mirror of
https://github.com/autc04/Retro68.git
synced 2024-08-28 19:29:05 +00:00
1060 lines
27 KiB
C++
1060 lines
27 KiB
C++
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// plugin.cc -- plugin manager for gold -*- C++ -*-
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// Copyright 2008, 2009 Free Software Foundation, Inc.
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// Written by Cary Coutant <ccoutant@google.com>.
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// This file is part of gold.
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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// MA 02110-1301, USA.
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#include "gold.h"
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#include <cstdio>
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#include <cstdarg>
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#include <cstring>
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#include <string>
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#include <vector>
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#ifdef ENABLE_PLUGINS
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#include <dlfcn.h>
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#endif
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#include "parameters.h"
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#include "errors.h"
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#include "fileread.h"
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#include "layout.h"
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#include "options.h"
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#include "plugin.h"
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#include "target.h"
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#include "readsyms.h"
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#include "symtab.h"
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#include "elfcpp.h"
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namespace gold
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{
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#ifdef ENABLE_PLUGINS
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// The linker's exported interfaces.
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extern "C"
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{
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static enum ld_plugin_status
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register_claim_file(ld_plugin_claim_file_handler handler);
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static enum ld_plugin_status
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register_all_symbols_read(ld_plugin_all_symbols_read_handler handler);
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static enum ld_plugin_status
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register_cleanup(ld_plugin_cleanup_handler handler);
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static enum ld_plugin_status
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add_symbols(void *handle, int nsyms, const struct ld_plugin_symbol *syms);
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static enum ld_plugin_status
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get_input_file(const void *handle, struct ld_plugin_input_file *file);
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static enum ld_plugin_status
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release_input_file(const void *handle);
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static enum ld_plugin_status
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get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms);
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static enum ld_plugin_status
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add_input_file(char *pathname);
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static enum ld_plugin_status
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add_input_library(char *pathname);
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static enum ld_plugin_status
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message(int level, const char *format, ...);
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};
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#endif // ENABLE_PLUGINS
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static Pluginobj* make_sized_plugin_object(Input_file* input_file,
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off_t offset, off_t filesize);
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// Plugin methods.
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// Load one plugin library.
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void
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Plugin::load()
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{
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#ifdef ENABLE_PLUGINS
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// Load the plugin library.
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// FIXME: Look for the library in standard locations.
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this->handle_ = dlopen(this->filename_.c_str(), RTLD_NOW);
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if (this->handle_ == NULL)
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{
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gold_error(_("%s: could not load plugin library"),
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this->filename_.c_str());
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return;
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}
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// Find the plugin's onload entry point.
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ld_plugin_onload onload = reinterpret_cast<ld_plugin_onload>
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(dlsym(this->handle_, "onload"));
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if (onload == NULL)
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{
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gold_error(_("%s: could not find onload entry point"),
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this->filename_.c_str());
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return;
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}
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// Get the linker's version number.
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const char* ver = get_version_string();
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int major = 0;
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int minor = 0;
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sscanf(ver, "%d.%d", &major, &minor);
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// Allocate and populate a transfer vector.
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const int tv_fixed_size = 14;
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int tv_size = this->args_.size() + tv_fixed_size;
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ld_plugin_tv *tv = new ld_plugin_tv[tv_size];
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// Put LDPT_MESSAGE at the front of the list so the plugin can use it
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// while processing subsequent entries.
