Commit Graph

6871 Commits

Author SHA1 Message Date
George Rimar dfbbbc86a1 [ELF] Linkerscript: fixed bug about commands processing.
It was possible situation about some commands just were not processed
(were skipped) because of a bug appeared when constraint checking used.

Testcase is attached.

llvm-svn: 281818
2016-09-17 09:50:10 +00:00
George Rimar 8034d49db5 [ELF] - Fixed mistypes in comments. NFC.
llvm-svn: 281817
2016-09-17 07:31:49 +00:00
Rui Ueyama 70efa2f251 Attempt to fix buildbot.
llvm-svn: 281805
2016-09-17 02:34:50 +00:00
Rui Ueyama 4dc07becd0 Use named struct instead of unnamed std::pair.
It is important to give members names for readability.

llvm-svn: 281803
2016-09-17 02:23:40 +00:00
Rui Ueyama 3ff27f49cd Define a versatile utility function and use it instead of a single purpose one.
llvm-svn: 281802
2016-09-17 02:15:28 +00:00
Rui Ueyama 027a9e8787 Remove unnecessary namespace specifiers.
llvm-svn: 281801
2016-09-17 02:10:15 +00:00
Rui Ueyama bb542b3f0c Partially fill Info stream with proper values.
llvm-svn: 281795
2016-09-16 22:51:17 +00:00
Rafael Espindola 373343bd5b Try to fix a few bots.
llvm-svn: 281794
2016-09-16 22:47:34 +00:00
Rafael Espindola aab6d5c52a Put SHF_ALLOC sections first, even with linker scripts.
This matches gold and bfd, and is pretty much required by some linker
scripts. They end with commands like

foo   0 : { *(bar) }

if we put any SHF_ALLOC sections after they can have an address that
is too low.

llvm-svn: 281778
2016-09-16 21:29:07 +00:00
Rui Ueyama b2a0abdf0e Rename SortSectionPolicy::IgnoreConfig to None.
Because it corresponds to SORT_NONE. None was renamed Default.

llvm-svn: 281776
2016-09-16 21:14:55 +00:00
Rafael Espindola 7c3ff2eb58 Only process commands in a ONLY_IF_RO if it matches.
This matches bfd behavior. It also makes future changes simpler as we
don't have to worry about ignoring these commands in multiple places

llvm-svn: 281775
2016-09-16 21:05:36 +00:00
Rafael Espindola e71a3f8ae1 Fix constraint checking in ONLY_IF_RO.
We have to look at all the relevant input sections at once.

llvm-svn: 281772
2016-09-16 20:34:02 +00:00
George Rimar be394db376 [ELF] - Implemented --sort-section cmd line option and SORT_NONE script command.
This fixes Bug 30385 - SORT_NONE not implemented,

`SORT_NONE' disables section sorting by ignoring the command line
section sorting option.

That is why this patch also implements --sort-section option.

Description of sorting rules
available at https://sourceware.org/binutils/docs/ld/Input-Section-Wildcards.html 

Differential revision: https://reviews.llvm.org/D24604

llvm-svn: 281771
2016-09-16 20:21:55 +00:00
George Rimar 395281cfc3 Recommit r281721 "[ELF] - Linkerscript: implement EXCLUDE_FILE in the middle of a input section description."
With fix for 2 bots. Details about the fix performed is on a review page.

Initial commit message:
This is PR30387:

From PR description:
We fail to parse

SECTIONS
{
  foo :
  {
    *(sec0 EXCLUDE_FILE (zed1.o) sec1  EXCLUDE_FILE (zed2.o) sec2 )
  }
}
The semantics according to bfd are:

Include sec1 from every file but zed1.o
Include sec2 from every file but zed2.o
Include sec0 from every file

Patch implements the support.

Differential revision: https://reviews.llvm.org/D24650

llvm-svn: 281754
2016-09-16 17:42:10 +00:00
Eugene Leviant 20d031948e Improve handling ASSERT outside SECTIONS block
Differential revision: https://reviews.llvm.org/D24450

llvm-svn: 281740
2016-09-16 15:30:47 +00:00
Rafael Espindola d31907957a Change how we compute offsets with linker scripts.
This fixes pr30367, but more importantly, it changes how we compute offsets.

Now offset computation in a walk over linker script commands, like the
rest of assignAddresses. IMHO this is simpler to understand and if we
ever have to create multiple outputsections or chunks to change how we
handle test/ELF/linkerscript/alternate-sections.s it should be easier
to do it.

llvm-svn: 281736
2016-09-16 15:10:23 +00:00
Ismail Donmez e7174ffcd8 Fix shared library build
llvm-svn: 281728
2016-09-16 14:10:23 +00:00
George Rimar ceae630c9b Reverted r281721 ("[ELF] - Linkerscript: implement EXCLUDE_FILE in the middle of a input section description.").
It broke build bot:
http://lab.llvm.org:8011/builders/lld-x86_64-darwin13/builds/27508

llvm-svn: 281723
2016-09-16 13:30:18 +00:00
George Rimar 4906c7f5c4 [ELF] - Linkerscript: implement EXCLUDE_FILE in the middle of a input section description.
This is PR30387:

From PR description:
We fail to parse

SECTIONS
{
  foo :
  {
    *(sec0 EXCLUDE_FILE (zed1.o) sec1  EXCLUDE_FILE (zed2.o) sec2 )
  }
}
The semantics according to bfd are:

Include sec1 from every file but zed1.o
Include sec2 from every file but zed2.o
Include sec0 from every file

Patch implements the support.

Differential revision: https://reviews.llvm.org/D24650

llvm-svn: 281721
2016-09-16 13:07:02 +00:00
Rui Ueyama b28c6d495d Use functions in DebugInfoPDB to create dummy PDB file.
I don't think we are creating valid PDB file here,
but it is okay because we have never created valid PDBs before.

llvm-svn: 281704
2016-09-16 04:32:33 +00:00
Rui Ueyama 2644cd1d88 Demangle symbols in "undefined symbol" error message.
llvm-svn: 281698
2016-09-16 03:52:45 +00:00
Rui Ueyama 783afd667d Check /pdb output using llvm-pdbdump.
test/COFF/rsds.test checks only RSDS directory in a DLL and
didn't check the validity of the PDF file produced.
(Technically the produced PDB is not valid because it is really
a stub, but this test is still good to have.)

llvm-svn: 281678
2016-09-15 23:14:40 +00:00
Rui Ueyama 8e8296fad8 Fix old copy-n-paste errors.
llvm-svn: 281671
2016-09-15 22:26:07 +00:00
Rui Ueyama 1d99ab3925 Create PDB.h and move code to remove unnecessary #includes.
llvm-svn: 281670
2016-09-15 22:24:51 +00:00
Rafael Espindola 4ec013ac83 Error out instead of producing a corrupt PT_LOAD.
What bfd and gold do is give up in putting the headers in the PT_LOAD
and just start the PT_LOAD in the second page.

llvm-svn: 281660
2016-09-15 21:22:11 +00:00
Rafael Espindola 1d98d6292f Make sure we create all necessary PT_LOADs.
We were some times stopping early when using linker scripts.

llvm-svn: 281647
2016-09-15 19:36:01 +00:00
George Rimar 575208cabd [ELF] - Linkerscript: implemented SORT_BY_INIT_PRIORITY.
This is PR30386,

SORT_BY_INIT_PRIORITY is a keyword can be used to sort sections by numerical value of the
GCC init_priority attribute encoded in the section name.

