Merged PR 4081118: Add first draft of code invoke ioctl interface
Add first draft of code invoke ioctl interface
This commit is contained in:
Alan Jowett
Poorna Gaddehosur
Родитель
c3dd0ae742
Коммит
ec1eba0da5
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@ -1,6 +1,7 @@
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[submodule "external/ebpf-verifier"]
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path = external/ebpf-verifier
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url = https://github.com/vbpf/ebpf-verifier.git
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url = https://github.com/dthaler/ebpf-verifier.git
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branch = windows
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[submodule "external/ubpf"]
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path = external/ubpf
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@ -0,0 +1,22 @@
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/*
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* Copyright (C) 2020, Microsoft Corporation, All Rights Reserved
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* SPDX-License-Identifier: MIT
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*/
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#pragma once
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#include <functional>
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class UnwindHelper
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{
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public:
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UnwindHelper(std::function<void()> unwind) : unwind(unwind)
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{
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}
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~UnwindHelper()
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{
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unwind();
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}
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private:
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std::function<void()> unwind;
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};
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@ -0,0 +1,84 @@
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#include "ebpf_verifier.hpp"
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#include "windows/windows_platform.hpp"
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#include "Verifier.h"
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#include <sstream>
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#include <iostream>
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#include <filesystem>
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#include <sys/stat.h>
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int get_file_size(char* filename, size_t* byte_code_size)
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{
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int result = 0;
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*byte_code_size = NULL;
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struct stat st = { 0 };
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result = stat(filename, &st);
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if (!result)
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{
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std::cout << "file size " << st.st_size << std::endl;
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*byte_code_size = st.st_size;
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}
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return result;
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}
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static int analyze(raw_program& raw_prog, char ** error_message)
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{
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std::ostringstream oss;
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const ebpf_platform_t* platform = &g_ebpf_platform_windows;
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std::variant<InstructionSeq, std::string> prog_or_error = unmarshal(raw_prog, platform);
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if (!std::holds_alternative<InstructionSeq>(prog_or_error)) {
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return 1; // Error;
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}
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auto& prog = std::get<InstructionSeq>(prog_or_error);
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cfg_t cfg = prepare_cfg(prog, raw_prog.info, true);
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bool res = run_ebpf_analysis(oss, cfg, raw_prog.info, nullptr);
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if (!res) {
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size_t error_message_length = oss.str().size() + 1;
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*error_message = (char*)malloc(error_message_length);
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strcpy_s(*error_message, error_message_length, oss.str().c_str());
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return 1; // Error;
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}
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return 0; // Success.
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}
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int verify(const char* filename, const char* sectionname, uint8_t* byte_code, size_t* byte_code_size, char** error_message)
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{
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const ebpf_platform_t* platform = &g_ebpf_platform_windows;
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auto raw_progs = read_elf(filename, sectionname, create_map_crab, nullptr, platform);
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if (raw_progs.size() != 1) {
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return 1; // Error
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}
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raw_program raw_prog = raw_progs.back();
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// copy out the bytecode for the jitter
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if (byte_code) {
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size_t ebpf_bytes = raw_prog.prog.size() * sizeof(ebpf_inst);
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int i = 0;
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for (ebpf_inst inst : raw_prog.prog) {
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char* buf = (char*)&inst;
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for (int j = 0; j < sizeof(ebpf_inst) && i < ebpf_bytes; i++, j++) {
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byte_code[i] = buf[j];
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}
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}
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*byte_code_size = ebpf_bytes;
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}
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return analyze(raw_prog, error_message);
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}
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int verify_byte_code(const char* path, const char* section_name, const uint8_t* byte_code, size_t byte_code_size, char** error_message)
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{
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const ebpf_platform_t* platform = &g_ebpf_platform_windows;
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std::vector<ebpf_inst> instructions { (ebpf_inst*)byte_code, (ebpf_inst*)byte_code + byte_code_size / sizeof(ebpf_inst) };
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program_info info{ platform };
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info.type = platform->get_program_type(section_name, path);
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raw_program raw_prog{ path, section_name, instructions, info };