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int i = 0;
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tv[i].tv_tag = LDPT_MESSAGE;
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tv[i].tv_u.tv_message = message;
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++i;
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tv[i].tv_tag = LDPT_API_VERSION;
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tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION;
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++i;
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tv[i].tv_tag = LDPT_GOLD_VERSION;
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tv[i].tv_u.tv_val = major * 100 + minor;
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++i;
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tv[i].tv_tag = LDPT_LINKER_OUTPUT;
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if (parameters->options().relocatable())
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tv[i].tv_u.tv_val = LDPO_REL;
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else if (parameters->options().shared())
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tv[i].tv_u.tv_val = LDPO_DYN;
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else
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tv[i].tv_u.tv_val = LDPO_EXEC;
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for (unsigned int j = 0; j < this->args_.size(); ++j)
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{
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++i;
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tv[i].tv_tag = LDPT_OPTION;
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tv[i].tv_u.tv_string = this->args_[j].c_str();
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}
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++i;
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tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK;
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tv[i].tv_u.tv_register_claim_file = register_claim_file;
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++i;
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tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK;
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tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read;
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++i;
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tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK;
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tv[i].tv_u.tv_register_cleanup = register_cleanup;
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++i;
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tv[i].tv_tag = LDPT_ADD_SYMBOLS;
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tv[i].tv_u.tv_add_symbols = add_symbols;
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++i;
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tv[i].tv_tag = LDPT_GET_INPUT_FILE;
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tv[i].tv_u.tv_get_input_file = get_input_file;
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++i;
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tv[i].tv_tag = LDPT_RELEASE_INPUT_FILE;
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tv[i].tv_u.tv_release_input_file = release_input_file;
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++i;
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tv[i].tv_tag = LDPT_GET_SYMBOLS;
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tv[i].tv_u.tv_get_symbols = get_symbols;
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++i;
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tv[i].tv_tag = LDPT_ADD_INPUT_FILE;
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tv[i].tv_u.tv_add_input_file = add_input_file;
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++i;
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tv[i].tv_tag = LDPT_ADD_INPUT_LIBRARY;
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tv[i].tv_u.tv_add_input_library = add_input_library;
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++i;
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tv[i].tv_tag = LDPT_NULL;
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tv[i].tv_u.tv_val = 0;
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gold_assert(i == tv_size - 1);
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// Call the onload entry point.
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(*onload)(tv);
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delete[] tv;
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#endif // ENABLE_PLUGINS
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}
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// Call the plugin claim-file handler.
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inline bool
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Plugin::claim_file(struct ld_plugin_input_file *plugin_input_file)
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{
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int claimed = 0;
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if (this->claim_file_handler_ != NULL)
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{
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(*this->claim_file_handler_)(plugin_input_file, &claimed);
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if (claimed)
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return true;
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}
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return false;
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}
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// Call the all-symbols-read handler.
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inline void
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Plugin::all_symbols_read()
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{
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if (this->all_symbols_read_handler_ != NULL)
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(*this->all_symbols_read_handler_)();
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}
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// Call the cleanup handler.
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inline void
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Plugin::cleanup()
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{
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if (this->cleanup_handler_ != NULL)
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(*this->cleanup_handler_)();
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}
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// Plugin_manager methods.
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Plugin_manager::~Plugin_manager()
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{
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for (Plugin_list::iterator p = this->plugins_.begin();
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p != this->plugins_.end();
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++p)
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delete *p;
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this->plugins_.clear();
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for (Object_list::iterator obj = this->objects_.begin();
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obj != this->objects_.end();
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++obj)
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delete *obj;
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this->objects_.clear();
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}
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// Load all plugin libraries.
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void
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Plugin_manager::load_plugins()
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{
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for (this->current_ = this->plugins_.begin();
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this->current_ != this->plugins_.end();
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++this->current_)
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(*this->current_)->load();
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}
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// Call the plugin claim-file handlers in turn to see if any claim the file.
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Pluginobj*
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Plugin_manager::claim_file(Input_file* input_file, off_t offset,
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off_t filesize)
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{
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if (this->in_replacement_phase_)
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return NULL;
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unsigned int handle = this->objects_.size();
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this->input_file_ = input_file;
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this->plugin_input_file_.name = input_file->filename().c_str();
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this->plugin_input_file_.fd = input_file->file().descriptor();
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this->plugin_input_file_.offset = offset;
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this->plugin_input_file_.filesize = filesize;
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this->plugin_input_file_.handle = reinterpret_cast<void*>(handle);
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for (this->current_ = this->plugins_.begin();
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this->current_ != this->plugins_.end();
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++this->current_)
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{
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if ((*this->current_)->claim_file(&this->plugin_input_file_))
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{
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if (this->objects_.size() > handle)
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return this->objects_[handle];
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// If the plugin claimed the file but did not call the
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// add_symbols callback, we need to create the Pluginobj now.
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Pluginobj* obj = this->make_plugin_object(handle);
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return obj;
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}
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}
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return NULL;
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}
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// Call the all-symbols-read handlers.
