Support a few more relocations, most notably R_ARM_MOVW_ABS_NC and

R_ARM_MOVT_ABS that clang creates in its default configuration.

From FreeBSD.

ok jsg@

4 files changed, 73 insertions, 0 deletions

diff --git a/gnu/usr.bin/binutils-2.17/bfd/bfd-in2.h b/gnu/usr.bin/binutils-2.17/bfd/bfd-in2.h
index 1b4cef83dc1..f8738070a4b 100644
--- a/gnu/usr.bin/binutils-2.17/bfd/bfd-in2.h
+++ b/gnu/usr.bin/binutils-2.17/bfd/bfd-in2.h
@@ -2907,6 +2907,12 @@ pc-relative or some form of GOT-indirect relocation.  */
 /* 31-bit PC relative address.  */
   BFD_RELOC_ARM_PREL31,
 
+/* Low and High halfword relocations for MOVW and MOVT instructions.  */
+  BFD_RELOC_ARM_MOVW,
+  BFD_RELOC_ARM_MOVT,
+  BFD_RELOC_ARM_MOVW_PCREL,
+  BFD_RELOC_ARM_MOVT_PCREL,
+
 /* Relocations for setting up GOTs and PLTs for shared libraries.  */
   BFD_RELOC_ARM_JUMP_SLOT,
   BFD_RELOC_ARM_GLOB_DAT,
diff --git a/gnu/usr.bin/binutils-2.17/bfd/elf32-arm.c b/gnu/usr.bin/binutils-2.17/bfd/elf32-arm.c
index f16ec58c529..7556c6b1f1b 100644
--- a/gnu/usr.bin/binutils-2.17/bfd/elf32-arm.c
+++ b/gnu/usr.bin/binutils-2.17/bfd/elf32-arm.c
@@ -1366,6 +1366,10 @@ static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
     {BFD_RELOC_ARM_TLS_LE32,         R_ARM_TLS_LE32},
     {BFD_RELOC_VTABLE_INHERIT,	     R_ARM_GNU_VTINHERIT},
     {BFD_RELOC_VTABLE_ENTRY,	     R_ARM_GNU_VTENTRY},
+    {BFD_RELOC_ARM_MOVW,	     R_ARM_MOVW_ABS_NC},
+    {BFD_RELOC_ARM_MOVT,	     R_ARM_MOVT_ABS},
+    {BFD_RELOC_ARM_MOVW_PCREL,	     R_ARM_MOVW_PREL_NC},
+    {BFD_RELOC_ARM_MOVT_PCREL,	     R_ARM_MOVT_PREL},
   };
 
 static reloc_howto_type *
@@ -4080,6 +4084,49 @@ elf32_arm_final_link_relocate (reloc_howto_type *           howto,
         }
       return bfd_reloc_ok;
 
+    case R_ARM_MOVW_ABS_NC:
+    case R_ARM_MOVT_ABS:
+    case R_ARM_MOVW_PREL_NC:
+    case R_ARM_MOVT_PREL:
+    /* Until we properly support segment-base-relative addressing then
+       we assume the segment base to be zero, as for the group relocations.
+       Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC
+       and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS.  */
+    case R_ARM_MOVW_BREL_NC:
+    case R_ARM_MOVW_BREL:
+    case R_ARM_MOVT_BREL:
+      {
+	bfd_vma insn = bfd_get_32 (input_bfd, hit_data);
+
+	if (globals->use_rel)
+	  {
+	    addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
+	    signed_addend = (addend ^ 0x8000) - 0x8000;
+	  }
+
+	value += signed_addend;
+
+	if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL)
+	  value -= (input_section->output_section->vma
+		    + input_section->output_offset + rel->r_offset);
+
+	if (r_type == R_ARM_MOVW_BREL && value >= 0x10000)
+          return bfd_reloc_overflow;
+
+	if (sym_flags == STT_ARM_TFUNC)
+	  value |= 1;
+
+	if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL
+            || r_type == R_ARM_MOVT_BREL)
+	  value >>= 16;
+
+	insn &= 0xfff0f000;
+	insn |= value & 0xfff;
+	insn |= (value & 0xf000) << 4;
+	bfd_put_32 (input_bfd, insn, hit_data);
+      }
+      return bfd_reloc_ok;
+
     default:
       return bfd_reloc_notsupported;
     }
@@ -5651,6 +5698,10 @@ elf32_arm_gc_sweep_hook (bfd *                     abfd,
 	case R_ARM_JUMP24:
 	case R_ARM_PREL31:
 	case R_ARM_THM_CALL:
+	case R_ARM_MOVW_ABS_NC:
+	case R_ARM_MOVT_ABS:
+	case R_ARM_MOVW_PREL_NC:
+	case R_ARM_MOVT_PREL:
 	  /* Should the interworking branches be here also?  */
 
 	  if (h != NULL)
@@ -5861,6 +5912,10 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
 	  case R_ARM_JUMP24:
 	  case R_ARM_PREL31:
 	  case R_ARM_THM_CALL:
+	  case R_ARM_MOVW_ABS_NC:
+	  case R_ARM_MOVT_ABS:
+	  case R_ARM_MOVW_PREL_NC:
+	  case R_ARM_MOVT_PREL:
 	    /* Should the interworking branches be listed here?  */
 	    if (h != NULL)
 	      {
diff --git a/gnu/usr.bin/binutils-2.17/bfd/libbfd.h b/gnu/usr.bin/binutils-2.17/bfd/libbfd.h
index 24964899c91..d54a6decac9 100644
--- a/gnu/usr.bin/binutils-2.17/bfd/libbfd.h
+++ b/gnu/usr.bin/binutils-2.17/bfd/libbfd.h
@@ -1209,6 +1209,10 @@ static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@",
   "BFD_RELOC_ARM_SBREL32",
   "BFD_RELOC_ARM_TARGET2",
   "BFD_RELOC_ARM_PREL31",
+  "BFD_RELOC_ARM_MOVW",
+  "BFD_RELOC_ARM_MOVT",
+  "BFD_RELOC_ARM_MOVW_PCREL",
+  "BFD_RELOC_ARM_MOVT_PCREL",
   "BFD_RELOC_ARM_JUMP_SLOT",
   "BFD_RELOC_ARM_GLOB_DAT",
   "BFD_RELOC_ARM_GOT32",
diff --git a/gnu/usr.bin/binutils-2.17/bfd/reloc.c b/gnu/usr.bin/binutils-2.17/bfd/reloc.c
index c80a0f9daea..b809a6108d4 100644
--- a/gnu/usr.bin/binutils-2.17/bfd/reloc.c
+++ b/gnu/usr.bin/binutils-2.17/bfd/reloc.c
@@ -2705,6 +2705,14 @@ ENUM
   BFD_RELOC_ARM_PREL31
 ENUMDOC
   31-bit PC relative address.
+ENUM
+  BFD_RELOC_ARM_MOVW
+ENUMX
+  BFD_RELOC_ARM_MOVT
+ENUMX
+  BFD_RELOC_ARM_MOVW_PCREL
+ENUMX
+  BFD_RELOC_ARM_MOVT_PCREL
 
 ENUM
   BFD_RELOC_ARM_JUMP_SLOT