llvm::orc::OrcI386 Class Reference

I386 support. More...

#include "llvm/ExecutionEngine/Orc/OrcABISupport.h"

Collaboration diagram for llvm::orc::OrcI386:

Public Types
using	IndirectStubsInfo = GenericIndirectStubsInfo< 8 >
using	JITReentryFn = JITTargetAddress(*)(void *CallbackMgr, void *TrampolineId)

Static Public Member Functions
static void	writeResolverCode (uint8_t *ResolveMem, JITReentryFn Reentry, void *CallbackMgr)
	Write the resolver code into the given memory. More...
static void	writeTrampolines (uint8_t *TrampolineMem, void *ResolverAddr, unsigned NumTrampolines)
	Write the requsted number of trampolines into the given memory, which must be big enough to hold 1 pointer, plus NumTrampolines trampolines. More...
static Error	emitIndirectStubsBlock (IndirectStubsInfo &StubsInfo, unsigned MinStubs, void *InitialPtrVal)
	Emit at least MinStubs worth of indirect call stubs, rounded out to the nearest page size. More...

Static Public Attributes
static const unsigned	PointerSize = 4
static const unsigned	TrampolineSize = 8
static const unsigned	ResolverCodeSize = 0x4a

Detailed Description

I386 support.

I386 supports lazy JITing.

Definition at line 209 of file OrcABISupport.h.

Member Typedef Documentation

IndirectStubsInfo

using llvm::orc::OrcI386::IndirectStubsInfo = GenericIndirectStubsInfo<8>

Definition at line 215 of file OrcABISupport.h.

JITReentryFn

using llvm::orc::OrcI386::JITReentryFn = JITTargetAddress (*)(void *CallbackMgr, void *TrampolineId)

Definition at line 218 of file OrcABISupport.h.

Member Function Documentation

emitIndirectStubsBlock()

Error llvm::orc::OrcI386::emitIndirectStubsBlock ( IndirectStubsInfo &  StubsInfo, unsigned  MinStubs, void *  InitialPtrVal  )

static

Emit at least MinStubs worth of indirect call stubs, rounded out to the nearest page size.

E.g. Asking for 4 stubs on i386, where stubs are 8-bytes, with 4k pages will return a block of 512 stubs (4096 / 8 = 512). Asking for 513 will return a block of 1024 (2-pages worth).

Definition at line 476 of file OrcABISupport.cpp.

References llvm::sys::Memory::allocateMappedMemory(), llvm::errorCodeToError(), llvm::sys::Process::getPageSize(), I, llvm::sys::Memory::MF_EXEC, llvm::sys::Memory::MF_READ, llvm::sys::Memory::MF_WRITE, PageSize, llvm::sys::Memory::protectMappedMemory(), llvm::orc::GenericIndirectStubsInfo< StubSizeVal >::StubSize, and llvm::Error::success().

writeResolverCode()

void llvm::orc::OrcI386::writeResolverCode ( uint8_t *  ResolveMem, JITReentryFn  Reentry, void *  CallbackMgr  )

static

Write the resolver code into the given memory.

The user is be responsible for allocating the memory and setting permissions.

Definition at line 416 of file OrcABISupport.cpp.

References llvm::Intrinsic::memcpy.

writeTrampolines()

void llvm::orc::OrcI386::writeTrampolines ( uint8_t *  TrampolineMem, void *  ResolverAddr, unsigned  NumTrampolines  )

static

Write the requsted number of trampolines into the given memory, which must be big enough to hold 1 pointer, plus NumTrampolines trampolines.

Definition at line 463 of file OrcABISupport.cpp.

References I, and llvm::orc::OrcAArch64::TrampolineSize.

Member Data Documentation

PointerSize

const unsigned llvm::orc::OrcI386::PointerSize = 4

static

Definition at line 211 of file OrcABISupport.h.

ResolverCodeSize

const unsigned llvm::orc::OrcI386::ResolverCodeSize = 0x4a

static

Definition at line 213 of file OrcABISupport.h.

TrampolineSize

const unsigned llvm::orc::OrcI386::TrampolineSize = 8

static

Definition at line 212 of file OrcABISupport.h.

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The documentation for this class was generated from the following files:

• include/llvm/ExecutionEngine/Orc/OrcABISupport.h
• lib/ExecutionEngine/Orc/OrcABISupport.cpp