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void
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Plugin_manager::all_symbols_read(Workqueue* workqueue, Task* task,
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Input_objects* input_objects,
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Symbol_table* symtab, Layout* layout,
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Dirsearch* dirpath, Mapfile* mapfile,
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Task_token** last_blocker)
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{
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this->in_replacement_phase_ = true;
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this->workqueue_ = workqueue;
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this->task_ = task;
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this->input_objects_ = input_objects;
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this->symtab_ = symtab;
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this->layout_ = layout;
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this->dirpath_ = dirpath;
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this->mapfile_ = mapfile;
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this->this_blocker_ = NULL;
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for (this->current_ = this->plugins_.begin();
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this->current_ != this->plugins_.end();
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++this->current_)
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(*this->current_)->all_symbols_read();
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*last_blocker = this->this_blocker_;
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}
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// Layout deferred objects.
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void
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Plugin_manager::layout_deferred_objects()
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{
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Deferred_layout_list::iterator obj;
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for (obj = this->deferred_layout_objects_.begin();
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obj != this->deferred_layout_objects_.end();
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++obj)
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(*obj)->layout_deferred_sections(this->layout_);
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}
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// Call the cleanup handlers.
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void
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Plugin_manager::cleanup()
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{
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if (this->cleanup_done_)
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return;
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for (this->current_ = this->plugins_.begin();
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this->current_ != this->plugins_.end();
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++this->current_)
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(*this->current_)->cleanup();
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this->cleanup_done_ = true;
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}
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// Make a new Pluginobj object. This is called when the plugin calls
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// the add_symbols API.
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Pluginobj*
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Plugin_manager::make_plugin_object(unsigned int handle)
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{
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// Make sure we aren't asked to make an object for the same handle twice.
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if (this->objects_.size() != handle)
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return NULL;
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Pluginobj* obj = make_sized_plugin_object(this->input_file_,
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this->plugin_input_file_.offset,
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this->plugin_input_file_.filesize);
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this->objects_.push_back(obj);
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return obj;
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}
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// Get the input file information with an open (possibly re-opened)
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// file descriptor.
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ld_plugin_status
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Plugin_manager::get_input_file(unsigned int handle,
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struct ld_plugin_input_file *file)
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{
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Pluginobj* obj = this->object(handle);
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if (obj == NULL)
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return LDPS_BAD_HANDLE;
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obj->lock(this->task_);
|
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file->name = obj->filename().c_str();
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file->fd = obj->descriptor();
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file->offset = obj->offset();
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file->filesize = obj->filesize();
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file->handle = reinterpret_cast<void*>(handle);
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return LDPS_OK;
|
||
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}
|
||
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||
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// Release the input file.
|
||
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|
||
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ld_plugin_status
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Plugin_manager::release_input_file(unsigned int handle)
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||
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{
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||
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Pluginobj* obj = this->object(handle);
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if (obj == NULL)
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return LDPS_BAD_HANDLE;
|
||
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|
||
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obj->unlock(this->task_);
|
||
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return LDPS_OK;
|
||
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}
|
||
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||
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// Add a new input file.
|
||
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|
||
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ld_plugin_status
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Plugin_manager::add_input_file(char *pathname, bool is_lib)
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||
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{
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||
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Input_file_argument file(pathname,
|
||
|
(is_lib
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||
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? Input_file_argument::INPUT_FILE_TYPE_LIBRARY
|
||
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: Input_file_argument::INPUT_FILE_TYPE_FILE),
|
||
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"", false, this->options_);
|
||
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Input_argument* input_argument = new Input_argument(file);
|
||
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Task_token* next_blocker = new Task_token(true);
|
||
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next_blocker->add_blocker();
|
||
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if (this->layout_->incremental_inputs())
|
||
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gold_error(_("Input files added by plug-ins in --incremental mode not "
|
||
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"supported yet.\n"));
|
||
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this->workqueue_->queue_soon(new Read_symbols(this->input_objects_,
|
||
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this->symtab_,
|
||
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this->layout_,
|
||
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this->dirpath_,
|
||
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0,
|
||
|
this->mapfile_,
|
||
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input_argument,
|
||
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NULL,
|
||
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this->this_blocker_,
|
||
|
next_blocker));
|
||
|
this->this_blocker_ = next_blocker;
|
||
|
return LDPS_OK;
|
||
|
}
|
||
|
|
||
|
// Class Pluginobj.
