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link/elf: handle symbols to begin/end of .eh_frame section

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This commit is contained in:
Jakub Konka 2024-04-08 22:09:49 +02:00
parent 9875ab4ee8
commit 84a0110464
1 changed files with 24 additions and 0 deletions
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24
src/link/Elf/Symbol.zig
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@ -105,6 +105,29 @@ pub fn address(symbol: Symbol, opts: struct { plt: bool = true }, elf_file: *Elf
return symbol.pltAddress(elf_file);
}
if (symbol.atom(elf_file)) |atom_ptr| {
if (!atom_ptr.flags.alive) {
if (mem.eql(u8, atom_ptr.name(elf_file), ".eh_frame")) {
const sym_name = symbol.name(elf_file);
if (mem.startsWith(u8, sym_name, "__EH_FRAME_BEGIN__") or
mem.startsWith(u8, sym_name, "__EH_FRAME_LIST__") or
mem.startsWith(u8, sym_name, ".eh_frame_seg") or
symbol.elfSym(elf_file).st_type() == elf.STT_SECTION)
{
return elf_file.shdrs.items[elf_file.eh_frame_section_index.?].sh_addr;
}
if (mem.startsWith(u8, sym_name, "__FRAME_END__") or
mem.startsWith(u8, sym_name, "__EH_FRAME_LIST_END__"))
{
const shdr = elf_file.shdrs.items[elf_file.eh_frame_section_index.?];
return shdr.sh_addr + shdr.sh_size;
}
// TODO I think we potentially should error here
}
return 0;
}
return atom_ptr.address(elf_file) + symbol.value;
}
return symbol.value;
@ -432,6 +455,7 @@ pub const Index = u32;
const assert = std.debug.assert;
const elf = std.elf;
const mem = std.mem;
const std = @import("std");
const synthetic_sections = @import("synthetic_sections.zig");