104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
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// Copyright (c) 2013 Austin T. Clements. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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#include "internal.hh"
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using namespace std;
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DWARFPP_BEGIN_NAMESPACE
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rangelist::rangelist(const std::shared_ptr<section> &sec, section_offset off,
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unsigned cu_addr_size, taddr cu_low_pc)
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: sec(sec->slice(off, ~0, format::unknown, cu_addr_size)),
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base_addr(cu_low_pc)
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{
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}
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rangelist::rangelist(const initializer_list<pair<taddr, taddr> > &ranges)
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{
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synthetic.reserve(ranges.size() * 2 + 2);
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for (auto &range : ranges) {
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synthetic.push_back(range.first);
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synthetic.push_back(range.second);
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}
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synthetic.push_back(0);
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synthetic.push_back(0);
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sec = make_shared<section>(
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section_type::ranges, (const char*)synthetic.data(),
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synthetic.size() * sizeof(taddr),
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native_order(), format::unknown, sizeof(taddr));
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base_addr = 0;
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}
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rangelist::iterator
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rangelist::begin() const
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{
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if (sec)
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return iterator(sec, base_addr);
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return end();
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}
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rangelist::iterator
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rangelist::end() const
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{
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return iterator();
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}
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bool
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rangelist::contains(taddr addr) const
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{
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for (auto ent : *this)
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if (ent.contains(addr))
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return true;
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return false;
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}
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rangelist::iterator::iterator(const std::shared_ptr<section> &sec, taddr base_addr)
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: sec(sec), base_addr(base_addr), pos(0)
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{
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// Read in the first entry
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++(*this);
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}
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rangelist::iterator &
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rangelist::iterator::operator++()
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{
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// DWARF4 section 2.17.3
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taddr largest_offset = ~(taddr)0;
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if (sec->addr_size < sizeof(taddr))
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largest_offset += 1 << (8 * sec->addr_size);
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// Read in entries until we reach a regular entry of an
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// end-of-list. Note that pos points to the beginning of the
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// entry *following* the current entry, so that's where we
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// start.
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cursor cur(sec, pos);
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while (true) {
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entry.low = cur.address();
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entry.high = cur.address();
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if (entry.low == 0 && entry.high == 0) {
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// End of list
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sec.reset();
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pos = 0;
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break;
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} else if (entry.low == largest_offset) {
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// Base address change
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base_addr = entry.high;
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} else {
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// Regular entry. Adjust by base address.
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entry.low += base_addr;
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entry.high += base_addr;
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pos = cur.get_section_offset();
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break;
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}
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}
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return *this;
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}
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DWARFPP_END_NAMESPACE
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