|
||
|
|
||
|
Pluginobj::Pluginobj(const std::string& name, Input_file* input_file,
|
||
|
off_t offset, off_t filesize)
|
||
|
: Object(name, input_file, false, offset),
|
||
|
nsyms_(0), syms_(NULL), symbols_(), filesize_(filesize), comdat_map_()
|
||
|
{
|
||
|
}
|
||
|
|
||
|
// Return TRUE if a defined symbol might be reachable from outside the
|
||
|
// universe of claimed objects.
|
||
|
|
||
|
static inline bool
|
||
|
is_visible_from_outside(Symbol* lsym)
|
||
|
{
|
||
|
if (lsym->in_real_elf())
|
||
|
return true;
|
||
|
if (parameters->options().relocatable())
|
||
|
return true;
|
||
|
if (parameters->options().export_dynamic() || parameters->options().shared())
|
||
|
return lsym->is_externally_visible();
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
// Get symbol resolution info.
|
||
|
|
||
|
ld_plugin_status
|
||
|
Pluginobj::get_symbol_resolution_info(int nsyms, ld_plugin_symbol* syms) const
|
||
|
{
|
||
|
if (nsyms > this->nsyms_)
|
||
|
return LDPS_NO_SYMS;
|
||
|
for (int i = 0; i < nsyms; i++)
|
||
|
{
|
||
|
ld_plugin_symbol* isym = &syms[i];
|
||
|
Symbol* lsym = this->symbols_[i];
|
||
|
ld_plugin_symbol_resolution res = LDPR_UNKNOWN;
|
||
|
|
||
|
if (lsym->is_undefined())
|
||
|
// The symbol remains undefined.
|
||
|
res = LDPR_UNDEF;
|
||
|
else if (isym->def == LDPK_UNDEF
|
||
|
|| isym->def == LDPK_WEAKUNDEF
|
||
|
|| isym->def == LDPK_COMMON)
|
||
|
{
|
||
|
// The original symbol was undefined or common.
|
||
|
if (lsym->source() != Symbol::FROM_OBJECT)
|
||
|
res = LDPR_RESOLVED_EXEC;
|
||
|
else if (lsym->object()->pluginobj() != NULL)
|
||
|
res = LDPR_RESOLVED_IR;
|
||
|
else if (lsym->object()->is_dynamic())
|
||
|
res = LDPR_RESOLVED_DYN;
|
||
|
else
|
||
|
res = LDPR_RESOLVED_EXEC;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
// The original symbol was a definition.
|
||
|
if (lsym->source() != Symbol::FROM_OBJECT)
|
||
|
res = LDPR_PREEMPTED_REG;
|
||
|
else if (lsym->object() == static_cast<const Object*>(this))
|
||
|
res = (is_visible_from_outside(lsym)
|
||
|
? LDPR_PREVAILING_DEF
|
||
|
: LDPR_PREVAILING_DEF_IRONLY);
|
||
|
else
|
||
|
res = (lsym->object()->pluginobj() != NULL
|
||
|
? LDPR_PREEMPTED_IR
|
||
|
: LDPR_PREEMPTED_REG);
|
||
|
}
|
||
|
isym->resolution = res;
|
||
|
}
|
||
|
return LDPS_OK;
|
||
|
}
|
||
|
|
||
|
// Return TRUE if the comdat group with key COMDAT_KEY from this object
|
||
|
// should be kept.
|
||
|
|
||
|
bool
|
||
|
Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout)
|
||
|
{
|
||
|
std::pair<Comdat_map::iterator, bool> ins =
|
||
|
this->comdat_map_.insert(std::make_pair(comdat_key, false));
|
||
|
|
||
|
// If this is the first time we've seen this comdat key, ask the
|
||
|
// layout object whether it should be included.