Differential revision: https://reviews.llvm.org/D24611

llvm-svn: 281646
2016-09-15 19:15:12 +00:00
Rui Ueyama 7f38299919 Use SuperBlock struct defined in MSFCommon.h.
llvm-svn: 281643
2016-09-15 18:55:18 +00:00
Rafael Espindola 3adbbc3891 Check the return of getInteger.
llvm-svn: 281608
2016-09-15 13:36:44 +00:00
George Rimar 31c25ae90a Recommit r281318 "[ELF] - Versionscript: support mangled symbols with the same name."
Previouly bot was failing:
http://lab.llvm.org:8011/builders/clang-with-lto-ubuntu/builds/413/steps/test-stage1-compiler/logs/stdio
Fixed possible segfault, so commit should bix the buildbot.

Initial commit message:

This is PR30312. Info from bug page:

Both of these symbols demangle to abc::abc():
_ZN3abcC1Ev
_ZN3abcC2Ev
(These would be abc's complete object constructor and base object constructor, respectively.)
however with "abc::abc()" in the version script only one of the two receives the symbol version.

Patch fixes that.
It uses testcase created by Ed Maste (D24306).

Differential revision: https://reviews.llvm.org/D24336

llvm-svn: 281605
2016-09-15 12:44:38 +00:00
Rafael Espindola 97bdc7220b Handle arbitrary expressions in DATA_SEGMENT_RELRO_END.
llvm-svn: 281521
2016-09-14 19:14:01 +00:00
Rafael Espindola 0289c5bbcd Add an interesting test.
llvm-svn: 281515
2016-09-14 18:06:02 +00:00
Rafael Espindola 77af7e48b7 Add a test showing we handle .tbss sections in linker scripts.
llvm-svn: 281496
2016-09-14 16:40:33 +00:00
Simon Atanasyan d10a5ea19e [ELF] Do not adjust TLS symbol value when produce relocatable object
When the linker generates a relocatable object there is no TLS program
header and we should not adjust TLS symbols value.

llvm-svn: 281494
2016-09-14 16:26:19 +00:00
Rafael Espindola be94e1b630 Move helper function higher in the file. NFC
This just makes a followup patch easier to read.

llvm-svn: 281482
2016-09-14 14:32:08 +00:00
George Rimar d73ef1738b [ELF] - Implemented --section-start, -Ttext, -Tdata, -Tbss options.
--section-start=sectionname=org
Locate a section in the output file at the absolute address given by org. 
You may use this option as many times as necessary to locate multiple sections in the command line.
 org must be a single hexadecimal integer; for compatibility with other linkers, 
you may omit the leading `0x' usually associated with hexadecimal values. 
Note: there should be no white space between sectionname, the equals sign (“<=>”), and org.

-Tbss=org
-Tdata=org
-Ttext=org
Same as --section-start, with .bss, .data or .text as the sectionname.

Differential revision: https://reviews.llvm.org/D24294

llvm-svn: 281458
2016-09-14 13:07:13 +00:00
Rafael Espindola d88d7166a8 Use murmurhash2 instead of fnv.
It is substantially faster by processing 8 bytes at a time.

llvm-svn: 281454
2016-09-14 11:32:57 +00:00
Eugene Leviant e05336ffa1 [ELF] Replace HasContents with HasSections. NFC
llvm-svn: 281449
2016-09-14 08:32:36 +00:00
Rui Ueyama 2d7fe598f2 Turn a no-op assignment into an assertion.
r279456 guarantees that this condition is always satisfied.

llvm-svn: 281426
2016-09-14 00:09:50 +00:00
Rui Ueyama 38dbd3eea9 Simplify InputFile ownership management.
Previously, all input files were owned by the symbol table.
Files were created at various places, such as the Driver, the lazy
symbols, or the bitcode compiler, and the ownership of new files
was transferred to the symbol table using std::unique_ptr.
All input files were then free'd when the symbol table is freed
which is on program exit.

I think we don't have to transfer ownership just to free all
instance at once on exit.

In this patch, all instances are automatically collected to a
vector and freed on exit. In this way, we no longer have to
use std::unique_ptr.

Differential Revision: https://reviews.llvm.org/D24493

llvm-svn: 281425
2016-09-14 00:05:51 +00:00
George Rimar 84ba4ae11d revert: [ELF] - Versionscript: support mangled symbols with the same name.
Something broked BBots:
281318 failed on step 9:
http://lab.llvm.org:8011/builders/clang-with-lto-ubuntu/builds/413

r281317 built step 9 green:
http://lab.llvm.org:8011/builders/clang-with-lto-ubuntu/builds/415

Initial revision commits were:
This is PR30312. Info from bug page:

Both of these symbols demangle to abc::abc():
_ZN3abcC1Ev
_ZN3abcC2Ev
(These would be abc's complete object constructor and base object constructor, respectively.)
however with "abc::abc()" in the version script only one of the two receives the symbol version.

Patch fixes that.
It uses testcase created by Ed Maste (D24306).

Differential revision: https://reviews.llvm.org/D24336

llvm-svn: 281411
2016-09-13 22:26:12 +00:00
Rui Ueyama 1e2e8eae5d [ELF] Set EF_ARM_EABI_VER5 for ARM
Without this flag set, an AArch64 Linux kernel won't try to load the executable
(even if a 32 bit arm kernel will run the binary just fine).

Patch by Martin Storsjö!

Differential revision: https://reviews.llvm.org/D24471

llvm-svn: 281394
2016-09-13 20:51:32 +00:00
Rui Ueyama ea26504c19 Split scanVersionScript. NFC.
llvm-svn: 281393
2016-09-13 20:51:30 +00:00
Rui Ueyama fbde710497 Add comments.
llvm-svn: 281388
2016-09-13 20:41:06 +00:00
Rui Ueyama 3e9037d419 Inline small funciton.
llvm-svn: 281381
2016-09-13 19:56:27 +00:00
Rui Ueyama a75b7a48f1 Fix comments.
llvm-svn: 281380
2016-09-13 19:56:25 +00:00
Rafael Espindola 10897f1807 Enable merging of SHF_MERGE sections with linker scripts.
This also fixes the related problem of non SHF_MERGE sections with
different flags not being merged.

Fixes pr30355.

llvm-svn: 281338
2016-09-13 14:23:14 +00:00
Rafael Espindola 28c1597ad9 Refactor duplicated code. NFC.
llvm-svn: 281329
2016-09-13 13:00:06 +00:00
Rafael Espindola 17c35832a0 Turn createKey into a static helper. NFC.
llvm-svn: 281325
2016-09-13 12:25:30 +00:00
Rafael Espindola 540893a2e2 Delete dead code.
We already handle this is createSections.

llvm-svn: 281320
2016-09-13 11:28:22 +00:00
George Rimar e2051efcbe [ELF] - Versionscript: support mangled symbols with the same name.
This is PR30312. Info from bug page:

Both of these symbols demangle to abc::abc():
_ZN3abcC1Ev
_ZN3abcC2Ev
(These would be abc's complete object constructor and base object constructor, respectively.)
however with "abc::abc()" in the version script only one of the two receives the symbol version.

Patch fixes that.
It uses testcase created by Ed Maste (D24306).

