From 0f57cc9750282ce0284fe69b06f161dea2bfc8cb Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Sun, 17 Jul 2016 16:03:47 +0200
Subject: parser/lexer: o Support special '/DISCARD/' as NAME. o Add 'SORT' as
 a token. It is equivalent with SORT_BY_NAME. The new rule sort_by_name
 coverts both. Ld: o Don't die on unknown sections, they can be referenced
 before declared. Doesn't matter for this app anyway.

---
 Ld.cpp | 49 ++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 44 insertions(+), 5 deletions(-)

(limited to 'Ld.cpp')

diff --git a/Ld.cpp b/Ld.cpp
index a60656c..8bacaea 100644
--- a/Ld.cpp
+++ b/Ld.cpp
@@ -39,14 +39,18 @@ public:
     }
 
     virtual V get(ParseTree *const node) {
+        return _annotations.at(node);
+    }
+
+//    virtual V get(ParseTree *const node) {
 //        try {
 //             cout << "node = " << node->getText() << endl;
-            return _annotations.at(node);
+//        return _annotations.at(node);
 //        } catch (std::out_of_range &e) {
 //             cout << "out of range: " << node->getText() << endl;
 //            throw e;
 //        }
-    }
+//    }
 
     virtual void put(ParseTree *const node, V value) {
         // cout << "put(" << node << ", " << value << ")" << endl;
@@ -88,7 +92,8 @@ public:
                 return s;
             }
         }
-        throw out_of_range("No such section: " + name);
+        sections.emplace_back(Section{.name = name});
+        return sections[sections.size() - 1];
     }
 
     static uint64_t parseInt(const string &s) {
@@ -218,8 +223,34 @@ public:
 LdScriptLoader::LdScriptLoader() : debug_(false) {
 }
 
+class LdErrorListener : public BaseErrorListener {
+public:
+    std::vector<std::string> messages;
+
+    void syntaxError(IRecognizer *recognizer, Token *offendingSymbol, size_t line, int charPositionInLine,
+                     const std::string &msg, std::exception_ptr e) override {
+        messages.push_back(msg);
+    }
+};
+
 LdScript LdScriptLoader::load(std::string path) {
-    ANTLRFileStream input(path);
+    std::ifstream stream(path, std::ios::binary);
+
+    if (!stream.good() || stream.eof()) {
+        return {};
+    }
+
+    string data;
+    while (!stream.eof()) {
+        char buf[1000];
+        stream.read(buf, sizeof(buf));
+        auto count = stream.gcount();
+        for (int i = 0; i < count; i++) {
+            data.push_back((char) (buf[i] & 0x7f));
+        }
+    }
+
+    ANTLRInputStream input(data);
     GnuLdLexer lexer(&input);
     CommonTokenStream tokens(&lexer);
     tokens.fill();
@@ -233,9 +264,17 @@ LdScript LdScriptLoader::load(std::string path) {
     GnuLdParser parser(&tokens);
     ElfinfoGnuLdBaseListener listener;
     parser.addParseListener(&listener);
+
+    LdErrorListener ldErrorListener;
+    parser.addErrorListener(&ldErrorListener);
+
     auto file = parser.file();
 
-    if (debug_) {
+    if (!ldErrorListener.messages.empty()) {
+        throw LdParseException(ldErrorListener.messages);
+    }
+
+    if (debug_ && parser.getNumberOfSyntaxErrors() == 0) {
         std::cout << file->toStringTree(&parser) << std::endl << std::endl;
     }
 
-- 
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