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author | Ian Lance Taylor <iant@google.com> | 2007-09-26 05:44:38 +0000 |
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committer | Ian Lance Taylor <iant@google.com> | 2007-09-26 05:44:38 +0000 |
commit | 3151305a47fc17a35bc76cc50578b3e8f9b93d9d (patch) | |
tree | 7579f01394de3af6a03a35d162ae8c59fefaf9a8 /gold/ehframe.h | |
parent | 4dffcebc10670489b064181a62e9588e72fb566a (diff) | |
download | gdb-3151305a47fc17a35bc76cc50578b3e8f9b93d9d.zip gdb-3151305a47fc17a35bc76cc50578b3e8f9b93d9d.tar.gz gdb-3151305a47fc17a35bc76cc50578b3e8f9b93d9d.tar.bz2 |
Add basic exception frame header, plus test.
Diffstat (limited to 'gold/ehframe.h')
-rw-r--r-- | gold/ehframe.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/gold/ehframe.h b/gold/ehframe.h new file mode 100644 index 0000000..1f6c022 --- /dev/null +++ b/gold/ehframe.h @@ -0,0 +1,64 @@ +// 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(const Target*, 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 output target. + const Target* target_; + // The .eh_frame section. + Output_section* eh_frame_section_; +}; + +} // End namespace gold. + +#endif // !defined(GOLD_EHFRAME_H) |