Differential revision: https://reviews.llvm.org/D24336

llvm-svn: 281318
2016-09-13 10:45:39 +00:00
Chris Bieneman 5a805df1a5 [CMake] Fix linker-as-ld to symlink instead of copy lld
Summary: This test fails if you're building with BUILD_SHARED_LIBS because the LLVM libraries are found via @rpath. Symlinking instead of copying should be sufficiently robust for the test case.

Reviewers: llvm-commits

Subscribers: davide

Differential Revision: https://reviews.llvm.org/D24476

llvm-svn: 281271
2016-09-12 22:38:43 +00:00
Rui Ueyama 0eb2a1bd7a Add comments.
llvm-svn: 281265
2016-09-12 21:44:29 +00:00
Davide Italiano f6c1d2c158 [MachO] Factor out a fair amount of duplicated code. NFCI.
llvm-svn: 281260
2016-09-12 21:07:26 +00:00
Davide Italiano 3582242aa3 [Cmake] Use Cmake's default RPATH for unittest.
Similarly to what was done in r280791 for llvm/.
This should fix a bunch of failures I saw while
trying a BUILD_SHARED_LIBS build on MacOS.
Still there are some failures, but this is a step
forward.

Thanks a lot to Chris Bieneman for the suggested
fix (in PR30345)

llvm-svn: 281256
2016-09-12 20:44:53 +00:00
Rafael Espindola 7bd37870bc Simplify handling of /DISCARD/. NFC.
llvm-svn: 281222
2016-09-12 16:05:16 +00:00
Rafael Espindola c7e1e03498 Store an ArrayRef for Data in InputSectionData.
llvm-svn: 281210
2016-09-12 13:13:53 +00:00
Rafael Espindola 54f1614ec1 Revert "Revert "Compact InputSectionData from 64 to 48 bytes. NFC.""
This reverts commit r281096.

The previous link errors should be fixed by r281208.

llvm-svn: 281209
2016-09-12 13:06:10 +00:00
Eugene Leviant 99da752980 [ELF/AArch64] Implement some UABS relocs
Differential revision: https://reviews.llvm.org/D24403

llvm-svn: 281202
2016-09-12 10:02:41 +00:00
Davide Italiano 35065193f1 [MachO] Remove code accidentally cut'n'pasted 3 times.
It wasn't harmful, just goofy. It's weird to see how this has
fallen through the crack without anybody noticing for so long.

llvm-svn: 281148
2016-09-10 20:41:26 +00:00
Michael J. Spencer 0cb8a70adc [ELF] Fix memory leak in BinaryFile handling.
llvm-svn: 281129
2016-09-10 01:42:43 +00:00
Hans Wennborg efcc5c4390 Move the contents of test/elf to test/ELF
Having two directories with the same name modulo case does not work well
on Windows. The new test/elf directory was added in r281108. I assume
the intention was to add the test file to the existing test/ELF dir.

llvm-svn: 281115
2016-09-09 22:46:16 +00:00
Michael J. Spencer a9424f39c4 [ELF] Add support for -b binary
Implemented by building an ELF file in memory.

elf, default, and binary match gold behavior.

Differential Revision: https://reviews.llvm.org/D24060

llvm-svn: 281108
2016-09-09 22:08:04 +00:00
Rui Ueyama 478f8eb6ef Add comments.
llvm-svn: 281098
2016-09-09 21:35:38 +00:00
Rafael Espindola 78fe670994 Revert "Compact InputSectionData from 64 to 48 bytes. NFC."
This reverts commit r281084.

The link was failing on some bots. No idea why. I will try to
reproduce it on Monday.

llvm-svn: 281096
2016-09-09 21:20:30 +00:00
Rafael Espindola 82621dcb10 Compact InputSectionData from 64 to 48 bytes. NFC.
llvm-svn: 281084
2016-09-09 19:42:11 +00:00
Saleem Abdulrasool c1b5f19262 test: adjust the GUID
Although the GUID seems to be stable across test runs now, it seems to be
unstable across hosts.  Lets be a bit more lax about the reading of the RSDS
record.

llvm-svn: 281083
2016-09-09 19:41:46 +00:00
Saleem Abdulrasool 88f6407542 COFF: make builds more reproducible
Change the way we calculate the build id to use MD5 to give reproducible build
ids. Previously we would generate random bytes for the build id GUID.

llvm-svn: 281079
2016-09-09 19:26:03 +00:00
George Rimar cd574a5e46 Recommit [ELF] - Versionscript: do not treat non-wildcarded names as wildcards.
Fixed code that was not checked before on windows for me, because of testcases that are
disabled on that platform atm.

Inital commit message:
"[ELF] - Versionscript: do not treat non-wildcarded names as wildcards."
Previously we incorrectly handled cases when symbol name in extern c++ tag
was enclosed in quotes. Next case was treated as wildcard:

GLIBCXX_3.4 {                                                                   
    extern "C++" {  
    "aaa*"
   }
But it should have not. Quotes around aaa here means that we should have do exact
name matching.
That is PR30268 which has name with pointer is interpreted as wildcard by lld:

extern "C++" {                                                              
    "operator delete[](void*)";

Patch fixes the issue.

Differential revision: https://reviews.llvm.org/D24229

llvm-svn: 281049
2016-09-09 14:35:36 +00:00
George Rimar 6368525eea Revert r281045, it broke BB.
Broken BB:
http://lab.llvm.org:8011/builders/lld-x86_64-darwin13/builds/27211

llvm-svn: 281046
2016-09-09 14:16:00 +00:00
George Rimar b5e77c47fb Recommit [ELF] - Versionscript: do not treat non-wildcarded names as wildcards.
Fixed code that was not checked by testcases that are disabled on windows.

Inital commit message:
"[ELF] - Versionscript: do not treat non-wildcarded names as wildcards."
Previously we incorrectly handled cases when symbol name in extern c++ tag
was enclosed in quotes. Next case was treated as wildcard:

GLIBCXX_3.4 {                                                                   
    extern "C++" {  
    "aaa*"
   }
But it should have not. Quotes around aaa here means that we should have do exact
name matching.
That is PR30268 which has name with pointer is interpreted as wildcard by lld:

extern "C++" {                                                              
    "operator delete[](void*)";

Patch fixes the issue.

Differential revision: https://reviews.llvm.org/D24229

llvm-svn: 281045
2016-09-09 13:58:07 +00:00
George Rimar 08b1862caf [ELF] - Revert r281038 to see if that unbreaks build bot.
http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-ubuntu-fast/builds/19703

llvm-svn: 281041
2016-09-09 12:56:55 +00:00
George Rimar d220384376 [ELF] - Versionscript: do not treat non-wildcarded names as wildcards.
Previously we incorrectly handled cases when symbol name in extern c++ tag
was enclosed in quotes. Next case was treated as wildcard:

GLIBCXX_3.4 {                                                                   
    extern "C++" {  
    "aaa*"
   }
But it should have not. Quotes around aaa here means that we should have do exact
name matching.
That is PR30268 which has name with pointer is interpreted as wildcard by lld:

extern "C++" {                                                              
    "operator delete[](void*)";

Patch fixes the issue.

