Commit Graph

6127 Commits

Author SHA1 Message Date
Lang Hames a5c7adcb38 [lld][MachO] Remove SimpleFile::definedAtoms().
This method just duplicates the functionality of SimpleFile::defined().

llvm-svn: 274048
2016-06-28 18:42:33 +00:00
George Rimar d84f21b288 [ELF] - Remove Config->ZDefs flag.
-z defs is the same as --no-undefined (http://linux.die.net/man/1/ld).
It looks to be a error to handle it separatelly.

Differential revision: http://reviews.llvm.org/D21788

llvm-svn: 274003
2016-06-28 12:04:19 +00:00
George Rimar 4365158689 [ELF] - Implemented support of default/non-default symbols versions
t is possible to create new version of symbol instead of depricated one
using combination of version script and asm commands. For example:

__asm__(".symver b_1,b@LIBSAMPLE_1.0");
int b_1() { return 10; }
__asm__(".symver b_2,b@@LIBSAMPLE_2.0");
int b_2() { return 20; }

This code makes b_2() to be default implementation for b().
b_1() is used for compatibility with binaries compiled against
library of older version LIBSAMPLE_1.0.

This patch implements support for above functionality in lld.

Differential revision: http://reviews.llvm.org/D21681

llvm-svn: 274002
2016-06-28 08:21:10 +00:00
George Rimar 36b2c0a683 [ELF] - Implemented --no-undefined-version flag
Option checks for cases where a version script explicitly lists
a symbol, but the symbol is not defined and errors out such
cases if any.

Differential revision: http://reviews.llvm.org/D21745

llvm-svn: 273998
2016-06-28 08:07:26 +00:00
Davide Italiano 4fdc648592 [ELF] Warn for duplicate symbols in version scripts instead of erroring out.
Emitting an error in this case breaks real-world application (e.g. libreoffice).
See http://reviews.llvm.org/D21555 for context.

Differential Revision:  http://reviews.llvm.org/D21781

llvm-svn: 273989
2016-06-28 03:40:49 +00:00
Chris Bieneman 677c6e4173 [yaml2obj] Hopefully the last test case update from r273915
Should fix the last LLD bots.

llvm-svn: 273942
2016-06-27 21:06:40 +00:00
Chris Bieneman 4e5bdaaca4 [yaml2obj] One more missing test case update from r273915
Should fix the last LLD bots.

llvm-svn: 273939
2016-06-27 20:47:00 +00:00
Chris Bieneman ca5170e3e4 [yaml2obj] Updating LLD tests to account for LLVM r273915
This removed the -format flag from yaml2obj in favor of YAML tags.

llvm-svn: 273920
2016-06-27 20:17:08 +00:00
Lang Hames 1fc0023ebf [lld][MachO] Remove stray comment.
llvm-svn: 273917
2016-06-27 20:00:20 +00:00
Rui Ueyama 6a9940260c Define -v and -V as aliases to --version.
This is for GNU compatibility.

llvm-svn: 273847
2016-06-27 07:35:00 +00:00
Rui Ueyama 20d8d55b05 Fix library search order.
Previously, we searched for a .so file from all library paths and
then searched for a .a file. That logic is wrong. What we need to
do is to look for a .so and a .a for each library path.

llvm-svn: 273846
2016-06-27 07:26:28 +00:00
Rui Ueyama 596eba86bc Ignore --sort-common.
Because we always sort common symbols, we can ignore the option.

llvm-svn: 273842
2016-06-27 02:43:27 +00:00
Davide Italiano 47ae3c3e22 [LinkerScript] Spell 'character' correctly. NFC.
llvm-svn: 273817
2016-06-26 19:02:43 +00:00
Rui Ueyama b1421a1cec Do not lookup the same option twice. NFC.
llvm-svn: 273771
2016-06-25 04:37:56 +00:00
Lang Hames 3b3b4d792f [lld][MachO] Add support for x86-64 negDelta64 references and fix negDelta32.
These references are used to implement MachO/x64-64 subtractor relocations
where the minuend is being fixed up, rather than the subtrahend. The 64-bit
version was not previously supported, the 32-bit version was partially
implemented but contained bugs not caught by existing test cases. This
patch fixes both functionality and test coverage.

llvm-svn: 273759
2016-06-25 00:29:54 +00:00
Davide Italiano e160f0d0d6 [ELF] Allow --reproduce to be specified as an environment variable.
PR: 28257
Differential Revision:   http://reviews.llvm.org/D21628

llvm-svn: 273698
2016-06-24 18:02:50 +00:00
George Rimar 6a7cfd039e [ELF] - Fix incorrect logic in VersionScriptParser::parseVersion()
Previously the next sample script would generate 2 entries in 
Config->SymbolVersions with the same version name.

VERSION {
 global: c;
};
That happened because parseVersionSymbols() was called twice.
At first for "global:" and since there is no local tag, it was called again.
Patch fixes the issue, testcase was updated to demonstrate.

