The missing piece is relocation composition for %hi(%neg(%gp_rel(x))) and
similar.
Patch by: Daniel Sanders
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284724 91177308-0d34-0410-b5e6-96231b3b80d8
All of these existed because MSVC 2013 was unable to synthesize default
move ctors. We recently dropped support for it so all that error-prone
boilerplate can go.
No functionality change intended.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284721 91177308-0d34-0410-b5e6-96231b3b80d8
Now that we have dropped MSVC 2013, all supported compilers support
noexcept and we can drop this portability macro.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284672 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This adds the necessary logic to support relocations to thumb functions in the COFF dynamic linker.
The jumps to function addresses are mostly blx, which requires the ISA selection bit when jumping to a thumb function.
Note: I'm determining if the relocation requires the ISA bit when creating the relocation entries and not when resolving the relocation. I have to do that because I need the ObjectFile and the actual Symbol, which are available only when creating the entries. It would require a gross refactor if I do it otherwise, but I'm okay with doing it if you think it's better.
Reviewers: peter.smith, compnerd
Subscribers: rengolin, sas
Differential Revision: https://reviews.llvm.org/D25151
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284410 91177308-0d34-0410-b5e6-96231b3b80d8
This patch moves symbol mangling from findSymbol to getSymbolAddress. The
findSymbol, findExistingSymbol and findModuleForSymbol methods now always take
a mangled name, allowing the 'demangle-and-retry' cruft to be removed from
findSymbol. See http://llvm.org/PR28699 for details.
Patch by James Holderness. Thanks very much James!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@281238 91177308-0d34-0410-b5e6-96231b3b80d8
ObjectCache is an ExecutionEngine utility, so its anchor belongs there. The
practical impact of this change is that ORC users no longer need to link MCJIT
to use ObjectCaches.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280616 91177308-0d34-0410-b5e6-96231b3b80d8
According to the arm arm specifications, 4 bytes are needed for a shift instead
of 8, this was causing the movt instruction to write to a different register
sometimes.
Patch by Walter Erquinigo!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280005 91177308-0d34-0410-b5e6-96231b3b80d8
Patch by William Dillon. Thanks William!
This patch adds support for the R_ARM_REL32 and R_ARM_GOT_PREL ELF ARM
relocations to RuntimeDyld, which should allow JITing of code that
produces these relocations.
No test case: Unfortunately RuntimeDyldELF's GOT building mechanism (which
uses a separate section for GOT entries) isn't compatible with
RuntimeDyldChecker. The correct fix for this is to fix RuntimeDyldELF's GOT
support (it's fundamentally broken at the moment: separate sections aren't
guaranteed to be in range of a GOT entry load), but that's a non-trivial job.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279182 91177308-0d34-0410-b5e6-96231b3b80d8
This is a mechanical change of comments in switches like fallthrough,
fall-through, or fall-thru to use the LLVM_FALLTHROUGH macro instead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278902 91177308-0d34-0410-b5e6-96231b3b80d8
If the result of the find is only used to compare against end(), just
use is_contained instead.
No functionality change is intended.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278469 91177308-0d34-0410-b5e6-96231b3b80d8
ExecutionEngine::runFunction is supposed to allow execution of arbitrary
function types, but MCJIT can only reasonably support a limited subset of
main-linke function types. This patch documents this limitation, and fixes
MCJIT::runFunction to abort with a meaningful error at runtime if called with
an unsupported function type.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278348 91177308-0d34-0410-b5e6-96231b3b80d8
This patch causes RuntimeDyld to check for existing definitions when it
encounters weak symbols. If a definition already exists then the new weak
definition is discarded. All symbol lookups within a "logical dylib" should now
agree on the address of any given weak symbol. This allows the JIT to better
match the behavior of the static linker for C++ code.
This support is only partial, as it does not allow strong definitions that
occur after the first weak definition (in JIT symbol lookup order) to override
the previous weak definitions. Support for this will be added in a future
patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278065 91177308-0d34-0410-b5e6-96231b3b80d8
JITSymbol really belongs in RuntimeDyld. This should fix the llvm-rtdyld link
failures caused by r277943.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277945 91177308-0d34-0410-b5e6-96231b3b80d8
It breaks ExecutionEngine/OrcLazy/weak-function.ll on most bots.
Script:
--
...
--
Exit Code: 1
Command Output (stderr):
--
Could not find main function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277907 91177308-0d34-0410-b5e6-96231b3b80d8
This adds partial support for weak functions to the CompileOnDemandLayer by
modifying the addLogicalModule method to check for existing stub definitions
before building a new stub for a weak function. This scheme is sufficient to
support ODR definitions, but fails for general weak definitions if strong
definition is encountered after the first weak definition. (A more extensive
refactor will be required to fully support weak symbols).
This patch does *not* add weak symbol support to RuntimeDyld: I hope to add
that in the near future.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277896 91177308-0d34-0410-b5e6-96231b3b80d8
Common symbol support in ORC was broken in r270716 when the symbol resolution
rules in RuntimeDyld were changed. With the switch to lazily materialized
symbols in r277386, common symbols can be supported by having
RuntimeDyld::emitCommonSymbols search for (but not materialize!) definitions
elsewhere in the logical dylib.