Differential revision: https://reviews.llvm.org/D24229

llvm-svn: 281038
2016-09-09 12:22:28 +00:00
Eugene Leviant 56b21c869e Linker script: implement AT [ (address) ] for PHDR
Differential revision: https://reviews.llvm.org/D24340

llvm-svn: 281024
2016-09-09 09:46:16 +00:00
Rui Ueyama a60058c8f5 Fix -output option.
Usually, options that are longer than one character can be preceded
either by "-" or "--", but options starting with "o" are exceptions
because they conflict with "-o" option. They have to be preceded by
"--".

llvm-svn: 281004
2016-09-09 00:25:56 +00:00
Rui Ueyama 86c5fb8296 Fix bug in -nostdlib.
We still have to skip a token inside SEARCH_DIR() when -nostdlib is
specified. Previuosly, we didn't skip it, so it caused a parse error.

llvm-svn: 281001
2016-09-08 23:26:54 +00:00
Rui Ueyama c442cff96e Define writeUint and use it. NFC.
llvm-svn: 280994
2016-09-08 21:46:21 +00:00
Davide Italiano e02ba98f8f [ELF] Fix DT_NEEDED value.
Differential Revision: https://reviews.llvm.org/D24363

llvm-svn: 280990
2016-09-08 21:18:38 +00:00
Ed Maste e349b6da2c ELF: clarify error when we don't know the output format
lld differs from GNU ld in that it does not have a built-in default
target emulation. Emulation is always specified via the -m option, or
obtained from the object file(s) being linked. In most cases at least
one ELF object is included in the link, so the emulation is known.

When using lld's (not yet committed) -b binary support with -r, to
convert a binary file into an ELF object we do not have a known
emulation. The error message previously emitted in this case
"-m or at least a .o file required" is accurate but does not offer
much insight. Add text to the error message to give a hint why -m or an
object file is required.

Differential Revision:	https://reviews.llvm.org/D24348

llvm-svn: 280989
2016-09-08 21:06:29 +00:00
Rafael Espindola c0028d3d3b Reduce templating. NFC.
llvm-svn: 280986
2016-09-08 20:47:52 +00:00
Rui Ueyama 881406e787 Define '-undefined foo' as an alias to '-undefined=foo'.
llvm-svn: 280985
2016-09-08 20:35:29 +00:00
Ed Maste 2b68ada188 ELF: Report original emulation name in "unknown emulation" error
A trailing _fbsd is stripped from emulation names, but if the result was
still not a valid emulation the error was somewhat confusing.

For example,

% ld.lld -m elf_amd64_fbsd
unknown emulation: elf_amd64

Use the original emulation name in error messages.

Differential Revision:	https://reviews.llvm.org/D24357

llvm-svn: 280983
2016-09-08 19:36:22 +00:00
Ed Maste 21e2be6403 ELF: accept -m elf_amd64 as an alias for -m elf_x86_64
In the FreeBSD world x86_64 still has its original name, amd64. Accept
it as an alias.

Differential Revision:	https://reviews.llvm.org/D24356

llvm-svn: 280982
2016-09-08 19:30:47 +00:00
Rafael Espindola 868fc9279e Handle globs in global symbol names.
Fixes pr28775.

llvm-svn: 280947
2016-09-08 14:50:55 +00:00
Rafael Espindola 4d1e4d76ee Use a protected destructor instead of a virtual one.
llvm-svn: 280941
2016-09-08 14:11:08 +00:00
Rafael Espindola 042a3f209b Compute section names only once.
This simplifies error handling as there is now only one place in the
code that needs to consider the possibility that the name is
corrupted. Before we would do it in every access.

llvm-svn: 280937
2016-09-08 14:06:08 +00:00
Rafael Espindola 16853bb00f Pack InputSectionData from 72 to 64 bytes. NFC.
llvm-svn: 280925
2016-09-08 12:33:41 +00:00
George Rimar 9fc6143a5b [ELF] - Add virtual destructor to LinkerScriptBase class. NFC.
Absence of it caused a clang warning:
warning: 'lld:🧝:LinkerScriptBase' has virtual functions but non-virtual destructor [-Wnon-virtual-dtor]

At fact we don't need it here because do not destroy this object by
base pointer.

llvm-svn: 280916
2016-09-08 09:59:13 +00:00
Eugene Leviant 36fac7f0d0 Linker script: implement ALIGNOF
Differential revision: https://reviews.llvm.org/D24141

llvm-svn: 280915
2016-09-08 09:08:30 +00:00
Simon Atanasyan 919a58c456 [ELF][MIPS] Fix initialization of TLS-related GOT entries
This patch allows static linking of TLS code. To do that it fixes
GOT entries initialization.

If TLS-related GOT entry created for a preemptible symbol i.e. has
a corresponding dynamic relocation, leave the entry initialized by zero.
Write down adjusted TLS symbol's values otherwise. For the adjustments
calculation use offsets for thread-local storage.

https://www.linux-mips.org/wiki/NPTL

llvm-svn: 280914
2016-09-08 09:07:19 +00:00
Simon Atanasyan af52f6af22 [ELF][MIPS] Update the comment
llvm-svn: 280913
2016-09-08 09:07:12 +00:00
Eugene Leviant 3967ea05a9 Set entry address to 0x0 if no _start symbol
Differential revision: https://reviews.llvm.org/D23925

llvm-svn: 280912
2016-09-08 08:57:51 +00:00
George Rimar 6c55f0e35e [ELF] - Apply clang-format to LinkerScript.cpp, NFC.
llvm-svn: 280911
2016-09-08 08:20:30 +00:00
George Rimar 884e786d38 [ELF] - Linkerscript: simplify access to templated methods from parser.
Previous way of accessing templated methods was a bit bulky,
Patch introduces small interface based solution.

Differential revision: https://reviews.llvm.org/D23872

llvm-svn: 280910
2016-09-08 08:19:13 +00:00
Rui Ueyama 8239617acd Rename test file. NFC.
llvm-svn: 280904
2016-09-08 03:08:05 +00:00
Ed Maste 4d9947ba09 ELF: Add -Qy as ignored option
GCC passes it by default on powerpc64 on FreeBSD. GNU ld claims "this
option is ignored for SVR4 compatibility", so we can ignore it too.

Differential Revision:	https://reviews.llvm.org/D24313

llvm-svn: 280864
2016-09-07 21:10:25 +00:00
Rui Ueyama a3b7546cf7 Fix inconsistent indentation.
llvm-svn: 280860
2016-09-07 20:50:41 +00:00
Rafael Espindola 0a75850fa7 Move field to the base class. NFC.
llvm-svn: 280858
2016-09-07 20:41:19 +00:00
Rafael Espindola 664c6522fa Delete dead field. NFC.
llvm-svn: 280856
2016-09-07 20:37:34 +00:00
Ed Maste 5ad1cbeecb ELF: add version script void function test case
After r280733 we use LLVM's demangler in lld. As a result we no longer
have a discrepancy between f() and f(void) on FreeBSD (due to an issue
with FreeBSD's system demangler).

Restore a test case for a void arg function.

Differential Revision:	https://reviews.llvm.org/D24305

llvm-svn: 280831
2016-09-07 17:51:00 +00:00
Rafael Espindola 4a2350e841 Enable test on windows.
It looks like it was disable just because we were missing a demangler.

llvm-svn: 280805
2016-09-07 12:09:10 +00:00
George Rimar bcbbb3987d [ELF] - Sort command line options. NFC.
llvm-svn: 280803
2016-09-07 11:43:18 +00:00
George Rimar a14b13d867 [ELF] - Linkerscript: create multiple output sections for inputs with different attributes.
Previously we combined sections by name if linkerscript was used.
For that we had to disable SHF_MERGE handling temporarily, but then
found that implementing it properly will require additional complexity layers like
subsections or something.
At the same time looks we can live with multiple output sections approach for now.
That patch do this change.

