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* [Mips] Implement R_MIPS_PC18_S3 relocation handlingSimon Atanasyan2015-03-191-0/+12
| | | | llvm-svn: 232756
* [Mips] Implement R_MIPS_PC19_S2 / R_MIPS_PC26_S2 relocations handlingSimon Atanasyan2015-03-191-0/+24
| | | | llvm-svn: 232755
* [ARM] Implement static (initial exec) TLS modelDenis Protivensky2015-03-195-5/+128
| | | | | | | | This includes handling of R_ARM_TLS_IE32 and R_ARM_TLS_LE32 relocs. Differential Revision: http://reviews.llvm.org/D8353 llvm-svn: 232708
* [Mips] Implement R_MIPS_PC21_S2 relocation handlingSimon Atanasyan2015-03-191-0/+12
| | | | llvm-svn: 232707
* [Mips] Recognize and check compatibility MIPS32R6 / MIPS64R6 ISA'sSimon Atanasyan2015-03-191-0/+4
| | | | llvm-svn: 232706
* [Mips] Replace "hand-made" function by the `llvm::SignExtend32()` routineSimon Atanasyan2015-03-191-12/+7
| | | | | | No functional changes. llvm-svn: 232705
* [ELF][ARM] Place gotSymbol in an anonymous namespaceShankar Easwaran2015-03-171-5/+8
| | | | | | Address comments from Espindola. llvm-svn: 232497
* [ARM] Read initial addend for REL32 and PREL31 relocsDenis Protivensky2015-03-171-0/+3
| | | | llvm-svn: 232474
* [ARM] Implement relocations: R_ARM_REL32, R_ARM_THM_JUMP11, R_ARM_PREL31Denis Protivensky2015-03-171-1/+81
| | | | | | | | Test case for every relocation is added. Differential Revision: http://reviews.llvm.org/D7565 llvm-svn: 232464
* [ELF] Use parallel_for_each for writing.Shankar Easwaran2015-03-172-6/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This changes improves performance of lld, when self-hosting lld, when compared with the bfd linker. BFD linker on average takes 8 seconds in elapsed time. lld takes 3 seconds elapased time average. Without this change, lld takes ~5 seconds average. The runtime comparisons were done on a release build and measured by running linking thrice. lld self-host without the change ---------------------------------- real 0m3.196s user 0m4.580s sys 0m0.832s lld self-host with lld ----------------------- user 0m3.024s user 0m3.252s sys 0m0.796s time taken to build lld with bfd -------------------------------- real 0m8.419s user 0m7.748s sys 0m0.632s llvm-svn: 232460
* Make it compile with MSVC 2013.Rui Ueyama2015-03-171-5/+6
| | | | | | | MSVC 2013 cannot compile this code because of C1001 "internal error". Stop using initializer list without type name. llvm-svn: 232448
* [ELF] Use pcrel format for eh_frame_ptr field encodingSimon Atanasyan2015-03-161-8/+12
| | | | | | | | | | | | | The `eh_frame_ptr` field in the `.eh_frame_hdr` section contains an address of the `.eh_frame` section. Using an absolute 32-bit format for encoding of this field does not work for 64-bit targets. It is better to use a relative format because it covers both 32-bit and 64-bit cases. Sure this work if a distance between `.eh_frame_hdr` and `.eh_frame` sections is less than 4 Gb but it is a rather correct assumption. http://reviews.llvm.org/D8352 llvm-svn: 232414
* [LinkerScript] Handle symbols defined in linker scriptsRafael Auler2015-03-167-27/+52
| | | | | | | | | | Puts symbols defined in linker script expressions in a runtime file that is added as input to the resolver, making the input object files see symbols defined in linker scripts. http://reviews.llvm.org/D8263 llvm-svn: 232409
* [LinkerScript] Implement semantics for simple sections mappingsRafael Auler2015-03-168-29/+203
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit implements the behaviour of the SECTIONS linker script directive, used to not only define a custom mapping between input and output sections, but also order input sections in the output file. To do this, we modify DefaultLayout with hooks at important places that allow us to re-order input sections according to a custom order. We also add a hook in SegmentChunk to allow us to calculate linker script expressions while assigning virtual addresses to the input sections that live in a segment. Not all SECTIONS constructs are currently supported, but only the ones that do not use special sort orders. It adds two LIT test as practical examples of which sections directives are currently supported. In terms of high-level changes, it creates a new