mirror of
https://github.com/c64scene-ar/llvm-6502.git
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d7802bf0dd
on 64-bit PowerPC ELF. The patch includes code to handle external assembly and MC output with the integrated assembler. It intentionally does not support the "old" JIT. For the initial-exec TLS model, the ABI requires the following to calculate the address of external thread-local variable x: Code sequence Relocation Symbol ld 9,x@got@tprel(2) R_PPC64_GOT_TPREL16_DS x add 9,9,x@tls R_PPC64_TLS x The register 9 is arbitrary here. The linker will replace x@got@tprel with the offset relative to the thread pointer to the generated GOT entry for symbol x. It will replace x@tls with the thread-pointer register (13). The two test cases verify correct assembly output and relocation output as just described. PowerPC-specific selection node variants are added for the two instructions above: LD_GOT_TPREL and ADD_TLS. These are inserted when an initial-exec global variable is encountered by PPCTargetLowering::LowerGlobalTLSAddress(), and later lowered to machine instructions LDgotTPREL and ADD8TLS. LDgotTPREL is a pseudo that uses the same LDrs support added for medium code model's LDtocL, with a different relocation type. The rest of the processing is straightforward. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169281 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
//===-- PPC.h - Top-level interface for PowerPC Target ----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the entry points for global functions defined in the LLVM
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// PowerPC back-end.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_POWERPC_H
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#define LLVM_TARGET_POWERPC_H
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#include "MCTargetDesc/PPCBaseInfo.h"
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#include "MCTargetDesc/PPCMCTargetDesc.h"
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#include <string>
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// GCC #defines PPC on Linux but we use it as our namespace name
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#undef PPC
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namespace llvm {
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class PPCTargetMachine;
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class FunctionPass;
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class JITCodeEmitter;
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class MachineInstr;
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class AsmPrinter;
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class MCInst;
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FunctionPass *createPPCCTRLoops();
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FunctionPass *createPPCBranchSelectionPass();
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FunctionPass *createPPCISelDag(PPCTargetMachine &TM);
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FunctionPass *createPPCJITCodeEmitterPass(PPCTargetMachine &TM,
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JITCodeEmitter &MCE);
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void LowerPPCMachineInstrToMCInst(const MachineInstr *MI, MCInst &OutMI,
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AsmPrinter &AP, bool isDarwin);
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namespace PPCII {
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/// Target Operand Flag enum.
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enum TOF {
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//===------------------------------------------------------------------===//
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// PPC Specific MachineOperand flags.
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MO_NO_FLAG,
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/// MO_DARWIN_STUB - On a symbol operand "FOO", this indicates that the
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/// reference is actually to the "FOO$stub" symbol. This is used for calls
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/// and jumps to external functions on Tiger and earlier.
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MO_DARWIN_STUB = 1,
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/// MO_PIC_FLAG - If this bit is set, the symbol reference is relative to
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/// the function's picbase, e.g. lo16(symbol-picbase).
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MO_PIC_FLAG = 4,
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/// MO_NLP_FLAG - If this bit is set, the symbol reference is actually to
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/// the non_lazy_ptr for the global, e.g. lo16(symbol$non_lazy_ptr-picbase).
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MO_NLP_FLAG = 8,
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/// MO_NLP_HIDDEN_FLAG - If this bit is set, the symbol reference is to a
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/// symbol with hidden visibility. This causes a different kind of
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/// non-lazy-pointer to be generated.
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MO_NLP_HIDDEN_FLAG = 16,
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/// The next are not flags but distinct values.
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MO_ACCESS_MASK = 0xe0,
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/// MO_LO16, MO_HA16 - lo16(symbol) and ha16(symbol)
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MO_LO16 = 1 << 5,
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MO_HA16 = 2 << 5,
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MO_TPREL16_HA = 3 << 5,
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MO_TPREL16_LO = 4 << 5,
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MO_GOT_TPREL16_DS = 5 << 5,
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MO_TLS = 6 << 5
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};
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} // end namespace PPCII
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} // end namespace llvm;
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#endif
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