Adds support to the RL78 port for linker relaxation affecting .debug sections.

gas	* config/tc-rl78.h (TC_LINKRELAX_FIXUP): Define.
	(TC_FORCE_RELOCATION_SUB_SAME): Define.
	(DWARF2_USE_FIXED_ADVANCE_PC): Define.

	* gas/lns/lns.exp: Add RL78 to list of targets using
	DW_LNS_fixed_advance_pc.

bfd	* elf32-rl78.c (RL78_OP_REL): New macro.
	(rl78_elf_howto_table): Use it for complex relocs.
	(get_symbol_value): Handle the cases when the info or status
	arguments are NULL.
	(get_romstart): Cache the status returned by get_symbol_value.
	(get_ramstart): Likewise.
	(RL78_STACK_PUSH): Generate an error message if the stack
	overflows.
	(RL78_STACK_POP): Likewise for underflows.
	(rl78_compute_complex_reloc): New function.  Contains the basic
	processing code for all RL78 complex relocs.
	(rl78_special_reloc): New function.  Provides special reloc
	handling for complex relocs.
	(rl78_elf_relocate_section): Use rl78_compute_complex_reloc.
	(rl78_offset_for_reloc): Likewise.

binutils* readelf.c (target_specific_reloc_handling): Add code to handle
	RL78 complex relocs.

1 files changed, 36 insertions, 0 deletions

diff --git a/binutils/readelf.c b/binutils/readelf.c
index ca25136..1533806 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -11161,6 +11161,42 @@ target_specific_reloc_handling (Elf_Internal_Rela * reloc,
 	  }
 	break;
       }
+
+    case EM_RL78:
+      {
+	static bfd_vma saved_sym1 = 0;
+	static bfd_vma saved_sym2 = 0;
+	static bfd_vma value;
+
+	switch (reloc_type)
+	  {
+	  case 0x80: /* R_RL78_SYM.  */
+	    saved_sym1 = saved_sym2;
+	    saved_sym2 = symtab[get_reloc_symindex (reloc->r_info)].st_value;
+	    saved_sym2 += reloc->r_addend;
+	    return TRUE;
+
+	  case 0x83: /* R_RL78_OPsub.  */
+	    value = saved_sym1 - saved_sym2;
+	    saved_sym2 = saved_sym1 = 0;
+	    return TRUE;
+	    break;
+
+	  case 0x41: /* R_RL78_ABS32.  */
+	    byte_put (start + reloc->r_offset, value, 4);
+	    value = 0;
+	    return TRUE;
+
+	  case 0x43: /* R_RL78_ABS16.  */
+	    byte_put (start + reloc->r_offset, value, 2);
+	    value = 0;
+	    return TRUE;
+
+	  default:
+	    break;
+	  }
+	break;
+      }
     }
 
   return FALSE;