class "script::Sema" that owns all linker script ASTs and the logic for linker script semantics as well. ELFLinkingContext owns a single copy of Sema, which will be used throughout the object file writing process (to layout sections as proposed by the linker script). Other high-level change is that the writer no longer uses a "const" copy of the linking context. This happens because linker script expressions must be calculated *while* calculating final virtual addresses, which is a very late step in object file writing. While calculating these expressions, we need to update the linker script symbol table (inside the semantics object), and, thus, we are "modifying our context" as we prepare to write the file. http://reviews.llvm.org/D8157 llvm-svn: 232402
* [Mips] clang-format the codeSimon Atanasyan2015-03-161-3/+2
| | | | | | No functional changes. llvm-svn: 232364
* [Mips] Do not check the relocation type twiceSimon Atanasyan2015-03-161-10/+6
| | | | | | No functional changes. llvm-svn: 232363
* [Mips] Add `const` qualifier to some member functionsSimon Atanasyan2015-03-161-23/+23
| | | | | | No functional changes. llvm-svn: 232362
* [Mips] Implement R_MIPS_TLS_xxx relocation handling in case of N64 ABISimon Atanasyan2015-03-165-13/+48
| | | | llvm-svn: 232361
* [Mips] Implement R_MIPS_GOT_DISP/PAGE/OFST relocations handlingSimon Atanasyan2015-03-164-27/+99
| | | | llvm-svn: 232360
* [Mips] Group some cases in the switch statementSimon Atanasyan2015-03-161-9/+6
| | | | | | No functional changes. llvm-svn: 232359
* [ELF][ARM] Make gotSymbol a member.Shankar Easwaran2015-03-161-9/+5
| | | | | | | | | | | The gotSymbol need not be a global static variable. Apart from this reason, This variable was creating an issue with self hosting lld, as there seems to be an issue running global initializers, when initializing the guard for this static variable. Program received signal SIGTRAP, Trace/breakpoint trap. llvm-svn: 232341
* Use setVisibility() rather than assigning the value directly.Davide Italiano2015-03-142-4/+5
| | | | | | | We don't want to risk to override wrong st_other bits, and when we need to zero, we can do that explictly. llvm-svn: 232282
* Revert "[ELF] Change few static functions."Shankar Easwaran2015-03-142-3/+3
| | | | | | | | This reverts commit r232253. Fix comments from dblaikie. Since these functions dont access member state, its ok to be static. llvm-svn: 232271
* [ELF] Ability to resolve undefined symbols lazilyDenis Protivensky2015-03-143-4/+116
| | | | | | | | | Handle resolution of symbols coming from linked object files lazily. Add implementation of handling _GLOBAL_OFFSET_TABLE_ and __exidx_start/_end symbols for ARM platform. Differential Revision: http://reviews.llvm.org/D8159 llvm-svn: 232261
* [ELF] Change few static functions.Shankar Easwaran2015-03-142-3/+3
| | | | | | Functions hasOutputSegment/maybeGetSOName doesnot need not be static. llvm-svn: 232253
* [ELF] Rename .got.dyn to .gotShankar Easwaran2015-03-142-2/+2
| | | | | | Gnu doesnot creates only a .got section. llvm-svn: 232252
* [ELF] Fix DenseMapInfo for StringRefShankar Easwaran2015-03-141-1/+1
| | | | llvm-svn: 232251
* [ELF] Remove ambiguityShankar Easwaran2015-03-142-2/+2
| | | | | | Fix ambiguous finalize function. llvm-svn: 232250
* [ELF] Simplify appending chunks to segments.Shankar Easwaran2015-03-141-17/+10
| | | | | | | | The Segment Chunk had two functions one to append a section and one to append a chunk. A section is a subclass of a chunk and clearly this can be merged into one single function. llvm-svn: 232249
* LinkerScript: Add -T <scriptfile> optionMeador Inge2015-03-131-3/+3
| | | | | | | | | | | GNU LD has an option named -T/--script which allows a user to specify a linker script to be used [1]. LLD already accepts linker scripts without this option, but the option is widely used. Therefore it is best to support it in LLD as well. [1] https://sourceware.org/binutils/docs/ld/Options.html#Options llvm-svn: 232183
* [Mips] Make `readAddend` a virtual member function to escape explicitSimon Atanasyan2015-03-123-28/+27
| | | | | | | | template class instantiation No functional changes. llvm-svn: 232081
* Fix configure & make build by adding support for the ExampleSubTarget.Iain Sandoe2015-03-122-0/+17
