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75 lines
1.6 KiB
C++
75 lines
1.6 KiB
C++
// SPDX-License-Identifier: MIT
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#pragma once
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#include <FEXCore/fextl/string.h>
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#include <FEXCore/fextl/vector.h>
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#include <cstdint>
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#include <unistd.h>
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namespace FEX {
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/**
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* @brief Code loader class so the CPU backend can load code in a generic fashion
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*
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* This class is expected to have multiple different style of code loaders
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*/
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class CodeLoader {
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public:
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struct AuxvResult {
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uint64_t address;
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uint64_t size;
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};
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virtual ~CodeLoader() = default;
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/**
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* @brief CPU Core uses this to choose what the stack size should be for this code
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*/
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virtual uint64_t StackSize() const = 0;
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/**
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* Returns the initial stack pointer
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*/
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virtual uint64_t GetStackPointer() const = 0;
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/**
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* @brief Function to return the guest RIP that the code should start out at
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*/
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virtual uint64_t DefaultRIP() const = 0;
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virtual fextl::vector<const char*> GetExecveArguments() const {
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return {};
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}
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virtual AuxvResult GetAuxv() const {
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return {};
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}
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virtual uint64_t GetBaseOffset() const {
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return 0;
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}
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const fextl::vector<fextl::string>& GetApplicationArguments() const {
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return ApplicationArgs;
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}
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/**
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* Writes out the arguments in the format of /proc/self/cmdline
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*/
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virtual void WriteCmdlineFD(int32_t fd) const {
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const auto& Args = GetApplicationArguments();
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const char NullChar {};
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// cmdline is an array of null terminated arguments
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for (const auto& Arg : Args) {
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write(fd, Arg.c_str(), Arg.size());
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write(fd, &NullChar, sizeof(uint8_t));
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}
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}
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protected:
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fextl::vector<fextl::string> ApplicationArgs;
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};
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} // namespace FEX
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