mirror of
https://github.com/rui314/mold.git
synced 2024-09-22 10:27:48 +03:00
93 lines
2.2 KiB
C++
93 lines
2.2 KiB
C++
#include "mold.h"
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#include <limits>
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template <typename E>
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void InputSection<E>::write_to(Context<E> &ctx, u8 *buf) {
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if (shdr.sh_type == SHT_NOBITS || shdr.sh_size == 0)
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return;
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// Copy data
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memcpy(buf, contents.data(), contents.size());
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// Apply relocations
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if (shdr.sh_flags & SHF_ALLOC)
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apply_reloc_alloc(ctx, buf);
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else
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apply_reloc_nonalloc(ctx, buf);
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}
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template <typename E>
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static i64 get_output_type(Context<E> &ctx) {
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if (ctx.arg.shared)
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return 0;
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if (ctx.arg.pie)
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return 1;
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return 2;
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}
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template <typename E>
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static i64 get_sym_type(Context<E> &ctx, Symbol<E> &sym) {
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if (sym.is_absolute(ctx))
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return 0;
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if (!sym.is_imported)
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return 1;
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if (sym.get_type() != STT_FUNC)
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return 2;
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return 3;
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}
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template <typename E>
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void InputSection<E>::dispatch(Context<E> &ctx, Action table[3][4],
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u16 rel_type, i64 i) {
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std::span<ElfRel<E>> rels = get_rels(ctx);
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const ElfRel<E> &rel = rels[i];
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Symbol<E> &sym = *file.symbols[rel.r_sym];
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bool is_readonly = !(shdr.sh_flags & SHF_WRITE);
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Action action = table[get_output_type(ctx)][get_sym_type(ctx, sym)];
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switch (action) {
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case NONE:
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rel_types[i] = rel_type;
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return;
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case ERROR:
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break;
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case COPYREL:
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if (!ctx.arg.z_copyreloc)
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break;
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if (sym.esym().st_visibility == STV_PROTECTED)
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Error(ctx) << *this << ": cannot make copy relocation for "
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<< " protected symbol '" << sym << "', defined in "
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<< *sym.file;
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sym.flags |= NEEDS_COPYREL;
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rel_types[i] = rel_type;
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return;
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case PLT:
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sym.flags |= NEEDS_PLT;
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rel_types[i] = rel_type;
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return;
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case DYNREL:
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if (is_readonly)
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break;
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sym.flags |= NEEDS_DYNSYM;
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rel_types[i] = R_DYN;
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file.num_dynrel++;
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return;
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case BASEREL:
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if (is_readonly)
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break;
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rel_types[i] = R_BASEREL;
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file.num_dynrel++;
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return;
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default:
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unreachable(ctx);
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}
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Error(ctx) << *this << ": " << rel_to_string<E>(rel.r_type)
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<< " relocation against symbol `" << sym
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<< "' can not be used; recompile with -fPIE";
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}
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template class InputSection<X86_64>;
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template class InputSection<I386>;
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