Differential revision: http://reviews.llvm.org/D21640

llvm-svn: 273663
2016-06-24 11:23:55 +00:00
George Rimar 602fbee9fc [ELF] - Support of compressed input sections implemented.
Patch implements support of zlib style compressed sections.
SHF_COMPRESSED flag is used to recognize that decompression is required.
After that decompression is performed and flag is removed from output.

Differential revision: http://reviews.llvm.org/D20272

llvm-svn: 273661
2016-06-24 11:18:44 +00:00
Simon Atanasyan 002e244717 [ELF][MIPS] Support MIPS TLS relocations
The patch adds one more partition to the MIPS GOT. This time it is for
TLS related GOT entries. Such entries are located after 'local' and 'global'
ones. We cannot get a final offset for these entries at the time of
creation because we do not know size of 'local' and 'global' partitions.
So we have to adjust the offset later using `getMipsTlsOffset()` method.

All MIPS TLS relocations which need GOT entries operates MIPS style GOT
offset - 'offset from the GOT's beginning' - MipsGPOffset constant. That
is why I add new types of relocation expressions.

One more difference from othe ABIs is that the MIPS ABI does not support
any TLS relocation relaxations. I decided to make a separate function
`handleMipsTlsRelocation` and put MIPS TLS relocation handling code
there. It is similar to `handleTlsRelocation` routine and duplicates its
code. But it allows to make the code cleaner and prevent pollution of
the `handleTlsRelocation` by MIPS 'if' statements.

Differential Revision: http://reviews.llvm.org/D21606

llvm-svn: 273569
2016-06-23 15:26:31 +00:00
George Rimar 85dbed53a5 [ELF] - Reorder expressions in parseVersionSymbols()'s loop. NFC.
llvm-svn: 273539
2016-06-23 07:26:05 +00:00
George Rimar da5fa1ebba Revert r273427 "[ELF] - Simplify loop in parseVersionSymbols(). NFC."
llvm-svn: 273538
2016-06-23 07:23:07 +00:00
Rui Ueyama 3cda384e37 Attempt to fix Windows buildbots.
llvm-svn: 273537
2016-06-23 07:14:09 +00:00
Rui Ueyama d60dae8a6a Implement --trace-symbol=symbol option.
Patch by Shridhar Joshi.

This option provides names of all the link time modules which define and
reference symbols requested by user. This helps to speed up application
development by detecting references causing undefined symbols.
It also helps in detecting symbols being resolved to wrong (unintended)
definitions in case of applications containing multiple definitions for
same symbols with different types, bindings.

Implements PR28226.

llvm-svn: 273536
2016-06-23 07:00:17 +00:00
Rui Ueyama 809d8e2d41 Fix a bug that MIPS thunks can overwrite other section contents.
Peter Smith found while trying to support thunk creation for ARM that
LLD sometimes creates broken thunks for MIPS. The cause of the bug is
that we assign file offsets to input sections too early. We need to
create all sections and then assign section offsets because appending
thunks changes file offsets for all following sections.

This patch separates the pass to assign file offsets from thunk
creation pass. This effectively reverts r265673.

Differential Revision: http://reviews.llvm.org/D21598

llvm-svn: 273532
2016-06-23 04:33:42 +00:00
Davide Italiano 30afae1a75 [LTO] Update after API change in LLVM. NFC.
llvm-svn: 273462
2016-06-22 19:51:05 +00:00
Davide Italiano 595ee8cb9c [LTO] Include ASM undefs in llvm.compiler_used.
This fixes PR28218. Thanks to Rafael for spotting a failure in
the SHARED_LIBS build!

Differential Revision:  http://reviews.llvm.org/D21577

llvm-svn: 273451
2016-06-22 18:09:23 +00:00
George Rimar ff2d87c7ff [ELF] - Simplify loop in parseVersionSymbols(). NFC.
llvm-svn: 273427
2016-06-22 15:06:21 +00:00
George Rimar 4d8465cbe1 [ELF] - Show explicit error if extern keyword is used in version script.
Since we do not have plans to support it in closest future,
it is better than common script parsing error.

llvm-svn: 273426
2016-06-22 15:02:57 +00:00
George Rimar 0ab48b7334 [ELF] - Implemented version script hierarchies.
Patch implements hierarchies for version scripts. 
This allows to handle script files with dependencies, like next one has:

LIBSAMPLE_1.0{
  global:
  a;
};

LIBSAMPLE_2.0
{
  global:
  b;
}LIBSAMPLE_1.0;

Differential revision: http://reviews.llvm.org/D21556

llvm-svn: 273423
2016-06-22 14:40:45 +00:00
George Rimar d4245a1ffd Update testcases after r273417, which changed llvm-readobj output slightly.
llvm-svn: 273418
2016-06-22 13:45:08 +00:00
George Rimar 5b2503fb3e Added new line at the end of file. NFC.
llvm-svn: 273399
2016-06-22 11:41:37 +00:00
George Rimar b9f4492ef6 [ELF] - Do not crash on unclosed quote (") in scripts.
Found that during investigation of FreeBsd scripts.
Unclosed quote just crashed lld.

llvm-svn: 273398
2016-06-22 11:39:16 +00:00
George Rimar 50b80359c0 [ELF] - Do not allow to mix global symbols versions.
For next version script:
VER1{
  global:
  a;
};

VER2{
  global:
  a;
};
gold would produce warning like:
"warning: using 'VER1' as version for 'a' which is also named in version 'VER2' in script."

