bfd: Delete R_LARCH_NONE from dyn info of LoongArch.

Some R_LARCH_64 in section .eh_frame will to generate
  R_LARCH_NONE, we change relocation to R_LARCH_32_PCREL
  from R_LARCH_64 in setction .eh_frame and not generate
  dynamic relocation for R_LARCH_32_PCREL.

  Add New relocate type R_LARCH_32_PCREL for .eh_frame.

  include/elf/
    loongarch.h

  bfd/
    bfd/bfd-in2.h
    libbfd.h
    reloc.c
    elfxx-loongarch.c
    elfnn-loongarch.c

  gas/config/
    tc-loongarch.c

  binutils/
    readelf.c

  ld/testsuite/ld-elf/
    eh5.d

bfd/bfd-in2.h

@@ -6309,6 +6309,7 @@ assembler and not (currently) written to any object files.  */
   BFD_RELOC_LARCH_TLS_LD_HI20,
   BFD_RELOC_LARCH_TLS_GD_PC_HI20,
   BFD_RELOC_LARCH_TLS_GD_HI20,
+  BFD_RELOC_LARCH_32_PCREL,
   BFD_RELOC_LARCH_RELAX,
   BFD_RELOC_UNUSED };
 

bfd/elfnn-loongarch.c

@@ -2010,6 +2010,17 @@ perform_relocation (const Elf_Internal_Rela *rel, asection *input_section,
       bfd_put (bits, input_bfd, opr1 - value, contents + rel->r_offset);
       break;
 
+    /* For eh_frame and debug info.  */
+    case R_LARCH_32_PCREL:
+      value -= sec_addr (input_section) + rel->r_offset;
+      value += rel->r_addend;
+      bfd_vma word = bfd_get (howto->bitsize, input_bfd,
+			      contents + rel->r_offset);
+      word = (word & ~howto->dst_mask) | (value & howto->dst_mask);
+      bfd_put (howto->bitsize, input_bfd, word, contents + rel->r_offset);
+      r = bfd_reloc_ok;
+      break;
+
     /* New reloc type.
        R_LARCH_B16 ~ R_LARCH_TLS_GD_HI20.  */
     case R_LARCH_B16:

bfd/elfxx-loongarch.c

@@ -1327,7 +1327,24 @@ static loongarch_reloc_howto_type loongarch_howto_table[] =
 	 reloc_bits,				/* adjust_reloc_bits */
 	 "gd_hi20"),				/* larch_reloc_type_name */
 
-  LOONGARCH_HOWTO (R_LARCH_RELAX,		/* type (99).  */
+  LOONGARCH_HOWTO (R_LARCH_32_PCREL,		/* type (99).  */
+	 0,					/* rightshift.  */
+	 4,					/* size.  */
+	 32,					/* bitsize.  */
+	 true,					/* pc_relative.  */
+	 0,					/* bitpos.  */
+	 complain_overflow_dont,		/* complain_on_overflow.  */
+	 bfd_elf_generic_reloc,			/* special_function.  */
+	 "R_LARCH_32_PCREL",			/* name.  */
+	 false,					/* partial_inplace.  */
+	 0,					/* src_mask */
+	 0xffffffff,				/* dst_mask */
+	 false,					/* pcrel_offset */
+	 BFD_RELOC_LARCH_32_PCREL,		/* bfd_reloc_code_real_type */
+	 NULL,					/* adjust_reloc_bits */
+	 NULL),					/* larch_reloc_type_name */
+
+  LOONGARCH_HOWTO (R_LARCH_RELAX,		/* type (100).  */
 	 0,					/* rightshift */
 	 1,					/* size */
 	 0,					/* bitsize */

bfd/libbfd.h

@@ -3492,6 +3492,7 @@ static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@",
   "BFD_RELOC_LARCH_TLS_LD_HI20",
   "BFD_RELOC_LARCH_TLS_GD_PC_HI20",
   "BFD_RELOC_LARCH_TLS_GD_HI20",
+  "BFD_RELOC_LARCH_32_PCREL",
   "BFD_RELOC_LARCH_RELAX",
  "@@overflow: BFD_RELOC_UNUSED@@",
 };

bfd/reloc.c

@@ -8304,6 +8304,9 @@ ENUMX
 ENUMX
   BFD_RELOC_LARCH_TLS_GD_HI20
 
+ENUMX
+  BFD_RELOC_LARCH_32_PCREL
+
 ENUMX
   BFD_RELOC_LARCH_RELAX
 

binutils/readelf.c

@@ -14389,6 +14389,8 @@ is_32bit_pcrel_reloc (Filedata * filedata, unsigned int reloc_type)
     case EM_AVR_OLD:
     case EM_AVR:
       return reloc_type == 36; /* R_AVR_32_PCREL.  */
+    case EM_LOONGARCH:
+      return reloc_type == 99;  /* R_LARCH_32_PCREL.  */
     case EM_MICROBLAZE:
       return reloc_type == 2;  /* R_MICROBLAZE_32_PCREL.  */
     case EM_OR1K:

include/elf/loongarch.h

@@ -223,8 +223,11 @@ RELOC_NUMBER (R_LARCH_TLS_GD_PC_HI20, 97)
    %gd_hi20 (sym).  */
 RELOC_NUMBER (R_LARCH_TLS_GD_HI20, 98)
 
+/* For eh_frame and debug info.  */
+RELOC_NUMBER (R_LARCH_32_PCREL, 99)
+
 /* RELAX.  */
-RELOC_NUMBER (R_LARCH_RELAX, 99)
+RELOC_NUMBER (R_LARCH_RELAX, 100)
 
 END_RELOC_NUMBERS (R_LARCH_count)
 

ld/testsuite/ld-elf/eh5.d

@@ -4,7 +4,7 @@
 #ld:
 #readelf: -wf
 #target: [check_as_cfi]
-#xfail: alpha-*-*ecoff hppa64-*-* tile*-*-* visium-*-* loongarch64-*-*
+#xfail: alpha-*-*ecoff hppa64-*-* tile*-*-* visium-*-*
 
 Contents of the .eh_frame section: