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 208 of file OrcABISupport.h.

Member Typedef Documentation

IndirectStubsInfo

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

Definition at line 214 of file OrcABISupport.h.

JITReentryFn

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

Definition at line 217 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 475 of file OrcABISupport.cpp.

References llvm::sys::Memory::allocateMappedMemory(), llvm::errorCodeToError(), llvm::sys::Process::getPageSizeEstimate(), 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 415 of file OrcABISupport.cpp.

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 462 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 210 of file OrcABISupport.h.

ResolverCodeSize

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

static

Definition at line 212 of file OrcABISupport.h.

TrampolineSize

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

static

Definition at line 211 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