This patch adds the 'Common' flag to JITSymbolFlags, and the necessary check
to RuntimeDyld::emitCommonSymbols.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277397 91177308-0d34-0410-b5e6-96231b3b80d8
This patch replaces RuntimeDyld::SymbolInfo with JITSymbol: A symbol class
that is capable of lazy materialization (i.e. the symbol definition needn't be
emitted until the address is requested). This can be used to support common
and weak symbols in the JIT (though this is not implemented in this patch).
For consistency, RuntimeDyld::SymbolResolver is renamed to JITSymbolResolver.
For space efficiency a new class, JITEvaluatedSymbol, is introduced that
behaves like the old RuntimeDyld::SymbolInfo - i.e. it is just a pair of an
address and symbol flags. Instances of JITEvaluatedSymbol can be used in
symbol-tables to avoid paying the space cost of the materializer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277386 91177308-0d34-0410-b5e6-96231b3b80d8
As suggested by Rafael in review of D22079 - this was accidentally left out of
the final commit (r275316).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275469 91177308-0d34-0410-b5e6-96231b3b80d8
If there was a tail call, we would incorrectly handle the relocation. It would
end up indexing into the array with an incorrect section id. The symbol was
external to the module, so the Section ID was UNDEFINED (-1). We would then
index the SmallVector with this ID, triggering an assertion. Use the Value
rather than the section load address in this case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275442 91177308-0d34-0410-b5e6-96231b3b80d8
See http://reviews.llvm.org/D22079
Changes the Archive::child_begin and Archive::children to require a reference
to an Error. If iterator increment fails (because the archive header is
damaged) the iterator will be set to 'end()', and the error stored in the
given Error&. The Error value should be checked by the user immediately after
the loop. E.g.:
Error Err;
for (auto &C : A->children(Err)) {
// Do something with archive child C.
}
// Check the error immediately after the loop.
if (Err)
return Err;
Failure to check the Error will result in an abort() when the Error goes out of
scope (as guaranteed by the Error class).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275316 91177308-0d34-0410-b5e6-96231b3b80d8
a good error message to be produced.
This is nearly the last libObject interface that used ErrorOr and the last one
that appears in llvm/include/llvm/Object/MachO.h . For Mach-O objects this is
just a clean up because it’s version of getSymbolAddress() can’t return an
error.
I will leave it to the experts on COFF and ELF to actually add meaning full
error messages in their tests if they wish. And also leave it to these experts
to change the last two ErrorOr interfaces in llvm/include/llvm/Object/ObjectFile.h
for createCOFFObjectFile() and createELFObjectFile() if they wish.
Since there are no test cases for COFF and ELF error cases with respect to
getSymbolAddress() in the test suite this is no functional change (NFC).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273701 91177308-0d34-0410-b5e6-96231b3b80d8
The Value is only used in debug or asserts builds. Just cast to void to silence
an unused variable warning.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273684 91177308-0d34-0410-b5e6-96231b3b80d8
This adds rudimentary support for COFF ARM to the dynamic loader for the
exeuction engine. This can be used by lldb to JIT code into a COFF ARM
environment. This lays the foundation for the loader, though a few of the
relocation types are yet unhandled.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273682 91177308-0d34-0410-b5e6-96231b3b80d8
This is a convenience iterator that allows clients to enumerate the
GlobalObjects within a Module.
Also start using it in a few places where it is obviously the right thing
to use.
Differential Revision: http://reviews.llvm.org/D21580
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This fixes IMAGE_REL_I386_DIR32, IMAGE_REL_I386_DIR32NB,
IMAGE_REL_I386_SECREL, and IMAGE_REL_I386_REL32 relocations.
Based on patch by Jon Turney <jon.turney@dronecode.org.uk>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272911 91177308-0d34-0410-b5e6-96231b3b80d8
If a local_unnamed_addr attribute is attached to a global, the address
is known to be insignificant within the module. It is distinct from the
existing unnamed_addr attribute in that it only describes a local property
of the module rather than a global property of the symbol.
This attribute is intended to be used by the code generator and LTO to allow
the linker to decide whether the global needs to be in the symbol table. It is
possible to exclude a global from the symbol table if three things are true:
- This attribute is present on every instance of the global (which means that
the normal rule that the global must have a unique address can be broken without
being observable by the program by performing comparisons against the global's
address)
- The global has linkonce_odr linkage (which means that each linkage unit must have
its own copy of the global if it requires one, and the copy in each linkage unit
must be the same)
- It is a constant or a function (which means that the program cannot observe that
the unique-address rule has been broken by writing to the global)
Although this attribute could in principle be computed from the module
contents, LTO clients (i.e. linkers) will normally need to be able to compute
this property as part of symbol resolution, and it would be inefficient to
materialize every module just to compute it.
See:
http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20160509/356401.htmlhttp://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20160516/356738.html
for earlier discussion.
Part of the fix for PR27553.
Differential Revision: http://reviews.llvm.org/D20348
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272709 91177308-0d34-0410-b5e6-96231b3b80d8
