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Sam Clegg 492f752969 [WebAssembly] Initial implementation of PIC code generation 
This change implements lowering of references global symbols in PIC
mode.

This change implements lowering of global references in PIC mode using a
new @GOT reference type. @GOT references can be used with function or
data symbol names combined with the get_global instruction. In this case
the linker will insert the wasm global that stores the address of the
symbol (either in memory for data symbols or in the wasm table for
function symbols).

For now I'm continuing to use the R_WASM_GLOBAL_INDEX_LEB relocation
type for this type of reference which means that this relocation type
can refer to either a global or a function or data symbol. We could
choose to introduce specific relocation types for GOT entries in the
future.  See the current dynamic linking proposal:

https://github.com/WebAssembly/tool-conventions/blob/master/DynamicLinking.md

Differential Revision: https://reviews.llvm.org/D54647

llvm-svn: 357022
 		2019-03-26 19:46:15 +00:00
..
Archive.cpp [libObject][NFC] Include filename in error message 2019-02-06 20:51:04 +00:00
ArchiveWriter.cpp [libObject][NFC] Use sys::path::convert_to_slash. 2019-02-19 18:14:44 +00:00
Binary.cpp [Object] Add basic minidump support 2019-03-21 09:18:59 +00:00
CMakeLists.txt [DWARF] Refactor RelocVisitor and fix computation of SHT_RELA-typed relocation entries 2019-03-22 02:43:11 +00:00
COFFImportFile.cpp [llvm-dlltool] Set a proper machine type for weak symbol object files 2019-03-26 09:02:44 +00:00
COFFModuleDefinition.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
COFFObjectFile.cpp [COFF] Add new relocation types. 2019-01-27 19:53:36 +00:00
Decompressor.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
ELF.cpp [ELF] Fix GCC8 warnings about "fall through", NFCI 2019-03-13 10:38:17 +00:00
ELFObjectFile.cpp Improve "llvm-nm -f sysv" output for Elf files 2019-03-08 22:00:50 +00:00
Error.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
IRObjectFile.cpp [Object] Fix reading objects created with -fembed-bitcode-marker 2019-03-21 21:01:31 +00:00
IRSymtab.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
LLVMBuild.txt Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
MachOObjectFile.cpp Fix Mach-O bind and rebase validation errors in libObject 2019-03-20 23:21:16 +00:00
MachOUniversal.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
Minidump.cpp [Object] Add basic minidump support 2019-03-21 09:18:59 +00:00
ModuleSymbolTable.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
Object.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
ObjectFile.cpp [Object] Add basic minidump support 2019-03-21 09:18:59 +00:00
RecordStreamer.cpp [AsmPrinter] Remove hidden flag -print-schedule. 2019-02-04 12:51:26 +00:00
RecordStreamer.h [AsmPrinter] Remove hidden flag -print-schedule. 2019-02-04 12:51:26 +00:00
RelocationResolver.cpp [DWARF] Refactor RelocVisitor and fix computation of SHT_RELA-typed relocation entries 2019-03-22 02:43:11 +00:00
SymbolSize.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
SymbolicFile.cpp [Object] Add basic minidump support 2019-03-21 09:18:59 +00:00
WasmObjectFile.cpp [WebAssembly] Initial implementation of PIC code generation 2019-03-26 19:46:15 +00:00
WindowsResource.cpp Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00