Documentation also says we do not want this duplications (https://people.freebsd.org/~deischen/symver/library_versioning.txt):
"Note that you do not want to duplicate symbols in the map file. The .symver directives are all that is required to add compatibility
symbols into old versions."

This patch restricts such mixing and makes lld to produce error in this case.

Differential revision: http://reviews.llvm.org/D21555

llvm-svn: 273396
2016-06-22 09:10:38 +00:00
Rui Ueyama d2ada2ea5d Do not scan relocations twice for MIPS.
Previously, relocations for MIPS were scanned twice; once in regular
scanRelocs() and the other is in scanRelocsForThunks. In the former
function, we computed types of relocations and skipped R_THUNK relocations.
In the latter function, we computed the same value again and skipped
all but R_THUNK relocations. It was wasteful. This patch fixes that.
Now R_THUNK relocations are handled in the regular manner.

llvm-svn: 273346
2016-06-22 00:57:09 +00:00
Rui Ueyama 39061a5220 Simplify writeThunk. NFC.
Previously, `Buf + 4` was written twice.

llvm-svn: 273337
2016-06-21 23:53:08 +00:00
Rafael Espindola 254b58dfe3 Revert "Revert "Add a test showing that lto produces relaxable relocations.""
This reverts commit r273247.

lld should always use the new relocations.

llvm-svn: 273266
2016-06-21 14:47:43 +00:00
Rui Ueyama d1188f757c Accept both single and double dashes for all options.
This is a follow-up patch to r273218. GNU ld accepts both "--" and "-"
for all multi-letter options except "-o". This patch makes lld compatible
with that behavior.

llvm-svn: 273256
2016-06-21 08:45:50 +00:00
Rui Ueyama 03a6cec51e Detect invalid use of R_X86_64_GOTTPOFF.
It is an ABI requirement that the relocation must be used
in MOVQ or LEAQ instructions. Previously, we ignored invalid
relocations.

llvm-svn: 273248
2016-06-21 06:03:28 +00:00
James Y Knight fde8f9bd82 Revert "Add a test showing that lto produces relaxable relocations."
This reverts commit r273074.

Reverting this too, after revert in llvm in r273245.

llvm-svn: 273247
2016-06-21 05:54:41 +00:00
Rui Ueyama b319ae2cf1 Refactor X86TargetInfo::relaxTlsIeToLe.
`Inst` and `Op` variables are removed since they are not always
point to an instruction nor an operand. For 5-byte MOV instruction,
Op points to an instruction, which is confusing.

llvm-svn: 273246
2016-06-21 05:44:14 +00:00
Rui Ueyama 73575c4d5e Fix typo in comment.
llvm-svn: 273243
2016-06-21 05:09:39 +00:00
Rui Ueyama 3f5dd1458e Unbreak buildbots.
llvm-svn: 273242
2016-06-21 05:01:31 +00:00
Rui Ueyama 55a9def2bf Refactor X86_64TargetInfo::relaxTlsIeToLe.
This patch is to rewrite the function with a table-lookup-ish approach
so that it can read as a series of "convert this pattern to this" pattern.

llvm-svn: 273238
2016-06-21 03:42:32 +00:00
Rui Ueyama 36a31171ff Allow both one and two dashes for all multi-letter options.
GNU ld's manual page says that all options whose names are
multiple letters, except those who start with "o", can start
either with one or two dashes.

llvm-svn: 273218
2016-06-20 23:10:40 +00:00
Tom Stellard 1cfb9efdf7 ELF/AMDGPU: Add support for R_AMDGPU_REL32 relocations
Reviewers: rafael, ruiu

Subscribers: kzhuravl, llvm-commits

Differential Revision: http://reviews.llvm.org/D21294

llvm-svn: 273192
2016-06-20 19:48:29 +00:00
Davide Italiano a074fe41bf [ELF] Accept --soname= (two dashes).
Update an existing test to exercise the new functionality, while
I'm here.

llvm-svn: 273175
2016-06-20 17:58:09 +00:00
Rafael Espindola ffe2e06f71 Don't go on an infinite loop on a missing ";".
Thanks to Will Dietz for reporting the issue.

llvm-svn: 273157
2016-06-20 14:02:22 +00:00
George Rimar 35728c3465 [ELF] - Lowercase the error messages text. NFC.
llvm-svn: 273156
2016-06-20 13:48:16 +00:00
George Rimar d5d544757e [ELF] - Removed excessive reference from pointer arguments. NFC.
llvm-svn: 273155
2016-06-20 13:30:37 +00:00
George Rimar 086fcae95e [ELF] - Forgot to address these two minors before commit r273152. NFC.
llvm-svn: 273154
2016-06-20 13:22:54 +00:00