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elf+aarch64: implement some scanReloc logic

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This commit is contained in:
Jakub Konka 2024-02-21 22:07:51 +01:00
parent ee364d542a
commit d7d47a2c0c
1 changed files with 59 additions and 0 deletions
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59
src/link/Elf/Atom.zig
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@ -438,6 +438,10 @@ pub fn scanRelocs(self: Atom, elf_file: *Elf, code: ?[]const u8, undefs: anytype
error.RelocFailure => has_reloc_errors = true,
else => |e| return e,
},
.aarch64 => aarch64.scanReloc(self, elf_file, rel, symbol, code, &it) catch |err| switch (err) {
error.RelocFailure => has_reloc_errors = true,
else => |e| return e,
},
else => return error.UnsupportedCpuArch,
}
}
@ -1549,6 +1553,61 @@ const x86_64 = struct {
const Instruction = encoder.Instruction;
};
const aarch64 = struct {
fn scanReloc(
atom: Atom,
elf_file: *Elf,
rel: elf.Elf64_Rela,
symbol: *Symbol,
code: ?[]const u8,
it: *RelocsIterator,
) !void {
_ = code;
_ = it;
const r_type: elf.R_AARCH64 = @enumFromInt(rel.r_type());
switch (r_type) {
.ABS64 => {
try atom.scanReloc(symbol, rel, dynAbsRelocAction(symbol, elf_file), elf_file);
},
.ADR_PREL_PG_HI21 => {
try atom.scanReloc(symbol, rel, pcRelocAction(symbol, elf_file), elf_file);
},
.ADR_GOT_PAGE => {
// TODO: relax if possible
symbol.flags.needs_got = true;
},
.LD64_GOT_LO12_NC,
.LD64_GOTPAGE_LO15,
=> {
symbol.flags.needs_got = true;
},
.CALL26,
.JUMP26,
=> {
if (symbol.flags.import) {
symbol.flags.needs_plt = true;
}
},
.ADD_ABS_LO12_NC,
.ADR_PREL_LO21,
.LDST8_ABS_LO12_NC,
.LDST16_ABS_LO12_NC,
.LDST32_ABS_LO12_NC,
.LDST64_ABS_LO12_NC,
.LDST128_ABS_LO12_NC,
=> {},
else => try atom.reportUnhandledRelocError(rel, elf_file),
}
}
};
const ResolveArgs = struct { i64, i64, i64, i64, i64, i64, i64, i64 };
const RelocError = error{