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55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
#include "mold.h"
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namespace mold::macho {
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template <typename E>
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InputSection<E>::InputSection(Context<E> &ctx, ObjectFile<E> &file,
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const MachSection &hdr)
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: file(file), hdr(hdr),
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osec(*OutputSection<E>::get_instance(ctx, hdr.get_segname(),
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hdr.get_sectname())) {
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if (hdr.type != S_ZEROFILL)
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contents = file.mf->get_contents().substr(hdr.offset, hdr.size);
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}
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template <typename E>
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void InputSection<E>::parse_relocations(Context<E> &ctx) {
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// Parse mach-o relocations to fill `rels` vector
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rels = read_relocations(ctx, file, hdr);
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// Sort `rels` vector
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sort(rels, [](const Relocation<E> &a, const Relocation<E> &b) {
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return a.offset < b.offset;
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});
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// Find subsections this relocation section refers to
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auto cmp = [](Subsection<E> *subsec, u32 addr) {
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return subsec->input_addr < addr;
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};
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auto begin = std::lower_bound(file.subsections.begin(),
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file.subsections.end(), hdr.addr, cmp);
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auto end = std::lower_bound(begin, file.subsections.end(),
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hdr.addr + hdr.size, cmp);
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// Assign each subsection a group of relocations
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i64 i = 0;
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for (auto it = begin; it < end; it++) {
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Subsection<E> &subsec = **it;
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subsec.rel_offset = i;
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while (i < rels.size() &&
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rels[i].offset < subsec.input_offset + subsec.input_size) {
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rels[i].offset -= subsec.input_offset;
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i++;
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}
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subsec.nrels = i - subsec.rel_offset;
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}
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}
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#define INSTANTIATE(E) \
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template class InputSection<E>
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INSTANTIATE_ALL;
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} // namespace mold::macho
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