https://sourceware.org/bugzilla/show_bug.cgi?id=17666
Bug ID: 17666
Summary: ld -r may create reloc sections with unordered relocs
Product: binutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: amodra at gmail dot com
cat > text1.s <<EOF
.section ".text1","ax",%progbits
.L1:
.dc.a .L2
.data
.L2:
.dc.a .L1
EOF
cat > text.s <<EOF
.text
.L1:
.dc.a .L2
.data
.L2:
.dc.a .L1
EOF
as -o text1.o text1.s
as -o text.o text.s
# remove empty sections
objcopy -R .text -R .bss text1.o
objcopy -R .bss text.o
ld -r -o out.o text1.o text.o
objdump -r -j.data out.o
shows .data relocs out of order.
This bug is caused by elflink.c processing text1.o first due to this loop:
for (o = abfd->sections; o != NULL; o = o->next)
{
for (p = o->map_head.link_order; p != NULL; p = p->next)
{
if (p->type == bfd_indirect_link_order
&& (bfd_get_flavour ((sub = p->u.indirect.section->owner))
== bfd_target_elf_flavour)
&& elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass)
{
if (! sub->output_has_begun)
{
if (! elf_link_input_bfd (&flinfo, sub))
goto error_return;
sub->output_has_begun = TRUE;
}
and the fact that reloc sections are not placed by the generic linker.
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