Bill Schmidt 57ac1f458a This patch implements the general dynamic TLS model for 64-bit PowerPC. ... Given a thread-local symbol x with global-dynamic access, the generated code to obtain x's address is: Instruction Relocation Symbol addis ra,r2,x@got@tlsgd@ha R_PPC64_GOT_TLSGD16_HA x addi r3,ra,x@got@tlsgd@l R_PPC64_GOT_TLSGD16_L x bl __tls_get_addr(x@tlsgd) R_PPC64_TLSGD x R_PPC64_REL24 __tls_get_addr nop <use address in r3> The implementation borrows from the medium code model work for introducing special forms of ADDIS and ADDI into the DAG representation. This is made slightly more complicated by having to introduce a call to the external function __tls_get_addr. Using the full call machinery is overkill and, more importantly, makes it difficult to add a special relocation. So I've introduced another opcode GET_TLS_ADDR to represent the function call, and surrounded it with register copies to set up the parameter and return value. Most of the code is pretty straightforward. I ran into one peculiarity when I introduced a new PPC opcode BL8_NOP_ELF_TLSGD, which is just like BL8_NOP_ELF except that it takes another parameter to represent the symbol ("x" above) that requires a relocation on the call. Something in the TblGen machinery causes BL8_NOP_ELF and BL8_NOP_ELF_TLSGD to be treated identically during the emit phase, so this second operand was never visited to generate relocations. This is the reason for the slightly messy workaround in PPCMCCodeEmitter.cpp:getDirectBrEncoding(). Two new tests are included to demonstrate correct external assembly and correct generation of relocations using the integrated assembler. Comments welcome! Thanks, Bill git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169910 91177308-0d34-0410-b5e6-96231b3b80d8		2012-12-11 20:30:11 +00:00
..
MCDisassembler	Add C API for specifying CPU to the disassembler.	2012-12-07 23:53:27 +00:00
MCParser	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
CMakeLists.txt	Give MCRegisterInfo an implementation file.	2012-07-27 16:25:20 +00:00
ELFObjectWriter.cpp	Make the contents of encoded sections SmallVector<char, N> instead of	2012-12-07 22:06:56 +00:00
LLVMBuild.txt	LLVMBuild: Introduce a common section which currently has a list of the	2011-12-12 22:45:54 +00:00
MachObjectWriter.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
Makefile
MCAsmBackend.cpp	MachO: direct-to-object attribute for data-in-code markers.	2012-10-01 22:20:54 +00:00
MCAsmInfo.cpp	Fix alignment of .comm and .lcomm on mingw32.	2012-09-07 21:08:01 +00:00
MCAsmInfoCOFF.cpp	Fix alignment of .comm and .lcomm on mingw32.	2012-09-07 21:08:01 +00:00
MCAsmInfoDarwin.cpp	Fix alignment of .comm and .lcomm on mingw32.	2012-09-07 21:08:01 +00:00
MCAsmStreamer.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
MCAssembler.cpp	Remove the RelaxAll overrule in MCAssembler::fixupNeedsRelaxation,	2012-12-11 17:16:00 +00:00
MCAtom.cpp
MCCodeEmitter.cpp
MCCodeGenInfo.cpp
MCContext.cpp	fixed valgrind issues of prior commit, this change applies r169456 changes back to the tree with fixes. on darwin no valgrind issues exist in the tests that used to fail.	2012-12-06 22:12:44 +00:00
MCDisassembler.cpp
MCDwarf.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
MCELF.cpp	Added Mapping Symbols for ARM ELF	2012-12-07 16:50:23 +00:00
MCELFObjectTargetWriter.cpp	Initial TOC support for PowerPC64 object creation	2012-10-25 12:27:42 +00:00
MCELFStreamer.cpp	Refactor MCInstFragment and MCDataFragment to adhere to a common interface,	2012-12-07 19:13:57 +00:00
MCExpr.cpp	This patch implements the general dynamic TLS model for 64-bit PowerPC.	2012-12-11 20:30:11 +00:00
MCInst.cpp	Release build: guard dump functions with	2012-09-12 05:06:18 +00:00
MCInstPrinter.cpp	Try to unbreak the build on hosts that don't transitively pull in a definition for int64_t.	2012-12-05 18:31:11 +00:00
MCInstrAnalysis.cpp
MCLabel.cpp	Release build: guard dump functions with	2012-09-12 05:06:18 +00:00
MCMachObjectTargetWriter.cpp
MCMachOStreamer.cpp	Refactor MCInstFragment and MCDataFragment to adhere to a common interface,	2012-12-07 19:13:57 +00:00
MCModule.cpp
MCNullStreamer.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
MCObjectFileInfo.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
MCObjectStreamer.cpp	Refactor MCInstFragment and MCDataFragment to adhere to a common interface,	2012-12-07 19:13:57 +00:00
MCObjectWriter.cpp	Move [SU]LEB128 encoding to a utility header.	2012-08-08 23:56:06 +00:00
MCPureStreamer.cpp	Refactor MCInstFragment and MCDataFragment to adhere to a common interface,	2012-12-07 19:13:57 +00:00
MCRegisterInfo.cpp	Add MCRI::getNumSubRegIndices() and start checking SubRegIndex ranges.	2012-09-11 16:34:02 +00:00
MCSection.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
MCSectionCOFF.cpp	Tidy up. Trailing whitespace.	2012-05-11 01:41:30 +00:00
MCSectionELF.cpp	Tidy up. Trailing whitespace.	2012-05-11 01:41:30 +00:00
MCSectionMachO.cpp
MCStreamer.cpp	Defer call to InitSections until after MCContext has been initialized. If	2012-12-10 22:49:11 +00:00
MCSubtargetInfo.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
MCSymbol.cpp	Fix Doxygen issues:	2012-09-14 14:57:36 +00:00
MCTargetAsmLexer.cpp
MCValue.cpp	Release build: guard dump functions with	2012-09-12 05:06:18 +00:00
MCWin64EH.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
SubtargetFeature.cpp	Symbol hygiene: Make sure declarations and definitions match, make helper functions static.	2012-10-20 12:53:26 +00:00
WinCOFFObjectWriter.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
WinCOFFStreamer.cpp	Refactor MCInstFragment and MCDataFragment to adhere to a common interface,	2012-12-07 19:13:57 +00:00