|
||
|
if (ins.second)
|
||
|
ins.first->second = layout->find_or_add_kept_section(comdat_key,
|
||
|
NULL, 0, true,
|
||
|
true, NULL);
|
||
|
|
||
|
return ins.first->second;
|
||
|
}
|
||
|
|
||
|
// Class Sized_pluginobj.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
Sized_pluginobj<size, big_endian>::Sized_pluginobj(
|
||
|
const std::string& name,
|
||
|
Input_file* input_file,
|
||
|
off_t offset,
|
||
|
off_t filesize)
|
||
|
: Pluginobj(name, input_file, offset, filesize)
|
||
|
{
|
||
|
}
|
||
|
|
||
|
// Read the symbols. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
void
|
||
|
Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*)
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
}
|
||
|
|
||
|
// Lay out the input sections. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
void
|
||
|
Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*,
|
||
|
Read_symbols_data*)
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
}
|
||
|
|
||
|
// Add the symbols to the symbol table.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
void
|
||
|
Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab,
|
||
|
Read_symbols_data*,
|
||
|
Layout* layout)
|
||
|
{
|
||
|
const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
|
||
|
unsigned char symbuf[sym_size];
|
||
|
elfcpp::Sym<size, big_endian> sym(symbuf);
|
||
|
elfcpp::Sym_write<size, big_endian> osym(symbuf);
|
||
|
|
||
|
typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type;
|
||
|
|
||
|
this->symbols_.resize(this->nsyms_);
|
||
|
|
||
|
for (int i = 0; i < this->nsyms_; ++i)
|
||
|
{
|
||
|
const struct ld_plugin_symbol *isym = &this->syms_[i];
|
||
|
const char* name = isym->name;
|
||
|
const char* ver = isym->version;
|
||
|
elfcpp::Elf_Half shndx;
|
||
|
elfcpp::STB bind;
|
||
|
elfcpp::STV vis;
|
||
|
|
||
|
if (name != NULL && name[0] == '\0')
|
||
|
name = NULL;
|
||
|
if (ver != NULL && ver[0] == '\0')
|
||
|
ver = NULL;
|
||
|
|
||
|
switch (isym->def)
|
||
|
{
|
||
|
case LDPK_WEAKDEF:
|
||
|
case LDPK_WEAKUNDEF:
|
||
|
bind = elfcpp::STB_WEAK;
|
||
|
break;
|
||
|
case LDPK_DEF:
|
||
|
case LDPK_UNDEF:
|
||
|
case LDPK_COMMON:
|
||
|
default:
|
||
|
bind = elfcpp::STB_GLOBAL;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
switch (isym->def)
|
||
|
{
|
||
|
case LDPK_DEF:
|
||
|
case LDPK_WEAKDEF:
|
||
|
shndx = elfcpp::SHN_ABS;
|
||
|
break;
|
||
|
case LDPK_COMMON:
|
||
|
shndx = elfcpp::SHN_COMMON;
|
||
|
break;
|
||
|
case LDPK_UNDEF:
|
||
|
case LDPK_WEAKUNDEF:
|
||
|
default:
|
||
|
shndx = elfcpp::SHN_UNDEF;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
switch (isym->visibility)
|
||
|
{
|
||
|
case LDPV_PROTECTED:
|
||
|
vis = elfcpp::STV_DEFAULT;
|
||
|
break;
|
||
|
case LDPV_INTERNAL:
|
||
|
vis = elfcpp::STV_DEFAULT;
|
||
|
break;
|
||
|
case LDPV_HIDDEN:
|
||
|
vis = elfcpp::STV_DEFAULT;
|
||
|
break;
|
||
|
case LDPV_DEFAULT:
|
||
|
default:
|
||
|
vis = elfcpp::STV_DEFAULT;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
if (isym->comdat_key != NULL
|
||
|
&& isym->comdat_key[0] != '\0'
|
||
|
&& !this->include_comdat_group(isym->comdat_key, layout))
|
||
|
shndx = elfcpp::SHN_UNDEF;
|
||
|
|
||
|
osym.put_st_name(0);
|
||
|
osym.put_st_value(0);
|
||
|
osym.put_st_size(static_cast<Elf_size_type>(isym->size));
|
||
|
osym.put_st_info(bind, elfcpp::STT_NOTYPE);
|
||
|
osym.put_st_other(vis, 0);
|
||
|
osym.put_st_shndx(shndx);
|
||
|
|
||
|
this->symbols_[i] =
|
||
|
symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// Get the size of a section. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
uint64_t
|
||
|
Sized_pluginobj<size, big_endian>::do_section_size(unsigned int)
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
// Get the name of a section. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
std::string
|
||
|
Sized_pluginobj<size, big_endian>::do_section_name(unsigned int)
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
return std::string();
|
||
|
}
|
||
|
|
||
|