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return analyze(raw_prog, error_message);
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}
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@ -0,0 +1,11 @@
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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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int get_file_size(char* filename, size_t* byte_code_size);
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int verify(const char* filename, const char* sectionname, uint8_t* byte_code, size_t* byte_code_size, char** error_message);
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int verify_byte_code(const char* path, const char* section_name, const uint8_t* byte_code, size_t byte_code_size, char** error_message);
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#ifdef __cplusplus
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}
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#endif
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@ -0,0 +1,269 @@
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/*
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* Copyright (C) 2020, Microsoft Corporation, All Rights Reserved
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* SPDX-License-Identifier: MIT
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*/
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#include "pch.h"
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#define EBPF_API
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extern "C"
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{
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#include "api.h"
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#include "ubpf.h"
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}
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#include "protocol.h"
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#include "UnwindHelper.h"
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#include "Verifier.h"
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#define MAX_CODE_SIZE (32 * 1024) // 32 KB
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// Device type
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#define EBPF_IOCTL_TYPE FILE_DEVICE_NETWORK
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// Function codes from 0x800 to 0xFFF are for customer use.
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#define IOCTL_EBPFCTL_METHOD_BUFFERED \
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CTL_CODE( EBPF_IOCTL_TYPE, 0x900, METHOD_BUFFERED, FILE_ANY_ACCESS )
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static HANDLE device_handle = INVALID_HANDLE_VALUE;
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template <typename request_t, typename reply_t>
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static DWORD invoke_ioctl(HANDLE handle, request_t request, reply_t reply)
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{
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DWORD actual_reply_size;
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DWORD request_size;
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void* request_ptr;
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DWORD reply_size;
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void* reply_ptr;
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if constexpr (std::is_same<request_t, nullptr_t>::value) {
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request_size = 0;
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request_ptr = nullptr;
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}
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else if constexpr (std::is_same< request_t, std::vector<uint8_t>>::value)
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{
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request_size = static_cast<DWORD>(request.size());
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request_ptr = request.data();
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}
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else
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{
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request_size = sizeof(*request);
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request_ptr = request;
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}
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if constexpr (std::is_same<reply_t, nullptr_t>::value) {
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reply_size = 0;
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reply_ptr = nullptr;
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}
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else if constexpr (std::is_same< reply_t, std::vector<uint8_t>>::value)
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{
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reply_size = reply.size();
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reply_ptr = reply.data();
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}
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else
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{
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reply_size = sizeof(*reply);
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reply_ptr = reply;
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}
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auto result = DeviceIoControl(
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handle,
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(DWORD)IOCTL_EBPFCTL_METHOD_BUFFERED,
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request_ptr,
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request_size,
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reply_ptr,
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reply_size,
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&actual_reply_size,
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nullptr);
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if (actual_reply_size != reply_size)
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{
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return ERROR_INVALID_PARAMETER;
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}
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return result;
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}
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DWORD EbpfApiInit()
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{
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LPCWSTR ebpfDeviceName = L"\\\\.\\EbpfIoDevice";
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if (device_handle != INVALID_HANDLE_VALUE)
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{
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return ERROR_ALREADY_INITIALIZED;
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}
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device_handle = CreateFile(ebpfDeviceName,
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GENERIC_READ | GENERIC_WRITE,
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0,
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NULL,
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CREATE_ALWAYS,
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FILE_ATTRIBUTE_NORMAL,
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NULL);
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if (device_handle == INVALID_HANDLE_VALUE)
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{
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return GetLastError();
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}
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return 0;
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}
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void EbpfApiTerminate()
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{
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if (device_handle != INVALID_HANDLE_VALUE)
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{
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CloseHandle(device_handle);
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device_handle = INVALID_HANDLE_VALUE;