Differential revision: https://reviews.llvm.org/D24127

llvm-svn: 280801
2016-09-07 10:46:07 +00:00
George Rimar 51da9c7178 [ELF] - Fix for: PR29093 - version script does not support [chars] wildcards
GNU ld supports [chars] wildcards in version scripts, to match a single instance of any of the chars.
Here is an extern example from libstdc++'s version script in FreeBSD:

extern "C++"
{
...

std::locale::_[T-Za-z]*;                                                                                                       
std::[A-Zm]*;                                                            
std::n[^u]*;                                                             
std::nu[^m]*;                                                            
std::num[^e]*;
...

}

Patch adds support for scripts above. This is PR29093.

Differential revision: https://reviews.llvm.org/D23803

llvm-svn: 280799
2016-09-07 10:19:44 +00:00
George Rimar 8825a5c6ef [ELF] - Enable testcases that uses demangler to run under windows and escape quotes around "C++".
Previously testcases were enabled only for shell.
r280733 added c++ itanium demangler to lld and we can enable them fully.

Also this change make quotes to be escaped:

extern "C++" -> extern \"C++\", which worked before just because we are dropping tokens 
quotes internally at this moment.

llvm-svn: 280797
2016-09-07 09:59:29 +00:00
Eugene Leviant db741e7203 Support ABSOLUE keyword in symbol assignments
This patch allows making section defined symbols absolute:
.foo : {
  begin_foo = ABSOLUTE(.);
  *(.foo)
}

Differential revision: https://reviews.llvm.org/D24135

llvm-svn: 280788
2016-09-07 07:08:43 +00:00
Rui Ueyama adcdb664cb Simplify a boolean expression by using the De Morgan's law.
llvm-svn: 280766
2016-09-06 22:50:48 +00:00
Rafael Espindola 5b0fb8f4d5 Fix shared library build.
llvm-svn: 280753
2016-09-06 21:06:55 +00:00
Rafael Espindola d1942133e8 Use the demangler in llvm.
llvm-svn: 280733
2016-09-06 19:17:14 +00:00
Petr Hosek 5baa1c7641 [ELF] Add support for -no-gc-sections flag
This flag is supported by both BFD ld and gold and is occasionally
used to negate the effect of -gc-sections flag.

Differential Revision: https://reviews.llvm.org/D24270

llvm-svn: 280729
2016-09-06 18:28:49 +00:00
Rui Ueyama 25150e8b0d Add a comment.
llvm-svn: 280724
2016-09-06 17:46:43 +00:00
Rafael Espindola 719f55d379 Mark R_GOTREL_FROM_END as a relative expression.
Fixes pr30282.

llvm-svn: 280709
2016-09-06 13:57:15 +00:00
George Rimar ff1f29e0f6 [ELF] - Linkerscript: implemented FILL command as alias for =fillexpr
Patch implements FILL just as alias for =fillexpr. 
This allows to make implementation much shorted and simpler than D24186.

Differential revision: https://reviews.llvm.org/D24227

llvm-svn: 280708
2016-09-06 13:51:57 +00:00
Simon Atanasyan 643729d277 [ELF][MIPS] Support R_MIPS_TLS_DTPREL64 / R_MIPS_TLS_TPREL64 relocations calculation
llvm-svn: 280666
2016-09-05 15:42:43 +00:00
Simon Atanasyan 875951eceb [ELF][MIPS] Support R_MIPS_TLS_DTPREL32 / R_MIPS_TLS_TPREL32 relocations calculation
llvm-svn: 280665
2016-09-05 15:42:39 +00:00
Simon Atanasyan d9ea656021 [ELF][MIPS] Do not create a hidden definition for __tls_get_addr on MIPS
On most architectures the linker is required to optimize away any
references to __tls_get_addr in case of static linking. As usual
a special case is MIPS - libc defines __tls_get_addr itself because
there are no TLS optimizations for this architecture.

llvm-svn: 280664
2016-09-05 15:42:29 +00:00
Simon Atanasyan 65b2461cfd [ELF][MIPS] Do not emit DT_REL[A]COUNT for MIPS targets
It looks like MIPS dynamic loader does not support RELCOUNT tag.
Both gold/bfd linkers does not emit this tag on MIPS. I will investigate
the problem further but for now it is better to behave like GNU linkers.

llvm-svn: 280630
2016-09-04 17:40:12 +00:00
Duncan P. N. Exon Smith 9f71057d69 ReaderWriter: Use ilist_noalloc_traits for TrieEdge, NFC
Adopt r280128 in lld, specializing ilist_alloc_traits rather than
reinventing the wheel.

llvm-svn: 280566
2016-09-03 01:29:36 +00:00
Rui Ueyama dad2b88c7d Update comments.
llvm-svn: 280548
2016-09-02 22:15:08 +00:00
Simon Atanasyan eaeafb2b4f [ELF] PR30221 - linker script expression parser does not accept '~'
The patch adds support for both '-' and '~' unary expressions. Also it
brings support for signed numbers is expressions.

https://llvm.org/bugs/show_bug.cgi?id=30221

Differential revision: https://reviews.llvm.org/D24128

llvm-svn: 280546
2016-09-02 21:54:35 +00:00
George Rimar c91930a17f [ELF] - Use std::regex instead of hand written logic in elf::globMatch()
Use std::regex instead of hand written matcher.

Patch based on code and ideas of Rui Ueyama.

Differential revision: https://reviews.llvm.org/D23829

llvm-svn: 280544
2016-09-02 21:17:20 +00:00
Rui Ueyama ffdc16051f Move a test file to the right place.
llvm-svn: 280541
2016-09-02 20:46:06 +00:00
Rui Ueyama 66ba9f08b9 Remove useless file prefix.
Differential Revision: https://reviews.llvm.org/D24207

llvm-svn: 280540
2016-09-02 20:40:53 +00:00
Rui Ueyama b397ab5895 Use od instead of hexdump.
od is defined by POSIX and exists since version 1 AT&T Unix.
hexdump is not part of any standard as far as I know.
So od is a better choice than hexdump.

Differential Revision: https://reviews.llvm.org/D24205

llvm-svn: 280536
2016-09-02 20:20:04 +00:00
Rui Ueyama 6af4016f6d Simplify. NFC.
llvm-svn: 280533
2016-09-02 19:49:27 +00:00
Rui Ueyama fee70ea8c6 Rename UnresolvedPolicy::Error -> UnresolvedPolicy::ReportError.
"Error" looks like it is indicating a parse error. "Error" actually
instructs the later process to report an error if there's an error
condition. Thus the new name.

llvm-svn: 280529
2016-09-02 19:36:29 +00:00
Rui Ueyama 6c7ad13f89 Add -nostdlib.
llvm-svn: 280528
2016-09-02 19:20:33 +00:00
Rui Ueyama a27eeccade Dispatch without hash table lookup.
Cmd used to be the single central place to dispatch. It is not longer
the case because we have a logic for readProvideOrAssignment().
This patch removes the hash table so that evrything is in a single
function. This is slightly verbose but should improve readability.

Differential Revision: https://reviews.llvm.org/D24200

llvm-svn: 280524
2016-09-02 18:52:41 +00:00
Rui Ueyama 626e0b08ac Add comments.
llvm-svn: 280515
2016-09-02 18:19:00 +00:00
Rui Ueyama fa12b8bd1a Remove temoprary files.
Previously, we created temporary files using llvm::sys::fs::createTemporaryFile
and removed them using llvm::FileRemover. This is error-prone as it is easy to
forget creating FileRemover instances after creating temporary files.
There is actually a temporary file leak bug.