// Return a view of the contents of a section. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
Object::Location
|
||
|
Sized_pluginobj<size, big_endian>::do_section_contents(unsigned int)
|
||
|
{
|
||
|
Location loc(0, 0);
|
||
|
|
||
|
gold_unreachable();
|
||
|
return loc;
|
||
|
}
|
||
|
|
||
|
// Return section flags. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
uint64_t
|
||
|
Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int)
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
// Return section entsize. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
uint64_t
|
||
|
Sized_pluginobj<size, big_endian>::do_section_entsize(unsigned int)
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
// Return section address. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
uint64_t
|
||
|
Sized_pluginobj<size, big_endian>::do_section_address(unsigned int)
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
// Return section type. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
unsigned int
|
||
|
Sized_pluginobj<size, big_endian>::do_section_type(unsigned int)
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
// Return the section link field. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
unsigned int
|
||
|
Sized_pluginobj<size, big_endian>::do_section_link(unsigned int)
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
// Return the section link field. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
unsigned int
|
||
|
Sized_pluginobj<size, big_endian>::do_section_info(unsigned int)
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
// Return the section alignment. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
uint64_t
|
||
|
Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int)
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
// Return the Xindex structure to use. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
Xindex*
|
||
|
Sized_pluginobj<size, big_endian>::do_initialize_xindex()
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
// Get symbol counts. Not used for plugin objects.
|
||
|
|
||
|
template<int size, bool big_endian>
|
||
|
void
|
||
|
Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts(const Symbol_table*,
|
||
|
size_t*, size_t*) const
|
||
|
{
|
||
|
gold_unreachable();
|
||
|
}
|
||
|
|
||
|
// Class Plugin_finish. This task runs after all replacement files have
|
||
|
// been added. It calls each plugin's cleanup handler.
|
||
|
|
||
|
class Plugin_finish : public Task
|
||
|
{
|
||
|
public:
|
||
|
Plugin_finish(Task_token* this_blocker, Task_token* next_blocker)
|
||
|
: this_blocker_(this_blocker), next_blocker_(next_blocker)
|
||
|
{ }
|
||
|
|
||
|
~Plugin_finish()
|
||
|
{
|
||
|
if (this->this_blocker_ != NULL)
|
||
|
delete this->this_blocker_;
|
||
|
}
|
||
|
|
||
|
Task_token*
|
||
|
is_runnable()
|
||
|
{
|
||
|
if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
|
||
|
return this->this_blocker_;
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
locks(Task_locker* tl)
|
||
|
{ tl->add(this, this->next_blocker_); }
|
||
|
|
||
|
void
|
||
|
run(Workqueue*)
|
||
|
{
|
||
|
Plugin_manager* plugins = parameters->options().plugins();
|
||
|
gold_assert(plugins != NULL);
|
||
|
plugins->cleanup();
|
||
|
}
|
||
|
|
||
|
std::string
|
||
|
get_name() const
|
||
|
{ return "Plugin_finish"; }
|
||
|
|
||
|
private:
|
||
|
Task_token* this_blocker_;
|
||
|
Task_token* next_blocker_;
|
||
|
};
|
||
|
|
||
|
// Class Plugin_hook.
|
||
|
|
||
|
Plugin_hook::~Plugin_hook()
|
||
|
{
|
||
|
}
|
||
|
|
||
|
// Return whether a Plugin_hook task is runnable.
|
||
|
|
||
|
Task_token*
|
||
|
Plugin_hook::is_runnable()
|
||
|
{
|
||
|
if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
|
||
|
return this->this_blocker_;
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
// Return a Task_locker for a Plugin_hook task. We don't need any
|
||
|
// locks here.
|
||
|
|
||
|
void
|
||
|
Plugin_hook::locks(Task_locker*)
|
||
|
{
|
||
|
}
|
||
|
|
||
|
// Run the "all symbols read" plugin hook.
