| // ehframe.h -- handle exception frame sections for gold -*- C++ -*- |
| |
| // Copyright 2006, 2007 Free Software Foundation, Inc. |
| // Written by Ian Lance Taylor <iant@google.com>. |
| |
| // This file is part of gold. |
| |
| // This program is free software; you can redistribute it and/or modify |
| // it under the terms of the GNU General Public License as published by |
| // the Free Software Foundation; either version 3 of the License, or |
| // (at your option) any later version. |
| |
| // This program is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License |
| // along with this program; if not, write to the Free Software |
| // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| // MA 02110-1301, USA. |
| |
| #ifndef GOLD_EHFRAME_H |
| #define GOLD_EHFRAME_H |
| |
| #include "output.h" |
| |
| namespace gold |
| { |
| |
| // This class manages the .eh_frame_hdr section, which holds the data |
| // for the PT_GNU_EH_FRAME segment. gcc's unwind support code uses |
| // the PT_GNU_EH_FRAME segment to find the list of FDEs. This saves |
| // the time required to register the exception handlers at startup |
| // time and when a shared object is loaded, and the time required to |
| // deregister the exception handlers when a shared object is unloaded. |
| |
| // FIXME: gcc supports using storing a sorted lookup table for the |
| // FDEs in the PT_GNU_EH_FRAME segment, but we do not yet generate |
| // that. |
| |
| class Eh_frame_hdr : public Output_section_data |
| { |
| public: |
| Eh_frame_hdr(Output_section* eh_frame_section); |
| |
| // Set the final data size. |
| void |
| do_set_address(uint64_t address, off_t offset); |
| |
| // Write the data to the file. |
| void |
| do_write(Output_file*); |
| |
| private: |
| // The .eh_frame section. |
| Output_section* eh_frame_section_; |
| }; |
| |
| } // End namespace gold. |
| |
| #endif // !defined(GOLD_EHFRAME_H) |