| | | | llvm-svn: 232030
* Fix a comparison function to actually be a SWO so that it conforms toChandler Carruth2015-03-111-15/+18
| | | | | | | | | | | | | | | | | | | | | | | | the spec required by std::sort and friends. Ordering things this way also dramatically simplifies the code as short-circuit ensures we can skip all of the negative tests. I've left one FIXME where we're establishing a fairly arbitrary ordering. Previously, the function compared all types as equal except for the ones it explicitly handled, but it didn't delegate correctly to the atomflags when doing so, and so it would fail to be a SWO. The two possible fixes are to stop comparing the atom flags entirely, or to establish some arbitrary ordering of the types. Since it was pure luck which ordering of unequal types we ended up with previously (the caller was std::sort, not std::stable_sort) I chose to make the ordering explicit and guaranteed. This seems like the best conservative approach as I suspect we would want to switch to stable_sort otherwise in order to have deterministic output. Differential Revision: http://reviews.llvm.org/D8266 llvm-svn: 231968
* Garbage collect an unused class in Atoms.hDavide Italiano2015-03-111-30/+0
| | | | | | | | | | This will be replaced by a more generic class to handle all the default symbols in an executable, e.g. __init_array. Differential Revision: http://reviews.llvm.org/D8234 Reviewed by: shankare llvm-svn: 231906
* Use template aliases.Rui Ueyama2015-03-106-50/+50
| | | | | | We dropped Visual Studio 2012 support, so we can use template aliases. llvm-svn: 231756
* Add SimpleAbsoluteAtom which is analogous to other Simple* atoms.Rui Ueyama2015-03-091-17/+2
| | | | llvm-svn: 231718
* [Mips] Remove unused includeSimon Atanasyan2015-03-091-1/+0
| | | | | | No functional changes. llvm-svn: 231646
* [Mips] Remove redundant namespace qualifiersSimon Atanasyan2015-03-092-41/+41
| | | | | | No functional changes. llvm-svn: 231645
* [Mips] Rename local variablesSimon Atanasyan2015-03-091-6/+5
| | | | | | No functional changes. llvm-svn: 231644
* [Mips] Implement R_MIPS_SUB relocation handlingSimon Atanasyan2015-03-091-0/+7
| | | | llvm-svn: 231643
* [Mips] Implement R_MIPS_64 relocation handlingSimon Atanasyan2015-03-092-32/+68
| | | | llvm-svn: 231642
* [Mips] Refactoring of relocation handling functionsSimon Atanasyan2015-03-094-239/+232
| | | | | | | | | | | 1. Move relocation addendum reading code to the MipsRelocationHandler class to reduce code duplication. 2. Factor out the relocations calculation code into the separate function to be ready to handle MIPS N64 ABI relocation chains. No functional changes. llvm-svn: 231641
* [Mips] Show error message and stop linking in case of cross mode jump errorsSimon Atanasyan2015-03-091-12/+16
| | | | llvm-svn: 231640
* [Mips] Fix incorrect handling of cross mode jumpsSimon Atanasyan2015-03-091-24/+38
| | | | | | | | We should not take in account a type of "source" symbol. Cross mode jump adjustment is requred when target symbol and relocation belong to different (regular/microMIPS) instruction sets. llvm-svn: 231639
* Remove sectionPosition attribute.Rui Ueyama2015-03-081-12/+0
| | | | | | | | This code is simply dead. No one is using it. http://reviews.llvm.org/D8125 llvm-svn: 231583
* Remove duplicate code. NFC.Rui Ueyama2015-03-074-16/+3
| | | | llvm-svn: 231570
* Remove else if a last block ends with return.Rui Ueyama2015-03-051-14/+10
| | | | llvm-svn: 231330
* Remove redundant virtual destructor.Rui Ueyama2015-03-051-3/+1
| | | | | | | DefinedAtom, which is the base class of ELFCommonAtom, has a virtual destructor, so this is redundant. llvm-svn: 231329
* Remove "inline" from inlined functions.Rui Ueyama2015-03-044-93/+66
| | | | llvm-svn: 231271
* [ELF] Implement R_X86_64_PC16 relocation.Davide Italiano2015-03-033-1/+11
| | | | | | | | | Yet another chapter in the story. We're getting there, finally. Note for the future: the tests for relocation have a lot of duplication and probably can be unified in a single file. Let's reevaluate this once the support will be complete (hopefully, soon). llvm-svn: 231057
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