|
||
|
|
||
|
void
|
||
|
Plugin_hook::run(Workqueue* workqueue)
|
||
|
{
|
||
|
gold_assert(this->options_.has_plugins());
|
||
|
this->options_.plugins()->all_symbols_read(workqueue,
|
||
|
this,
|
||
|
this->input_objects_,
|
||
|
this->symtab_,
|
||
|
this->layout_,
|
||
|
this->dirpath_,
|
||
|
this->mapfile_,
|
||
|
&this->this_blocker_);
|
||
|
workqueue->queue_soon(new Plugin_finish(this->this_blocker_,
|
||
|
this->next_blocker_));
|
||
|
}
|
||
|
|
||
|
// The C interface routines called by the plugins.
|
||
|
|
||
|
#ifdef ENABLE_PLUGINS
|
||
|
|
||
|
// Register a claim-file handler.
|
||
|
|
||
|
static enum ld_plugin_status
|
||
|
register_claim_file(ld_plugin_claim_file_handler handler)
|
||
|
{
|
||
|
gold_assert(parameters->options().has_plugins());
|
||
|
parameters->options().plugins()->set_claim_file_handler(handler);
|
||
|
return LDPS_OK;
|
||
|
}
|
||
|
|
||
|
// Register an all-symbols-read handler.
|
||
|
|
||
|
static enum ld_plugin_status
|
||
|
register_all_symbols_read(ld_plugin_all_symbols_read_handler handler)
|
||
|
{
|
||
|
gold_assert(parameters->options().has_plugins());
|
||
|
parameters->options().plugins()->set_all_symbols_read_handler(handler);
|
||
|
return LDPS_OK;
|
||
|
}
|
||
|
|
||
|
// Register a cleanup handler.
|
||
|
|
||
|
static enum ld_plugin_status
|
||
|
register_cleanup(ld_plugin_cleanup_handler handler)
|
||
|
{
|
||
|
gold_assert(parameters->options().has_plugins());
|
||
|
parameters->options().plugins()->set_cleanup_handler(handler);
|
||
|
return LDPS_OK;
|
||
|
}
|
||
|
|
||
|
// Add symbols from a plugin-claimed input file.
|
||
|
|
||
|
static enum ld_plugin_status
|
||
|
add_symbols(void* handle, int nsyms, const ld_plugin_symbol *syms)
|
||
|
{
|
||
|
gold_assert(parameters->options().has_plugins());
|
||
|
Pluginobj* obj = parameters->options().plugins()->make_plugin_object(
|
||
|
static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
|
||
|
if (obj == NULL)
|
||
|
return LDPS_ERR;
|
||
|
obj->store_incoming_symbols(nsyms, syms);
|
||
|
return LDPS_OK;
|
||
|
}
|
||
|
|
||
|
// Get the input file information with an open (possibly re-opened)
|
||
|
// file descriptor.
|
||
|
|
||
|
static enum ld_plugin_status
|
||
|
get_input_file(const void *handle, struct ld_plugin_input_file *file)
|
||
|
{
|
||
|
gold_assert(parameters->options().has_plugins());
|
||
|
unsigned int obj_index =
|
||
|
static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle));
|
||
|
return parameters->options().plugins()->get_input_file(obj_index, file);
|
||
|
}
|
||
|
|
||
|
// Release the input file.
|
||
|
|
||
|
static enum ld_plugin_status
|
||
|
release_input_file(const void *handle)
|
||
|
{
|
||
|
gold_assert(parameters->options().has_plugins());
|
||
|
unsigned int obj_index =
|
||
|
static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle));
|
||
|
return parameters->options().plugins()->release_input_file(obj_index);
|
||
|
}
|
||
|
|
||
|
// Get the symbol resolution info for a plugin-claimed input file.
|
||
|
|
||
|
static enum ld_plugin_status
|
||
|
get_symbols(const void * handle, int nsyms, ld_plugin_symbol* syms)
|
||
|
{
|
||
|
gold_assert(parameters->options().has_plugins());
|
||
|
Pluginobj* obj = parameters->options().plugins()->object(
|
||
|
static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
|
||
|
if (obj == NULL)
|
||
|
return LDPS_ERR;
|
||
|
return obj->get_symbol_resolution_info(nsyms, syms);
|
||
|
}
|
||
|
|
||
|
// Add a new (real) input file generated by a plugin.