This patch introduces a new class, TemporaryFile, to manage temporary files
in the RAII style.

Differential Revision: https://reviews.llvm.org/D24176

llvm-svn: 280510
2016-09-02 17:34:17 +00:00
Rui Ueyama 951cfb6aae Fix potential test failures.
Windows does not allow opened files to be removed. This patch
fixes two types of errors.

 - Output file being the same as input file. Because LLD itself
   holds a file descriptor of the input file, it cannot create an
   output file with the same name as a new file.

 - Removing files before releasing MemoryBuffer objects.

These tests are not failing no because MemoryBuffer happens to
decide not to use mmap on these files. But we shouldn't rely on
that behavior.

llvm-svn: 280507
2016-09-02 17:19:28 +00:00
George Rimar 9f2f7ad98b [ELF] - Linkerscript: add support for suffixes in numbers.
Both bfd and gold accept:
foo = 1K;
bar = 1M;
zed = 1H;

And lowercase forms: k, m, h.
Patch adds support for that.

Differential revision: https://reviews.llvm.org/D24194

llvm-svn: 280494
2016-09-02 16:01:42 +00:00
George Rimar b952ece2df [ELF] - Fix for: bug 30237 - lld does not implement -f option
FreeBSD's libstdc++ build (used on tier-2 architectures) uses GNU ld's 
-f <name> option, which sets the DT_AUXILIARY field to the specified name.
Multiple -f options may be specified and the DT_AUXILIARY entries 
will be added in the order in which they appear.

Patch implements that option.

Differential revision: https://reviews.llvm.org/D24139

llvm-svn: 280475
2016-09-02 09:13:05 +00:00
Rui Ueyama 8a425f03dd Add comments.
llvm-svn: 280423
2016-09-01 22:48:05 +00:00
Petr Hosek fdfcb796e1 [ELF] Do not omit debug sections when computing build-id
The primary use of build-id is in debugging, hence omitting debug
sections when computing it significantly reduces its usability as
changes in debug section content wouldn't alter the build-id.

Differential Revision: https://reviews.llvm.org/D24120

llvm-svn: 280421
2016-09-01 22:43:03 +00:00
Rafael Espindola d59509eecc Add missing REQUIRES.
llvm-svn: 280375
2016-09-01 14:59:11 +00:00
Rafael Espindola 3a9eef1670 Sign extend a value before passing it to the Target.
This is what InputSectionBase<ELFT>::relocate does and we need to be
consistent. The other option would be to be more explicit about which
relocations are signed and which are not, and sign extend only when
appropriated. That would require extending the target interface.

llvm-svn: 280366
2016-09-01 13:52:52 +00:00
Eugene Leviant 97403d15ee Eliminate LayoutInputSection class
Previously we used LayoutInputSection class to correctly assign
symbols defined in linker script. This patch removes it and uses
pointer to preceding input section in SymbolAssignment class instead.

Differential revision: https://reviews.llvm.org/D23661

llvm-svn: 280348
2016-09-01 09:55:57 +00:00
Rafael Espindola 79202c378f Fix the implementation of R_386_GOTPC and R_386_GOTOFF.
They were both pointing to the start of the got, not the end.

Fixes pr28924.

llvm-svn: 280310
2016-08-31 23:24:11 +00:00
Rafael Espindola 7f4f9cd546 Use getSize to find the size of a section. NFC.
llvm-svn: 280305
2016-08-31 23:01:13 +00:00
Rui Ueyama 7caf48cc5b Initialize RelativeRel for AMDGPU.
Target->RelativeRel is used for all platforms, but AMDGPU did
not send that member.

Fixes bug 30227 - RelativeRel is used, but not initialized for AMDGPU.

Differential Revision: https://reviews.llvm.org/D24100

llvm-svn: 280291
2016-08-31 21:04:25 +00:00
Rui Ueyama 95769b4a29 Linker script: support VERSION command.
Summary:
VERSION commands define symbol versions. The grammar of the
commnad is as follows

  VERSION { version-script-commands }

where version-script-commands is

  [ name ] { version-definitions }.

Note that we already support version-script-commands because
it is being used for version script command.

This patch is based on George's patch https://reviews.llvm.org/D23609

Reviewers: grimar

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D24089

llvm-svn: 280284
2016-08-31 20:03:54 +00:00
Ivan Krasin 8baccc2f19 Fix UBSan bot by not passing NULL into memcpy src.
Summary:
UBSan complains like the following:
tools/lld/COFF/Writer.cpp:97:15: runtime error: null pointer passed as argument 2, which is declared to never be null

The reason is that the vector could be empty.

Reviewers: rsmith

Subscribers: Eugene.Zelenko, kcc

Differential Revision: https://reviews.llvm.org/D24050

llvm-svn: 280259
2016-08-31 17:23:05 +00:00
Petr Hosek e5d3ca5031 [ELF] Linkerscript: define symbols outside SECTIONS
Symbol assignments outside of SECTIONS command need to be created
even when SECTIONS command is not used.

Differential Revision: https://reviews.llvm.org/D23751

llvm-svn: 280252
2016-08-31 15:31:17 +00:00
Rafael Espindola 0509876f3f Remove redundant argument. NFC.
llvm-svn: 280243
2016-08-31 13:49:23 +00:00
Rafael Espindola 8db87291ef Internalize common variables.
Before this lld was always creating common symbols itself. It worked,
but prevented them from being internalized when possible.

Now it preserves common symbols is the bitcode and they are internalized.

Fixes pr30184.

llvm-svn: 280242
2016-08-31 13:42:08 +00:00
Rafael Espindola e7553e4eac Delete unnecessary template.
llvm-svn: 280237
2016-08-31 13:28:33 +00:00
Rafael Espindola a6c9744a6c Delete DefinedBitcode.
Given that we almost always want to handle it as DefinedRegular, just
use DefinedRegular.

llvm-svn: 280226
2016-08-31 12:30:34 +00:00
Davide Italiano 29fa6ab7b1 [LTO/InputFiles] Merge two ifs into one. NFCI.
llvm-svn: 280225
2016-08-31 12:27:47 +00:00
Davide Italiano 30ed8106ad [LTO] Simplify unnamed_addr handling logic. NFCI.
llvm-svn: 280224
2016-08-31 12:20:46 +00:00
Simon Atanasyan e5532a12f7 [ELF][MIPS] Support R_MIPS_HIGHER / R_MIPS_HIGHEST relocations calculation
llvm-svn: 280223
2016-08-31 11:47:21 +00:00
Simon Atanasyan 97519cba2e [ELF][MIPS] Inline function. NFC
llvm-svn: 280222
2016-08-31 11:47:17 +00:00
George Rimar 20b6598c10 [ELF] - Remove VersionScriptParser class and move the members to ScriptParser
Patch removes VersionScriptParser class and moves the members to ScriptParser
It opens road for implementation of VERSION linkerscript command.

Differential revision: https://reviews.llvm.org/D23774

llvm-svn: 280212
2016-08-31 09:08:26 +00:00
George Rimar ebf1da565c [ELF] - Fix (partial) for bug 28843 - Make sure we handle options with opposing meanings.
As stated in PR28843:

we should handle command lines with

-target1-rel -target1-abs
--demangle --no-demangle
Patch implements this for specified options.
There are probably other conflicting options can exist,
so fix is called "partial".

