mirror of
https://github.com/c64scene-ar/llvm-6502.git
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972fb8ca77
Eliminate the copies LLVM's System mmap and cache invalidation code. These were slowly drifting away from the original version, and moreover the copied code was a dead end in terms of portability. We now statically link to Support but in practice with stripping this adds next to no weight to the resultant binary. Also avoid installing lli-child-target to the user's $PATH. It's not meant to be run directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199881 91177308-0d34-0410-b5e6-96231b3b80d8
128 lines
4.4 KiB
C++
128 lines
4.4 KiB
C++
//===- RemoteTarget.h - LLVM Remote process JIT execution ----------------===//
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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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// Definition of the RemoteTarget class which executes JITed code in a
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// separate address range from where it was built.
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//
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//===----------------------------------------------------------------------===//
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#ifndef REMOTEPROCESS_H
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#define REMOTEPROCESS_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/Memory.h"
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#include <stdlib.h>
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#include <string>
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namespace llvm {
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class RemoteTarget {
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bool IsRunning;
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typedef SmallVector<sys::MemoryBlock, 16> AllocMapType;
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AllocMapType Allocations;
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protected:
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std::string ErrorMsg;
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public:
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StringRef getErrorMsg() const { return ErrorMsg; }
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/// Allocate space in the remote target address space.
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///
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/// @param Size Amount of space, in bytes, to allocate.
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/// @param Alignment Required minimum alignment for allocated space.
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/// @param[out] Address Remote address of the allocated memory.
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///
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/// @returns True on success. On failure, ErrorMsg is updated with
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/// descriptive text of the encountered error.
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virtual bool allocateSpace(size_t Size,
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unsigned Alignment,
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uint64_t &Address);
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bool isAllocatedMemory(uint64_t Address, uint32_t Size) {
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uint64_t AddressEnd = Address + Size;
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for (AllocMapType::const_iterator I = Allocations.begin(),
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E = Allocations.end();
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I != E; ++I) {
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if (Address >= (uint64_t)I->base() &&
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AddressEnd <= (uint64_t)I->base() + I->size())
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return true;
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}
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return false;
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}
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/// Load data into the target address space.
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///
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/// @param Address Destination address in the target process.
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/// @param Data Source address in the host process.
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/// @param Size Number of bytes to copy.
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///
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/// @returns True on success. On failure, ErrorMsg is updated with
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/// descriptive text of the encountered error.
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virtual bool loadData(uint64_t Address,
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const void *Data,
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size_t Size);
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/// Load code into the target address space and prepare it for execution.
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///
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/// @param Address Destination address in the target process.
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/// @param Data Source address in the host process.
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/// @param Size Number of bytes to copy.
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///
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/// @returns True on success. On failure, ErrorMsg is updated with
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/// descriptive text of the encountered error.
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virtual bool loadCode(uint64_t Address,
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const void *Data,
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size_t Size);
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/// Execute code in the target process. The called function is required
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/// to be of signature int "(*)(void)".
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///
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/// @param Address Address of the loaded function in the target
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/// process.
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/// @param[out] RetVal The integer return value of the called function.
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///
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/// @returns True on success. On failure, ErrorMsg is updated with
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/// descriptive text of the encountered error.
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virtual bool executeCode(uint64_t Address,
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int &RetVal);
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/// Minimum alignment for memory permissions. Used to seperate code and
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/// data regions to make sure data doesn't get marked as code or vice
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/// versa.
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///
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/// @returns Page alignment return value. Default of 4k.
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virtual unsigned getPageAlignment() { return 4096; }
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/// Start the remote process.
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virtual bool create();
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/// Terminate the remote process.
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virtual void stop();
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RemoteTarget() : IsRunning(false), ErrorMsg("") {}
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virtual ~RemoteTarget() { if (IsRunning) stop(); }
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// Create an instance of the system-specific remote target class.
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static RemoteTarget *createRemoteTarget();
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static RemoteTarget *createExternalRemoteTarget(std::string &ChildName);
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static bool hostSupportsExternalRemoteTarget();
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private:
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// Main processing function for the remote target process. Command messages
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// are received on file descriptor CmdFD and responses come back on OutFD.
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static void doRemoteTargeting(int CmdFD, int OutFD);
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};
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} // end namespace llvm
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#endif
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