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}
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}
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uint64_t map_resolver(void* context, uint64_t fd)
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{
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EbpfOpResolveMapRequest request{
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sizeof(request),
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EbpfOperation::resolve_map,
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fd };
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EbpfOpResolveMapReply reply;
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invoke_ioctl(context, &request, &reply);
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if (reply.header.id != EbpfOperation::resolve_map)
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{
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return 0;
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}
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return reply.address[0];
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}
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uint64_t helper_resolver(void* context, uint32_t helper)
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{
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EbpfOpResolveHelperRequest request{
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sizeof(request),
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EbpfOperation::resolve_helper,
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helper };
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EbpfOpResolveMapReply reply;
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invoke_ioctl(context, &request, &reply);
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if (reply.header.id != EbpfOperation::resolve_helper)
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{
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return 0;
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}
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return reply.address[0];
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}
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DLL DWORD EbpfLoadProgram(const char* file_name, const char* section_name, HANDLE* handle, char** error_message)
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{
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std::vector<uint8_t> byte_code(MAX_CODE_SIZE);
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size_t byte_code_size = byte_code.size();
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std::vector<uint8_t> machine_code(MAX_CODE_SIZE);
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size_t machine_code_size = machine_code.size();
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std::vector<uint8_t> request_buffer;
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EbpfOpLoadReply reply;
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struct ubpf_vm* vm = nullptr;
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UnwindHelper unwind([&]
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{
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if (vm)
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{
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ubpf_destroy(vm);
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}
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});
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DWORD result;
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// Verify code.
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if (verify(file_name, section_name, byte_code.data(), &byte_code_size, error_message) != 0)
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{
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return ERROR_INVALID_PARAMETER;
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}
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// JIT code.
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vm = ubpf_create();
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if (vm == nullptr)
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{
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return ERROR_OUTOFMEMORY;
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}
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if (ubpf_load(vm, byte_code.data(), static_cast<uint32_t>(byte_code.size()), error_message) < 0)
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{
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return ERROR_INVALID_PARAMETER;
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}
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if (ubpf_register_map_resolver(vm, device_handle, map_resolver) < 0)
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{
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return ERROR_INVALID_PARAMETER;
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}
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if (ubpf_register_helper_resolver(vm, device_handle, helper_resolver) < 0)
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{
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return ERROR_INVALID_PARAMETER;
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}
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if (ubpf_translate(vm, machine_code.data(), &machine_code_size, error_message))
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{
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return ERROR_INVALID_PARAMETER;
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}
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machine_code.resize(machine_code_size);
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request_buffer.resize(machine_code.size() + sizeof(EbpfOpHeader));
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auto header = reinterpret_cast<EbpfOpHeader*>(request_buffer.data());
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header->id = EbpfOperation::load_code;
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header->length = static_cast<uint16_t>(request_buffer.size());
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std::copy(machine_code.begin(), machine_code.end(), request_buffer.begin() + sizeof(EbpfOpHeader));
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result = invoke_ioctl(device_handle, request_buffer, &reply);
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if (result != ERROR_SUCCESS)
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{
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return result;
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}
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if (reply.header.id != EbpfOperation::load_code)
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{
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return ERROR_INVALID_PARAMETER;
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}
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*handle = reinterpret_cast<HANDLE>(reply.handle);
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return result;
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}
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DLL void EbpfFreeErrorMessage(char* error_message)
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{
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return free(error_message);
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}
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DLL void EbpfUnloadProgram(HANDLE handle)
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{
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// TBD:
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// CloseHandle(handle);
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return;
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}
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DLL DWORD EbpfAttachProgram(HANDLE handle, DWORD hook_point)
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{
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EbpfOpAttachDetachRequest request{
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sizeof(request),
