Added "plugin" command

Makefile

@@ -151,6 +151,7 @@ OBJS += passes/cmds/show.o
 OBJS += passes/cmds/stat.o
 OBJS += passes/cmds/cover.o
 OBJS += passes/cmds/design.o
+OBJS += passes/cmds/plugin.o
 
 include passes/proc/Makefile.inc
 include passes/opt/Makefile.inc

kernel/driver.cc

@@ -27,7 +27,6 @@
 #include <string.h>
 #include <unistd.h>
 #include <libgen.h>
-#include <dlfcn.h>
 #include <limits.h>
 #include <errno.h>
 
@@ -38,7 +37,7 @@ int main(int argc, char **argv)
 	std::string frontend_command = "auto";
 	std::string backend_command = "auto";
 	std::vector<std::string> passes_commands;
-	std::vector<void*> loaded_modules;
+	std::vector<std::string> plugin_filenames;
 	std::string output_filename = "";
 	std::string scriptfile = "";
 	bool scriptfile_tcl = false;
@@ -82,11 +81,7 @@ int main(int argc, char **argv)
 			passes_commands.push_back("opt");
 			break;
 		case 'm':
-			loaded_modules.push_back(dlopen(optarg, RTLD_LAZY|RTLD_GLOBAL));
-			if (loaded_modules.back() == NULL) {
-				fprintf(stderr, "Can't load module `%s': %s\n", optarg, dlerror());
-				exit(1);
-			}
+			plugin_filenames.push_back(optarg);
 			break;
 		case 'f':
 			frontend_command = optarg;
@@ -239,6 +234,9 @@ int main(int argc, char **argv)
 
 	yosys_setup();
 
+	for (auto &fn : plugin_filenames)
+		load_plugin(fn, {});
+
 	if (optind == argc && passes_commands.size() == 0 && scriptfile.empty()) {
 		if (!got_output_filename)
 			backend_command = "";
@@ -346,9 +344,6 @@ int main(int argc, char **argv)
 
 	yosys_shutdown();
 
-	for (auto mod : loaded_modules)
-		dlclose(mod);
-
 	return 0;
 }
 

kernel/yosys.cc

@@ -22,6 +22,7 @@
 #include <readline/readline.h>
 #include <readline/history.h>
 
+#include <dlfcn.h>
 #include <unistd.h>
 #include <limits.h>
 
@@ -98,6 +99,12 @@ void yosys_shutdown()
 		yosys_tcl_interp = NULL;
 	}
 #endif
+
+	for (auto &it : loaded_plugins)
+		dlclose(it.second);
+
+	loaded_plugins.clear();
+	loaded_plugin_aliases.clear();
 }
 
 RTLIL::IdString new_id(std::string file, int line, std::string func)

kernel/yosys.h

@@ -132,6 +132,11 @@ extern const char *yosys_version_str;
 extern std::map<std::string, RTLIL::Design*> saved_designs;
 extern std::vector<RTLIL::Design*> pushed_designs;
 
+// from passes/cmds/pluginc.cc
+extern std::map<std::string, void*> loaded_plugins;
+extern std::map<std::string, std::string> loaded_plugin_aliases;
+void load_plugin(std::string filename, std::vector<std::string> aliases);
+
 YOSYS_NAMESPACE_END
 
 #endif

passes/cmds/Makefile.inc

@@ -21,4 +21,5 @@ OBJS += passes/cmds/connwrappers.o
 OBJS += passes/cmds/cover.o
 OBJS += passes/cmds/trace.o
 OBJS += passes/cmds/wreduce.o
+OBJS += passes/cmds/plugin.o
 

passes/cmds/plugin.cc

@@ -0,0 +1,117 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2014  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "kernel/yosys.h"
+#include <dlfcn.h>
+
+YOSYS_NAMESPACE_BEGIN
+
+std::map<std::string, void*> loaded_plugins;
+std::map<std::string, std::string> loaded_plugin_aliases;
+
+void load_plugin(std::string filename, std::vector<std::string> aliases)
+{
+	if (filename.find('/') == std::string::npos)
+		filename = "./" + filename;
+
+	if (!loaded_plugins.count(filename)) {
+		void *hdl = dlopen(filename.c_str(), RTLD_LAZY|RTLD_LOCAL);
+		if (hdl == NULL)
+			log_cmd_error("Can't load module `%s': %s\n", filename.c_str(), dlerror());
+		loaded_plugins[filename] = hdl;
+		Pass::init_register();
+	}
+
+	for (auto &alias : aliases)
+		loaded_plugin_aliases[alias] = filename;
+}
+
+struct PluginPass : public Pass {
+	PluginPass() : Pass("plugin", "load and list loaded plugins") { }
+	virtual void help()
+	{
+		//   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
+		log("\n");
+		log("    plugin [options]\n");
+		log("\n");
+		log("Load and list loaded plugins.\n");
+		log("\n");
+		log("    -i <plugin_filename>\n");
+		log("        Load (install) the specified plugin.\n");
+		log("\n");
+		log("    -a <alias_name>\n");
+		log("        Register the specified alias name for the loaded plugin\n");
+		log("\n");
+		log("    -l\n");
+		log("        List loaded plugins\n");
+		log("\n");
+	}
+	virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
+	{
+		std::string plugin_filename;
+		std::vector<std::string> plugin_aliases;
+		bool list_mode = false;
+
+		size_t argidx;
+		for (argidx = 1; argidx < args.size(); argidx++)
+		{
+			if ((args[argidx] == "-i") && argidx+1 < args.size() && plugin_filename.empty()) {
+				plugin_filename = args[++argidx];
+				continue;
+			}
+			if ((args[argidx] == "-a") && argidx+1 < args.size()) {
+				plugin_aliases.push_back(args[++argidx]);
+				continue;
+			}
+			if (args[argidx] == "-l") {
+				list_mode = true;
+				continue;
+			}
+			break;
+		}
+		extra_args(args, argidx, design, false);
+
+		if (!plugin_filename.empty())
+			load_plugin(plugin_filename, plugin_aliases);
+
+		if (list_mode)
+		{
+			log("\n");
+			if (loaded_plugins.empty())
+				log("No plugins loaded.\n");
+			else
+				log("Loaded plugins:\n");
+
+			for (auto &it : loaded_plugins)
+				log("  %s\n", it.first.c_str());
+
+			if (!loaded_plugin_aliases.empty()) {
+				log("\n");
+				int max_alias_len = 1;
+				for (auto &it : loaded_plugin_aliases)
+					max_alias_len = std::max(max_alias_len, SIZE(it.first));
+				for (auto &it : loaded_plugin_aliases)
+					log("Alias: %-*s %s\n", max_alias_len, it.first.c_str(), it.second.c_str());
+			}
+		}
+	}
+} PluginPass;
+
+YOSYS_NAMESPACE_END
+