Differential revision: https://reviews.llvm.org/D23867

llvm-svn: 280211
2016-08-31 08:53:21 +00:00
Eugene Leviant aa49819162 Add DT_REL(A)COUNT tag to .dynamic section
This patch groups relative relocations in a single block
in combrelocs mode and adds DT_RELCOUNT or DT_RELACOUNT
tag to .dynamic section

Differential revision: https://reviews.llvm.org/D23661

llvm-svn: 280210
2016-08-31 08:51:39 +00:00
George Rimar 9503f6d211 [ELF] - Introduce DiscardPolicy instead of 3 relative bool fields.
DiscardPolicy is enum replacing several boolean options. 
This approach is not only consistent with what we use for 
unresolveds (UnresolvedPolicy), but also should help to solve a problem 
of options with opposing meanings, mentioned in PR28843

Differential revision: https://reviews.llvm.org/D23868

llvm-svn: 280209
2016-08-31 08:46:30 +00:00
George Rimar f21aade0d8 [ELF] - Introduce StripPolicy instead of Config->StripAll/StripDebug flags.
This approach is not only consistent with UnresolvedPolicy, 
but also should help to solve a problem 
of options with opposing meanings, mentioned in PR28843

Differential revision: https://reviews.llvm.org/D23869

llvm-svn: 280206
2016-08-31 08:38:11 +00:00
Eugene Leviant 20889c51b7 Allow adding start/end symbols to any section
Allows adding start and/or end symbols to special output sections,
like .eh_frame_hdr, which aren't lists of regular input sections. 

Differential revision: https://reviews.llvm.org/D23716

llvm-svn: 280205
2016-08-31 08:13:33 +00:00
Eugene Leviant e4f590faeb Allow .eh_frame_hdr to be placed before .eh_frame
Differential revision: https://reviews.llvm.org/D24041

llvm-svn: 280203
2016-08-31 07:43:50 +00:00
Rafael Espindola cceb92a075 Pass Binding instead of IsWeak to addBitcode.
We were computing the binding on both the caller and callee.

llvm-svn: 280156
2016-08-30 20:53:26 +00:00
Davide Italiano 35af5b3d21 [LTO] Fix the logic for dropping unnamed_addr.
Differential Revision:  https://reviews.llvm.org/D24037

llvm-svn: 280144
2016-08-30 20:15:03 +00:00
George Rimar 96659df09c [ELF] - Linkerscript: implemented ADDR command.
ADDR(section)
Return the absolute address (the VMA) of the named section.

Used in the wild, eg.: https://searchcode.com/file/53617342/arch/x86/kernel/vmlinux.lds.S

Differential revision: https://reviews.llvm.org/D23913

llvm-svn: 280070
2016-08-30 09:54:01 +00:00
George Rimar a2496cbed4 [ELF] - Fix for: bug 29115 - linkerscript does not support non-wildcard filename spec.
FreeBSD/mips script has non-wildcard filename specifications:
.text :
{
 start.o(.text*)

Patch adds support for that, this is PR29115.

Differential revision: https://reviews.llvm.org/D23839

llvm-svn: 280069
2016-08-30 09:46:59 +00:00
George Rimar 7af6452927 [ELF] - Use early return. NFC.
This addresses forgotten review comment for r280067:
"[ELF] - Versionscript: support wildcards for extern "c++" tag."

llvm-svn: 280068
2016-08-30 09:39:36 +00:00
George Rimar 397cd87a69 [ELF] - Versionscript: support wildcards for extern "c++" tag.
Previously for extern keyword only names in quotes (exact match) was supported.
Patch adds support for wildcards, so next scripts can be handled properly:

LIBSAMPLE_1.0 {
   global:            
     extern "C++" {  
       foo*;   
   };                  
 };

Differential revision: https://reviews.llvm.org/D23794

llvm-svn: 280067
2016-08-30 09:35:03 +00:00
George Rimar c3ec9d0cbf [ELF] - Cleanup of scanVersionScript(): do not change local Demangled variable. NFC.
llvm-svn: 280066
2016-08-30 09:29:37 +00:00
Rui Ueyama 2c8f1f048c Make lld actually compatible with gold in terms of filler handling.
GNU gold handles output section fillers as 32-bit values.
This patch makes LLD compatible with that behavior.

Differential revision: https://reviews.llvm.org/D23181

llvm-svn: 280018
2016-08-29 22:01:21 +00:00
Saleem Abdulrasool dcbf2cbfca COFF: disambiguate make_unique (NFC)
This disambiguates `llvm::make_unqiue` and `std::make_unique` for the Windows
buildbots.

llvm-svn: 280014
2016-08-29 21:33:01 +00:00
Saleem Abdulrasool 8fcff934ba COFF: add beginnings of debug directory creation
The IMAGE_FILE_HEADER structure contains a (RVA, size) to an array of
COFF_DEBUG_DIRECTORY records. Each one of these records contains an RVA to a OMF
Debug Directory. These OMF debug directories are derived into newer types such
as PDB70, PDB20, etc. This constructs a PDB70 structure which will allow us to
associate a GUID with a build to actually tie debug information.

llvm-svn: 280012
2016-08-29 21:20:46 +00:00
Eugene Leviant 933dae7435 Implement support for --build-id=uuid switch
Differential revision: https://reviews.llvm.org/D23349

llvm-svn: 279810
2016-08-26 09:55:37 +00:00
Eugene Leviant 0bbb600a9c [ELF] Added test case for PROVIDE and PROVIDE_HIDDEN within section
llvm-svn: 279809
2016-08-26 09:48:32 +00:00
Hemant Kulkarni 3ed7dc705a Fix test corresponding to change r279770
llvm-svn: 279775
2016-08-25 20:43:49 +00:00
George Rimar 449cf3e44a Removed trailing whitespace. NFC.
llvm-svn: 279729
2016-08-25 10:39:04 +00:00
George Rimar 86ce267a4a [ELF] - Implemented --oformat binary option.
-oformat output-format
`-oformat' option can be used to specify the binary format for the output object file.

Patch implements binary format output type.

Differential revision: https://reviews.llvm.org/D23769

llvm-svn: 279726
2016-08-25 09:05:47 +00:00
Nico Weber d08aa5c391 fix typo "varaibles"
llvm-svn: 279638
2016-08-24 16:36:41 +00:00
Peter Smith a52864a78c Canonicalize output section name for .ARM.exidx sections
The ARM Exception handling ABI requires that all ARM exception index
table sections have a prefix of .ARM.exidx and are combined into a
single contiguous block either in their own output section or as part
of another output section.
    
In general clang will output a single .ARM.exidx section per object,
but will use .ARM.exidx.<section name> when -ffunction-sections is used.
    
This change canonicalizes the names of sections with the .ARM.exidx
prefix to just .ARM.exidx, which ensures that there is only a single
output section.

Differential Revision: https://reviews.llvm.org/D23775

llvm-svn: 279617
2016-08-24 09:08:54 +00:00
Rafael Espindola cc3dd629ee Add support for '|' in expressions.
llvm-svn: 279480
2016-08-22 21:33:35 +00:00
Petr Hosek 5b4f6c6b28 [ELF] Only print symbol name when it is available
Not only symbols (like sections) have names, in case where we
fail to create relocation against such symbol, we should not
print out an empty string, instead we should print a generic
message.