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EbpfOperation::attach,
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reinterpret_cast<uint64_t>(handle),
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hook_point };
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return invoke_ioctl(device_handle, &request, nullptr);
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}
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DLL DWORD EbpfDetachProgram(HANDLE handle, DWORD hook_point)
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{
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EbpfOpAttachDetachRequest request{
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sizeof(request),
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EbpfOperation::detach,
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reinterpret_cast<uint64_t>(handle),
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hook_point };
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return invoke_ioctl(device_handle, &request, nullptr);
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}
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@ -0,0 +1,25 @@
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/*
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* Copyright (C) 2020, Microsoft Corporation, All Rights Reserved
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* SPDX-License-Identifier: MIT
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*/
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#pragma once
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#if defined(EBPF_API)
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#define DLL __declspec(dllexport)
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#else
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#define DLL __declspec(dllimport)
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#endif
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#define EBPF_HOOK_POINT_XDP 1
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DLL DWORD EbpfApiInit();
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DLL void EbpfApiTerminate();
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DLL DWORD EbpfLoadProgram(const char* file, const char* section_name, HANDLE* handle, char ** error_message);
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DLL void EbpfFreeErrorMessage(char* error_message);
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DLL void EbpfUnloadProgram(HANDLE handle);
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DLL DWORD EbpfAttachProgram(HANDLE handle, DWORD hook_point);
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DLL DWORD EbpfDetachProgram(HANDLE handle, DWORD hook_point);
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@ -0,0 +1,24 @@
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/*
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* Copyright (C) 2020, Microsoft Corporation, All Rights Reserved
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* SPDX-License-Identifier: MIT
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*/
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// dllmain.cpp : Defines the entry point for the DLL application.
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#include "pch.h"
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BOOL APIENTRY DllMain( HMODULE hModule,
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DWORD ul_reason_for_call,
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LPVOID lpReserved
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)
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{
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switch (ul_reason_for_call)
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{
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case DLL_PROCESS_ATTACH:
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case DLL_THREAD_ATTACH:
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case DLL_THREAD_DETACH:
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case DLL_PROCESS_DETACH:
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break;
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}
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return TRUE;
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}
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@ -0,0 +1,75 @@
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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 16
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||||
VisualStudioVersion = 16.0.30907.101
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||||
MinimumVisualStudioVersion = 10.0.40219.1
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||||
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "ebpfapi", "ebpfapi.vcxproj", "{C8BF60C3-40A9-43AD-891A-8AA34F1C3A68}"
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EndProject
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "EbpfJitterDemoLib", "..\libs\EbpfJitterDemoLib\EbpfJitterDemoLib.vcxproj", "{245F0EC7-1EBC-4D68-8B1F-F758EA9196AE}"
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EndProject
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "ebpfverifier", "..\..\..\external\ebpf-verifier\build\ebpfverifier.vcxproj", "{939A079D-A1E8-35D9-950F-11B1894D342E}"
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||||
EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|x64 = Debug|x64
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||||
Debug|x86 = Debug|x86
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||||
MinSizeRel|x64 = MinSizeRel|x64
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||||
MinSizeRel|x86 = MinSizeRel|x86
|
||||
Release|x64 = Release|x64
|
||||
Release|x86 = Release|x86
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||||
RelWithDebInfo|x64 = RelWithDebInfo|x64
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||||
RelWithDebInfo|x86 = RelWithDebInfo|x86
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||||
EndGlobalSection
|
||||
GlobalSection(ProjectConfigurationPlatforms) = postSolution
|
||||
{C8BF60C3-40A9-43AD-891A-8AA34F1C3A68}.Debug|x64.ActiveCfg = Debug|x64
|
||||
{C8BF60C3-40A9-43AD-891A-8AA34F1C3A68}.Debug|x64.Build.0 = Debug|x64
|
||||
{C8BF60C3-40A9-43AD-891A-8AA34F1C3A68}.Debug|x86.ActiveCfg = Debug|Win32
|
||||
{C8BF60C3-40A9-43AD-891A-8AA34F1C3A68}.Debug|x86.Build.0 = Debug|Win32
|
||||
{C8BF60C3-40A9-43AD-891A-8AA34F1C3A68}.MinSizeRel|x64.ActiveCfg = Release|x64
|
||||
{C8BF60C3-40A9-43AD-891A-8AA34F1C3A68}.MinSizeRel|x64.Build.0 = Release|x64
|
||||
{C8BF60C3-40A9-43AD-891A-8AA34F1C3A68}.MinSizeRel|x86.ActiveCfg = Release|Win32
|
||||
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/*
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|
||||
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|
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*/
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|
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#pragma once
|
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|
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#include <cstdint>
|
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#include <exception>
|
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#include <vector>
|
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#include <string>
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#define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers
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// Windows Header Files
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<?xml version="1.0" encoding="utf-8"?>
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<package id="boost" version="1.72.0.0" targetFramework="native" />
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@ -0,0 +1,5 @@
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// pch.cpp: source file corresponding to the pre-compiled header
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#include "pch.h"
|
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|
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// When you are using pre-compiled headers, this source file is necessary for compilation to succeed.
