Only parse attributes in ELF sections with the SHT_GNU_ATTRIBUTES type if the OS is not Solaris. Set the is_solaris flag for Sparc solaris architectures

PR 33153

bfd/elf.c

@@ -2882,8 +2882,10 @@ bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
 
     default:
       /* Possibly an attributes section.  */
-      if (hdr->sh_type == SHT_GNU_ATTRIBUTES
-	  || hdr->sh_type == bed->obj_attrs_section_type)
+      if (get_elf_backend_data (abfd)->target_os != is_solaris
+	  /* PR 33153: Solaris defines SHT_SUNW_cap which collides with SHT_GNU_ATTRIBUTES.  */
+	  && (hdr->sh_type == SHT_GNU_ATTRIBUTES
+	      || hdr->sh_type == bed->obj_attrs_section_type))
 	{
 	  if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
 	    goto fail;

bfd/elf32-sparc.c

@@ -281,6 +281,9 @@ elf32_sparc_reloc_type_class (const struct bfd_link_info *info,
 #undef	TARGET_BIG_NAME
 #define	TARGET_BIG_NAME				"elf32-sparc-sol2"
 
+#undef ELF_TARGET_OS
+#define ELF_TARGET_OS				is_solaris
+
 #undef elf32_bed
 #define elf32_bed				elf32_sparc_sol2_bed
 

bfd/elf64-sparc.c

@@ -1008,6 +1008,9 @@ const struct elf_size_info elf64_sparc_size_info =
 #undef	TARGET_BIG_NAME
 #define	TARGET_BIG_NAME				"elf64-sparc-sol2"
 
+#undef ELF_TARGET_OS
+#define ELF_TARGET_OS				is_solaris
+
 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
    objects won't be recognized.  */
 #undef	ELF_OSABI