1 /*
2 * Copyright (c) 2015 PLUMgrid, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "parser.h"
18 #include "type_check.h"
19 #include "codegen_llvm.h"
20 #include "loader.h"
21
22 using std::string;
23 using std::unique_ptr;
24 using std::vector;
25
26 namespace ebpf {
27
BLoader(unsigned flags)28 BLoader::BLoader(unsigned flags) : flags_(flags) {
29 (void)flags_;
30 }
31
~BLoader()32 BLoader::~BLoader() {
33 }
34
parse(llvm::Module * mod,const string & filename,const string & proto_filename,TableStorage & ts,const string & id,const std::string & maps_ns)35 int BLoader::parse(llvm::Module *mod, const string &filename, const string &proto_filename,
36 TableStorage &ts, const string &id, const std::string &maps_ns) {
37 int rc;
38
39 proto_parser_ = make_unique<ebpf::cc::Parser>(proto_filename);
40 rc = proto_parser_->parse();
41 if (rc) {
42 fprintf(stderr, "In file: %s\n", filename.c_str());
43 return rc;
44 }
45
46 parser_ = make_unique<ebpf::cc::Parser>(filename);
47 rc = parser_->parse();
48 if (rc) {
49 fprintf(stderr, "In file: %s\n", filename.c_str());
50 return rc;
51 }
52
53 //ebpf::cc::Printer printer(stderr);
54 //printer.visit(parser_->root_node_);
55
56 ebpf::cc::TypeCheck type_check(parser_->scopes_.get(), proto_parser_->scopes_.get());
57 auto ret = type_check.visit(parser_->root_node_);
58 if (ret.code() != 0 || ret.msg().size()) {
59 fprintf(stderr, "Type error @line=%d: %s\n", ret.code(), ret.msg().c_str());
60 return -1;
61 }
62
63 codegen_ = ebpf::make_unique<ebpf::cc::CodegenLLVM>(mod, parser_->scopes_.get(), proto_parser_->scopes_.get());
64 ret = codegen_->visit(parser_->root_node_, ts, id, maps_ns);
65 if (ret.code() != 0 || ret.msg().size()) {
66 fprintf(stderr, "Codegen error @line=%d: %s\n", ret.code(), ret.msg().c_str());
67 return ret.code();
68 }
69
70 return 0;
71 }
72
73 } // namespace ebpf
74