PR 10072

[deliverable/binutils-gdb.git] / bfd / elf32-arm.c

diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c
index cd40eefbf5c52e3d108ca01b5e0666fab066fb65..2d53304e4e3593e5f4798865e421145557a8f34c 100644 (file)
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -7178,6 +7178,40 @@ elf32_arm_final_link_relocate (reloc_howto_type *           howto,
         return bfd_reloc_ok;
       }
 
+    case R_ARM_THM_PC8:
+      /* PR 10073:  This reloc is not generated by the GNU toolchain,
+        but it is supported for compatibility with third party libraries
+        generated by other compilers, specifically the ARM/IAR.  */
+      {
+       bfd_vma insn;
+       bfd_signed_vma relocation;
+
+       insn = bfd_get_16 (input_bfd, hit_data);
+
+        if (globals->use_rel)
+         addend = (insn & 0x00ff) << 2;
+
+       relocation = value + addend;
+       relocation -= (input_section->output_section->vma
+                      + input_section->output_offset
+                      + rel->r_offset);
+
+        value = abs (relocation);
+
+       /* We do not check for overflow of this reloc.  Although strictly
+          speaking this is incorrect, it appears to be necessary in order
+          to work with IAR generated relocs.  Since GCC and GAS do not
+          generate R_ARM_THM_PC8 relocs, the lack of a check should not be
+          a problem for them.  */
+       value &= 0x3fc;
+
+       insn = (insn & 0xff00) | (value >> 2);
+
+       bfd_put_16 (input_bfd, insn, hit_data);
+
+        return bfd_reloc_ok;
+      }
+
     case R_ARM_THM_PC12:
       /* Corresponds to: ldr.w reg, [pc, #offset].  */
       {