOLD_VERSION to their
NOTE section. So the NOTE type is only for GNU gold (surprise!)

Next, I tried to create ".linker-version" section. However, it seems
that reusing the existing ".comment" section is better because 1)
other tools already know about .comment section and is able to strip
it and 2) the result contans not only linker info but also compiler
info.

Differential Revision: https://reviews.llvm.org/D26487

llvm-svn: 286496
2016-11-10 20:20:37 +00:00
Davide Italiano 604d313816 [LTO] Call llvm_shutdown on early exit.
In a non-LTO build is a nop. In a LTO build, we deallocate/destroy
managed static and this allows us to get the output of, e.g.,
-time-passes without performing a full shutdown.

Differential Revision:  https://reviews.llvm.org/D26517

llvm-svn: 286493
2016-11-10 19:39:05 +00:00
Rafael Espindola 0e876cfb2e Replace duplicated '16' with a named constant.
Thanks to Michael Spencer for the suggestion.

llvm-svn: 286462
2016-11-10 15:41:34 +00:00
Rafael Espindola 9f0c4bb795 Parse relocations only once.
Relocations are the last thing that we wore storing a raw section
pointer to and parsing on demand.

With this patch we parse it only once and store a pointer to the
actual data.

The patch also changes where we store it. It is now in
InputSectionBase. Not all sections have relocations, but most do and
this simplifies the logic. It also means that we now only support one
relocation section per section. Given that that constraint is
maintained even with -r with gold bfd and lld, I think it is OK.

llvm-svn: 286459
2016-11-10 14:53:24 +00:00
George Rimar e93e0adbb5 Reverted r286451 "[ELF] - Allow separate form for -f (alias for -auxiliary)."
Though the patch was technically correct,
the only FreeBSD port (noticed atm) that tried using it was
www/mod_jk. And it seems just passed gcc option to linker by mistake:

"-Wl,-L-L/usr/local/lib -Wl,-rpath,/usr/local/lib -Wl,-fstack-protector -Wl,-fstack-protector -o mod_jk.la "

Given that it is an easy mistake to make, reverting for now.

llvm-svn: 286458
2016-11-10 14:48:39 +00:00
George Rimar f5a0ef97f5 [ELF] - Allow separate form for -f (alias for -auxiliary).
Without that FreeBSD port was failing with next confuxing error:
/usr/bin/ld: error: unknown argument: -fstack-protector

llvm-svn: 286451
2016-11-10 14:07:15 +00:00
Eugene Leviant 12e8a92acd [ELF] Make SyntheticSection::writeTo pure virtual. NFC.
llvm-svn: 286445
2016-11-10 12:50:59 +00:00
Eugene Leviant 41ca327b5e [ELF] Convert .got.plt section to input section
Differential revision: https://reviews.llvm.org/D26349

llvm-svn: 286443
2016-11-10 09:48:29 +00:00
George Rimar 1a33c0f242 [ELF] - Implemented --symbol-ordering-file option.
Patch allows to pass a symbols file to linker.
LLD will map symbols to sections and sort sections
in output according to symbol ordering file.

That can help to reduce the startup time and/or
amount of pagefaults during startup.

Also, interesting benchmark result was produced by Rafael Espíndola. 
After applying the symbols file for clang he timed compiling 
X86MCTargetDesc.ii to an object file.  

The page faults went from just
56,988 to 56,946 since most faults are not in the binary.
Running time went from 4.403053515 to 4.178112244. 
The speedup seems to be because of better cache
locality.