|
||
|
|
||
|
static enum ld_plugin_status
|
||
|
add_input_file(char *pathname)
|
||
|
{
|
||
|
gold_assert(parameters->options().has_plugins());
|
||
|
return parameters->options().plugins()->add_input_file(pathname, false);
|
||
|
}
|
||
|
|
||
|
// Add a new (real) library required by a plugin.
|
||
|
|
||
|
static enum ld_plugin_status
|
||
|
add_input_library(char *pathname)
|
||
|
{
|
||
|
gold_assert(parameters->options().has_plugins());
|
||
|
return parameters->options().plugins()->add_input_file(pathname, true);
|
||
|
}
|
||
|
|
||
|
// Issue a diagnostic message from a plugin.
|
||
|
|
||
|
static enum ld_plugin_status
|
||
|
message(int level, const char * format, ...)
|
||
|
{
|
||
|
va_list args;
|
||
|
va_start(args, format);
|
||
|
|
||
|
switch (level)
|
||
|
{
|
||
|
case LDPL_INFO:
|
||
|
parameters->errors()->info(format, args);
|
||
|
break;
|
||
|
case LDPL_WARNING:
|
||
|
parameters->errors()->warning(format, args);
|
||
|
break;
|
||
|
case LDPL_ERROR:
|
||
|
default:
|
||
|
parameters->errors()->error(format, args);
|
||
|
break;
|
||
|
case LDPL_FATAL:
|
||
|
parameters->errors()->fatal(format, args);
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
va_end(args);
|
||
|
return LDPS_OK;
|
||
|
}
|
||
|
|
||
|
#endif // ENABLE_PLUGINS
|
||
|
|
||
|
// Allocate a Pluginobj object of the appropriate size and endianness.
|
||
|
|
||
|
static Pluginobj*
|
||
|
make_sized_plugin_object(Input_file* input_file, off_t offset, off_t filesize)
|
||
|
{
|
||
|
Pluginobj* obj = NULL;
|
||
|
|
||
|
parameters_force_valid_target();
|
||
|
const Target& target(parameters->target());
|
||
|
|
||
|
if (target.get_size() == 32)
|
||
|
{
|
||
|
if (target.is_big_endian())
|
||
|
#ifdef HAVE_TARGET_32_BIG
|
||
|
obj = new Sized_pluginobj<32, true>(input_file->filename(),
|
||
|
input_file, offset, filesize);
|
||
|
#else
|
||
|
gold_error(_("%s: not configured to support "
|
||
|
"32-bit big-endian object"),
|
||
|
input_file->filename().c_str());
|
||
|
#endif
|
||
|
else
|
||
|
#ifdef HAVE_TARGET_32_LITTLE
|
||
|
obj = new Sized_pluginobj<32, false>(input_file->filename(),
|
||
|
input_file, offset, filesize);
|
||
|
#else
|
||
|
gold_error(_("%s: not configured to support "
|
||
|
"32-bit little-endian object"),
|
||
|
input_file->filename().c_str());
|
||
|
#endif
|
||
|
}
|
||
|
else if (target.get_size() == 64)
|
||
|
{
|
||
|
if (target.is_big_endian())
|
||
|
#ifdef HAVE_TARGET_64_BIG
|
||
|
obj = new Sized_pluginobj<64, true>(input_file->filename(),
|
||
|
input_file, offset, filesize);
|
||
|
#else
|
||
|
gold_error(_("%s: not configured to support "
|
||
|
"64-bit big-endian object"),
|
||
|
input_file->filename().c_str());
|
||
|
#endif
|
||
|
else
|
||
|
#ifdef HAVE_TARGET_64_LITTLE
|
||
|
obj = new Sized_pluginobj<64, false>(input_file->filename(),
|
||
|
input_file, offset, filesize);
|
||
|
#else
|
||
|
gold_error(_("%s: not configured to support "
|
||
|
"64-bit little-endian object"),
|
||
|
input_file->filename().c_str());
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
gold_assert(obj != NULL);
|
||
|
return obj;
|
||
|
}
|
||
|
|
||
|
} // End namespace gold.
|