bfd/

	PR 6893 - Do not consider FDEs for discarded sections as invalid.
	* elf-eh-frame.c (_bfd_elf_parse_eh_frame): New REQUIRE_CLEARED_RELOCS.
	Consider FDEs with cleared relocations as valid and ignorable.

ld/testsuite/
	* ld-elf/eh-group.exp, ld-elf/eh-group1.s, ld-elf/eh-group2.s: New test.

binutils/
	Suppress warnings on NONE relocations to discarded sections.
	* readelf.c (is_none_reloc): New function.
	(debug_apply_relocations): Ignore is_none_reloc() relocations.

1 files changed, 50 insertions, 0 deletions

diff --git a/binutils/readelf.c b/binutils/readelf.c
index 9f1008c..2d356a6 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -8284,6 +8284,53 @@ is_16bit_abs_reloc (unsigned int reloc_type)
     }
 }
 
+/* Returns TRUE iff RELOC_TYPE is a NONE relocation used for discarded
+   relocation entries (possibly formerly used for SHT_GROUP sections).  */
+
+static bfd_boolean
+is_none_reloc (unsigned int reloc_type)
+{
+  switch (elf_header.e_machine)
+    {
+    case EM_68K:
+      return reloc_type == 0; /* R_68K_NONE.  */
+    case EM_386:
+      return reloc_type == 0; /* R_386_NONE.  */
+    case EM_SPARC32PLUS:
+    case EM_SPARCV9:
+    case EM_SPARC:
+      return reloc_type == 0; /* R_SPARC_NONE.  */
+    case EM_MIPS:
+      return reloc_type == 0; /* R_MIPS_NONE.  */
+    case EM_PARISC:
+      return reloc_type == 0; /* R_PARISC_NONE.  */
+    case EM_ALPHA:
+      return reloc_type == 0; /* R_ALPHA_NONE.  */
+    case EM_PPC:
+      return reloc_type == 0; /* R_PPC_NONE.  */
+    case EM_PPC64:
+      return reloc_type == 0; /* R_PPC64_NONE.  */
+    case EM_ARM:
+      return reloc_type == 0; /* R_ARM_NONE.  */
+    case EM_IA_64:
+      return reloc_type == 0; /* R_IA64_NONE.  */
+    case EM_SH:
+      return reloc_type == 0; /* R_SH_NONE.  */
+    case EM_S390_OLD:
+    case EM_S390:
+      return reloc_type == 0; /* R_390_NONE.  */
+    case EM_CRIS:
+      return reloc_type == 0; /* R_CRIS_NONE.  */
+    case EM_X86_64:
+      return reloc_type == 0; /* R_X86_64_NONE.  */
+    case EM_MN10300:
+      return reloc_type == 0; /* R_MN10300_NONE.  */
+    case EM_M32R:
+      return reloc_type == 0; /* R_M32R_NONE.  */
+    }
+  return FALSE;
+}
+
 /* Uncompresses a section that was compressed using zlib, in place.
  * This is a copy of bfd_uncompress_section_contents, in bfd/compress.c  */
 
@@ -8419,6 +8466,9 @@ debug_apply_relocations (void *file,
 
 	  reloc_type = get_reloc_type (rp->r_info);
 
+	  if (is_none_reloc (reloc_type))
+	    continue;
+
 	  if (is_32bit_abs_reloc (reloc_type)
 	      || is_32bit_pcrel_reloc (reloc_type))
 	    reloc_size = 4;