Differential revision: https://reviews.llvm.org/D26130

llvm-svn: 286440
2016-11-10 09:05:20 +00:00
Rui Ueyama 35e007515f Add comment and simplify code a bit. NFC.
llvm-svn: 286422
2016-11-10 00:12:28 +00:00
Rui Ueyama 1bdaf3e30c Remove an overloaded function to simplify.
This version of addRegular is almost identical to the other except
it lacked "size" parameter.

llvm-svn: 286416
2016-11-09 23:37:40 +00:00
Rafael Espindola e08e78df6d Make OutputSectionBase a class instead of class template.
The disadvantage is that we use uint64_t instad of uint32_t for some
value in 32 bit files. The advantage is a substantially simpler code,
faster builds and less code duplication.

llvm-svn: 286414
2016-11-09 23:23:45 +00:00
Rui Ueyama 58026af7f0 Simplify parseEmulation. NFC.
llvm-svn: 286406
2016-11-09 22:32:43 +00:00
Rui Ueyama df5d14d6e7 Split OutputSection ctor. NFC.
llvm-svn: 286405
2016-11-09 22:32:42 +00:00
Simon Atanasyan 93214b7018 [ELF][MIPS] Attempt to fix buildbot
llvm-svn: 286401
2016-11-09 21:46:42 +00:00
Simon Atanasyan fa03b0fafa [ELF][MIPS] Convert .MIPS.abiflags section to synthetic input section
Previously, we have both input and output section for .MIPS.abiflags.
Now we have only one class for .MIPS.abiflags, which is MipsAbiFlagsSection.
This class is a synthetic input section.

.MIPS.abiflags sections are handled as regular sections until
the control reaches Writer. Writer then aggregates all sections
whose type is SHT_MIPS_ABIFLAGS to create a single synthesized
input section. The synthesized section is then processed normally
as if it came from an input file.

llvm-svn: 286398
2016-11-09 21:37:06 +00:00
Simon Atanasyan ce02cf0099 [ELF][MIPS] Convert .reginfo and .MIPS.options sections to synthetic input sections
Previously, we have both input and output sections for .reginfo and
.MIPS.options. Now for each such sections we have one synthetic input
sections: MipsReginfoSection and MipsOptionsSection respectively.

Both sections are handled as regular sections until the control reaches
Writer. Writer then aggregates all sections whose type is SHT_MIPS_REGINFO
or SHT_MIPS_OPTIONS to create a single synthesized input section. In that
moment Writer also save GP0 value to the MipsGp0 field of the corresponding
ObjectFile. This value required for R_MIPS_GPREL16 and R_MIPS_GPREL32
relocations calculation.

Differential revision: https://reviews.llvm.org/D26444

llvm-svn: 286397
2016-11-09 21:36:56 +00:00
Rui Ueyama d43b7e8d10 Disable cpio test on Windows again.
The last fix is unlikely to solve the issue. Reverting it to the
original file.

llvm-svn: 286393
2016-11-09 20:54:01 +00:00
Rui Ueyama 2816452503 Attempt to fix green dragon bot.
llvm-svn: 286392
2016-11-09 20:42:34 +00:00
Rafael Espindola 6ff570a395 Make Discarded a InputSection.
It was quite confusing that it had SectionKind of Regular, but was not
actually a InputSection.

llvm-svn: 286379
2016-11-09 16:55:07 +00:00
George Rimar 470de71177 [ELF] - Add separate form for -R alias.
During link of devel/chrpath (FreeBSD port), found next issue:
/usr/bin/ld: error: unclosed comment in a linker script
/usr/bin/ld: error: line 1: unknown directive: �
/usr/bin/ld: error: ��

Problem was not obvious and the reason was that we did not accept
the separate form of -R. While invocation line contained it:
cc -Wl,-R /usr/local/lib -o prog prog.c

CPIO file produced contained /usr/local/lib file. 
Which looks because of reasons above
contained inside the content of whole lib folder, 
and it then was passed as an input and
proccessed as linker script.

llvm-svn: 286378
2016-11-09 16:38:15 +00:00
Rafael Espindola 77dbe9a405 Add a convenience getObj method. NFC.
llvm-svn: 286370
2016-11-09 14:39:20 +00:00
George Rimar 1feb2f7d93 [ELF] - Enable reproduce-error.s under windows.
Differential revision: https://reviews.llvm.org/D26445

llvm-svn: 286364
2016-11-09 13:55:30 +00:00