|
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|
@ -0,0 +1,12 @@
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/*
|
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* Copyright (C) 2020, Microsoft Corporation, All Rights Reserved
|
||||
* SPDX-License-Identifier: MIT
|
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*/
|
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|
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#ifndef PCH_H
|
||||
#define PCH_H
|
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|
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// add headers that you want to pre-compile here
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@ -0,0 +1,65 @@
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/*
|
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* Copyright (C) 2020, Microsoft Corporation, All Rights Reserved
|
||||
* SPDX-License-Identifier: MIT
|
||||
*/
|
||||
#pragma once
|
||||
|
||||
enum class EbpfOperation {
|
||||
evidence,
|
||||
resolve_helper,
|
||||
resolve_map,
|
||||
load_code,
|
||||
attach,
|
||||
detach,
|
||||
};
|
||||
|
||||
struct EbpfOpHeader {
|
||||
uint16_t length;
|
||||
EbpfOperation id;
|
||||
};
|
||||
|
||||
struct EbpfOpEvidenceRequest {
|
||||
struct EbpfOpHeader header;
|
||||
uint8_t evidence[1];
|
||||
};
|
||||
|
||||
struct EbpfOpEvidenceReply {
|
||||
struct EbpfOpHeader header;
|
||||
uint32_t status;
|
||||
};
|
||||
|
||||
struct EbpfOpResolveHelperRequest {
|
||||
struct EbpfOpHeader header;
|
||||
uint32_t helper_id[1];
|
||||
};
|
||||
|
||||
struct EbpfOpResolveHelperReply {
|
||||
struct EbpfOpHeader header;
|
||||
uint64_t address[1];
|
||||
};
|
||||
|
||||
struct EbpfOpResolveMapRequest {
|
||||
struct EbpfOpHeader header;
|
||||
uint64_t map_id[1];
|
||||
};
|
||||
|
||||
struct EbpfOpResolveMapReply {
|
||||
struct EbpfOpHeader header;
|
||||
uint64_t address[1];
|
||||
};
|
||||
|
||||
struct EbpfOpLoadRequest {
|
||||
struct EbpfOpHeader header;
|
||||
uint8_t machine_code[1];
|
||||
};
|
||||
|
||||
struct EbpfOpLoadReply {
|
||||
struct EbpfOpHeader header;
|
||||
uint64_t handle;
|
||||
};
|
||||
|
||||
struct EbpfOpAttachDetachRequest {
|
||||
struct EbpfOpHeader header;
|
||||
uint64_t handle;
|
||||
uint32_t hook;
|
||||
};
|
||||
|
|
@ -131,8 +131,9 @@
|
|||
<SDLCheck>true</SDLCheck>
|
||||
<PreprocessorDefinitions>_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<ConformanceMode>true</ConformanceMode>
|
||||
<PrecompiledHeader>Use</PrecompiledHeader>
|
||||
<PrecompiledHeader>NotUsing</PrecompiledHeader>
|
||||
<PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
|
||||
<AdditionalIncludeDirectories>$(UbpfDir)/inc;$(UbpfDir);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
|
||||
</ClCompile>
|
||||
<Link>
|
||||
<SubSystem>
|
||||
|
|
|
|||
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Ссылка в новой задаче