rui314/mold
1
1
Fork 0
mirror of https://github.com/rui314/mold.git synced 2024-09-21 09:57:18 +03:00
Code Issues Projects Releases Wiki Activity

Handle invalid sections in debug info sectionsy

Browse Source
This commit is contained in:
Rui Ueyama 2021-03-21 13:31:38 +09:00
parent 9a3df57ab3
commit 69afad0e29
2 changed files with 18 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
input_sections.cc
View File

@ -449,6 +449,17 @@ void InputSection::apply_reloc_nonalloc(u8 *base) {
write_val(rel.r_type, loc, val);
};
// Debug info section may have relocations pointing to
// non-alloc sections. Such relocations are not valid.
// We treat them as if they were pointing to address 0.
bool is_valid = (!sym.input_section ||
(sym.input_section->shdr.sh_flags & SHF_ALLOC));
if (!is_valid) {
write(0);
continue;
}
switch (rel.r_type) {
case R_X86_64_NONE:
break;
@ -457,10 +468,13 @@ void InputSection::apply_reloc_nonalloc(u8 *base) {
case R_X86_64_32:
case R_X86_64_32S:
case R_X86_64_64:
write((ref ? ref->frag->get_addr() : sym.get_addr()));
if (ref)
write(ref->frag->get_addr() + ref->addend);
else
write(sym.get_addr() + rel.r_addend);
break;
case R_X86_64_DTPOFF64:
write(sym.get_addr() - out::tls_begin + rel.r_addend);
write(sym.get_addr() + rel.r_addend - out::tls_begin);
break;
case R_X86_64_SIZE32:
case R_X86_64_SIZE64:

4
test/compressed-debug-info.sh
View File

@ -5,13 +5,13 @@ echo -n "Testing $(basename -s .sh $0) ..."
t=$(pwd)/tmp/$(basename -s .sh $0)
mkdir -p $t
cat <<EOF | c++ -c -o $t/a.o -g -gz=zlib-gnu -xc++ -
cat <<EOF | g++ -c -o $t/a.o -g -gz=zlib-gnu -xc++ -
int main() {
return 0;
}
EOF
cat <<EOF | c++ -c -o $t/b.o -g -gz=zlib -xc++ -
cat <<EOF | g++ -c -o $t/b.o -g -gz=zlib -xc++ -
int foo() {
return 0;
}