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elf: skip writing out zerofill atoms to file

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This commit is contained in:
Jakub Konka 2023-09-30 00:52:10 +02:00
parent 6c50ad6e9f
commit e72fd185e0
1 changed files with 9 additions and 6 deletions
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15
src/link/Elf.zig
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@ -1319,9 +1319,10 @@ pub fn flushModule(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node
for (zig_module.atoms.keys()) |atom_index| {
const atom_ptr = self.atom(atom_index).?;
if (!atom_ptr.flags.alive) continue;
const shdr = &self.shdrs.items[atom_ptr.outputShndx().?];
if (shdr.sh_type == elf.SHT_NOBITS) continue;
const code = try zig_module.codeAlloc(self, atom_index);
defer gpa.free(code);
const shdr = &self.shdrs.items[atom_ptr.outputShndx().?];
const file_offset = shdr.sh_offset + atom_ptr.value - shdr.sh_addr;
try atom_ptr.resolveRelocs(self, code);
try self.base.file.?.pwriteAll(code, file_offset);
@ -2862,10 +2863,6 @@ fn updateDeclCode(
try self.got.writeEntry(self, gop.index);
}
const phdr_index = self.phdr_to_shdr_table.get(shdr_index).?;
const section_offset = sym.value - self.phdrs.items[phdr_index].p_vaddr;
const file_offset = self.shdrs.items[shdr_index].sh_offset + section_offset;
if (self.base.child_pid) |pid| {
switch (builtin.os.tag) {
.linux => {
@ -2887,7 +2884,13 @@ fn updateDeclCode(
}
}
try self.base.file.?.pwriteAll(code, file_offset);
const shdr = self.shdrs.items[shdr_index];
if (shdr.sh_type != elf.SHT_NOBITS) {
const phdr_index = self.phdr_to_shdr_table.get(shdr_index).?;
const section_offset = sym.value - self.phdrs.items[phdr_index].p_vaddr;
const file_offset = shdr.sh_offset + section_offset;
try self.base.file.?.pwriteAll(code, file_offset);
}
}
pub fn updateFunc(self: *Elf, mod: *Module, func_index: InternPool.Index, air: Air, liveness: Liveness) !void {