Differential Revision: https://reviews.llvm.org/D23731

llvm-svn: 279459
2016-08-22 19:01:53 +00:00
Duncan P. N. Exon Smith c9e8bc191c ADT: Remove uses of ilist_*sentinel_traits, NFC
llvm-svn: 279458
2016-08-22 18:59:33 +00:00
Petr Hosek 901948a205 [ELF] ICF should respect section alignment
When performing ICF, we have to respect the alignment requirement
of each section within each group.

Differential Revision: https://reviews.llvm.org/D23732

llvm-svn: 279456
2016-08-22 18:53:09 +00:00
Petr Hosek 4f7a5c3bb4 [ELF] Define __ehdr_start symbol
This symbol can be used by the program to examine its own headers.

Differential Revision: https://reviews.llvm.org/D23750

llvm-svn: 279452
2016-08-22 18:44:04 +00:00
Rui Ueyama 189b871a62 Format.
llvm-svn: 279415
2016-08-22 04:55:41 +00:00
Rui Ueyama 464daadc3d Do not add .interp, .dynamic nor .eh_frame_hdr to segments just by type.
Summary:
We previously added these output sections to segments just by type.
Therefore, if there's a PHDRS command like this

  PHDRS {
    headers PT_PHDR PHDRS;
    interp PT_INTERP;
  }

  SECTIONS {
    . = SIZEOF_HEADERS;
    .interp : { *(.interp) } :text
  }

then .interp was added to "interp" segment even though the linker
is not instructed to do so by SECTIONS command. This patch removes
the default behavior to simplify.

Differential Revision: https://reviews.llvm.org/D23702

llvm-svn: 279414
2016-08-22 04:55:20 +00:00
Saleem Abdulrasool 9f8bc029bd COFF: hoist a local variable
Create a local variable for the rdata section.  NFC.

llvm-svn: 279407
2016-08-21 23:05:43 +00:00
Ed Schouten 21483f5636 Add R_386_TLS_LE as a relocation having an implicit addend.
TLS on i386 in non-PIE/PIC code seems broken right now, because we don't
properly add the addend encoded in the instruction to the resulting
offset when processing R_386_TLS_LE relocations.

Extend one of the existing tests for TLS on i686 to use an addend.

PR:		https://llvm.org/bugs/show_bug.cgi?id=29068
Reviewed by:	ruiu
Differential Revision:	https://reviews.llvm.org/D23741

llvm-svn: 279368
2016-08-20 10:54:51 +00:00
George Rimar 3e6833b4b2 [ELF] - Fix for PR28976 - Corrupted section contents when using linker scripts
This is fix for PR28976.

Problem was that in scanRelocs, we computed relocation offset too early 
for case when linkerscript was used. Patch fixes the issue 
delaying the calculation.

Differential revision: https://reviews.llvm.org/D23655

llvm-svn: 279264
2016-08-19 15:46:28 +00:00
George Rimar e1937bb524 [ELF] - Give automatically generated __start_* and __stop_* symbols default visibility.
This patch is opposite to D19024, which made this symbols to be hidden by default.

Unfortunately FreeBSD loader wants to see
start_set_modmetadata_set/stop_set_modmetadata_set in the dynamic symbol table. 
They were not placed there because had hidden visibility.

Patch makes them to have default visibility again.

Differential revision: https://reviews.llvm.org/D23552

llvm-svn: 279262
2016-08-19 15:36:32 +00:00
George Rimar 03e0560da7 [ELF] - Linkerscript: set correct dynamic tag entries values when LS is used.
Previously DT_PREINIT_ARRAYSZ, DT_INIT_ARRAYSZ and DT_FINI_ARRAYSZ
were set to zero when lincerscript was used becase sections sizes are
calculated later that were taken.

Patch delays values calculation for these entries. Testcase is provided.

Differential revision: https://reviews.llvm.org/D23663

llvm-svn: 279258
2016-08-19 15:23:39 +00:00
George Rimar db24d9c3e8 [ELF] - Linkerscript: implemented SUBALIGN() command.
You can force input section alignment within an output section by using SUBALIGN. The
value specified overrides any alignment given by input sections, whether larger or smaller.

SUBALIGN is used in many projects in the wild.

Differential revision: https://reviews.llvm.org/D23063

llvm-svn: 279256
2016-08-19 15:18:23 +00:00
George Rimar a2f96619cb [ELF] - Removed excessive llvm-readobj call from linkerscript-ouputformat.s. NFC.
llvm-svn: 279236
2016-08-19 12:57:45 +00:00
George Rimar 11f83b7941 [ELF] - Do not change binding of symbols when creating relocatable output.
Spec says "A hidden symbol contained in a relocatable object must be either
removed or converted to STB_LOCAL binding by the link-editor when the
relocatable object is included in an executable file or shared object".
But we previously converted symbols to STB_LOCAL even when -r was specified.

Broken binary was produced, this is PR28967, patch fixes the issue.

Differential revision: https://reviews.llvm.org/D23514

llvm-svn: 279220
2016-08-19 08:31:02 +00:00
Petr Hosek 4071b1bac3 [ELF] Improve error reporting for relocations
We should always include symbol name when reporting relocations
error to simplify debugging of these issues. Without symbol names
users have to manually investigate which of the libraries contain
invalid relocations which can be cumbersome when linking multiple
libraries.

Differential Revision: https://reviews.llvm.org/D23690

llvm-svn: 279162
2016-08-18 21:55:23 +00:00
Simon Atanasyan 978f91ca43 [ELF][MIPS] Support R_MIPS_GOT_HI16 / R_MIPS_GOT_LO16 relocations calculation
llvm-svn: 279119
2016-08-18 19:08:41 +00:00
Simon Atanasyan e933a8e212 [ELF][MIPS] Support R_MIPS_CALL_HI16 / R_MIPS_CALL_LO16 relocations calculation
llvm-svn: 279118
2016-08-18 19:08:36 +00:00
George Rimar dbb76dbde3 [ELF] - Linkerscript: removed duplicate forward declarations, regrouped. NFC.
llvm-svn: 279060
2016-08-18 13:00:49 +00:00
George Rimar 43ec1c532e [ELF] - Inline defineSymbolVersion(). NFC.
llvm-svn: 279059
2016-08-18 12:53:57 +00:00
Ed Maste dec9808353 ELF: ignore -EB and -EL options
Differential Revision:	https://reviews.llvm.org/D23124

llvm-svn: 279058
2016-08-18 12:44:45 +00:00
Eugene Leviant 3f675e38bd [ELF] Don't add input sections twice when linker script is used
llvm-svn: 279036
2016-08-18 07:27:37 +00:00
Petr Hosek 0df80bef96 [ELF] Linkerscript: support assignment outside SECTIONS
We only support assignments inside SECTIONS, but this does not match
the behavior of GNU linker which also allows them outside SECTIONS.
The only restriction on assignments outside SECTIONS is that they
cannot reference . (they have to be absolute expressions).

Differential Revision: https://reviews.llvm.org/D23598

llvm-svn: 279033
2016-08-18 04:34:27 +00:00
Petr Hosek 1fb2ecc903 [ELF] Allow specifying the stack size
This option can be used to specify the stack size of the
PT_GNU_STACK segment.

Differential Revision: https://reviews.llvm.org/D23538

llvm-svn: 279013
2016-08-17 23:59:58 +00:00