BFD: Fix the bug of R_LARCH_AGLIN caused by discard section

To represent the first and third expression of .align, R_LARCH_ALIGN need to
associate with a symbol. We define a local symbol for R_LARCH_AGLIN.
But if the section of the local symbol is discarded, it may result in
a undefined symbol error.

Instead, we use the section name symbols, and this does not need to
add extra symbols.

During partial linking (ld -r), if the symbol associated with a relocation is
STT_SECTION type, the addend of relocation needs to add the section output
offset. We prevent it for R_LARCH_ALIGN.

The elf_backend_data.rela_normal only can set all relocations of a target to
rela_normal. Add a new function is_rela_normal to elf_backend_data, it can
set part of relocations to rela_normal.

1 files changed, 1 insertions, 4 deletions

diff --git a/gas/config/tc-loongarch.c b/gas/config/tc-loongarch.c
index 30aefce..6b1a897 100644
--- a/gas/config/tc-loongarch.c
+++ b/gas/config/tc-loongarch.c
@@ -1791,10 +1791,7 @@ loongarch_frag_align_code (int n, int max)
      if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype).  */
   if (max > 0 && (bfd_vma) max < worst_case_bytes)
     {
-      s = symbol_find (".Lla-relax-align");
-      if (s == NULL)
-	s = (symbolS *)local_symbol_make (".Lla-relax-align", now_seg,
-					  &zero_address_frag, 0);
+      s = symbol_find (now_seg->name);
       ex.X_add_symbol = s;
       ex.X_op = O_symbol;
       ex.X_add_number = (max << 8) | n;